Powered by Deep Web Technologies
Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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.


1

Circuit Topology Study of Grid-Connected Photovoltaic System.  

E-Print Network [OSTI]

??Many different circuit topologies have been suggested for large scale photovoltaic systems. The cost and the efficiency are still the major issues of large scale… (more)

Mansouri, Seyed Akbar

2011-01-01T23:59:59.000Z

2

An economic analysis of grid-connected residential solar photovoltaic power systems  

E-Print Network [OSTI]

The question of the utility grid-connected residential market for photovoltaics is examined from a user-ownership perspective. The price is calculated at which the user would be economically indifferent between

Carpenter, Paul R.

3

Design of control circuit of grid-connected photovoltaic system based on SPMC75F2413A  

Science Journals Connector (OSTI)

This paper discusses the experimental design of a grid-*connected photovoltaic system based on 16-bit Microprocessor (MCU) SPMC75F2413A. In this paper, the SPMC75F2413A as the main topology control the main circuit of the Single-phase bridge type inverter. The system can track the maximum power point by detecting PV(photovoltaic) voltage, current and grid-connected output voltage and current, and simultaneously can track the frequency and phase by the software phase locked loop. The testing results of the grid-connected photovoltaic system shows that the grid-connected voltage and network voltage are synchronous, and the system is feasible and practical.

Ma Hongmei; Li Peng; Zhang Dan

2010-01-01T23:59:59.000Z

4

Optimum penetration of utility-scale grid-connected solar photovoltaic systems in Illinois  

Science Journals Connector (OSTI)

Abstract Although solar photovoltaics (PV) are recognized as a promising source of clean energy production, researchers and policy makers need to know the optimum level of solar PV capacity penetration into the existing generation structure under the current fuel mix for the region. As the level of installed PV capacity increases, it is possible that the aggregated generation mix could produce electrical power exceeding electrical demand, thus requiring generator curtailment. Therefore, determining the optimum penetration of large-scale PV and aggregated technical and economic benefits is becoming an issue for both power utilities and policy makers. We report the development and validation of a new methodology for assessing the optimum capacity and benefits of state-wide grid-connected large scale solar PV systems in Illinois. The solar carve-out portion of the current renewable portfolio standard is also evaluated within the context of the state's sustainable energy plan for the near term future.

J.H. Jo; D.G. Loomis; M.R. Aldeman

2013-01-01T23:59:59.000Z

5

Operation strategy for a lab-scale grid-connected photovoltaic generation system integrated with battery energy storage  

Science Journals Connector (OSTI)

Abstract The operation strategy for a lab-scale grid-connected photovoltaic generation system integrated with battery energy storage is proposed in this paper. The photovoltaic generation system is composed of a full-bridge inverter, a DC–DC boost converter, an isolated bidirectional DC–DC converter, a solar cell array and a battery set. Since the battery set acts as an energy buffer to adjust the power generation of the solar cell array, the negative impact on power quality caused by the intermittent and unstable output power from a solar cell array is alleviated, so the penetration rate of the grid-connected photovoltaic generation system is increased. A lab-scale prototype is developed to verify the performance of the system. The experimental results show that it achieves the expected performance.

Hurng-Liahng Jou; Yi-Hao Chang; Jinn-Chang Wu; Kuen-Der Wu

2015-01-01T23:59:59.000Z

6

High Penetration, Grid Connected Photovoltaic Technology Codes and Standards: Preprint  

SciTech Connect (OSTI)

This paper reports the interim status in identifying and reviewing photovoltaic (PV) codes and standards (C&S) and related electrical activities for grid-connected, high-penetration PV systems with a focus on U.S. electric utility distribution grid interconnection.

Basso, T. S.

2008-05-01T23:59:59.000Z

7

GROWDERS Demonstration of Grid Connected Electricity Systems...  

Open Energy Info (EERE)

GROWDERS Demonstration of Grid Connected Electricity Systems (Smart Grid Project) (Spain) Jump to: navigation, search Project Name GROWDERS Demonstration of Grid Connected...

8

Three-Phase Modular Cascaded H-Bridge Multilevel Inverter with Individual MPPT for Grid-Connected Photovoltaic Systems  

SciTech Connect (OSTI)

A three-phase modular cascaded H-bridge multilevel inverter for a grid-connected photovoltaic (PV) system is presented in this paper. To maximize the solar energy extraction of each PV string, an individual maximum power point tracking (MPPT) control scheme is applied, which allows the independent control of each dc-link voltage. PV mismatches may introduce unbalanced power supplied to the three-phase system. To solve this issue, a control scheme with modulation compensation is proposed. The three-phase modular cascaded multilevel inverter prototype has been built. Each H-bridge is connected to a 185 W solar panel. Simulation and experimental results are presented to validate the proposed ideas.

Xiao, Bailu [ORNL; Hang, Lijun [ORNL; Riley, Cameron [University of Tennessee, Knoxville (UTK); Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL

2013-01-01T23:59:59.000Z

9

A novel multi-model neuro-fuzzy-based MPPT for three-phase grid-connected photovoltaic system  

SciTech Connect (OSTI)

This paper presents a novel methodology for Maximum Power Point Tracking (MPPT) of a grid-connected 20 kW photovoltaic (PV) system using neuro-fuzzy network. The proposed method predicts the reference PV voltage guarantying optimal power transfer between the PV generator and the main utility grid. The neuro-fuzzy network is composed of a fuzzy rule-based classifier and three multi-layered feed forwarded Artificial Neural Networks (ANN). Inputs of the network (irradiance and temperature) are classified before they are fed into the appropriated ANN for either training or estimation process while the output is the reference voltage. The main advantage of the proposed methodology, comparing to a conventional single neural network-based approach, is the distinct generalization ability regarding to the nonlinear and dynamic behavior of a PV generator. In fact, the neuro-fuzzy network is a neural network based multi-model machine learning that defines a set of local models emulating the complex and nonlinear behavior of a PV generator under a wide range of operating conditions. Simulation results under several rapid irradiance variations proved that the proposed MPPT method fulfilled the highest efficiency comparing to a conventional single neural network and the Perturb and Observe (P and O) algorithm dispositive. (author)

Chaouachi, Aymen; Kamel, Rashad M.; Nagasaka, Ken [Department of Electronic and Information Engineering, Tokyo University of Agriculture and Technology, Nakamachi (Japan)

2010-12-15T23:59:59.000Z

10

Energy dispatch schedule optimization and cost benefit analysis for grid-connected, photovoltaic-battery storage systems  

E-Print Network [OSTI]

side hybrid photovoltaic and battery energy storage system,to combined photovoltaic and battery energy storage systemsphotovoltaic systems, IEEE Transactions on Sustainable Energy (

Nottrott, A.; Kleissl, J.; Washom, B.

2013-01-01T23:59:59.000Z

11

Novel MIMO Linear Zero Dynamic Controller for the Grid-connected Photovoltaic System with  

E-Print Network [OSTI]

sources, such as sunlight, wind, rain, tides and geothermal heat, are the best choices as alternative sources of energy [1]. All of these renewable sources, solar energy is the most commonly use renewable source in the power system. It is the fastest growing renewable source in the world. The energy report

Pota, Himanshu Roy

12

A single-phase grid-connected PV system with active power filter  

Science Journals Connector (OSTI)

In this paper a single-phase active power filter based in a two stages grid-connected photovoltaic system is presented. The proposed system can not only inject PV power into utility but can act always as an active power filter to compensate the load ... Keywords: THD, grid-connected PV systems, power factor and active power filter, single-phase systems

Kleber C. A. De Souza; Denizar C. Martins

2008-07-01T23:59:59.000Z

13

Energy dispatch schedule optimization and cost benefit analysis for grid-connected, photovoltaic-battery storage systems  

E-Print Network [OSTI]

State Assembly Bill 2514 – Energy storage systems,” Energy Storage for the Electricity5. D. Rastler, Electric Energy Storage Technology Options: A

Nottrott, A.; Kleissl, J.; Washom, B.

2013-01-01T23:59:59.000Z

14

Performance Parameters for Grid-Connected PV Systems  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

National Renewable Energy Laboratory National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy by Midwest Research Institute * Battelle Contract No. DE-AC36-99-GO10337 B. Marion, J. Adelstein, and K. Boyle National Renewable Energy Laboratory H. Hayden, B. Hammond, T. Fletcher, B. Canada, and D. Narang Arizona Public Service Co. D. Shugar, H. Wenger, A. Kimber, and L. Mitchell PowerLight Corporation G. Rich and T. Townsend First Solar Prepared for the 31 st IEEE Photovoltaics Specialists Conference and Exhibition Lake Buena Vista, Florida January 3-7, 2005 February 2005 * NREL/CP-520-37358 Performance Parameters for Grid-Connected PV Systems

15

Optimal Residential Solar Photovoltaic Capacity in Grid Connected Applications  

Science Journals Connector (OSTI)

Abstract Microgeneration using solar photovoltaic systems is becoming increasingly popular in residential households as such systems allow households to use a renewable energy source, while also reducing their reliance on the electricity grid, to fulfill their electricity demand. In this study, we explore the attractiveness of PV microgeneration systems of different capacities in the absence of incentives and net metering options and under both flat and variable tariff scenarious. Smaller systems that are below 1 kW in capacity are more attractive under such conditions, however, at current cost levels, they still remain economically unattractive. The cost levels which allow for these PV systems to be economically viable are also determined.

Shisheng Huang; Jingjie Xiao; Joseph F. Pekny; Gintaras V. Reklaitis

2012-01-01T23:59:59.000Z

16

Grid-Connected Renewable Energy Systems | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Grid-Connected Renewable Energy Systems Grid-Connected Renewable Energy Systems Grid-Connected Renewable Energy Systems July 2, 2012 - 8:21pm Addthis When connecting a home energy system to the electric grid, research and consider equipment required as well as your power provider’s requirements and agreements. | Photo courtesy of Solar Design Associates, Inc. When connecting a home energy system to the electric grid, research and consider equipment required as well as your power provider's requirements and agreements. | Photo courtesy of Solar Design Associates, Inc. What are the key facts? While renewable energy systems are capable of powering houses and small businesses without any connection to the electricity grid, many people prefer the advantages that grid-connection offers. Aside from the major small renewable energy system components, you

17

GROWDERS Demonstration of Grid Connected Electricity Systems (Smart Grid  

Open Energy Info (EERE)

GROWDERS Demonstration of Grid Connected Electricity Systems (Smart Grid GROWDERS Demonstration of Grid Connected Electricity Systems (Smart Grid Project) Jump to: navigation, search Project Name GROWDERS Demonstration of Grid Connected Electricity Systems Country France Coordinates 46.134171°, 1.933594° 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":46.134171,"lon":1.933594,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

18

Grid-Connected Renewable Energy Systems Case Studies | Open Energy  

Open Energy Info (EERE)

Grid-Connected Renewable Energy Systems Case Studies Grid-Connected Renewable Energy Systems Case Studies Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Grid-Connected Renewable Energy Systems Case Studies Agency/Company /Organization: World Bank Sector: Energy Topics: Market analysis, Co-benefits assessment, Background analysis Resource Type: Lessons learned/best practices, Case studies/examples Website: web.worldbank.org/WBSITE/EXTERNAL/TOPICS/EXTENERGY2/EXTRENENERGYTK/0,, Country: Uganda, Mexico, Turkey, Germany, Sri Lanka, China Eastern Africa, Central America, Western Asia, Western Europe, Southern Asia, Eastern Asia Coordinates: 1.373333°, 32.290275° 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":1.373333,"lon":32.290275,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

19

GROWDERS Demonstration of Grid Connected Electricity Systems (Smart Grid  

Open Energy Info (EERE)

(Spain) (Spain) Jump to: navigation, search Project Name GROWDERS Demonstration of Grid Connected Electricity Systems Country Spain Coordinates 40.338169°, -3.438721° 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":40.338169,"lon":-3.438721,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

20

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

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Direct power control of grid connected PV systems with three level NPC inverter  

SciTech Connect (OSTI)

This paper presents the control of a three-level Neutral Point Clamped (NPC) voltage source inverter for grid connected photovoltaic (PV) systems. The control method used is the Extended Direct Power Control (EDPC), which is a generic approach for Direct Power Control (DPC) of multilevel inverters based on geometrical considerations. Maximum Power Point Tracking (MPPT) algorithms, that allow maximal power conversion into the grid, have been included. These methods are capable of extracting maximum power from each of the independent PV arrays connected to each DC link voltage level. The first one is a conventional MPPT which outputs DC link voltage references to EDPC. The second one is based on DPC concept. This new MPPT outputs power increment references to EDPC, thus avoiding the use of a DC link voltage regulator. The whole control system has been tested on a three-level NPC voltage source inverter connected to the grid and results confirm the validity of the method. (author)

Alonso-Martinez, Jaime; Eloy-Garcia, Joaquin; Arnaltes, Santiago [Dept. of Electrical Engineering, University Carlos III of Madrid, Avda. Universidad 30, 28911 Leganes, Madrid (Spain)

2010-07-15T23:59:59.000Z

22

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

Broader source: Energy.gov (indexed) [DOE]

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

23

Wind energy and system security – the grid connection moratorium in Ireland  

Science Journals Connector (OSTI)

This examines the interaction between technical challenges and policy choices that are made regarding wind power, and uses the grid connection moratorium in Ireland as a case study. While total installed wind capacity in Ireland is low compared with Germany, Spain and Denmark, wind power penetration is higher in the Irish system than in either the British, UCTE or NORDEL systems. In December 2003 the system operators expressed concerns about high wind power penetration, in particular the challenges of maintaining power system stability, security and reliability, resulting in a moratorium on new grid connection agreements. Significant progress has since been made in grid codes and dynamic models for wind turbines. In March 2006, there remain almost 3000 MW of proposed wind capacity awaiting a grid connection agreement. This paper investigates the technical issues underpinning this moratorium, monitors progress made since its introduction and suggests alternative technical solutions to the moratorium.

B.P. O Gallachoir; P. Gardner; H. Snodin; E.J. McKeogh

2007-01-01T23:59:59.000Z

24

The promotion of domestic grid-connected photovoltaic electricity production through social learning  

Science Journals Connector (OSTI)

An effective social learning process which enhances public understanding of photovoltaic installations in residential dwellings and the economic instruments used by governments to encourage investment in this ...

Greg Hampton; Simon Eckermann

2013-11-01T23:59:59.000Z

25

MODULAR MULTI-LEVEL CONVERTER BASED HVDC SYSTEM FOR GRID CONNECTION OF OFFSHORE WIND  

E-Print Network [OSTI]

MODULAR MULTI-LEVEL CONVERTER BASED HVDC SYSTEM FOR GRID CONNECTION OF OFFSHORE WIND POWER PLANT U off-shore wind power plants. The MMC consists of a large number of simple voltage sourced converter offshore wind power plants (WPP) because they offer higher energy yield due to a superior wind profile

Chaudhary, Sanjay

26

Power Smoothing Control in a Grid-Connected Marine Current Turbine System for Compensating  

E-Print Network [OSTI]

Power Smoothing Control in a Grid-Connected Marine Current Turbine System for Compensating Swell d-axis and q-axis inductances g, g Grid inductance and resistance Pole pair number R Turbine blade-axis and q-axis voltages Turbine and generator power difference , g Rotor position, grid voltage angle

Boyer, Edmond

27

Economic analysis of standalone and grid connected hybrid energy systems  

Science Journals Connector (OSTI)

A pilot region was selected and cost analysis of using renewable energy sources with a hydrogen system for that region’s energy demand is introduced, in a techno-economic perspective, in this paper. The renewable energy potential for the region was evaluated by implementing energy cost analysis. The study also evaluates the feasibility of utilizing solar and wind energy with hydrogen as a storage unit to meet the electricity requirements of the pilot region as a standalone system and in conjunction with the conventional grid based electricity. In order to simulate the operation of the system and to calculate the technical and economic parameters, micropower optimization program Homer (NREL, US) was used in this study. Homer requires some input values, such as technological options, cost of components, and resource compliance; and then the program ranges the feasible system configurations according to the net present cost (system cost) by using these inputs. The pilot region in this study, where the renewable based energy will be used, is determined to be Electrics & Electronics Faculty, Istanbul Technical University.

