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Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Unbalanced Three-Phase Power Flow Calculation Based on Newton Method for Micro-Grid  

Science Journals Connector (OSTI)

Because of the connection of distributed generation to energy complementary micro-grid, there are multi-supplying points and loop ... power flow calculation based on Newton method for micro-grid is presented, in ...

Jiang Guixiu; Shu Jie; Wu Zhifeng…

2012-01-01T23:59:59.000Z

2

Design of Micro-grid System Based on Renewable Power Generation Units  

E-Print Network (OSTI)

Abstract- Micro-grid system is currently a conceptual solution to fulfill the commitment of reliable power delivery for future power systems. Renewable power sources such as wind and hydro offer the best potential for emission free power for future micro-grid systems. This paper presents a micro-grid system based on wind and hydro power sources and addresses issues related to operation, control, and stability of the system. The micro-grid system investigated in this paper represents a case study in Newfoundland, Canada. It consists of a small hydro generation unit and a wind farm that contains nine variable- speed, double-fed induction generator based wind turbines. Using Matlab/Simulink, the system is modeled and simulated to identify the technical issues involved in the operation of a micro-grid system based on renewable power generation units. The operational modes, technical challenges and a brief outline of conceptual approaches to addressing some of the technical issues are presented for further investigation.

Dr. K. Ravich; M. Manasa; Mr. P. Yohan Babu; G. V. P. Anjaneyulu

3

Modelling of a smart micro grid with renewable energy for rural area based on power line communication  

Science Journals Connector (OSTI)

Renewable energy conversion systems are main factor driving research on smart grid technology. Smart grid represents the paradigm to enable highly efficient power generation, transmission, distribution and consumption from the source to consumer. Bangladesh is facing energy crisis like other developing countries. High energy demands and environmental concerns force the transformation of existing power grid into smart micro grid. This paper proposes power line communication-based (PLC) platform on dynamic demand response and distributed generation including renewable power generation management approach in the context of smart micro grid model for residential and industrial consumptions. The implementation of smart micro grid to a rural area promotes the utilisation of renewable resources such as solar and wind energy. In this model, deployed PLC networks, data management system to integrate sensors, switchgears, transformers and other utility devices are used to interconnect smart homes to smart grids. Analytical results show the effectiveness of the proposed system to optimise residential renewable energy generation and smart meters to improve electrical grid control and energy conservation system.

Md. Atikur Rahman Sarker; Ken Nagasaka

2013-01-01T23:59:59.000Z

4

Grid Simulator for Power Quality Assessment of Micro-Grids  

E-Print Network (OSTI)

1 Grid Simulator for Power Quality Assessment of Micro-Grids Joaqu´in Eloy-Garc´iaa , Juan C-to-back to a 380 V three-phase grid and feeding a micro-grid composed of two inverter interfaced distributed of the simulator. Finally, a case study is presented by testing a micro-grid. Index Terms Grid Simulator, Power

Vasquez, Juan Carlos

5

CARNEGIE MELLON UNIVERSITY Electric Power Micro-grids: Opportunities and Challenges  

E-Print Network (OSTI)

CARNEGIE MELLON UNIVERSITY Electric Power Micro-grids: Opportunities and Challenges for an Emerging;Electric Power Micro-grids: Barriers and opportunities for an emerging distributed energy architecture ii the value of DERs is the micro-grid architecture, which builds on conventional continuous-use DER

6

Fault Diagnosis of Micro-grid Based on Petri Net  

Science Journals Connector (OSTI)

Micro-grid is the next generation of distribution system, ... 2010). This chapter analyzes the characteristics of Micro-grid and describes the typical form of Micro-grid. Considering the requirements of protectio...

Hongxia Wu; Guoming Yang; Ailing Zhang…

2014-01-01T23:59:59.000Z

7

Power management of hybrid micro-grid system by a generic centralized supervisory control scheme  

Science Journals Connector (OSTI)

Abstract This paper presents a generic centralized supervisory control scheme for the power management of multiple power converters based hybrid micro-grid system. The system consists of wind generators, photovoltaic system, multiple parallel connected power converters, utility grid, ac and dc loads. Power management of the micro-grid is performed under two cases: grid mode and local mode. Central supervisory unit (CSU) generates command signal to ensure the power management during the two modes. In local mode, the dc loads in the ac–dc hybrid system can be controlled. In the case of grid mode operation, power flow between the utility grid and micro-grid is controlled. A novel feature of this paper is the incorporation of the multiple power converters. The generated command signal from the CSU can also control the operation of the multiple power converters in both grid and local modes. An additional feature is the incorporation of sodium sulfur battery energy storage system (NAS BESS) which is used to smooth the output power fluctuation of the wind farm. The effectiveness of the control scheme is also verified using real time load pattern. The simulation is performed in PSCAD/EMTDC.

Mir Nahidul Ambia; Ahmed Al-Durra; Cedric Caruana; S.M. Muyeen

2014-01-01T23:59:59.000Z

8

Anforderungen an den Energie-und Leistungsumsatz der POWER TO GAS-Einheit im MICRO GRID eines industriellen Produktionsstandortes  

E-Print Network (OSTI)

Anforderungen an den Energie- und Leistungsumsatz der POWER TO GAS- Einheit im MICRO GRID eines MICRO GRID angeschlossenen elektrischen Energiespeicher und eine ,,POWER TO GAS" -Anlage kompensiert werden. Die ,,POWER TO GAS"­ Anlage entnimmt dem MICRO GRID überschüssige elektrische Energie zur

Paderborn, Universität

9

Investigation on Control Issues in Power Converters for Advanced Micro-Grid Operations  

Science Journals Connector (OSTI)

This paper investigates a novel design concept, in which a hybrid power interface system (HPIS) is constructed to work smartly in various micro-grid (MG) operations. Some distributed generation (...

Tsao-Tsung Ma

2014-01-01T23:59:59.000Z

10

Power Characteristics of a Fuel Cell Micro-grid with Wind Power Generation  

Science Journals Connector (OSTI)

A micro-grid technique is predicted to be effective with ... , when renewable energy is connected to a micro-grid, there is potential to reduce the amount ... discharge [21, 22, 91]. A micro-grid has an interconn...

2009-01-01T23:59:59.000Z

11

Photovoltaic micro-grid in a remote village in India: Survey based identification of socio-economic and other characteristics affecting connectivity with micro-grid  

Science Journals Connector (OSTI)

Abstract Load prediction is an essential component of the planning process of decentralized electricity supply systems based on micro-grids. However, accurate demand forecasting is a challenging task particularly for rural electrification projects. In this paper, actual operational data of a PV based micro-grid system in Sagar Island of India are analyzed in order to understand the role of different factors affecting households' connectivity, their electricity consumption and potential demands, thereby proposing an approach for planning (and designing) a micro-grid based decentralized electricity supply system. The analysis shows that potential demands for electricity within (as well as outside of) the current reach of the micro-grid are high and future expansion of the system would be effective by taking a 'phased approach’ of rural electrification. The analysis also shows that households with certain socio-economic characteristics have higher probability for connecting with the micro-grid and the relationship can be used to predict additional load requirements in case of grid extensions. Few recommendations for enhancing the connectivity further are also included in the discussion section of the paper.

Toru Kobayakawa; Tara C. Kandpal

2014-01-01T23:59:59.000Z

12

Methods of integrating a high penetration photovoltaic power plant into a micro grid.  

SciTech Connect

The island of Lanai is currently one of the highest penetration PV micro grids in the world, with the 1.2 MWAC La Ola Solar Farm operating on a grid with a peak net load of 4.7 MW. This facility interconnects to one of Lanai's three 12.47 kV distribution circuits. An initial interconnection requirements study (IRS) determined that several control and performance features are necessary to ensure safe and reliable operation of the island grid. These include power curtailment, power factor control, over/under voltage and frequency ride through, and power ramp rate limiting. While deemed necessary for stable grid operation, many of these features contradict the current IEEE 1547 interconnection requirements governing distributed generators. These controls have been successfully implemented, tested, and operated since January 2009. Currently, the system is producing power in a curtailed mode according to the requirements of a power purchase agreement (PPA).

Stein, Joshua S.; Johnson, Lars (SunPower Corporation, Richmond, CA); Nelson, Lauren (SunPower Corporation, Richmond, CA); Lenox, Carl (SunPower Corporation, Richmond, CA); Johnson, Robert. (SunPower Corporation, Richmond, CA)

2010-06-01T23:59:59.000Z

13

State Estimation of the Micro-grid  

Science Journals Connector (OSTI)

For the goal of actual needs of power companies, this chapter develops a state estimation procedure of the micro-grid, using branch currents as state variables, ... In this chapter, an IEEE-33 nodes micro-grid is...

Jinling Lu; Guodong Zhu; Yuyang Miao

2014-01-01T23:59:59.000Z

14

Research of a self-tuning algorithm for industrial micro-grid power conversion  

Science Journals Connector (OSTI)

With more and more attention on the grid current harmonic in recent years, many control schemes of the Pulse Width Modulation Voltage Source Converter (PWM-VSC) have been investigated. Conventional PI controller has limitations in sensitivity subject to load and system parameter variation. Even the stability of the system can be threatened under a large and sudden load change. In this paper, the practical situation of a VSC for industrial Micro Grid (MG) is considered and an Artificial Neural Network (ANN) based control method is employed to solve the problem. Meanwhile, an online parameter tuning algorithm is introduced for its advantage of self-tuning and system character identification. The proposed control scheme is verified through simulation and prototype experiment. The experiment is performed to demonstrate the advantages of the proposed controller under different situations.

Jinbang Xu; Zhizhuo Wu; Anwen Shen; Junfeng Chen

2014-01-01T23:59:59.000Z

15

Renewable Energy Sources Optimization: A Micro-Grid Model Design  

Science Journals Connector (OSTI)

Abstract This paper analyzes the possibility to develop the simple micro-grid model in optimizing the utilization of local renewable energy for on-grid area. The proposed micro-grid model integrates the power plants driven by renewable energy sources employing micro hydro (MHP) and photovoltaic system (PV) which is connected to grid system. This model is analyzed using HOMER and MATLAB software. Based on the load profiles and the availability of water resources, the HOMER simulates the proposed micro-grid model with three options of MHP capacity. The simulation results show that the micro-grid model with the largest capacity MHP produced the lowest energy cost, greatest reduction of CO2 emission, and largest fraction of renewable energy. However, these result required the expensive initial capital cost. In addition, the PV power generation was always recommended with a minimum capacity. Hence, MATLAB results show the performances of the power plants with renewable energy sources were used maximally.

R. Nazir; H.D. Laksono; E.P. Waldi; E. Ekaputra; P. Coveria

2014-01-01T23:59:59.000Z

16

Micro-grid operation of inverter based distributed generation with voltage and frequency dependent loads  

E-Print Network (OSTI)

Distribution systems are experiencing increasing penetration of distributed generation (DG). One attractive option is to use the available DG capacity during utility outages by forming planned micro-grids. Load sharing ...

Zeineldin, H. H.

17

Short-term resource scheduling of a renewable energy based micro grid  

Science Journals Connector (OSTI)

Abstract In recent years due to the decreasing fossil fuel reserves and the increasing social stress, complex power networks have no other choices except to seek for alternative energy sources to eliminate the environmental issues caused by the traditional power systems. Thus, the scheduling of energy sources in a complex Micro-Grid (MG) comprising Micro Turbine (MT), Photo Voltaic (PV), Fuel Cell (FC), battery units and Wind Turbine (WT) has been investigated in this paper. Furthermore, a multi-objective framework is presented to simultaneously handle the two objective functions including minimization of total operation cost and minimization of emission. In this regard, Normal Boundary intersection (NBI) technique is employed to solve the proposed multi-objective problem and generate the Pareto set. Besides, a fuzzy satisfying method is used for decision making process. Afterward, the results obtained from the presented method are compared to the ones derived from other methods. Finally, it is verified that the proposed solution method results in better solutions for operation cost, emission and the execution time.

Maziar Izadbakhsh; Majid Gandomkar; Alireza Rezvani; Abdollah Ahmadi

2015-01-01T23:59:59.000Z

18

Equipment Plan of a Compound Interconnection Micro-grid Composed of Diesel Power Plants and a Fuel Cell  

Science Journals Connector (OSTI)

Installation of the fuel cell micro-grid in an urban area is the technology ... Generally, as for the introduction of a micro-grid in a city area, the following points ... fuel cell by connecting PEM-FC to a micro-grid

2009-01-01T23:59:59.000Z

19

Stochastic scenario-based model and investigating size of battery energy storage and thermal energy storage for micro-grid  

Science Journals Connector (OSTI)

Abstract Energy storage systems (ESS) are designed to accumulate energy when production exceeds demand and to make it available at the user’s request. They can help match energy supply and demand, exploit the variable production of renewable energy sources (e.g. solar and wind), increase the overall efficiency of the energy system and reduce CO2 emissions. This paper presents a unit commitment formulation for micro-grid that includes a significant number of grid parallel PEM-Fuel Cell Power Plants (PEM-FCPPs) with ramping rate and minimum up and down time constraints. The aim of this problem is to determine the optimum size of energy storage devices like hydrogen, thermal energy and battery energy storages in order to schedule the committed units’ output power while satisfying practical constraints and electrical/thermal load demand over one day with 15 min time step. In order to best use of multiple PEM-FCPPs, hydrogen storage management is carried out. Also, since the electrical and heat load demand are not synchronized, it could be useful to store the extra heat of PEM-FCPPs in the peak electrical load in order to satisfy delayed heat demands. Due to uncertainty nature of electrical/thermal load, photovoltaic and wind turbine output power and market price, a two-stage scenario-based stochastic programming model, where the first stage prescribes the here-and-now variables and the second stage determines the optima value of wait-and-see variables under cost minimization. Quantitative results show the usefulness and viability of the suggested approach.

Sirus Mohammadi; Ali Mohammadi

2014-01-01T23:59:59.000Z

20

Off-grid Solar PV Power for Humanitarian Action: From Emergency Communications to Refugee Camp Micro-grids  

Science Journals Connector (OSTI)

Abstract The need for new innovative technologies to support humanitarian action is evident today. Efficient and economic technologies properly deployed and integrated should mitigate some of the potential negative social effects of poor refugee camp infrastructure engineering. The body of the paper identifies off-grid solar Photovoltaic (PV) and solar PV hybrid packaged systems that are applicable to emergency relief activities, refugee camp activities and micro-grid development. The paper's concentration on off-grid power, the description of these engineered systems by humanitarian activity and the identification of the different engineered packaged solutions is aimed at stimulating a discussion to help scale more appropriate technologies for humanitarian action. The paper concludes with a discussion of present and future private sector business strategies to support scalability of this new and growing market.

Joseph Franceschi; Jaron Rothkop; Gabriel Miller

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Entwicklung eines Netzleitsystems fr das MICRO GRID eines industriellen Produktionsstandortes mit einem hohen Anteil  

E-Print Network (OSTI)

an das lokale MICRO GRID angeschlossenen elektrischen Energiespeicher und eine ,,POWER TO GAS" -Anlage

Paderborn, Universität

22

Power Supply Synchronization without Communication  

E-Print Network (OSTI)

as Micro-Grid based Electrical Power Systems ­ MGEPS [2]; and in Parallel Connected Uninterruptible Power

Moehlis, Jeff

23

An optimization model for regional micro-grid system management based on hybrid inexact stochastic-fuzzy chance-constrained programming  

Science Journals Connector (OSTI)

Abstract Micro-grid system management considering air pollutant control and carbon dioxide (CO2) mitigation is a challenging task, since many system parameters such as electric demand, resource availability, system cost as well as their interrelationships may appear uncertain. To reflect these uncertainties, effective inexact system-analysis methods are desired. In this study, a hybrid inexact stochastic-fuzzy chance-constrained programming (ITSFCCP) was developed for micro-grid system planning, and interval-parameter programming (IPP), two-stage stochastic programming (TSP) and fuzzy credibility constrained programming (FCCP) methods were integrated into a general framework to manage pollutants and CO2 emissions under uncertainties presented as interval values, fuzzy possibilistic and stochastic probabilities. Moreover, FCCP allowed satisfaction of system constraints at specified confidence level, leading to model solutions with the lowest system cost under acceptable risk magnitudes. The developed model was applied to a case of micro-grid system over a 24-h optimization horizon with a real time and dynamic air pollutant control, and total amount control for CO2 emission. Optimal generation dispatch strategies were derived under different assumptions for risk preferences and emission reduction goals. The obtained results indicated that stable intervals for the objective function and decision variables could be generated, which were useful for helping decision makers identify the desired electric power generation patterns, and CO2 emission reduction under complex uncertainties, and gain in-depth insights into the trade-offs between system economy and reliability.

L. Ji; D.X. Niu; M. Xu; G.H. Huang

2015-01-01T23:59:59.000Z

24

Micro-grid Environmental Economic Dispatch Using Improved Linearly Decreasing Weight Particle Swarm Optimization  

Science Journals Connector (OSTI)

Comparing with large power grid, micro-grid is quite different in operation method, energy ... on the environmental economic dispatch of a simplified micro-grid which consists of photovoltaic generation, wind tur...

Gujing Han; Yunhong Xia; Wuzhi Min

2014-01-01T23:59:59.000Z

25

Specialized micro grid (IDAPS) for intelligently managing customer-owned DER's  

Science Journals Connector (OSTI)

The electrical power system is an enabling infrastructure that supports the operation of other critical infrastructures and thus the economic well being of a nation. It is, therefore, very important to design for resiliency and autonomous reconfigurability ... Keywords: intelligent distributed autonomous power system (IDAPS), intelligent micro grid, web based technology

Jarupula Somlal

2010-07-01T23:59:59.000Z

26

Progress and problems in micro-grid protection schemes  

Science Journals Connector (OSTI)

Abstract Globally, gradual depletion of fossil fuel resources, poor energy efficiency and environmental pollution are among the main problems faced in the conventional power system. This leads to a new trend of generating power locally by using Distributed Energy Resources (DERs) at distribution voltage level. The concept of micro-grid has appeared as an attractive alternative for integration of \\{DERs\\} in the distribution networks which has numerous advantages in terms of reliability and power quality. Despite the advantages, several challenges are still hindering the development of micro-grids. One of the challenges is micro-grid protection, and to resolve this, researchers have been working to develop different protection schemes. The objective of this study is to review previous research works on the existing protection strategies deployed in addressing micro-grid protection issues in both grid-connected and islanded mode of operation.

Sohrab Mirsaeidi; Dalila Mat Said; Mohd. Wazir Mustafa; Mohd. Hafiz Habibuddin; Kimia Ghaffari

2014-01-01T23:59:59.000Z

27

Integration of Distributed Energy The CERTS MicroGrid Concept  

E-Print Network (OSTI)

Integration of Distributed Energy Resources The CERTS MicroGrid Concept CALIFORNIA ENERGY are being challenged to maintain the reliability of the grid and support economic transfers of power Consortium for Electric Reliability Technology Solutions White Paper on Integration of Distributed Energy

28

A Review of DC Micro-grid Protection  

Science Journals Connector (OSTI)

In this paper, an overview of DC micro-grid is described, which includes the status of DC micro-grid protection and its future development. The paper presents the key techniques of DC micro-grid protection. So fa...

Yuhong Xie; Jia Ning; Yanquan Huang…

2013-01-01T23:59:59.000Z

29

Optimal Operation for Cogenerating System of Micro-grid Network  

Science Journals Connector (OSTI)

This paper presents a mathematical model for optimal operating cogeneration of Micro-Grid Network. The electrical and thermal energy production ... solution of Optimal operation for cogenerating system of micro-grid

Phil-Hun Cho; Hak-Man Kim; Myong-Chul Shin…

2005-01-01T23:59:59.000Z

30

Micro-Grids for Colonias (TX)  

SciTech Connect

This report describes the results of the final implementation and testing of a hybrid micro-grid system designed for off-grid applications in underserved Colonias along the Texas/Mexico border. The project is a federally funded follow-on to a project funded by the Texas State Energy Conservation Office in 2007 that developed and demonstrated initial prototype hybrid generation systems consisting of a proprietary energy storage technology, high efficiency charging and inverting systems, photovoltaic cells, a wind turbine, and bio-diesel generators. This combination of technologies provided continuous power to dwellings that are not grid connected, with a significant savings in fuel by allowing power generation at highly efficient operating conditions. The objective of this project was to complete development of the prototype systems and to finalize and engineering design; to install and operate the systems in the intended environment, and to evaluate the technical and economic effectiveness of the systems. The objectives of this project were met. This report documents the final design that was achieved and includes the engineering design documents for the system. The system operated as designed, with the system availability limited by maintenance requirements of the diesel gensets. Overall, the system achieved a 96% availability over the operation of the three deployed systems. Capital costs of the systems were dependent upon both the size of the generation system and the scope of the distribution grid, but, in this instance, the systems averaged $0.72/kWh delivered. This cost would decrease significantly as utilization of the system increased. The system with the highest utilization achieved a capitol cost amortized value of $0.34/kWh produced. The average amortized fuel and maintenance cost was $0.48/kWh which was dependent upon the amount of maintenance required by the diesel generator. Economically, the system is difficult to justify as an alternative to grid power. However, the operational costs are reasonable if grid power is unavailable, e.g. in a remote area or in a disaster recovery situation. In fact, avoided fuel costs for the smaller of the systems in use during this project would have a payback of the capital costs of that system in 2.3 years, far short of the effective system life.

Dean Schneider; Michael Martin; Renee Berry; Charles Moyer

2012-07-31T23:59:59.000Z

31

Energie-und Leistungsbilanzierung im MICRO GRID eines industriellen Produktionsstandortes mit  

E-Print Network (OSTI)

an das lokale MICRO GRID angeschlossenen elektrischen Energiespeicher und eine ,,POWER TO GAS" -Anlage ermöglichen. Aufgabe: Um einen effizienten Einsatz des BHKW's, des Speichers und der POWER TO GAS ­ Einheit zu Konzeptes zum wirtschaftlich effizienten Einsatz des BHKW's, des Speichers und der POWER TO GAS ­ Einheit 6

Paderborn, Universität

32

Optimization of micro-grid system using MOPSO  

Science Journals Connector (OSTI)

Abstract Access to a reliable source of electricity is a basic need for any community as it can improve the living standards characterized via the improvement of healthcare, education, and the local economy at large. There are two key factors to consider when assessing the appropriateness of a micro-grid system, the cost-effectiveness of the system and the quality of service. The tradeoff between cost and reliability of the system is a major compromise in designing hybrid systems. In this way, optimization of a Hybrid Micro-Grid System (HMGS) is investigated. A hybrid wind/PV system with battery storage and diesel generator is used for this purpose. The power management algorithm is applied to the load, and the Multi-Objective Particle Swarm Optimization (MOPSO) method is used to find the best configuration of the system and for sizing the components. A set of recent hourly wind speed data from three meteorological stations in Iran, namely: Nahavand, Rafsanjan, and Khash, are selected and tested for the optimization of HMGS. Despite design complexity of the aforementioned systems, the results show that the MOPSO optimization model produces appropriate sizing of the components for each location. It is also suggested that the use of HMGS can be considered as a good alternative to promote electrification projects and enhance energy access within remote Iranian areas or other developing countries enjoying the same or similar climatic conditions.

Hanieh Borhanazad; Saad Mekhilef; Velappa Gounder Ganapathy; Mostafa Modiri-Delshad; Ali Mirtaheri

2014-01-01T23:59:59.000Z

33

Regional protection scheme designed for low-voltage micro-grids  

Science Journals Connector (OSTI)

Abstract No selective protection exists in the low-voltage level micro-grid integrated with DG presently. To deal with this problem, a new type of micro-grid protection scheme based on fault component is put forward. To implement this scheme, the micro-grid is divided into several regions, and each region is regarded as the target of protection. As a result, not only the scope of outage is decreased in accordance with the action of the protection, but the economic requirement of protection arrangement is met. Taking the negative sequence component as the basic characteristic quantity, a variety of asymmetric faults effectively can be identified successfully. Considering the adverse effects of unbalanced load and the switching of large capacity single phase load, a low-voltage supplement criterion is introduced. The effectiveness of this protection scheme is verified with EMTDC based simulation tests.

Xiangning Lin; Rui Zhang; Ning Tong; Xianshan Li; Ming Li; Dexian Yang

2015-01-01T23:59:59.000Z

34

Renewable generation and demand response integration in micro-grids: development of a new energy management and control system  

Science Journals Connector (OSTI)

The aim of this research resides in the development of an energy management and control system to control a micro-grid based on the use of renewable generation and demand resources to introduce the application of...

Carlos Álvarez-Bel; Guillermo Escrivá-Escrivá; Manuel Alcázar-Ortega

2013-11-01T23:59:59.000Z

35

Expert energy management of a micro-grid considering wind energy uncertainty  

Science Journals Connector (OSTI)

Abstract Recently, the use of wind generation has rapidly increased in micro-grids. Due to the fluctuation of wind power, it is difficult to schedule wind turbines (WTs) with other distributed energy resources (DERs). In this paper, we propose an expert energy management system (EEMS) for optimal operation of \\{WTs\\} and other \\{DERs\\} in an interconnected micro-grid. The main purpose of the proposed EEMS is to find the optimal set points of \\{DERs\\} and storage devices, in such a way that the total operation cost and the net emission are simultaneously minimized. The EEMS consists of wind power forecasting module, smart energy storage system (ESS) module and optimization module. For optimal scheduling of WTs, the power forecasting module determines the possible available capacity of wind generation in the micro-grid. To do this, first, an artificial neural network (ANN) is used to forecast wind speed. Then, the obtaining results are used considering forecasting uncertainty by the probabilistic concept of confidence interval. To reduce the fluctuations of wind power generation and improve the micro-grid performances, a smart energy storage system (ESS) module is used. For optimal management of the ESS, the comprehensive mathematical model with practical constraints is extracted. Finally, an efficient modified Bacterial Foraging Optimization (MBFO) module is proposed to solve the multi-objective problem. An interactive fuzzy satisfying method is also used to simulate the trade-off between the conflicting objectives (cost and emission). To evaluate the proposed algorithm, the EEMS is applied to a typical micro-grid which consists of various DERs, smart ESS and electrical loads. The results show that the EEMS can effectively coordinate the power generation of \\{DERs\\} and ESS with respect to economic and environmental considerations.

Mehdi Motevasel; Ali Reza Seifi

2014-01-01T23:59:59.000Z

36

Localizing Micro-grids Research for the SE Asian Region  

NLE Websites -- All DOE Office Websites (Extended Search)

Localizing Micro-grids Research for the SE Asian Region Localizing Micro-grids Research for the SE Asian Region Speaker(s): Cheng-Guan (Michael) Quah Valerie Choy Date: December 3, 2010 - 12:00pm Location: 90-3122 This presentation discusses developments (and test-beds) of micro-grids and distributed generation systems that are on-going in Singapore and poses the question as to whether simpler versions of such systems would be applicable to meet the challenges of rural electrification and energy poverty particularly those of its closest neighbors. Southeast Asia is an ethnically and culturally diverse region comprising more than 10 nations where 160 million people still live without electricity. Off-grid electrification for rural village communities and eco-resorts using DG and micro-grid systems are conceivable but many technical, political, cultural

37

Control Methods and Simulations of Micro-grid  

Science Journals Connector (OSTI)

The micro-grid’s control methods and simulations are presented...P/Q control is adopted. However, the control method is changed to U/f...control when it turns to the islanded mode. To demonstrate the operation of...

He-Jin Liu; Ke-Jun Li; Ying Sun; Zhen-Yu Zou; Yue Ma…

2011-01-01T23:59:59.000Z

38

A Virtual Laboratory for Micro-Grid Information and Communication Infrastructures  

E-Print Network (OSTI)

1 A Virtual Laboratory for Micro-Grid Information and Communication Infrastructures James Weimer reliability. Within the micro-grid, this requires identifying and testing ICT infrastructures infrastructures for micro-grid deployment, this work introduces the Virtual Micro- Grid Laboratory (VMGL

Johansson, Karl Henrik

39

WindTurbineGenerator Introduction of the Renewable Micro-Grid Test-Bed  

E-Print Network (OSTI)

Introduction of the Renewable Micro-Grid Test-Bed Dr. Wenxin Liu Smart Micro-grid and Renewable Technology University Topology of the Overall Experimental Platform Photo of the Micro-grid Test-bed Overview of the Micro-grid Test-Bed Cubicle #1: Main & PV Simulator PV Simulator: 3kW, 0~200V, 18A Unidirectional

Johnson, Eric E.

40

An optimized co-ordinated approach for harmonic minimization of Doubly Fed Induction Generator connected micro-grid system  

Science Journals Connector (OSTI)

Abstract This paper illustrates the biogeography based optimization (BBO) based selected harmonic elimination technique for \\{DFIGs\\} connected to a micro-grid. The lower order harmonics are individually eliminated in each DFIG outputs but the higher order harmonics are eliminated in such a way that the harmonics generated by one source is eliminated by the other after generating the same order of harmonics in opposite phase. The switching angles are computed off-line and stored in microcontroller memory in the form of look-up tables for on line application. The excitation power for the inverters is obtained from a photovoltaic (PV) panel. Proper simulations are executed for the proposed theory and subsequently supported by investigational verifications. Both the simulation and experiments agree well with the analytical formulation. The total harmonic distortion (THD) in the output is found to be within the stipulated limit.

Krishna Sarker; Debashis Chatterjee; S.K. Goswami

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Vehicle to Micro-Grid: Leveraging Existing Assets for Reliable Energy Management (Poster), NREL (National Renewable Energy Laboratory)  

NLE Websites -- All DOE Office Websites (Extended Search)

to Micro-Grid: Leveraging Existing Assets for Reliable Energy Management to Micro-Grid: Leveraging Existing Assets for Reliable Energy Management Mike Simpson, Tony Markel, and Michael O'Keefe National Renewable Energy Laboratory INTRODUCTION OPPORTUNITY National Renewable Energy Laboratory Presented at the 4th International Conference on Integration of Renewable & Distributed Energy Resources, December 6-10 , 2010 * Albuquerque, New Mexico U.S. military bases, such as Fort Carson, are interested in opportunities to lower energy consumption and use renewable resources. l Electricity GCV Micro-Grid The Smith Electric Newton all-electric truck Fort Carson Photovoltaic Installation NREL PIX 17631 NREL PIX # 17394 Natural Gas Renewable Energy Truck Fleet Diesel Generators

42

Policies and demonstrations of micro-grids in China: A review  

Science Journals Connector (OSTI)

Abstract Micro-grids are effective concepts and systems to interface renewable and sustainable energy resources into utility, which has been paid significant attention. In this paper, the policies and demonstrations of micro-grids for researches and developments, as well as practical applications in China have been comprehensively reviewed. Many recent policies on renewable energy and micro-grids are summarized, which have been guiding and contributing the development of micro-grids in China. Additionally, the available micro-grids demonstrations in China are also introduced in detail. Finally, the emergency necessaries and trends of micro-grid applications in China have been concluded.

Zheng Zeng; Rongxiang Zhao; Huan Yang; Shengqing Tang

2014-01-01T23:59:59.000Z

43

Load Response Characteristics of a Fuel Cell Micro-grid with Control of the Number of Units  

Science Journals Connector (OSTI)

The micro-grid is expected to reduce the discharge of ... in an emergency [21–23]. A micro-grid technique connects energy equipment, such as an ... cooperating piece of equipment. In forming a micro-grid, the coo...

2009-01-01T23:59:59.000Z

44

Micro-grids: Practical applications of grid technology to small distributed collaborations  

E-Print Network (OSTI)

Micro-Grids: Practical Applications of Grid Technology toof the normal use of the micro-grid we have been describing.Grid system that was used in the Matisse project. MEMS Technology Micro-

Lee, Jason R.

2001-01-01T23:59:59.000Z

45

Study on Smart Energy Storage Technology and Control Strategy in Micro-Grid  

Science Journals Connector (OSTI)

Energy storage technology is an indispensable support for reliable operation of micro-grid (MG). Various forms of energy storage...

Xing-guo Tan; Shan Lu

2012-01-01T23:59:59.000Z

46

Small-signal dynamic model of a micro-grid including conventional and electronically  

E-Print Network (OSTI)

Small-signal dynamic model of a micro-grid including conventional and electronically interfaced-signal modelling of a micro-grid system that includes conventional (rotating machine) and electronically interfaced deviations in the overall system model and provides a methodology for the analysis of autonomous micro-grid

Lehn, Peter W.

47

Preparation of Micro-grid for the Electron Microscopic Observation with High Magnification  

Science Journals Connector (OSTI)

......1958 letter LETTER Preparation of Micro-grid for the Electron Microscopic Observation...Japan L E T T E R Preparation of Micro-grid for the Electron Microscopic Observation...call this collodion net-work a micro-grid. Procedure of preparation (1......

S. Sakata

1958-01-01T23:59:59.000Z

48

A Quasi-Feed-In-Tariff policy formulation in micro-grids: A bi-level multi-period approach  

Science Journals Connector (OSTI)

Abstract A Quasi-Feed-In-Tariff (QFIT) policy formulation is presented for micro-grids that integrates renewable energy generation considering Policy Makers? and Generation Companies? (GENCOs) objectives assuming a bi-level multi-period formulation that integrates physical characteristics of the power-grid. The upper-level problem corresponds to the PM, whereas the lower-level decisions are made by GENCOs. We consider that some \\{GENCOs\\} are green energy producers, while others are black energy producers. Policy makers incentivize green energy producers to generate energy through the payment of optimal time-varying subsidy price. The policy maker?s main objective is to maximize an overall social welfare that includes factors such as demand surplus, energy cost, renewable energy subsidy price, and environmental standards. The lower-level problem corresponding to the \\{GENCOs\\} is based on maximizing the players? profits. The proposed QFIT policy differs from the FIT policy in the sense that the subsidy price-based contracts offered to green energy producers dynamically change over time, depending on the physical properties of the grid, demand, and energy price fluctuations. The integrated problem solves for time-varying subsidy price and equilibrium energy quantities that optimize the system welfare under different grid and system conditions.

Ahmad F. Taha; Nadim A. Hachem; Jitesh H. Panchal

2014-01-01T23:59:59.000Z

49

Photocatalytic activity of ZnO films with micro-grid structure  

Science Journals Connector (OSTI)

A layer of zinc oxide (ZnO) micro-grid was deposited on the surface of ZnO ... ZnO film and the regular arrangement of the micro-grid. The microgrid ZnO has a lower specular ... degradation experiments on methyle...

Chunzhi Li; Wenwen Wang; Junying Zhang…

2009-09-01T23:59:59.000Z

50

Fabrication of phosphor micro-grids using proton beam lithography.  

SciTech Connect

A new nuclear microscopy technique called ion photon emission microscopy or IPEM was recently invented. IPEM allows analysis involving single ions, such as ion beam induced charge (IBIC) or single event upset (SEU) imaging using a slightly modified optical microscope. The spatial resolution of IPEM is currently limited to more than 10 {micro}m by the scattering and reflection of ion-induced photons, i.e. light blooming or spreading, in the ionoluminescent phosphor layer. We are developing a 'Microscopic Gridded Phosphor' (also called Black Matrix) where the phosphor nanocrystals are confined within the gaps of a micrometer scale opaque grid, which limits the amount of detrimental light blooming. MeV-energy proton beam lithography is ideally suited to lithographically form masks for the grid because of high aspect ratio, pattern density and sub-micron resolution of this technique. In brief, the fabrication of the grids was made in the following manner: (1) a MeV proton beam focused to 1.5-2 {micro}m directly fabricated a matrix of pillars in a 15 {micro}m thick SU-8 lithographic resist; (2) 7:1 aspect ratio pillars were then formed by developing the proton exposed area; (3) Ni (Au) was electrochemically deposited onto Cu-coated Si from a sulfamate bath (or buffered CN bath); (4) the SU-8 pillars were removed by chemical etching; finally (5) the metal micro-grid was freed from its substrate by etching the underlying Cu layer. Our proposed metal micro-grids promise an order-of-magnitude improvement in the resolution of IPEM.

Rossi, Paolo (University of Padova and INFN, Padova, Italy); Antolak, Arlyn J.; Provencio, Paula Polyak; Doyle, Barney Lee; Malmqvist, Klas (Lund Institute of Technology, Lund, Sweden); Hearne, Sean Joseph; Nilsson, Christer (Lund Institute of Technology, Lund, Sweden); Kristiansson, Per (Lund Institute of Technology, Lund, Sweden); Wegden, Marie (Lund Institute of Technology, Lund, Sweden); Elfman, Mikael (Lund Institute of Technology, Lund, Sweden); Pallon, Jan (Lund Institute of Technology, Lund, Sweden); Auzelyte, Vaida (Lund Institute of Technology, Lund, Sweden)

2005-07-01T23:59:59.000Z

51

CO2 Discharged from a Compound Micro-grid of a Hydrogenation City Gas Engine and a Fuel Cell  

Science Journals Connector (OSTI)

The introduction to a urban area of a micro-grid has the following advantages: (a) The ... built; and (c) with an independent micro-grid, the scale of equipment for distributing electricity ... is expected to bec...

2009-01-01T23:59:59.000Z

52

Abstract -This paper presents the coordinated control of distributed energy storage systems (DESSs) in DC micro-grids.  

E-Print Network (OSTI)

) in DC micro-grids. In order to balance the state-of-charge (SoC) of each energy storage unit (ESU--Droop control; distributed energy storage system (DESS); DC micro-grids; state-of-charge (SoC) I. INTRODUCTION ith the objective to electrify remote areas and energy islands, the micro-grid concept is gaining more

Vasquez, Juan Carlos

53

Distributed PI-Control with Applications to Power Systems Frequency Control  

E-Print Network (OSTI)

decentralization of power transmission systems, as well as the independence of micro-grids highlight the need

Dimarogonas, Dimos

54

Photocatalytic performance of TiO2 thin films connected with Cu micro-grid  

Science Journals Connector (OSTI)

Aiming at reducing the recombination of photo-induced carriers in semiconductor photocatalytic process, we prepared TiO2...thin film with its surface modified by a connected Cu micro-grid via a microsphere lithog...

HaiLing Zhu; JunYing Zhang; TianMin Wang…

2009-08-01T23:59:59.000Z

55

Micro-grid energy dispatch optimization and predictive control algorithms; A UC Irvine case study  

Science Journals Connector (OSTI)

Abstract Distributed power and energy resources are now being used to meet the combined electric power, heating, and cooling demands of many buildings. The addition of on-site renewables and their accompanying intermittency and non-coincidence requires even greater dynamic performance from the distributed power and energy system. Load following generators, energy storage devices, and predictive energy management are increasingly important to achieve the simultaneous goals of increased efficiency, reduced emissions, and sustainable economics. This paper presents two optimization strategies for the dispatch of a multi-chiller cooling plant with cold-water thermal storage. The optimizations aim to reduce both costs and emissions while considering real operational constraints of a plant. The UC Irvine campus micro-grid operation between January 2009 and December 2013 serves as a case study for how improved utilization of energy storage can buffer demand transients, reduce costs and improve plant efficiency. A predictive control strategy which forecasts campus demands from weather predictions, optimizes the plant dispatch, and applies feedback control to modify the plant dispatch in real-time is compared to best-practices manual operation. The dispatch optimization and predictive control algorithms are shown to reduce annual utility bill costs by 12.0%, net energy costs by 3.61%, and improve energy efficiency by 1.56%.

Dustin McLarty; Carles Civit Sabate; Jack Brouwer; Faryar Jabbari

2015-01-01T23:59:59.000Z

56

An analytical literature review of the available techniques for the protection of micro-grids  

Science Journals Connector (OSTI)

Abstract During the last decade, besides the rapid increase in the penetration level of Distributed Generation (DG) units of micro-grids, the connection of micro-grids as a developed technology to the existing distribution networks has also attracted much attention. One of the major challenges associated with the protection of micro-grids is to devise a proper protection strategy that is effective in the grid-connected as well as the islanded mode of operation. In order to deal with the challenge, many researchers have recently proposed various techniques. The purpose of the current study is to provide a comprehensive review of the available protection techniques that are applied to address micro-grid protection issues in both grid-connected and islanded mode. The most up to date relevant options are described and categorized into specific clusters. A comparative analysis is carried out in which the advantages and disadvantages to each technique are assessed. Lastly, after the appraisement of the existing protection techniques, some conclusions and suggestions are put forward for the protection of micro-grids in the future.

Sohrab Mirsaeidi; Dalila Mat Said; Mohd. Wazir Mustafa; Mohd. Hafiz Habibuddin; Kimia Ghaffari

2014-01-01T23:59:59.000Z

57

Micro-Grids for Colonias (OE 14.09) Kick-Off Meeting  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Micro-Grids for Colonias Micro-Grids for Colonias A Technology Development/Transfer Project Presentation to the DOE 2010 Smart Grid Peer Review Dean Schneider, Ph.D., PE Texas Center for Applied Technology Texas Engineering Experiment Station The Texas A&M University System d-schneider@tamu.edu The Problem * They call it "Luz Verde" - Colonias: Communities along the US - Mexico border lacking one or more essential services: water, wastewater, or electricity - Usually illegally subdivided - Small to large acreages - Low socioeconomic opportunities The Problem * Texas Model Subdivision Rules are in place to prevent additional Colonia development * Many residents economically cannot meet requirement in the near term A Solution * Install temporary micro-grid systems designed to provide essential levels of

58

Messdatenerfassung und Kommunikation im MICRO GRID eines industriellen Produktionsstandortes  

E-Print Network (OSTI)

Energiespeicher und eine ,,POWER TO GAS" -Anlage kompensiert werden. Die intelligente Koordination von Erzeugungs

Paderborn, Universität

59

Cost versus reliability sizing strategy for isolated photovoltaic micro-grids in the developing world  

Science Journals Connector (OSTI)

Abstract For many isolated regions in the developing world micro-grids which combine photovoltaic electricity generation and battery storage may represent the most reliable and least expensive form of energy service. Due to climate induced solar resource variations, achieving high reliability levels necessitates excess generation and storage capacity which can significantly increase the end consumer cost of energy. Due to severe financial limitations, many consumers in the developing world may prefer cost versus reliability trade-offs, as long as their basic energy needs are met. Defining reliability as the percent of electricity demand a grid can deliver, we utilize a time series energy balance algorithm at hourly resolution to create cost versus reliability curves of micro-grid performance. We then propose a micro-grid sizing strategy which enables designers with knowledge of local energy needs to determine the acceptability of potential micro-grids. Our strategy relies on visualizing simulation data at increasing levels of temporal resolution to determine where energy shortfalls occur and if they interfere with high priority energy demand. A case study is presented which utilizes the proposed methods. Results suggest that the methodology has the potential to reduce the cost of service while maintaining acceptable consumer reliability.

Mitchell Lee; Daniel Soto; Vijay Modi

2014-01-01T23:59:59.000Z

60

To grate a liquid into tiny droplets by its impact on a hydrophobic micro-grid F. Lapierre, F. Zoueshtiagh, V. Thomy, and A. Merlen  

E-Print Network (OSTI)

To grate a liquid into tiny droplets by its impact on a hydrophobic micro-grid P. Brunet, F (Dated: November 30, 2009) We report on experiments of drop impacting a hydrophobic micro-grid

Brunet, Philippe

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Vehicle to Micro-Grid: Leveraging Existing Assets for Reliable...  

NLE Websites -- All DOE Office Websites (Extended Search)

of Renewable & Distributed Energy Resources, December 6-10 , 2010 * Albuquerque, New Mexico U.S. military bases, such as Fort Carson, are interested in opportunities to lower...

62

Influence of Metal (Au, Ag) Micro-Grid on the Photocatalytic Activity of TiO2 Film  

Science Journals Connector (OSTI)

In this paper, we prepared TiO2...thin film with the surface modified by a connected Au micro-grid via a microsphere lithography strategy, and the...2 film. The photocatalytic activity improved as Au loading incr...