Belgin Emre Türkay; Ali Yasin Telli

2011-01-01T23:59:59.000Z

28

Battery Management for Grid-Connected PV Systems with a Battery  

E-Print Network [OSTI]

}@usc.edu ABSTRACT Photovoltaic (PV) power generation systems are one of the most promising renewable power sources-connected systems, Photovoltaic power, Electricity bill 1. INTRODUCTION The number and capacity of photovoltaic (PV for customers to save enough money with lower monthly electricity bills to compensate the initial cost

Pedram, Massoud

29

Measurement system design and implementation for grid-connected marine substation  

Science Journals Connector (OSTI)

A marine substation for a grid-connected wave power plant has been designed and constructed at Uppsala University. The measurement system for the substation has been developed from basics, and the procedure is described in this article. Subsea electrical installations set high constraints on the control and data acquisition systems used, and traditional GSM networks and GPS time synchronization are difficult and inefficient. These circumstances exclude many well-proven methods to be utilized. A compactRIO-based system, with integrated real-time controller and Field-Programmable Gate Array chip, is chosen as most suitable for this task. The system is designed to meet the special requirements encountered in this unusual application, including large data sampling, grid connection control and protection systems. The system is communicating to shore via a subsea copper cable and single-pair high-speed digital subscriber line modems. The design was successful and full-fills all the system requirements. The aim of the article is to provide future researchers with a good design and implementation procedure for setting up large measurement systems.

Rickard Ekström; Venugopalan Kurupath; Olle Svensson; Mats Leijon

2013-01-01T23:59:59.000Z

30

Simulation of a new grid-connected hybrid generation system with Stirling engine and wind turbine  

Science Journals Connector (OSTI)

A detail model including all mechanical and electrical aspects is necessary to fully study hybrid grid operation. In this paper a new grid-connected hybrid generation system with a Stirling engine and a wind turbine which are connected to a grid through a common dc bus is presented. The Stirling is more efficient than photo voltaic array and its combination with the wind turbine can create an efficient hybrid system. Fatigue Aerodynamics Structures and Turbulence and Simulink/MATLAB are used to model the mechanical parts of the wind turbine Stirling engine and electrical parts. Field oriented control method is developed on voltage source converter. Power signal feedback method is implemented to determine generators reference shaft speed in hybrid system. Permanent magnet synchronous generator is used in the wind turbine and Stirling engine. Simulation results show that a new hybrid generation system with Stirling and wind turbine can work like other hybrid system and has suitable performance.

H. Shariatpanah; M. Zareian Jahromi; R. Fadaeinedjad

2013-01-01T23:59:59.000Z

31

Nevada Deploys Grid-Connected Electricity from Enhanced Geothermal...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Nevada Deploys Grid-Connected Electricity from Enhanced Geothermal Systems Nevada Deploys Grid-Connected Electricity from Enhanced Geothermal Systems May 16, 2013 - 12:00am Addthis...

32

Economic feasibility of a PV system for grid-connected semiconductor facilities in South Korea  

Science Journals Connector (OSTI)

In this study, a cost optimization and sensitivity analysis were carried out for the deployment of a photovoltaic (PV) system in a semiconductor facility in South Korea. The Microgrid software (HOMER) was used...

Hyung Jong Choi; Gwon Deok Han…

2013-11-01T23:59:59.000Z

33

Wavelet technique based islanding detection and improved repetitive current control for reliable operation of grid-connected PV systems  

Science Journals Connector (OSTI)

Abstract Recent years have witnessed a thrust towards the use of solar energy as the major renewable energy source for distributed power generation. The proposed system requires reliable detection technique and suitable current control strategy for proper operation. This paper focuses on plug-in repetitive current (RC) control strategy for grid connected inverter system and wavelet technique for electrical grid status identification. The performance of proposed current control technique employed for grid connected inverter system under distorted and unbalanced grid voltage is compared with the existing conventional methods like PI and PR controller. This controller uses the feedback control system for attenuating periodic disturbances, improving high quality sinusoidal output current and high power factor. The proposed scheme employs fourth order infinite impulse response (IIR) filter for maintaining its resonance frequency, output frequency matching with grid fundamental frequency and reduction of harmonics. The DC-DC boost converter implements incremental conductance based (INC) maximum power point tracker (MPPT) algorithm. The effects of LCL filter for improving disturbance rejection capability and dynamic performance of the proposed system is also demonstrated. Grid connected PV inverter employs wavelet technique for an islanding detection functionality in order to determine the status of the electrical grid. In order to show the effectiveness of the proposed algorithm, modeling and simulation for grid connected PV system is performed using MATLAB/SIMULINK and its PowerSim toolbox.

Smitha Joyce Pinto; Gayadhar Panda

2015-01-01T23:59:59.000Z

34

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

35

Blanc, I., Beloin-Saint-Pierre, D., Payet, J., Jacquin, P., Adra, N., Mayer, D., Espace-PV: key sensitive parameters for environmental impacts of grid-connected PV systems with LCA , In Proceedings of the 23rd  

E-Print Network [OSTI]

sensitive parameters for environmental impacts of grid-connected PV systems with LCA », In Proceedings FOR ENVIRONMENTAL IMPACTS OF GRID-CONNECTED PV SYSTEMS WITH LCA I. BLANC1 , D. BELOIN-SAINT-PIERRE1 , J. PAYET2 , P of sensitive parameters for the life cycle analysis (LCA) of PV system showed that irradiation intensity

Paris-Sud XI, Université de

36

Homeowners Guide to Financing a Grid-Connected Solar Electric System (Brochure)  

SciTech Connect (OSTI)

This guide provides an overview of the financing options that may be available to homeowners who are considering installing a solar electric system on their house.

Not Available

2010-10-01T23:59:59.000Z

37

Fuzzy logic control of grid connected DFIG system using back-to-back converters  

Science Journals Connector (OSTI)

This paper deals with the power generation control in variable speed wind turbines. In this context, the wind energy conversion system is equipped with a doubly-fed induction generator (DFIG) and two back-to-back...

Abdelhak Dida; Djilani Ben Attous

2014-11-01T23:59:59.000Z

38

Maximizing Return on Investment of a Grid-Connected Hybrid Electrical Energy Storage System  

E-Print Network [OSTI]

residential users to perform demand side management. There are several ways to perform demand side management) Derivation of an optimal HEES management policy to maximize the daily energy cost saving and (ii) Optimal fluctuates within a much smaller range compared to the demand. Figure 1 shows a 24-hour profile of system

Pedram, Massoud

39

A lightweight inverter for off-grid and grid-connected systems  

SciTech Connect (OSTI)

This paper presents a novel bi-directional power processing topology particularly suitable as an inverter for both grid and off-grid alternative energy systems. All semiconductor devices are soft-switched, thereby allowing higher switching frequencies, improving efficiency, and reducing electromagnetic interference (EMI). The topology may utilize a small, light-weight, and inexpensive high-frequency transformer. Experimental results of a 1 kW bi-directional dc-dc converter are presented.

Barone, F. [Univ. of New South Wales, Sydney, New South Wales (Australia). Centre for Photovoltaic Devices and Systems

1994-12-31T23:59:59.000Z

40

INTEGRATING PHOTOVOLTAIC SYSTEMS  

E-Print Network [OSTI]

INTEGRATING PHOTOVOLTAIC SYSTEMS INTO PUBLIC SECTOR PERFORMANCE CONTRACTS IN DELAWARE FINAL for Energy and Environmental Policy University of Delaware February 2006 #12;INTEGRATING PHOTOVOLTAIC..................................................................................................... 1 1.2 Photovoltaics in Performance Contracts: An Overview

Delaware, University of

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

This article has been accepted for inclusion in a future issue of this journal. Content is final as presented, with the exception of pagination. IEEE JOURNAL OF PHOTOVOLTAICS 1  

E-Print Network [OSTI]

as presented, with the exception of pagination. IEEE JOURNAL OF PHOTOVOLTAICS 1 Robust Partial Feedback Linearizing Stabilization Scheme for Three-Phase Grid-Connected Photovoltaic Systems M. A. Mahmud, Member a robust stabilization scheme for a three-phase grid-connected photovoltaic system to control the current

Pota, Himanshu Roy

42

The Research of Non-isolated Photovolatic Grid-connected Inverter Based on DSP&ARM  

Science Journals Connector (OSTI)

Implementation scheme of non-isolated photovolatic grid-connected inverter based on DSP & ARM is proposed in the paper. The structure and principle of non-isolated grid-connected inverter is introduced. The design of hardware and software system based ... Keywords: non-isolated, grid-connected inverte, deadbeat control, MPPT

Zhang Xiaoli; Xue Jiaxiang; Liang Yongquan; Cui Longbin

2012-04-01T23:59:59.000Z

43

Homeowners Guide to Financing a Grid-Connected Solar Electric System (Brochure), Solar Energy Technologies Program (SETP)  

Broader source: Energy.gov [DOE]

This guide provides an overview of the financing options that may be available to homeowners who are considering installing a solar electric system on their house.

44

Field Test and Evaluation Report Five Photovoltaic Power Systems for the City of Tucson  

Broader source: Energy.gov [DOE]

Members of the DOE solar energy Tiger Team tested five municipally owned, grid connected photovoltaic (PV) power systems for the City of Tucson on March 26 and 27, 2008. The five PV systems tested were Southeast Service Center, Clements Fitness Center, and Thonydale water treatment plant systems 1, 2, and 3. During all tests, skies were virtually cloudless with only occasional, high cirrus present, and none during array testing.

45

Application and Development of Building-Integrated Photovoltaics(BIPV) System in China  

Science Journals Connector (OSTI)

Building integrated photovoltaics (BIPV) has potential of becoming the...2 of photovoltaics integrated into the roof and facade will be built in Shanghai this year. Its design, BIPV modules, grid-connected scheme...

Guoqiang Hao; Xiaotong Yu; Yong Huang…

2009-01-01T23:59:59.000Z

46

AN "AC INDUCTOR" BASED GRID CONNECTED INVERTER  

E-Print Network [OSTI]

AN "AC INDUCTOR" BASED GRID CONNECTED INVERTER Ilya Zeltser, Student Member, IEEE and Sam Ben proposes a soft switched Output Current Sourcing (OCS) grid connected inverter that applies a high sourcing inverters where the small disturbance at the line voltage may lead to current run away

47

Integration Technology for PHEV-Grid-Connectivity, with Support...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Technology for PHEV-Grid-Connectivity, with Support for SAE Electrical Standards Integration Technology for PHEV-Grid-Connectivity, with Support for SAE Electrical Standards 2010...

48

Energy dispatch schedule optimization and cost benefit analysis for grid-connected, photovoltaic-battery storage systems  

E-Print Network [OSTI]

the on-peak and off-peak energy markets. Price arbitrage isin the time-of-use energy market, but its success as aEnergy Storage for the Electricity Grid: Benefits and Market

Nottrott, A.; Kleissl, J.; Washom, B.

2013-01-01T23:59:59.000Z

49

Honeywell Parallon Grid-connect Tests Honeywell Grid-connect Tests  

E-Print Network [OSTI]

Appendix C Honeywell Parallon Grid-connect Tests 12/20/2000 #12;Honeywell Grid-connect Tests 12 power Engine Speed Figure C-1: Ramp Down Tests ­ Power and Shaft Speed ­ 15 kW Steps #12;Honeywell Grid Figure C-2: Ramp Down Tests ­ Power and Turbine Exit Temperature ­ 15 kW Steps #12;Honeywell Grid

50

Residential photovoltaic systems costs  

SciTech Connect (OSTI)

A study of costs associated with the installation and operation of a residential photovoltaic system has been conducted to determine present and projected (1986) status. As a basis for the study, a residential photovoltaic system design projected for 1986 was assumed, consisting of two principal components: a roof-mounted array and a utility-interactive inverter. The scope of the study encompassed both silicon and cadmium sulfide photovoltaic modules. Cost estimates were obtained by a survey and study of reports generated by companies and agencies presently active in each of the subsystem area. Where necessary, supplemental estimates were established as part of this study. The range of estimates for silicon-based systems strongly suggest that such systems will be competitive for new installations and reasonably competitive for retrofit applications. The cadmium-sulfide-based system cost estimates, which are less certain than those for silicon, indicate that these systems will be marginally competitive with silicon-based systems for new construction, but not competitive for retrofit applications. Significant variations from the DOE system price sub-goals were found, however, particularly in the areas of array mounting, wiring and cleaning. Additional development work appears needed in these areas.

Cox, C.H. III

1980-01-01T23:59:59.000Z

51

Comparison of Photovoltaic Models in the System Advisor Model: Preprint  

SciTech Connect (OSTI)

The System Advisor Model (SAM) is free software developed by the National Renewable Energy Laboratory (NREL) for predicting the performance of renewable energy systems and analyzing the financial feasibility of residential, commercial, and utility-scale grid-connected projects. SAM offers several options for predicting the performance of photovoltaic (PV) systems. The model requires that the analyst choose from three PV system models, and depending on that choice, possibly choose from three module and two inverter component models. To obtain meaningful results from SAM, the analyst must be aware of the differences between the model options and their applicability to different modeling scenarios. This paper presents an overview the different PV model options and presents a comparison of results for a 200-kW system using different model options.

Blair, N. J.; Dobos, A. P.; Gilman, P.

2013-08-01T23:59:59.000Z

52

SURVEILLANCE OF PHOTOVOLTAIC SOLAR ENERGY SYSTEMS USING METEOSAT DERIVED IRRADIANCES  

E-Print Network [OSTI]

, OltmannstraĂ?e 5, D-79100 Freiburg 4University of Applied Sciences Magdeburg, BreitscheidstraĂ?e 2, D-29114 Magdeburg 5Department of Science, Technology and Society, Utrecht University, Padualaan 14, NL-3584 CH Utrecht ABSTRACT In this paper, we describe a surveillance procedure for grid connected photovoltaic (PV

Heinemann, Detlev

53

Letting The Sun Shine On Solar Costs: An Empirical Investigation Of Photovoltaic Cost Trends In California  

E-Print Network [OSTI]

INVESTIGATION OF PHOTOVOLTAIC COST TRENDS IN CALIFORNIA RyanInvestigation of Photovoltaic Cost Trends in California”,cost of customer-sited, grid-connected solar photovoltaic (

Wiser, Ryan; Bolinger, Mark; Cappers, Peter; Margolis, Robert

2006-01-01T23:59:59.000Z

54

Potential residential PV development in Chile: The effect of Net Metering and Net Billing schemes for grid-connected PV systems  

Science Journals Connector (OSTI)

Abstract In recent years the global photovoltaic (PV) market has expanded rapidly due to a sharp decline in PV prices and increased attention to the importance of sustainable energy. Northern Chile has one of the highest irradiance levels in the world as well as one the highest electricity rates in Latin America. Because of these conditions, Chile is one of very few countries where several PV projects are being developed without government subsidies and consequently, the PV industry is experiencing rapid growth. This paper reviews the opportunity to take advantage of these market conditions within the residential sector, modeling PV arrays across 10 cities in Chile. A detailed modeling of PV systems is performed to achieve an accurate analysis of energy production and electricity cost, using local resource data, optimal array orientation and inclination, and production losses. A review of how Net Metering and Net Billing affect the value of the PV production is applied and a comparison using levelized cost of electricity (LCOE) is conducted. Net Metering is found to be a better policy choice to promote PV systems than Net Billing because energy injected into the electrical network is paid at the complete retail rate. However, in developed countries this kind of policy is unlikely to be supported because of it?s economic unfeasibility. Under a Net Billing scheme a consumer will see an advantage when energy is recorded over longer time intervals and when installing a system with smaller capacity relative to household electricity consumption. This prevents excess generation from being injected into the network which would be bought by the utility at lower prices than the retail rate. Payback periods are found to be low, between 6 years in northern areas with high retail rates and 13 years in other areas with lower radiation and retail rates.

David Watts; Marcelo F. Valdés; Danilo Jara; Andrea Watson

2015-01-01T23:59:59.000Z

55

Study of Power Grid Connection with an Unstable Source from Elevator Energy Regenerative Unit (EERU)  

Science Journals Connector (OSTI)

Abstract This paper presents a study of power grid connection with an unstable source from elevator energy regenerative unit (EERU). The investigated system used a Permanent Magnet Synchronous Motor (PMSM). The EERU is installed for this system to generate electricity according to the generative mode of the elevator which delivers power to the grid as an unstable power source. To meet standard specifications in term of power quality and safety for grid connection, the phase angle and the amplitude as well as the frequency of the grid voltage are considered for grid connection. Phase lock loop (PLL) algorithm is therefore very important and selected for grid synchronization. The study is done by simulation using Matlab/Simulink program. The simulation used phase lock loop to synchronize between two systems. The results of this simulation will lead to a proper design of the grid connection with EERU as an unstable power source.

A. Noppakant; B. Plangklang; Y. Paraken

2014-01-01T23:59:59.000Z

56

Grid-Connected Renewable Energy Generation Toolkit-Hydroelectric | Open  

Open Energy Info (EERE)

Grid-Connected Renewable Energy Generation Toolkit-Hydroelectric Grid-Connected Renewable Energy Generation Toolkit-Hydroelectric Jump to: navigation, search Tool Summary Name: Grid-Connected Renewable Energy Generation Toolkit-Hydroelectric Agency/Company /Organization: United States Agency for International Development Sector: Energy Resource Type: Training materials Website: www.energytoolbox.org/gcre/mod_4/index.shtml Grid-Connected Renewable Energy Generation Toolkit-Hydroelectric Screenshot References: Grid-Connected Renewable Energy Generation Toolkit-Hydroelectric[1] Logo: Grid-Connected Renewable Energy Generation Toolkit-Hydroelectric GCREhydro.JPG References ↑ "Grid-Connected Renewable Energy Generation Toolkit-Hydroelectric" Retrieved from "http://en.openei.org/w/index.php?title=Grid-Connected_Renewable_Energy_Generation_Toolkit-Hydroelectric&oldid=375082

57

Photovoltaic module mounting system  

DOE Patents [OSTI]

A solar array mounting system having unique installation, load distribution, and grounding features, and which is adaptable for mounting solar panels having no external frame. The solar array mounting system includes flexible, pedestal-style feet and structural links connected in a grid formation on the mounting surface. The photovoltaic modules are secured in place via the use of attachment clamps that grip the edge of the typically glass substrate. The panel mounting clamps are then held in place by tilt brackets and/or mid-link brackets that provide fixation for the clamps and align the solar panels at a tilt to the horizontal mounting surface. The tilt brackets are held in place atop the flexible feet and connected link members thus creating a complete mounting structure.

Miros, Robert H. J.; Mittan, Margaret Birmingham; Seery, Martin N; Holland, Rodney H

2012-09-18T23:59:59.000Z

58

Photovoltaic module mounting system  

DOE Patents [OSTI]

A solar array mounting system having unique installation, load distribution, and grounding features, and which is adaptable for mounting solar panels having no external frame. The solar array mounting system includes flexible, pedestal-style feet and structural links connected in a grid formation on the mounting surface. The photovoltaic modules are secured in place via the use of attachment clamps that grip the edge of the typically glass substrate. The panel mounting clamps are then held in place by tilt brackets and/or mid-link brackets that provide fixation for the clamps and align the solar panels at a tilt to the horizontal mounting surface. The tilt brackets are held in place atop the flexible feet and connected link members thus creating a complete mounting structure.

Miros, Robert H. J. (Fairfax, CA); Mittan, Margaret Birmingham (Oakland, CA); Seery, Martin N. (San Rafael, CA); Holland, Rodney H. (Novato, CA)

2012-04-17T23:59:59.000Z

59

First Commercial, Grid-Connected, Hydrokinetic Tidal Energy Project...  

Office of Science (SC) Website

First Commercial, Grid-Connected, Hydrokinetic Tidal Energy Project in North America Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) SBIR...

60

Nevada Deploys First U.S. Commercial, Grid-Connected Enhanced Geothermal  

Broader source: Energy.gov (indexed) [DOE]

Nevada Deploys First U.S. Commercial, Grid-Connected Enhanced Nevada Deploys First U.S. Commercial, Grid-Connected Enhanced Geothermal System Nevada Deploys First U.S. Commercial, Grid-Connected Enhanced Geothermal System April 12, 2013 - 12:00pm Addthis WASHINGTON -- As part of the Obama Administration's all-of-the-above energy strategy, the Energy Department today recognized the nation's first commercial enhanced geothermal system (EGS) project to supply electricity to the grid. Based in Churchill County, Nevada, Ormat Technologies' Desert Peak 2 EGS project has increased power output of its nearby operating geothermal field by nearly 38 percent - providing an additional 1.7 megawatts of power to the grid and validating this emerging clean energy technology. "Developing America's vast renewable energy resources sustainably is an

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Building sustainable energy systems: Homeostatic control of grid-connected microgrids, as a means to reconcile power supply and energy demand response management  

Science Journals Connector (OSTI)

Abstract The issue of worldwide over consumption and squandering of electrical energy has resulted in what one might call an energy obesity problem in terms of energy intake and its expenditure. It is indeed something that must change if modern society is to become sustainable someday. This is to be realized in conjunction with adequate government policies and innovative strategies aimed at effectively integrating non-conventional renewable energies (NCRE), with thriftiness and energy efficiency (EE) – the three pillars of energy sustainability (ES) – in today?s electric power systems generation and distribution infrastructure. This ought to be done in a way that incorporates them jointly, as part of a comprehensive energy strategy to propitiate a wider penetration of distributed generation (DG) solutions. Departing from mainstream literature on the subject, this paper proposes such strategies for integrating hybrid micro-generation power systems to the grid through homeostatic control (HC), as a means to reconcile power supply and energy demand response management (EDRM). These strategies can be designed and implemented in the microgrid?s supervisory control system for the purpose of eliciting EE and thriftiness in consumers to build ES in the system. The theoretical model behind the HC strategies is presented and a numerical example is provided, using real electricity consumption data of a small rural community in Chile. Upon examining a particular set of criteria designed to control renewable power (RP) supply from a grid-tie microgrid to residential consumers, simulation results show that the model proves effective when testing such criteria for different power supply scenarios. Particularly revealing is the role of the energy storage system (ESS) – the energy buffer – in the HC strategies being proposed and the difference that it makes in eliciting thrifty, efficient energy consumption as a result of individual and collective efforts to ensure energy sustainability of the system as a whole.

Franco Fernando Yanine; Federico I. Caballero; Enzo E. Sauma; Felisa M. Córdova

2014-01-01T23:59:59.000Z

62

Application of fuzzy logic control algorithm as stator power controller of a grid-connected doubly-fed induction generator  

Science Journals Connector (OSTI)

This paper discusses the power outputs control of a grid-connected doubly-fed induction generator (DFIG) for a wind power generation systems. The DFIG structure control has a six diode rectifier ... order to cont...

Ridha Cheikh; Arezki Menacer; Said Drid; Mourad Tiar

2013-03-01T23:59:59.000Z

63

Photovoltaic Geographical Information System | Open Energy Information  

Open Energy Info (EERE)

Photovoltaic Geographical Information System Photovoltaic Geographical Information System Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Photovoltaic Geographical Information System Focus Area: Renewable Energy Topics: Opportunity Assessment & Screening Website: re.jrc.ec.europa.eu/pvgis/ Equivalent URI: cleanenergysolutions.org/content/photovoltaic-geographical-information Language: English Policies: Deployment Programs DeploymentPrograms: Demonstration & Implementation This tool provides a geographical inventory of solar energy resources and an assessment of the electricity generation from photovoltaic systems in Europe, Africa, and southwest Asia. The tools allows for analysis of the technical, environmental, and socio-economic factors of solar electricity generation. Users may access maps and posters generated using the tool, as

64

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

65

The Impact of Retail Rate Structures on the Economics of Commercial Photovoltaic Systems in California  

SciTech Connect (OSTI)

This article examines the impact of retail electricity rate design on the economic value of grid-connected photovoltaic (PV) systems, focusing on commercial customers in California. Using 15-minute interval building load and PV production data from a sample of 24 actual commercial PV installations, we compare the value of the bill savings across 20 commercial-customer retail electricity rates currently offered in the state. Across all combinations of customers and rates, we find that the annual bill savings from PV, per kWh generated, ranges from $0.05/kWh to $0.24/kWh. This sizable range in rate-reduction value reflects differences in rate structures, revenue requirements, the size of the PV system relative to building load, and customer load shape. The most significant rate design issue for the value of commercial PV is found to be the percentage of total utility bills recovered through demand charges, though a variety of other factors are also found to be of importance. The value of net metering is found to be substantial, but only when commercial PV systems represent a sizable portion of annual customer load. Though the analysis presented here is specific to California, our general results demonstrate the fundamental importance of retail rate design for the customer-economics of grid-connected, customer-sited PV.

Mills, Andrew; Wiser, Ryan; Barbose, Galen; Golove, William

2008-05-11T23:59:59.000Z

66

The impact of retail rate structures on the economics of commercial photovoltaic systems in California  

SciTech Connect (OSTI)

This article examines the impact of retail electricity rate design on the economic value of grid-connected photovoltaic (PV) systems, focusing on commercial customers in California. Using 15-min interval building load and PV production data from a sample of 24 actual commercial PV installations, we compare the value of the bill savings across 20 commercial-customer retail electricity rates currently offered in the state. Across all combinations of customers and rates, we find that the annual bill savings from PV, per kWh generated, ranges from $0.05 to $0.24/kWh. This sizable range in rate-reduction value reflects differences in rate structures, revenue requirements, the size of the PV system relative to building load, and customer load shape. The most significant rate design issue for the value of commercial PV is found to be the percentage of total utility bills recovered through demand charges, though a variety of other factors are also found to be of importance. The value of net metering is found to be substantial, but only when energy from commercial PV systems represents a sizable portion of annual customer load. Though the analysis presented here is specific to California, our general results demonstrate the fundamental importance of retail rate design for the customer-economics of grid-connected, customer-sited PV.

Mills, Andrew D.; Wiser, Ryan; Barbose, Galen; Golove, William

2008-06-24T23:59:59.000Z

67

The Impact of Retail Rate Structures on the Economics of Commercial Photovoltaic Systems in California  

Broader source: Energy.gov [DOE]

To achieve a sizable and self-sustaining market for grid-connected, customer-sited photovoltaic (PV) systems, solar will likely need to be competitive with retail electricity rates. In this report, we examine the impact of retail rate design on the economic value of commercial PV systems in California. Using 15-minute interval building load and PV production data from 24 actual commercial PV installations, we compare the value of the bill savings across 20 commercial customer retail rates currently offered in the state. We find that the specifics of the rate structure, combined with the characteristics of the customer’s underlying load and the size of the PV system, can have a substantial impact on the customer-economics of commercial PV systems.

68

Sustainable feasibility of solar photovoltaic powered street lighting systems  

Science Journals Connector (OSTI)

Abstract In the last few years, due to soaring fuel prices and gas emissions, renewable energy technologies have been suggested as the power source for infrastructures. The interest in solar photovoltaic (PV) assisted street lighting systems stems from the fact that they are sustainable and environmentally friendly compared to conventional energy powered systems. The present paper investigates and compares the economic feasibility of two types of systems: islanded and grid-connected system, for the street lighting systems in Hunan Province, China. Based on two options of solar panel materials, a simulation model of the system is developed for economic, technical and environmental feasibility. The comprehensively sustainability feasibility of these systems is conducted taking into account the cost, energy generation, CO2 emissions and renewable fraction. Radar plot is employed to integrate all the sustainability indicators into a general indicator, which presents system’s sustainability as a real number in the interval [0, 2]. Results show that for street lighting systems of all the cities, single crystal panel has a larger number of annual electricity generation, less emissions and higher environmental performance, but is more expansive than polycrystalline. It is also found that when the feed-in tariff higher than 1.27 CNY/kW h, the cost of energy (COE) of the solar powered lighting systems is less than a pure grid powered system. This will incite the use of solar PV in infrastructures. Through comparing the scores of sustainability, it is found that the Loudi system has the highest feasibility while the Yongzhou system has the lowest in the province.

Gang Liu

2014-01-01T23:59:59.000Z

69

Development of an economical model to determine an appropriate feed-in tariff for grid-connected solar PV electricity in all states of Australia  

Science Journals Connector (OSTI)

Australia is a country with a vast amount of natural resources including sun and wind. Australia lies between latitude of 10–45°S and longitude of 112–152°E, with a daily solar exposure of between less than 3 MJ/(m2 day) in winter and more than 30 MJ/(m2 day) in summer. Global solar radiation in Australia varies between minimum of 3285 MJ/(m2 year) in Hobart to 8760 MJ/(m2 year) in Northern Territory. As a result of this wide range of radiation level there will be a big difference between costs of solar PV electricity in different locations. A study we have recently conducted on the solar PV electricity price in all states of Australia. For this purpose we have developed an economical model and a computer simulation to determine the accurate unit price of grid-connected roof-top solar photovoltaic (PV) electricity in A$/kWh for all state of Australia. The benefit of this computer simulation is that we can accurately determine the most appropriate feed-in tariff of grid-connected solar PV energy system. The main objective of this paper is to present the results of this study. A further objective of this paper is to present the details of the unit price of solar PV electricity in the state of Victoria in each month and then to compare with electricity price from conventional power systems, which is currently applied to this state. The state Victoria is located south of Australia and in terms of sun radiation is second lowest compared with the other Australian states. The computer simulation developed for this study makes it possible to determine the cost of grid-connected solar PV electricity at any location in any country based on availability of average daily solar exposure of each month as well as economical factors of the country.

A. Zahedi

2009-01-01T23:59:59.000Z

70

Sandia National Laboratories: Photovoltaic Systems Evaluation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

can consistently perform over time, the DOE -in ... Second Annual Electric Power Research InstituteSandia Photovoltaic Systems Symposium On April 15, 2014, in...

71

Residential Photovoltaic Energy Systems in California: The Effect on Home Sales Prices  

E-Print Network [OSTI]

Residential Photovoltaic Energy Systems in California: Themarginal impacts of photovoltaic (PV) energy systems on home

Hoen, Ben

2014-01-01T23:59:59.000Z

72

Residential Photovoltaic Energy Systems in California: The Effect on Home Sales Prices  

E-Print Network [OSTI]

Residential Photovoltaic Energy Systems in California: Themarginal impacts of photovoltaic (PV) energy systems on home

Hoen, Ben

2013-01-01T23:59:59.000Z

73

Abstract--This paper deals with the design of a nonlinear con-troller for single-phase grid-connected photovoltaic (PV) systems  

E-Print Network [OSTI]

, and feed-in tariff [1], [2]. The major concerns of integrating PV into the grid are stochastic behaviors

Pota, Himanshu Roy

74

Grid-Connected Renewables Program | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Grid-Connected Renewables Program Grid-Connected Renewables Program Grid-Connected Renewables Program < Back Eligibility Commercial Industrial Institutional Local Government Nonprofit Schools State Government Savings Category Bioenergy Wind Buying & Making Electricity Maximum Rebate Not specified Program Info Funding Source New Jersey Societal Benefits Charge (public benefits fund) State New Jersey Program Type Performance-Based Incentive Rebate Amount Varies by project; solicitation lists recommended incentive levels 10-20% may be requested as an up-front grant Provider State of New Jersey Board of Public Utilities Note: The deadline for the most recent solicitation has passed and the information in this summary is specific to this closed program solicitation. The New Jersey Office of Clean Energy 2013-2014 Budget

75

Transatlantic Workshop on Electric Vehicles and Grid Connectivity |  

Broader source: Energy.gov (indexed) [DOE]

Transatlantic Workshop on Electric Vehicles and Grid Connectivity Transatlantic Workshop on Electric Vehicles and Grid Connectivity Transatlantic Workshop on Electric Vehicles and Grid Connectivity November 17, 2010 - 2:33pm Addthis On November 17, 2010, the United States and the European Union, under the auspices of the U.S.-EU Energy Council, invited equipment suppliers and manufacturers, utilities, policymakers, standards organizations, and government agencies to discuss mutually beneficial near-term actions to accelerate the introduction of electric vehicles to the market - with a particular focus on government policy and cooperative efforts to spur vehicle demonstration and deployment. For more information about the workshop, including participant presentations, click here. Addthis Related Articles Obama Administration Launches Competition for Three New Manufacturing

76

Technical and economical assessment of the utilization of photovoltaic systems in residential buildings: The case of Jordan  

Science Journals Connector (OSTI)

This paper studies the feasibility of utilizing photovoltaic systems in a standard residential apartment in Amman city in Jordan. Data on solar radiation, sunshine duration and the ambient temperature has been recorded in Amman city. An apartment in Amman was chosen as a case study to conduct energy and economic calculations. The electrical power needs and cost were calculated for the apartment. The component design and cost of PV system required to supply required energy was calculated and the payback period for the suggested stand-alone PV system in this paper was estimated in a constant inflation rate in electricity price similar to that of interest rate. The calculated payback period was high in a stand-alone system, to decrease payback period a grid-connected PV system is suggested. Considering an annual increase of 3% in electricity price, 15% of payback period was decreased in a stand-alone PV system and 21% in a grid-connected PV system. The output results of this study show that installation of PV system in a residential flat in Jordan may not be economically rewarding owing to the high cost of PV system compared to the cost of grid electricity. A feed-in tariff law of solar electricity may help to reduce PV system cost like the case of Germany. Additional conclusions are PV systems may be economically rewarding in Jordan if applied in locations far from electrical grid or in remote large scale PV power installations to overcome economical limitations of PV technology.