Chao Cai; Junying Zhang; Feng Pan; Weiwei Zhang; Hailing Zhu…

2008-06-01T23:59:59.000Z

63

Three fault ride through controllers for wind systems running in isolated micro-grid and Effects of fault type on their performance: A review and comparative study  

Science Journals Connector (OSTI)

Abstract This paper presents survey about Fault Ride Through (FRT) techniques and controllers which employed with all wind generation system types. After presenting a comprehensive FRT survey, paper proposes three Fault Ride Through (FRT) controllers for keeping stability of Fixed Speed Wind Generation (FSWG) system serving in isolated Micro-Grid (MG). The first controller has been implemented by inserting Superconductor Fault Current Limiter (SFCL) in series with wind generator terminals during fault instant. The second proposed FRT controller is modifying the conventional Pitch Angle Controllers (PAC) to can spill and reduce high percentage of extracted mechanical wind power during and subsequent fault occurrence which in turns help stability improvement and restoration. Third FRT technique is performed by adapting the wind turbine gearbox ratio which forces the wind generation system to run far from the maximum power point. The best performance is obtained with the SFCL controller. Superior results are obtained when the three proposed FRT controllers are employed simultaneously. The three developed FRT controllers are simple, reliable and economical attractive. Effects of fault type on SFCL FRT controller performance are analyzed and investigated in details. The proposed SFCL FRT controller has been tested under single phase, double phase, phase to phase, and three phases to ground faults. Results display that the three phases to ground fault is the most severe type on SFCL FRT performance from stability point of view. On the other hand, double phase to ground fault is the most severe one from fluctuations and oscillations points of view. Parameters of the SFCL must be adjusted based on the three phases to ground fault. If the SFCL FRT controller is designed to can deal with three phases fault, it sure can deal with the other fault types successfully.

Rashad M. Kamel

2014-01-01T23:59:59.000Z

64

To grate a liquid into tiny droplets by its impact on a hydrophobic micro-grid  

E-Print Network (OSTI)

We report on experiments of drop impacting a hydrophobic micro-grid, of typical spacing a few tens of $\\mu$m. Above a threshold in impact speed, liquid emerges to the other side, forming micro-droplets of size about that of the grid holes. We propose a method to produce either a mono-disperse spray or a single tiny droplet of volume as small as a few picoliters corresponding to a volume division of the liquid drop by a factor of up to 10$^5$. We also discuss the discrepancy of the measured thresholds with that predicted by a balance between inertia and capillarity.

Brunet, P; Zoueshtiagh, F; Thomy, V; Merlen, A

2009-01-01T23:59:59.000Z

65

Effect of wind generation system types on Micro-Grid (MG) fault performance during both standalone and grid connected modes  

Science Journals Connector (OSTI)

Abstract Recently, there are three wind generation (WG) system types. The first type is called Fixed Speed Wind Generation (FSWG) system, which employs squirrel cage induction generators. Double Fed Induction Generator (DFIG) is utilized in the second type. The third type is called Full Converter Wind Generation (FCWG) system, which is interfaced with Micro-Grid (MG) through a back to back converter. During fault occurrence, each WG has its performance and characteristics which are determined by the generator physical characteristics and the MG earthing system configuration. For some WG types, the fault current depends also on the control algorithm of the power converter. The main target of this paper is to investigate and estimate how the fault performance of MG during both standalone and grid-connected modes is influenced by the type of WG. It is found during standalone mode that the type of the employed WG has a dominant impact on the MG performance under fault disturbance. On the contrary, the type of the employed WG has a negligible effect on the MG fault performance during grid-connected mode. This is because the main grid contributes most of the fault current. Effects of earthing system type on MG performance are highlighted.

Rashad M. Kamel

2014-01-01T23:59:59.000Z

66

Optimal energy management of a micro-grid with renewable energy resources and demand response  

Science Journals Connector (OSTI)

With the introduction of smart energy grids and extensive penetration of renewable energy resources in distribution networks Micro-Grids (MGs) which are comprised of various alternative energy resources and Advanced Metering Infrastructure (AMI) systems for better implementation of DR programs are effectively employed. The design and development of Smart Energy Management Systems (SEMSs) for MGs are interesting and attractive research problems. In this paper a new SEMS architecture is presented to solve the multi-objective operation management and scheduling problem in a typical MG while considering different energy resource technologies Plug-in Hybrid Electric Vehicles (PHEVs) and DR programs. The energy management problem is formulated as a constrained mixed integer nonlinear multi-objective optimization problem in which the MG's total operating cost and net emissions must be minimized simultaneously. Three different optimization algorithms are used to solve the above mentioned problem and their outputs (Pareto optimal solutions) for the same problem are compared and analyzed.

M. Parvizimosaed; F. Farmani; A. Anvari-Moghaddam

2013-01-01T23:59:59.000Z

67

Regenerative air energy storage for remote wind–diesel micro-grid communities  

Science Journals Connector (OSTI)

Abstract Remote communities beyond the reach of conventional electricity grids primarily rely on diesel generators (DG) to supply electricity. The systems in these communities are costly to operate because of the high price of transporting diesel to remote areas, and the low overall efficiencies caused by part-load operation of the DG. There is increasing interest to use wind energy converters (WEC) to supplement DG, thereby lowering the fuel consumption and operating costs. In order to use WEC to reduce the economic and environmental burden that DG have on remote communities, an energy storage system can be incorporated to buffer both generation and demand. This can avoid curtailment of the WEC, operate the DG at optimal efficiency, and reduce the necessary maximum installed generator capacities. Regenerative air energy storage (RAES) is a form of compressed air storage that is suitable for deployment in remote communities due to its ability to utilize waste heat from DG to boost the roundtrip efficiency of energy storage. This article presents a numerical model for a RAES system operating in a wind-diesel micro-grid. Simulations are run for varying WEC penetration levels and RAES energy capacities. The results show that in systems with WEC penetration less than 75%, increasing WEC capacity is more economic than adding a RAES system. Above penetration rates of 75%, the use of RAES achieves increased diesel savings with only slightly longer payback than simple wind-diesel systems. In the remote Canadian community case study, the optimal RAES system is 0.5 MW and 1 MW h with a WEC penetration rate of approximately 75%. A larger RAES results in further fuel savings, and thus environmental benefit, with only marginal increase in simple payback period.

Sebastian C. Manchester; Lukas G. Swan; Dominic Groulx

2014-01-01T23:59:59.000Z

68

Employing two novel mechanical fault ride through controllers for keeping stability of fixed speed wind generation systems hosted by standalone micro-grid  

Science Journals Connector (OSTI)

Abstract This paper proposes and designs two novels Fault Ride Through (FRT) controllers for maintaining Fixed Speed Wind Generation system (FSWGs) stability during fault events. The first technique has been implemented by increasing the wind turbine blade pitch angle with maximum possible rate to reduce the mechanical extracted wind power and consequently suppress wind generation system acceleration. The second FRT technique has been verified by adapting gear ratio of wind generation system to run far from optimum maximum power point and help FRT process. Effectiveness of the two proposed FRT techniques has been proven by accurate simulation of the most severe disturbance conditions. Also, Results indicated that second technique gives faster response than the first one. Without employing any FRT technique, \\{FSWGs\\} cannot keep its stability and the standalone Micro-Grid (MG) transfers to the blackout mode. Implementation the two FRT techniques requires no additional hardware. Only, control algorithms need little modification to deal with fault event and help FRT process. This fact makes the two proposed FRT techniques are simple, practical and highly economical attractive.

Rashad M. Kamel

2014-01-01T23:59:59.000Z

69

Synthesis of Droop-Based Distributed Generators in a Micro Grid System  

Science Journals Connector (OSTI)

Distributed Generation (DG) systems are being increasingly favored for meeting the ever-growing demands of electrical energy and smart grids. Today’s DG technologies include energy sources such as conventional...

Mahesh S. Illindala

2012-01-01T23:59:59.000Z

70

Modellierung der regelbaren Quellen, Lasten und Speicher im MICRO GRID eines industriellen Produktionsstandortes fr die Lastflussbe-  

E-Print Network (OSTI)

,,POWER TO GAS" -Anlage kompensiert werden. Die intelligente Koordination von Erzeugungs- und Regelverhalten der Solar- Wechselrichter, des Batteriespeichers und der POWER TO GAS ­ Einheit in einer

Paderborn, Universität

71

Wirtschaftliche Bereitstellung von Netzdienstleistungen durch das MICRO GRID eines industriellen Produktionsstandortes  

E-Print Network (OSTI)

GRID angeschlossenen elektrischen Energiespeicher und eine ,,POWER TO GAS" -Anlage kompensiert werden

Paderborn, Universität

72

An Improved Particle Swarm Optimization and Its Application for Micro-grid Economic Operation Optimization  

Science Journals Connector (OSTI)

A particle swarm optimization algorithm based on adaptive mutation and P systems is proposed to overcome trapping in local optimum solution and low optimization precision in this paper. At the same time, the prop...

Tao Liu; Jun Wang; Zhang Sun; Juan Luo…

2014-01-01T23:59:59.000Z

73

Development of a thermal and electrical energy management in residential building micro-grid  

Science Journals Connector (OSTI)

Global warming and pressing concern about CO2 emission along with increasing fuel and oil cost have brought about great challenges for energy companies and homeowners. In this regard a potential candidate solution is widely used for Distributed Energy Resources which are capable of providing high quality low-cost heat and power to off-grid or remote facilities. To appropriately manage thermal and electrical energy a Smart Energy Management System (SEMS) with hierarchical control scheme has been presented. The developed SEMS model results in mixed integer non-linear programming optimization problem with the objective function of minimizing the operation cost as well as considering emissions. Moreover the optimization problem has been solved for deterministic and stochastic scheduling algorithms. The novelty of this work is basically reliant on using data mining approach to reduce forecasting error. Several case studies have been carried out to evaluate the performance of proposed data mining method on both energy cost and expected cost.

B. Vahidi

2014-01-01T23:59:59.000Z

74

Improving Energy Use Forecast for Campus Micro-grids using Indirect Indicators Department of Computer Science  

E-Print Network (OSTI)

.32%, and a reduction in error from baseline models by up to 53%. Keywords-energy forecast models; energy informatics I that physically char- acterize a building, or are based on measured building performance data. Smart meters have analysis and machine learning methods can be used to mine sensor data and extract forecast models

Prasanna, Viktor K.

75

Towards understanding the benefits and challenges of Smart/Micro-Grid for electricity supply system in Nigeria  

Science Journals Connector (OSTI)

Abstract The poor state of electricity supply system in Nigeria is threatening the welfare and security of life and properties of millions of individuals with adverse economic consequences for the country. The inadequacy of the national grid, especially the inability of the electricity generation capacity to match increasing demand in the country has led to increasing agitation for increased penetration of renewable energy sources (RESs) into the electricity supply mix. While great attention has been focused on the potential of \\{RESs\\} for electricity generation in the country, little or no attention has been given to the application of Smart/Micro-Grid (SM-G) technologies to the ageing Nigeria grid infrastructures and electrification of the rural areas. The aim of this paper is to bring into focus the benefits and challenges of enabling SM-G in the electricity supply system in Nigeria. SM-G will bring benefits to the electricity stakeholders in form of improvements in reliability, efficiency, economics, environment, security and safety. The paper gives an overview and reviews the current state of the electricity supply system in the country. It discusses the SM-G concepts and associated technologies, and highlights how they can help address the electricity problems in the country. The challenges of applying these concepts in Nigeria context are also discussed. Enabling SM-G in the country will not only lead to improvement in the quality, efficiency and reliability of the electricity grid, but also promote the provision of electricity supply to the remote rural areas using RESs.

Joseph O. Dada

2014-01-01T23:59:59.000Z

76

248 IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 20, NO. 1, JANUARY 2005 Micro-Grid Autonomous Operation During  

E-Print Network (OSTI)

energy cost, and rapid technological developments of Manuscript received March 11, 2003; revised May 31, low-head hydro units and geothermal systems and ii) battery storage, capacitor storage, low- and high-speed flywheel systems and Supercon- ducting Magnetic Energy Storage (SMES) systems. While only DG units

Lehn, Peter W.

77

Multi-Agent Based Techniques for Coordinating the Distribution of Electricity in a Micro-Grid Environment  

E-Print Network (OSTI)

vehicles, to ultra-low carbon vehicles (ULCV) such as hybrids, electric vehicles and hydrogen fuel cell. 2 Background Research To reduce carbon emissions and ensure that the UK low car- bon emissions plan to the current national grid, the in- creasing demand for electricity will only result in more car- bon emissions

Southampton, University of

78

Integrating renewables economic dispatch with demand side management in micro-grids: a genetic algorithm-based approach  

Science Journals Connector (OSTI)

Economic dispatch and demand side management are two of the most important tools for efficient energy management in the grid. It is a casual ... aiming to optimize economic dispatch have implications for demand side

Ahmer Arif; Fahad Javed; Naveed Arshad

2014-04-01T23:59:59.000Z

79

2004 Power Marketing Plan - Base Resource Overview  

NLE Websites -- All DOE Office Websites (Extended Search)

Contract Overview Contract Overview 08/16/00 1 of 3 2004 Power Marketing Plan Base Resource Contract Overview The following summarizes the main provisions of the Base Resource Contract: Section 4 (Termination of amendment for right to purchase after 2004): * Terminates the existing contract amendments that provide for a customer's right to purchase power from Western after 2004. Execution of the Base Resource contract sustains a customer's right to purchase after 2004. Section 5 (Effective date and term of contract): Provides for: * Base Resource contracts to be effective upon execution by Western. * Base Resource contracts to remain in effect until December 31, 2024, subject to prior termination. * Service to begin under the Base Resource contract on January 1, 2005. Section 7 (Base Resource estimates and availability forecast):

80

Encouraging Combined Heat and Power in California Buildings  

E-Print Network (OSTI)

of Commercial-Building Micro-grids,” IEEE Transactions onEffects of Carbon Tax on Micro-grid Combined Heat and Powerin this work, picks optimal micro-grid 3 /building equipment

Stadler, Michael

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

,"Projected Year Base","Year","Summer",,,"Eastern Power Grid...  

U.S. Energy Information Administration (EIA) Indexed Site

2009 " ,"(Megawatts and Percent)" ,"Projected Year Base","Year","Summer",,,"Eastern Power Grid",,,"Texas Power Grid",,,"Western Power Grid" ,,,"Contiguous...

82

,"Projected Year Base","Year","Summer",,,"Eastern Power Grid...  

U.S. Energy Information Administration (EIA) Indexed Site

2008 " ,"(Megawatts and Percent)" ,"Projected Year Base","Year","Summer",,,"Eastern Power Grid",,,"Texas Power Grid",,,"Western Power Grid" ,,,"Contiguous...

83

Wireless electricity (Power) transmission using solar based power satellite technology  

Science Journals Connector (OSTI)

In the near future due to extensive use of energy, limited supply of resources and the pollution in environment from present resources e.g. (wood, coal, fossil fuel) etc, alternative sources of energy and new ways to generate energy which are efficient, cost effective and produce minimum losses are of great concern. Wireless electricity (Power) transmission (WET) has become a focal point as research point of view and nowadays lies at top 10 future hot burning technologies that are under research these days. In this paper, we present the concept of transmitting power wirelessly to reduce transmission and distribution losses. The wired distribution losses are 70 – 75% efficient. We cannot imagine the world without electric power which is efficient, cost effective and produce minimum losses is of great concern. This paper tells us the benefits of using WET technology specially by using Solar based Power satellites (SBPS) and also focuses that how we make electric system cost effective, optimized and well organized. Moreover, attempts are made to highlight future issues so as to index some emerging solutions.

M Maqsood; M Nauman Nasir

2013-01-01T23:59:59.000Z

84

CX-004241: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Laboratory Purpose of this project is to fully develop prototype renewable based micro-grid power systems for communities (colonias) in the USMexico border region to supply...

85

CX-004242: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Laboratory Purpose of this project is to fully develop prototype renewable based micro-grid power systems for communities (colonias) in the USMexico border region to supply...

86

Lunar Base Thermoelectric Power Station Study  

Science Journals Connector (OSTI)

Under NASA’s Project Prometheus the Nuclear Space Power Systems Program the Jet Propulsion Laboratory Pratt & Whitney Rocketdyne and Teledyne Energy Systems have teamed with a number of universities under the Segmented Thermoelectric Multicouple Converter (STMC) Task to develop the next generation of advanced thermoelectric converters for space reactor power systems. Work on the STMC converter assembly has progressed to the point where the lower temperature stage of the segmented multicouple converter assembly is ready for laboratory testing and promising candidates for the upper stage materials have been identified and their properties are being characterized. One aspect of the program involves mission application studies to help define the potential benefits from the use of these STMC technologies for designated NASA missions such as a lunar base power station where kilowatts of power would be required to maintain a permanent manned presence on the surface of the moon. A modular 50 kWe thermoelectric power station concept was developed to address a specific set of requirements developed for this particular mission concept. Previous lunar lander concepts had proposed the use of lunar regolith as in?situ radiation shielding material for a reactor power station with a one kilometer exclusion zone radius to minimize astronaut radiation dose rate levels. In the present concept we will examine the benefits and requirements for a hermetically?sealed reactor thermoelectric power station module suspended within a man?made lunar surface cavity. The concept appears to maximize the shielding capabilities of the lunar regolith while minimizing its handling requirements. Both thermal and nuclear radiation levels from operation of the station at its 100?m exclusion zone radius were evaluated and found to be acceptable. Site preparation activities are reviewed as well as transport issues for this concept. The goal of the study was to review the entire life cycle of the unit to assess its technical problems and technology needs in all areas to support the development deployment operation and disposal of the unit.

William Determan; Patrick Frye; Jack Mondt; Jean?Pierre Fleurial; Ken Johnson; Gerhard Stapfer; Michael Brooks; Ben Heshmatpour

2006-01-01T23:59:59.000Z

87

Lunar Base Thermoelectric Power Station Study  

SciTech Connect

Under NASA's Project Prometheus, the Nuclear Space Power Systems Program, the Jet Propulsion Laboratory, Pratt and Whitney Rocketdyne, and Teledyne Energy Systems have teamed with a number of universities, under the Segmented Thermoelectric Multicouple Converter (STMC) Task, to develop the next generation of advanced thermoelectric converters for space reactor power systems. Work on the STMC converter assembly has progressed to the point where the lower temperature stage of the segmented multicouple converter assembly is ready for laboratory testing, and promising candidates for the upper stage materials have been identified and their properties are being characterized. One aspect of the program involves mission application studies to help define the potential benefits from the use of these STMC technologies for designated NASA missions such as a lunar base power station where kilowatts of power would be required to maintain a permanent manned presence on the surface of the moon. A modular 50 kWe thermoelectric power station concept was developed to address a specific set of requirements developed for this particular mission concept. Previous lunar lander concepts had proposed the use of lunar regolith as in-situ radiation shielding material for a reactor power station with a one kilometer exclusion zone radius to minimize astronaut radiation dose rate levels. In the present concept, we will examine the benefits and requirements for a hermetically-sealed reactor thermoelectric power station module suspended within a man-made lunar surface cavity. The concept appears to maximize the shielding capabilities of the lunar regolith while minimizing its handling requirements. Both thermal and nuclear radiation levels from operation of the station, at its 100-m exclusion zone radius, were evaluated and found to be acceptable. Site preparation activities are reviewed as well as transport issues for this concept. The goal of the study was to review the entire life cycle of the unit to assess its technical problems and technology needs in all areas to support the development, deployment, operation and disposal of the unit.

Determan, William; Frye, Patrick [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109 (United States); Mondt, Jack; Fleurial, Jean-Pierre; Johnson, Ken; Stapfer, Gerhard [Pratt and Whitney Rocketdyne Inc., P.O. Box 7922, Canoga Park, CA 91309 (United States); Brooks, Michael; Heshmatpour, Ben [Teledyne Energy Systems, Inc., 10707 Gilroy Rd, Hunt Valley, MD 21031 (United States)

2006-01-20T23:59:59.000Z

88

Failure analysis on China power grid based on power law  

Science Journals Connector (OSTI)

This paper is concerned with the mechanism of blackouts in China power system from the viewpoint of self-organized criticality. By using two estimation algorithms of scaled window variance (SWV) and rescaled r...

Xiaofeng Weng; Yiguang Hong; Ancheng Xue…

2006-08-01T23:59:59.000Z

89

Plug and Play Distributed Power Systems for Smart-Grid Connected Building |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Emerging Technologies » Plug and Play Distributed Power Systems Emerging Technologies » Plug and Play Distributed Power Systems for Smart-Grid Connected Building Plug and Play Distributed Power Systems for Smart-Grid Connected Building The U.S. Department of Energy (DOE) is currently conducting research into plug-and-play distributed power systems for smart- grid connected buildings. Project Description This project seeks to advance and demonstrate a plug-and-play building energy micro-grid concept for integrating energy storage, loads, and sources at the building level with the external utility grid. The micro-grid demonstration is expected to include the following: Diesel synchronous generator Energy storage device Otis regenerative elevator system representing building critical loads Smart interface with the utility grid

90

A Self-Powered Acetaldehyde Sensor Based on Biofuel Cell  

Science Journals Connector (OSTI)

A Self-Powered Acetaldehyde Sensor Based on Biofuel Cell ... BFCs can directly harvest energy from ambient biofuels as green energy sources, which could lead to their application as simple, flexible, and portable power sources. ...

Lingling Zhang; Ming Zhou; Shaojun Dong

2012-11-05T23:59:59.000Z

91

Development of Power-head based Fan Airflow Station  

E-Print Network (OSTI)

Development of Power-head Based Fan Airflow Station Gang Wang Research associate University of Nebraska, Lincoln Mingsheng Liu Professor University of Nebraska, Lincoln Abstract Fan airflow measurement is critical for heating... under partial loads. On the other hand, in most of airflow range, the power curve varies exquisitely. Wang and Liu developed the VFD airflow station to obtain the fan airflow using the power and speed based on the power curve. Both the fan...

Wang, G.; Liu, M.

2005-01-01T23:59:59.000Z

92

A study of small-scale energy networks of the Japanese Syowa Base in Antarctica by distributed engine generators  

Science Journals Connector (OSTI)

Abstract Fuel traffic to the Syowa Base of the South Pole is increasing from Japan, with growing research and observation occurring every year. Limits to fuel traffic and the spread of green energy utilization are topics of interest for Syowa Base; this research considers the construction of a Syowa Base small-scale energy network (Syowa Base Micro-Grid: SBMG) for the purposes of reducing fuel consumption and increasing green energy utilization. The number of engine generators, the operation plan for the battery’s charge and discharge, and the introduction of an exhaust heat pump provided a means by which the load factor of the engine generator could be maintained high value from the fluctuations of green energy. This might be accomplished by modifying the main power supply of Syowa Base into a distributed power supply system rather than a conventional central power supply system. The relationship between the amount of green energy (photovoltaics and wind power generation) connected to the proposed power supply distribution and the amount of fuel consumed by the engine generators and backup boiler was clarified. Moreover, the outside temperatures, insulation levels, and wind velocity at the Syowa Base change seasonally, resulting in large changes in the SBMG operation method. Therefore, differences in the operation methods between the proposed power supply distribution system and the conventional central power supply were assessed during the summer (January), winter (July), and mid-season (October), and the resulting differences in fuel consumption were clarified.

Shin’ya Obara; Yuta morizane; Jorge Morel

2013-01-01T23:59:59.000Z

93

Orbits design for Leo space based solar power satellite system.  

E-Print Network (OSTI)

?? Space Based Solar Power satellites use solar arrays to generate clean, green, and renewable electricity in space and transmit it to earth via microwave,… (more)

Addanki, Neelima Krishna Murthy

2011-01-01T23:59:59.000Z

94

Incremental Partitioning-Based Vectorless Power Grid Verification  

E-Print Network (OSTI)

Incremental Partitioning-Based Vectorless Power Grid Verification Dionysios Kouroussis Department performance of a chip, design verification of the power grid is of critical importance. This paper builds the efficient verification of local power grid sections or blocks, enabling incremen- tal design analysis

Najm, Farid N.

95

Complex Network Framework Based Dependency Matrix of Electric Power Grid  

E-Print Network (OSTI)

Complex Network Framework Based Dependency Matrix of Electric Power Grid A. B. M. Nasiruzzaman, H scale analysis of power grid using complex network framework a network matrix is formed. The elements. INTRODUCTION Power grid is one of the most complex man made in- frastructures of modern day. For example

Pota, Himanshu Roy

96

Fast Algorithms for Power Grid Analysis Based on Effective Resistance  

E-Print Network (OSTI)

Fast Algorithms for Power Grid Analysis Based on Effective Resistance Selc¸uk K¨ose and Eby G method significantly outperforms previously proposed power grid analysis techniques in terms and the impedance of the power grid. The effective resistance between any two nodes in a uniform grid structure has

Friedman, Eby G.

97

Propeller based human powered swimming device  

E-Print Network (OSTI)

Currently the only human powered swimming device widely sold on the market are swim flippers. However, flippers are not efficient for the human body, and there is a potential to increase the speed while swimming with a ...

Bunker, Kristine (Kristine Alina)

2014-01-01T23:59:59.000Z

98

78 IEEE power & energy magazine july/august 2007 by Nikos Hatziargyriou,  

E-Print Network (OSTI)

of islanding. Micro- grid design and operation demand new skills and technology, while distribution systems

Hu, Fei

99

Major Environmental Aspects of Gasification-Based Power Generation Technologies  

NLE Websites -- All DOE Office Websites (Extended Search)

Detailed Evaluation of the Environmental Performance of Gasification-Based Power Systems Detailed Evaluation of the Environmental Performance of Gasification-Based Power Systems DECEMBER 2002 U.S. DOE/NETL 2-1 2. DETAILED EVALUATION OF THE ENVIRONMENTAL PERFORMANCE OF GASIFICATION-BASED POWER SYTEMS 2.1 Introduction and Summary of Information Presented The single most compelling reason for utilities to consider coal gasification for electric power generation is superior environmental performance. 1 As shown in Figure 2-1, gasification has fundamental environmental advantages over direct coal combustion. Commercial-scale plants for both integrated gasification combined cycle (IGCC) electric power generation and chemicals applications have already successfully demonstrated these advantages. The superior environmental capabilities of coal gasification apply to all three areas of concern: air emissions,

100

Model Based Spatial Data Mining for Power Markets Jiangzhuo Chen  

E-Print Network (OSTI)

of load serving substations. We use peak power demand data from FERC and a de- tailed synthetic populationModel Based Spatial Data Mining for Power Markets Jiangzhuo Chen V.S. Anil Kumar Achla Marathe Karla Atkins 1 Introduction In this paper, we use model-driven data mining tech- niques to address

Bailey-Kellogg, Chris

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Breakout Session: Solar as a Base Load Power Source  

Energy.gov (U.S. Department of Energy (DOE))

Does solar have a future as a base load electricity source? This session explores a vision in which solar power plants can provide dispatchability, predictability, and reliability comparable to...

102

Power System Load Forecasting Based on EEMD and ANN  

Science Journals Connector (OSTI)

In order to fully mine the characteristics of load data and improve the accuracy of power system load forecasting, a load forecasting model based on Ensemble Empirical Mode ... is proposed in this paper. Firstly,...

Wanlu Sun; Zhigang Liu; Wenfan Li

2011-01-01T23:59:59.000Z

103

Analysis of silicon carbide based semiconductor power devices and their application in power factor correction  

E-Print Network (OSTI)

cannot handle. The requirements include higher blocking voltages, switching frequencies, efficiency, and reliability. Material technologies superior to Si are needed for future power device developments. Silicon Carbide (SiC) based semiconductor devices...

Durrani, Yamin Qaisar

2005-11-01T23:59:59.000Z

104

MIMO, x, w Unobserved, w ? 0 Exogenously Generated  

Science Journals Connector (OSTI)

A power micro-grid comprises three generators connected as shown in...8.2. Fig. 8.2 Power micro-grid ...

Paolo Caravani

2013-01-01T23:59:59.000Z

105

MARKET-BASED ADVANCED COAL POWER SYSTEMS FINAL REPORT  

NLE Websites -- All DOE Office Websites (Extended Search)

MARKET-BASED ADVANCED MARKET-BASED ADVANCED COAL POWER SYSTEMS FINAL REPORT MAY 1999 DOE/FE-0400 U.S. Department of Energy Office of Fossil Energy Washington, DC 20585 Market-Based Advanced Coal Power Systems 1-1 December 1998 1. INTRODUCTION As deregulation unfolds and privatization of the utility market takes shape, priorities for power plant economics have shifted toward those of a "bottom-line" business and away from a regulated industry. Competition in utility generation and the exposure risks of large capital investments have led to a preference to minimize capital costs and fixed and variable operation and maintenance costs. With global competition from independent power producers (IPPs), non- utility generators, and utilities, the present trend of investments is with conventional pulverized

106

Spin-on-doping for output power improvement of silicon nanowire array based thermoelectric power generators  

SciTech Connect

The output power of a silicon nanowire array (NWA)-bulk thermoelectric power generator (TEG) with Cu contacts is improved by spin-on-doping (SOD). The Si NWAs used in this work are fabricated via metal assisted chemical etching (MACE) of 0.01–0.02 ? cm resistivity n- and p-type bulk, converting ?4% of the bulk thickness into NWs. The MACE process is adapted to ensure crystalline NWs. Current-voltage and Seebeck voltage-temperature measurements show that while SOD mainly influences the contact resistance in bulk, it influences both contact resistance and power factor in NWA-bulk based TEGs. According to our experiments, using Si NWAs in combination with SOD increases the output power by an order of 3 under the same heating power due to an increased power factor, decreased thermal conductivity of the NWA and reduced Si-Cu contact resistance.

Xu, B., E-mail: bin.xu09@imperial.ac.uk; Fobelets, K. [Department of Electrical and Electronic Engineering, Imperial College London, Exhibition Road, SW7 2BT London (United Kingdom)

2014-06-07T23:59:59.000Z

107

Environmental Analysis of the Coal-based Power Production with Amine-based Carbon Capture  

E-Print Network (OSTI)

Environmental Analysis of the Coal-based Power Production with Amine-based Carbon Capture J. To capture carbon dioxide from fossil fuel power plants and to store it in geological formations (CCS at the beginning. From an electricity generator's perspective the amine based carbon capture offers some advantages

108

Optimal Demand Response Based on Utility Maximization in Power Networks  

E-Print Network (OSTI)

Optimal Demand Response Based on Utility Maximization in Power Networks Na Li, Lijun Chen different appliances including PHEVs and batteries and propose a demand response approach based on utility. The utility company can thus use dynamic pricing to coordinate demand responses to the benefit of the overall

Low, Steven H.

109

Regression-Based RTL Power Modeling ALESSANDRO BOGLIOLO  

E-Print Network (OSTI)

introduce a low overhead on-line characterization method for enhancing the accuracy of off-line estimation is a key feature for synthesis-based design flows. The main challenge in establishing a sound RTL-up off-line characterization of regression-based power macromodels is discussed in detail. Moreover, we

De Micheli, Giovanni

110

Major Environmental Aspects of Gasification-Based Power Generation Technologies  

NLE Websites -- All DOE Office Websites (Extended Search)

Detailed Detailed Evaluation of the Environmental Performance of Gasification-Based Power Systems DECEMBER 2002 U.S. DOE/NETL 2-1 2. DETAILED EVALUATION OF THE ENVIRONMENTAL PERFORMANCE OF GASIFICATION-BASED POWER SYTEMS 2.1 Introduction and Summary of Information Presented The single most compelling reason for utilities to consider coal gasification for electric power generation is superior environmental performance. 1 As shown in Figure 2-1, gasification has fundamental environmental advantages over direct coal combustion. Commercial-scale plants for both integrated gasification combined cycle (IGCC) electric power generation and chemicals applications have already successfully demonstrated these advantages. The superior environmental capabilities of coal gasification apply to all three areas of concern: air emissions, water discharges, and solid

111

BPA 20-year power subscription Q. Should DSIs receive cost-based power from BPA after 2006? If so, how  

E-Print Network (OSTI)

BPA 20-year power subscription � Q. Should DSIs receive cost-based power from BPA after 2006? If so, how much? � A. DSI's should not receive firm, cost-based federal power from BPA after 2006. BPA customers. BPA sales of federal power to the DSI's, if any, should not increase costs to preference

112

Base drive circuit for a four-terminal power Darlington  

DOE Patents (OSTI)

A high power switching circuit which utilizes a four-terminal Darlington transistor block to improve switching speed, particularly in rapid turn-off. Two independent reverse drive currents are utilized during turn off in order to expel the minority carriers of the Darlington pair at their own charge sweep-out rate. The reverse drive current may be provided by a current transformer, the secondary of which is tapped to the base terminal of the power stage of the Darlington block. In one application, the switching circuit is used in each power switching element in a chopper-inverter drive of an electric vehicle propulsion system.

Lee, Fred C. (Blacksburg, VA); Carter, Roy A. (Salem, VA)

1983-01-01T23:59:59.000Z

113

Optimal Power Flow Based Demand Response Offer Price Optimization  

E-Print Network (OSTI)

Optimal Power Flow Based Demand Response Offer Price Optimization Zhen Qiu 1 Introduction-time energy balance. Demand response programs are offered by the utility companies to reduce the load response cost in exchange for load reduction. A considerable amount of papers have discussed the demand

Lavaei, Javad

114

Transaction Based Power Flow Analysis For Transmission Utilization Allocation  

E-Print Network (OSTI)

allocation rules for cross terms are proposed to hedge firm or existing transactions against market risk markets (PX) and bilateral contract transactions (BC) share the same transmission system, and their ownTransaction Based Power Flow Analysis For Transmission Utilization Allocation Garng Huang, Senior

115

Impact of wind power on generation economy and emission from coal based thermal power plant  

Science Journals Connector (OSTI)

The major chunk of power generation is based on coal fueled thermal power plant. Due to increasing demand of power there will be future crises of coal reservoirs and its costing. Apart from this, coal based thermal power plant is the main source of environmental emissions like carbon dioxides (CO2), sulfur dioxides (SO2) and oxides of nitrogen (NOx) which not only degrades the air quality but also is responsible for global warming, acid rain etc. This paper proposes a combined working of Doubly Fed Induction Generator (DFIG) with coal based Synchronous Generator (SG) in the MATLAB environment. STATCOM is suggested at common coupling point to maintain voltage stability and also maintain the system in synchronism. Analysis have been made for environmental emissions, coal requirement and system economy for both the cases, when the total load supplied by only SG and with the combination. Emission analysis have been also made with the application of washed coal in SG. With the impact of DFIG energy generation from SG have been reduces which proportionally affects on coal requirement, generation cost and environmental emissions. Application of washed coal improves the performance of SG and also reduces the environmental emissions.

K.B. Porate; K.L. Thakre; G.L. Bodhe

2013-01-01T23:59:59.000Z

116

The virtual digital nuclear power plant: A modern tool for supporting the lifecycle of VVER-based nuclear power units  

Science Journals Connector (OSTI)

The article describes the “Virtual Digital VVER-Based Nuclear Power Plant” computerized system comprising a totality of verified ... a model intended for describing the behavior of nuclear power plant (NPP) syste...

G. V. Arkadov; A. P. Zhukavin; A. E. Kroshilin; I. A. Parshikov…

2014-10-01T23:59:59.000Z

117

Observer-based control of a tethered wing wind power system: indoor real-time experiment  

E-Print Network (OSTI)

Observer-based control of a tethered wing wind power system: indoor real-time experiment Ahmad, a novel wind power system based on a tethered wing is presented. An observer-based control strategy WindPower, Joby energy [8] or Makani Power [9], is composed of one or several airborne wind turbines

Paris-Sud XI, Université de

118

Performance of Networked Control Systems under Sporadic Feedback  

E-Print Network (OSTI)

Regenerative Braking power inverter storage Micro-Grid Renewable Generation PHEV Smart Grid - Distributed

Lemmon, Michael

119

Low-temperature fuel cell systems for commercial airplane auxiliary power.  

SciTech Connect

This presentation briefly describes the ongoing study of fuel cell systems on-board a commercial airplane. Sandia's current project is focused on Proton Exchange Membrane (PEM) fuel cells applied to specific on-board electrical power needs. They are trying to understand how having a fuel cell on an airplane would affect overall performance. The fuel required to accomplish a mission is used to quantify the performance. Our analysis shows the differences between the base airplane and the airplane with the fuel cell. There are many ways of designing a system, depending on what you do with the waste heat. A system that requires ram air cooling has a large mass penalty due to increased drag. The bottom-line impact can be expressed as additional fuel required to complete the mission. Early results suggest PEM fuel cells can be used on airplanes with manageable performance impact if heat is rejected properly. For PEMs on aircraft, we are continuing to perform: (1) thermodynamic analysis (investigate configurations); (2) integrated electrical design (with dynamic modeling of the micro grid); (3) hardware assessment (performance, weight, and volume); and (4) galley and peaker application.

Curgus, Dita Brigitte; Pratt, Joseph William; Akhil, Abbas Ali; Klebanoff, Leonard E.

2010-11-01T23:59:59.000Z

120

Fuel-cell based power generating system having power conditioning apparatus  

DOE Patents (OSTI)

A power conditioner includes power converters for supplying power to a load, a set of selection switches corresponding to the power converters for selectively connecting the fuel-cell stack to the power converters, and another set of selection switches corresponding to the power converters for selectively connecting the battery to the power converters. The power conveners output combined power that substantially optimally meets a present demand of the load.

Mazumder, Sudip K. (Chicago, IL); Pradhan, Sanjaya K. (Des Plaines, IL)

2010-10-05T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

NETL F 451.1-1/1 Categorical Exclusion (CX) Designation Form  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

(TX) OE 14.09 Purpose of this project is to fully develop prototype renewable based micro-grid power systems for communities (colonias) in the USMexico border region to supply...

122

CX-003161: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Laboratory The purpose of this project is to fully develop prototype renewable based micro-grid power systems for communities (colonias) in the United StatesMexico border region...

123

CX-003157: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Laboratory The purpose of this project is to fully develop prototype renewable based micro-grid power systems for communities (colonias) in the United StatesMexico border region...

124

Power Dispatch Communication Training Based on Multimedia Animation  

Science Journals Connector (OSTI)

The electric power communication network ensures the safe and stable operation of the power system and it is known as the one of the three most important guarantees of power system security and stability. Additio...

Ying Wang; Bingbing Liao; Ying Zeng…

2013-01-01T23:59:59.000Z

125

Space-Based Solar Power | Department of Energy  

Energy Savers (EERE)

conditions. Safely transmit power through air at intensities no greater than midday sun. Provide upwards of 1 GW of energy to terrestrial reciever, enough to power a large...

126

Data bases for rapid response to power reactor problems  

SciTech Connect

The urgency of the TMI-2 incident demanded prompt answers to an imperious situation. In responding to these challenging circumstances, both government and industry recognized deficiencies in both availability of essential retrievable data and calculational capabilities designed to respond immediately to actual abnormal events. Each responded by initiating new programs to provide a remedy for the deficiencies and to generally improve all safety measures in the nuclear power industry. Many data bases and information centers offer generic data and other technology resources which are generally useful in support of nuclear safety programs. A few centers can offer rapid access to calculational methods and associated data and more will make an effort to do so. As a beneficial spin-off from the lessons learned from TMI-2, more technical effort and financial resources will be devoted to the prevention of accidents, and to improvement of safety measures in the immediate future and for long term R and D programs by both government and the nuclear power industry.

Maskewitz, B.F.

1980-01-01T23:59:59.000Z

127

HeatProbe: a Thermal-based Power Meter System for Tracking Per-user Power Consumption  

E-Print Network (OSTI)

HeatProbe: a Thermal-based Power Meter System for Tracking Per-user Power Consumption Nan-Chen Chen Technology Innovation, Academic Sinica2 {b97006, b96118, b95701241}@csie.ntu.edu.tw, cwyou@citi.sinica.edu.tw, hchu@csie.ntu.edu.tw, mschen@citi.sinica.edu.tw Abstract. This paper proposes HeatProbe, a per

Chu, Hao-hua

128

Research on fuzzy logic based dynamic boundary voltage and reactive power integrated control method  

Science Journals Connector (OSTI)

Aiming at the existing problems of conventional substation voltage and reactive power integrated control method, a new fuzzy logic based dynamic reactive power boundary voltage and reactive power integrated control method is proposed. Fuzzy logic control ... Keywords: dynamic boundary, fuzzy logic, reactive power, voltage

Zigang Xu; Fei Wang

2009-06-01T23:59:59.000Z

129

Web-based Tool for Preliminary Assessment of Wind Power Plant Design  

E-Print Network (OSTI)

Web-based Tool for Preliminary Assessment of Wind Power Plant Design Daniela Borissova1 and Ivan. Designing of reliable and cost-effective industrial wind power plant is a prerequisite for the effective use of wind power as an alternative resource. The design of a wind power plant includes the determination

Mustakerov, Ivan

130

Model-Free Based Water Level Control for Hydroelectric Power Plants  

E-Print Network (OSTI)

Model-Free Based Water Level Control for Hydroelectric Power Plants Cédric JOIN Gérard ROBERT for hydroelectric run-of-the river power plants. To modulate power generation, a level trajectory is planned, the set-point is followed even in severe operating conditions. Keywords: Hydroelectric power plants

Paris-Sud XI, Université de

131

Power Fluctuation Minimization During Behavioral Synthesis using ILP-Based Datapath Scheduling  

E-Print Network (OSTI)

Power Fluctuation Minimization During Behavioral Synthesis using ILP-Based Datapath Scheduling, FL 33620 smohanty,ranganat,chappidi¡ @csee.usf.edu Abstract-- We model the power fluctuation as cycle-to-cycle power gradi- ent and minimize the mean of the power gradients using ILP. We propose

Mohanty, Saraju P.

132

Efficient Indexing Data Structures for Flash-Based Sensor Devices *  

E-Print Network (OSTI)

index structures, MicroHash and MicroGF (Micro Grid Files), exploit the asymmetric read/write and wear

Najjar, Walid A.

133

Comparisons of complex network based models and direct current power flow model to analyze power grid vulnerability under intentional attacks  

Science Journals Connector (OSTI)

Abstract Many scholars have applied complex network based models to investigate power grid vulnerability, but how effective are these models to capture the real performance is an interesting topic. This paper selects two typical complex network based models, including a purely topological model (PTM) and a betweenness based model (BBM), as well as a direct current power flow model (DCPFM), to simulate the topology-based and flow-based vulnerability of power grid under degree, betweenness, maximum traffic and importance based intentional attacks. The relationships of vulnerability results from different models are analyzed and discussed for model comparisons. Taking IEEE 300 power grid with line capacity set proportional to tolerant parameter tp as example, the results show that there exists a critical node attack intensity A I = 0.147 , above which the three models produce almost identical topology-based vulnerability results under each attack strategy at any t p ? 1 , while producing identical flow-based vulnerability results from PTM and DCPFM occurs at A I > 0.147 , and A I > 0.73 for BBM and DCPFM, which indicates that the PTM can better approach the DCPFM for flow-based vulnerability analysis under intentional attacks. Similar results are also found for intentional edge attacks and other power grids.

Min Ouyang; Lijing Zhao; Zhezhe Pan; Liu Hong

2014-01-01T23:59:59.000Z

134

Control of a wind power system based on a tethered wing  

E-Print Network (OSTI)

Control of a wind power system based on a tethered wing R. Lozano Jr, M. Alamir, J. Dumon, A. Abstract: This paper presents a wind power system based on a kite attached with a rope to a dynamo. INTRODUCTION In the last few years new alternative systems for wind power generation [1-8] have appeared which

Paris-Sud XI, Université de

135

Sleep Control for Base Stations Powered by Heterogeneous Energy Sources  

E-Print Network (OSTI)

to the power grid, some BSs are purely powered by the renewable energy. BS sleep is introduced not only to save grid power, but also to store renewable energy for future use when the temporal traffic variation does is to exploit renewable energy, e.g. solar energy, wind energy and so on. The technology, termed as "energy

136

A study of power electronic building block (PEBB)-based integrated shipboard power systems during reconfiguration  

E-Print Network (OSTI)

power system is required to be a highly reconfigurable system to enhance its survivability and reliability. Reconfiguration is a change in the shipboard power system state for various reasons such as new topology, changing missions and emergencies...

Adediran, Adeoti Taiwo

2004-09-30T23:59:59.000Z

137

Applications of power beaming from space-based nuclear power stations. [Laser beaming to airplanes; microwave beaming to ground  

SciTech Connect

Power beaming from space-based reactor systems is examined using an advanced compact, lightweight Rotating Bed Reactor (RBR). Closed Brayton power conversion efficiencies in the range of 30 to 40% can be achieved with turbines, with reactor exit temperatures on the order of 2000/sup 0/K and a liquid drop radiator to reject heat at temperatures of approx. 500/sup 0/K. Higher RBR coolant temperatures (up to approx. 3000/sup 0/K) are possible, but gains in power conversion efficiency are minimal, due to lower expander efficiency (e.g., a MHD generator). Two power beaming applications are examined - laser beaming to airplanes and microwave beaming to fixed ground receivers. Use of the RBR greatly reduces system weight and cost, as compared to solar power sources. Payback times are a few years at present prices for power and airplane fuel.

Powell, J.R.; Botts, T.E.; Hertzberg, A.

1981-01-01T23:59:59.000Z

138

A Case Study of Solar Powered  Cellular Base Stations.  

E-Print Network (OSTI)

?? Green power, environment protection and emission reduction are key factors nowadays in the telecom industry. Balancing of these modes while reducing the capital and… (more)

PANDE, GEETHA

2009-01-01T23:59:59.000Z

139

Membrane-based processes for sustainable power generation using water  

Science Journals Connector (OSTI)

... 18 GW of salinity-gradient power. Although 800 GW of power is currently obtained from hydroelectric processes globally, salinity-gradient energy remains a large and untapped resource. Capturing this energy ... not ions — through the membranes to produce pressurized water that generates electricity using mechanical turbines. RED uses membranes for ion — but not water — transport, and the electrical ...

Bruce E. Logan; Menachem Elimelech

2012-08-15T23:59:59.000Z

140

Short Time Dynamics of Ionic Liquids in AIMD-Based Power Spectra  

Science Journals Connector (OSTI)

Short Time Dynamics of Ionic Liquids in AIMD-Based Power Spectra ... A Car-Parrinello study of 1-ethyl-3-methyl-imidazolium chloride water mixture ...

Katharina Wendler; Martin Brehm; Friedrich Malberg; Barbara Kirchner; Luigi Delle Site

2012-04-04T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Comparisons of purely topological model, betweenness based model and direct current power flow model to analyze power grid vulnerability  

Science Journals Connector (OSTI)

This paper selects three frequently used power grid models including a purely topological model (PTM) a betweennness based model (BBM) and a direct current power flow model (DCPFM) to describe three different dynamical processes on a power grid under both single and multiple component failures. Each of the dynamical processes is then characterized by both a topology-based and a flow-based vulnerability metrics to compare the three models with each other from the vulnerability perspective. Taking as an example the IEEE 300 power grid with line capacity set proportional to a tolerance parameter tp the results show non-linear phenomenon: under single node failures there exists a critical value of tp?=?1.36 above which the three models all produce identical topology-based vulnerability results and more than 85% nodes have identical flow-based vulnerability from any two models; under multiple node failures that each node fails with an identical failure probability fp there exists a critical fp?=?0.56 above which the three models produce almost identical topology-based vulnerability results at any tp???1 but producing identical flow-based vulnerability results only occurs at fp?=?1. In addition the topology-based vulnerability results can provide a good approximation for the flow-based vulnerability under large fp and the priority of PTM and BBM to better approach the DCPFM for vulnerability analysis mainly depends on the value of fp. Similar results are also found for other failure types other system operation parameters and other power grids.

2013-01-01T23:59:59.000Z

142

Powered by technology or powering technology? – Belief-based decision-making in nuclear power and synthetic fuel.  

E-Print Network (OSTI)

?? The overarching question in this study is how and why technical-fixes in energy policy failed. In the post-WWII era, civilian nuclear power and synthetic… (more)

Yang, Chi-Jen

2008-01-01T23:59:59.000Z

143

An Improved AMG-based Method for Fast Power Grid Analysis Cheng Zhuo, Jiang Hu1  

E-Print Network (OSTI)

An Improved AMG-based Method for Fast Power Grid Analysis Cheng Zhuo, Jiang Hu1 and Kangsheng Chen and verification. Meanwhile, the huge size of power grid requires its analysis to be fast and highly scalable. Algebraic multigrid (AMG) has been recognized as a promising approach for fast power grid analysis. We

Hu, Jiang

144

A Partition-based Algorithm for Power Grid Design using Locality  

E-Print Network (OSTI)

1 A Partition-based Algorithm for Power Grid Design using Locality Jaskirat Singh Sachin S widths of the power grid in the partitions are repeatedly adjusted to meet the voltage drop and current density specifications. By using the macromodels of the power grid constructed in the previous levels

Sapatnekar, Sachin

145

FC/Battery Power Management for Electric Vehicle Based Interleaved dc-dc Boost Converter Topology  

E-Print Network (OSTI)

FC/Battery Power Management for Electric Vehicle Based Interleaved dc- dc Boost Converter Topology power systems in electric vehicle application, in order to decrease the FC current ripple. Therefore the performance of the FC system during transient and instantaneous peak power demands in electric vehicle

Paris-Sud XI, Université de

146

A Verification Framework for FBD based Software in Nuclear Power Plants Junbeom Yoo  

E-Print Network (OSTI)

A Verification Framework for FBD based Software in Nuclear Power Plants Junbeom Yoo Div, conducted using a nuclear power plant shutdown system being developed in Korea, demonstrated (2001~2008) is to develop a suite of I&C software for use in the next generation Korean nuclear power

Jee, Eunkyoung

147

Modelling and Simulation of a Single Phase Grid Connected Using Photovoltaic and Battery Based Power Generation  

Science Journals Connector (OSTI)

Microgrid is a part of the power distribution system which uses renewable energy based of power generation connected to the grid system. Multi energy power generation is composed of renewable energy systems including photovoltaic, wind turbine, energy ... Keywords: Battery Storage, Inverter, Microgrid, Photovoltaic, Matlab/Simulink.

Alias Khamis; Azah Mohamed; Hussain Shareef; Afida Ayob; Mohd Shahrieel Mohd Aras

2013-11-01T23:59:59.000Z

148

Reactive power control of grid-connected wind farm based on adaptive dynamic programming  

E-Print Network (OSTI)

is widely used in the wind power system for its advantages over other two types [5]. The characteristicsReactive power control of grid-connected wind farm based on adaptive dynamic programming Yufei Tang Wind farm Power system Adaptive control a b s t r a c t Optimal control of large-scale wind farm has

He, Haibo

149

Estimation of A Sensitivity-Based Metric for Detecting Market Power  

E-Print Network (OSTI)

to measure market power ([1], [3]). The This project was support in part by the US Department of Energy1 Estimation of A Sensitivity-Based Metric for Detecting Market Power HyungSeon Oh and Robert J. Thomas, Fellow, IEEE Abstract ­ The abuse of market power is a potentially serious problem for market

150

Power and Effective Study Size Based on Approximations to the Expected Likelihood Ratio  

E-Print Network (OSTI)

Power and Effective Study Size Based on Approximations to the Expected Likelihood Ratio Test statistical power and precision of heritability estimates can be difficult particularly in complex pedigrees. Previous work focused on the power to detect heritability by using the expectation of the likelihood ratio

Washington at Seattle, University of

151

Gasifier-based power generation: Technology and economics  

Science Journals Connector (OSTI)

The paper describes a 100 kW power generation system installed at Port Blair, Andaman and Nicobar Islands, under a project sponsored by the Department of Non-Conventional Energy Sources, Government of India. The ...

B N Baliga; S Dasappa; U Shrinivasa; H S Mukunda

1993-03-01T23:59:59.000Z

152

Genetic Algorithm Based Damage Control For Shipboard Power Systems  

E-Print Network (OSTI)

approach for future reconfigurable shipboard power systems. The methodology should be capable of representing the dynamic performance (differential algebraic description), the steady state performance (algebraic description), and the system reconfiguration...

Amba, Tushar

2010-07-14T23:59:59.000Z

153

Using a DFIG-based wind farm for grid node reactive power compensation  

Science Journals Connector (OSTI)

Grid nodes voltages are not allowed to deviate excessively from nominal value. Appropriate measures should be taken to prevent such a deviation. The voltage difference between two nodes is strongly affected by reactive power flow. In contrast to frequency control, node voltage control must be achieved locally. This article investigates the use of a wind farm based on a doubly fed induction generators (DFIG) for reactive power compensation of a grid node. A wind speed variation sample is applied to the model of a wind power unit. The power flow between the stator of the DFIG-based wind power unit and the grid is controlled by using the decoupled active and reactive power vector control method. The limits or capacity of the stator and power converters to consume or provide reactive power are discussed. SIMULINK software has been used for the simulation of the system.

Mohamed Kesraoui; Ahmed Chaib; Abdullah Madri; Bilal Hammani

2013-01-01T23:59:59.000Z

154

Budget-based power consumption for application execution on a plurality of compute nodes  

SciTech Connect

Methods, apparatus, and products are disclosed for budget-based power consumption for application execution on a plurality of compute nodes that include: assigning an execution priority to each of one or more applications; executing, on the plurality of compute nodes, the applications according to the execution priorities assigned to the applications at an initial power level provided to the compute nodes until a predetermined power consumption threshold is reached; and applying, upon reaching the predetermined power consumption threshold, one or more power conservation actions to reduce power consumption of the plurality of compute nodes during execution of the applications.

Archer, Charles J; Inglett, Todd A

2012-10-23T23:59:59.000Z

155

Budget-based power consumption for application execution on a plurality of compute nodes  

DOE Patents (OSTI)

Methods, apparatus, and products are disclosed for budget-based power consumption for application execution on a plurality of compute nodes that include: assigning an execution priority to each of one or more applications; executing, on the plurality of compute nodes, the applications according to the execution priorities assigned to the applications at an initial power level provided to the compute nodes until a predetermined power consumption threshold is reached; and applying, upon reaching the predetermined power consumption threshold, one or more power conservation actions to reduce power consumption of the plurality of compute nodes during execution of the applications.

Archer, Charles J; Blocksome, Michael A; Peters, Amanda E; Ratterman, Joseph D; Smith, Brian E

2013-02-05T23:59:59.000Z

156

Baseload Solar Power for California? Ammonia-based Solar Energy Storage Using Trough Concentrators  

E-Print Network (OSTI)

Baseload Solar Power for California? Ammonia-based Solar Energy Storage Using Trough Concentrators to eventually optimise the reactor geometry for ammonia-based solar energy storage with troughs, which.1. Storing Solar Energy with Ammonia H2 / N2 gas liquid NH3 Heat Exchangers Power Generation (Steam Cycle

157

An Experiment in Reducing Cellular Base Station Power Draw With Virtual Coverage  

E-Print Network (OSTI)

providers offer "low-power" GSM Base Stations (BTS) for use with renewable energy sources, these have cellular network during a six-month deployment in rural Papua, Indonesia. We demonstrate that the systemAn Experiment in Reducing Cellular Base Station Power Draw With Virtual Coverage Kurtis Heimerl UC

Parikh, Tapan S.

158

SiC MOSFET Based Single Phase Active Boost Rectifier with Power Factor Correction for Wireless Power Transfer Applications  

SciTech Connect

Wireless Power Transfer (WPT) technology is a novel research area in the charging technology that bridges the utility and the automotive industries. There are various solutions that are currently being evaluated by several research teams to find the most efficient way to manage the power flow from the grid to the vehicle energy storage system. There are different control parameters that can be utilized to compensate for the change in the impedance due to variable parameters such as battery state-of-charge, coupling factor, and coil misalignment. This paper presents the implementation of an active front-end rectifier on the grid side for power factor control and voltage boost capability for load power regulation. The proposed SiC MOSFET based single phase active front end rectifier with PFC resulted in >97% efficiency at 137mm air-gap and >95% efficiency at 160mm air-gap.

Onar, Omer C [ORNL] [ORNL; Tang, Lixin [ORNL] [ORNL; Chinthavali, Madhu Sudhan [ORNL] [ORNL; Campbell, Steven L [ORNL] [ORNL; Miller (JNJ), John M. [JNJ-Miller PLC] [JNJ-Miller PLC

2014-01-01T23:59:59.000Z

159

Modified Centrality Measure Based on Bidirectional Power Flow for Smart and Bulk Power  

E-Print Network (OSTI)

the directionality of power flow of future smart grid. Appli- cability of the proposed method has been evaluated smart and new technologies by utilities [1]. The scope of smart grid includes various generation options systems is the most lucrative part of smart grid from the point of view of regulating energy usage. Excess

Pota, Himanshu Roy

160

Assessment of Metal Media Filters for Advanced Coal-Based Power Generation Applications  

SciTech Connect

Advanced coal and biomass-based gas turbine power generation technologies (IGCC, PFBC, PCFBC, and Hipps) are currently under development and demonstration. Efforts at Siemens Westinghouse Power Corporation (SWPC) have been focused on the development and demonstration of hot gas filter systems as an enabling technology for power generation. This paper reviews SWPC's material and component assessment efforts, identifying the performance, stability, and life of porous metal, advanced alloy, and intermetallic filters under simulated, pressurized fluidized-bed combustion conditions.

Alvin, M.A.

2002-09-19T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Design and PHILS-based Transient Analysis of a Tri-axial HTS Power Cable  

Science Journals Connector (OSTI)

Abstract Tri-axial high-temperature superconducting (HTS) power cables are very efficient compared with other HTS power cables due to their reduced use of HTS wires and cryogenic surface area, resulting from the mutually layered structure of the three phases. However, the operating characteristics of tri-axial HTS power cables differ from other cables in a transient-state condition. In order to install HTS power cables in a real grid, feasibility verification through simulation or experimentation is required in advance. Thus, the authors design a tri-axial HTS power cable and implement a power hardware-in-the-loop simulation that consists of a real time digital simulator-based simulation model and hardware devices including a power supply and a 1 m-long tri-axial HTS model cable. Simulation results show the stability verification under steady-state and transient-state conditions.

Sun-Kyoung Ha; Chang-Soon Kim; Sung-Kyu Kim; Minh-Chau Dinh; Jin-Geun Kim; Minwon Park; In-Keun Yu; Sangjin Lee; Kideok Sim

2014-01-01T23:59:59.000Z

162

Oxide based thermoelectric materials for large scale power generation  

E-Print Network (OSTI)

The thermoelectric (TE) devices are based on the Seebeck and Peltier effects, which describe the conversion between temperature gradient and electricity. The effectiveness of the material performance can be described by ...

Song, Yang, M. Eng. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

163

Performance-degradation model for Li4Ti5O12-based battery cells used in wind power applications  

E-Print Network (OSTI)

1 Performance-degradation model for Li4Ti5O12-based battery cells used in wind power applications D the negative impact of wind power grid integration on the power system stability, which is caused. INTRODUCTION Future wind power plants (WPPs) are intended to function like todays conventional power plants

Teodorescu, Remus

164

Scenario-Based Fault-Tolerant Model Predictive Control for Diesel-Electric Marine Power Plant  

E-Print Network (OSTI)

Scenario-Based Fault-Tolerant Model Predictive Control for Diesel-Electric Marine Power Plant where diesel gener- ator sets (a diesel engine connected to a generator) produce electrical power, which Email: torstein.bo@itk.ntnu.no, tor.arne.johansen@itk.ntnu.no Abstract--Diesel-electric propulsion

Johansen, Tor Arne

165

Power factor correction of an electrical drive system based on multiphase machines  

E-Print Network (OSTI)

Power factor correction of an electrical drive system based on multiphase machines Khoudir MAROUANI_tabache@yahoo.com Abstract--This paper deals with the energy efficiency improvement of an electrical drive which can be used both in wind energy conversion or motor drive applications. A power factor (PF) control scheme

Paris-Sud XI, Université de

166

Fuzzy Based Energy Management Control of A Hybrid Fuel Cell Auxiliary Power System  

E-Print Network (OSTI)

battery auxiliary power unit (APU) for remote applications where a fuel cell is the main energy source for decentralized or distributed energy production, such as telecom, remote sites or even for military applicationsFuzzy Based Energy Management Control of A Hybrid Fuel Cell Auxiliary Power System M. Godoy Simões1

Simões, Marcelo Godoy

167

RTDS Based Maximal Power Point Tracking Simulation for Doubly-Fed Induction Generator  

Science Journals Connector (OSTI)

In the control of the wind generation, the maximal power point tracking (MPPT) control plays important role in the efficiency. This paper presents the simulation results of the MPPT control with RTDS-based DFIG model. At first, it analyzes the vector-control ... Keywords: Wind energy, DFIG((doubly-fed induction generator), Stator flux-oriented, Maximal power point tracking

Jiamin Zhang; Ancheng Xue; Tianshu Bi

2009-10-01T23:59:59.000Z

168

Portable power source based on air-hydrogen fuel cells with free-breathing cathodes  

Science Journals Connector (OSTI)

Portable power source based on air-hydrogen fuel cells (FCs) operating in a free-breathing cathode regime has been developed. At a volume of 100 cm3, the source has a power capacity of 8.5 W h and generates a pow...

S. A. Gurevich; E. I. Terukov; O. I. Kon’kov; A. A. Tomasov…

2011-05-01T23:59:59.000Z

169

10January 1998 Small-Scale Gasification-Based Biomass Power Generation  

E-Print Network (OSTI)

, gasified biomass canbe usedto power internal combustion engines(ICEs), gasturbines, and fuel cells, all. Historical Perspective on Biomass-Gasifier/Internal Combustion Engine (BiG/ICE) Systems Gasified wood10January 1998 I Small-Scale Gasification-Based Biomass Power Generation Eric D. Larson Centerfor

170

Abstract--This paper proposes a stochastic wind power model based on an autoregressive integrated moving average (ARIMA)  

E-Print Network (OSTI)

, for instance to capture rare events such as extreme wind situations. Thus, stochastic wind power models1 Abstract-- This paper proposes a stochastic wind power model based on an autoregressive limits of stochastic wind power generation. The model is constructed based on wind power measurement

Bak-Jensen, Birgitte

171

NCAR WRF-based data assimilation and forecasting systems for wind energy applications power  

E-Print Network (OSTI)

NCAR WRF-based data assimilation and forecasting systems for wind energy applications power Yuewei of these modeling technologies w.r.t. wind energy applications. Then I'll discuss wind farm

Kim, Guebuem

172

Adaptive neurofuzzy inference system-based pollution severity prediction of polymeric insulators in power transmission lines  

Science Journals Connector (OSTI)

This paper presents the prediction of pollution severity of the polymeric insulators used in power transmission lines using adaptive neurofuzzy inference system (ANFIS) model. In this work, laboratory-based pollution performance tests were carried out ...

C. Muniraj; S. Chandraseka

2011-01-01T23:59:59.000Z

173

Gas Turbine Based Power Cycles - A State-of-the-Art Review  

Science Journals Connector (OSTI)

Gas turbines have been used in wide ranging applications ... This paper provides the historical evolution of the gas turbine (GT) based power cycles. A detailed ... , modified Brayton cycles under development by ...

R. K. Bhargava; M. Bianchi; A. De Pascale…

2007-01-01T23:59:59.000Z

174

RTDS-Based Design and Simulation of Distributed P-Q Power Resources in Smart Grid  

E-Print Network (OSTI)

2010. [11] G. Strbac, “Demand side management: Benefits andGarcia, “Autonomous Demand Side Management Based on Game-and A. Y. Wang, “Demand side management for wind power

Taylor, Zachariah David

2014-01-01T23:59:59.000Z

175

Stability analysis and reactive power compensation issue in a microgrid with a DFIG based WECS  

Science Journals Connector (OSTI)

Abstract This paper presents a novel methodology for compensating reactive power in a microgrid, having a DFIG based wind–diesel system, to enhance the voltage stability of the hybrid system. UPFC as a FACTS device is proposed in order to improve the control of reactive power mismatch and the stability of the system. A small signal model of the wind–diesel system, DFIG based wind turbine system, UPFC and the controllers are designed for the stability analysis. Further, the voltage variation and reactive power compensation is analysed with the incorporation of proposed ANFIS based UPFC controller. Simulations are performed in MATLAB environment for transient stability analysis in a wind–diesel based microgrid with different wind power input and 2% step increase in load demand. Simulation results illustrate the efficiency and effectiveness of the proposed approach and its impact upon transient behaviour of the microgrid.

Asit Mohanty; Meera Viswavandya; Prakash K. Ray; Sandipan Patra

2014-01-01T23:59:59.000Z

176

A New Neuro-Based Method for Short Term Load Forecasting of Iran National Power System  

Science Journals Connector (OSTI)

This paper presents a new neuro-based method for short term load forecasting of Iran national power system (INPS). A MultiLayer Perceptron ( ... were selected through a peer investigation on historical data relea...

R. Barzamini; M. B. Menhaj; Sh. Kamalvand…

2005-01-01T23:59:59.000Z

177

Conceptional Design of Solar Power Plant with Central Receiver Tower Based on Improved Heliostats  

Science Journals Connector (OSTI)

For technical and economical evaluations of solar power plant, the comparisons from technical points and electricity cost are presented on the solar plant with the heliostats based on new material and configurati...

H. Yoshikawa; N. Ikeda

1985-01-01T23:59:59.000Z

178

Identifications and Monitoring of Power System Dynamics Based on the PMUs and Wavelet Technique  

E-Print Network (OSTI)

Abstract—Low frequency power oscillations may be triggered by many events in the system. Most oscillations are damped by the system, but undamped oscillations can lead to system collapse. Oscillations develop as a result of rotor acceleration/deceleration following a change in active power transfer from a generator. Like the operations limits, the monitoring of power system oscillating modes is a relevant aspect of power system operation and control. Unprevented low-frequency power swings can be cause of cascading outages that can rapidly extend effect on wide region. On this regard, a Wide Area Monitoring, Protection and Control Systems (WAMPCS) help in detecting such phenomena and assess power system dynamics security. The monitoring of power system electromechanical oscillations is very important in the frame of modern power system management and control. In first part, this paper compares the different technique for identification of power system oscillations. Second part analyzes possible identification some power system dynamics behaviors Using Wide Area Monitoring Systems (WAMS) based on Phasor Measurement Units (PMUs) and wavelet technique. Keywords—Power system oscillations, Modal analysis, Prony, Wavelet, PMU, Wide Area Monitoring System.

Samir Avdakovic; Amir Nuhanovic

2010-01-01T23:59:59.000Z

179

Transistor-based filter for inhibiting load noise from entering a power supply  

DOE Patents (OSTI)

A transistor-based filter for inhibiting load noise from entering a power supply is disclosed. The filter includes a first transistor having an emitter coupled to a power supply, a collector coupled to a load, and a base. The filter also includes a first capacitor coupled between the base of the first transistor and a ground terminal. The filter further includes an impedance coupled between the base and a node between the collector and the load, or a second transistor and second capacitor. The impedance can be a resistor or an inductor.

Taubman, Matthew S

2013-07-02T23:59:59.000Z

180

The future of GPS-based electric power system measurements, operation and control  

SciTech Connect

Much of modern society is powered by inexpensive and reliable electricity delivered by a complex and elaborate electric power network. Electrical utilities are currently using the Global Positioning System-NAVSTAR (GPS) timekeeping to improve the network`s reliability. Currently, GPS synchronizes the clocks on dynamic recorders and aids in post-mortem analysis of network disturbances. Two major projects have demonstrated the use of GPS-synchronized power system measurements. In 1992, the Electric Power Research Institute`s (EPRI) sponsored Phase Measurements Project used a commercially available Phasor Measurements Unit (PMU) to collect GPS-synchronized measurements for analyzing power system problems. In 1995, Bonneville Power Administration (BPA) and Western Area Power Administration (WAPA) under DOE`s and EPRI`s sponsorship launched the Wide Area Measurements (WAMS) project. WAMS demonstrated GPS-synchronized measurements over a large area of their power networks and demonstrated the networking of GPS-based measurement systems in BPA and WAPA. The phasor measurement technology has also been used to conduct dynamic power system tests. During these tests, a large dynamic resistor was inserted to simulate a small power system disturbance.

Rizy, D.T. [Oak Ridge National Lab., TN (United States); Wilson, R.E. [Western Area Power Administration, Golden, CO (United States); Martin, K.E.; Litzenberger, W.H. [Bonneville Power Administration, Portland, OR (United States); Hauer, J.F. [Pacific Northwest National Lab., Richland, WA (United States); Overholt, P.N. [Dept. of Energy, Washington, DC (United States); Sobajic, D.J. [Electric Power Research Inst., Palo Alto, CA (United States)

1998-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Radioisotope power system based on derivative of existing Stirling engine  

SciTech Connect

In a recent paper, the authors presented the results of a system design study of a 75-watt(c) RSG (Radioisotope Stirling Generator) for possible application to the Pluto Fast Flyby mission. That study was based on a Stirling engine design generated by MTI (Mechanical Technology, Inc.). The MTI design was a derivative of a much larger (13 kwe) engine that they had developed and tested for NASA`s LERC. Clearly, such a derivative would be a major extrapolation (downsizing) from what has actually been built and tested. To avoid that, the present paper describes a design for a 75-watt RSG system based on derivatives of a small (11-watt) engine and linear alternator system that has been under development by STC (Stirling Technology Company) for over three years and that has operated successfully for over 15,000 hours as of March 1995. Thus, the STC engines would require much less extrapolation from proven designs. The design employs a heat source consisting of two standard General Purpose Heat Source (GPHS) modules, coupled to four Stirling engines with linear alternators, any three of which could deliver the desired 75-watt(e) output if the fourth should fail. The four engines are coupled to four common radiators with redundant heatpipes for rejecting the engines` waste heat to space. The above engine and radiator redundancies promote system reliability. The paper describes detailed analyses to determine the effect of radiator geometry on system mass and performance, before and after an engine or heatpipe failure.

Schock, A.; Or, C.T.; Kumar, V. [Orbital Sciences Corp., Germantown, MD (United States)

1995-12-31T23:59:59.000Z

182

Efficient Macromodeling of Power Distribution Planes using Delay Extraction based Transmission Line Representation  

E-Print Network (OSTI)

Efficient Macromodeling of Power Distribution Planes using Delay Extraction based Transmission Line plane structures are based on discretization of the plane into a grid of transmission lines [3]-[6]. Macromodeling the transmission line network using conventional lumped RLGC elements [4]- [6] can provide

Roy, Sourajeet

183

Particle swarm optimization with query-based learning for multi-objective power contract problem  

Science Journals Connector (OSTI)

Particle swarm optimization (PSO) is one of the most important research topics on swarm intelligence. Existing PSO techniques, however, still contain some significant disadvantages. In this paper, we present a new QBL-PSO algorithm that uses QBL (query-based ... Keywords: Multi-objective optimization, Particle swarm optimization, Power contract, Query-based learning

Ray-I Chang; Shu-Yu Lin; Yuhsin Hung

2012-02-01T23:59:59.000Z

184

Modelling approach for the Simulation-Based Preliminary Design of Power Transmissions  

E-Print Network (OSTI)

- 1/17 - Modelling approach for the Simulation-Based Preliminary Design of Power Transmissions. However, the Model Based Design of actuation systems lacks methodologies and expressive simulation models scaling laws and acausal modelling can be used as a design tool, exploiting inverse simulation

Boyer, Edmond

185

PLC-Based Safety Critical Software Development for Nuclear Power Plants  

E-Print Network (OSTI)

PLC-Based Safety Critical Software Development for Nuclear Power Plants Junbeom Yoo1 , Sungdeok Cha}@kaeri.re.kr Abstract. This paper proposes a PLC(Programmable Logic Controller)-based safety critical software(FBD), a widely used PLC programming language. Finally, we manually refine the FBD programs so that redundant

186

Design of a creep resistant nickel base superalloy for power plant applications  

E-Print Network (OSTI)

-component system based on the assessment of binary, ternary, and quaternary experimental data. It puts several and used as tools to design a new `made to measure' nickel base superalloy for power plant applications with steam temperatures as high as 750°C. This alloy has been designed on the basis of its estimated

Cambridge, University of

187

Efficient coal-based power generation in India: A market opportunity  

SciTech Connect

The planned addition of over 100,000 MW power generation capacity in India in the next 10 years will provide attractive business opportunities for independent power producers, engineering and consulting companies, and equipment manufacturers in the US. The US Agency for International Development (USAID) is providing, through the US Department of Energy (DOE), necessary technical and project development support to the government stakeholders (Indian Ministries of Power and Coal) and private stakeholders (Ahmedabad Electric Co. and Bombay Suburban Electric Supply) for identifying and promoting advanced clean coal technologies. Implementation of advanced technologies improves electric power generation efficiency and economics, and environmental management in India (e.g., reduces emissions of greenhouse gases and particulates, and increases byproduct utilization). This paper presents a brief overview of the coal-based power generation and related technical support activities being provided in India by the DOE's Federal Energy Technology Center and its support contractor, Burns and Roe Services Corporation.

Gollakota, S.; Rao, N.; Staats, G.; Sinha, K.

1998-07-01T23:59:59.000Z

188

A review of ash in conventional and advanced coal-based power systems  

SciTech Connect

Process conditions are briefly described for conventional and advanced power systems. The advanced systems include both combustion and gasification processes. We discuss problems in coal-based power generation systems, including deposition, agglomeration and sintering of bed materials, and ash attack are discussed. We also discuss methods of mitigating ash problems and anticipated changes anticipated in ash use by converting from conventional to advanced systems.

Holcombe, N.T.

1995-12-31T23:59:59.000Z

189

ALGORITHM-BASED LOW-POWER TRANSFORM CODING ARCHITECTURES An-Yeu Wu and K. J. Ray Liu  

E-Print Network (OSTI)

ALGORITHM-BASED LOW-POWER TRANSFORM CODING ARCHITECTURES An-Yeu Wu and K. J. Ray Liu Electrical].In order to meet the low-power/high-throughputconstraint, the key issue is to "compensate" the increased. In this paper, we will show how to design algorithm- based low-power transform coding architectures using

Liu, K. J. Ray

190

Agent based control of power systems, ForskEL (Smart Grid Project) | Open  

Open Energy Info (EERE)

Agent based control of power systems, ForskEL (Smart Grid Project) Agent based control of power systems, ForskEL (Smart Grid Project) Jump to: navigation, search Project Name Agent based control of power systems, ForskEL Country Denmark Coordinates 56.26392°, 9.501785° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":56.26392,"lon":9.501785,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

191

Biocompatible wireless power transferring and charging based on ultrasonic resonance devices  

Science Journals Connector (OSTI)

To increase application area of implantable devices for medical treatment including implantable cardiac defibrillator or deep brain stimulator the rechargeable battery module is highly requested. The previous Li-type battery has limited current sources so that the patient is forced to have surgery just for changing battery. Previous technologies such as magnetic resonance and induction coupling have limited applications because of its short transfer distance compared to device size and magnetic field intensity limitation for the safety of body exposure. As an alternative the biocompatible wireless power transferring and charging technology is proposed using ultrasonic resonance devices. For the high efficient power transferring optimal transfer frequency is calculated based on the acoustic radiation and damping effect. Then the optimal load resistance is selected for matching power condition in receiver. And transmitter is designed to match the optimal transfer frequency. The ultrasonic resonance transmitter and receiver are manufactured with the size of 20 mm diameter 6.0 mm height. The energy conversion efficiency from input electrical power of transmitter and output power of receiver is about 25.6% at 10 cm distance experimentally. The maximum transferring power is up to 15 mW. This result is quite high considered with the device size and the power transfer distance.

2013-01-01T23:59:59.000Z

192

Two-dimensional AXUV-based radiated power density diagnostics on NSTX-U  

SciTech Connect

A new set of radiated-power-density diagnostics for the National Spherical Torus Experiment Upgrade (NSTX-U) tokamak have been designed to measure the two-dimensional poloidal structure of the total photon emissivity profile in order to perform power balance, impurity transport, and magnetohydrodynamic studies. Multiple AXUV-diode based pinhole cameras will be installed in the same toroidal angle at various poloidal locations. The local emissivity will be obtained from several types of tomographic reconstructions. The layout and response expected for the new radially viewing poloidal arrays will be shown for different impurity concentrations to characterize the diagnostic sensitivity. The radiated power profile inverted from the array data will also be used for estimates of power losses during transitions from various divertor configurations in NSTX-U. The effect of in-out and top/bottom asymmetries in the core radiation from high-Z impurities will be addressed.

Faust, I.; Parker, R. R. [MIT - Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States); Delgado-Aparicio, L.; Bell, R. E.; Diallo, A.; Gerhardt, S. P.; LeBlanc, B.; Kozub, T. A. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540 (United States); Tritz, K. [The Johns Hopkins University, Baltimore, Maryland 21209 (United States); Stratton, B. C. [MIT - Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States); Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540 (United States)

2014-11-15T23:59:59.000Z

193

Grid-friendly wind power systems based on the synchronverter technology  

Science Journals Connector (OSTI)

Abstract Back-to-back PWM converters are becoming a realistic alternative to conventional converters in high-power wind power applications. In this paper, a control strategy based on the synchronverter technology is proposed for back-to-back PWM converters. Both converters are run as synchronverters, which are mathematically equivalent to the conventional synchronous generators. The rotor-side converter is responsible for maintaining the DC link voltage and the grid-side converter is responsible for the maximum power point tracking (MPPT). As the two converters are operated using the synchronverter technology, the formed wind power system becomes more friendly to the grid. Extensive real-time digital simulation results are presented to verify the effectiveness of the proposed method under normal operation and grid-fault scenarios.

Qing-Chang Zhong; Zhenyu Ma; Wen-Long Ming; George C. Konstantopoulos

2015-01-01T23:59:59.000Z

194

Performance evaluation of CSI-based unified power quality conditioner using artificial neural network  

Science Journals Connector (OSTI)

In recent years unified power quality conditioner (UPQC) is being used as a universal active power conditioning device to mitigate both current as well as voltage harmonics at a distribution end of power system network. The performance of UPQC mainly depends upon how quickly and accurately compensation signals are derived. The artificial neural network (ANN) trained with conventional compensator data, can deliver compensation signals more accurately and quickly than conventional compensator at varied load condition. This paper presents performance verification of CSI-based UPQC using artificial neural network. The ANN-based compensation system eliminates voltage as well as current harmonics with good dynamic response. Extensive simulation results using Matlab/Simulink for RL load connected through an uncontrolled bridge rectifier validates the performance of ANN compensator.

K. Vadirajacharya; P. Agarwal; H.O. Gupta

2008-01-01T23:59:59.000Z

195

DOE Selects Nine New University Coal Research Projects to Advance Coal-Based Power  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Selects Nine New University Coal Research Projects to Advance Coal-Based Power Selects Nine New University Coal Research Projects to Advance Coal-Based Power Systems Nine new projects selected by the U.S. Department of Energy (DOE) under the University Coal Research program will seek long-term solutions for the clean and efficient use of our nation's abundant coal resources. The announcement today of the selections marks the 34 th round of the Department's longest-running coal program, which began in 1979. This research continues DOE efforts to improve the understanding of the chemical and physical processes governing coal conversion and utilization, and support the technological development of the advanced coal power systems of the future. These advanced systems include ultra-clean

196

Energy management of flywheel-based energy storage device for wind power smoothing  

Science Journals Connector (OSTI)

Abstract Power fluctuations of wind generators may affect power quality especially in weak or isolated grids. This paper proposes an energy management strategy for a flywheel-based energy storage device. The aim of the flywheel is to smooth the net power flow injected to the grid by a variable speed wind turbine. The design of the energy management strategy is conducted through several phases. First, a definition and determination of the optimal operation of the storage device is carried out through the formulation and deterministic solution of an optimization problem in GAMS. Based on this solution, an online energy management algorithm is proposed to achieve a close to optimal operation of the flywheel. This algorithm determines the set points of the torque control of the flywheel electrical machine. The proposed methodology is illustrated by simulations.

Francisco Díaz-González; Andreas Sumper; Oriol Gomis-Bellmunt; Fernando D. Bianchi

2013-01-01T23:59:59.000Z

197

High power-saving and fidelity-conserving object-based local dimming for LCD systems with LED-based backlight units  

Science Journals Connector (OSTI)

A local dimming technique which is enabled on LED-based LCD systems is expected to give more power saving than a global one. However, prior local dimming techniques have not considered human visual system-awareness much as done in an advanced global ... Keywords: Backlight dimming, Complexity, Fidelity, Human visual system, LED BLU-based LCD, Object-based local dimming, Power

Aldhino Anggorosesar, Young-Jin Kim

2014-09-01T23:59:59.000Z

198

Power Limitation Control for a PMSG-Based Marine Current Turbine at High Tidal Speed and  

E-Print Network (OSTI)

Power Limitation Control for a PMSG-Based Marine Current Turbine at High Tidal Speed and Strong Sea Abstract--This paper deals with the control strategies for a fixed-pitch marine current turbine (MCT) when the nominal MPPT tracking speed during high speed marine currents. In the speed control strategy, the turbine

Paris-Sud XI, Université de

199

Journal of Power Sources 128 (2004) 5460 Microfluidic fuel cell based on laminar flow  

E-Print Network (OSTI)

Journal of Power Sources 128 (2004) 54­60 Microfluidic fuel cell based on laminar flow Eric R a novel microfluidic fuel cell concept that utilizes the occurrence of multi-stream laminar flow of a Y-shaped microfluidic channel in which two liquid streams containing fuel and oxidant merge

Kenis, Paul J. A.

200

High-Power InP-based Waveguide Photodiodes and Photodiode Arrays Heterogeneously Integrated on SOI  

E-Print Network (OSTI)

High-Power InP-based Waveguide Photodiodes and Photodiode Arrays Heterogeneously Integrated on SOI evanescently-coupled modified uni-traveling carrier photodiodes (MUTC PDs) on silicon-on-insulator (SOI on silicon is a promising approach to realize high-performance photodiodes on a silicon photonics platform

Bowers, John

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Direct Power Control of Doubly-Fed Generator Based Wind Turbine Converters to Improve Low Voltage  

E-Print Network (OSTI)

Control (DPC) is discussed for Low Voltage Ride Through (LVRT) of DFIG based wind turbine converters power integration state that doubly fed induction generator (DFIG) controllers should be capable and maintaining dc bus voltage, then the DFIG will stay online during the disturbance. A fast acting controller

Kimball, Jonathan W.

202

A New Model of Centrality Measure based on Bidirectional Power Flow for  

E-Print Network (OSTI)

power flow based model to evaluate the criticality in smart grid environment. Change in direction of smart grid includes various generation options, primarily in the distribution side ­ near consumers. Engagement of customers with the energy management systems is the most lucrative part of smart grid from

Pota, Himanshu Roy

203

High-efficient solar power systems based on thermionic converter with small gap  

SciTech Connect

Various configurations of power systems based on thermionic converter with small interelectrode gap have been considered. The results of studies of systems energy characteristics are presented. The high efficiency and perspectivety of such systems for different applications have been shown. {copyright} {ital 1996 American Institute of Physics.}

Nikolaev, Y.V.; Eryomin, S.A.; Kalmykov, S.S.; Karpechenko, Y.D.; Kucherov, R.Y.; Lapochkin, N.V. [Research Institute of Scientific Industrial Association ``Lutch``, 142100, Podolsk, Moscow Region (Russian Federation)

1996-03-01T23:59:59.000Z

204

Greater power and computational efficiency for kernel-based association testing of sets of genetic variants  

Science Journals Connector (OSTI)

......Motivation: Set-based variance component tests have been identified as a way to increase...individual effects. However, the choice of test statistic has been largely ignored even...power. We compared a standard statistical test-a score test-with a recently developed......

Christoph Lippert; Jing Xiang; Danilo Horta; Christian Widmer; Carl Kadie; David Heckerman; Jennifer Listgarten

2014-11-15T23:59:59.000Z

205

Energy 32 (2007) 406417 Modeling and control of a SOFC-GT-based autonomous power system  

E-Print Network (OSTI)

, Norway b SINTEF ICT, 7465 Trondheim, Norway c Department of Energy and Process Engineering, NorwegianEnergy 32 (2007) 406­417 Modeling and control of a SOFC-GT-based autonomous power system Rambabu University of Science and Technology, Trondheim, 7491, Norway Received 31 October 2005 Abstract

Foss, Bjarne A.

206

Optimization of a Steady-State Tokamak-Based Power Plant  

E-Print Network (OSTI)

Optimization of a Steady-State Tokamak-Based Power Plant Farrokh Najmabadi University of California, San Diego, La Jolla, CA IEA Workshop 59 "Shape and aspect ratio optimization for high , steady between a physics optimization and an integrated systems optimization Identify key impact of physics

207

Virginia Tech Comprehensive Power-based Fuel Consumption Model: Model Development and Testing  

E-Print Network (OSTI)

sources such as hybrid-electric technologies, bio-ethanol, and hydrogen fuel cells are emergingVirginia Tech Comprehensive Power-based Fuel Consumption Model: Model Development and Testing, Moran, Saerens, and Van den Bulck 2 ABSTRACT Existing fuel consumption and emission models suffer from

Rakha, Hesham A.

208

Power-control based scheduling for commercial transatlantic flights Husam Fahmi, Seowoo Jang and Saewoong Bahk  

E-Print Network (OSTI)

Power-control based scheduling for commercial transatlantic flights Husam Fahmi, Seowoo Jang the flight times/pattern of transatlantic flight to provide an efficient transmission schedule for all nodes in the introduction, this paper focuses on improving connectivity for transatlantic flights. Transatlantic flights

Bahk, Saewoong

209

A maximum power tracking algorithm based on photovoltaic current control for matching loads to a photovoltaic generator  

Science Journals Connector (OSTI)

In this paper, a novel maximum power point tracking (MPPT) approach is studied. It is based on the photovoltaic (PV) current control. The last one...

Ben Hamed Mouna; Sbita Lassaâd

2012-10-01T23:59:59.000Z

210

An integrated computer-based training simulator for the operative personnel of the 800-MW power-generating unit at the Perm District Power Station  

Science Journals Connector (OSTI)

The integrated computer-based training simulator for an 800-MW power-generating unit is described. Its capacities for training the personnel of the boiler-turbine and chemical departments are shown.

N. Yu. Pevneva; V. N. Piskov; A. N. Zenkov

2007-07-01T23:59:59.000Z

211

Air handler sound power prediction method based on ARI Standard 260  

Science Journals Connector (OSTI)

A method of predicting air handler sound power based on ratings for a product line is described. The method provides octave band sound power levels based on ratings obtained using Air?Conditioning and Refrigeration Institute (ARI) Standard 260 Sound Rating Of Ducted Air Moving And Conditioning Equipment. Detailed sound power information for HVAC equipment is not always available but it is important in accurately predicting noise levels in acoustically sensitive spaces. To address this need a rating program was undertaken using ARI 260. This standard is a reverberant room technique for sound rating ducted air conditioning equipment using a reference sound source substitution method. Since sound travels from the source to receiver along numerous paths this standard differentiates between sound power emanating from several common paths called components. Components for this project included ducted discharge free inlet plus casing ducted inlet and casing. The standard provides guidance on adequate number of fan sizes appurtenances and operating characteristics. The intent of the project was to provide a model to predict sound power by unit size component operating condition and unit configuration. Good agreement was found between predicted levels and measured data.

2000-01-01T23:59:59.000Z

212

Fuel Cells: Thermodynamic Engine to a Sustainable Energy Future Richard T. Carlin  

E-Print Network (OSTI)

sustainable, reliable electrical grids and micro-grids. Integration of fuel cell systems with renewable penetration; enhances grid and micro-grid power management; provides efficient electrical power generation from biomass; provides easily scalable micro-grid energy storage; and enables long

Levi, Anthony F. J.