A. Al-Salaymeh; Z. Al-Hamamre; F. Sharaf; M.R. Abdelkader

2010-01-01T23:59:59.000Z

77

Assessing the Reliability and Economics of Wide-Scale Grid-Connected  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Assessing the Reliability and Economics of Wide-Scale Grid-Connected Assessing the Reliability and Economics of Wide-Scale Grid-Connected Distributed Energy Generation with Application to Electric Power Systems Under Stress Speaker(s): Hisham Zerriffi Date: November 13, 2003 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Kristina LaCommare Electric power systems can be disrupted due to a variety of stress circumstances. These can range from constraints on the physical infrastructure as a result of under-capacity problems to deliberate attacks in times of conflict. Stress conditions can manifest themselves in a variety of ways and determining both the nature of the stress and the best mathematical representation of that stress in the model is complicated. This talk details a quantitative comparison of the reliability of an

78

Control of offshore marine substation for grid-connection of a wave power farm  

Science Journals Connector (OSTI)

Abstract To grid-connect an offshore wave power farm, an intermediate marine substation is suggested. As a part of the Uppsala University wave power project, a marine substation has been designed, assembled and deployed at sea. The substation is capable of connecting up to seven wave energy converters (WECs), and to transfer the power to the onshore 1 kV-grid. In this article, the control procedure for grid connection of the \\{WECs\\} is described step-by-step, and the practical implementations are presented. The system is designed with autonomous control and will connect or disconnect the WECs, depending on the sea state. Fault handling is taken into account, and grid power quality such as harmonic distortion and flicker are considered in the design. Experimental results are presented to verify the system functionalities.

Rickard Ekström; Mats Leijon

2014-01-01T23:59:59.000Z

79

Concentrator Photovoltaic System Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Concentrator Photovoltaic System Basics Concentrator Photovoltaic System Basics Concentrator Photovoltaic System Basics August 20, 2013 - 4:12pm Addthis Concentrator photovoltaic (PV) systems use less solar cell material than other PV systems. PV cells are the most expensive components of a PV system, on a per-area basis. A concentrator makes use of relatively inexpensive materials such as plastic lenses and metal housings to capture the solar energy shining on a fairly large area and focus that energy onto a smaller area-the solar cell. One measure of the effectiveness of this approach is the concentration ratio-in other words, how much concentration the cell is receiving. Concentrator PV systems have several advantages over flat-plate systems. First, concentrator systems reduce the size or number of cells needed and

80

Tracking the Sun: The Installed Cost of Photovoltaics in the U.S. from  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sun: The Installed Cost of Photovoltaics in the U.S. from Sun: The Installed Cost of Photovoltaics in the U.S. from 1998-2007 Title Tracking the Sun: The Installed Cost of Photovoltaics in the U.S. from 1998-2007 Publication Type Report Refereed Designation Unknown Year of Publication 2009 Authors Wiser, Ryan H., Galen L. Barbose, and Carla Peterman Pagination 42 Date Published 02/2009 Publisher LBNL City Berkeley Keywords electricity markets and policy group, energy analysis and environmental impacts department, photovoltaics, power system economics, renewable energy Abstract As installations of grid-connected solar photovoltaic (PV) systems have grown, so too has the desire to track the installed cost of these systems over time, by system characteristics, by system location, and by component. This report helps to fill this need by summarizing trends in the installed cost of grid-connected PV systems in the United States from 1998 through 2007. The report is based on an analysis of installed cost data from nearly 37,000 residential and non-residential PV systems, totaling 363 MW of capacity, and representing 76% of all grid-connected PV capacity installed in the U.S. through 2007.

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Future contingencies and photovoltaic system worth  

SciTech Connect (OSTI)

The value of dispersed photovoltaic systems connected to the utility grid has been calculated using the General Electric Optimized Generation Planning program. The 1986 to 2001 time period was used for this study. Photovoltaic systems were dynamically integrated, up to 5% total capacity, into 9 NERC based regions under a range of future fuel and economic contingencies. Value was determined by the change in revenue requirements due to the photovoltaic additions. Displacement of high cost fuel was paramount to value, while capacity displacement was highly variable and dependent upon regional fuel mix.

Jones, G. J.; Thomas, M. G.; Bonk, G. J.

1982-01-01T23:59:59.000Z

82

Tracking the Sun III The Installed Cost of Photovoltaics in the U.S. from  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tracking the Sun III The Installed Cost of Photovoltaics in the U.S. from Tracking the Sun III The Installed Cost of Photovoltaics in the U.S. from 1998-2009 Title Tracking the Sun III The Installed Cost of Photovoltaics in the U.S. from 1998-2009 Publication Type Report Refereed Designation Unknown Year of Publication 2010 Authors Barbose, Galen L., NaĂŻm Darghouth, and Ryan H. Wiser Pagination 54 Date Published 12/2010 Publisher LBNL City Berkeley Keywords distributed energy resources (der), electricity markets and policy group, energy analysis and environmental impacts department, energy markets, photovoltaics Abstract As the deployment of grid-connected solar photovoltaic (PV) systems has increased, so too has the desire to track the installed cost of these systems over time and by location, customer type, system characteristics, and component. This report helps to fill this need by summarizing trends in the installed cost1 of grid-connected PV systems in the United States from 1998 through 2009 (updating two previous reports with data through 2007 and 2008, respectively), and providing preliminary cost trends for systems installed in 2010. The analysis is based on installed cost data for approximately 78,000 residential and non-residential PV systems, totaling 874 megawatts (MW) and representing 70% of all grid-connected PV capacity installed in the United States through 2009.

83

Tracking the Sun II The Installed Cost of Photovoltaics in the U.S. from  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tracking the Sun II The Installed Cost of Photovoltaics in the U.S. from Tracking the Sun II The Installed Cost of Photovoltaics in the U.S. from 1998-2008 Title Tracking the Sun II The Installed Cost of Photovoltaics in the U.S. from 1998-2008 Publication Type Report Refereed Designation Unknown Year of Publication 2009 Authors Wiser, Ryan H., Galen L. Barbose, Carla Peterman, and NaĂŻm Darghouth Pagination 150 Date Published 10/2009 Publisher LBNL City Berkeley Keywords electricity markets and policy group, energy analysis and environmental impacts department, photovoltaics, power system economics, renewable energy Abstract As the deployment of grid-connected solar photovoltaic (PV) systems has increased, so too has the desire to track the installed cost of these systems over time and by location, customer type, system characteristics, and component. This report helps to fill this need by summarizing trends in the installed cost of grid-connected PV systems in the United States from 1998 through 2008 (updating a previous report with data through 2007). The analysis is based on installed cost data from more than 52,000 residential and non-residential PV systems, totaling 566 MW and representing 71% of all grid-connected PV capacity installed in the U.S. through 2008.

84

Grid-Connected Renewable Energy Generation Toolkit-Biomass | Open Energy  

Open Energy Info (EERE)

Grid-Connected Renewable Energy Generation Toolkit-Biomass Grid-Connected Renewable Energy Generation Toolkit-Biomass Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Grid-Connected Renewable Energy Generation Toolkit-Biomass Agency/Company /Organization: United States Agency for International Development Sector: Energy Focus Area: Biomass Resource Type: Training materials Website: www.energytoolbox.org/gcre/mod_2/index.shtml#update Grid-Connected Renewable Energy Generation Toolkit-Biomass Screenshot References: Grid-Connected Renewable Energy-Biomass[1] Logo: Grid-Connected Renewable Energy Generation Toolkit-Biomass Biomass Toolkit References ↑ "Grid-Connected Renewable Energy-Biomass" Retrieved from "http://en.openei.org/w/index.php?title=Grid-Connected_Renewable_Energy_Generation_Toolkit-Biomass&oldid=375080

85

Grid-Connected Renewable Energy Generation Toolkit-Wind | Open Energy  

Open Energy Info (EERE)

Grid-Connected Renewable Energy Generation Toolkit-Wind Grid-Connected Renewable Energy Generation Toolkit-Wind Jump to: navigation, search Tool Summary Name: Grid-Connected Renewable Energy Generation Toolkit-Wind Agency/Company /Organization: United States Agency for International Development Sector: Energy Focus Area: Wind Resource Type: Training materials Website: www.energytoolbox.org/gcre/mod_6/index.shtml Grid-Connected Renewable Energy Generation Toolkit-Wind Screenshot References: Grid-Connected Renewable Energy Generation Toolkit-Wind[1] Logo: Grid-Connected Renewable Energy Generation Toolkit-Wind GCREwind.JPG References ↑ "Grid-Connected Renewable Energy Generation Toolkit-Wind" Retrieved from "http://en.openei.org/w/index.php?title=Grid-Connected_Renewable_Energy_Generation_Toolkit-Wind&oldid=375084"

86

Grid-Connected Renewable Energy Generation Toolkit-Solar | Open Energy  

Open Energy Info (EERE)

Grid-Connected Renewable Energy Generation Toolkit-Solar Grid-Connected Renewable Energy Generation Toolkit-Solar Jump to: navigation, search Tool Summary Name: Grid-Connected Renewable Energy Generation Toolkit-Solar Agency/Company /Organization: United States Agency for International Development Sector: Energy Focus Area: Solar Resource Type: Training materials Website: www.energytoolbox.org/gcre/mod_5/index.shtml Grid-Connected Renewable Energy Generation Toolkit-Solar Screenshot References: Grid-Connected Renewable Energy Generation Toolkit-Solar[1] Logo: Grid-Connected Renewable Energy Generation Toolkit-Solar GCREsolar.JPG References ↑ "Grid-Connected Renewable Energy Generation Toolkit-Solar" Retrieved from "http://en.openei.org/w/index.php?title=Grid-Connected_Renewable_Energy_Generation_Toolkit-Solar&oldid=375083

87

DOE Publishes Notice of Public Meeting for Smart Grid-connected...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

for Smart Grid-connected Buildings DOE Publishes Notice of Public Meeting for Smart Grid-connected Buildings April 8, 2014 - 9:30am Addthis DOE has published a notice of public...

88

An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California  

E-Print Network [OSTI]

Effects of Residential Photovoltaic Energy Systems on HomeEffects of Residential Photovoltaic Energy Systems on Homewith existing photovoltaic (PV) energy systems have sold in

Hoen, Ben

2011-01-01T23:59:59.000Z

89

Do Photovoltaic Energy Systems Effect Residential Selling Prices? Results from a California Statewide Investigation.  

E-Print Network [OSTI]

DO PHOTOVOLTAIC ENERGY SYSTEMS AFFECT RESIDENTIAL SELLINGopportunity employer. DO PHOTOVOLTAIC ENERGY SYSTEMS AFFECThave sold with photovoltaic (PV) energy systems installed at

Hoen, Ben

2012-01-01T23:59:59.000Z

90

An Analysis of the Effects of Photovoltaic Energy Systems on Residential Selling Prices in California.  

E-Print Network [OSTI]

Effects of Residential Photovoltaic Energy Systems on Homewith existing photovoltaic (PV) energy systems have sold ingrid-connected solar photovoltaic (PV) energy systems were

Cappers, Peter

2012-01-01T23:59:59.000Z

91

Aalborg Universitet Frequency Adaptive Selective Harmonic Control for Grid-Connected Inverters  

E-Print Network [OSTI]

Aalborg Universitet Frequency Adaptive Selective Harmonic Control for Grid-Connected Inverters Yang Harmonic Control for Grid-Connected Inverters. IEEE Transactions on Power Electronics, 1-13. 10.1109/TPEL Selective Harmonic Control for Grid-Connected Inverters Yongheng Yang, Student Member, IEEE, Keliang Zhou

Berning, Torsten

92

Advanced Photovoltaic Inverter Functionality using 500 kW Power Hardware-in-Loop Complete System Laboratory Testing: Preprint  

SciTech Connect (OSTI)

With the increasing penetration of distribution connected photovoltaic (PV) systems, more and more PV developers and utilities are interested in easing future PV interconnection concerns by mitigating some of the impacts of PV integration using advanced PV inverter controls and functions. This paper describes the testing of a 500 kW PV inverter using Power Hardware-in-Loop (PHIL) testing techniques. The test setup is described and the results from testing the inverter in advanced functionality modes, not commonly used in currently interconnected PV systems, are presented. PV inverter operation under PHIL evaluation that emulated both the DC PV array connection and the AC distribution level grid connection are shown for constant power factor (PF) and constant reactive power (VAr) control modes. The evaluation of these modes was completed under varying degrees of modeled PV variability.

Mather, B. A.; Kromer, M. A.; Casey, L.

2013-01-01T23:59:59.000Z

93

Photovoltaic System Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

System Basics System Basics Photovoltaic System Basics August 20, 2013 - 4:00pm Addthis A photovoltaic (PV), or solar electric system, is made up of several photovoltaic solar cells. An individual PV cell is usually small, typically producing about 1 or 2 watts of power. To boost the power output of PV cells, they are connected together to form larger units called modules. Modules, in turn, can be connected to form even larger units called arrays, which can be interconnected to produce more power, and so on. In this way, PV systems can be built to meet almost any electric power need, small or large. Illustration of solar cells combined to make a module and modules combined to make an array. The basic PV or solar cell produces only a small amount of power. To produce more power, cells can be interconnected to

94

Effects of surroundings snow coverage and solar tracking on photovoltaic systems operating in Canada  

Science Journals Connector (OSTI)

This paper deals with demonstrating the energy performance of solar tracking photovoltaic (PV) systems in Canada. In this study a grid connected stand-alone PV system has been designed and coupled with four different tracking systems: fixed horizontal fixed tilted single-axis tracking and dual-axis tracking. The performance analysis of the systems focuses on the variation of array irradiance electricity generation and efficiency without considerations for economic impacts at this stage. The simulation results show that the dual-axis tracking array provides the best performance over a year. It receives 33% more solar radiation and generates 36% more electricity than the tilted system. On clear winter days compared to the tilted system the dual-axis tracking system produces 32% and 29% more electricity in high albedo and low albedo conditions respectively. High albedo due to surroundings snow coverage has been found to cause an increase of 3.1% 5.8% and 7.9% in electricity production of the tilted single-axis tracking and dual-axis tracking system respectively over a winter. The results of this research support the idea that tracking the sun is effective on clear days and could be counterproductive on overcast days. Therefore in high albedo conditions it is recommended to track the sun and stay fixed once the sky becomes overcast.

Mostafa Mehrtash; Daniel R. Rousse; Guillermo Quesada

2013-01-01T23:59:59.000Z

95

Producer-Focused Life Cycle Assessment of Thin-Film Silicon Photovoltaic Systems  

E-Print Network [OSTI]

21st European Photovoltaic Solar Energy Conference, Dresden,21st European Photovoltaic Solar Energy Conference, Dresden,International Energy Agency Photovoltaic Power System

Zhang, Teresa Weirui

2011-01-01T23:59:59.000Z

96

Photovoltaic Systems Interconnected onto Secondary Network Distribution Systems – Success Stories  

Broader source: Energy.gov [DOE]

This report examines six case studies of photovoltaic (PV) systems integrated into secondary network systems. The six PV systems were chosen for evaluation because they are interconnected to secondary network systems located in four major Solar America Cities.