213

ANN-based reactive power controller with real-time web monitoring  

Science Journals Connector (OSTI)

This study introduced a real-time reactive power controller based on artificial neural network with web-based monitoring. A feed-forward employing back-propagation was used as training technique. The inputs to the network were the active and reactive power of each load. The targets were to switch on/off the capacitor banks during normal and abnormal conditions. The network was trained using developed MATLAB program and the weights resulted to minimum mean-square-error were fed to the microcontroller unit. The method was then tested in a three-bus radial distribution system model and implemented using Zilog microcontroller. The system actions were monitored using web-based monitoring application. The method was validated in actual operation of the system using the test data and results were satisfactorily obtained.

Carl John O. Salaan; Mark Joseph M. Victoria; Noel R. Estoperez

2013-01-01T23:59:59.000Z

214

Implementing agent-based emissions trading for controlling Virtual Power Plant emissions  

Science Journals Connector (OSTI)

Abstract A methodology was developed and tested for controlling the emissions from a group of micro-generators aggregated in a Virtual Power Plant. The methodology is based on the EU Emissions Trading Scheme. A multi-agent system was designed and simulations were performed. The operation of the system was demonstrated experimentally using micro-generation sources installed in two laboratories. Two days of experiments were performed. Results show that system emissions have been controlled with a good accuracy, since only small deviations between desired and actual emissions output were observed. It was found that Virtual Power Plant controllability increases significantly by increasing the number of participating micro-generators.

Spyros Skarvelis-Kazakos; Evangelos Rikos; Efstathia Kolentini; Liana M. Cipcigan; Nick Jenkins

2013-01-01T23:59:59.000Z

215

Sustainable Forward Operating Base Nuclear Power Evaluation (Relationship Mapping System) Users’ Manual  

SciTech Connect

The Sustainable Forward Operating Base (FOB) Nuclear Power Evaluation was developed by the Idaho National Laboratory Systems Engineering Department to support the Defense Advanced Research Projects Agency (DARPA) in assessing and demonstrating the viability of deploying small-scale reactors in support of military operations in theatre. This document provides a brief explanation of how to access and use the Sustainable FOB Nuclear Power Evaluation utility to view assessment results as input into developing and integrating the program elements needed to create a successful demonstration.

Not Listed

2012-01-01T23:59:59.000Z

216

Fuzzy rule-based methodology for residential load behaviour forecasting during power systems restoration  

Science Journals Connector (OSTI)

Inadequate load pickup during power system restoration can lead to overload and underfrequency conditions, and even restart the blackout process, due to thermal energy losses. Thus, load behaviour estimation during restoration is desirable to avoid inadequate pickups. This work describes an artificial intelligence method to aid the operator in taking decisions during system restoration by estimating residential load behaviour parameters such as overload in buses and the necessary time to recover steady-state power consumption. This method uses a fuzzy rule-based system to forecast the residential load, obtaining correct estimates with low computational cost. Test results using actual substation data are presented.

Lia Toledo Moreira Mota; Alexandre Assis Mota; Andre Luiz Morelato Franca

2005-01-01T23:59:59.000Z

217

Coordinating Regulation and Demand Response in Electric Power Grids: Direct and Price-Based Tracking Using Multirate Economic Model Predictive Control  

Science Journals Connector (OSTI)

?Based on “Coordinating regulation and demand response in electric power grids using multirate model...

Haitham Hindi; Daniel Greene…

2012-01-01T23:59:59.000Z

218

Energy management of power-split plug-in hybrid electric vehicles based on simulated annealing and Pontryagin's minimum principle  

E-Print Network (OSTI)

Energy management of power-split plug-in hybrid electric vehicles based on simulated annealing management method is proposed for a power-split plug-in hybrid electric vehicle (PHEV). Through analyzing and hybrid driving mode. During the pure electric driving mode, the vehicle is only powered by the battery

Mi, Chunting "Chris"

219

Abstract--We consider the management of electric vehicle (EV) loads within a market-based Electric Power System  

E-Print Network (OSTI)

battery charging while engaging in energy and reserve capacity transactions in the wholesale power market day-ahead and real-time power market framework similar to that used in the major USA power pools (PJMAbstract--We consider the management of electric vehicle (EV) loads within a market-based Electric

Caramanis, Michael

220

High power single-crystal fiber CW 946 nm laser and blue generation based on Rubidium-doped PPKTP  

E-Print Network (OSTI)

for high power, continuous wave and polarized laser at 946 nm (fig1.c). We demonstrate a polarized laser. Laurell, "High-power, continous-wave, second harmonic generation at 532 nm in periodically poled KTiOPO4(b)(a) (c) High power single-crystal fiber CW 946 nm laser and blue generation based on Rubidium

Boyer, Edmond

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Abstract--This paper proposes an effective VAR planning based on reactive power margin for the enhancement of dynamic  

E-Print Network (OSTI)

networks. Distributed generation based on renewable energy sources offers a promising solution1 Abstract-- This paper proposes an effective VAR planning based on reactive power margin for the enhancement of dynamic voltage stability in distribution networks with distributed wind generation

Pota, Himanshu Roy

222

Improved thermoelectric power output from multilayered polyethylenimine doped carbon nanotube based organic composites  

SciTech Connect

By appropriately selecting the carbon nanotube type and n-type dopant for the conduction layers in a multilayered carbon nanotube composite, the total device thermoelectric power output can be increased significantly. The particular materials chosen in this study were raw single walled carbon nanotubes for the p-type layers and polyethylenimine doped single walled carbon nanotubes for the n-type layers. The combination of these two conduction layers leads to a single thermocouple Seebeck coefficient of 96 ± 4??VK{sup ?1}, which is 6.3 times higher than that previously reported. This improved Seebeck coefficient leads to a total power output of 14.7 nW per thermocouple at the maximum temperature difference of 50?K, which is 44 times the power output per thermocouple for the previously reported results. Ultimately, these thermoelectric power output improvements help to increase the potential use of these lightweight, flexible, and durable organic multilayered carbon nanotube based thermoelectric modules in low powered electronics applications, where waste heat is available.

Hewitt, Corey A.; Montgomery, David S.; Barbalace, Ryan L.; Carlson, Rowland D.; Carroll, David L., E-mail: carroldl@wfu.edu [Center for Nanotechnology and Molecular Materials, Wake Forest University, 501 Deacon Blvd., Winston Salem, North Carolina 27105 (United States)

2014-05-14T23:59:59.000Z

223

Risk-based decision making method for maintenance policy selection of thermal power plant equipment  

Science Journals Connector (OSTI)

This study presents a decision-making method for maintenance policy selection of power plants equipment. The method is based on risk analysis concepts. The method first step consists in identifying critical equipment both for power plant operational performance and availability based on risk concepts. The second step involves the proposal of a potential maintenance policy that could be applied to critical equipment in order to increase its availability. The costs associated with each potential maintenance policy must be estimated, including the maintenance costs and the cost of failure that measures the critical equipment failure consequences for the power plant operation. Once the failure probabilities and the costs of failures are estimated, a decision-making procedure is applied to select the best maintenance policy. The decision criterion is to minimize the equipment cost of failure, considering the costs and likelihood of occurrence of failure scenarios. The method is applied to the analysis of a lubrication oil system used in gas turbines journal bearings. The turbine has more than 150 MW nominal output, installed in an open cycle thermoelectric power plant. A design modification with the installation of a redundant oil pump is proposed for lubricating oil system availability improvement.

F.G. Carazas; G.F.M. Souza

2010-01-01T23:59:59.000Z

224

pCloud: A Cloud-based Power Market Simulation Environment  

SciTech Connect

This research conducted by the Newton Energy Group, LLC (NEG) is dedicated to the development of pCloud: a Cloud-based Power Market Simulation Environment. pCloud is offering power industry stakeholders the capability to model electricity markets and is organized around the Software as a Service (SaaS) concept -- a software application delivery model in which software is centrally hosted and provided to many users via the internet. During the Phase I of this project NEG developed a prototype design for pCloud as a SaaS-based commercial service offering, system architecture supporting that design, ensured feasibility of key architecture's elements, formed technological partnerships and negotiated commercial agreements with partners, conducted market research and other related activities and secured funding for continue development of pCloud between the end of Phase I and beginning of Phase II, if awarded. Based on the results of Phase I activities, NEG has established that the development of a cloud-based power market simulation environment within the Windows Azure platform is technologically feasible, can be accomplished within the budget and timeframe available through the Phase II SBIR award with additional external funding. NEG believes that pCloud has the potential to become a game-changing technology for the modeling and analysis of electricity markets. This potential is due to the following critical advantages of pCloud over its competition: - Standardized access to advanced and proven power market simulators offered by third parties. - Automated parallelization of simulations and dynamic provisioning of computing resources on the cloud. This combination of automation and scalability dramatically reduces turn-around time while offering the capability to increase the number of analyzed scenarios by a factor of 10, 100 or even 1000. - Access to ready-to-use data and to cloud-based resources leading to a reduction in software, hardware, and IT costs. - Competitive pricing structure, which will make high-volume usage of simulation services affordable. - Availability and affordability of high quality power simulators, which presently only large corporate clients can afford, will level the playing field in developing regional energy policies, determining prudent cost recovery mechanisms and assuring just and reasonable rates to consumers. - Users that presently do not have the resources to internally maintain modeling capabilities will now be able to run simulations. This will invite more players into the industry, ultimately leading to more transparent and liquid power markets.

Rudkevich, Aleksandr; Goldis, Evgeniy

2012-12-02T23:59:59.000Z

225

MULTILEVEL INVERTER, BASED ON MULTI-STAGE CONNECTION OF THREE-LEVEL CONVERTERS, SCALED IN POWER OF THREE.  

E-Print Network (OSTI)

MULTILEVEL INVERTER, BASED ON MULTI-STAGE CONNECTION OF THREE-LEVEL CONVERTERS, SCALED IN POWER. #12;MULTILEVEL INVERTER, BASED ON MULTI-STAGE CONNECTION OF THREE-LEVEL CONVERTERS, SCALED IN POWER, Concepción, Chile ABSTRACT A multi-stage inverter using three-state converters is being analyzed

Catholic University of Chile (Universidad Católica de Chile)

226

Study of the implementation of STATCOM on DFIG-based wind farm connected to a power system  

Science Journals Connector (OSTI)

The integration of Doubly Fed Induction Generator (DFIG) based wind farm into the power grid has become a major concern for power system engineers today. Voltage stability is a key factor to maintain DFIG-based wind farm in service during the grid disturbances. ...

Tarek Medalel Masaud; P. K. Sen

2012-01-01T23:59:59.000Z

227

Design of a Power Oscillation Damper for DFIG-based Wind Energy Conversion System Using Modified Particle Swarm Optimizer  

Science Journals Connector (OSTI)

This paper presents a method to design a Power Oscillation Damper (POD) for Double-Fed Induction Generator (DFIG) based Wind Energy Conversion System (WECS), operating with voltage control loop. Based on eigen values information from Small Signal Stability ... Keywords: Computational Intelligence, double fed induction generator, power oscillation damper, modified particle swarm optimizer, small signal stability analysis, wind energy conversion system

Huazhang Huang; C. Y. Chung

2012-05-01T23:59:59.000Z

228

Recent progress in zirconia-based fuel cells for power generation  

SciTech Connect

High temperature solid oxide fuel cells based upon yttria-stabilized zirconia electrolyte offer a clean, pollution-free technology to electrochemically generate electricity at high efficiencies. This paper reviews the designs, materials and fabrication processes used for such fuel cells. Most progress to date has been achieved with tubular geometry cells. A large number of tubular cells have been electrically tested, some to times up to 30,000 hours; these cells have shown excellent performance and performance stability. In addition, successively larger size electric generators utilizing these cells have been designed, built and operated since 1984. Two 25 kW power generation field test units have recently been fabricated; these units represent a major milestone in the commercialization of zirconia-based fuel cells for power generation.

Singhal, S.C.

1992-12-01T23:59:59.000Z

229

Recent progress in zirconia-based fuel cells for power generation  

SciTech Connect

High temperature solid oxide fuel cells based upon yttria-stabilized zirconia electrolyte offer a clean, pollution-free technology to electrochemically generate electricity at high efficiencies. This paper reviews the designs, materials and fabrication processes used for such fuel cells. Most progress to date has been achieved with tubular geometry cells. A large number of tubular cells have been electrically tested, some to times up to 30,000 hours; these cells have shown excellent performance and performance stability. In addition, successively larger size electric generators utilizing these cells have been designed, built and operated since 1984. Two 25 kW power generation field test units have recently been fabricated; these units represent a major milestone in the commercialization of zirconia-based fuel cells for power generation.

Singhal, S.C.

1992-01-01T23:59:59.000Z

230

NETL: News Release - Tax Credit Programs Promote Coal-Based Power  

NLE Websites -- All DOE Office Websites (Extended Search)

14, 2006 14, 2006 Tax Credit Programs Promote Coal-Based Power Generation Technologies Energy Department Assists Internal Revenue Service in Project Selection WASHINGTON, DC - Legislation designed to advance cleaner coal-based power generation and gasification technologies has received a strong response from the coal community, according to the Department of Energy's Office of Fossil Energy. The expected result: increased energy security and improved environmental performance from our Nation's most abundant energy resource. The response flows from the Energy Policy Act of 2005 (EPAct), the first overhaul of America's energy policy since 1992. Passed on July 29, 2005, by the U.S. Congress and signed into law by President Bush on August 8, 2005, the Act focuses on clean energy, efficient energy use, energy conservation, and advanced technologies.

231

TC an intermediate language for programming chip multiprocessors  

E-Print Network (OSTI)

in the MicroGrid project at the University of Amsterdam, which is designing chip multiprocessors based

Jesshope, Chris

232

Rule Based Energy Management and Reporting System (EMRS) Applied to a Large Utility Power Station Complex  

E-Print Network (OSTI)

that result in sudden hot process water swings in a period of less than a minute. Power boilers seldom operate at steady state conditions unless they are base loaded (i.e. the boiler master is placed in ?manual?). It is this variability that makes real... Allocators for an incremental steam change. The revised header controller design integrates three distinct functions. First, the boiler constraint block defines a safe operating envelope. This envelope is defined by a prioritized combination...

Bamber, D.; Childress, R.; Robinson, J.

2004-01-01T23:59:59.000Z

233

Current-based direct power control of a DFIG under unbalanced grid voltage  

Science Journals Connector (OSTI)

Abstract A novel current-based direct power control (CB-DPC) strategy for a grid-connected doubly-fed induction generator (DFIG) is proposed. The reported control scheme is applicable to DFIG-based variable-speed wind turbines that operate under unbalanced network voltages. The required DFIG rotor voltage for precise regulation of the stator active and reactive output powers and accurate elimination of their inherent pulsations are directly obtained using a nonlinear integral sliding-mode control (ISMC) scheme. Compared with other control methods, the proposed strategy is simpler since it is not based on the symmetrical components theory, does not need multiple synchronous coordinate transformations, and only requires DFIG voltage and current values as its inputs. Constant switching frequency of the rotor-side converter (RSC) is achieved by means of space vector pulse-width modulation (SVPWM) technique. Uncertainties in the parameters of the generator are included in the design. A compensation strategy is also proposed for tracking error mitigation of the powers that occur due to elimination of the chattering phenomena in the ISMC scheme. Simulation results on a 2MW DFIG under different operating conditions are presented to validate the effectiveness and robustness of the proposed method.

Mohammad Farshadnia; Seyed Abbas Taher

2014-01-01T23:59:59.000Z

234

Innovative biomass to power conversion systems based on cascaded supercritical CO2 Brayton cycles  

Science Journals Connector (OSTI)

Abstract In the small to medium power range the main technologies for the conversion of biomass sources into electricity are based either on reciprocating internal combustion or organic Rankine cycle engines. Relatively low energy conversion efficiencies are obtained in both systems due to the thermodynamic losses in the conversion of biomass into syngas in the former, and to the high temperature difference in the heat transfer between combustion gases and working fluid in the latter. The aim of this paper is to demonstrate that higher efficiencies in the conversion of biomass sources into electricity can be obtained using systems based on the supercritical closed CO2 Brayton cycles (s-CO2). The s-CO2 system analysed here includes two cascaded supercritical CO2 cycles which enable to overcome the intrinsic limitation of the single cycle in the effective utilization of the whole heat available from flue gases. Both part-flow and simple supercritical CO2 cycle configurations are considered and four boiler arrangements are investigated to explore the thermodynamic performance of such systems. These power plant configurations, which were never explored in the literature for biomass conversion into electricity, are demonstrated here to be viable options to increase the energy conversion efficiency of small-to-medium biomass fired power plants. Results of the optimization procedure show that a maximum biomass to electricity conversion efficiency of 36% can be achieved using the cascaded configuration including a part flow topping cycle, which is approximately 10%-points higher than that of the existing biomass power plants in the small to medium power range.

Giovanni Manente; Andrea Lazzaretto

2014-01-01T23:59:59.000Z

235

A computational framework for risk-based power systems operations under uncertainty. Part I: Theory  

Science Journals Connector (OSTI)

Abstract With larger penetrations of wind power, the uncertainty increases in power systems operations. The wind power forecast errors must be accounted for by adapting existing operating tools or designing new ones. A switch from the deterministic framework used today to a probabilistic one has been advocated. This two-part paper presents a framework for risk-based operations of power systems. This framework builds on the operating risk defined as the probability of the system to be outside the stable operation domain, given probabilistic forecasts for the uncertainty (load and wind power generation levels) and outage rates of chosen elements of the system (generators and transmission lines). This operating risk can be seen as a probabilistic formulation of the N ? 1 criterion. The stable operation domain is defined by voltage-stability limits, small-signal stability limits, thermal stability limits and other operating limits. In Part I of the paper, a previous method for estimating the operating risk is extended by using a new model for the joint distribution of the uncertainty. This new model allows for a decrease in computation time of the method, which allows for the use of later and more up-to-date forecasts. In Part II, the accuracy and the computation requirements of the method using this new model will be analyzed and compared to the previously used model for the uncertainty. The method developed in this paper is able to tackle the two challenges associated with risk-based real-time operations: accurately estimating very low operating risks and doing so in a very limited amount of time.

Camille Hamon; Magnus Perninge; Lennart Söder

2015-01-01T23:59:59.000Z

236

Fuzzy logic controller based power management for a standalone solar/wind/fuel cell fed hybrid system  

Science Journals Connector (OSTI)

This paper proposes a new power conditioner topology with an intelligent power management controller that integrates multiple renewable energy sources such as solar energy wind energy and fuel cell energy with battery backup to make the best use of their operating characteristics and obtain better reliability than that could be obtained by single renewable energy based power supply. The proposed multiple-input converter uses neural network and fuzzy logic controller for maintaining a constant voltage at point of common coupling and efficient power flow control respectively. The power conditioner uses very limited number of switches and promises significant savings in component count and reduced losses. Also fuzzy logic controller based online estimation of state of charge and battery charging is also designed for the battery bank which is suitably connected by the controller to sink or source the input power based on the load requirement. The simulation results of the proposed system prove good in the stability aspect as well.

S. Saravanan; S. Thangavel

2013-01-01T23:59:59.000Z

237

RTDS-Based Design and Simulation of Distributed P-Q Power Resources in Smart Grid  

E-Print Network (OSTI)

in a distribution substation," IEEE Trans. on Power Systems,power peak load shaving at substation, reactive power peakload shaving at iv substation, and voltage regulation. We

Taylor, Zachariah David

2014-01-01T23:59:59.000Z

238

RTDS-Based Design and Simulation of Distributed P-Q Power Resources in Smart Grid  

E-Print Network (OSTI)

with energy storage in wind power generation,” in Proc. ofside management for wind power integration in microgridstorage coordinated with wind power under electricity market

Taylor, Zachariah David

2014-01-01T23:59:59.000Z

239

538 IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 20, NO. 2, MAY 2005 Modern Laboratory-Based Education for Power  

E-Print Network (OSTI)

drives. To address this need in a revised electric machinery cur- riculum, we asked the question, "What for Power Electronics and Electric Machines Robert S. Balog, Student Member, IEEE, Zakdy Sorchini, Student be an integral component of a power electronics and electric machines curriculum. However, before a single watt

Kimball, Jonathan W.

240

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 54, NO. 1, FEBRUARY 2007 97 Distributed Intelligent Energy Management System  

E-Print Network (OSTI)

-ca- pacitors, and flywheels, makes the Microgrid a very promising option for on-site power generation are very important for the Micro- grid. The majority of microsources must be power electronic based and the grid. The advantages and considerations of HFAC system will be addressed in this paper along

Simões, Marcelo Godoy

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Modeling, control, and power management of a power electrical system including two distributed generators based on fuel cell and supercapacitor  

Science Journals Connector (OSTI)

This paper focuses on Distributed Generator (DG) integration in Power Electrical System (PES) for dispersed nodes. The main objective of the DG use can be classified into two aspects: a load following service and ancillary service systems. In this study the DG system contains a Fuel cell and a Supercapacitor storage device. A gas turbine system is modeled in order to estimate the PES frequency behavior under a variable power demand. The main goal of this work is to develop a DG control strategy with the aim to smooth the frequency and the voltage peak variations. To assess the different management stages the power flow exchanged between DGs and PES is depicted and discussed for different power demand variations. The results found with the DGs integration strategy confirm the frequency and voltage regulations and also prove the well power flow management.

L. Krichen

2013-01-01T23:59:59.000Z

242

A novel approach for efficiency assessment of conventional power plants based on principal component analysis  

Science Journals Connector (OSTI)

The investigation of performance efficiency and productivity in power generation sector has become a need due to the importance of energy consumption in the world. Several studies have concentrated on the performance assessment of conventional power plants through mathematical and statistical methods. This paper presents a novel approach based on principal component analysis (PCA) for efficiency assessment of conventional power plants. This study considers the previous approaches, namely: data envelopment analysis (DEA) and PCA for ranking of decision-making units (DMUs). The applicability and superiority of the proposed approach is shown for 15 actual conventional power plants. We also applied the proposed approach to other datasets in previous studies to show its advantages. The numerical results showed that the proposed approach provides better solution than previous studies. It has been shown that in some cases the effect of the number of efficient units is contrary to what previous studies have already predicted. Moreover, the results of the novel approach provide better rankings than previous studies.

Ali Azadeh; Mahmoud Ghiasi Moaser

2010-01-01T23:59:59.000Z

243

Photovoltaic array driven adjustable speed heat pump and power system scheme for a lunar based habitat  

SciTech Connect

A high reliability power system scheme, incorporating a photovoltaic power supply and adjustable speed heat pump for life support is presented in this paper. Initial design guidelines and also a description of the state of technology available is presented herein. The power supply scheme will be used as input to an Adjustable Speed Drive (ASD) which will be driving a heat pump. A brief study of various aspects of ASDs is presented, further a summary of the relative merits of different ASD systems presently in vogue is discussed. The advantages of using microcomputer based ASDs is widely understood and accepted. Of the three most popular drive systems, namely the Induction Motor Drive, Switched Reluctance Motor Drive and Brushless DC Motor Drive, any one may be chosen. The choice would depend on the nature of the application and its requirements. The suitability of the above mentioned drive systems and control techniques for a photovoltaic array driven ASD for an aerospace application are discussed. Also discussed are several possible power system designs for a potential lunar habitat.

Domijan, A. Jr.; Buchh, T.A. [Univ. of Florida, Gainesville, FL (United States). Dept. of Electrical and Computer Engineering] [Univ. of Florida, Gainesville, FL (United States). Dept. of Electrical and Computer Engineering

1998-12-01T23:59:59.000Z

244

Agent-Based Modleing of Power Plants Placement to Evaluate the Clean Energy Standard Goal  

SciTech Connect

There is a political push for utilities to supply a specified share of their electricity sales from clean energy resources under the clean energy standard (CES). The goal is to achieve 80% clean energy by 2035. However, there are uncertainties about the ability of the utility industry to ramp up quickly even with the incentives that will be provided. Water availability from the streams is one of the major factors. The contiguous United States is divided into eighteen water regions, and multiple states share water from a single water region. Consequently, water usage decisions made in one state (located upstream of a water region that crosses multiple states) will greatly impact what is available downstream in another state. In this paper, an agent-based modeling approach is proposed to evaluate the clean energy standard goal for water-dependent energy resources. Specifically, using a water region rather than a state boundary as a bounding envelope for the modeling and starting at the headwaters, virtual power plants are placed based on the conditions that there is: (i) suitable land to site a particular power plant, (ii) enough water that meet regulatory guidelines within 20 miles of the suitable land, and (iii) a 20-mile buffer zone from an existing or a virtual power plant. The results obtained are discussed in the context of the proposed clean energy standard goal for states that overlap with one water region.

Omitaomu, Olufemi A [ORNL] [ORNL

2014-01-01T23:59:59.000Z

245

Power scaling analysis of fiber lasers and amplifiers based on non-silica materials  

SciTech Connect

A developed formalism for analyzing the power scaling of diffraction limited fiber lasers and amplifiers is applied to a wider range of materials. Limits considered include thermal rupture, thermal lensing, melting of the core, stimulated Raman scattering, stimulated Brillouin scattering, optical damage, bend induced limits on core diameter and limits to coupling of pump diode light into the fiber. For conventional fiber lasers based upon silica, the single aperture, diffraction limited power limit was found to be 36.6kW. This is a hard upper limit that results from an interaction of the stimulated Raman scattering with thermal lensing. This result is dependent only upon physical constants of the material and is independent of the core diameter or fiber length. Other materials will have different results both in terms of ultimate power out and which of the many limits is the determining factor in the results. Materials considered include silica doped with Tm and Er, YAG and YAG based ceramics and Yb doped phosphate glass. Pros and cons of the various materials and their current state of development will be assessed. In particular the impact of excess background loss on laser efficiency is discussed.

Dawson, J W; Messerly, M J; Heebner, J E; Pax, P H; Sridharan, A K; Bullington, A L; Beach, R J; Siders, C W; Barty, C P; Dubinskii, M

2010-03-30T23:59:59.000Z

246

RTDS-Based Design and Simulation of Distributed P-Q Power Resources in Smart Grid  

E-Print Network (OSTI)

Danish island of Bornholm power grid," in Proc. of the IEEEsimulate the operation of power grid more accurately. In [

Taylor, Zachariah David

2014-01-01T23:59:59.000Z

247

Radiation power and linewidth of a semifluxon-based Josephson oscillator  

SciTech Connect

We demonstrate a high-frequency generator operating at ?200?GHz based on flipping a semifluxon in a Josephson junction of moderate normalized length. The semifluxon spontaneously appears at the ? discontinuity of the Josephson phase artificially created by means of two tiny current injectors. The radiation is detected by an on-chip detector (tunnel junction). The estimated radiation power (at the detector) is ?8?nW and should be compared with the dc power of ?100?nW consumed by the generator. The measured radiation linewidth, as low as 1.1?MHz, is typical for geometrical (Fiske) resonances, although we tried to suppress such resonances by placing well-matched microwave transformers at its both ends. Making use of a phase-locking feedback loop, we are able to reduce the radiation linewidth to less than 1?Hz measured relative to the reference oscillator and defined just by the resolution of our measurement setup.

Paramonov, M.; Fominsky, M. Yu.; Koshelets, V. P. [Kotel'nikov Institute of Radioengineering and Electronics RAS, Mokhovaya 11, 125009 Moscow (Russian Federation); Neumeier, B.; Koelle, D.; Kleiner, R.; Goldobin, E. [Physikalisches Institut and Center for Collective Quantum Phenomena in LISA, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen (Germany)

2014-02-10T23:59:59.000Z

248

A High Performance Computing Platform for Performing High-Volume Studies With Windows-based Power Grid Tools  

SciTech Connect

Serial Windows-based programs are widely used in power utilities. For applications that require high volume simulations, the single CPU runtime can be on the order of days or weeks. The lengthy runtime, along with the availability of low cost hardware, is leading utilities to seriously consider High Performance Computing (HPC) techniques. However, the vast majority of the HPC computers are still Linux-based and many HPC applications have been custom developed external to the core simulation engine without consideration for ease of use. This has created a technical gap for applying HPC-based tools to today’s power grid studies. To fill this gap and accelerate the acceptance and adoption of HPC for power grid applications, this paper presents a prototype of generic HPC platform for running Windows-based power grid programs on Linux-based HPC environment. The preliminary results show that the runtime can be reduced from weeks to hours to improve work efficiency.

Chen, Yousu; Huang, Zhenyu

2014-08-31T23:59:59.000Z

249

Power combination of two phase-locked high power microwave beams from a new coaxial microwave source based on dual beams  

SciTech Connect

The new coaxial high power microwave source based on dual beams has demonstrated two phase-locked output microwave beams generated by its two sub-sources. In order to achieve a single higher output power, we present a three-port waveguide-based power combiner to combine the two microwave beams. Particle-in-cell simulation results show that when the diode voltage is 675?kV and the guiding magnetic field is 0.8?T, a combined microwave with an average power of about 4.0?GW and a frequency of 9.74 GHz is generated; the corresponding power conversion efficiency is 29%. The combination effect of the combiner is further validated in the diode voltage range from 675?kV to 755?kV as well as in the pulse regime. The simulations indicate that the maximum surface axial electric field strength of the electrodynamic structure is 720?kV/cm, which is relatively low corresponding to an output power of 4.0?GW. The stable combined output suggests the probability of long-pulse operation for the combined source.

Li, Yangmei; Zhang, Xiaoping, E-mail: plinafly@163.com; Zhang, Jiande; Dang, Fangchao; Yan, Xiaolu [College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

2014-10-15T23:59:59.000Z

250

PR-EDB: Power Reactor Embrittlement Data Base, Version 2. Revision 2, Program description  

SciTech Connect

Investigations of regulatory issues such as vessel integrity over plant life, vessel failure, and sufficiency of current codes Standard Review Plans (SRP`s) and Guides for license renewal can be greatly expedited by the use of a well-designed computerized data base. Also, such a data base is essential for the validation of embrittlement prediction models by researchers. The Power Reactor Embrittlement Data Base (PR-EDB) is such a comprehensive collection of data for US commercial nuclear reactors. The current version of the PR-EDB contains the Charpy test data that were irradiated in 252 capsules of 96 reactors and consists of 207 data points for heat-affected-zone (HAZ) materials (98 different HAZ), 227 data points for weld materials (105 different welds), 524 data points for base materials (136 different base materials), including 297 plate data points (85 different plates), 119 forging data points (31) different forging), and 108 correlation monitor materials data points (3 different plates). The data files are given in dBASE format and can be accessed with any computer using the DOS operating system. ``User-friendly`` utility programs are used to retrieve and select specific data, manipulate data, display data to the screen or printer, and to fit and plot Charpy impact data. The results of several studies investigated are presented in Appendix D.

Stallmann, F.W.; Wang, J.A.; Kam, F.B.K.; Taylor, B.J. [Oak Ridge National Lab., TN (United States)] [Oak Ridge National Lab., TN (United States)

1994-01-01T23:59:59.000Z

251

Design optimization methodology for power converters based on global energy requirement criteria. Application to a DC-DC flyback structure  

E-Print Network (OSTI)

for power electronic converters according to the Global Energy Requirement (GER) criterion, i.e. the primary-design converters in order to take its environmental impacts (here, only its global primary energy consumptionDesign optimization methodology for power converters based on global energy requirement criteria

Paris-Sud XI, Université de

252

Title: Sustainable Communities Based on a New Clean Energy Source -Marine & Hydrokinetic Power: Roosevelt Island and Beyond  

E-Print Network (OSTI)

Title: Sustainable Communities Based on a New Clean Energy Source - Marine & Hydrokinetic Power Earth Hour "a symbol of our commitment to sustainable energy for all," and underscored the need to "fuel hydrokinetic farm in the U.S. Verdant envisions marine & hydrokinetic (MHK) power as the basis of a new local

Angenent, Lars T.

253

Heat pipe based passive emergency core cooling system for safe shutdown of nuclear power reactor  

Science Journals Connector (OSTI)

Abstract On March 11th, 2011, a natural disaster created by earthquakes and Tsunami caused a serious potential of nuclear reactor meltdown in Fukushima due to the failure of Emergency Core Cooling System (ECCS) powered by diesel generators. In this paper, heat pipe based ECCS has been proposed for nuclear power plants. The designed loop type heat pipe ECCS is composed of cylindrical evaporator with 62 vertical tubes, each 150 mm diameter and 6 m length, mounted around the circumference of nuclear fuel assembly and 21 m × 10 m × 5 m naturally cooled finned condenser installed outside the primary containment. Heat pipe with overall thermal resistance of 1.44 × 10?5 °C/W will be able to reduce reactor temperature from initial working temperature of 282 °C to below 250 °C within 7 h. The overall ECCS also includes feed water flooding of the core using elevated water tank for initial 10 min which will accelerate cooling of the core, replenish core coolant during loss of coolant accident and avoids heat transfer crisis phenomena during heat pipe start-up process. The proposed heat pipe system will operate in fully passive mode with high runtime reliability and therefore provide safer environment to nuclear power plants.

Masataka Mochizuki; Randeep Singh; Thang Nguyen; Tien Nguyen

2014-01-01T23:59:59.000Z

254

A neural network based approach to estimate of power system harmonics for an induction furnace under the different load conditions  

Science Journals Connector (OSTI)

This study presents an artificial neural network based intelligent monitoring algorithm to detect of a power system harmonics. The proposed approach was tested on the current and voltage data of an induction furn...

Hayrettin Gokozan; Sezai Taskin; Serhat Seker; Huseyin Ekiz

2014-11-01T23:59:59.000Z

255

A practical approach to risk-based inservice inspection in U.S. nuclear power plants  

SciTech Connect

To provide guidelines for practical implementation of risk-based ISI, EPRI sponsored work to develop evaluation procedures and criteria for defining risk-based inservice inspection programs for nuclear power plant piping. These procedures and criteria include efficient means to identify risk significant piping segments, inspection locations, and available inspection techniques. These procedures were applied in a pilot study to assess the feasibility of successfully implementing risk-based inservice inspection programs at nuclear plants. The results from the pilot study indicate that implementation of risk-based inservice inspection programs can reduce the cost and radiation exposure associated with inservice inspection, while maintaining a high level of safety. The list of references provides additional details of these procedures and plant-specific applications. Also, an EPRI technical report has been published to document these procedures. Software has been developed to support and fully document this procedure. Additional development is adding an expert system to the present data base system. The approach compares well to approaches used (or being considered) in other industries and can easily be adapted to these other industries and to address economic and personnel safety in addition to public safety measures.

Gosselin, S.R. [Electric Power Research Inst., Charlotte, NC (United States); Gamble, R. [Sartrex Corp., Rockville, MD (United States); Dimitrijevic, V.B.; O`Regan, P.J.; Chapman, J.R. [Yankee Atomic Electric Co., Bolton, MS (United States)

1996-12-01T23:59:59.000Z

256

A Silicon-Based Micro Gas Turbine Engine for Power Generation  

E-Print Network (OSTI)

This paper reports on our research in developing a micro power generation system based on gas turbine engine and piezoelectric converter. The micro gas turbine engine consists of a micro combustor, a turbine and a centrifugal compressor. Comprehensive simulation has been implemented to optimal the component design. We have successfully demonstrated a silicon-based micro combustor, which consists of seven layers of silicon structures. A hairpin-shaped design is applied to the fuel/air recirculation channel. The micro combustor can sustain a stable combustion with an exit temperature as high as 1600 K. We have also successfully developed a micro turbine device, which is equipped with enhanced micro air-bearings and driven by compressed air. A rotation speed of 15,000 rpm has been demonstrated during lab test. In this paper, we will introduce our research results major in the development of micro combustor and micro turbine test device.

Shan, X -C; Maeda, R; Sun, Y F; Wu, M; Hua, J S

2007-01-01T23:59:59.000Z

257

4 - Hydrogen production in conventional, bio-based and nuclear power plants  

Science Journals Connector (OSTI)

Abstract: A hydrogen economy advent cannot be based on the current processes and plants, but will need to take advantage of distributed generation systems and to exploit the potential of hydrogen generation in synergy with large electricity or heat generation plants, provided their CO2 emissions are intrinsically low or are abated by means of carbon capture and/or sequestration (CCS) systems. This chapter will focus on real carbon-based energy process appliances and new business cases. A section is also devoted to CCS technologies. Finally, the simultaneous production of hydrogen and power from nuclear plants will be reviewed from a technical point of view, and its future potential impact on the hydrogen economy will be evaluated.

D. Fino

2014-01-01T23:59:59.000Z

258

A Novel High-Power-Factor LED-Lamp Driver Based on a Single-Stage Power Conversion  

Science Journals Connector (OSTI)

This paper proposes a novel single-stage driver for supplying a T8-type light-emitting diode (LED) lamp with high power factor. The presented driver integrates a dual buck-boost converter with coupled inductors and a half-bridge series-resonant converter ... Keywords: converter, driver, light-emitting diode (LED)

Chun An Cheng, En Chih Chang, Ching Shien Tseng, Tsung Yuan Chung

2014-06-01T23:59:59.000Z

259

Resiliency Analysis of Large-Scale Renewable Enriched Power Grid: A Network Percolation-Based Approach  

Science Journals Connector (OSTI)

Recent trend of integrating renewable energy into the power grid poses new challenges like power quality, voltage ... . The trouble encountered in analyzing systems like power grid is that individual behavior of ...

A. B. M. Nasiruzzaman; H. R. Pota

2014-01-01T23:59:59.000Z

260

Estimation of the recycled power associated with the cryogenic refrigeration power of a fusion reactor based on TORE SUPRA experiment and ITER design  

Science Journals Connector (OSTI)

The refrigeration power associated with the superconducting magnets and cryopumps of a steady-state fusion reactor is not negligible. The power has to be minimized because it plays a role in the power station global efficiency and in the required amplification factor Q. On the one hand, the long plasma discharges obtained in December 2003 on TORE SUPRA give an insight of the cryogenic losses that might be expected for a steady-state fusion reactor equipped with superconducting magnets. The superfluid bath of the windings in TORE SUPRA allows a simple calorimetric estimation of the cryogenic losses through the temperature evolution of the bath during the long discharge. The different kinds of losses in TORE SUPRA are estimated, discussed and explained. Not all of them will be present in a real reactor. On the other hand, in the framework of ITER preparation, the magnet system and the associated refrigerator have been dimensioned taking into account again all kinds of cold losses. This exercise is important because ITER, by its size, could be relevant to the steady-state reactor situation regarding refrigeration. Based on TORE SUPRA experiment and ITER design it is, therefore, possible to propose for the first time a preliminary figure for the cryoplant power of a steady-state reactor. The order of magnitude of the cryoplant power is ten times lower than that of the fusion reactor recycled power which can be considered acceptable.

J.L. Duchateau; J.Y. Journeaux; F. Millet

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Reviewing PSA-based analyses to modify technical specifications at nuclear power plants  

SciTech Connect

Changes to Technical Specifications (TSs) at nuclear power plants (NPPs) require review and approval by the United States Nuclear Regulatory Commission (USNRC). Currently, many requests for changes to TSs use analyses that are based on a plant`s probabilistic safety assessment (PSA). This report presents an approach to reviewing such PSA-based submittals for changes to TSs. We discuss the basic objectives of reviewing a PSA-based submittal to modify NPP TSs; the methodology of reviewing a TS submittal, and the differing roles of a PSA review, a PSA Computer Code review, and a review of a TS submittal. To illustrate this approach, we discuss our review of changes to allowed outage time (AOT) and surveillance test interval (STI) in the TS for the South Texas Project Nuclear Generating Station. Based on this experience gained, a check-list of items is given for future reviewers; it can be used to verify that the submittal contains sufficient information, and also that the review has addressed the relevant issues. Finally, recommended steps in the review process and the expected findings of each step are discussed.

Samanta, P.K.; Martinez-Guridi, G. [Brookhaven National Lab., Upton, NY (United States); Vesely, W.E. [Science Applications International Corporation, Dublin, OH (United States)

1995-12-01T23:59:59.000Z

262

Statistical Profiling-based Techniques for Effective Power Provisioning in Data Centers  

E-Print Network (OSTI)

, Reliability Keywords: Data center, Power Provisioning, Power supply hierarchy, Prediction, Profiling 1-scale academic, research and, industrial data centers have grown at a rapid pace. The fast-growing power is equiva- lent to that of the aviation industry. While the increase in power consumption per

Urgaonkar, Bhuvan

263

Silicon-on-insulator-based high-voltage, high-temperature integrated circuit gate driver for silicon carbide-based power field effect transistors  

SciTech Connect

Silicon carbide (SiC)-based field effect transistors (FETs) are gaining popularity as switching elements in power electronic circuits designed for high-temperature environments like hybrid electric vehicle, aircraft, well logging, geothermal power generation etc. Like any other power switches, SiC-based power devices also need gate driver circuits to interface them with the logic units. The placement of the gate driver circuit next to the power switch is optimal for minimising system complexity. Successful operation of the gate driver circuit in a harsh environment, especially with minimal or no heat sink and without liquid cooling, can increase the power-to-volume ratio as well as the power-to-weight ratio for power conversion modules such as a DC-DC converter, inverter etc. A silicon-on-insulator (SOI)-based high-voltage, high-temperature integrated circuit (IC) gate driver for SiC power FETs has been designed and fabricated using a commercially available 0.8--m, 2-poly and 3-metal bipolar-complementary metal oxide semiconductor (CMOS)-double diffused metal oxide semiconductor (DMOS) process. The prototype circuit-s maximum gate drive supply can be 40-V with peak 2.3-A sourcing/sinking current driving capability. Owing to the wide driving range, this gate driver IC can be used to drive a wide variety of SiC FET switches (both normally OFF metal oxide semiconductor field effect transistor (MOSFET) and normally ON junction field effect transistor (JFET)). The switching frequency is 20-kHz and the duty cycle can be varied from 0 to 100-. The circuit has been successfully tested with SiC power MOSFETs and JFETs without any heat sink and cooling mechanism. During these tests, SiC switches were kept at room temperature and ambient temperature of the driver circuit was increased to 200-C. The circuit underwent numerous temperature cycles with negligible performance degradation.

Tolbert, Leon M [ORNL; Huque, Mohammad A [ORNL; Blalock, Benjamin J [ORNL; Islam, Syed K [ORNL

2010-01-01T23:59:59.000Z

264

MODEL AND BEAM BASED SETUP PROCEDURES FOR A HIGH POWER HADRON SUPERCONDUCTING LINAC  

SciTech Connect

This presentation will review methods for experimental determination of optimal operational set points in a multi-cavity superconducting high power hadron linac. A typical tuning process is based on comparison between measured data and the results of simulations from envelope and single-particle models. Presence of significant space charge effects requires simulation and measurement of bunch dynamics in 3 dimensions to ensure low loss beam transport. This is especially difficult in a superconducting linac where use of interceptive diagnostics is usually restricted because of the risk of SRF cavity surface contamination. The procedures discussed here are based on non-interceptive diagnostics such as beam position monitors and laser wires, and conventional diagnostics devices such as wire scanners and bunch shape monitors installed outside the superconducting linac. The longitudinal Twiss analysis based on the BPM signals will be described. The superconducting SNS linac tuning experience will be used to demonstrate problems and their solution for real world linac tune-up procedures

Shishlo, Andrei P [ORNL

2014-01-01T23:59:59.000Z

265

System and method for controlling power consumption in a computer system based on user satisfaction  

DOE Patents (OSTI)

Systems and methods for controlling power consumption in a computer system. For each of a plurality of interactive applications, the method changes a frequency at which a processor of the computer system runs, receives an indication of user satisfaction, determines a relationship between the changed frequency and the user satisfaction of the interactive application, and stores the determined relationship information. The determined relationship can distinguish between different users and different interactive applications. A frequency may be selected from the discrete frequencies at which the processor of the computer system runs based on the determined relationship information for a particular user and a particular interactive application running on the processor of the computer system. The processor may be adapted to run at the selected frequency.