97

Photovoltaic System Performance Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

System Performance Basics System Performance Basics Photovoltaic System Performance Basics August 20, 2013 - 4:17pm Addthis Photovoltaic (PV) systems are usually composed of numerous solar arrays, which in turn, are composed of numerous PV cells. The performance of the system is therefore dependent on the performance of its components. Reliability The reliability of PV arrays is an important factor in the cost of PV systems and in consumer acceptance. However, the building blocks of arrays, PV cells, are considered "solid-state" devices with no moving parts and, therefore, are highly reliable and long-lived. Therefore, reliability measurements of PV systems are usually focused not on cells but on modules and whole systems. Reliability can be improved through fault-tolerant circuit design, which

98

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

99

Robust iterative learning control of single-phase grid-connected inverter  

Science Journals Connector (OSTI)

For the single phase inductance-capacitance-inductance (LCL) grid-connected inverter in micro-grid, a kind of robust iterative learning controller...

Zhong-Qiang Wu; Chun-Hua Xu; Yang Yang

2014-08-01T23:59:59.000Z

100

Photovoltaic Pumping Systems A Comparison of Two Concepts  

E-Print Network [OSTI]

Photovoltaic Pumping Systems A Comparison of Two Concepts Hans Bloos, Markus Genthner, Detlev of Oldenburg two different concepts of photovoltaic pumping subsystems available on the market were Photovoltaic pumping (PVP) has established itself as a water lifting technique for remote areas in sun

Heinemann, Detlev

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Introduction to Small-Scale Photovoltaic Systems (Including RETScreen Case  

Open Energy Info (EERE)

Introduction to Small-Scale Photovoltaic Systems (Including RETScreen Case Introduction to Small-Scale Photovoltaic Systems (Including RETScreen Case Study) (Webinar) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Introduction to Small-Scale Photovoltaic Systems (Including RETScreen Case Study) (Webinar) Focus Area: Solar Topics: Market Analysis Website: www.leonardo-energy.org/webinar-introduction-small-scale-photovoltaic- Equivalent URI: cleanenergysolutions.org/content/introduction-small-scale-photovoltaic Language: English Policies: Deployment Programs DeploymentPrograms: Project Development This video teaches the viewer about photovoltaic arrays and RETscreen's photovoltaic module, which can be used to project the cost and production of an array. An example case study was

102

DOE Publishes Notice of Public Meeting for Smart Grid-connected Buildings  

Broader source: Energy.gov [DOE]

The physical characterization of smart and grid-connected commercial and residential buildings end-use equipment and appliances, including but not limited to processes and metrics for measurement, identification of grid and building services, and identification of values and benefits of grid connectivity.

103

Power control of a wind farm with active stall wind turbines and AC grid connection  

E-Print Network [OSTI]

Power control of a wind farm with active stall wind turbines and AC grid connection Anca D. Hansen1 controller for a wind farm made-up exclusively of active stall wind turbines with AC grid connection wind farm control involves both the control on wind turbine level as well as the central control

104

Modeling and Grid impedance Variation Analysis of Parallel Connected Grid Connected Inverter  

E-Print Network [OSTI]

Modeling and Grid impedance Variation Analysis of Parallel Connected Grid Connected Inverter based - This paper addresses the harmonic compensation error problem existing with parallel connected inverter grid connected inverter, it is found that multiple parallel connected inverters and grid impedance can

Bak, Claus Leth

105

Design of a Robust Digital Current Controller for a Grid Connected Interleaved Inverter  

E-Print Network [OSTI]

Design of a Robust Digital Current Controller for a Grid Connected Interleaved Inverter M. A for a three- phase voltage source grid-connected interleaved inverter. Each phase consists of 6 half small output filter capacitors are required which provide high impedance to grid voltage harmonics

106

Chile-GTZ Public Properties for Grid-connected Renewable Energy Projects |  

Open Energy Info (EERE)

Properties for Grid-connected Renewable Energy Projects Properties for Grid-connected Renewable Energy Projects Jump to: navigation, search Logo: Chile-GTZ Public Properties for Grid-connected Renewable Energy Projects Name Chile-GTZ Public Properties for Grid-connected Renewable Energy Projects Agency/Company /Organization GTZ on behalf of the German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU) Sector Energy Topics Background analysis Website http://www.gtz.de/en/themen/27 Program Start 2008 Program End 2011 Country Chile UN Region Latin America and the Caribbean References Public Properties for Grid-connected Renewable Energy Projects[1] GTZ is working with Chile with the following objective: "Sites on state-owned properties are identified, assessed and marketed to enable the

107

Standards Development Australia & IEC (2003) Page 1 Current state of play with Australian and IEC standards for PV & RE Systems  

E-Print Network [OSTI]

of photovoltaic (PV) arrays (New draft 2003) o AS 4509.1-1999 Stand-alone power systems - Safety requirements o development process is illustrated with a timeline for the development of our grid connected inverter standard AS 4509.2-2002 Stand-alone power systems - System design guidelines o AS 4509.3-1999 Stand-alone power

108

Design and simulation of a small scale solar powered desalination system  

Science Journals Connector (OSTI)

This study presents a design for a solar photovoltaic powered, small-scale desalination system suitable for implementation in remote or water starved areas where a grid connection is not possible or feasible. The desalination method and solar array of ... Keywords: Simulink, desalination, design and simulation, performance prediction, solar power

J. R. Schrader; M. G. Rasul

2008-02-01T23:59:59.000Z

109

Maine Deploys First U.S. Commercial, Grid-Connected Tidal Energy Project |  

Broader source: Energy.gov (indexed) [DOE]

Maine Deploys First U.S. Commercial, Grid-Connected Tidal Energy Maine Deploys First U.S. Commercial, Grid-Connected Tidal Energy Project Maine Deploys First U.S. Commercial, Grid-Connected Tidal Energy Project July 24, 2012 - 1:12pm Addthis NEWS MEDIA CONTACT (202) 586-4940 WASHINGTON -- Today, Energy Secretary Steven Chu recognized the nation's first commercial, grid-connected tidal energy project off the coast of Eastport, Maine. Leveraging a $10 million investment from the Energy Department, Ocean Renewable Power Company (ORPC) will deploy its first commercial tidal energy device into Cobscook Bay this summer. The project, which injected $14 million into the local economy and has supported more than 100 local and supply chain jobs, represents the first tidal energy project in the United States with long-term contracts to sell electricity

110

Mongolia-GTZ Energy Efficiency within the Grid-Connected Energy Supply |  

Open Energy Info (EERE)

within the Grid-Connected Energy Supply within the Grid-Connected Energy Supply Jump to: navigation, search Logo: Mongolia-GTZ Energy Efficiency within the Grid-Connected Energy Supply Name Mongolia-GTZ Energy Efficiency within the Grid-Connected Energy Supply Agency/Company /Organization Deutsche Gesellschaft fĂĽr Internationale Zusammenarbeit (GIZ) GmbH Partner German Federal Ministry for Economic Cooperation and Development (BMZ), Ministry of Fuel and Energy (MoFE) Sector Energy Topics Background analysis, Policies/deployment programs Website http://www.gtz.de/en/praxis/95 Program Start 2007 Program End 2010 Country Mongolia Eastern Asia References GTZ projects [1] GTZ is working with Mongolia on energy efficiency capacity development for institutions and the private sector. References

111

Robust control based on the Lyapunov theory of a grid-connected doubly fed induction generator  

Science Journals Connector (OSTI)

This paper discusses the robust control of a grid-connected doubly-fed induction generator (DFIG) controlled by vector control using a nonlinear ... , in which an optimal operation of the DFIG in subsynchronous o...

Ridha Cheikh; Arezki Menacer; Said Drid

2013-06-01T23:59:59.000Z

112

Maine Project Launches First Grid-Connected Offshore Wind Turbine in the  

Broader source: Energy.gov (indexed) [DOE]

Maine Project Launches First Grid-Connected Offshore Wind Turbine Maine Project Launches First Grid-Connected Offshore Wind Turbine in the U.S. Maine Project Launches First Grid-Connected Offshore Wind Turbine in the U.S. May 31, 2013 - 11:00am Addthis News Media Contact (202) 586-4940 WASHINGTON - The Energy Department today recognized the nation's first grid-connected offshore floating wind turbine prototype off the coast of Castine, Maine. Led by the University of Maine, this project represents the first concrete-composite floating platform wind turbine to be deployed in the world - strengthening American leadership in innovative clean energy technologies that diversify the nation's energy mix with more clean, domestic energy sources. "Developing America's vast renewable energy resources is an important part of the Energy Department's all-of-the-above strategy to pave the way

113

Understanding Variability and Uncertainty of Photovoltaics for Integration with the Electric Power System  

E-Print Network [OSTI]

area of photovoltaic and other clean energy technologies.Energy recently hosted a day-long public workshop on the variability of photovoltaic (photovoltaic power plants into the utility system. Nicholas Miller is Director, Energy

Mills, Andrew

2010-01-01T23:59:59.000Z

114

Sandia National Laboratories: Photovoltaic Systems Evaluation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Laboratory (PSEL) Sandia-Electric Power Research Institute Partnership Publishes Photovoltaic Reliability Report On January 21, 2014, in Energy, Facilities, Grid Integration,...

115

Sandia National Laboratories: Photovoltaic Systems Research ...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Photovoltaics Engine Test Facility Central Receiver Test Facility Power Towers for Utilities Solar Furnace Dish Test Facility Optics Lab Parabolic Dishes Work For Others...

116

Evaluating Future Standards and Codes with a Focus on High Penetration Photovoltaic (HPPV) System Deployment (Poster)  

SciTech Connect (OSTI)

Poster displaying solutions for evaluating future standards and codes for high penetration photovoltaic (HPPV) systems.

Coddington, M.; Kroposki, B.; Basso, T.; Lynn, K.

2010-12-01T23:59:59.000Z

117

Operational results from the Saudi Solar Village Photovoltaic power system  

SciTech Connect (OSTI)

The world's largest photovoltaic power system was carried into the operation phase a few months ago. This system was developed and fabricated in the United States and it is providing electrical energy to three remote villages in Saudi Arabia. The facility includes a 350 kW photovoltaic array, 1-MW diesel powered generator, 1100 kWH lead acid batteries, a 300 KVA inverter and a solar weather data monitoring station. The photovoltaic power system is capable of completely automatic operation. It is designed to operate in stand-alone and cogeneration modes of operation.

Huraib, F.; Al-Sani, A.; Khoshami, B.H.

1982-08-01T23:59:59.000Z

118

Optimum wind- and photovoltaic-based stand-alone systems on the basis of life cycle energy analysis  

Science Journals Connector (OSTI)

The main aim of the specific research is the comparison of the energy pay-back period of optimum renewable energy sources (RES)-based configurations, meaning wind-battery and photovoltaic-battery stand-alone installations that may ensure the energy autonomy of a typical remote consumer under the condition of minimum life cycle (LC) energy content. In this context, energy autonomy is first ensured on the basis of an appropriate sizing methodology, while accordingly, by developing a calculation algorithm for the estimation of the LC energy content of such energy autonomous systems, minimum LC embodied energy configurations are eventually obtained. On top of that, three representative areas are examined so as to investigate the influence of the local wind and solar potential. According to the results, the sustainable character of both RES-based solutions is designated, especially when comparison with the conventional diesel-engine solution is carried out. On the other hand, the situation is inversed when comparing stand-alone and grid-connected RES systems of the same size, with significant contribution of the battery storage component being reflected.

J.K. Kaldellis; D. Zafirakis; V. Stavropoulou; El. Kaldelli

2012-01-01T23:59:59.000Z

119

Long-term stabilisation of grid connected wind farms with FACTS controllers  

Science Journals Connector (OSTI)

The increasing power demand has led to the growth of new technologies that play an integral role in shaping the future energy market. Keeping in view of the environmental constraints, grid connected wind turbines are promising in increasing system reliability. This paper presents the impact of FACTS controllers on the long-term dynamic stability of power systems connected with wind farms based on doubly fed induction generator systems. The stability assessment is made first for a three-phase short circuit without the FACTS controllers in the power network and then with the FACTS controllers. The long-term dynamic simulation results yield information on: 1) the impact of faults and slow wind speed changes on the performance of wind driven induction generators; 2) the change in controllable parameters of the FACTS controllers following the faults and wind speed changes; 3) transient reactive power ratings of FACTS controllers for enhancement of rotor speed stability of induction generators and angle stability of synchronous generators.

N. Senthil Kumar; M. Abdullah Khan

2010-01-01T23:59:59.000Z

120

Mandatory Photovoltaic System Cost Estimate | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Mandatory Photovoltaic System Cost Estimate Mandatory Photovoltaic System Cost Estimate Mandatory Photovoltaic System Cost Estimate < Back Eligibility Utility Savings Category Solar Buying & Making Electricity Program Info State Colorado Program Type Line Extension Analysis Provider Colorado Public Utilities Commission At the request of a customer or a potential customer, Colorado electric utilities are required to conduct a cost comparison of a photovoltaic (PV) system to any proposed distribution line extension if the customer or potential customer provides the utility with load data (estimated monthly kilowatt-hour usage) requested by the utility to conduct the comparison, and if the customer's or potential customer's peak demand is estimated to be less than 25 kilowatts (kW). In performing the comparison analysis, the

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Energy dispatch schedule optimization for demand charge reduction using a photovoltaic-battery storage system with solar forecasting  

Science Journals Connector (OSTI)

Abstract A battery storage dispatch strategy that optimizes demand charge reduction in real-time was developed and the discharge of battery storage devices in a grid-connected, combined photovoltaic-battery storage system (PV+ system) was simulated for a summer month, July 2012, and a winter month, November 2012, in an operational environment. The problem is formulated as a linear programming (LP; or linear optimization) routine and daily minimization of peak non-coincident demand is sought to evaluate the robustness, reliability, and consistency of the battery dispatch algorithm. The LP routine leverages solar power and load forecasts to establish a load demand target (i.e., a minimum threshold to which demand can be reduced using a photovoltaic (PV) array and battery array) that is adjusted throughout the day in response to forecast error. The LP routine perfectly minimizes demand charge but forecasts errors necessitate adjustments to the perfect dispatch schedule. The PV+ system consistently reduced non-coincident demand on a metered load that has an elevated diurnal (i.e., daytime) peak. The average reduction in peak demand on weekdays (days that contain the elevated load peak) was 25.6% in July and 20.5% in November. By itself, the PV array (excluding the battery array) reduced the peak demand on average 19.6% in July and 11.4% in November. PV alone cannot perfectly mitigate load spikes due to inherent variability; the inclusion of a storage device reduced the peak demand a further 6.0% in July and 9.3% in November. Circumstances affecting algorithm robustness and peak reduction reliability are discussed.

R. Hanna; J. Kleissl; A. Nottrott; M. Ferry

2014-01-01T23:59:59.000Z

122

Flat-Plate Photovoltaic System Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Flat-Plate Photovoltaic System Basics Flat-Plate Photovoltaic System Basics Flat-Plate Photovoltaic System Basics August 20, 2013 - 4:03pm Addthis The most common photovoltaic (PV) array design uses flat-plate PV modules or panels. These panels can be fixed in place or allowed to track the movement of the Illustration of a cutaway of a typical flat-plate module. The layers, in order from top to bottom, are: cover film, solar cell, encapsulant, substrate, cover film, seal, gasket, and frame. One typical flat-plate module design uses a substrate of metal, glass, or plastic to provide structural support in the back; an encapsulant material to protect the cells; and a transparent cover of plastic or glass. sun. They respond to sunlight that is direct or diffuse. Even in clear skies, the diffuse component of sunlight accounts for between 10% and 20%

123

A $5 Million Boost for Midsize Wind Turbines and Grid Connectivity |  

Broader source: Energy.gov (indexed) [DOE]

A $5 Million Boost for Midsize Wind Turbines and Grid Connectivity A $5 Million Boost for Midsize Wind Turbines and Grid Connectivity A $5 Million Boost for Midsize Wind Turbines and Grid Connectivity September 14, 2010 - 10:52am Addthis Niketa Kumar Niketa Kumar Public Affairs Specialist, Office of Public Affairs What does this mean for me? With better forecasting, utilities can more reliably connect variable power sources such as wind energy with electricity grids, and can decrease their need for back-up energy sources such as natural gas and hydropower. Last week's Geek-Up talked about the Energy Department's Wind for Schools program and how it is helping schools use wind turbines to power their classrooms. Yesterday, U.S. Energy Secretary Steven Chu announced more than $5 million in funding to help bring wind-generated power to not only more

124

Simulation and simplified design studies of photovoltaic systems  

SciTech Connect (OSTI)

Results of TRNSYS simulations of photovoltaic systems with electrical storage are described. Studies of the sensitivity of system performance, in terms of the fraction of the electrical load supplied by the solar energy system, to variables such as array size, battery size, location, time of year, and load shape are reported. An accurate simplified method for predicting array output of max-power photovoltaic systems is presented. A second simplified method, which estimates the overall performance of max-power systems, is developed. Finally, a preliminary technique for predicting clamped-voltage system performance is discussed.