Yang, Lei; Dick, Robert P; Chen, Xi; Memik, Gokhan; Dinda, Peter A; Shy, Alex; Ozisikyilmaz, Berkin; Mallik, Arindam; Choudhary, Alok

2014-04-22T23:59:59.000Z

266

Probability-Based Software for Grid Optimization: Improved Power System Operations Using Advanced Stochastic Optimization  

SciTech Connect

GENI Project: Sandia National Laboratories is working with several commercial and university partners to develop software for market management systems (MMSs) that enable greater use of renewable energy sources throughout the grid. MMSs are used to securely and optimally determine which energy resources should be used to service energy demand across the country. Contributions of electricity to the grid from renewable energy sources such as wind and solar are intermittent, introducing complications for MMSs, which have trouble accommodating the multiple sources of price and supply uncertainties associated with bringing these new types of energy into the grid. Sandia’s software will bring a new, probability-based formulation to account for these uncertainties. By factoring in various probability scenarios for electricity production from renewable energy sources in real time, Sandia’s formula can reduce the risk of inefficient electricity transmission, save ratepayers money, conserve power, and support the future use of renewable energy.

None

2012-02-24T23:59:59.000Z

267

Journal of Power Sources 162 (2006) 388399 Model-based condition monitoring of PEM fuel cell using  

E-Print Network (OSTI)

Journal of Power Sources 162 (2006) 388­399 Model-based condition monitoring of PEM fuel cell using of polymer electrolyte membrane (PEM) fuel cell systems, temporary faults in such systems still might occur/uncertainty of the fuel cell system, and the measurement noise. In this research, we propose a model-based condition

Ding, Yu

268

COMPUTER-BASED PROCEDURE FOR FIELD ACTIVITIES: RESULTS FROM THREE EVALUATIONS AT NUCLEAR POWER PLANTS  

SciTech Connect

Nearly all activities that involve human interaction with the systems of a nuclear power plant are guided by procedures. The paper-based procedures (PBPs) currently used by industry have a demonstrated history of ensuring safety; however, improving procedure use could yield tremendous savings in increased efficiency and safety. One potential way to improve procedure-based activities is through the use of computer-based procedures (CBPs). Computer-based procedures provide the opportunity to incorporate context driven job aids, such as drawings, photos, just-in-time training, etc into CBP system. One obvious advantage of this capability is reducing the time spent tracking down the applicable documentation. Additionally, human performance tools can be integrated in the CBP system in such way that helps the worker focus on the task rather than the tools. Some tools can be completely incorporated into the CBP system, such as pre-job briefs, placekeeping, correct component verification, and peer checks. Other tools can be partly integrated in a fashion that reduces the time and labor required, such as concurrent and independent verification. Another benefit of CBPs compared to PBPs is dynamic procedure presentation. PBPs are static documents which limits the degree to which the information presented can be tailored to the task and conditions when the procedure is executed. The CBP system could be configured to display only the relevant steps based on operating mode, plant status, and the task at hand. A dynamic presentation of the procedure (also known as context-sensitive procedures) will guide the user down the path of relevant steps based on the current conditions. This feature will reduce the user’s workload and inherently reduce the risk of incorrectly marking a step as not applicable and the risk of incorrectly performing a step that should be marked as not applicable. As part of the Department of Energy’s (DOE) Light Water Reactors Sustainability Program, researchers at Idaho National Laboratory (INL) along with partners from the nuclear industry have been investigating the design requirements for computer-based work instructions (including operations procedures, work orders, maintenance procedures, etc.) to increase efficiency, safety, and cost competitiveness of existing light water reactors.

Oxstrand, Johanna [Idaho National Laboratory; Bly, Aaron [Idaho National Laboratory; LeBlanc, Katya [Idaho National Laboratory

2014-09-01T23:59:59.000Z

269

IEEE PHOTONICS TECHNOLOGY LETTERS 1 High-Power 2.3-m GaSb-Based Linear Laser Array  

E-Print Network (OSTI)

2.3-m laser. Al Ga As Sb cladding layers. Details of the lasers' heterostructure design can be foundIEEE PHOTONICS TECHNOLOGY LETTERS 1 High-Power 2.3-m GaSb-Based Linear Laser Array L. Shterengas, G--High-power 2.3- m In(Al)GaAsSb­GaSb type-I double quantum-well diode laser arrays were fabricated

270

Development of a Web-based Emissions Reduction Calculator for Green Power Purchases from Texas Wind Energy Providers  

E-Print Network (OSTI)

DEVELOPMENT OF A WEB-BASED, EMISSIONS REDUCTION CALCULATOR FOR GREEN POWER PURCHASES FROM TEXAS WIND ENERGY PROVIDERS Zi Liu, Ph.D. Research Engineer Jeff S. Haberl, Ph.D., P.E. Professor/Assc. Director Juan... that have been developed to calculate the emissions reductions from electricity provided by wind energy providers in the Texas ERCOT region, including an analysis of actual hourly wind power generated from a wind turbine in Randall County, Texas...

Liu, Z.; Baltazar-Cervantes, J. C.; Gilman, D.; Haberl, J.; Culp, C.

2005-01-01T23:59:59.000Z

271

Environmental assessment of a membrane-based air separation for a coal-fired oxyfuel power plant  

Science Journals Connector (OSTI)

Abstract CO2 reduction from fossil-fired power plants can be achieved by carbon dioxide capture and storage (CCS). Among different CO2 capture technologies for power plants the oxyfuel power plant concept is a promising option. High temperature ceramic membranes for oxygen production have the potential to reduce the associated efficiency losses significantly compared to conventional air separation using cryogenic techniques. Focus of this paper is the environmental performance of membrane-based oxygen production for oxyfuel power plant technology. Included into the analysis are the production of the perovskite membrane (BSCF=Ba0.5Sr0.5Co0.8Fe0.2O3??), the incorporation into a steel module, and the integration of several modules into an oxyfuel power plant. The membrane-based oxygen production is compared to the conventional cryogenic air separation in oxyfuel power plants in an ecological way. The evaluation is performed using life cycle assessment (LCA) methodology from “cradle to grave”. The share in the overall environmental impacts of respective life cycle elements like membrane and module production but also coal supply processes as well as the operation of the oxyfuel power plant are identified. Sensitivity analyses referring to life-time, permeability and housing conditions of the membranes set benchmarks for further membrane development.

Andrea Schreiber; Josefine Marx; Petra Zapp

2013-01-01T23:59:59.000Z

272

Economic analysis of coal-based polygeneration system for methanol and power production  

Science Journals Connector (OSTI)

Polygeneration system for chemical and power co-production has been regarded as one of promising technologies to use fossil fuel more efficiently and cleanly. In this paper the thermodynamic and economic performances of three types of coal-based polygeneration system were investigated and the influence of energy saving of oxygenation systems on system economic performance was revealed. The primary cost saving ratio (PCS) is presented as a criterion, which represents the cost saving of polygeneration system compared with the single-product systems with the same products outputs, to evaluate economic advantages of polygeneration system. As a result, the system, adopting un-reacted syngas partly recycled to the methanol synthesis reactor and without the shift process, can get the optimal PCS of 11.8%, which results from the trade-off between the installed capital cost saving and the energy saving effects on the cost saving, and represents the optimal coupling relationship among chemical conversion, energy utilization and economic performance. And both of fuel price and the level of equipment capital cost affect on PCS faintly. This paper provides an evaluation method for polygeneration systems based on both technical and economic viewpoints.

Hu Lin; Hongguang Jin; Lin Gao; Wei Han

2010-01-01T23:59:59.000Z

273

Decision of the Wind Power Projects Based on Cost-Efficient Method  

Science Journals Connector (OSTI)

To start from the investment characteristics of wind power projects, account for wind power projects in the life-cycle costs and project income, decision analysis and application of cost-effectiveness of wind pow...

Gao Hong; Gao Wu; Lu Guo

2013-01-01T23:59:59.000Z

274

Comparison of LOLE and EUE-Based Wind Power Capacity Credits by Probabilistic Production Simulation  

Science Journals Connector (OSTI)

To mitigate the global climate change and environmental issues, wind power generation is growing at a startling pace around the world. The wind power capacity credit can be used to measure the contribution of wind

Shaohua Zhang; Chen Zhao; Xue Li

2012-01-01T23:59:59.000Z

275

Review of the Power Grid Model Vulnerability Based on Complex Network Theory  

Science Journals Connector (OSTI)

Topology structure of power grid has intrinsic and substantial characteristics which if once ascertained in the build of the power grid will have crucial impact on its performance. ... paper, some network models ...

Zhiguo Ding; Minrui Fei

2012-01-01T23:59:59.000Z

276

Environmental performance of power generation system in China based on LCA  

Science Journals Connector (OSTI)

In this study LCA (life cycle assessment) is used as a tool for the assessment of energy consumption and associated impacts generated from utilization of energy in various power generation systems in China. The details follow the methodology outlined in ISO14040. The scope of this research includes energy production energy transportation and energy utilization. The function unit of life cycle inventory is 1 kJ electricity power. Most of the inventory data have been collected from Yearbook of China. Compared to fuel?fired power generation system hydropower and nuclear power are more environment?friendly according to life cycle inventory analysis results so increasing the proportion of hydropower and nuclear power in the power industry has a significant improvement effect on the development of China’s power industry. The life cycle environmental impact of integrated power generation level in 2010 will be 13.8% lower than in 1999 according to National energy policy of China.

Xing Su; Xu Zhang; Yuan Yuan

2010-01-01T23:59:59.000Z

277

Static Security Analysis of the Regional Power Grid Based on the Busbar Automatic Transfer Switch  

Science Journals Connector (OSTI)

In order to solve the inapplicability of the transmission grid N-1 criterion in the regional power grid which is running with a large number ... BATS device into use after the regional power grid failure, we come...

Liang Zhao; Jian Zhang; He Zhu…

2014-01-01T23:59:59.000Z

278

RTDS-Based Design and Simulation of Distributed P-Q Power Resources in Smart Grid  

E-Print Network (OSTI)

1.2 MW grid-connected solar panel at bus 8. The power outputis as in Figure 5.11 [104]. Solar Panel Power Injection (pu)The daily output of the solar panel during a cloudy day.

Taylor, Zachariah David

2014-01-01T23:59:59.000Z

279

Power system fault analysis based on intelligent techniques and intelligent electronic device data  

E-Print Network (OSTI)

This dissertation has focused on automated power system fault analysis. New contributions to fault section estimation, protection system performance evaluation and power system/protection system interactive simulation have been achieved. Intelligent...

Luo, Xu

2007-09-17T23:59:59.000Z

280

Energy Management Using Storage Batteries in Large Commercial Facilities Based on Projection of Power Demand  

Science Journals Connector (OSTI)

This study provides three methods for projection of power demand of large commercial facilities planned for construction, ... the operation algorithm of storage batteries to manage energy and minimize power costs...

Kentaro Kaji; Jing Zhang; Kenji Tanaka

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

North Carolina State University | College of Engineering | 919-515-3480 | www.ncsc.ncsu.edu North Carolina State University, Campus Box 7409, Raleigh, NC 27695 | shannon_helm@ncsu.edu | www.ncsc.ncsu.edu  

E-Print Network (OSTI)

Combined Heat & Power Waste Heat Recovery District Energy Smart grid/Micro-grid Clean Transportation). Project evaluation/feasibility studies Combined Heat & Power site qualification & feasibility analysis

282

Multi-source power manager for super-capacitor based energy harvesting WSN  

Science Journals Connector (OSTI)

In this paper, a multi-source power manager (PM) is applied using different types of energy harvesting WSN. Specifically, this PM is embedded in both thermal and solar-powered WSN in order to adapt the consumed energy of the node by changing its wake-up ... Keywords: energy harvesting, energy neutrality, power management

Trong Nhan Le; Alain Pegatoquet; Olivier Berder; Olivier Sentieys

2013-11-01T23:59:59.000Z

283

Voltage quality behaviour of a wind turbine based Remote Area Power System  

Science Journals Connector (OSTI)

The power quality behaviour of a Remote Area Power System (RAPS) consisting of a Doubly Fed Induction Generator (DFIG), its main loads and a dummy load is presented in this paper. The dummy load is used to maintain the power balance of the system under ...

Nishad Mendis; Kashem M. Muttaqi; Sarath Perera

2009-02-01T23:59:59.000Z

284

A Low Power Thyristor-Based CMOS Programmable Delay Element Junmou Zhang  

E-Print Network (OSTI)

voltage to control the delay, exhibiting a low power supply noise sensitivity of 9.43% and a temperature. Simulation results show that the proposed delay element has a lower power supply and temperature sensitivity (¢ £ ¥ § © £ £ ) and is sensitive to power supply noise. Furthermore, the delay of an inverter chain is sensitive to temperature

Friedman, Eby G.

285

Distributed Internet-based Load Altering Attacks against Smart Power Grids  

E-Print Network (OSTI)

to cause circuite overflow or other malfunctions and damage the power system equipments. To gain insights-intrusion attempt may target any sector in a power system: generation, distribution and control, and consumption as shown in Fig. 1. A Type I cyber-attack targets power plants and aims in disrupting or taking over

Mohsenian-Rad, Hamed

286

Design and performance of radioisotope space power systems based on OSC multitube AMTEC converter designs  

SciTech Connect

This paper extends the analytical procedure described in another paper in these proceedings to analyze a variety of compact and light-weight OSC-designed radioisotope-heated generators. Those generators employed General Purpose Heat Source (GPHS) modules and a converter containing sixteen AMTEC cells of OSC`s revised five-tube design with enhanced cell wall reflectivity described in a companion paper in these proceedings. OSC found that the performance of the generator is primarily a function of the thermal insulation between the outside of the generator`s 16 cells and the inside of its wall. After examining a variety of insulation options, it was found that the generator`s performance is optimized by employing a hybrid insulation system, in which the space between the cells is filled with fibrous Min-K insulation, and the generator walls are lined with tapered (i.e., graded-length) multifoil insulation. The OSC design results in a very compact generator, with eight AMTEC cells on each end of the heat source stack. The choice of the five-tube cells makes it possible to expand the BASE tube diameter without increasing the cell diameter. This is important because the eight cells mate well with the stacked GPHS modules. The OSC generator design includes a compliant heat source support and preload arrangement, to hold the heat source modules together during launch, and to maintain thermal contact conductance at the generator`s interfaces despite creep relaxation of its housing. The BOM and EOM (up to 15 years) performances of the revised generators were analyzed for two and three GPHS modules, both for fresh fuel and for aged fuel left over from a spare RTG (Radioisotope Thermoelectric Generator) fueled in 1982. The resulting power outputs were compared with JPL`s latest EOM power demand goals for the Pluto Express and Europa Orbiter missions, and with the generic goals of DOE`s Advanced Radioisotope Power System (ARPS) study. The OSC AMTEC designs yielded system efficiencies three to four times as high as present-generation RTGs.

Schock, A.; Noravian, H.; Or, C. [Orbital Sciences Corp., Germantown, MD (United States)

1997-12-31T23:59:59.000Z

287

Dynamic simulation of an oxygen mixed conducting membrane-based gas turbine power cycle for CO2 capture  

Science Journals Connector (OSTI)

This paper investigates the transient behaviour of an oxygen mixed conducting membrane (OMCM)-based gas turbine (GT) power plant. Several operation and material constraints limit the operability of the power plant. For part-load operation two strategies are analysed: (i) reduction in mass flow of air to the GT in conjunction with reduced fuel supply to the afterburner while keeping the turbine exit temperature (TET) constant (TET control strategy), and (ii) reduction of fuel supply to the afterburner at constant air supply to the GT while the TET is allowed to vary (turbine inlet temperature (TIT) control strategy). Simulation reveals that this GT power plant shows rather slow dynamics because of the recirculation of large amount of gas. The OMCM-based GT power plant is compared to a simple GT power plant with respect to design, off-design as well as transient behaviour during load reduction. Information about controlled and manipulated variables in the GT power plant is given for the development of control strategy.

Konrad Eichhorn Colombo; Olav Bolland

2009-01-01T23:59:59.000Z

288

Environmental externalities: An ASEAN application to coal-based power generation. Extract  

SciTech Connect

Significant benefits to human health that result from emissions control programs may justify the costs of pollution control policies. Many scientists, economists, risk analysts, and policymakers believe that comparisons of the benefits with the costs of pollution control demonstrate that the US stationary source, air emissions control program is justified. This justification is based upon pronounced benefits to human health, especially from controlling suspended particulates and sulfur compounds. Market decisions are usually made on the basis of a consideration of traditional costs such as capital, operating and maintenance, fuel costs, and fixed charges. Social costs, which could be significant, are not incorporated explicitly into such decisions. These social costs could result in a net reduction in the welfare of individuals, and of society as a whole. Because these social costs and their effects are not represented in the price of energy, individual have no way to explicitly value them; hence, they remain unaccounted for in market decisions. By accounting for external costs, the selection of energy sources and production of energy products can lead to and equilibrium, where the total cost of energy and energy products, together with resulting social costs, can be brought to an economic minimum. The concept of an air emissions control program is of interest to the ASEAN countries (Brunei, Indonesia, Malaysia, the Philippines, Singapore, and Thailand) and their governments, especially if such a program could be justified in cost-benefit terms and shown to be directly applicable to ASEAN conditions. It is the intent of the effort described herein to demonstrate that technical options are available to control emissions from coal-based, electric power plants and that that costs of these options may be justified in cost-benefit terms.

Szpunar, C.B.; Gillette, J.L.

1992-06-01T23:59:59.000Z

289

The development of low cost LiFePO4-based high power lithium-ion batteries  

NLE Websites -- All DOE Office Websites (Extended Search)

development of low cost LiFePO4-based high power lithium-ion batteries development of low cost LiFePO4-based high power lithium-ion batteries Title The development of low cost LiFePO4-based high power lithium-ion batteries Publication Type Journal Article Year of Publication 2005 Authors Striebel, Kathryn A., Joongpyo Shim, Azucena Sierra, Hui Yang, Xiangyun Song, Robert Kostecki, and Kathryn N. McCarthy Journal Journal of Power Sources Volume 146 Pagination 33-38 Keywords libob, lifepo4, lithium-ion, post-test, raman spectroscopy Abstract Pouch type LiFePO4-natural graphite lithium-ion cells were cycled at constant current with periodic pulse-power testing in several different configurations. Components were analyzed after cycling with electrochemical, Raman and TEM techniques to determine capacity fade mechanisms. The cells with carbon-coated current collectors in the cathode and LiBOB-salt electrolyte showed the best performance stability. In many cases, iron species were detected on the anodes removed from cells with both TEM and Raman spectroscopy. The LiFePO4 electrodes showed unchanged capacity suggesting that the iron is migrating in small quantities and is acting as a catalyst to destabilize the anode SEI in these cells.

290

Latent Heat Based High Temperature Solar Thermal Energy Storage for Power Generation  

Science Journals Connector (OSTI)

Abstract The design of a phase change material based high temperature solar thermal energy storage device is presented. Said unit will be used as an energy reserve for a 1 kWe domestic CCHP system using a Stirling engine to produce electric power. The thermal energy storage is conducted by means of the exploitation of the latent heat of fusion of the material contained inside the tank. This method was chosen because a great energy density is obtained and, at the same time, it is possible to extract the stored energy with very small variations on the temperature, which is a favorable feature for its intended purpose. The selection of the phase change material is discussed and the design of the different components of the proposed storage model is described. It is analyzed, as well, the insulating solution applied that minimizes heat losses. Finally, a comparison between experimental results of the tests performed on the first built to scale prototype and the data obtained from computer simulations is shown.

Bruno Cárdenas; Noel León

2014-01-01T23:59:59.000Z

291

Miniaturized Low-power Electro-optic Modulator Based on Silicon Integrated Nanophotonics and Organic Polymers  

E-Print Network (OSTI)

We design and demonstrate a compact, low-power, low-dispersion and broadband optical modulator based on electro-optic (EO) polymer refilled silicon slot photonic crystal waveguide (PCW). The EO polymer is engineered for large EO activity and near-infrared transparency. The half-wave switching-voltage is measured to be V{\\pi}=0.97V over optical spectrum range of 8nm, corresponding to a record-high effective in-device r33 of 1190pm/V and V{\\pi} L of 0.291Vmm in a push-pull configuration. Excluding the slow-light effect, we estimate the EO polymer is poled with an ultra-high efficiency of 89pm/V in the slot. In addition, to achieve high-speed modulation, silicon PCW is selectively doped to reduce RC time delay. The 3-dB RF bandwidth of the modulator is measured to be 11GHz, and a modulation response up to 40GHz is observed.

Zhang, Xingyu; Luo, Jingdong; Jen, Alex K -Y; Chen, Ray T

2014-01-01T23:59:59.000Z

292

Analysis of Complexity and Power Consumption in DSP-Based Optical Modulation Formats  

E-Print Network (OSTI)

of about 1 watt without considering thermoelectric cooler (TEC), which is used to normalize the power consumption of the various 400 GbE modulation format schemes considered here. The transceiver power consumption for each scheme takes into account all... , 39, 1402–1405, (2014). [13] J. J. Lee, et al., “Predication of TEC Power Consumption for Cooled Laser Diode Module,” in proceeding of LEOS, Paper WW3, (2004). Acknowledgments This work was supported by UK EPSRC via the INTERNET project. ...

Wei, J. L.; Cheng, Q.; Penty, R. V.; White, I. H.

2014-07-17T23:59:59.000Z

293

A simulator for training fossil-fuel power plants operators with an HMI based on a multi-window system  

Science Journals Connector (OSTI)

The hardware-software architecture for a power plant simulator is presented. The simulator is hosted in a local area network of personal computers and has Windows XP as its operating system. The Human-Machine Interfaces (HMIs) for the operator and the instructor are based on a multi-window system; therefore, they have access to a lot of information inside their respective action field at any moment during the simulation session. In particular, the operator HMI has been designed for being suitable for training power plants operators with modern HMIs, where the operation is based on computer screens. The simulator has been installed in an operators training centre where a group of acceptance tests has been successfully carried out. Currently, the simulator is being used as part of the training courses for fossil-fuel power plant operators.

Jose Tavira Mondragon; Luis Jimenez Fraustro; Guillermo Romero Jimenez

2010-01-01T23:59:59.000Z

294

The Commodification of Location: Dynamics of Power in Location-Based Systems  

E-Print Network (OSTI)

, technological object. Author Keywords Discipline, Power, Surveillance, GPS. ACM Classification Keywords H5.m. Information interfaces and presentation (e.g., HCI): Miscellaneous. General Terms: Human Factors. INTRODUCTION

Dourish,Paul

295

Incorporating DFIG-Based Wind Power Generator in Microgird Frequency Stabilization.  

E-Print Network (OSTI)

??Although wind power as a renewable energy is assumed to be an all-round advantageous source of energy, its intermittent nature can cause difficulties, especially in… (more)

Fakhari Moghadam Arani, Mohammadreza

2012-01-01T23:59:59.000Z

296

Enhanced control of DFIG-based wind power plants to comply with the international grid codes.  

E-Print Network (OSTI)

??A review of the latest international grid codes shows that large wind power plants are stipulated to not only ride-through various fault conditions, but also… (more)

Mohseni, Mansour

2011-01-01T23:59:59.000Z

297

RTDS-Based Design and Simulation of Distributed P-Q Power Resources in Smart Grid  

E-Print Network (OSTI)

Smart Grid on distribution system design," in Proc. of thestorage system design for distribution network," in Proc. ofdesign can noticeably improve the operational performance of the power distribution

Taylor, Zachariah David

2014-01-01T23:59:59.000Z

298

A Cycle-Based Formulation and Valid Inequalities for DC Power ...  

E-Print Network (OSTI)

Dec 19, 2014 ... Abstract: It is well-known that optimizing network topology by switching on and off transmission lines improves the efficiency of power delivery in ...

Burak Kocuk

2014-12-19T23:59:59.000Z

299

Development of a Dry Sorbent-based Post-Combustion CO2 Capture Technology for Retrofit in Existing Power Plants  

SciTech Connect

The objective of this research and development (R&D) project was to further the development of a solid sorbent-based CO2 capture process based on sodium carbonate (i.e. the Dry Carbonate Process) that is capable of capturing>90% of the CO2 as a nearly pure stream from coal-fired power plant flue gas with <35% increase in the cost of electrictiy (ICOE).

Nelson, Thomas; Coleman, Luke; Anderson, Matthew; Gupta, Raghubir; Herr, Joshua; Kalluri, Ranjeeth; Pavani, Maruthi

2009-12-31T23:59:59.000Z

300

PEV-based P-Q Control in Line Distribution Networks with High Requirement for Reactive Power Compensation  

E-Print Network (OSTI)

impact of distribution level wind turbines. Our design is based on a nonlinear power flow analysis of wind turbines to support their induction load to avoid generator voltage excursion. Note that, although-sized wind turbines in large wind farms [1], the smaller wind turbines that are used at the distribution

Huang, Jianwei

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

On-Chip Copper-Based vs. Optical Interconnects: Delay Uncertainty, Latency, Power, and Bandwidth Density Comparative Predictions  

E-Print Network (OSTI)

On-Chip Copper-Based vs. Optical Interconnects: Delay Uncertainty, Latency, Power, and Bandwidth. Albonesi, Philippe M. Fauchet, and Eby G. Friedman Department of Electrical and Computer Engineering of Rochester, Rochester, New York, 14627 Department of Electrical and Computer Engineering,Cornell University

Friedman, Eby G.

302

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 12, NO. 1, JANUARY 1997 87 Fuzzy Logic Based Intelligent Control of a Variable  

E-Print Network (OSTI)

system. The generation system has fuzzy logic control with vector control in the inner loops. A fuzzyIEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 12, NO. 1, JANUARY 1997 87 Fuzzy Logic Based a variable speed wind genera- tion system where fuzzy logic principles are used for efficiency optimization

Simões, Marcelo Godoy

303

PAPER ACCEPTED TO THE IEEE TRANSACTIONS ON POWER SYSTEMS 1 Sensitivity-based Security-constrained OPF Market  

E-Print Network (OSTI)

PAPER ACCEPTED TO THE IEEE TRANSACTIONS ON POWER SYSTEMS 1 Sensitivity-based Security-constrained OPF Market Clearing Model F. Milano, Member, IEEE, C. A. Ca~nizares, Senior Member, IEEE, and A. J constraints that properly include voltage stability limits in the operation of competitive electricity markets

Cañizares, Claudio A.

304

Low Power Body Sensor Network for Wireless ECG Based on Relaying of Creeping Waves at 2.4GHz1  

E-Print Network (OSTI)

Low Power Body Sensor Network for Wireless ECG Based on Relaying of Creeping Waves at 2.4GHz1 Engineering Rochester Institute of Technology Abstract- A wireless communication platform for ECG operating applications that demand higher data rates than ECG.1 I. INTRODUCTION The Electrocardiogram (ECG) [1

Tsouri, Gill

305

Nickel-base superalloys for ultra-supercritical coal-fired power plants: Fireside corrosion. Laboratory studies and power plant exposures  

Science Journals Connector (OSTI)

The aim of the study was to determine the fireside corrosion performance of certain nickel-base superalloys dedicated for construction of superheater and reheater sections of a boiler operating at advanced ultra-supercritical conditions. For this purpose, three nickel-base alloys varying in chromium content from 20% to 25% (Alloys 263, 617 and 740) were selected for laboratory tests up to 1000 h. Additionally, the chosen materials were exposed using a temperature-controlled corrosion probe in a 500 kWth pulverized fuel test rig, one lignite-fired and two hard-coal-fired power plants. The specimens’ temperatures were in the range 640–760 °C. The fireside corrosion was studied having in focus the synergy effect of combustion gas atmosphere, real fly ash deposits and alloy composition. Corrosion behavior of each alloy was determined using dimensional metrology and the obtained results were compared with data available from the literature. The values measured on the samples exposed in power plants fit well with the numbers generated from the laboratory tests performed at 24, 350 and 1000 h. Moreover the values are in good agreement with results found in the literature and similar alloy ranking based on corrosion resistance is confirmed by the literature. Clear sulphur-induced corrosion was noticed after 1000 h exposures in the laboratory furnaces at only one of the examined alloys, which is characterized by the highest molybdenum and lowest titanium content. Both of these elements are believed to play a significant role in the corrosion behavior of the examined alloys. In some metal rings exposed in power plants sulphur induced corrosion is witnessed. In contrast to iron-base austenitic steels no straight connection is observed between increasing chromium content and improved corrosion resistance in the nickel-base austenites. Intergranular oxidation with participation of alumina repeats and occasionally leads almost to a grain release. In laboratory conditions fly ash appears to partially inhibit the corrosive influence of the gas atmosphere, since it behaves to a certain extent as a protective barrier for the metal surface while acting as a “sulphur sink”.

Gosia Stein-Brzozowska; Diana M. Flórez; Jörg Maier; Günter Scheffknecht

2013-01-01T23:59:59.000Z

306

Carbon Dioxide Capture and Separation Techniques for Gasification-based Power Generation Point Sources  

SciTech Connect

The capture/separation step for carbon dioxide (CO2) from large-point sources is a critical one with respect to the technical feasibility and cost of the overall carbon sequestration scenario. For large-point sources, such as those found in power generation, the carbon dioxide capture techniques being investigated by the in-house research area of the National Energy Technology Laboratory possess the potential for improved efficiency and reduced costs as compared to more conventional technologies. The investigated techniques can have wide applications, but the research has focused on capture/separation of carbon dioxide from flue gas (post-combustion from fossil fuel-fired combustors) and from fuel gas (precombustion, such as integrated gasification combined cycle or IGCC). With respect to fuel gas applications, novel concepts are being developed in wet scrubbing with physical absorption; chemical absorption with solid sorbents; and separation by membranes. In one concept, a wet scrubbing technique is being investigated that uses a physical solvent process to remove CO2 from fuel gas of an IGCC system at elevated temperature and pressure. The need to define an ideal solvent has led to the study of the solubility and mass transfer properties of various solvents. Pertaining to another separation technology, fabrication techniques and mechanistic studies for membranes separating CO2 from the fuel gas produced by coal gasification are also being performed. Membranes that consist of CO2-philic ionic liquids encapsulated into a polymeric substrate have been investigated for permeability and selectivity. Finally, dry, regenerable processes based on sorbents are additional techniques for CO2 capture from fuel gas. An overview of these novel techniques is presented along with a research progress status of technologies related to membranes and physical solvents.

Pennline, H.W.; Luebke, D.R.; Jones, K.L.; Morsi, B.I. (Univ. of Pittsburgh, PA); Heintz, Y.J. (Univ. of Pittsburgh, PA); Ilconich, J.B. (Parsons)

2007-06-01T23:59:59.000Z

307

BBO-based small autonomous hybrid power system optimization incorporating wind speed and solar radiation forecasting  

Science Journals Connector (OSTI)

Abstract Rising carbon emission or carbon footprint imposes grave concern over the earth?s climatic condition, as it results in increasing average global temperature. Renewable energy sources seem to be the favorable solution in this regard. It can reduce the overall energy consumption rate globally. However, the renewable sources are intermittent in nature with very high initial installation price. Off-grid Small Autonomous Hybrid Power Systems (SAHPS) are good alternative for generating electricity locally in remote areas, where the transmission and distribution of electrical energy generated from conventional sources are otherwise complex, difficult and costly. In optimizing SAHPS, weather data over past several years are generally the main input, which include wind speed and solar radiation. The weather resources used in this optimization process have unsystematic variations based on the atmospheric and seasonal phenomenon and it also varies from year to year. While using past data in the analysis of SAHPS performance, it was assumed that the same pattern will be followed in the next year, which in reality is very unlikely to happen. In this paper, we use BBO optimization algorithm for SAHPS optimal component sizing by minimizing the cost of energy. We have also analysed the effect of using forecast weather data instead of past data on the SAHPS performance. ANNs, which are trained with back-propagation training algorithm, are used for wind speed and solar radiation forecasting. A case study was used for demonstrating the performance of BBO optimization algorithm along with forecasting effects. The simulation results clearly showed the advantages of utilizing wind speed and solar radiation forecasting in a SAHPS optimization problem.

R.A. Gupta; Rajesh Kumar; Ajay Kumar Bansal

2015-01-01T23:59:59.000Z

308

The development of low cost LiFePO4-based high power lithium-ion batteries  

SciTech Connect

The cycling performance of low-cost LiFePO4-based high-power lithium-ion cells was investigated and the components were analyzed after cycling to determine capacity fade mechanisms. Pouch type LiFePO4/natural graphite cells were assembled and evaluated by constant C/2 cycling, pulse-power and impedance measurements. From post-test electrochemical analysis after cycling, active materials, LiFePO4 and natural graphite, showed no degradation structurally or electrochemically. The main reasons for the capacity fade of cell were lithium inventory loss by side reaction and possible lithium deposition on the anode.

Shim, Joongpyo; Sierra, Azucena; Striebel, Kathryn A.

2003-11-25T23:59:59.000Z

309

IEEE Power Engineering Society Conference Proceedings, SF, CA, June 12-16, 2005, to appear. An Agent-Based Computational Laboratory  

E-Print Network (OSTI)

@iastate.edu Abstract-- In April 2003 the U.S. Federal Energy Regulatory Commission proposed the Wholesale Power Market. An Agent-Based Computational Laboratory for Testing the Economic Reliability of Wholesale Power Market Platform (WPMP) for adoption by all U.S. wholesale power markets. The WPMP market design envisions day

Tesfatsion, Leigh

310

A co-simulation method as an enabler for joint analysis and design of MAS-based electrical power protection and communication  

Science Journals Connector (OSTI)

Multi-agent system (MAS) protection is under investigation as a potential method for distributed control in modern electrical power systems. The coordination of the MAS is based on local measurements available to each agent's site as well as on the information ... Keywords: Multi-agent system, integrated simulation, power system communication, power system protection

Weilin Li; Min Luo; Lin Zhu; Antonello Monti; Ferdinanda Ponci

2013-07-01T23:59:59.000Z

311

Power Grid Fundamental Signal Detection Based on an Adaptive Notch Filter  

Science Journals Connector (OSTI)

In order to detect the power grid fundamental signal in the polluted environment, a...?...and ?. Empirical results show that the algorithm is simple and can offer a high degree of immunity and insensitivity to vo...

Zhi-xia Zhang; Xin-yu Zhang; Chang-liang Liu…

2014-01-01T23:59:59.000Z

312

Project Profile: Regenerative Carbonate-Based Thermochemical Energy Storage System for Concentrating Solar Power  

Energy.gov (U.S. Department of Energy (DOE))

The Department of Energy’s SunShot Initiative awarded Southern Research Institute (SRI) through the Concentrating Solar Power: Efficiently Leveraging Equilibrium Mechanisms for Engineering New Thermochemical Storage (CSP: ELEMENTS) funding program.

313

Control of a Powered Ankle–Foot Prosthesis Based on a Neuromuscular Model  

E-Print Network (OSTI)

Control schemes for powered ankle-foot prostheses rely upon fixed torque-ankle state relationships obtained from measurements of intact humans walking at target speeds and across known terrains. Although effective at their ...

Geyer, Hartmut

314

A neuromuscular-model based control strategy for powered ankle-foot prostheses  

E-Print Network (OSTI)

In the development of a powered ankle-foot prosthesis, it is desirable to provide the prosthesis with the ability to exhibit human-like dynamics. A simple method for achieving this goal involves trajectory tracking, where ...

Eilenberg, Michael Frederick

2009-01-01T23:59:59.000Z

315

Optimum Generation Scheduling Based Dynamic Price Making for Demand Response in a Smart Power Grid  

Science Journals Connector (OSTI)

Smart grid is a recently growing area of research including optimum and reliable operation of bulk power grid from production to end-user premises. Demand side activities like demand response (DR) for enabling co...

Nikolaos G. Paterakis; Ozan Erdinc…

2014-01-01T23:59:59.000Z

316

A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants  

E-Print Network (OSTI)

power fluctuations: the pv plant as a low pass filter,"point sensor to the entire PV plant at each timescale isWVM Inputs WVM Outputs PV Plant Footprint Density of PV

Lave, Matthew; Kleissl, Jan; Stein, Joshua S

2013-01-01T23:59:59.000Z

317

Optimization of support vector machine power load forecasting model based on data mining and Lyapunov exponents  

Science Journals Connector (OSTI)

According to the chaotic and non-linear characters of power load data, the time series matrix is established with ... dimension. Due to different features of the data, data mining algorithm is conducted to classi...

Dong-xiao Niu ???; Yong-li Wang ???…

2010-04-01T23:59:59.000Z

318

Review of Existing Hydrogen-based Autonomous Power Systems — Current Situation  

Science Journals Connector (OSTI)

There are but a few stand-alone power systems utilising hydrogen energy technologies that have been operated around the globe, mostly in the context of research or demonstration projects. In the 1980s and 1990...

N. Lymberopoulos

2008-01-01T23:59:59.000Z

319

Microstructural characterization of Co-based coating deposited by low power pulse laser cladding  

Science Journals Connector (OSTI)

A detailed microstructural study of Stellite 6 coating deposited on a low carbon ferritic steel substrate using preplaced powder method and low power Nd:YAG pulse laser is performed. The grain structure and solid...

A. Farnia; F. Malek Ghaini; V. Ocelík; J. Th. M. De Hosson

2013-03-01T23:59:59.000Z

320

RTDS-Based Design and Simulation of Distributed P-Q Power Resources in Smart Grid  

E-Print Network (OSTI)

on Power Engineering, Energy and Electrical Drives, Lisbon,and Delivery of Electrical Energy in the 21st Century,The portion of electrical energy in the overall energy

Taylor, Zachariah David

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Development of a Geographic Information System based modeling of a shipboard power system  

E-Print Network (OSTI)

Since the early power systems in naval ships, there has been considerable advancement in technology. Today's naval ships carry an array of complex electrical and electronic equipment. A typical naval ship has electronics systems to cater...

Rajbhandari, Ujjwal Prasad

2012-06-07T23:59:59.000Z

322

A Resilient Real-Time Agent-Based System for a Reconfigurable Power Grid  

E-Print Network (OSTI)

outages and other power quality and reliability events to be 1% of GDP, or $100 billion per year [4 infrastructure that includes renewable or sustainable energy sources [1][2]. The existing energy management

Tolbert, Leon M.

323

On improving performance and conserving power in cluster-based web servers  

E-Print Network (OSTI)

. Existing research separately addresses server performance and power conservation. The locality-aware request distribution (LARD) scheme improves the system response time by having the requests served by web servers which have the data in their cache...

Vageesan, Gopinath

2007-04-25T23:59:59.000Z

324

Domestic equipment for the development of gas-turbine based power engineering  

Science Journals Connector (OSTI)

A brief analysis of characteristics and specific features of foreign gas-turbine installations is presented. Prospects of introduction of combined-cycle and gas-turbine technologies in power engineering of Rus...

G. G. Ol’khovskii

2008-06-01T23:59:59.000Z

325

Conceptual design of the bimodal nuclear power system based on the ‘‘Romashka’’ type reactor with thermionic energy conversion system  

Science Journals Connector (OSTI)

The paper presents conceptual design of the bimodal space nuclear power system (NPS) based on the high?temperature reactor of ROMASHKA type with thermoninic energy conversion system. At the heart of the design is an employment of close?spaced thermionic diodes operating in a quasi?vacuum mode. The paper gives preliminary estimates of the NPS neutron?physical electric thermophysical and mass?dimensional parameters for the reactor electric power of 25 kW and propulsive thrust of about 80 N. Discussed are peculiarities of the combined mode wherein electric power is generated along with propulsive thrust. The paper contains results of the design studies performed by the Small Business ‘‘NP Energotech’’ under the Agreement with Rockwell International/Rocketdyne Division and according to the Rocketdyne Division provided Design Requirements. Involved in the work was the team of specialists of RRC ‘‘Kurchatov Institute’’ ‘‘Red Star’’ State Enterprise and Research Institute of SPA ‘‘Luch’’

Nikolai N. Ponmarev?Stepnoi; Veniamin A. Usov; Yuri V. Nikolaev; Stanislav A. Yeriemin; Yevgeny Ye. Zhabotinski; Anatoly Ya. Galkin; Yevgeny D. Avdoshyn

1995-01-01T23:59:59.000Z

326

An intelligent neuro-fuzzy logic controller for induction generator based wind generation to improve power system stability  

Science Journals Connector (OSTI)

Power systems are non-linear and they are often subjected to random disturbances. This paper deals with the application of the intelligent neuro-fuzzy technique to the design of the robust power system stabiliser for power system oscillation damping enhancement in a wind turbine based power system network. The stabilising signal is computed in real time using suitable fuzzy membership functions depending upon the state of the generator on the speed-acceleration phase plane. These input signals are first characterised by a set of linguistic variables using fuzzy set notations. The fuzzy relation matrix, which gives the relationship between stabiliser inputs and stabiliser output, allows a set of fuzzy logic operations that are performed on stabiliser inputs to obtain the desired stabiliser output. The performance of the proposed controller is analysed in a single induction machine-infinite bus power system data subjected to various dynamic and transient disturbances. The proposed intelligent neuro-fuzzy control scheme exhibits a superior damping performance in comparison to the conventional controllers. Its simple architecture reduces the computational burden, thereby making it attractive for real-time implementation.

N. Albert Singh; K.A. Muraleedharan; K. Gomathy

2009-01-01T23:59:59.000Z

327

Comprehensive evaluation of coal-fired power plants based on grey relational analysis and analytic hierarchy process  

Science Journals Connector (OSTI)

In China, coal-fired power plants are the main supplier of electricity, as well as the largest consumer of coal and water resources and the biggest emitter of SOx, NOx, and greenhouse gases (GHGs). Therefore, it is important to establish a scientific, reasonable, and feasible comprehensive evaluation system for coal-fired power plants to guide them in achieving multi-optimisation of their thermal, environmental, and economic performance. This paper proposes a novel comprehensive evaluation method, which is based on a combination of the grey relational analysis (GRA) and the analytic hierarchy process (AHP), to assess the multi-objective performance of power plants. Unlike the traditional evaluation method that uses coal consumption as a basic indicator, the proposed evaluation method also takes water consumption and pollutant emissions as indicators. On the basis of the proposed evaluation method, a case study on typical 600 MW coal-fired power plants is carried out to determine the relevancy rules among factors including the coal consumption, water consumption, pollutant, and GHG emissions of power plants. This research offers new ideas and methods for the comprehensive performance evaluation of complex energy utilisation systems, and is beneficial to the synthesised consideration of resources, economy, and environment factors in system optimising and policy making.

Gang Xu; Yong-ping Yang; Shi-yuan Lu; Le Li; Xiaona Song

2011-01-01T23:59:59.000Z

328

Techno-economic analysis of CO2 conditioning processes in a coal based oxy-combustion power plant  

Science Journals Connector (OSTI)

Oxy-combustion is a competitive technology to enable the capture of CO2 from coal based power plants. The CO2 conditioning process is an important contributor to the power penalty related to CO2 capture in such power plants. The two-stage flash process is commonly proposed in literature. This paper presents a study on the CO2 conditioning process in three cases: one-stage flash, two-stage flash and three-stage flash. The composite curves are applied to investigate the improvement potential. A detailed exergy analysis has been performed to compare the plant performance in the three cases. Considering the one-stage flash process as the base case, the specific power consumption is reduced by 7.3% in the two-stage flash process and 8.1% in the three-stage flash process. The investment cost will of course increase. The economic analysis shows that the two-stage flash process is the most cost effective alternative. However, a higher recovery rate can be achieved in the three-stage flash process when the CO2 purity is designed to be the same for the three cases.

Chao Fu; Truls Gundersen

2012-01-01T23:59:59.000Z

329

Mobile Persuasive Technologies for Rural Health  

E-Print Network (OSTI)

grid power and other forms of electricity (solar and micro-grid in the previous month; in addition, our partner NGO has implemented micro

Ramachandran, Divya Lalitha

2010-01-01T23:59:59.000Z

330

Elevated Temperature Materials for Power Generation and Propulsion The energy industry is designing higher-efficiency land-based turbines for natural gas-fired  

E-Print Network (OSTI)

higher-efficiency land-based turbines for natural gas-fired power generation systems. The high inletElevated Temperature Materials for Power Generation and Propulsion The energy industry is designing of thermomechanical fatigue life of the next generation's Ni-base superalloys are being developed to enhance life

Li, Mo

331

An Integrated Power Pack of Dye-Sensitized Solar Cell and Li Battery Based on Double-Sided TiO2 Nanotube Arrays  

E-Print Network (OSTI)

is based on a silicon solar panel and a solid-state lithium battery as the two independent parts, whichAn Integrated Power Pack of Dye-Sensitized Solar Cell and Li Battery Based on Double-Sided TiO2 harvest and storage processes. This power pack incorporates a series-wound dye- sensitized solar cell

Wang, Zhong L.

332

A SiC MOSFET Based Inverter for Wireless Power Transfer Applications  

SciTech Connect

In a wireless power transfer (WPT) system, efficiency of the power conversion stages is crucial so that the WPT technology can compete with the conventional conductive charging systems. Since there are 5 or 6 power conversion stages, each stage needs to be as efficient as possible. SiC inverters are crucial in this case; they can handle high frequency operation and they can operate at relatively higher temperatures resulting in reduces cost and size for the cooling components. This study presents the detailed power module design, development, and fabrication of a SiC inverter. The proposed inverter has been tested at three center frequencies that are considered for the WPT standardization. Performance of the inverter at the same target power transfer level is analyzed along with the other system components. In addition, another SiC inverter has been built in authors laboratory by using the ORNL designed and developed SiC modules. It is shown that the inverter with ORNL packaged SiC modules performs simular to that of the inverter having commercially available SiC modules.

Onar, Omer C [ORNL] [ORNL; Chinthavali, Madhu Sudhan [ORNL] [ORNL; Campbell, Steven L [ORNL] [ORNL; Ning, Puqi [Chinese Academy of Sciences (CAS)] [Chinese Academy of Sciences (CAS); White, Cliff P [ORNL] [ORNL; Miller (JNJ), John M. [JNJ-Miller PLC] [JNJ-Miller PLC

2014-01-01T23:59:59.000Z

333

Development of a Dry Sorbent-Based Post Combustion CO2 Capture Technology for Retrofit in Existing Power Plants  

NLE Websites -- All DOE Office Websites (Extended Search)

Dry Sorbent-Based Dry Sorbent-Based Post Combustion CO 2 Capture Technology for Retrofit in Existing Power Plants Background Currently available commercial processes to remove carbon dioxide (CO 2 ) from flue gas streams are costly and energy intensive. RTI International is heading a research team to continue development and scale-up of an innovative process for CO 2 capture that has significant potential to be less expensive and less energy intensive than conventional technologies. The "Dry Carbonate Process" utilizes a dry,

334

Transient stability and control of renewable generators based on Hamiltonian surface shaping and power flow control. Part II, analysis.  

SciTech Connect

The swing equations for renewable generators connected to the grid are developed and a wind turbine is used as an example. The swing equations for the renewable generators are formulated as a natural Hamiltonian system with externally applied non-conservative forces. A two-step process referred to as Hamiltonian Surface Shaping and Power Flow Control (HSSPFC) is used to analyze and design feedback controllers for the renewable generators system. This formulation extends previous results on the analytical verification of the Potential Energy Boundary Surface (PEBS) method to nonlinear control analysis and design and justifies the decomposition of the system into conservative and non-conservative systems to enable a two-step, serial analysis and design procedure. The first step is to analyze the system as a conservative natural Hamiltonian system with no externally applied non-conservative forces. The Hamiltonian surface of the swing equations is related to the Equal-Area Criterion and the PEBS method to formulate the nonlinear transient stability problem. This formulation demonstrates the effectiveness of proportional feedback control to expand the stability region. The second step is to analyze the system as natural Hamiltonian system with externally applied non-conservative forces. The time derivative of the Hamiltonian produces the work/rate (power flow) equation which is used to ensure balanced power flows from the renewable generators to the loads. The Second Law of Thermodynamics is applied to the power flow equations to determine the stability boundaries (limit cycles) of the renewable generators system and enable design of feedback controllers that meet stability requirements while maximizing the power generation and flow to the load. Necessary and sufficient conditions for stability of renewable generators systems are determined based on the concepts of Hamiltonian systems, power flow, exergy (the maximum work that can be extracted from an energy flow) rate, and entropy rate. This paper will present the analysis and numerical simulation results for two nonlinear control design examples that include: (1) the One-Machine Infinite Bus (OMIB) system with a Unified Power Flow Controller (UPFC) and (2) the swing equation for a wind turbine connected to an infinite bus through a UPFC to determine the required performance of the UPFC to enable the maximum power output of a wind turbine subject to stochastic inputs while meeting the power system constraints on frequency and phase. The energy storage requirements will also be identified from the UPFC and/or FACTS devices while working in combination with the wind turbine.

Robinett, Rush D., III; Wilson, David Gerald

2010-11-01T23:59:59.000Z

335

Unbiased MMSE-Based Noise Power Estimation with Low Complexity and Low Tracking Delay  

E-Print Network (OSTI)

of the speech power and the estimation of the clean speech. We show that the proposed SPP approach maintains Agreement PIAP-GA-2008-214699 AUDIS and the Dutch Technology Foundation STW. T. Gerkmann heads the Speech Signal Processing Group, Universit¨at Olden- burg, 26111 Oldenburg, Germany, email: timo

336

Algorithm-Based Low-Power and High-Performance Multimedia Signal Processing  

E-Print Network (OSTI)

-power and high-performance signal-processing systems. The proposed multirate design methodology is systematic and to show that the multirate approach is an effective and systematic design methodology to achieve low design, motion estimation, multirate processing, parallel architectures, Reed­Solomon codes, video coding

Hung, Shih-Hao

337

Journal of Power Sources 161 (2006) 12881296 Crosslinkable fumed silica-based nanocomposite  

E-Print Network (OSTI)

in battery technology have not kept pace with the power requirements of these electrical devices. Solid electrolytes for rechargeable lithium batteries Yangxing Li, Jeffrey A. Yerian, Saad A. Khan, Peter S. Fedkiw Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695

Khan, Saad A.

338

Pumped storage for hydroelectric power. (Latest citations from Fluidex data base). Published Search  

SciTech Connect

The bibliography contains citations concerning the design, development, construction, and characteristics of surface and underground pumped storage for hydroelectric power. Pumped storage projects and facilities worldwide are referenced. There is some consideration of research and experimental results of pumped storage studies, as well as modeling. (Contains a minimum of 192 citations and includes a subject term index and title list.)

Not Available

1992-09-01T23:59:59.000Z

339

Primary and secondary electrical space power based on advanced PEM systems  

SciTech Connect

For new space ventures, power continues to be a pacing function for mission planning and experiment endurance. Although electrochemical power is a well demonstrated space power technology, current hardware limitations impact future mission viability. In order to document and augment electrochemical technology, a series of experiments for the National Aeronautics and Space Administration Lewis Research Center (NASA LeRC) are underway at the Los Alamos National Laboratory that define operational parameters on contemporary proton exchange membrane (PEM) hardware operating with hydrogen and oxygen reactants. Because of the high efficiency possible for water electrolysis, this hardware is also thought part of a secondary battery design built around stored reactants -- the so-called regenerative fuel cell. An overview of stack testing at Los Alamos, and of analyses related to regenerative fuel cell systems are provided in this paper. Finally, this paper describes work looking at innovative concepts that remove complexity from stack hardware with the specific intent of higher system reliability. This new concept offers the potential for unprecedented electrochemical power system energy densities.

Vanderborgh, N.E.; Hedstrom, J.C.; Stroh, K.R. [Los Alamos National Lab., NM (United States); Huff, J.R. [Ballard Power Corp., Albuquerque, NM (United States)

1993-05-01T23:59:59.000Z

340

Primary and secondary electrical space power based on advanced PEM systems  

SciTech Connect

For new space ventures, power continues to be a pacing function for mission planning and experiment endurance. Although electrochemical power is a well demonstrated space power technology, current hardware limitations impact future mission viability. In order to document and augment electrochemical technology, a series of experiments for the National Aeronautics and Space Administration Lewis Research Center (NASA LeRC) are underway at the Los Alamos National Laboratory that define operational parameters on contemporary proton exchange membrane (PEM) hardware operating with hydrogen and oxygen reactants. Because of the high efficiency possible for water electrolysis, this hardware is also thought part of a secondary battery design built around stored reactants -- the so-called regenerative fuel cell. An overview of stack testing at Los Alamos, and of analyses related to regenerative fuel cell systems are provided in this paper. Finally, this paper describes work looking at innovative concepts that remove complexity from stack hardware with the specific intent of higher system reliability. This new concept offers the potential for unprecedented electrochemical power system energy densities.

Vanderborgh, N.E.; Hedstrom, J.C.; Stroh, K.R. (Los Alamos National Lab., NM (United States)); Huff, J.R. (Ballard Power Corp., Albuquerque, NM (United States))

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

A Fuzzy Logic Based Power Electronic System for Wind Energy Conversion Scheme  

Science Journals Connector (OSTI)

This paper used fuzzy logic theory to study the behavior of a simple pulse width modulated three phase voltage controlled VSI, which feeds a weak ac network with power produced from an offshore wind farm (WF) of induction generators. Its control system, ...

Lata Gidwani; Rajesh Kumar

2007-12-01T23:59:59.000Z

342

Low Power BIST Based on Scan Partitioning Jinkyu Lee and Nur A. Touba  

E-Print Network (OSTI)

, touba}@ece.utexas.edu Abstract A built-in self-test (BIST) scheme is presented which both reduces while also significantly reducing the power dissipation. Weighted pattern testing has been well studied reduce hardware overhead for weighted random test and increase fault coverage compared

Touba, Nur A.

343

NONLINEAR-CARRIER CONTROL FOR HIGH-POWER-FACTOR RECTIFIERS BASED ON  

E-Print Network (OSTI)

, flyback, Cuk and Sepic converters offer the benefits of single-stage transformer isolation, voltage step-up-power- factor rectification. A simple exponential carrier waveform generator is described. Using the NLC con generator is discussed in Section 4. Design-oriented har- monic distortion analysis and modeling aspects

344

A Zonotope-Based Method for Capturing the Effect of Variable Generation on the Power Flow  

E-Print Network (OSTI)

such as wind and solar into existing systems. Using this method, we can determine whether the system state- machine transmission system. I. INTRODUCTION The integration of renewable resources such as wind and solar of a power system; this uncertainty arises from the increasing penetration of renewable resources

Liberzon, Daniel

345

A Constraint-based Application Model and Scheduling Techniques for Power-aware Systems  

E-Print Network (OSTI)

pack and a solar This research was sponsored by DARPA under contract F33615- 00-1-1719 Permission-89791-88-6/97/05...$5.00. panel to operate under extremely harsh weather and power condi- tions for hundreds of days. Such systems

Chou, Pai H.

346

Maximum wind energy contribution in autonomous electrical grids based on thermal power stations  

Science Journals Connector (OSTI)

Greek islands cover their continuously increasing electricity demand on the basis of small autonomous thermal power stations. This electrification solution is related with increased operational cost and power insufficiency, especially during summer. On the other hand, the stochastic behaviour of the wind and the important fluctuations of daily and seasonal electricity load in almost all Greek islands pose a substantial penetration limit for the exploitation of the high wind potential of the area. In this context, the present study is concentrated on developing an integrated methodology which can estimate the maximum wind energy contribution to the existing autonomous electrical grids, using the appropriate stochastic analysis. For this purpose one takes into account the electrical demand probability density profile of every island under investigation as well as the operational characteristics of the corresponding thermal power stations. Special attention is paid in order to protect the existing internal combustion engines from unsafe operation below their technical minima as well as to preserve the local system active power reserve and the corresponding dynamic stability. In order to increase the reliability of the results obtained, one may use extensive information for several years. Finally, the proposed study is integrated with an appropriate parametrical analysis, investigating the impact of the main parameters variation on the expected maximum wind energy contribution.

J.K. Kaldellis

2007-01-01T23:59:59.000Z

347

Reliable GPS-Based Timing for Power Systems: A Multi-Layered Multi-Receiver Architecture  

E-Print Network (OSTI)

a victim receiver's reported position, time, or both. In a future scenario where PMU data play signal and data process- ing; most of the countermeasures exploit the static and networked nature of time measurement unit (PMU), also known as synchrophasor, is a device capable of measuring power system voltage

Gao, Grace Xingxin

348

PEV-based Reactive Power Compensation for Wind DG Units: A Stackelberg Game Approach  

E-Print Network (OSTI)

--There has been a growing interest recently towards integrating more renewable energy resources management solutions for renewable wind and solar energy integration. In addition to the need for constantly challenges to integrate these DG units. Above all, there exists no accurate long term wind power prediction

Huang, Jianwei

349

Eigenvalue Analysis of a DFIG Based Wind Power System under Different Modes of Operations  

Science Journals Connector (OSTI)

This chapter discussed the various mode of operation of the Doubly Fed Induction Generator (DFIG) based wind farm system. The impact ... on the different modes of operation for the DFIG based wind generation syst...

Y. Mishra; S. Mishra; Fangxing Li; Z. Y. Dong

2010-01-01T23:59:59.000Z

350

Combined heat and power systems for commercial buildings: investigating cost, emissions, and primary energy reduction based on system components.  

E-Print Network (OSTI)

?? Combined heat and power (CHP) systems produce electricity and useful heat from fuel. When power is produced near a building which consumes power, transmission… (more)

Smith, Amanda D.

2012-01-01T23:59:59.000Z

351

Physics-based simulation of the impact of demand response on lead-acid emergency power availability in a datacenter  

Science Journals Connector (OSTI)

Abstract This paper uses a one-dimensional, physics-based model of a valve-regulated lead-acid (VRLA) battery to examine the impact of demand response on uninterruptible power supply (UPS) availability in a datacenter. Datacenters are facilities that provide services such as cloud computing, web search, etc. They are also large electricity consumers. An energy-efficient 15 MW datacenter, for instance, may pay $1 m per month for electricity. Datacenters often utilize VRLA batteries to ensure high reliability in serving their computational demand. This motivates the paper's central question: to what extent does the use of datacenter UPS batteries for demand response affect their availability for their primary purpose (namely, emergency power)? We address this question using a physics-based model of the coupled diffusion-reaction dynamics of VRLA batteries. We discretize this model using finite differences, and simulate it for different datacenter battery pack sizes. The results show that for a typical datacenter power demand profile, a VRLA battery pack sized for UPS functionality can provide demand response with only a minimal loss of UPS availability.

A. Mamun; D. Wang; I. Narayanan; A. Sivasubramaniam; H.K. Fathy

2015-01-01T23:59:59.000Z

352

Multi-objective dynamic economic emission dispatch of electric power generation integrated with game theory based demand response programs  

Science Journals Connector (OSTI)

Abstract The dynamic economic emission dispatch (DEED) of electric power generation is a multi-objective mathematical optimization problem with two objective functions. The first objective is to minimize all the fuel costs of the generators in the power system, whilst the second objective seeks to minimize the emissions cost. Both objective functions are subject to constraints such as load demand constraint, ramp rate constraint, amongst other constraints. In this work, we integrate a game theory based demand response program into the DEED problem. The game theory based demand response program determines the optimal hourly incentive to be offered to customers who sign up for load curtailment. The game theory model has in built mechanisms to ensure that the incentive offered the customers is greater than the cost of interruption while simultaneously being beneficial to the utility. The combined DEED and game theoretic demand response model presented in this work, minimizes fuel and emissions costs and simultaneously determines the optimal incentive and load curtailment customers have to perform for maximal power system relief. The developed model is tested on two test systems with industrial customers and obtained results indicate the practical benefits of the proposed model.

Nnamdi I. Nwulu; Xiaohua Xia

2015-01-01T23:59:59.000Z

353

www.jatit.org ARTIFICIAL INTELLIGENCE BASED TUNING OF SVC CONTROLLER FOR CO-GENERATED POWER SYSTEM  

E-Print Network (OSTI)

The gain of SVC depends upon the type of reactive power load for optimum performance. As the load and input wind power conditions are variable, the gain setting of SVC needs to be adjusted or tuned. In this paper, an ANN based approach has been used to tune the gain parameters of the SVC controller over a wide range of load characteristics. The multi-layer feed-forward ANN tool with the error backpropagation training method is employed. Loads have been taken as the function of voltage. Analytical techniques have mostly been based on impedance load reduced network models, which suffer from several disadvantages, including inadequate load representation and lack of structural integrity. The ability of ANNs to spontaneously learn from examples, reason over inexact and fuzzy data and provide adequate and quick responses to new information not previously stored in memory has generated high performance dynamical system with unprecedented robustness. ANNs models have been developed for different hybrid power system configurations for tuning the proportional-integral controller for SVC. Transient responses of different autonomous configurations show that SVC controller with its gained tuned by the ANNs provide optimum system performance for a variety of loads.

Vinod Kumar

354

High-power LEDs based on InGaAsP/InP heterostructures  

SciTech Connect

High-power light-emitting diodes (LEDs) with mesa diameters of 100, 200, and 300 ?m are developed on the basis of InGaAsP/InP heterostructures. The mesas are close in shape to a truncated cone with a generatrix inclination angle of ?45° in the vicinity of the active region of the LED, with a ring etched around the mesa serving as a reflector. The emission spectra and directivity patterns of these LEDs are studied in a wide range of current densities and it is shown that radiative recombination is dominant to a current density of ?5000 A/cm{sup 2}, which makes these structures promising for the development of high-power LEDs. An emission power of ?14 mW is obtained in the continuous-wave mode (I = 0.2 A, ? = 1.1 ?m), and that of 77 mW, in the pulsed mode (I = 2 A, ? = 1.1 ?m), which corresponds to external quantum efficiencies of 6.2 and 3.4%, respectively.

Rakovics, V. [Hungarian Academy of Sciences, Institute of Technical Physics and Materials Science, Research Centre for Natural Sciences (Hungary); Imenkov, A. N.; Sherstnev, V. V.; Serebrennikova, O. Yu.; Il’inskaya, N. D.; Yakovlev, Yu. P., E-mail: Yak@iropt1.ioffe.ru [Russian Academy of Sciences, Ioffe Physical-Technical Institute (Russian Federation)

2014-12-15T23:59:59.000Z

355

An adaptive power system stabiliser based on fuzzy and swarm intelligence  

Science Journals Connector (OSTI)

Well-damped transient response of power systems signifies a vital control task. The paper presents a design methodology of an adaptive power system stabiliser (PSS) to achieve such task by targeting certain damping ratio and settling time. A standard simple-structure controller is used with the plant, which includes the synchronous generator and exciter, and the overall transfer function is derived in terms of the PSS parameters. A multi-objective optimisation function is formulated in order to force the damping ratio and settling time of the system to desired values. Particle swarm optimisation (PSO) is applied to independently obtain the PSS parameters which minimise such objective function at selected load points covering a wide range of operation. The data obtained from PSO represent the training data of an adaptive neuro-fuzzy inference system (ANFIS), which could give the PSS parameters at any load within a wide region of operating conditions. Testing of the proposed PSS shows that the desired performance indices could be fulfilled from light load to over load under both lagging and leading power factor conditions.

M.A. Awadallah; H.M. Soliman

2008-01-01T23:59:59.000Z

356

Evaluation of Finite Element Method Based Software for Simulation of Hydropower Generator - Power Grid Interaction.  

E-Print Network (OSTI)

?? The accuracy, ease of use, and execution time of the finite element method based software Maxwell coupled to the system simulation software Simplorer was… (more)

Persarvet, Gustav

2011-01-01T23:59:59.000Z

357

Analysis of the Lattice-Boltzmann-Based Code PowerFLOW: Flow Through a Parallel Confined Jet  

SciTech Connect

Recent advances in the development and practical implementation of the Lattice-Boltzmann (LB) method as applied to computational fluid dynamics (CFD) have spurred much interest. A simple literature search of this area yielded well over 200 articles published in the open literature since 1997. The key advantage of the LB method is the time-accurate simulation of complex flow phenomena that are intractable with traditional methods. Analysis of flow in a parallel confined jet (PCJ) has been performed using the commercial LB-based CFD code PowerFLOW (Exa Corporation, Lexington, MA, USA). Results are compared to both experimental data and numerical results given in the literature, and it was observed that PowerFLOW does very well in accurately emulating the PJC experimental data as compared to Reynolds-Averaged Navier-Stokes schemes. In addition, the inherently transient nature of the LB method allowed the analysis of time-dependent aspects of jet flows (e.g., flapping).

S.J. Vinay III; J.R. Buchanan, Jr.

2002-08-23T23:59:59.000Z

358

Inter-ELM Power Decay Length for JET and ASDEX Upgrade: Measurement and Comparison with Heuristic Drift-Based Model  

Science Journals Connector (OSTI)

Experimental measurements of the SOL power decay length (?q) estimated from analysis of fully attached divertor heat load profiles from two tokamaks, JET and ASDEX Upgrade, are presented. Data was measured by means of infrared thermography. An empirical scaling reveals parametric dependency ?q in mm=0.73BT-0.78qcyl1.2PSOL0.1Rgeo0, where BT(T) describes the toroidal magnetic field, qcyl the cylindrical safety factor, PSOL(MW) the power crossing the separatrix and Rgeo(m) the major radius of the device. A comparison of these measurements to a heuristic particle drift-based model shows satisfactory agreement in both absolute magnitude and scaling. Extrapolation to ITER gives ?q?1??mm.

T. Eich; B. Sieglin; A. Scarabosio; W. Fundamenski; R. J. Goldston; A. Herrmann (ASDEX Upgrade Team)

2011-11-14T23:59:59.000Z

359

High power impulse magnetron sputtering and related discharges: scalable plasma sources for plasma-based ion implantation and deposition  

SciTech Connect

High power impulse magnetron sputtering (HIPIMS) and related self-sputtering techniques are reviewed from a viewpoint of plasma-based ion implantation and deposition (PBII&D). HIPIMS combines the classical, scalable sputtering technology with pulsed power, which is an elegant way of ionizing the sputtered atoms. Related approaches, such as sustained self-sputtering, are also considered. The resulting intense flux of ions to the substrate consists of a mixture of metal and gas ions when using a process gas, or of metal ions only when using `gasless? or pure self-sputtering. In many respects, processing with HIPIMS plasmas is similar to processing with filtered cathodic arc plasmas, though the former is easier to scale to large areas. Both ion implantation and etching (high bias voltage, without deposition) and thin film deposition (low bias, or bias of low duty cycle) have been demonstrated.

Anders, Andre

2009-09-01T23:59:59.000Z

360

Design and Operational Planning of Energy Networks Based on Combined Heat and Power Units  

Science Journals Connector (OSTI)

For each time period and sector, big-M constraints 13 model the heat (generated by the energy generator installed in the sector) transferred to the heat storage tank of the sector (Q?sit). ... Heat and electricity demand data for the reference case have been taken from the Milton Keynes Energy Park data set provided by the U.K. Energy Research Centre Energy Data Centre. ... Cardoso, G.; Stadler, M.; Siddiqui, A.; Marnay, C.; Deforest, N.; Barbosa-Póvoa, A.; Ferrão, P.Microgrid reliability modeling and battery scheduling using stochastic linear programming Electric Power Syst. ...

Nikolaos E. Koltsaklis; Georgios M. Kopanos; Michael C. Georgiadis

2014-03-05T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

FPGA Based Sinusoidal Pulse Width Modulated Waveform Generation for Solar (PV) Rural Home Power Inverter  

E-Print Network (OSTI)

With the increasing concern about global environmental protection and energy demand due to rapid growth of population in developing countries and the diminishing trend of resources of conventional grid supply, the need to produce freely available pollution free natural energy such as solar/wind energy has been drawing increasing interest in every corner of the world. In an effort to utilize these energies effectively through Power converter, a great deal of research is being carried out by different researchers / scientist and engineers at different places in the world to meet the increasing demand of load. The study presents methodology to integrate solar (PV) energy (which is freely available in every corner of the world) with grid source and supplement the existing grid power in rural houses during its cut off or restricted supply period. In order to get consistency in supply a DG is also added as a standby source in the proposed integration of network. The software using novel Direct PWM modulation strate...

Singh, S N

2010-01-01T23:59:59.000Z

362

Microsoft PowerPoint - S05-04_Hoffman_Risk-Based Corrosion.ppt  

NLE Websites -- All DOE Office Websites (Extended Search)

Based Corrosion Studies at SRS Based Corrosion Studies at SRS EM Waste Processing Technical Exchange 2010 E.N. Hoffman Senior Engineer A Savannah River National Laboratory November 17th, 2010 SRNL-STI-2010-00692 Print Close 2 Risk Based Corrosion Studies at SRS, SRNL-STI-2010-00692 Contributors Tommy Edwards, SRNL Tracy Murphy, SRNL Bruce Wiersma, SRNL Philip Zapp, SRNL Brenda Garcia-Diaz, SRNL Print Close 3 Risk Based Corrosion Studies at SRS, SRNL-STI-2010-00692 Type III 1.3 Mgal 1966-1981 Type I 750 kgal 1951-1953 Type II 1.0 Mgal 1955-1956 SRS Waste Tank Design and Fabrication TYPE I and II (ASTM 285-B) Experienced stress corrosion cracking (SCC) 2 have been closed; 22 scheduled for closure by 2017 No active leak sites today TYPE III (ASTM A516-70 and A537 Class I) * Post-fabrication relief of weld residual stresses

363

Dynamic base station planning with power adaptation for green wireless cellular networks  

Science Journals Connector (OSTI)

Energy-efficient green solutions are not only beneficial for the environment but also help to reduce the energy expenditure of the investors. Since base stations ... In this work, we try to save energy by both tu...

Mehmet Aykut Yigitel; Ozlem Durmaz Incel…

2014-05-01T23:59:59.000Z

364

Reverse-Osmosis Filtration Based Water Treatment and Special Water Purification for Nuclear Power Systems  

Science Journals Connector (OSTI)

This paper is devoted to the development and operation of specialized water treatment and water purification systems, based on the principle of reverse-osmosis filtration of water, for the operation of ... P. Ale...

V. N. Epimakhov; M. S. Oleinik; L. N. Moskvin

2004-04-01T23:59:59.000Z

365

Data base of system-average dose rates at nuclear power plants: Final report  

SciTech Connect

In this work, a data base is derived of area dose rates for systems and components listed in the Energy Economic Data Base (EEDB). The data base is derived from area surveys obtained during outages at four boiling water reactors (BWRs) at three stations and eight pressurized water reactors (PWRs) at four stations. Separate tables are given for BWRs and PWRs. These tables may be combined with estimates of labor hours to provide order-of-magnitude estimates of exposure for purposes of regulatory analysis. They are only valid for work involving entire systems or components. The estimates of labor hours used in conjunction with the dose rates to estimate exposure must be adjusted to account for in-field time. Finally, the dose rates given in the data base do not reflect ALARA considerations. 11 refs., 2 figs., 3 tabs.

Beal, S.K.; Britz, W.L.; Cohen, S.C.; Goldin, A.S.; Goldin, D.J.

1987-10-01T23:59:59.000Z

366

Improvement of load-following capacity based on the flame radiation intensity signal in a power plant  

SciTech Connect

The capability to perform fast load changes has been an important issue due to the increasing commercialization of the power market. In the traditional boiler control system, the feedback signals come from the variations of the steam pressure and the steam flow, which leads to a large time delay. Therefore, a new method for the boiler control system based on radiation intensity for improving the load-following capacity of a coal-fired power plant has been developed in this paper. The system is implemented by adding the radiation intensity of the flame to the existing boiler control system as a complement. The radiation intensity obtained by the sensor can directly reflect the input heat in the boiler, with a faster response and higher sensitivity. Field tests on a 300 MW coal-fired power plant reveal that the improved boiler control system increases the load-following capacity. At the same time, the steam pressure variations are smaller as compared with those of the existing control system. 14 refs., 19 figs., 1 tab.

Fei Wang; Qunxing Huang; Dong Liu; Jianhua Yan; Kefa Cen [Zhejiang University, Hangzhou (China). State Key Laboratory of Clean Energy Utilization

2008-05-15T23:59:59.000Z

367

Environmental externalities: Applying the concept to Asian coal-based power generation  

SciTech Connect

This report examines the concept of environmental externality. It discusses various factors -- the atmospheric transformations, relationship of point-source emissions to ambient air quality, dose-response relationships, applicable cause-and-effect principles, and risk and valuation research -- that are considered by a number of state utilities when they apply the environmental externality concept to energy resource planning. It describes a methodology developed by Argonne National Laboratory for general use in resource planning, in combination with traditional methods that consider the cost of electricity production. Finally, it shows how the methodology can be applied in Indonesia, Thailand, and Taiwan to potential coal-fired power plant projects that will make use of clean coal technologies.

Szpunar, C.B.; Gillette, J.L.

1993-03-01T23:59:59.000Z

368

Analysis of combined cooling, heating, and power systems based on source primary energy consumption  

Science Journals Connector (OSTI)

Combined cooling, heating, and power (CCHP) is a cogeneration technology that integrates an absorption chiller to produce cooling, which is sometimes referred to as trigeneration. For building applications, CCHP systems have the advantage to maintain high overall energy efficiency throughout the year. Design and operation of CCHP systems must consider the type and quality of the energy being consumed. Type and magnitude of the on-site energy consumed by a building having separated heating and cooling systems is different than a building having CCHP. Therefore, building energy consumption must be compared using the same reference which is usually the primary energy measured at the source. Site-to-source energy conversion factors can be used to estimate the equivalent source energy from site energy consumption. However, building energy consumption depends on multiple parameters. In this study, mathematical relations are derived to define conditions a CCHP system should operate in order to guarantee primary energy savings.

Nelson Fumo; Louay M. Chamra

2010-01-01T23:59:59.000Z

369

Uncertainty of Radiant Power Calibration based on Synchrotron Radiation caused by Spectral Distribution and Polarization State  

SciTech Connect

We have been attempting to establish an absolute scale of spectral radiance in ultraviolet and vacuum ultraviolet regions by using synchrotron radiation as a primary standard light source and also attempting to transfer the absolute scale to an under-test light source by comparing the under-test source with synchrotron radiation. The calibration apparatus does not function as ideal comparator because some properties of incident radiation, which are spectral distribution and polarization state, are different between synchrotron radiation and the under-test light source, and the signal of the apparatus accordingly depends on not only spectral radiant power but also depends on the properties of the incident radiation. We evaluated how the detector signal ratio was affected by the difference both experimentally and theoretically, and also evaluated the uncertainty of the scale transfer caused by the difference.

Zama, Tatsuya; Saito, Ichiro [National Institute of Advanced Industrial Science and Technology (AIST), National Metrology Institute of Japan (NMIJ) (Japan)

2010-06-23T23:59:59.000Z

370

Power-Law NLED-Based Magnetic Universe Can Mimic Phantom Behavior  

E-Print Network (OSTI)

We study the cosmic dynamics of a magnetic universe supported by non-linear electrodynamics (NLED) Lagrangeans that are proportional to powers of the electromagnetic invariant $\\propto F^{1/(1-m)}$ ($m$ is an overall constant). For simplicity we focus in the case when $F$ depends on the magnetic field alone, a case dubbed in the bibliography as ''magnetic universe''. Our results demonstrate that, depending on the values of the free parameter $m$, the magnetic field can mimic phantom field behavior, an effect previously found in other contexts. It is demonstrated that, since there are found equilibrium points in the phase space of these models that can be associated with magnetic-dominated past and future attractors, a combination of positive and negative powers of $F$ may lead to interesting cosmological behavior. In particular, a cosmological scenario where the universe might evolve from a past NLED-driven (non-inflationary) state into a future (late-time) -- also NLED-driven -- inflationary stage, transiting through a matter-dominated solution, is envisioned. The impact of braneworld gravity on the dynamics driven by such NLED Lagrangeans is also investigated. It is demonstrated that, due to phantom property at late times, the non-linear electromagnetic effects may play an important role in deciding the fate of the cosmic evolution. Randall-Sundrum brane effects, in particular, modify the nature of the starting point of the cosmic evolution, as well as the fate of the expansion: both, the big bang singularity and the big rip event -- inherent in general relativity with phantom matter source --, may be avoided.

Ricardo García-Salcedo; Tame Gonzalez; Claudia Moreno; Israel Quiros

2010-06-11T23:59:59.000Z

371

Wafer-scale surface roughening for enhanced light extraction of high power AlGaInP-based light-emitting diodes  

Science Journals Connector (OSTI)

A new approach to surface roughening was established and optimized in this paper for enhancing the light extraction of high power AlGaInP-based LEDs, by combining ultraviolet (UV)...

Park, Hyeong-Ho; Zhang, Xin; Cho, Yunae; Kim, Dong-Wook; Kim, Joondong; Lee, Keun Woo; Choi, Jehyuk; Lee, Hee Kwan; Jung, Sang Hyun; Her, Eun Jin; Kim, Chang Hwan; Moon, A-Young; Shin, Chan-Soo; Shin, Hyun-Beom; Sung, Ho Kun; Park, Kyung Ho; Park, Hyung-Ho; Kim, Hi-Jung; Kang, Ho Kwan

2014-01-01T23:59:59.000Z

372

Exergy and exergoeconomic analysis and optimisation of diesel engine based Combined Heat and Power (CHP) system using genetic algorithm  

Science Journals Connector (OSTI)

In the present study, a diesel engine based Combined Heat and Power (CHP) system is optimised using exergoeconomic concept and genetic algorithm. For this purpose, the CHP system is first thermodynamically analysed through energy and exergy. Then cost balances and auxiliary equations are applied to subsystems. Finally an objective function representing fuel cost, cost of exergy loss and destruction and purchase and maintenance cost of the system components is considered for the optimisation study. Furthermore the above procedure is applied for a case study that produces 277 kW of electricity and 282 kW of heat. Also exergetic and exergoeconomic parameters are calculated in optimum case and compared with the base case. The results show that by applying the optimisation approach for our case study, 8.02% reduction in objective function is achieved which is might be considerable in CHP systems optimisation.

Farzad Mohammadkhani; Shahram Khalilarya; Iraj Mirzaee

2013-01-01T23:59:59.000Z

373

Nanowire-Composite based Flexible Thermoelectric Nanogenerators and Self-Powered Temperature Sensors  

E-Print Network (OSTI)

) polymer composite as the thermoelectric material with a positive Seebeck coefficient of 285 V/K. A linearNano Res 1 Nanowire-Composite based Flexible Thermoelectric Nanogenerators and Self School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332

Wang, Zhong L.

374

European Wind Energy Conference 2007 Milan Measurement based analysis of active and reactive power  

E-Print Network (OSTI)

European Wind Energy Conference 2007 ­ Milan 1 Measurement based analysis of active and reactive to the network through distribution systems. Because the production units, the distribution systems units will cover consumption in the vicinity. This can contribute to the reduction of the system losses

375

Power estimation and reliability evaluation of municipal waste water and self-excited induction generator-based micro hydropower generation system  

Science Journals Connector (OSTI)

This paper presents power estimation and reliability evaluation of the micro hydro power generation system based on municipal waste water. Self-excited induction generator was used in the developed power plant, situated at IIT (BHU) campus, Varanasi, India. The hydro potential of the waste water flowing through sewage system of the Banaras Hindu University has been determined for annual flow duration and daily flow duration curves by ordering the recorded waste water from maximum to minimum flows. This paper estimates output power and determines reliability indices like: failure rate, repair rate, MTTF, MTTR and MTBF of the MWW-based developed generation plant. Design parameters of the SEIG with suitable values of the capacitor have been used and recommended for improvement of the power generation quality and reliability of the system.

Lokesh Varshney; R.K. Saket; Saeid Eslamian

2013-01-01T23:59:59.000Z

376

MW-class hybrid power system based on planar solid oxide stack technology  

NLE Websites -- All DOE Office Websites (Extended Search)

Scale-Up of Planar SOFC Stack Scale-Up of Planar SOFC Stack Technology for MW-Level Combined Cycle System Final Report TIAX LLC Acorn Park Cambridge, Massachusetts 02140-2390 Reference: D0136 Submitted to NETL October 3, 2003 1 NETL-Hybrid Scale-UP/D0136/SS/V1 1 Executive Summary 2 Background, Objectives & Approach 3 SOFC Cell Geometry and Modeling 4 SOFC Power Scale-up 5 System Design and Costs 6 Conclusions & Recommendations A Appendix 2 NETL-Hybrid Scale-UP/D0136/SS/V1 Executive Summary SECA Strategy NETL wanted to understand if and how SECA-style anode-supported SOFC stacks could be scaled-up for use in MW-level combined cycle plants. * SECA strategy relies on the use of modular, mass produced, SOFC stacks in the 3 - 10 kW capacity range for a wide range of applications. * Technical feasibility small-scale applications has been evaluated by SECA:

377

Computer–Based Procedures for Nuclear Power Plant Field Workers: Preliminary Results from Two Evaluation Studies  

SciTech Connect

The Idaho National Laboratory and participants from the U.S. nuclear industry are collaborating on a research effort aimed to augment the existing guidance on computer-based procedure (CBP) design with specific guidance on how to design CBP user interfaces such that they support procedure execution in ways that exceed the capabilities of paper-based procedures (PBPs) without introducing new errors. Researchers are employing an iterative process where the human factors issues and interface design principles related to CBP usage are systematically addressed and evaluated in realistic settings. This paper describes the process of developing a CBP prototype and the two studies conducted to evaluate the prototype. The results indicate that CBPs may improve performance by reducing errors, but may increase the time it takes to complete procedural tasks.

Katya L Le Blanc; Johanna H Oxstrand

2013-10-01T23:59:59.000Z

378

Artificial neural network based models for forecasting electricity generation of grid connected solar PV power plant  

Science Journals Connector (OSTI)

This paper presents an artificial neural network (ANN) approach for forecasting the performance of electric energy generated output from a working 25-kWp grid connected solar PV system and a 100-kWp grid connected PV system installed at Minicoy Island of Union Territory of Lakshadweep Islands. The ANN interpolates among the solar PV generation output and relevant parameters such as solar radiation, module temperature and clearness index. In this study, three ANN models are implemented and validated with reasonable accuracy on real electric energy generation output data. The first model is univariate based on solar radiation and the output values. The second model is a multivariate model based on module temperature along with solar radiation. The third model is also a multivariate model based on module temperature, solar radiation and clearness index. A forecasting performance measure such as percentage root mean square error has been presented for each model. The second model, which gives the most accurate results, has been used in forecasting the generation output for another PV system with similar accuracy.

Imtiaz Ashraf; A. Chandra

2004-01-01T23:59:59.000Z

379

Request for Information for Distributed Wind Energy Systems ...  

Office of Environmental Management (EM)

or micro grid (to support local grid operations or offset nearby loads). Because wind turbines are characterized as being used in a "distributed application" based upon their...

380

Auxiliary feedwater system risk-based inspection guide for the Byron and Braidwood nuclear power plants  

SciTech Connect

In a study sponsored by the US Nuclear Regulatory Commission (NRC), Pacific Northwest Laboratory has developed and applied a methodology for deriving plant-specific risk-based inspection guidance for the auxiliary feedwater (AFW) system at pressurized water reactors that have not undergone probabilistic risk assessment (PRA). This methodology uses existing PRA results and plant operating experience information. Existing PRA-based inspection guidance information recently developed for the NRC for various plants was used to identify generic component failure modes. This information was then combined with plant-specific and industry-wide component information and failure data to identify failure modes and failure mechanisms for the AFW system at the selected plants. Byron and Braidwood were selected for the fourth study in this program. The produce of this effort is a prioritized listing of AFW failures which have occurred at the plants and at other PWRs. This listing is intended for use by NRC inspectors in the preparation of inspection plans addressing AFW risk-important components at the Byron/Braidwood plants. 23 refs., 1 fig., 1 tab.

Moffitt, N.E.; Gore, B.F.: Vo, T.V. (Pacific Northwest Lab., Richland, WA (USA))

1991-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Auxiliary feedwater system risk-based inspection guide for the H. B. Robinson nuclear power plant  

SciTech Connect

In a study sponsored by the US Nuclear Regulatory Commission (NRC), Pacific Northwest Laboratory has developed and applied a methodology for deriving plant-specific risk-based inspection guidance for the auxiliary feedwater (AFW) system at pressurized water reactors that have not undergone probabilistic risk assessment (PRA). This methodology uses existing PRA results and plant operating experience information. Existing PRA-based inspection guidance information recently developed for the NRC for various plants was used to identify generic component failure modes. This information was then combined with plant-specific and industry-wide component information and failure data to identify failure modes and failure mechanisms for the AFW system at the selected plants. H. B. Robinson was selected as one of a series of plants for study. The product of this effort is a prioritized listing of AFW failures which have occurred at the plant and at other PWRs. This listing is intended for use by NRC inspectors in the preparation of inspection plans addressing AFW risk-important components at the H. B. Robinson plant.

Moffitt, N.E.; Lloyd, R.C.; Gore, B.F.; Vo, T.V. [Pacific Northwest Lab., Richland, WA (United States); Garner, L.W. [Nuclear Regulatory Commission, Washington, DC (United States)

1993-08-01T23:59:59.000Z

382

Auxiliary feedwater system risk-based inspection guide for the McGuire nuclear power plant  

SciTech Connect

In a study sponsored by the US Nuclear Regulatory Commission (NRC), Pacific Northwest Laboratory has developed and applied a methodology for deriving plant-specific risk-based inspection guidance for the auxiliary feedwater (AFW) system at pressurized water reactors that have not undergone probabilistic risk assessment (PRA). This methodology uses existing PRA results and plant operating experience information. Existing PRA-based inspection guidance information recently developed for the NRC for various plants was used to identify generic component failure modes. This information was then combined with plant-specific and industry-wide component information and failure data to identify failure modes and failure mechanisms for the AFW system at the selected plants. McGuire was selected as one of a series of plants for study. The product of this effort is a prioritized listing of AFW failures which have occurred at the plant and at other PWRs. This listing is intended for use by NRC inspectors in the preparation of inspection plans addressing AFW risk-important components at the McGuire plant.

Bumgardner, J.D.; Lloyd, R.C.; Moffitt, N.E.; Gore, B.F.; Vo, T.V. [Pacific Northwest Lab., Richland, WA (United States)

1994-05-01T23:59:59.000Z

383

Auxiliary feedwater system risk-based inspection guide for the South Texas Project nuclear power plant  

SciTech Connect

In a study sponsored by the US Nuclear Regulatory Commission (NRC), Pacific Northwest Laboratory has developed and applied a methodology for deriving plant-specific risk-based inspection guidance for the auxiliary feedwater (AFW) system at pressurized water reactors that have not undergone probabilistic risk assessment (PRA). This methodology uses existing PRA results and plant operating experience information. Existing PRA-based inspection guidance information recently developed for the NRC for various plants was used to identify generic component failure modes. This information was then combined with plant-specific and industry-wide component information and failure data to identify failure modes and failure mechanisms for the AFW system at the selected plants. South Texas Project was selected as a plant for study. The product of this effort is a prioritized listing of AFW failures which have occurred at the plant and at other PWRs. This listing is intended for use by the NRC inspectors in preparation of inspection plans addressing AFW risk important components at the South Texas Project plant.

Bumgardner, J.D.; Nickolaus, J.R.; Moffitt, N.E.; Gore, B.F.; Vo, T.V. [Pacific Northwest Lab., Richland, WA (United States)

1993-12-01T23:59:59.000Z

384

Concept of development of nuclear power based on LMFBR operation in open nuclear fuel cycle  

SciTech Connect

The preliminary assessments performed show that it is reasonable to investigate in the future the possibilities of FBR efficient operation with the open NFC. To improve its safety it is expedient to use the lead-bismuth alloy as a coolant. In order to operate with depleted uranium make-up it is necessary to meet a number of requirements providing the reactor criticality due to plutonium build-up and BR > 1. These requirements are as follows: a large core (20--25 m{sup 3}); a high fuel volume fraction (> 60%); utilization of dense metallic fuel; a high fuel burn-up--at a level of 20% of h.a. Making use of these reactors should allow the NP fuel base to be extended more than 10 times without making NFC closed. It provides improving NP safety during a sufficiently long stage of its development.