Evans, D.L.; Facinelli, W.A.; Koehler, L.P.

1980-09-01T23:59:59.000Z

125

Analysis of the Potential Applications of Solar Termal and Photovoltaic Systems for Northwest Vista College  

E-Print Network [OSTI]

the following RE technologies as viable: ground source heat pump (GSHP) systems, closed loop solar thermal system and photovoltaic (PV)....

Ugursal, A.; Martinez, J.; Baltazar, J. C.; Zilbershtein, G.

2013-01-01T23:59:59.000Z

126

Sandia National Laboratories: photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Guides New Photovoltaic Requirements On January 8, 2013, in Energy, News, News & Events, Photovoltaic, Renewable Energy, Solar, Systems Analysis Sandia's Photovoltaic (PV)...

127

El Paso Electric photovoltaic-system analyses  

SciTech Connect (OSTI)

Four analyses were performed on the Newman Power Station PV system. Two were performed using the Photovoltaic Transient Analysis Program (PV-TAP) and two with the SOLCEL II code. The first was to determine the optimum tilt angle for the array and the sensitivity of the annual energy production to variation in tilt angle. The optimum tilt angle was found to be 28/sup 0/, and variations of 2/sup 0/ produce losses of only 0.06% in the annual energy production. The second analysis assesses the power loss due to cell-to-cell variations in short circuit current and the degree of improvement attainable by sorting cells and matching modules. Typical distributions on short circuit current can cause losses of about 9.5 to 11 percent in peak array power, and sorting cells into 4 bins prior to module assembly can reduce the losses to about 6 to 8 percent. Using modules from the same cell bins in building series strings can reduce the losses to about 4.5 to 6 percent. Results are nearly the same if the array is operated at a fixed votage. The third study quantifies the magnitude and frequency of occurrence of high cell temperatures due to reverse bias caused by shadowing, and it demonstrates that cell temperatures achieved in reverse bias are higher for cells with larger shunt resistance. The last study assesses the adequacy of transient protection devices on the dc power lines to transients produced by array switching and lightning. Large surge capacitors on the dc power line effectively limit voltage excursions at the array and at the control room due to lightning. Without insertion of series resistors, the current may be limited only by cable and switch impedances, and all elements could be severely stressed. (LEW)

Not Available

1982-05-01T23:59:59.000Z

128

Models Used to Assess the Performance of Photovoltaic Systems  

Broader source: Energy.gov [DOE]

This report documents the various photovoltaic (PV) performance models and software developed and utilized by researchers at Sandia National Laboratories (SNL) in support of the Photovoltaics and Grid Integration Department. In addition to PV performance models, hybrid system and battery storage models are discussed. A hybrid system using other distributed sources and energy storage can help reduce the variability inherent in PV generation, and due to the complexity of combining multiple generation sources and system loads, these models are invaluable for system design and optimization.

129

Next-Generation Distributed Power Management for Photovoltaic Systems  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Next-Generation Distributed Power Management for Photovoltaic Systems Next-Generation Distributed Power Management for Photovoltaic Systems Speaker(s): Jason Stauth Date: July 29, 2011 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Steven Lanzisera In recent years, the balance of systems (BOS) side of photovoltaic (PV) energy has become a major focus in the effort to drive solar energy towards grid parity. The power management architecture has expanded to include a range of distributed solutions, including microinverters and 'micro' DC-DC converters to solve problems with mismatch (shading), expand networking and control, and solve critical BOS issues such as fire safety. This talk will introduce traditional and distributed approaches for PV systems, and will propose a next-generation architecture based on a new

130

A stochastic method for stand-alone photovoltaic system sizing  

SciTech Connect (OSTI)

Photovoltaic systems utilize solar energy to generate electrical energy to meet load demands. Optimal sizing of these systems includes the characterization of solar radiation. Solar radiation at the Earth's surface has random characteristics and has been the focus of various academic studies. The objective of this study was to stochastically analyze parameters involved in the sizing of photovoltaic generators and develop a methodology for sizing of stand-alone photovoltaic systems. Energy storage for isolated systems and solar radiation were analyzed stochastically due to their random behavior. For the development of the methodology proposed stochastic analysis were studied including the Markov chain and beta probability density function. The obtained results were compared with those for sizing of stand-alone using from the Sandia method (deterministic), in which the stochastic model presented more reliable values. Both models present advantages and disadvantages; however, the stochastic one is more complex and provides more reliable and realistic results. (author)

Cabral, Claudia Valeria Tavora; Filho, Delly Oliveira; Martins, Jose Helvecio; Toledo, Olga Moraes [Department of Agricultural Engineering, Federal University of Vicosa, Av. P. H. Rolfs, s/n. 36570-000 Vicosa, Minas Gerais (Brazil); Diniz, Antonia Sonia Alves C.; Machado Neto, Lauro de Vilhena B. [Group of Studies in Energy - GREEN Solar, Pontifical Catholic University of Minas Gerais - PUC Minas, Rua Dom Jose Gaspar no. 500, Predio 03, Sala 218 - Coracao Eucaristico 30535-610 Belo Horizonte - Minas Gerais (Brazil)

2010-09-15T23:59:59.000Z

131

CURRENT SOURCING ISOLATED GRID CONNECTED INVERTER Ilya Zeltser, Student Member, IEEE and Sam Ben-Yaakov, Senior Member, IEEE  

E-Print Network [OSTI]

CURRENT SOURCING ISOLATED GRID CONNECTED INVERTER Ilya Zeltser, Student Member, IEEE and Sam Ben proposes a soft switched Output Current Sourcing (OCS) grid connected inverter that applies a high inverters where the small disturbance at the line voltage may lead to current run away and consequently

132

Maine: United States Launches First Grid-Connected Offshore Wind...  

Office of Environmental Management (EM)

in maritime energy infrastructure and ship building to construct this first-of-its-kind wind energy system. As part of a separate project, the University of Maine is planning a...

133

Comparative study of voltage oriented and frequency coordinated control of grid connected doubly fed induction generator  

Science Journals Connector (OSTI)

In this paper a comparative study between voltage oriented control (VOC) and frequency coordinated control (FCC) of grid connected doubly fed induction generator (DFIG) is presented. The two method controls are deeply done on DFIG converter sides grid side converter (GSC) and rotor side converter (RSC). The VOC method permanently maintains the DFIG reactive power to zero values to achieve stable voltage. This control is implemented by regulating the rotor direct axis reference current in RSC using grid reactive power. On the other hand the FCC has employed the active power obtaining from the system frequency deviation to control the rotor quadrature axis reference current in the RSC. The GSC is the same in two studies and its applied vector controlled method. The comparison study between the two methods is conducted at a steady and dynamic state under constant and variable wind speeds. The simulation results are carried out by using PSCAD/EMTDC electromagnetic transient program to validate the comparison study between two methods control of DFIG. The outcomes of the simulation show that the VOC is very convenient when the DFIG operated at transient mode and variable wind speeds while the FCC is feasible and effective for steady-state mode applications. Furthermore the FCC method has an ability to reduce the active and reactive powers ripples as well as decreasing torque harmonics. Both of two methods had fewer transient recovery values of output parameters which ensure safety dynamic response of DFIG and power system. This study contributes significantly to choose the suitable control of the DFIG converters according to electrical grid operation conditions. In addition if a joint control has been applied to these two methods the wind power gained strong and flexible control of the frequency and voltage for different operating conditions.

Li Yang

2014-01-01T23:59:59.000Z

134

The Impact of City-level Permitting Processes on Residential Photovoltaic Installation Prices and Development Times: An Empirical Analysis of Solar Systems in California Cities  

E-Print Network [OSTI]

L. 1978. Cost of photovoltaic energy systems as determinedmodel of solar photovoltaic deployment. ” Energy Policy, 36:economics of photovoltaic power. ” Renewable Energy 53 (0):

Wiser, Ryan

2014-01-01T23:59:59.000Z

135

Environmental Assessment of Photovoltaic Systems and Effectiveness Analysis  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Environmental Assessment of Photovoltaic Systems and Effectiveness Analysis Environmental Assessment of Photovoltaic Systems and Effectiveness Analysis of U.S. Renewable Energy Policies Speaker(s): Pei Zhai Date: October 25, 2010 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Chris Marnay This presentation mainly covers two perspectives relevant to solar energy technologies. The first one is the environmental aspect. The questions to be answered are how "green" photovoltaic technology is (embodied energy and carbon are two main indicators); and, how have these two indicators evolved during the past 10 years. The methodology for analysis is a hybrid Life Cycle Assessment. The second part involves a policy analysis of the effectiveness of U.S. renewable energy policies, such as state-level Renewable Portfolio Standards, for supporting solar energy adoption. A

136

Utilizing Photovoltaic Cells and Systems (9 Activities)  

K-12 Energy Lesson Plans and Activities Web site (EERE)

These nine projects allow students to set up their own investigations and manipulate the variables that influence photovoltaic cells. The projects can be easily integrated into a normal science classroom curriculum, or can be completed by students individually for science fair projects. All of the projects will fit easily into classroom lessons surrounding scientific inquiry and the scientific method. They will also help illustrate concepts in electricity, light and color, velocity and gravity, chemistry and polarity, and could even lead to social studies or social action projects.

137

MHK Projects/Evopod E1 1 10 scale grid connected demonstrator | Open Energy  

Open Energy Info (EERE)

Evopod E1 1 10 scale grid connected demonstrator Evopod E1 1 10 scale grid connected demonstrator < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","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":54.388,"lon":-5.566,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

138

MHK Projects/Evopod E35 35kW grid connected demonstrator | Open Energy  

Open Energy Info (EERE)

E35 35kW grid connected demonstrator E35 35kW grid connected demonstrator < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","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":55.3028,"lon":-5.59772,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

139

First U.S. Grid-Connected Offshore Wind Turbine Installed Off the Coast of Maine  

Broader source: Energy.gov [DOE]

Castine, Maine - The University of Maine's Advanced Structures and Composites Center partnered with Maine Maritime Academy and Cianbro to launch a deepwater offshore floating wind turbine near Bangor. When the turbine was turned on and electricity began flowing through an undersea cable to Central Maine Power on June 13, the VolturnUS 1:8 became the first grid-connected floating offshore wind turbine in the Americas.

140

Compatibility Study of Protective Relaying in a Grid-Connected Fuel Cell  

SciTech Connect (OSTI)

A 200-kW fuel cell produced by International Fuel Cells (IFC), a United Technologies Company, began operation at the National Transportation Research Center (NTRC) in early June 2003. The NTRC is a joint Oak Ridge National laboratory (ORNL) and University of Tennessee research facility located in Knoxville, Tennessee. This research activity investigated the protective relaying functions of this fully commercialized fuel cell power plant, which uses ''synthesized'' protective relays. The project's goal is to characterize the compatibility between the fuel cell's interconnection protection system and the local distribution system or electric power system (EPS). ORNL, with assistance from the Electric Power Research Institute-Power Electronics Applications Center (EPRI-PEAC) in Knoxville, Tennessee, monitored and characterized the system compatibility over a period of 6 months. Distribution utility engineers are distrustful of or simply uncomfortable with the protective relaying and hardware provided as part of distributed generation (DG) plants. Part of this mistrust is due to the fact that utilities generally rely on hardware from certain manufacturers whose reliability is well established based on performance over many years or even decades. Another source of concern is the fact that fuel cells and other types of DG do not use conventional relays but, instead, the protective functions of conventional relays are simulated by digital circuits in the distributed generator's grid interface control unit. Furthermore, the testing and validation of internal protection circuits of DG are difficult to accomplish and can be changed by the vendor at any time. This study investigated and documented the safety and protective relaying present in the IFC fuel cell, collected data on the operation of the fuel cell, recorded event data during EPS disturbances, and assessed the compatibility of the synthesized protective circuits and the local distribution system. The project also addressed other important and timely issues. For instance, the study includes an evaluation of the effectiveness of the fuel cell's synthesized relay protection scheme relative to the recently issued IEEE 1547 interconnection standard. Together, these activities should serve to reduce the number of unknowns pertaining to unconventional protective circuits, to the benefit of DG manufacturers, vendors, prospective and current users of DG, and electricity suppliers/distributors. Although more grid-connect fuel cell interruptions were encountered in this study than originally anticipated, and the investigation and findings became quite complex, every effort was made to clearly summarize the interconnection causes and issues throughout the report and especially in the summary found in Sect. 4. ORNL's funding of this study is sponsored equally by (1) the Department of Energy's (DOE's) Office of Distributed Energy Resources and (2) the Distributed Generation Technologies program of the Tennessee Valley Authority (TVA).

Staunton, R.H.

2004-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

The evolution of building integrated photovoltaics (BIPV) in the German and French technological innovation systems for solar cells.  

E-Print Network [OSTI]

??Building integrated photovoltaics (BIPV) are photovoltaic (PV) systems, fulfilling a function of a building and therefore allowing synergy effects by substituting the ordinary envelope of… (more)

Rode, Johannes

2007-01-01T23:59:59.000Z

142

A prototype photovoltaic/thermal system integrated with transpired collector  

SciTech Connect (OSTI)

Building-integrated photovoltaic/thermal (BIPV/T) systems may be utilized to produce useful heat while simultaneously generating electricity from the same building envelope surface. A well known highly efficient collector is the open-loop unglazed transpired collector (UTC) which consists of dark porous cladding through which outdoor air is drawn and heated by absorbed solar radiation. Commercially available photovoltaic systems typically produce electricity with efficiencies up to about 18%. Thus, it is beneficial to obtain much of the normally wasted heat from the systems, possibly by combining UTC with photovoltaics. Combination of BIPV/T and UTC systems for building facades is considered in this paper - specifically, the design of a prototype facade-integrated photovoltaic/thermal system with transpired collector (BIPV/T). A full scale prototype is constructed with 70% of UTC area covered with PV modules specially designed to enhance heat recovery and compared to a UTC of the same area under outdoor sunny conditions with low wind. The orientation of the corrugations in the UTC is horizontal and the black-framed modules are attached so as to facilitate flow into the UTC plenum. While the overall combined thermal efficiency of the UTC is higher than that of the BIPV/T system, the value of the generated energy - assuming that electricity is at least four times more valuable than heat - is between 7% and 17% higher. Also, the electricity is always useful while the heat is usually utilized only in the heating season. The BIPV/T concept is applied to a full scale office building demonstration project in Montreal, Canada. The ratio of photovoltaic area coverage of the UTC may be selected based on the fresh air heating needs of the building, the value of the electricity generated and the available building surfaces. (author)

Athienitis, Andreas K.; Bambara, James; O'Neill, Brendan; Faille, Jonathan [Dept. of Building, Civil and Environmental Engineering, Concordia University, 1455 Maisonneuve W., Montreal, Quebec (Canada)

2011-01-15T23:59:59.000Z

143

Benchmarking Non-Hardware Balance-of-System (Soft) Costs for U.S. Photovoltaic Systems Using a Bottom-Up Approach and Installer Survey  

E-Print Network [OSTI]

Photovoltaic System Prices in the United States: Current Drivers and Costsoft” costs— for residential and commercial photovoltaic (of-System (Soft) Costs for U.S. Photovoltaic Systems Using a

Ardani, Kristen

2014-01-01T23:59:59.000Z

144

Optimization in solar heating/photovoltaic systems. Master's thesis  

SciTech Connect (OSTI)

This thesis is a design of an alternative system which may provide heating to the Naval Postgraduate School swimming pool. Particularly, it is a solar heating/photovoltaic system designed for a better efficiency and less cost of installation and maintenance. Principles of heat transfer, control and fluid dynamics theory are used for the determination of this heating system elements. The feasibility of its installation and use is analyzed.

Vourazelis, D.G.