Toshinsky, G.I. [Inst. of Physics and Power Engineering, Obninsk (Russian Federation)

1996-08-01T23:59:59.000Z

385

Harmonics and inter harmonics estimation of DFIG based standalone wind power system by parametric techniques  

Science Journals Connector (OSTI)

Abstract This paper presents application of parametric techniques (Estimation of signal parameter by rotational invariance techniques (ESPRIT), Root multiple signal classification (Root MUSIC)) for the estimation of harmonics/inter harmonics produced by wind generator under constant, variable rotor speed, load imbalance. Accuracy of estimation by parametric techniques is checked on synthetic signal as well as signal extracted from DFIG based standalone system with constant rotor speed and balanced load condition. Further sliding window concept is applied to parametric techniques to estimate the harmonics/inter harmonics under variable rotor speed and load unbalance. Series of simulation results demonstrate the advantages of the sliding window ESPRIT over sliding window Root MUSIC in the estimation of harmonics and inter harmonics under variable rotor speed as well as load unbalance condition.

Sanjay Agrawal; Soumya R. Mohanty; Vineeta Agarwal

2015-01-01T23:59:59.000Z

386

Electric power grid control using a market-based resource allocation system  

DOE Patents (OSTI)

Disclosed herein are representative embodiments of methods, apparatus, and systems for distributing a resource (such as electricity) using a resource allocation system. In one exemplary embodiment, a plurality of requests for electricity are received from a plurality of end-use consumers. The requests indicate a requested quantity of electricity and a consumer-requested index value indicative of a maximum price a respective end-use consumer will pay for the requested quantity of electricity. A plurality of offers for supplying electricity are received from a plurality of resource suppliers. The offers indicate an offered quantity of electricity and a supplier-requested index value indicative of a minimum price for which a respective supplier will produce the offered quantity of electricity. A dispatched index value is computed at which electricity is to be supplied based at least in part on the consumer-requested index values and the supplier-requested index values.

Chassin, David P

2014-01-28T23:59:59.000Z

387

An Heuristic Drift-Based Model of the Power Scrape-Off Width in H-Mode Tokamaks  

SciTech Connect

An heuristic model for the plasma scrape-off width in H-mode plasmas is introduced. Grad B and curv B drifts into the SOL are balanced against sonic parallel flows out of the SOL, to the divertor plates. The overall mass flow pattern posited is a modification for open field lines of Pfirsch-Shlüter flows to include sinks to the divertors. These assumptions result in an estimated SOL width of 2a?p/R. They also result in a first-principles calculation of the particle confinement time of H-mode plasmas, qualitatively consistent with experimental observations. It is next assumed that anomalous perpendicular electron thermal diffusivity is the dominant source of heat flux across the separatrix, investing the SOL width, defined above, with heat from the main plasma. The separatrix temperature is calculated based on a two-point model balancing power input to the SOL with Spitzer-Härm parallel thermal conduction losses to the divertor. This results in an heuristic closed-form prediction for the power scrape-off width that is in remarkable quantitative agreement both in absolute magnitude and in scaling with recent experimental data. Further work should include full numerical calculations, including all magnetic and electric drifts, as well as more thorough comparison with experimental data.

Robert J. Goldston

2011-02-28T23:59:59.000Z

388

Heuristic Drift-based Model of the Power Scrape-off width in H-mode Tokamaks  

SciTech Connect

An heuristic model for the plasma scrape-off width in H-mode plasmas is introduced. Grad B and curv B drifts into the SOL are balanced against sonic parallel flows out of the SOL, to the divertor plates. The overall particle flow pattern posited is a modification for open field lines of Pfirsch-Shlüter flows to include sinks to the divertors. These assumptions result in an estimated SOL width of ~ 2a?p/R. They also result in a first-principles calculation of the particle confinement time of H-mode plasmas, qualitatively consistent with experimental observations. It is next assumed that anomalous perpendicular electron thermal diffusivity is the dominant source of heat flux across the separatrix, investing the SOL width, defined above, with heat from the main plasma. The separatrix temperature is calculated based on a two-point model balancing power input to the SOL with Spitzer-Härm parallel thermal conduction losses to the divertor. This results in a heuristic closed-form prediction for the power scrape-off width that is in reasonable quantitative agreement both in absolute magnitude and in scaling with recent experimental data from deuterium plasmas. Further work should include full numerical calculations, including all magnetic and electric drifts, as well as more thorough comparison with experimental data.

Robert J. Goldston

2011-04-29T23:59:59.000Z

389

Wind speed and power density analysis based on Weibull and Rayleigh distributions (a case study: Firouzkooh county of Iran)  

Science Journals Connector (OSTI)

Abstract The present study aimed to analyze the wind speed data of Firouzkooh region. For this purpose, the wind speed data for a 3-h period measuring over a 10-year period (2001–2010) were analyzed to calculate and estimate the wind power generation potential. Similar trends of the wind speeds were seen in different years where the highest and the lowest mean wind speeds belonged to May 2010 and June 2002, respectively. The diurnal wind speed analysis demonstrated that the fastest winds blew from 6 am to 3 pm. Weibull and Rayleigh distribution functions were applied to find out the best fitting tool to the wind speed data. Results showed that Weibull and Rayleigh distribution functions can fit the actual values of wind speed well with almost the same coefficient of determination value (R2) of 0.97. The average values of wind power based on mean and root mean cube speed approaches were 203 and 248 W m?2 year?1, respectively indicating that Firouzkooh region stands in class 4 (which is a suitable area for wind turbine establishment). Finally, wind rose diagram revealed that the prevailing wind direction falls in the sector between 180° and 270° clockwise from North.

S.H. Pishgar-Komleh; A. Keyhani; P. Sefeedpari

2015-01-01T23:59:59.000Z

390

Self-powered solid-state photodetector based on TiO{sub 2} nanorod/spiro-MeOTAD heterojunction  

SciTech Connect

A nanostructured solid-state photodetector based on an inorganic/organic semiconductor heterojunction of TiO{sub 2} nanorod/spiro-MeOTAD is constructed. Spiro-MeOTAD serves as the active absorption layer and TiO{sub 2} offers a direct pathway for electron transport. A maximum photoresponsivity of 0.01?A/W was observed under illumination of 410?nm at 0?V bias. The time response (decay time is 0.06?s and rise time is 0.12?s) was observed to be rapid. The self-powered device is a promising candidate for application in high-sensitivity and high-speed blue light photodetectors. These results provided a simple way to fabricate low-cost, high spectrum selectivity hybrid photodetector with large area.

Xie, Yanru; Li, Qinghao; Wei, Guodong; Wang, Dong; Chen, Yanxue, E-mail: cyx@sdu.edu.cn; Yan, Shishen; Liu, Guolei; Mei, Liangmo [School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 (China)] [School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 (China); Wei, Lin [School of Information Science and Engineering, Shandong University, Jinan 250100 (China)] [School of Information Science and Engineering, Shandong University, Jinan 250100 (China); Jiao, Jun [Department of Mechanical and Materials Engineering, Portland State University, P.O. Box 751, Portland, Oregon 97207-0751 (United States)] [Department of Mechanical and Materials Engineering, Portland State University, P.O. Box 751, Portland, Oregon 97207-0751 (United States)

2013-12-23T23:59:59.000Z

391

IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 16, NO. 4, NOVEMBER 2001 933 Discussion on "Review of Usage-Based Transmission Cost  

E-Print Network (OSTI)

of Usage-Based Transmission Cost Allocation Methods Under Open Access" Juan Zolezzi, Hugh Rudnick., IEEE Trans. Power Systems, vol. 15, no. 4, pp. 1218­1224, November 2000. Discussion of "Review of Usage comparing a variety of usage-based transmission charges. This discusser would like to make two points about

Catholic University of Chile (Universidad Católica de Chile)

392

Multicriteria decision analysis based on analytic hierarchy process in GIS environment for siting nuclear power plant in Egypt  

Science Journals Connector (OSTI)

Abstract Due to increasing demand of electrical energy and freshwater in Egypt, it is safe to assume that the decision makers will turn to nuclear power as the feasible alternative for energy. However, as time goes by, fewer sites will be available and suitable for nuclear power plant development. Site selection is a key phase of the siting process of a nuclear plant and may significantly affect the safety and cost of the facility during its entire life cycle. The siting of nuclear power plants is one of multi-criteria problems, which makes it complex. Many interrelated factors affect the process. Six constraints and twenty-two factors corresponding to safety, environment and socio-economy were considered in the siting study presented in this paper. Multi-Criteria Decision Analysis was applied during the selection of nuclear power plants site using GIS software. Three spatial decision making models were applied in this paper during site selection stage. The binary overlay (Boolean logic) with Low Risk approach in which the logical OR operator is used to determine the candidate areas. All constraints were represented in binary maps, combined and a masking layer was created to eliminate the lands considered as constraints in Arc GIS Software. The 22 factors were represented in normalized maps after unifying all of them to 0–1 score scales based on the philosophy of suitability criteria (factors) using the Weighted Linear Combination (WLC) method. The relative scores and weight of factors which were used in the maps conducted by pairwise comparison were fed into Expert choice software that runs the Analytic Hierarchy Process. Final composite map of potential site priorities were represented by several polygons produced in MCDA add-in as an open source tool in Arc GIS 10.1. Four sites, all located along the North western and the Red Sea coasts were chosen as Candidate sites after eliminating the lowest scoring sites The Analytic Hierarchy Process (AHP) was used to select a suitable site by pairwise comparison and by calculating eigenvectors using Expert Choice software. The sites were ranked to determine the most desirable site. The El Dabaa site was found to be most suitable, followed by the East El Negila site on the Mediterranean Sea.

A.M. Abudeif; A.A. Abdel Moneim; A.F. Farrag

2015-01-01T23:59:59.000Z

393

Submersion Criticality Safety Analysis of Tungsten-Based Fuel for Nuclear Power and Propulsion Applications  

SciTech Connect

The Center for Space Nuclear Research (CSNR) is developing tungsten-encapsulated fuels for space nuclear applications. Aims to develop NTP fuels that are; Affordable Low impact on production and testing environment Producible on a large scale over suitable time period Higher-performance compared to previous graphite NTP fuel elements Space nuclear reactors remain subcritical before and during launch, and do not go critical until required by its mission. A properly designed reactor will remain subcritical in any launch abort scenario, where the reactor falls back to Earth and becomes submerged in terrestrial material. Submersion increases neutron reflection and thermalizes the neutrons, which typically increases the reactivity of the core. This effect is usually very significant for fast-spectrum reactors. This research provided a submersion criticality safety analysis for a representative tungsten/uranium oxide fueled reactor. Determine the submersion behavior of a reactor fueled by tungsten-based fuel. Considered fuel compositions with varying: Rhenium content (wt% rhenium in tungsten) Fuel loading fractions (UO2 vol%)

A.E. Craft; R. C. O'Brien; S. D. Howe; J. C. King

2014-07-01T23:59:59.000Z

394

A Novel Integrated TPV Power Generation System Based on a Cascaded Radiant Burner  

Science Journals Connector (OSTI)

A cascaded radiant burner has been developed and based on this burner a novel integrated TPV system has been built. In this system low bandgap GaSb cells and silicon concentrator solar cells are employed integratedly. The unique cascaded radiant burner consists of two different radiators which cascade?emit two streams of radiation with different spectra. The two different radiators are arranged in tandem with their surface temperatures being different as well. Two streams of radiation output are matched respectively to the bandgaps of silicon cells and GaSb cells. Thus one stream of radiation output illuminates silicon concentrator solar cells while the other drives low bandgap GaSb cells in the integrated system. In this work the combustion performance of the cascaded radiant burner was investigated at varying degrees of exhaust heat recuperation. The electrical output characteristics of both silicon concentrator solar cells and GaSb cells in the gas combustion?driven TPV system were measured under various operating conditions. It is shown that this innovative design considerably increases the TPV system efficiency due to the cascaded utilization of heat released during natural gas combustion and the optimized thermal management.

K. Qiu; A. C. S. Hayden

2004-01-01T23:59:59.000Z

395

Modeling, analysis and comparison of TSR and OTC methods for MPPT and power smoothing in permanent magnet synchronous generator-based wind turbines  

Science Journals Connector (OSTI)

Abstract This paper presents a small signal modeling of a direct-driven permanent magnet synchronous generator (PMSG) based on wind turbine which is connected to the grid via back-to-back converters. The proposed small signal model includes two maximum power point tracking (MPPT) controllers: tip speed ratio (TSR) control and optimal torque control (OTC). These methods are analytically compared to illustrate MPPT and power smoothing capability. Then, to compare the MPPT and power smoothing operation of the mentioned methods, simulations are performed in MATLAB/Simulink software. From the simulation results, OTC is highly efficient in power smoothing enhancement and has clearly good performance to extract maximum power from wind; however, TSR control has definitely fast responses to wind speed variations with the expense of higher fluctuations due to its non-minimum phase characteristic.

M. Nasiri; J. Milimonfared; S.H. Fathi

2014-01-01T23:59:59.000Z

396

Analyzing Wind Power Potential in Cauvery Delta Areas for Implementation of Renewable Energy based Standalone Pumping System for Irrigation  

Science Journals Connector (OSTI)

Abstract The power demand plays vital role in economic development of the country. Industrial development is mainly depending on power .Tamilnadu faces severe power demand of around 18 percent and the Wind power generation is not utilized properly because of the weak grid and lack of energy storage units. For the agriculture the power is free of cost .This paper suggests the innovative non grid high power pumping system for irrigation to reduce the demand on grid and to improve the economy of Tamilnadu Electricity board.

B. Shanthi saravana; V. Rajini; A. Paramasivam

2013-01-01T23:59:59.000Z

397

Thermodynamic analysis of a low-pressure economizer based waste heat recovery system for a coal-fired power plant  

Science Journals Connector (OSTI)

Abstract An LPE (low-pressure economizer) based waste heat recovery system for a CFPP (coal-fired power plant) is investigated thermodynamically. With the installation of LPE in the flue before the FGD (flue gas desulfurizer), the heat contained in the exhaust flue gas can be recovered effectively and the water consumption can be reduced in the FGD resulted from the temperature dropped flue gas. The impacts on the related apparatuses after installing LPE in a CFPP are analyzed and the internal relationships among correlated parameters are presented. The efficiencies of LPE installed in a CFPP evaluated by the first law, the second law and the thermal equilibrium efficiencies are also compared and analyzed. A detailed case study based on a 350 MW CFPP unit is presented and the variations of the thermal performance after the installation of LPE are investigated. The results show that the second law and the thermal equilibrium efficiencies are increased which can be indicators to evaluate the performance of the LPE system while the first law efficiency is decreased after installing LPE. Results also show that the saving of SCE (standard coal equivalent) is 3.85 g/(kW·h) for this CFPP unit under full load after installing LPE.

Chaojun Wang; Boshu He; Linbo Yan; Xiaohui Pei; Shinan Chen

2014-01-01T23:59:59.000Z

398

Economic evaluations of coal-based combustion and gasification power plants with post-combustion CO2 capture using calcium looping cycle  

Science Journals Connector (OSTI)

Abstract Coal-based power generation sector is facing important changes to implement energy efficient carbon capture technologies to comply with emission reduction targets for transition to low carbon economy. This paper assesses CaL (Calcium Looping) as one of the innovative carbon capture options able to deliver low energy and cost penalties. The work evaluates how the integration of post-combustion calcium looping influences the economics of power plants providing up-dated techno-economic indicators. Coal-based combustion plants operated in both sub- and super-critical steam conditions were evaluated, as well as coal gasification plant using an oxygen-blown entrained-flow gasifier. As benchmark options used to quantify the carbon capture energy and cost penalties, the same power generation technologies were evaluated without CCS (Carbon capture and storage). The power plant concepts investigated in the paper generates around 545–560 MW net power with at least 90% carbon capture rate. Introduction of CaL technology for CO2 capture results in a 24–42% increase of specific capital investment, the O&M costs are increasing with 24–30% and the electricity cost with 39–48% (all compared to non-CCS cases). As the techno-economic results suggest, CaL has good application potential in combustion-based power generation.

Calin-Cristian Cormos

2014-01-01T23:59:59.000Z

399

FEPMA: fine-grained event-driven power meter for android smartphones based on device driver layer event monitoring  

Science Journals Connector (OSTI)

This paper introduces a novel sensor-less, event-driven power analysis framework called FEPMA for providing highly accurate and nearly instantaneous estimates of power dissipation in an Android smartphone. The key idea is to collect and correctly record ...

Kitae Kim; Donghwa Shin; Qing Xie; Yanzhi Wang; Massoud Pedram; Naehyuck Chang

2014-03-01T23:59:59.000Z

400

Power Performance Measurements of the NREL CART-2 Wind Turbine Using a Nacelle-Based Lidar Scanner  

Science Journals Connector (OSTI)

Different certification procedures in wind energy, such as power performance testing or load estimation, require measurements of the wind speed, which is set in relation to the electrical power output or the turbine loading. The wind shear affects ...

Andreas Rettenmeier; David Schlipf; Ines Würth; Po Wen Cheng

2014-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Research of Least Square Support Vector Machine Based on Chaotic Time Series in Power Load Forecasting Model  

Science Journals Connector (OSTI)

To predict short-term power load in an effective and fast way, the ... are also determined. And then the continuous power load data are transformed into data matrix by using the theory of phase- ... LSSVM is used...

Wei Sun; Chenguang Yang

2006-01-01T23:59:59.000Z

402

Thermionic power generation. January 1970-December 1980 (citations from the Engineering Index Data Base). Report for January 1970-December 1980  

SciTech Connect

Research on thermionic power generation, power plant design, converter design, and basic research on thermionic materials are cited in the bibliography. Spacecraft applications are also included. (Contains 138 citations, fully indexed and including a table of contents.)

Not Available

1980-12-01T23:59:59.000Z

403

Reuse of Treated Internal or External Wastewaters in the Cooling Systems of Coal-Based Thermoelectric Power Plants  

SciTech Connect

This study evaluated the feasibility of using three impaired waters - secondary treated municipal wastewater, passively treated abandoned mine drainage (AMD), and effluent from ash sedimentation ponds at power plants - for use as makeup water in recirculating cooling water systems at thermoelectric power plants. The evaluation included assessment of water availability based on proximity and relevant regulations as well as feasibility of managing cooling water quality with traditional chemical management schemes. Options for chemical treatment to prevent corrosion, scaling, and biofouling were identified through review of current practices, and were tested at bench and pilot-scale. Secondary treated wastewater is the most widely available impaired water that can serve as a reliable source of cooling water makeup. There are no federal regulations specifically related to impaired water reuse but a number of states have introduced regulations with primary focus on water aerosol 'drift' emitted from cooling towers, which has the potential to contain elevated concentrations of chemicals and microorganisms and may pose health risk to the public. It was determined that corrosion, scaling, and biofouling can be controlled adequately in cooling systems using secondary treated municipal wastewater at 4-6 cycles of concentration. The high concentration of dissolved solids in treated AMD rendered difficulties in scaling inhibition and requires more comprehensive pretreatment and scaling controls. Addition of appropriate chemicals can adequately control corrosion, scaling and biological growth in ash transport water, which typically has the best water quality among the three waters evaluated in this study. The high TDS in the blowdown from pilot-scale testing units with both passively treated mine drainage and secondary treated municipal wastewater and the high sulfate concentration in the mine drainage blowdown water were identified as the main challenges for blowdown disposal. Membrane treatment (nanofiltration or reverse osmosis) can be employed to reduce TDS and sulfate concentrations to acceptable levels for reuse of the blowdown in the cooling systems as makeup water.

Radisav Vidic; David Dzombak; Ming-Kai Hsieh; Heng Li; Shih-Hsiang Chien; Yinghua Feng; Indranil Chowdhury; Jason Monnell

2009-06-30T23:59:59.000Z

404

Micro-grid State Estimation Using Belief Propagation on Factor Graphs  

E-Print Network (OSTI)

devices such as Advanced Metering Infras- tructure (AMI) and Phase Measurement Unit (PMU) requires huge energy resources and enable a future self-dispatch and self- healing grid. This would first require Belief Propagation (BP) algorithm. The purpose is that given incomplete measurements, marginal

Kavcic, Aleksandar

405

Techno-economic evaluation of an ammonia-based post-combustion process integrated with a state-of-the-art coal-fired power plant  

Science Journals Connector (OSTI)

Abstract A techno-economic evaluation of the application of an ammonia-based post-combustion CO2 capture system to an existing, state-of-the-art, coal-fired power plant. The study comprised an assessment of the ammonia-based capture process together with a detailed cost analysis, based on which the overall design of the capture process is presented, including a power plant integration strategy and estimates of the specific CO2 capture cost (€/tCO2). The evaluations of the power plant and the CO2 capture plant were based on process modeling. The cost analysis was based on the installed cost of each unit in the equipment list derived from the process simulation, which was determined using detailed-factor estimation. We show that the steam required for a CO2 capture efficiency of 90% lowers the electric output from 408.0 MWel to 341.8 MWel. The capital expenditure related to the retrofit of the reference power plant with CO2 capture is 230M€ and the operating expenditure is determined to be 66.5M€/year, corresponding to a relative capture cost of 35€/tCO2. Furthermore, the present work proposes design improvements that may reduce the cost of capture to 31€/tCO2.

Henrik Jilvero; Nils-Henrik Eldrup; Fredrik Normann; Klas Andersson; Filip Johnsson; Ragnhild Skagestad

2014-01-01T23:59:59.000Z

406

Integrating solar Organic Rankine Cycle into a coal-fired power plant with amine-based chemical absorption for CO2 capture  

Science Journals Connector (OSTI)

Abstract A novel system integrating solar Organic Rankine Cycle (ORC) into a power plant with amine-based chemical absorption for CO2 capture is proposed. The condensation heat of ORC provides the required heat for solvent regeneration, which avoids the energy penalty caused by the steam extraction traditionally. The cascade utilization of solar energy is realized through a combined supply of power generation and condensation heat. From the aspects of technology and economics, a performance analysis is presented to compare the proposed system and three other systems based on a 300 MWe power plant. The proposed system shows better performance than that of reference systems in the power generation and emission reductions. Economic evaluation was conducted in terms of levelized costs of electricity (LCOE) and cost of CO2 removed (COR). In order to achieve lower LCOE and COR compared to the power plant integrated with solar assisted post-combustion CO2 capture (PCC), the price of ORC has to be lower than 1284.46 USD/kW under the conditions that the price of the solar field is 120 USD/m2. It is believed that the proposed system has a satisfied potential to meet the thermal demand for the solvent regeneration in the power plant with PCC.

Li Zhao; Ruikai Zhao; Shuai Deng; Yuting Tan; Yinan Liu

2014-01-01T23:59:59.000Z

407

Environmental externalities: An ASEAN application to coal-based power generation. [Association of South East Asian Nations (ASEAN)  

SciTech Connect

Significant benefits to human health that result from emissions control programs may justify the costs of pollution control policies. Many scientists, economists, risk analysts, and policymakers believe that comparisons of the benefits with the costs of pollution control demonstrate that the US stationary source, air emissions control program is justified. This justification is based upon pronounced benefits to human health, especially from controlling suspended particulates and sulfur compounds. Market decisions are usually made on the basis of a consideration of traditional costs such as capital, operating and maintenance, fuel costs, and fixed charges. Social costs, which could be significant, are not incorporated explicitly into such decisions. These social costs could result in a net reduction in the welfare of individuals, and of society as a whole. Because these social costs and their effects are not represented in the price of energy, individual have no way to explicitly value them; hence, they remain unaccounted for in market decisions. By accounting for external costs, the selection of energy sources and production of energy products can lead to and equilibrium, where the total cost of energy and energy products, together with resulting social costs, can be brought to an economic minimum. The concept of an air emissions control program is of interest to the ASEAN countries (Brunei, Indonesia, Malaysia, the Philippines, Singapore, and Thailand) and their governments, especially if such a program could be justified in cost-benefit terms and shown to be directly applicable to ASEAN conditions. It is the intent of the effort described herein to demonstrate that technical options are available to control emissions from coal-based, electric power plants and that that costs of these options may be justified in cost-benefit terms.

Szpunar, C.B.; Gillette, J.L.

1992-06-01T23:59:59.000Z

408

Towards risk-based management of critical infrastructures : enabling insights and analysis methodologies from a focused study of the bulk power grid.  

SciTech Connect

This report summarizes research on a holistic analysis framework to assess and manage risks in complex infrastructures, with a specific focus on the bulk electric power grid (grid). A comprehensive model of the grid is described that can approximate the coupled dynamics of its physical, control, and market components. New realism is achieved in a power simulator extended to include relevant control features such as relays. The simulator was applied to understand failure mechanisms in the grid. Results suggest that the implementation of simple controls might significantly alter the distribution of cascade failures in power systems. The absence of cascade failures in our results raises questions about the underlying failure mechanisms responsible for widespread outages, and specifically whether these outages are due to a system effect or large-scale component degradation. Finally, a new agent-based market model for bilateral trades in the short-term bulk power market is presented and compared against industry observations.

Richardson, Bryan T.; LaViolette, Randall A.; Cook, Benjamin Koger

2008-02-01T23:59:59.000Z

409

Integration of biomass into urban energy systems for heat and power. Part I: An MILP based spatial optimization methodology  

Science Journals Connector (OSTI)

Abstract The paper presents a mixed integer linear programming (MILP) approach to optimize multi-biomass and natural gas supply chain strategic design for heat and power generation in urban areas. The focus is on spatial and temporal allocation of biomass supply, storage, processing, transport and energy conversion (heat and CHP) to match the heat demand of residential end users. The main aim lies on the representation of the relationships between the biomass processing and biofuel energy conversion steps, and on the trade-offs between centralized district heating plants and local heat generation systems. After a description of state of the art and research trends in urban energy systems and bioenergy modelling, an application of the methodology to a generic case study is proposed. With the assumed techno-economic parameters, biomass based thermal energy generation results competitive with natural gas, while district heating network results the main option for urban areas with high thermal energy demand density. Potential further applications of this model are also described, together with main barriers for development of bioenergy routes for urban areas.

Antonio M. Pantaleo; Sara Giarola; Ausilio Bauen; Nilay Shah

2014-01-01T23:59:59.000Z

410

Monolithic solid oxide fuel cell technology advancement for coal-based power generation. Final report, September 1989--March 1994  

SciTech Connect

This project has successfully advanced the technology for MSOFCs for coal-based power generation. Major advances include: tape-calendering processing technology, leading to 3X improved performance at 1000 C; stack materials formulations and designs with sufficiently close thermal expansion match for no stack damage after repeated thermal cycling in air; electrically conducting bonding with excellent structural robustness; and sealants that form good mechanical seals for forming manifold structures. A stack testing facility was built for high-spower MSOFC stacks. Comprehensive models were developed for fuel cell performance and for analyzing structural stresses in multicell stacks and electrical resistance of various stack configurations. Mechanical and chemical compatibility properties of fuel cell components were measured; they show that the baseline Ca-, Co-doped interconnect expands and weakens in hydrogen fuel. This and the failure to develop adequate sealants were the reason for performance shortfalls in large stacks. Small (1-in. footprint) two-cell stacks were fabricated which achieved good performance (average area-specific-resistance 1.0 ohm-cm{sup 2} per cell); however, larger stacks had stress-induced structural defects causing poor performance.

Not Available

1994-05-01T23:59:59.000Z

411

Power Plant Power Plant  

E-Print Network (OSTI)

Basin Center for Geothermal Energy at University of Nevada, Reno (UNR) 2 Nevada Geodetic LaboratoryStillwater Power Plant Wabuska Power Plant Casa Diablo Power Plant Glass Mountain Geothermal Area Lassen Geothermal Area Coso Hot Springs Power Plants Lake City Geothermal Area Thermo Geothermal Area

Tingley, Joseph V.

412

An Occupant-Based Dynamic Simulation Tool for Predicting Residential Power Demand and Quantifying the Impact of Residential Demand Response.  

E-Print Network (OSTI)

?? With their large impact on the power system and widespread distribution, residential loads provide vast resources that if utilized correctly have the potential to… (more)

Johnson, Brandon Jeffrey

2013-01-01T23:59:59.000Z

413

Reliable, Efficient and Cost-Effective Electric Power Converter for Small Wind Turbines Based on AC-link Technology  

SciTech Connect

Grid-tied inverter power electronics have been an Achilles heel of the small wind industry, providing opportunity for new technologies to provide lower costs, greater efficiency, and improved reliability. The small wind turbine market is also moving towards the 50-100kW size range. The unique AC-link power conversion technology provides efficiency, reliability, and power quality advantages over existing technologies, and Princeton Power will adapt prototype designs used for industrial asynchronous motor control to a 50kW small wind turbine design.

Darren Hammell; Mark Holveck; DOE Project Officer - Keith Bennett

2006-08-01T23:59:59.000Z

414

Investigation on the Benefits of Safety Margin Improvement in CANDU Nuclear Power Plant Using an FPGA-based Shutdown System.  

E-Print Network (OSTI)

??The relationship between response time and safety margin of CANadian Deuterium Uranium (CANDU) nuclear power plant (NPP) is investigated in this thesis. Implementation of safety… (more)

She, Jingke

2012-01-01T23:59:59.000Z

415

Power Factor Reactive Power  

E-Print Network (OSTI)

power: 130 watts Induction motor PSERC Incandescent lights 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0 power: 150 watts #12;Page 4 PSERC Incandescent Lights PSERC Induction motor with no load #12;Page 5 Incandescent Lights #12;Page 7 PSERC Incandescent lights power: Power = 118 V x 1.3 A = 153 W = 0.15 kW = power

416

Design & development fo a 20-MW flywheel-based frequency regulation power plant : a study for the DOE Energy Storage Systems program.  

SciTech Connect

This report describes the successful efforts of Beacon Power to design and develop a 20-MW frequency regulation power plant based solely on flywheels. Beacon's Smart Matrix (Flywheel) Systems regulation power plant, unlike coal or natural gas generators, will not burn fossil fuel or directly produce particulates or other air emissions and will have the ability to ramp up or down in a matter of seconds. The report describes how data from the scaled Beacon system, deployed in California and New York, proved that the flywheel-based systems provided faster responding regulation services in terms of cost-performance and environmental impact. Included in the report is a description of Beacon's design package for a generic, multi-MW flywheel-based regulation power plant that allows accurate bids from a design/build contractor and Beacon's recommendations for site requirements that would ensure the fastest possible construction. The paper concludes with a statement about Beacon's plans for a lower cost, modular-style substation based on the 20-MW design.

Rounds, Robert (Beacon Power, Tyngsboro, MA); Peek, Georgianne Huff

2009-01-01T23:59:59.000Z

417

Integrated All-silicon Thin-film Power Electronics on Flexible Sheets For Ubiquitous Wireless Charging Stations based on Solar-energy Harvesting  

E-Print Network (OSTI)

into wireless charging stations. In this work, we combine the thin-film circuits with flexible solar cellsIntegrated All-silicon Thin-film Power Electronics on Flexible Sheets For Ubiquitous Wireless Charging Stations based on Solar-energy Harvesting Liechao Huang, Warren Rieutort-Louis, Yingzhe Hu, Josue

418

Karnataka Power Corporation Limited and National Thermal Power Corporation  

Open Energy Info (EERE)

Karnataka Power Corporation Limited and National Thermal Power Corporation Karnataka Power Corporation Limited and National Thermal Power Corporation JV Jump to: navigation, search Name Karnataka Power Corporation Limited and National Thermal Power Corporation JV Place India Sector Wind energy Product India-based wind power project developer. References Karnataka Power Corporation Limited and National Thermal Power Corporation JV[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Karnataka Power Corporation Limited and National Thermal Power Corporation JV is a company located in India . References ↑ "Karnataka Power Corporation Limited and National Thermal Power Corporation JV" Retrieved from "http://en.openei.org/w/index.php?title=Karnataka_Power_Corporation_Limited_and_National_Thermal_Power_Corporation_JV&oldid=3479

419

Abstract--This paper proposes an optimization based method of planning reactive power control for electric transmission  

E-Print Network (OSTI)

Research under the Electric Power Networks Efficiency and Security (EPNES) program, award ECS0323734. H for electric transmission systems to endow them with the capability of being reconfigured to a secure. The modified New England 39-bus system and a North American power system with 6358 buses are adopted

Kumar, Ratnesh

420

Solution-Processed Organic Solar Cells with Power Conversion Efficiencies of 2.5% using Benzothiadiazole/Imide-Based Acceptors  

E-Print Network (OSTI)

Solution-Processed Organic Solar Cells with Power Conversion Efficiencies of 2.5% using achieved 0.1% power-conversion efficiency. KEYWORDS: organic electronics, solar cells, photovoltaic devices significantly different behav- iors in bulk heterojunction (BHJ) solar cells using poly(3-hexylthiophene) (P3HT

McGehee, Michael

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 53, NO. 2, APRIL 2006 477 Voltage-Source Active Power Filter Based on  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 53, NO. 2, APRIL 2006 477 Voltage-Source Active compensate load current harmonics, keeping better-quality sinusoidal currents from the source. The simulated MODERN power electronics have contributed a great deal to the development of new powerful applications

Catholic University of Chile (Universidad Católica de Chile)

422

A comprehensive power loss, efficiency, reliability and cost calculation of a 1 MW/500 kWh battery based energy storage system for frequency regulation application  

Science Journals Connector (OSTI)

Abstract Battery based energy storage system (ESS) has tremendous diversity of application with an intense focus on frequency regulation market. An ESS typically comprised of a battery and a power conversion system. A calculation of performance parameters is performed in this research. The aim is to formulate an in-depth analysis of the ESS in terms of power losses of the semiconductor and electrical devices, efficiency, reliability and cost which would foster various research groups and industries around the globe to improve their future product. In view of this, a relation between the operating conditions and power losses is established to evaluate the efficiency of the system. The power loss calculation presented in this paper has taken into account the conduction and switching losses of the semiconductor devices. Afterwards, the Arrhenius Life Stress relation is adopted to calculate the reliability of the system by considering temperature as a covariate. And finally, a cost calculation is executed and presented as a percentage of total cost of the ESS. It has been found that the power loss and efficiency of the ESS at rated power is 146 kW and 85% respectively. Furthermore, the mean time between failures of the ESS is 8 years and reliability remains at 73% after a year. The major cost impact observed is for battery and PCS as 58% and 16% respectively. Finally, it has been determined that further research is necessary for higher efficient and lower cost system for high penetration of energy storage system in the market.

Md Arifujjaman

2015-01-01T23:59:59.000Z

423

Dynamic power systems for power generation  

SciTech Connect

The characteristics of dynamic power systems have considerable potential value, especially for the space station. The base of technology that makes these dynamic power systems practical is reviewed. The following types of power-generating systems are examined herein: organic Rankine cycle, potassium Rankine cycle, Brayton cycle, and Stirling cycle.

English, R.E.

1984-04-01T23:59:59.000Z

424

Brookfield Renewable Power Corp formerly Brascan Power Corp ...  

Open Energy Info (EERE)

Sector: Hydro, Wind energy Product: Toronto-based owner, operator and developer of hydroelectric power facilities, co-generation and wind power assets. Coordinates: 43.64856,...

425

Improved power efficiency in blue phosphorescent organic light-emitting diodes using diphenylmethyl linkage based high triplet energy hole transport materials  

Science Journals Connector (OSTI)

Improved power efficiency in blue phosphorescent organic light-emitting diodes (PHOLEDs) was demonstrated by using new high triplet energy hole-transport materials based on the diphenylmethyl linkage. Two high triplet energy hole-transport materials with diphenylamine or ditolyamine moieties linked through a diphenylmethyl linkage, 4,4?-(diphenylmethylene)bis(N,N-diphenylaniline) (TCBPA) and 4,4?-(diphenylmethylene)bis(N,N-di-p-tolylaniline), were synthesized and evaluated as hole-transport materials for blue PHOLEDs. The power efficiency of TCBPA was superior to that of standard 1,1-bis[4-[N,N?-di(p-tolyl)amino]phenyl]cyclohexane.

Chil Won Lee; Jun Yeob Lee

2013-01-01T23:59:59.000Z

426

Venco Power | Open Energy Information  

Open Energy Info (EERE)

Venco Power Jump to: navigation, search Name: Venco Power Place: Germany Zip: 95182 Sector: Renewable Energy, Wind energy Product: Germany-based firm engaged in the design,...

427

Spanish Power | Open Energy Information  

Open Energy Info (EERE)

Power Jump to: navigation, search Name: Spanish Power Place: Madrid, Spain Zip: 28014 Sector: Solar, Wind energy Product: Madrid-based electricity producer and distributor active...

428

Environmental assessment of German electricity generation from coal-fired power plants with amine-based carbon capture  

Science Journals Connector (OSTI)

One of the most important sources of global carbon dioxide emissions is the combustion of fossil...2 emissions. Therefore, the increased requirements for climate protection are a great challenge for the power pro...

Andrea Schreiber; Petra Zapp…

2009-09-01T23:59:59.000Z

429

Modeling and controller synthesis for the cascaded H-bridge multilevel active power filter with ADALINE-based identifiers  

Science Journals Connector (OSTI)

This paper presents the averaged state-space modeling and controller synthesis methodology for the cascaded H-bridge multilevel active power filters (CHB-APFs). ... compensation and dc-link stabilization among th...

Yang Han; Lin Xu; Muhammad Mansoor Khan; Chen Chen

2011-06-01T23:59:59.000Z

430

Thermodynamic Modeling and Analysis of the Ratio of Heat to Power Based on a Conceptual CHP System  

E-Print Network (OSTI)

The CHP system not only produces electrical energy, but also produces thermal energy. An extensive analysis of the CHP market reveals that one of the most important engineering characteristics is flexibility. A variable heat-to-power ratio has...

Liu, Z.; Li, X.; Liu, Z.

2006-01-01T23:59:59.000Z

431

A Study on Fault Analysis of Wind Power (DFIG) in Distribution Systems Based on the PSCAD/EMTDC  

Science Journals Connector (OSTI)

Korean government (Ministry of Knowledge Economy) has estimated that the rate of wind power (WP) in the new energy sources will be occupied by 37% in 2020 and 42% in 2030, and also green energies such as photo...

Jintaek Jeon; Joonho Son; Munseok Lee; Munkbaht…

2011-01-01T23:59:59.000Z

432

Optimal tuning of PI controller using PSO optimization for indirect power control for DFIG based wind turbine with MPPT  

Science Journals Connector (OSTI)

In this paper, an artificial intelligence method particle swarm optimization (PSO) algorithm is presented for determining the optimal PI controller parameters for the indirect control active and reactive power of...

Youcef Bekakra; Djilani Ben Attous

2014-09-01T23:59:59.000Z

433

Performance improvement of combined cycle power plant based on the optimization of the bottom cycle and heat recuperation  

Science Journals Connector (OSTI)

Many F class gas turbine combined cycle (GTCC) power plants are built in ... the efficiency improvement of GTCC plant. A combined cycle with three-pressure reheat heat recovery steam ... HRSG inlet gas temperatur...

Wenguo Xiang; Yingying Chen

2007-03-01T23:59:59.000Z

434

Minimum Cost Operation Mode and Minimum Loss Operation Mode of Power System – Operation Mode Selection Based on Voltage Stability  

Science Journals Connector (OSTI)

Two formulae – an optimal P-Q generation formula for minimum system cost and an optimal MW allocation formula for minimum system loss – are described in this paper. The author defines two kinds of power system operation

Sang-Joong Lee

2006-01-01T23:59:59.000Z

435

SI-APRENDE: An Intelligent Learning System Based on SCORM Learning Objects for Training Power Systems Operators  

Science Journals Connector (OSTI)

This paper presents the architecture of the Intelligent Learning Systems for training of power systems operators and describes one of its components: the tutor module. Operators can acquire knowledge in differ...

Liliana Argotte; G. Arroyo-Figueroa…

2011-01-01T23:59:59.000Z

436

Enex Power Germany | Open Energy Information  

Open Energy Info (EERE)

Enex Power Germany Jump to: navigation, search Name: Enex Power Germany Place: Geretsried, Germany Sector: Geothermal energy Product: Germany-based subsidiary of Enex Power,...

437

Vulcan Power Company | Open Energy Information  

Open Energy Info (EERE)

Power Company Place: Bend, Oregon Zip: 97702 Sector: Geothermal energy Product: Oregon-based geothermal power plant developer active in California. References: Vulcan Power...

438

Crionaig Power Limited | Open Energy Information  

Open Energy Info (EERE)

Crionaig Power Limited Jump to: navigation, search Name: Crionaig Power Limited Place: United Kingdom Sector: Wind energy Product: Edinburgh-based power company developing wind...

439

Small capacity absorption systems for cooling and power with a scroll expander and ammonia based working fluids  

Science Journals Connector (OSTI)

Abstract Up to now, the use of ammonia/water absorption cycles has been mainly limited to the production of refrigeration or air conditioning but due to the relatively high generator pressure some authors have proposed the integration in parallel of an expander to produce cooling and power simultaneously. This feature could provide many benefits in the future such as the use of solar thermal energy to partially cover the heating, cooling and electricity demand of a building. In the other hand the life cycle cost of the absorption system is improved because of the increase in the number of running hours in periods in which there is no demand for cooling but the demand for electrical power is still important. This paper shows a new combined absorption system using a scroll expander and three different working fluids using ammonia as refrigerant: ammonia/water, ammonia/lithium nitrate and ammonia/sodium thiocyanate. The scroll expander performance maps were obtained experimentally and modeled to predict the power production, rotational speed and exhaust temperature of the expander and included in the complete absorption cycle model build using Engineering Equation Solver (EES) Software. This system produces different amounts of cooling and power at the desired power/cooling ratio to cover varying demand profiles.

Luis Carlos Mendoza; Dereje S. Ayou; Joaquín Navarro-Esbrí; Joan Carles Bruno; Alberto Coronas

2014-01-01T23:59:59.000Z

440

A Stator-Voltage Decoupling Control Strategy for DFIG-based Wind Power Turbine Supplying Local Isolated Load  

Science Journals Connector (OSTI)

The performance of doubly fed induction generator (DFIG) based wind turbines supplying local isolated load is manly up to the stator-voltage control strategy. Compared with conventional steady mathematic model based one, a dynamic mathematic model based ... Keywords: dynamic model, supplying local isolated load, decoupling stator-voltage control, DFIG-based wind turbine

Long Zhan; Shuying Yang; Hui Gao

2012-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

ELECTRIFICATION OF ISOLATED AREAS BY INTERCONNECTING DIFFERENT RENEWABLE SOURCES OF ENERGY: A SUSTANAIBLE APPROACH  

E-Print Network (OSTI)

of a methodology for rural electrification by micro-grids based upon different renewable resources. > ApplicationELECTRIFICATION OF ISOLATED AREAS BY INTERCONNECTING DIFFERENT RENEWABLE SOURCES OF ENERGY to absorb innovations such as rural electrification by isolated micro grid Sustainable approach The success

442

Bench-scale Development of an Advanced Solid sorbent-based CO2 Capture Process for Coal-fired Power Plalnts  

NLE Websites -- All DOE Office Websites (Extended Search)

scale Development of an scale Development of an Advanced Solid Sorbent-based CO 2 Capture Process for Coal-fired Power Plants Background The mission of the U.S. Department of Energy/National Energy Technology Laboratory (DOE/NETL) Existing Plants, Emissions, & Capture (EPEC) Research & Development (R&D) Program is to develop innovative environmental control technologies to enable full use of the nation's vast coal reserves, while at the same time allowing the current

443

An ambipolar phosphine oxide-based host for high power efficiency blue phosphorescent organic light emitting devices  

SciTech Connect

We report blue electrophosphorescent organic light emitting devices (OLEDs) with a new ambipolar host material, 4-(diphenylphosphoryl)-N,N-diphenylaniline (HM-A1), doped with the blue phosphor iridium (III) bis[(4,6-difluorophenyl)-pyridinato-N,C2’]picolinate (FIrpic). The ambipolar nature of the host was verified using single carrier devices. The power efficiency of devices that employed 2,8-bis(diphenylphosphoryl)dibenzothiophene (PO15) as the electron transport layer showed optimized device performance when the electron transport layer thickness was 500 Å, giving a peak power efficiency of 46 lm/W (corresponding external quantum efficiency of 17.1%). The external quantum efficiency and power efficiency at the brightness of 800 Cd/m2 were measured with no light outcoupling enhancement and found to be 15.4% and 26 lm/W, respectively.

Polikarpov, Evgueni; Swensen, James S.; Chopra, Neetu; So, Franky; Padmaperuma, Asanga B.

2009-06-01T23:59:59.000Z

444

Optimal power management and powertrain components sizing of fuel cell/battery hybrid electric vehicles based on particle swarm optimisation  

Science Journals Connector (OSTI)

Combining a Fuel Cell (FC), as primary power source, with a Battery Energy System (BES), as an auxiliary source, for high power demands is a promising approach for future hybrid electric vehicles (HEV). The powertrain control strategy and the component sizing significantly affect the vehicle performance, cost, vehicle efficiency and fuel economy. This paper presents a developed control strategy for optimising the power sharing between sources and components sizing by using Particle Swarm Optimisation (PSO) algorithm. This control strategy implemented on FC/Battery hybrid electric vehicle in order to achieve the best performance with minimum fuel consumption and minimum powertrain components sizing for a given driving cycle with high efficiency. The powertrain and the proposed control strategy have been simulated by Matlab/Simulink. The simulation results have demonstrated that the optimal sizing of the powertrain of FC/battery components and the minimum fuel consumption have been improved by applying the PSO control strategy.

Omar Hegazy; Joeri Van Mierlo

2012-01-01T23:59:59.000Z

445

Power network analysis and optimization  

E-Print Network (OSTI)

and J. N. Kozhaya, “Fast power grid simulation,” in Proc.C. Chen, “Efficient large-scale power grid analysis based onare connected between power grid nodes and the ground. Time-

Zhang, Wanping

2009-01-01T23:59:59.000Z

446

Progressive network-flow based power-aware broadcast addressing for pin-constrained digital microfluidic biochips  

Science Journals Connector (OSTI)

In recent emerging marketplace, designs for pin-constrained digital microfluidic biochips (PDMFBs) have received much attention due to the large impact on packaging and product cost. One of the major approaches, broadcast addressing, reduces the ... Keywords: digital microfluidics, electrode addressing, power

Tsung-Wei Huang; Hong-Yan Su; Tsung-Yi Ho

2011-06-01T23:59:59.000Z

447

Wavelet-based multi-resolution analysis and artificial neural networks for forecasting temperature and thermal power consumption  

E-Print Network (OSTI)

the functioning of a multi-energy district boiler (La Rochelle, west coast of France), adding to the plant. Substituting the prediction task of an original time series of high variability by the estimation of its, outdoor temperature, thermal power consumption, hot water distribution network, district boiler. 1

Boyer, Edmond

448

A Bandwidth-Based Power-Aware Routing Protocol with Low Route Discovery Overhead in Mobile Ad hoc Networks  

Science Journals Connector (OSTI)

......protocol, where the power consumed by listening to the transmission of a packet is represented...equipped with the IEEE 802.11b wireless device. Measuring the distance-to-bandwidth...equipped with the IEEE 802.11b wireless device. However, if a specific distance is......

Chuan-Chi Weng; Ching-Wen Chen; Chang-Jung Ku; Shiow-Fen Hwang

2010-09-01T23:59:59.000Z

449

4968 IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 28, NO. 4, NOVEMBER 2013 Optimized FTR Portfolio Construction Based on the  

E-Print Network (OSTI)

markets, since it may restrict the amounts of some transactions and not allow others to take place4968 IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 28, NO. 4, NOVEMBER 2013 Optimized FTR Portfolio rights (FTR) or congestion revenue rights portfolio for an FTR market participant given his as- sessment

Gross, George

450

An Accelerated Aging Analysis Method Based on Local Data for Components and Materials in Nuclear Power Plants  

Science Journals Connector (OSTI)

In nuclear power plants, accelerated aging of certain components can lead to reduction of their service life, which has potential impact on the safety and economics of the whole plant. In order to effectively manage the accelerated aging of critical ... Keywords: accelerated aging, life estimation, accelerating factor, performance degradation data

Zeng Yuyun; Liu Jingquan; Huang Weigang

2013-07-01T23:59:59.000Z

451

Technical-economic evaluation of O2/CO2 recycle combustion power plant based on life-cycle  

Science Journals Connector (OSTI)

In this study, a detailed technical-economic analysis on a O2/CO2 recycle combustion power plant (Oxy-combustion plant) retrofitted from the existing coal-fired plant (with a capacity of 2×300...2 emissions, inve...

Yun Wang; YongChun Zhao; JunYing Zhang…

2010-12-01T23:59:59.000Z

452

A Pin Power Reconstruction Method for CANDU Reactor Cores Based on Coarse-Mesh Finite Difference Calculations  

SciTech Connect

A reconstruction method has been developed for recovering pin powers from Canada deuterium uranium (CANDU) reactor core calculations performed with a coarse-mesh finite difference diffusion approximation and single-assembly lattice calculations. The homogeneous intranodal distributions of group fluxes are efficiently computed using polynomial shapes constrained to satisfy the nodal information approximated from the node-average fluxes. The group fluxes of individual fuel pins in a heterogeneous fuel bundle are determined using these homogeneous intranodal flux distributions and the form functions obtained from the single-assembly lattice calculations. The pin powers are obtained using these pin fluxes and the pin power cross sections generated by the single-assembly lattice calculation. The accuracy of the reconstruction schemes has been estimated by performing benchmark calculations for partial core representation of a natural uranium CANDU reactor. The results indicate that the reconstruction schemes are quite accurate, yielding maximum pin power errors of less than {approx}3%. The main contribution to the reconstruction error is made by the errors in the node-average fluxes obtained from the coarse-mesh finite difference diffusion calculation; the errors due to the reconstruction schemes are <1%.

Lee, Hyung-Seok [Chosun University (Korea, Republic of); Yang, Won Sik [Chosun University (Korea, Republic of); Na, Man Gyun [Chosun University (Korea, Republic of); Choi, Hangbok [Korea Atomic Energy Research Institute (Korea, Republic of)

2000-04-15T23:59:59.000Z

453

Electric Power Generation Systems | netl.doe.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

and Data Baseline Studies Quality Guidelines (QGESS) About Energy Analysis Coal gasification-based power plants Coal combustion-based power plants Natural gas-fueled power...

454

SaskPower Small Power Producers Program (Saskatchewan, Canada) | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SaskPower Small Power Producers Program (Saskatchewan, Canada) SaskPower Small Power Producers Program (Saskatchewan, Canada) SaskPower Small Power Producers Program (Saskatchewan, Canada) < Back Eligibility Commercial Agricultural Industrial Residential Savings Category Solar Buying & Making Electricity Program Info Funding Source SaskPower State Saskatchewan Program Type Performance-Based Incentive Provider SaskPower The Small Power Producers Program accommodates customers who wish to generate up to 100 kilowatts (kW) of electricity for the purpose of offsetting power that would otherwise be purchased from SaskPower or for selling all of the power generated to SaskPower. At the beginning of the application process, you need to choose between one of two options: Sell all of the power you produce to SaskPower, or sell the

455

Novel fuzzy logic based sensorless maximum power point tracking strategy for wind turbine systems driven DFIG (doubly-fed induction generator)  

Science Journals Connector (OSTI)

Abstract This paper presents a novel FLC MPPT (fuzzy logic sensorless maximum power point tracking) method for WECS (wind energy conversion systems). The proposed method greatly reduces the speed variation range of the wind generator which leads to the downsizing the PWM (pulse width modulation) back-to-back converters by approximately 40% in comparison with conventional techniques. The method also increases the system's reliability by reducing the converter losses. Firstly, a MRAS (model reference adaptive system) based on fuzzy logic technique is used to estimate the DFIG (doubly-fed induction generator) rotor's speed. Then, a FLC MPPT (Fuzzy Logic Maximum Power Point Tracking) method is applied to provide the reference electromagnetic torque. Subsequently, in order to achieve the overall sensorless MPPT technique, the wind power is approximated from estimated generator speed and the reference of electromagnetic torque. Finally, the wind speed is estimated from the mechanical power using a fuzzy logic technique. The proposed control method has been applied to a WTG (wind turbine generator) driving a 3.7 kW DFIG in variable speed mode. In order to validate the simulation results, experimental tests have been performed on a 3.7 kW test bench, consisting of a DFIG and DC motor drive.

K. Belmokhtar; M.L. Doumbia; K. Agbossou

2014-01-01T23:59:59.000Z

456

Techno-economic assessment of substituting natural gas based heater with thermal energy storage system in parabolic trough concentrated solar power plant  

Science Journals Connector (OSTI)

Abstract Parabolic-trough (PT) concentrated solar power (CSP) plants are very vulnerable to daily fluctuations in solar radiation. This dependence can be mitigated through a hybridization of solar energy with natural gas based heaters that supply thermal energy during the night or whenever solar irradiance level is dimmed. However, there is more sustainable way for CSP plants to avoid power-generation-outages caused by transient weather conditions, i.e. installation of thermal energy storage (TES). Such a system stores surplus thermal energy provided by solar field during sunny hours and discharges it when the sun is not available. Shams-1 PT plant in Madinat-Zayed, United-Arab-Emirates (UAE) has two natural gas based components, i.e. steam-booster heater and heat transfer fluid (HTF) heater. In the current study, model of Shams-1 was developed and analyzed in the System Advisor Model (SAM) software. It has been attempted to replace the HTF heater with TES. A parametric study has been conducted to determine the size of the TES as well as the solar field such that the specified power target demand would be satisfied. The results of the parametric analysis showed that TES can't completely replace the HTF heater, within reasonable sizes. Nevertheless, consequent simulations depicts that TES increases the capacity factor on one hand and decreases fuel consumption on the other hand.

V. Poghosyan; Mohamed I. Hassan

2015-01-01T23:59:59.000Z

457

Application of EPRI risk-based inservice inspection procedure to combustion engineering design of nuclear power plant  

SciTech Connect

The EPRI developed risk-based inservice inspection procedure is used to select the elements for inservice inspection on a section of the high pressure safety injection system of the Entergy Operations ANO2 nuclear plant. This plant is the pilot plant in a six utility-eleven plant EPRI tailored collaboration program to apply the general EPRI procedures to Combustion Engineering NSSS designs. The procedure results in a reduction of candidate inspection locations from 14, based on current ASME Section XI rules for B-J welds to 3, based on the risk-based selection criteria.

Lubin, B.T. [ABB Combustion Engineering, Windsor, CT (United States). Nuclear Operations; Fourgerousse, R. [Entergy Operations-ANO2, Russellville, AR (United States)

1996-12-01T23:59:59.000Z

458

Power beaming providing a space power infrastructure  

SciTech Connect

This study, based on two levels of technology, applies the power beaming concept to four planned satellite constellations. The analysis shows that with currently available technology, power beaming can provide mass savings to constellations in orbits ranging from low earth orbit to geosynchronous orbit. Two constellations, space surveillance and tracking system and space based radar, can be supported with current technology. The other two constellations, space-based laser array and boost surveillance and tracking system, will require power and transmission system improvements before their breakeven specific mass is achieved. A doubling of SP-100 conversion efficiency from 10 to 20/% would meet or exceed breakeven for these constellations.

Bamberger, J.A.; Coomes, E.P.

1992-08-01T23:59:59.000Z

459

Evaluation of the Emission, Transport, and Deposition of Mercury, Arsenic, and Fine Particulate Matter From Coal-Based Power Plants in the Ohio River Valley  

NLE Websites -- All DOE Office Websites (Extended Search)

Kevin crist Kevin crist Principal Investigator Ohio University Research and Technology Center Athens, OH 45701 740-593-4751 cristk@ohiou.edu Environmental and Water Resources Evaluation of thE Emission, transport, and dEposition of mErcury, arsEnic, and finE particulatE mattEr from coal-BasEd powEr plants in thE ohio rivEr vallEy rEgion Background The U.S. Department of Energy's National Energy Technology Laboratory (NETL) has established an aggressive research initiative to address the technical and scientific issues surrounding the impact of coal-based power systems on ambient levels of fine particulate matter (PM 2.5 ), nitrogen oxides (NO X ), mercury/air toxics, and acid gases. Regulatory drivers such as the 1990 Clean Air Act Amendments, the 1997 revised National Ambient Air Quality Standards, and the 2005 Clean Air

460

Demonstration of a Novel Synchrophasor-based Situational Awareness System: Wide Area Power System Visualization, On-line Event Replay and Early Warning of Grid Problems  

SciTech Connect

Since the large North Eastern power system blackout on August 14, 2003, U.S. electric utilities have spent lot of effort on preventing power system cascading outages. Two of the main causes of the August 14, 2003 blackout were inadequate situational awareness and inadequate operator training In addition to the enhancements of the infrastructure of the interconnected power systems, more research and development of advanced power system applications are required for improving the wide-area security monitoring, operation and planning in order to prevent large- scale cascading outages of interconnected power systems. It is critically important for improving the wide-area situation awareness of the operators or operational engineers and regional reliability coordinators of large interconnected systems. With the installation of large number of phasor measurement units (PMU) and the related communication infrastructure, it will be possible to improve the operators’ situation awareness and to quickly identify the sequence of events during a large system disturbance for the post-event analysis using the real-time or historical synchrophasor data. The purpose of this project was to develop and demonstrate a novel synchrophasor-based comprehensive situational awareness system for control centers of power transmission systems. The developed system named WASA (Wide Area Situation Awareness) is intended to improve situational awareness at control centers of the power system operators and regional reliability coordinators. It consists of following main software modules: • Wide-area visualizations of real-time frequency, voltage, and phase angle measurements and their contour displays for security monitoring. • Online detection and location of a major event (location, time, size, and type, such as generator or line outage). • Near-real-time event replay (in seconds) after a major event occurs. • Early warning of potential wide-area stability problems. The system has been deployed and demonstrated at the Tennessee Valley Authority (TVA) and ISO New England system using real-time synchrophasor data from openPDC. Apart from the software product, the outcome of this project consists of a set of technical reports and papers describing the mathematical foundations and computational approaches of different tools and modules, implementation issues and considerations, lessons learned, and the results of lidation processes.

Rosso, A.

2012-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Preliminary design report of a relativistic-Klystron two-beam-accelerator based power source for a 1 TeV center-of-mass next linear collider  

SciTech Connect

A preliminary point design for an 11.4 GHz power source for a 1 TeV center-of-mass Next Linear Collider (NLC) based on the Relativistic-Klystron Two-Beam-Accelerator (RK-TBA) concept is presented. The present report is the result of a joint LBL-LLNL systems study. consisting of three major thrust areas: physics, engineering, and costing. The new RK-TBA point design, together with our findings in each of these areas, are reported.

Yu, S.; Goffeney, N.; Henestroza, E. [Lawrence Berkeley Lab., CA (United States)] [and others

1995-02-22T23:59:59.000Z

462

Fuel Cell Power Model Version 2: Startup Guide, System Designs, and Case Studies. Modeling Electricity, Heat, and Hydrogen Generation from Fuel Cell-Based Distributed Energy Systems  

SciTech Connect

This guide helps users get started with the U.S. Department of Energy/National Renewable Energy Laboratory Fuel Cell Power (FCPower) Model Version 2, which is a Microsoft Excel workbook that analyzes the technical and economic aspects of high-temperature fuel cell-based distributed energy systems with the aim of providing consistent, transparent, comparable results. This type of energy system would provide onsite-generated heat and electricity to large end users such as hospitals and office complexes. The hydrogen produced could be used for fueling vehicles or stored for later conversion to electricity.

Steward, D.; Penev, M.; Saur, G.; Becker, W.; Zuboy, J.

2013-06-01T23:59:59.000Z

463

Comparative Analysis of Alternative Configurations of the Mercury 50 Recuperated Gas-Turbine-Based Biomass Integrated Gasification Combined Heat and Power (BIGCHP) Plant  

Science Journals Connector (OSTI)

In this paper, several original configurations of the cogeneration system based on different gasification technologies and Mercury 50 recuperated gas turbine are proposed and examined theoretically. ... (14) Another key problem of the successful commercialization of the technology is the commercial availability of reliable and efficient gas turbines (GTs) modified for syngas operation. ... In particular, the paper presents current development status and design challenges being addressed by Siemens Westinghouse Power Corp. for large industrial engines (>200 MW) and by Solar Turbines for smaller engines (Turbine Systems (ATS) program. ...

Jacek Kalina

2011-11-29T23:59:59.000Z

464

Proceedings of the 2007 IEEE 10th International Conference on Rehabilitation Robotics, June 12-15, Noordwijk, The Netherlands Decomposition-Based Control for a Powered Knee and Ankle  

E-Print Network (OSTI)

-15, Noordwijk, The Netherlands Decomposition-Based Control for a Powered Knee and Ankle Transfemoral Prosthesis to energetically passive devices. The knee and ankle joints of the native limb, however, generate significant net, the authors have developed a prototype of a powered knee and ankle transfemoral prosthesis, as described

465

Transient Signal Analysis is a digital device testing method that is based on the analysis of volt-age transients at multiple test points. In this paper, the power supply transient signals from sim-  

E-Print Network (OSTI)

in 8-bit Multiplier Simulation Experiments Investigating the Use of Power Supply Transient SigAbstract Transient Signal Analysis is a digital device testing method that is based on the analysis of volt- age transients at multiple test points. In this paper, the power supply transient signals from

Plusquellic, James

466

Green Power Network: Green Power Markets Overview  

NLE Websites -- All DOE Office Websites (Extended Search)

Green Markets Green Markets Search Search Help More Search Options Search Site Map News TVA Seeks 126 MW of Renewables in 2014 December 2013 More News More News Subscribe to E-Mail Update Subscribe to e-mail update Events EPA Webinar - The Power of Aggregated Purchasing: How to Green Your Electricity Supply & Save Money January 15, 2014 1:00-2:00 p.m. ET Previous Webinars More News Features Green Power Market Status Report (2011 Data) Featured Green Power Reports Green Pricing Green Power Marketing Green Certificates Carbon Offsets State Policies Overview The essence of green power marketing is to provide market-based choices for electricity consumers to purchase power from environmentally preferred sources. The term "green power" is used to define power generated from renewable energy sources, such as wind and solar power, geothermal, hydropower and various forms of biomass. Green power marketing has the potential to expand domestic markets for renewable energy technologies by fostering greater availability of renewable electric service options in retail markets. Although renewable energy development has traditionally been limited by cost considerations, customer choice allows consumer preferences for cleaner energy sources to be reflected in market transactions. In survey after survey, customers have expressed a preference and willingness to pay more, if necessary, for cleaner energy sources. You can find more information about purchase options on our "Buying Green Power" page.

467

Open-cycle magnetohydrodynamic power plant based upon direct-contact closed-loop high-temperature heat exchanger  

DOE Patents (OSTI)

A magnetohydrodynamic (MHD) power generating system in which ionized combustion gases with slag and seed are discharged from an MHD combustor and pressurized high temperature inlet air is introduced into the combustor for supporting fuel combustion at high temperatures necessary to ionize the combustion gases, and including a heat exchanger in the form of a continuous loop with a circulating heat transfer liquid such as copper oxide. The heat exchanger has an upper horizontal channel for providing direct contact between the heat transfer liquid and the combustion gases to cool the gases and condense the slag which thereupon floats on the heat transfer liquid and can be removed from the channel, and a lower horizontal channel for providing direct contact between the heat transfer liquid and pressurized air for preheating the inlet air. The system further includes a seed separator downstream of the heat exchanger.

Berry, Gregory F. (Naperville, IL); Minkov, Vladimir (Skokie, IL); Petrick, Michael (Joliet, IL)

1988-01-01T23:59:59.000Z

468

Projections of U. S. GHG Reductions from Nuclear Power New Capacity Based on Historic Levels of Investment  

SciTech Connect

Historical rates of capital investment in nuclear plant construction was used as a guide to estimate the rate of future capacity introduction. The magnitude of nuclear capacity was then used to determine the effect on greenhouse gas (GHG) emissions from electrical production in the U.S. to 2050. Total capital investment in nuclear power plant construction for every U.S. nuclear unit from 1964 to 1990 were obtained and the total investment and divided by their construction period to provide a value for possible rate of investment. The total linear rate of capital expenditure over the entire period was determined as well as that for the period of peak construction from 1973 to 1985, $11.5 billion/y and $17.9 billion/y, respectively in 2004$. These were used with a variety of capital cost estimates for nuclear construction to obtain several scenarios for nuclear capacity additions. Total nuclear generation out to 2050 was calculated assuming current plants would be constrained by 60-year operating licenses (i.e., a single 20-year life extension). The effect on nuclear generating capacity was projected and the resultant impact on GHG emissions determined assuming nuclear would directly replace coal-fired generation. It was concluded that actually reductions in emissions would not be experienced until 2038, yet growth in emissions from electrical production would be slowed up through that point. Nuclear energy, therefore cannot have a dramatic short-term effect on emissions, as likely cannot any energy producing technology due to the significant time to introduce large-scale changes. Nuclear power, however, can have a major longer term impact on emissions, particularly under more favorable cost and investment conditions.

Besmann, Theodore M [ORNL

2010-01-01T23:59:59.000Z

469

A fuzzy-based reliability approach to evaluate basic events of fault tree analysis for nuclear power plant probabilistic safety assessment  

Science Journals Connector (OSTI)

Abstract Fault tree analysis has been widely utilized as a tool for nuclear power plant probabilistic safety assessment. This analysis can be completed only if all basic events of the system fault tree have their quantitative failure rates or failure probabilities. However, it is difficult to obtain those failure data due to insufficient data, environment changing or new components. This study proposes a fuzzy-based reliability approach to evaluate basic events of system fault trees whose failure precise probability distributions of their lifetime to failures are not available. It applies the concept of failure possibilities to qualitatively evaluate basic events and the concept of fuzzy sets to quantitatively represent the corresponding failure possibilities. To demonstrate the feasibility and the effectiveness of the proposed approach, the actual basic event failure probabilities collected from the operational experiences of the David–Besse design of the Babcock and Wilcox reactor protection system fault tree are used to benchmark the failure probabilities generated by the proposed approach. The results confirm that the proposed fuzzy-based reliability approach arises as a suitable alternative for the conventional probabilistic reliability approach when basic events do not have the corresponding quantitative historical failure data for determining their reliability characteristics. Hence, it overcomes the limitation of the conventional fault tree analysis for nuclear power plant probabilistic safety assessment.

Julwan Hendry Purba

2014-01-01T23:59:59.000Z

470

Power and Energy also called Power Energy | Open Energy Information  

Open Energy Info (EERE)

also called Power Energy also called Power Energy Jump to: navigation, search Name Power and Energy (also called Power+Energy) Place Bucks Country, Pennsylvania Sector Hydro, Hydrogen Product Power+Energy develops micro-channel hydrogen purifiers, hydrogen separators, and fuel processing technology. The company has signed development deals with the US Navy and has received USD 2.3m from the Defense Department for its research. References Power and Energy (also called Power+Energy)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Power and Energy (also called Power+Energy) is a company located in Bucks Country, Pennsylvania . References ↑ "Power and Energy (also called Power+Energy)"

471

Experience in operating and upgrading the No. 5 unit of the Novovoronezh nuclear power plant – practical base for developing a reliable source of nuclear energy  

Science Journals Connector (OSTI)

The No. 5 unit of the Novovoronezh nuclear power plant, starting commercial operations on September 26, 1980, is the first power-generating unit with a 1000 MW VVER in our country. The assimilation of its power g...

I. L. Vitkovskii

2011-03-01T23:59:59.000Z

472

Distributed simulation in manufacturing: EPOCHS: integrated commercial off-the-shelf software for agent-based electric power and communication simulation  

Science Journals Connector (OSTI)

This paper reports on the development of the Electric Power and Communication Synchronizing Simulator (EPOCHS), a distributed simulation environment. Existing electric power simulation tools accurately model power systems of the past, which were controlled ...

Kenneth M. Hopkinson; Kenneth P. Birman; Renan Giovanini; Denis V. Coury; Xiaoru Wang; James S. Thorp

2003-12-01T23:59:59.000Z

473

System level design of power distribution network for mobile computing platforms  

E-Print Network (OSTI)

Regulator based Power Distribution Design under WorstRegulator based Power Distribution Design under WorstRegulator based Power Distribution Design under Worst

Shayan Arani, Amirali

2011-01-01T23:59:59.000Z

474

General formula for the thermoelectric transport phenomena based on Fermi liquid theory: Thermoelectric power, Nernst coefficient, and thermal conductivity  

Science Journals Connector (OSTI)

On the basis of linear response transport theory, the general expressions for the thermoelectric transport coefficients, such as thermoelectric power (S), Nernst coefficient (?), and thermal conductivity (?), are derived by using Fermi liquid theory. The obtained expression is exact for the most singular term in terms of 1/?k* (?k* being the quasiparticle damping rate). We utilize Ward identities for the heat velocity which is derived by the local energy conservation law. The derived expressions enable us to calculate various thermoelectric transport coefficients in a systematic way, within the framework of the conserving approximation of Baym and Kadanoff. Thus the present expressions are very useful for studying strongly correlated electrons such as high-Tc superconductors, organic metals, and heavy fermion systems, where the current vertex correction (VC) is expected to play important roles. By using the derived expression, we calculate the thermal conductivity ? in a free-dispersion model up to second order with respect to the on-site Coulomb potential U. We find that it is slightly enhanced due to the VC for the heat current, although the VC for electron current makes the conductivity (?) of this system diverge, reflecting the absence of the umklapp process.

Hiroshi Kontani

2003-01-16T23:59:59.000Z

475

Power module assembly  

DOE Patents (OSTI)

A power module assembly of the type suitable for deployment in a vehicular power inverter, wherein the power inverter has a grounded chassis, is provided. The power module assembly comprises a conductive base layer electrically coupled to the chassis, an insulating layer disposed on the conductive base layer, a first conductive node disposed on the insulating layer, a second conductive node disposed on the insulating layer, wherein the first and second conductive nodes are electrically isolated from each other. The power module assembly also comprises a first capacitor having a first electrode electrically connected to the conductive base layer, and a second electrode electrically connected to the first conductive node, and further comprises a second capacitor having a first electrode electrically connected to the conductive base layer, and a second electrode electrically connected to the second conductive node.

Campbell, Jeremy B. (Torrance, CA); Newson, Steve (Redondo Beach, CA)

2011-11-15T23:59:59.000Z

476

High power  

Science Journals Connector (OSTI)

... 1970s technomanic projects such as nuclear power stations were still in vogue. Environmentalists argued that solar power seemed a far safer, cheaper and reassuringly low-tech power source. The technomaniacs ... tech power source. The technomaniacs, fearing that they were losingthis argument, sought to hijack solar power themselves. They proposed an enormously expensive and complicated ...

David Jones

1994-03-03T23:59:59.000Z

477

Power Marketing  

NLE Websites -- All DOE Office Websites (Extended Search)

UGPS' Marketing Service Area Power Marketing As a marketer of Federal power in the Upper Great Plains Region, the Power Marketing staff provides a variety of services for customers...

478

Microsoft PowerPoint - NEAC on Science Based Fuel Cycle R&D.PPT [Compatibility Mode]  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Advanced Advanced Fuel Cycle Initiative The Advanced Fuel Cycle Initiative Science Based Fuel Cycle y Research and Development Phillip Finck Idaho National Laboratory June 9, 2009 Former Programmatic Approach Incremental improvement of existing technologies to allow for short-term (~20 years) deployment, driven by better utilization of Yucca Mountain y ) p y , y - Specific choice of technologies and integrated system (dictated by time frame and Yucca Mountain characteristics) - Challenges were well identified - Engineering approaches were chosen to address these challenges - Fundamental challenges had also been identified (2006 workshops), but were marginally acted upon (e.g., modeling and simulation) The industrial approach resulted in very limited investment in the tools needed

479

Equipment Arrangement Planning of a Fuel Cell Energy Network Optimized for Cost Minimization  

Science Journals Connector (OSTI)

In recent years, uses of the distribution of fuel cells have been studied [9, 10]. Furthermore, fuel cell systems are connected by a network and the micro-grid of the electrical power operated in cooperation ... ...

2009-01-01T23:59:59.000Z

480

Power mixture and green body for producing silicon nitride base & articles of high fracture toughness and strength  

DOE Patents (OSTI)

A powder mixture and a green body for producing a silicon nitride-based article of improved fracture toughness and strength. The powder mixture includes 9a) a bimodal silicon nitride powder blend consisting essentially of about 10-30% by weight of a first silicon mitride powder of an average particle size of about 0.2 .mu.m and a surface area of about 8-12m.sup.2 g, and about 70-90% by weight of a second silicon nitride powder of an average particle size of about 0.4-0.6 .mu.m and a surface area of about 2-4 m.sup.2 /g, (b) about 10-50 percent by volume, based on the volume of the densified article, of refractory whiskers or fibers having an aspect ratio of about 3-150 and having an equivalent diameter selected to produce in the densified articel an equivalent diameter ratio of the whiskers or fibers to grains of silicon nitride of greater than 1.0, and (c) an effective amount of a suitable oxide densification aid. The green body is formed from the powder mixture, an effective amount of a suitable oxide densification aid, and an effective amount of a suitable organic binder.

Huckabee, Marvin L. (Marlboro, MA); Buljan, Sergej-Tomislav (Acton, MA); Neil, Jeffrey T. (Acton, MA)

1991-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "based micro-grid power" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Power mixture and green body for producing silicon nitride base articles of high fracture toughness and strength  

DOE Patents (OSTI)

A powder mixture and a green body for producing a silicon nitride-based article of improved fracture toughness and strength are disclosed. The powder mixture includes (a) a bimodal silicon nitride powder blend consisting essentially of about 10-30% by weight of a first silicon nitride powder of an average particle size of about 0.2 [mu]m and a surface area of about 8-12m[sup 2]g, and about 70-90% by weight of a second silicon nitride powder of an average particle size of about 0.4-0.6 [mu]m and a surface area of about 2-4 m[sup 2]/g, (b) about 10-50 percent by volume, based on the volume of the densified article, of refractory whiskers or fibers having an aspect ratio of about 3-150 and having an equivalent diameter selected to produce in the densified article an equivalent diameter ratio of the whiskers or fibers to grains of silicon nitride of greater than 1.0, and (c) an effective amount of a suitable oxide densification aid. The green body is formed from the powder mixture, an effective amount of a suitable oxide densification aid, and an effective amount of a suitable organic binder. No Drawings

Huckabee, M.L.; Buljan, S.T.; Neil, J.T.

1991-09-17T23:59:59.000Z

482

Economic analysis of amine based carbon dioxide capture system with bi-pressure stripper in supercritical coal-fired power plant  

Science Journals Connector (OSTI)

Post-combustion CO2 capture and storage is among the most mature technologies to capture, compress, transport and store CO2 from flue gas in coal-fired power plant. This paper presents the simulation of monoethanolamine (MEA) based CO2 capture and compression process integrated within a 600 MWe supercritical coal-fired power plant using chemical process simulators. Comparison between bi-pressure stripper and single-pressure stripper reveals that improved CO2 capture system with bi-pressure stripper minimizes energy penalty of CO2 capture and compression by up to 6.3% at full unit load. The study also explores optimization of some important process parameters affecting the performance of coal-fired power plant by taking into account both CO2 capture process and CO2 compression at full unit load. These parameters include operating stripper pressure, CO2 capture efficiency and steam extraction location. Results show that the optimal stripper pressure is within the range of 1.9–2.1 bar and feasible CO2 capture efficiency is between 60% and 90%. Results also show that low-pressure steam extraction reduces energy penalty. Evaluation of improved CO2 capture system is also performed at part flue gas load ranging from 40% to 90%. The study reveals that operating at part flue gas load, as compared with full load, increases energy penalty of carbon capture. Not only energy penalty but also lean solution flow rate and plant efficiency are studied at different flue load levels in this paper. In addition, results show that bi-pressure stripper configuration is also effective in reducing energy penalty at part unit load.

Haiwen Liang; Zhigao Xu; Fengqi Si

2011-01-01T23:59:59.000Z

483

PESC'99, Charleston, South Carolina, June 27 July 1, pp. 393-399. A Multilevel Converter-Based Universal Power Conditioner  

E-Print Network (OSTI)

, and reactive power compensation. Level usage in the series inverter and parallel inverter is analyzed that the customer can impose on the utility. To meet the objectives detailed in these new premium power agreements- clamped inverter into a universal power conditioner is an enticing prospect. A multilevel universal power

Tolbert, Leon M.

484

Feature extraction and classification of load dynamic characteristics based on lifting wavelet packet transform in power system load modeling  

Science Journals Connector (OSTI)

Abstract Load dynamic characteristics classification and synthesis is the main approach to solve the problem of load time-variation. The basis and prerequisite of load dynamic characteristics classification is load dynamic characteristics feature extraction. Load model parameter space or the model response space gained by a standard voltage excitation is usually selected as the feature vector space in current practice of load dynamic characteristics feature extraction. However, both methods need to determine the load model structure and identify the model parameters. It would increase not only calculation error but also calculation time in the process of load model structure determination and parameter identification. Then the accuracy of the final classification results would be affected. It is reasonable and scientific to extract feature vector space of load dynamic characteristics directly from the measured response space. In this paper, a feature extraction method based on lifting wavelet packet transform is proposed for load dynamic characteristics classification. The load measured current response data is decomposed and reconstructed, then the wavelet packet coefficients can be extracted to construct energy moment based feature vector. On this basis, the load dynamic characteristics classification can be realized using fuzzy c-means (FCM) method. Finally, the validity and practicality of the proposed method have been proved by feature extraction and classification of dynamic simulation data acquired using Matlab/Simulink and field measurement data. Compared with traditional wavelet packet transform, the lifting wavelet packet transform has shown advantages both in computational speed and reconstruction error and can improve the accuracy of load dynamic characteristics classification.

Zhenshu Wang; Shaorun Bian; Ming Lei; Chuangang Zhao; Yan Liu; Zhifan Zhao

2014-01-01T23:59:59.000Z

485

A hybrid power plant (Solar–Wind–Hydrogen) model based in artificial intelligence for a remote-housing application in Mexico  

Science Journals Connector (OSTI)

World fossil fuel reserve is expected to be exhausted in coming few decades. Therefore, the decentralization of energy production requires the design and integration of different energy sources and conversion technologies to meet the power demand for single remote housing applications in a sustainable way under various weather conditions. This work focuses on the integration of photovoltaic (PV) system, micro-wind turbine (WT), Polymeric Exchange Membrane Fuel Cell (PEM-FC) stack and PEM water electrolyzer (PEM-WE), for a sustained power generation system (2.5 kW). The main contribution of this work is the hybridization of alternate energy sources with the hydrogen conversion systems using mid-term and short-term storage models based in artificial intelligence techniques built from experimental data (measurements obtained from the site of interest), this models allow to obtain better accuracy in performance prediction (PVMSE = 8.4%, PEM-FCMSE = 2.4%, PEM-WEMSE = 1.96%, GSRMSE = 7.9%, WTMSE = 14%) with a practical design and dynamic under intelligent control strategies to build an autonomous system.

A.U. Chávez-Ramírez; V. Vallejo-Becerra; J.C. Cruz; R. Ornelas; G. Orozco; R. Muñoz-Guerrero; L.G. Arriaga

2013-01-01T23:59:59.000Z

486

An AHP (Analytic Hierarchy Process)/ANP (Analytic Network Process)-based multi-criteria decision approach for the selection of solar-thermal power plant investment projects  

Science Journals Connector (OSTI)

Abstract In this paper the AHP (Analytic Hierarchy Process) and the ANP (Analytic Network Process) are applied to help the managing board of an important Spanish solar power investment company to decide whether to invest in a particular solar-thermal power plant project and, if so, to determine the order of priority of the projects in the company's portfolio. Project management goes through a long process, from obtaining the required construction permits and authorizations, negotiating with different stakeholders, complying with complex legal regulations, to solving the technical problems associated with plant construction and distribution of the energy generated. The whole process involves high engineering costs. The decision approach proposed in this paper consists of three phases. In the first two phases, the managing board must decide whether to accept or reject a project according to a set of criteria previously identified by the technical team. The third phase consists of establishing a priority order among the projects that have proven to be economically profitable based on project risk levels and execution time delays. This work analyzes the criteria that should be taken into account to accept or reject proposals for investment, as well as the risks used to prioritize some projects over others.

Pablo Aragonés-Beltrán; Fidel Chaparro-González; Juan-Pascual Pastor-Ferrando; Andrea Pla-Rubio

2014-01-01T23:59:59.000Z

487

Nuclear power browning out  

SciTech Connect

When the sad history of nuclear power is written, April 26, 1986, will be recorded as the day the dream died. The explosion at the Chernobyl plant was a terrible human tragedy- and it delivered a stark verdict on the hope that nuclear power will one day replace fossil fuel-based energy systems. Nuclear advocates may soldier on, but a decade after Chernobyl it is clear that nuclear power is no longer a viable energy option for the twenty-first century.

Flavin, C.; Lenssen, N.

1996-05-01T23:59:59.000Z

488

Does Electricity (and Heat) Network Regulation have anything to learn from Fixed Line Telecoms?  

E-Print Network (OSTI)

 customers. It is in this context that fixed line  telecoms deregulation becomes of interest. Indeed energy network deregulation and telecoms  deregulation may indeed be technologically related by the fact that micro?grid or ‘island’ power and  heat systems might rely...  usually (but not always) different from the sort of  energy service driven investments that this paper envisages, where independent networks may arise  as part of the optimal asset configuration of a new entrant supply company (e.g. a local energy  service company based on a local combined heat and power...

Pollitt, Michael G.

489

Heilongjiang Lishu Wind Power | Open Energy Information  

Open Energy Info (EERE)

Lishu Wind Power Jump to: navigation, search Name: Heilongjiang Lishu Wind Power Place: Heilongjiang Province, China Sector: Wind energy Product: China-based wind project developer...

490

Hainan Green Islands Power | Open Energy Information  

Open Energy Info (EERE)

Green Islands Power Jump to: navigation, search Name: Hainan Green Islands Power Place: Hainan Province, China Sector: Solar Product: China-based JV developing on-grid solar...

491

Tilbury Green Power | Open Energy Information  

Open Energy Info (EERE)

Name: Tilbury Green Power Place: United Kingdom Sector: Biomass Product: UK based Tilbury Green Power is a 100% subsidiary of Express Energy Holdings, developing biomass fired...

492

Nagarjuna Green Power | Open Energy Information  

Open Energy Info (EERE)

Nagarjuna Green Power Jump to: navigation, search Name: Nagarjuna Green Power Place: Andhra Pradesh, India Sector: Biomass Product: Hyderabad-based biomass project developer....

493

Fuel Cycle Comparison for Distributed Power Technologies  

Fuel Cell Technologies Publication and Product Library (EERE)

This report examines backup power and prime power systems and addresses the potential energy and environmental effects of substituting fuel cells for existing combustion technologies based on microtur

494

Tata Power Ltd | Open Energy Information  

Open Energy Info (EERE)

Power Ltd Jump to: navigation, search Name: Tata Power Ltd. Place: Mumbai, Maharashtra, India Zip: 400 001 Sector: Renewable Energy, Solar, Wind energy Product: Mumbai-based, BSE...

495

Requirements for Computer Based-Procedures for Nuclear Power Plant Field Operators Results from a Qualitative Study  

SciTech Connect

Although computer-based procedures (CBPs) have been investigated as a way to enhance operator performance on procedural tasks in the nuclear industry for almost thirty years, they are not currently widely deployed at United States utilities. One of the barriers to the wide scale deployment of CBPs is the lack of operational experience with CBPs that could serve as a sound basis for justifying the use of CBPs for nuclear utilities. Utilities are hesitant to adopt CBPs because of concern over potential costs of implementation, and concern over regulatory approval. Regulators require a sound technical basis for the use of any procedure at the utilities; without operating experience to support the use CBPs, it is difficult to establish such a technical basis. In an effort to begin the process of developing a technical basis for CBPs, researchers at Idaho National Laboratory are partnering with industry to explore CBPs with the objective of defining requirements for CBPs and developing an industry-wide vision and path forward for the use of CBPs. This paper describes the results from a qualitative study aimed at defining requirements for CBPs to be used by field operators and maintenance technicians.

Katya Le Blanc; Johanna Oxstrand

2012-05-01T23:59:59.000Z

496

The Effect of Solution Processing on the Power Conversion Efficiency of P3HT-based Organic Solar Cells  

Science Journals Connector (OSTI)

Abstract Chloroform, Chlorobenzene, 1, 2-Dichlorobenze and co-solvent Chlorobenzene with Chloroform (1:1) were used to investigate the influence of the solvent on the morphology of P3HT:PCBM (with the ratio 1:1) as well as the photovoltaic properties of organic solar cells based on this polymer blend. Using co-solvents leads to higher absorption intensity as compared to other studied solvents. XRD measurements reveal improved crystallinity in P3HT films prepared by chloroform and chlorobenzene while large aggregates appeared in films prepared using dichlorobenzene. Films produced using co-solvents show well-ordered structure and improved crystallinity; these results were further confirmed by SEM images. The J(V) measurements show that a maximum PCE of 1.47% is obtained in films produced using co-solvents. This was associated with significant improvement in current density (11.77 mA/cm2) and a fill factor of 0.4 which was determined from the series and shunt resistances. Open circuit voltage has decreased in film prepared by co-solvents (0.31 Volt), and improved significantly (0.54 Volt) in film prepared in chloroform.

Burak Y. Kadem; Mohammed K. Al-hashimi; A.K. Hassan

2014-01-01T23:59:59.000Z

497

Tianjin Jinneng Wind Power Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Jinneng Wind Power Co Ltd Place: Tianjin Municipality, China Sector: Wind energy Product: Tianjin-based wind power project developer. References: Tianjin Jinneng Wind Power Co...

498

Qualification for PowerInsight accuracy of power measurements.  

SciTech Connect

Accuracy of component based power measuring devices forms a necessary basis for research in the area of power-e cient and power-aware computing. The accuracy of these devices must be quanti ed within a reasonable tolerance. This study focuses on PowerInsight, an out- of-band embedded measuring device which takes readings of power rails on compute nodes within a HPC system in realtime. We quantify how well the device performs in comparison to a digital oscilloscope as well as PowerMon2. We show that the accuracy is within a 6% deviation on measurements under reasonable load.

DeBonis, David; Laros, James H.,; Pedretti, Kevin Thomas Tauke

2013-11-01T23:59:59.000Z

499

Thermionic power generation. January 1972-December 1980 (citations from the International Aerospace Abstracts Data Base). Report for January 1972-December 1980  

SciTech Connect

Research on thermionic power generation, power plant design, converter design, and basic research on thermionic materials are cited in the bibliography. Spacecraft applications are also included. (Contains 142 citations, fully indexed and including a table of contents.)

Not Available

1980-12-01T23:59:59.000Z

500

Design and Research on Co-simulation Training System of Large-Scale Power Grid with Distribution Network Based on Intelligent Materials System  

Science Journals Connector (OSTI)

The power system training simulation software, exist in the market, ... flow calculation without the local details or equipment operation, or focus on one or two substations, but ignoring the power of the substat...

BaiShan Mei; XiPing Zhang; Jie Xu…

2011-01-01T23:59:59.000Z