1990-12-01T23:59:59.000Z

145

Photovoltaic array mounting apparatus, systems, and methods  

DOE Patents [OSTI]

An apparatus for mounting a photovoltaic (PV) module on a surface, including a support with an upper surface, a lower surface, tabs, one or more openings, and a clip comprising an arm and a notch, where the apparatus resists wind forces and seismic forces and creates a grounding electrical bond between the PV module, support, and clip. The invention further includes a method for installing PV modules on a surface that includes arranging supports in rows along an X axis and in columns along a Y axis on a surface such that in each row the distance between two neighboring supports does not exceed the length of the longest side of a PV module and in each column the distance between two neighboring supports does not exceed the length of the shortest side of a PV module.

West, John Raymond; Atchley, Brian; Hudson, Tyrus Hawkes; Johansen, Emil

2014-12-02T23:59:59.000Z

146

Public Meeting: Physical Characterization of Smart and Grid-Connected Commercial and Residential Building End-Use Equipment and Appliances  

Broader source: Energy.gov [DOE]

These documents contain slide decks presented at the Physical Characterization of Smart and Grid-Connected Commercial and Residential Buildings End-Use Equipment and Appliances public meeting held on April 30, 2014.

147

Residential photovoltaic flywheel storage system performance and cost  

SciTech Connect (OSTI)

A subscale prototype of a flywheel energy storage and conversion system for use with photovoltaic power systems of residential and intermediate load-center size has been designed, built and tested by MIT Lincoln Laboratory. System design, including details of such key components as magnetic bearings, motor generator, and power-conditioning electronics, are described. Performance results of prototype testing are given and indicate that this system is the equal of or superior to battery and inverter systems for the same application. Results of cost and user-worth analysis show that residential systems are economically feasible in stand-alone and in utility-interactive applications.

Hay, R.D.; Millner, A.R.; Jarvinen, P.O.

1980-01-01T23:59:59.000Z

148

Implementations of electric vehicle system based on solar energy in Singapore : assessment of solar photovoltaic systems  

E-Print Network [OSTI]

To evaluate the feasibility of solar energy based Electric Vehicle Transportation System in Singapore, the state of the art Photovoltaic Systems have been reviewed in this report with a focus on solar cell technologies. ...

Sun, Li

2009-01-01T23:59:59.000Z

149

Cost Analysis of a Concentrator Photovoltaic Hydrogen Production System  

SciTech Connect (OSTI)

The development of efficient, renewable methods of producing hydrogen are essential for the success of the hydrogen economy. Since the feedstock for electrolysis is water, there are no harmful pollutants emitted during the use of the fuel. Furthermore, it has become evident that concentrator photovoltaic (CPV) systems have a number of unique attributes that could shortcut the development process, and increase the efficiency of hydrogen production to a point where economics will then drive the commercial development to mass scale.

Thompson, J. R.; McConnell, R. D.; Mosleh, M.

2005-08-01T23:59:59.000Z

150

Photovoltaics: New opportunities for utilities  

SciTech Connect (OSTI)

This publication presents information on photovoltaics. The following topics are discussed: Residential Photovoltaics: The New England Experience Builds Confidence in PV; Austin's 300-kW Photovoltaic Power Station: Evaluating the Breakeven Costs; Residential Photovoltaics: The Lessons Learned; Photovoltaics for Electric Utility Use; Least-Cost Planning: The Environmental Link; Photovoltaics in the Distribution System; Photovoltaic Systems for the Rural Consumer; The Issues of Utility-Intertied Photovoltaics; and Photovoltaics for Large-Scale Use: Costs Ready to Drop Again.

Not Available

1991-07-01T23:59:59.000Z

151

Photovoltaic Potential and Insolation Maps (Canada) | Open Energy  

Open Energy Info (EERE)

Photovoltaic Potential and Insolation Maps (Canada) Photovoltaic Potential and Insolation Maps (Canada) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Photovoltaic Potential and Insolation Maps (Canada) Focus Area: Renewable Energy Topics: Potentials & Scenarios Website: glfc.cfsnet.nfis.org/mapserver/pv/pvmapper.phtml?LAYERS=2700,2701,2057 Equivalent URI: cleanenergysolutions.org/content/photovoltaic-potential-and-insolation Language: English Policies: Regulations Regulations: Net Metering & Interconnection These interactive maps give estimates of the electricity that can be generated by grid-connected photovoltaic (PV) arrays without batteries and of the mean daily global insolation for any location in Canada. Insolation data was provided by the Data Analysis and Archive Division, Meteorological

152

Models used to assess the performance of photovoltaic systems.  

SciTech Connect (OSTI)

This report documents the various photovoltaic (PV) performance models and software developed and utilized by researchers at Sandia National Laboratories (SNL) in support of the Photovoltaics and Grid Integration Department. In addition to PV performance models, hybrid system and battery storage models are discussed. A hybrid system using other distributed sources and energy storage can help reduce the variability inherent in PV generation, and due to the complexity of combining multiple generation sources and system loads, these models are invaluable for system design and optimization. Energy storage plays an important role in reducing PV intermittency and battery storage models are used to understand the best configurations and technologies to store PV generated electricity. Other researcher's models used by SNL are discussed including some widely known models that incorporate algorithms developed at SNL. There are other models included in the discussion that are not used by or were not adopted from SNL research but may provide some benefit to researchers working on PV array performance, hybrid system models and energy storage. The paper is organized into three sections to describe the different software models as applied to photovoltaic performance, hybrid systems, and battery storage. For each model, there is a description which includes where to find the model, whether it is currently maintained and any references that may be available. Modeling improvements underway at SNL include quantifying the uncertainty of individual system components, the overall uncertainty in modeled vs. measured results and modeling large PV systems. SNL is also conducting research into the overall reliability of PV systems.

Stein, Joshua S.; Klise, Geoffrey T.

2009-12-01T23:59:59.000Z

153

IEEE JOURNAL OF PHOTOVOLTAICS 1 Optimal Dispatch of Residential Photovoltaic  

E-Print Network [OSTI]

IEEE JOURNAL OF PHOTOVOLTAICS 1 Optimal Dispatch of Residential Photovoltaic Inverters Under of existing low- voltage distribution systems with high photovoltaic (PV) gen- eration have focused relaxation techniques. Index Terms--Distribution networks, microgrids, photovoltaic systems, inverter control

Giannakis, Georgios

154

Comparative study of Non -Tracking and Low Concentrating Photovoltaic systems Using Low -Cost Reflectors.  

E-Print Network [OSTI]

??The traditional high concentrating photovoltaic systems have proved to be expensive as they use high grade silicon solar cells, highly specular reflecting materials and require… (more)

Hatwaambo, Sylvester

2012-01-01T23:59:59.000Z

155

Japan's Solar Photovoltaic (PV) Market: An Analysis of Residential System Prices (Presentation)  

SciTech Connect (OSTI)

This presentation summarizes market and policy factors influencing residential solar photovoltaic system prices in Japan, and compares these factors to related developments in the United States.

James, T.

2014-03-01T23:59:59.000Z

156

NREL: Photovoltaics Research - Pholtovoltaic System Performance...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Pholtovoltaic System Performance Data Photo looking north-northwest at solar panels aligned in rows on the roof of a commercial building. The Terry Sanford Federal Building in...

157

Optimum Energy Management of a Photovoltaic Water Pumping System  

Science Journals Connector (OSTI)

This paper presents a new management of the energy of a photovoltaic water pumping installation composed of a battery, a water pump and a photovoltaic panel. The approach makes decision on the optimum connecti...

Souhir Sallem; Maher Chaabene; M. B. A. Kamoun

2009-01-01T23:59:59.000Z

158

Efficient scale for photovoltaic systems and Florida's solar rebate program  

Science Journals Connector (OSTI)

This paper presents a critical view of Florida's photovoltaic (PV) subsidy system and proposes an econometric model of PV system installation and generation costs. Using information on currently installed systems, average installation cost relations for residential and commercial systems are estimated and cost-efficient scales of installation panel wattage are identified. Productive efficiency in annual generating capacity is also examined under flexible panel efficiency assumptions. We identify potential gains in efficiency and suggest changes in subsidy system constraints, providing important guidance for the implementation of future incentive programs. Specifically, we find that the subsidy system discouraged residential applicants from installing at the cost-efficient scale but over-incentivized commercial applicants, resulting in inefficiently sized installations.

Christopher S. Burkart; Nestor M. Arguea

2012-01-01T23:59:59.000Z

159

System Advisor Model: Flat Plate Photovoltaic Performance Modeling Validation Report  

SciTech Connect (OSTI)

The System Advisor Model (SAM) is a free software tool that performs detailed analysis of both system performance and system financing for a variety of renewable energy technologies. This report provides detailed validation of the SAM flat plate photovoltaic performance model by comparing SAM-modeled PV system generation data to actual measured production data for nine PV systems ranging from 75 kW to greater than 25 MW in size. The results show strong agreement between SAM predictions and field data, with annualized prediction error below 3% for all fixed tilt cases and below 8% for all one axis tracked cases. The analysis concludes that snow cover and system outages are the primary sources of disagreement, and other deviations resulting from seasonal biases in the irradiation models and one axis tracking issues are discussed in detail.

Freeman, J.; Whitmore, J.; Kaffine, L.; Blair, N.; Dobos, A. P.

2013-12-01T23:59:59.000Z

160

Study on environmental impact model of grid-connected wind power generation  

Science Journals Connector (OSTI)

As a clean and renewable energy source, wind power is independent from the traditional external energy change, which makes it one of the most promising ways of clean energy generation. It is well known that wind power has obvious energy saving efficiency. But for long-term consideration, wind power generation still has certain impacts on human life. Therefore, standing in the point of the negative effects of wind energy, this paper makes a further research on environmental issues of wind energy development and utilisation. Then combining with fuzzy theory, the environmental impact model of wind energy utilisation is constructed, the science and effectiveness of the model is validated thorough example analysis, which aims to lay a solid theoretical foundation to solve the problems of wind farm grid-connection.

Hao Chang; Jicheng Liu; Cunbin Li

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

PVWATTS Version 2 - Enhanced Spatial Resolution for Calculating Grid-Connected PV Performance: Preprint  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

PVWATTS Version 2 - PVWATTS Version 2 - Enhanced Spatial Resolution for Calculating Grid-Connected PV Performance Preprint October 2001 * NREL/CP-560-30941 B. Marion, M. Anderberg, R. George, P. Gray-Hann, and D. Heimiller To be presented at the NCPV Program Review Meeting Lakewood, Colorado 14-17 October 2001 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute * * * * Battelle * * * * Bechtel Contract No. DE-AC36-99-GO10337 NOTICE The submitted manuscript has been offered by an employee of the Midwest Research Institute (MRI), a contractor of the US Government under Contract No. DE-AC36-99GO10337. Accordingly, the US Government and MRI retain a nonexclusive royalty-free license to publish or reproduce the published

162

Solar Leasing for Residential Photovoltaic Systems  

Broader source: Energy.gov [DOE]

This publication examines the solar lease option for residential PV systems and describes two solar lease programs already in place. As a result of the $2,000 cap on the residential ITC being lifted in 2009, the expansion of the solar lease model across the United States may be slower than anticipated. The lease model, though, still offers homeowners some distinct advantages. This publication helps homeowners revisit the comparison between the solar lease and home-equity financing in light of the change to the ITC.

163

Agenda for Public Meeting on the Physical Characterization of Grid-Connected Commercial and Residential Buildings End-Use Equipment and Appliances  

Broader source: Energy.gov [DOE]

Download the agenda below for the July 11 Public Meeting on the Physical Characterization of Grid-Connected Commercial and  Residential Buildings End-Use Equipment and Appliances.

164

Sandia National Laboratories: Photovoltaics  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sandia's solar photovoltaic (PV) work is focused on developing cost-effective, reliable photovoltaic energy systems and accelerating the integration of PV technology in the...

165

Sandia National Laboratories: photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

electricity. Sandia photovoltaic work is centered on developing cost-effective, reliable photovoltaic energy systems produced by US industry and used worldwide. Learn More...

166

A Novel Approach to Build a Generic Model of Photovoltaic Solar System Using Sound Biometric Techniques  

Science Journals Connector (OSTI)

This chapter presents the proposed model of combination between Photovoltaic solar system resources and sound biometric techniques, to generate power energy from the sunlight using the PVS controlled by a sound biometric technique. This work contributes ... Keywords: Electricity Consumption, Energy Conversion, Energy Storage Device, Photovoltaic Solar System (PVS), Sound Recognition Techniques

Khalid T. Al-Sarayreh, Kenza Meridji, Ebaa Fayyoumi, Sahar Idwan

2014-01-01T23:59:59.000Z

167

Technical analysis of prospective photovoltaic systems in Utah.  

SciTech Connect (OSTI)

This report explores the technical feasibility of prospective utility-scale photovoltaic system (PV) deployments in Utah. Sandia National Laboratories worked with Rocky Mountain Power (RMP), a division of PacifiCorp operating in Utah, to evaluate prospective 2-megawatt (MW) PV plants in different locations with respect to energy production and possible impact on the RMP system and customers. The study focused on 2-MW{sub AC} nameplate PV systems of different PV technologies and different tracking configurations. Technical feasibility was evaluated at three different potential locations in the RMP distribution system. An advanced distribution simulation tool was used to conduct detailed time-series analysis on each feeder and provide results on the impacts on voltage, demand, voltage regulation equipment operations, and flicker. Annual energy performance was estimated.

Quiroz, Jimmy Edward; Cameron, Christopher P.

2012-02-01T23:59:59.000Z

168

Analysis of Photovoltaic System Energy Performance Evaluation Method  

SciTech Connect (OSTI)

Documentation of the energy yield of a large photovoltaic (PV) system over a substantial period can be useful to measure a performance guarantee, as an assessment of the health of the system, for verification of a performance model to then be applied to a new system, or for a variety of other purposes. Although the measurement of this performance metric might appear to be straight forward, there are a number of subtleties associated with variations in weather and imperfect data collection that complicate the determination and data analysis. A performance assessment is most valuable when it is completed with a very low uncertainty and when the subtleties are systematically addressed, yet currently no standard exists to guide this process. This report summarizes a draft methodology for an Energy Performance Evaluation Method, the philosophy behind the draft method, and the lessons that were learned by implementing the method.

Kurtz, S.; Newmiller, J.; Kimber, A.; Flottemesch, R.; Riley, E.; Dierauf, T.; McKee, J.; Krishnani, P.

2013-11-01T23:59:59.000Z

169

Predicting the Effects of Short-Term Photovoltaic Variability on Power System Frequency for Systems with Integrated Energy Storage.  

E-Print Network [OSTI]

?? The percentage of electricity supplied by photovoltaic (PV) generators is steadily rising in power systems worldwide. This rise in PV penetration may lead to… (more)

Traube, Joshua White

2014-01-01T23:59:59.000Z

170

Utility Scale Wind Turbines on a Grid Connected Island Mohit Dua, Anthony L. Rogers, James F. Manwell,  

E-Print Network [OSTI]

Utility Scale Wind Turbines on a Grid Connected Island Mohit Dua, Anthony L. Rogers, James F utility scale wind turbines on Fox Islands, located 12 miles from the coast of Maine in the United States of electricity itself. Three locations are analyzed in detail as potential sites for wind turbine installations

Massachusetts at Amherst, University of

171

OFF-SHORE WIND AND GRID-CONNECTED PV: HIGH PENETRATION PEAK SHAVING FOR NEW YORK CITY  

E-Print Network [OSTI]

OFF-SHORE WIND AND GRID-CONNECTED PV: HIGH PENETRATION PEAK SHAVING FOR NEW YORK CITY Richard Perez-shore wind and PV generation using the city of New York as a test case. While wind generation is not known the source of the energy that can meet the demand. While the peak-time availability of wind generation

Perez, Richard R.

172

PHOTOVOLTAIC MODULE AND SHADOW: STUDY AND INTEGRATION OF A CURRENT BALANCING SYSTEM  

E-Print Network [OSTI]

PHOTOVOLTAIC MODULE AND SHADOW: STUDY AND INTEGRATION OF A CURRENT BALANCING SYSTEM Stéphane: Current crystalline photovoltaic modules (PV) are designed with 36 or 72 series ­ connected PV cells of shadow, keep the reliability and the cost imposed by the market [7, 8, and 9]. This study concerns

Paris-Sud XI, Université de

173

Assessing the prospective environmental impacts of photovoltaic systems based on a simplified LCA model  

E-Print Network [OSTI]

Assessing the prospective environmental impacts of photovoltaic systems based on a simplified LCA cycle analysis (LCA). However, LCA requires the collection of a large amount of data and is thus time-consuming. Besides, LCA results found in the literature corresponding to the photovoltaic energy pathway show a large

Paris-Sud XI, Université de

174

A Computer Program Development for Sizing Stand-alone Photovoltaic-Wind Hybrid Systems  

Science Journals Connector (OSTI)

Abstract The exhaustion and all the drawbacks of fossil fuels are the main elements that led to the development and use of new alternativesfor power generation based on renewable energy,amongthem: photovoltaic energy systems, windenergy systems and their combination in a hybrid photovoltaic-wind system. In this paper we proposed a sizing approach of stand-alone Photovoltaic-Wind systems which is evaluated by the development of a computer applicationbased essentially on Loss of Power Supply Probability (LPSP) algorithmto provide an optimal technical-economic configuration. An example of a PV-Wind plant sizing is presented and discussed.

H. Belmili; M.F. Almi; B.Bendib; S. Bolouma

2013-01-01T23:59:59.000Z

175

Producer-Focused Life Cycle Assessment of Thin-Film Silicon Photovoltaic Systems  

E-Print Network [OSTI]

cycle impacts and costs of photovoltaic systems: currentcosts: 2004early 2005 status. Progress in Photovoltaicphotovoltaic systems often do not consider panel installation, even though it is a major component of their financial cost.

Zhang, Teresa Weirui

2011-01-01T23:59:59.000Z

176

Study of the Overall Efficiency of a 7 pkw Solar Photovoltaic Pumpng System at Mugombwa (Rwanda)  

Science Journals Connector (OSTI)

The solar pumping system installed since 1985 by the ... is powered by a photovoltaic array of 132 pannels of 52 peak watt each. Our concern ... efficiency of the system by measuring both the solar global radiati...

Prosper Mpawenayo

1991-01-01T23:59:59.000Z

177

A Photovoltaic-Hydrogen-Fuel Cell Energy System: Preliminary Operational Results  

Science Journals Connector (OSTI)

We report preliminary operational results for a photovoltaic (PV) energy system which uses hydrogen as the storage medium and a fuel cell as the regeneration technology. The system installed at the Humboldt St...

P. A. Lehman; C. E. Chamberlin

1991-01-01T23:59:59.000Z

178

Government policy and innovation activity : a patent study of solar photovoltaic balance of system in Japan.  

E-Print Network [OSTI]

??This report studied innovation activity in four areas of the solar photovoltaic balance-of-system (BOS) technologies (inverters, mounting equipment, monitoring systems, and site assessment) in the… (more)

Takeda, Chihiro

2014-01-01T23:59:59.000Z

179

System for characterizing semiconductor materials and photovoltaic devices through calibration  

DOE Patents [OSTI]

A method and apparatus for measuring characteristics of a piece of material, typically semiconductor materials including photovoltaic devices. The characteristics may include dislocation defect density, grain boundaries, reflectance, external LBIC, internal LBIC, and minority carrier diffusion length. The apparatus includes a light source, an integrating sphere, and a detector communicating with a computer. The measurement or calculation of the characteristics is calibrated to provide accurate, absolute values. The calibration is performed by substituting a standard sample for the piece of material, the sample having a known quantity of one or more of the relevant characteristics. The quantity measured by the system of the relevant characteristic is compared to the known quantity and a calibration constant is created thereby.

Sopori, Bhushan L. (Denver, CO); Allen, Larry C. (Arvada, CO); Marshall, Craig (Littleton, CO); Murphy, Robert C. (Golden, CO); Marshall, Todd (Littleton, CO)

1998-01-01T23:59:59.000Z

180

Performances of photovoltaic water pumping systems: a case study  

Science Journals Connector (OSTI)

This paper presents a mathematical motor-pump model for photovoltaic (PV) applications which allow us to contribute in the studies of PV pumping sizing. The modelled motor-pump characteristic is flow rate-power (Q, P). The model is established for centrifugal pump (CP) coupled to DC motor. The non-linear relation between flow rate and solar power has been obtained experimentally in a first step and then used for performance prediction. The model proposed enabled us to simulate the electric and hydraulic performances of CP pumps versus the total water heads for different PV array configuration. The experimental data are obtained with our pumping test facility. The performances are calculated using the measured meteorological data of different sites located in Saudi Arabia. The size of the PV array is varied to achieve the optimum performance of the proposed system.

M. Benghanem

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

System for characterizing semiconductor materials and photovoltaic devices through calibration  

DOE Patents [OSTI]

A method and apparatus are disclosed for measuring characteristics of a piece of material, typically semiconductor materials including photovoltaic devices. The characteristics may include dislocation defect density, grain boundaries, reflectance, external LBIC, internal LBIC, and minority carrier diffusion length. The apparatus includes a light source, an integrating sphere, and a detector communicating with a computer. The measurement or calculation of the characteristics is calibrated to provide accurate, absolute values. The calibration is performed by substituting a standard sample for the piece of material, the sample having a known quantity of one or more of the relevant characteristics. The quantity measured by the system of the relevant characteristic is compared to the known quantity and a calibration constant is created thereby. 44 figs.

Sopori, B.L.; Allen, L.C.; Marshall, C.; Murphy, R.C.; Marshall, T.

1998-05-26T23:59:59.000Z

182

564 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 2, NO. 4, OCTOBER 2012 Dynamic Stability of Three-Phase Grid-Connected  

E-Print Network [OSTI]

gained popularity due to the feed-in-tariff and the reduction of battery cost. However, the intermittent

Pota, Himanshu Roy

183

Tracking the Sun IV: An Historical Summary of the Installed Cost of Photovoltaics in the United States from 1998 to 2010  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tracking Tracking the Sun IV Tracking the Sun IV An Historical Summary of the Installed Cost of Photovoltaics in the United States from 1998 to 2010 Photovoltaics in the United States from 1998 to 2010 Galen Barbose, NaĂŻm Darghouth, Ryan Wiser, and Joachim Seel g y Lawrence Berkeley National Laboratory - Report Summary - p y September 2011 Environmental Energy Technologies Division * Energy Analysis Department Thanks to the U.S. DOE's Solar Energy Technologies Program and the Clean Energy States Alliance for supporting this work Project Overview Objective: Using project-level data, evaluate trends in the installed cost of grid-connected PV systems throughout the United States: g y g * Changes in total system installed cost and component-level costs over time * Variation in total installed cost by system size

184

Photovoltaic Powering And Control System For Electrochromic Windows  

DOE Patents [OSTI]

A sealed insulated glass unit is provided with an electrochromic device for modulating light passing through the unit. The electrochromic device is controlled from outside the unit by a remote control electrically unconnected to the device. Circuitry within the unit may be magnetically controlled from outside. The electrochromic device is powered by a photovoltaic cells. The photovoltaic cells may be positioned so that at least a part of the light incident on the cell passes through the electrochromic device, providing a form of feedback control. A variable resistance placed in parallel with the electrochromic element is used to control the response of the electrochromic element to changes in output of the photovoltaic cell.

Schulz, Stephen C. (Tewksbury, MA); Michalski, Lech A. (Pennington, NJ); Volltrauer, Hermann N. (Englishtown, NJ); Van Dine, John E. (Faribault, MN)

2000-04-25T23:59:59.000Z

185

Justification of village scale photovoltaic powered electrodialysis desalination systems for rural India  

E-Print Network [OSTI]

This thesis justifies photovoltaic (PV)-powered electrodialysis (ED) as an energy and cost-effective means of desalinating groundwater in rural India and presents the design requirements for a village-level system. Saline ...

Wright, Natasha C. (Natasha Catherine)

2014-01-01T23:59:59.000Z

186

Retrospective Benefit-Cost Evaluation of DOE Investment in Photovoltaic Energy Systems  

Broader source: Energy.gov [DOE]

Retrospective Benefit-Cost Evaluation of DOE Investment in Photovoltaic Energy Systems, a report from the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy

187

Optical design guidelines for spectral splitting photovoltaic systems : a sensitivity analysis approach  

E-Print Network [OSTI]

Solar power has unmatched ability to provide greater security and reduced environmental impact for the energy sector. Photovoltaic (PV) systems provide the most popular method used today for harnessing this power. However, ...

Berney Needleman, David

2014-01-01T23:59:59.000Z

188

Modeling of Performance, Cost, and Financing of Concentrating Solar, Photovoltaic, and Solar Heat Systems (Poster)  

SciTech Connect (OSTI)

This poster, submitted for the CU Energy Initiative/NREL Symposium on October 3, 2006 in Boulder, Colorado, discusses the modeling, performance, cost, and financing of concentrating solar, photovoltaic, and solar heat systems.

Blair, N.; Mehos, M.; Christiansen, C.

2006-10-03T23:59:59.000Z

189

Environmental impacts of large-scale grid-connected ground-mounted PV installations  

E-Print Network [OSTI]

deployment and solar energy use are developing rapidly in Europe. In particular, Austria, Switzerland the higher external environmental costs of PV compared to those of nuclear energy and natural-gas-fuel power,6]. They highlighted the photovoltaic potential for a low carbon energy supply and the environmental benefits of PV

Paris-Sud XI, Université de

190

Integrating Solar Thermal and Photovoltaic Systems in Whole Building Energy Simulation  

E-Print Network [OSTI]

INTEGRATING SOLAR THERMAL AND PHOTOVOLTAIC SYSTEMS IN WHOLE BUILDING ENERGY SIMULATION Soolyeon Cho1 and Jeff S. Haberl2 1The Catholic University of America, Washington, DC 2Texas A&M University, College Station, TX ABSTRACT... This paper introduces methodologies on how the renewable energy generated by the solar thermal and solar photovoltaic (PV) systems installed on site can be integrated in the whole building simulation analyses, which then can be available to analyze...

Cho, S.; Haberl, J.

191

Enhanced Reliability of Photovoltaic Systems with Energy Storage and Controls  

SciTech Connect (OSTI)

This report summarizes efforts to reconfigure loads during outages to allow individual customers the opportunity to enhance the reliability of their electric service through the management of their loads, photovoltaics, and energy storage devices.

Manz, D.; Schelenz, O.; Chandra, R.; Bose, S.; de Rooij, M.; Bebic, J.

2008-02-01T23:59:59.000Z

192

NREL: Energy Systems Integration Facility - Systems Integration  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

system components for grid-connected, standalone, and microgrid applications Test large power system components such as inverters, diesel and natural gas generators, battery...

193

Environmental, health, and safety assessment of photovoltaics  

SciTech Connect (OSTI)

Potential enviornmental, health, and safety (E,H and S) concerns associated with all phases of the photovoltaic (PV) energy system life cycle are identified and assessed. E,H and S concerns affecting the achievement of National PV Program goals or the viability of specific PV technologies are emphasized. The report is limited to near-term manufacturing process alternatives for crystalline silicon PV materials, addresses flat-plate and concentrator collector designs, and reviews system deployment in grid-connected, roof-mounted, residential and ground-mounted central-station applications. The PV life-cycle phases examined include silicon refinement and manufacture of PV collectors, system deployment, and decommissioning. The primary E,H and S concerns that arise during collector fabrication are associated with occupational exposure to materials of undetermined toxicity or to materials that are known to be hazardous, but for which process control technology may be inadequate. Stricter exposure standards are anticipated for some materials and may indicate a need for further control technology development. Minimizing electric shock hazards is a significant concern during system construction, operation and maintenance, and decommissioning.

Rose, E.C.

1983-10-15T23:59:59.000Z

194

Understanding Variability and Uncertainty of Photovoltaics for Integration with the Electric Power System  

E-Print Network [OSTI]

and Uncertainty of Photovoltaics for Integration with themodels and datasets. Photovoltaics fall under the broader

Mills, Andrew

2010-01-01T23:59:59.000Z

195

2014-04-30 Public Meeting Agenda: Physical Characterization of Smart and Grid-Connected Commercial and Residential Buildings End-Use Equipment and Appliances  

Broader source: Energy.gov [DOE]

This document is the agenda for the Physical Characterization of Smart and Grid-Connected Commercial and Residential Buildings End-Use Equipment and Appliances public meeting being held on April 30, 2014.

196

High Penetration of Photovoltaic (PV) Systems into the Distribution Grid, Workshop Report, February 24-25, 2009  

SciTech Connect (OSTI)

Outcomes from the EERE Solar Energy Technologies Program workshop on high penetration of photovoltaic (PV) systems into the distribution grid, Feb. 24-25, 2009, Ontario, Calif.

Not Available

2009-06-01T23:59:59.000Z

197

Treatment of Biodiesel Contaminants Through Solar Photo-Fenton Oxidation Using a Stand-Alone Photovoltaic System  

Science Journals Connector (OSTI)

Biodiesel effluents were treated via photo-Fenton oxidation absorbing sunlight through a catalytic reactor connected to a stand-alone photovoltaic system, decreasing of almost 34% the...

Oliveira, Miriam F; Santos, Whelton B; Vieira, Fernando F; Lima, Geralda C; Lima, Carlos P; de Oliveira, Tâmara P

198

Improvement of photovoltaic pumping systems based on standard frequency converters by means of programmable logic controllers  

SciTech Connect (OSTI)

Photovoltaic pumping systems (PVPS) based on standard frequency converters (SFCs) are currently experiencing a growing interest in pumping programmes implemented in remote areas because of their high performance in terms of component reliability, low cost, high power range and good availability of components virtually anywhere in the world. However, in practical applications there have appeared a number of problems related to the adaptation of the SFCs to the requirements of the photovoltaic pumping systems (PVPS). Another disadvantage of dedicated PVPS is the difficulty in implementing maximum power point tracking (MPPT). This paper shows that these problems can be solved through the addition of a basic industrial programmable logic controller (PLC) to the system. This PLC does not increase the cost and complexity of the system, but improves the adaptation of the SFC to the photovoltaic pumping system, and increases the overall performance of the system. (author)

Fernandez-Ramos, Jose [Departamento de Electronica, Universidad de Malaga, Complejo Tecnologico de Teatinos (2.2.39), 29071 Malaga (Spain); Narvarte-Fernandez, Luis; Poza-Saura, Fernando [Instituto de Energia Solar, Universidad Politecnica de Madrid (IES-UPM), Avenida Complutense s/n (204), 28040 Madrid (Spain)

2010-01-15T23:59:59.000Z

199

SOLERAS - Photovoltaic Power Systems Project. Rural solar applications. Final report: project summary  

SciTech Connect (OSTI)

The Saudi Solar Village Project photovoltaic system is described, consisting of 160 arrays, a computerized control system, 1100 kW of electrical storage in lead-acid batteries, and an automatic weather data gathering system. Satisfactory overall system performance is reported. Performance degradation due to dust on the array lenses was determined. Field operational problems are discussed. (LEW)

Not Available

1985-01-01T23:59:59.000Z

200

Sandia National Laboratories: photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

PV Facilities On November 10, 2010, in Photovoltaic System Evaluation Laboratory Distributed Energy Technologies Laboratory Microsystems and Engineering Sciences Applications...

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

City of San Jose - Solar Hot Water Heaters and Photovoltaic Systems Permit  

Broader source: Energy.gov (indexed) [DOE]

San Jose - Solar Hot Water Heaters and Photovoltaic Systems San Jose - Solar Hot Water Heaters and Photovoltaic Systems Permit Requirements City of San Jose - Solar Hot Water Heaters and Photovoltaic Systems Permit Requirements < Back Eligibility Commercial Construction Industrial Installer/Contractor Multi-Family Residential Residential Savings Category Solar Buying & Making Electricity Program Info State California Program Type Solar/Wind Permitting Standards Provider City of San Jose Building, Planning and Electrical Permits are required for Photovoltiac (PV) systems installed in San Jose. In most cases, PV systems must also undergo a Building Plan Review and an Electrical Plan Review. Building Plan Reviews are not required for installations that meet all of the following criteria: 1. Total panel weight (including frame) is not greater than 5 lbs. per

202

Probabilistic Analysis of Rechargeable Batteries in a Photovoltaic Power Supply System  

SciTech Connect (OSTI)

We developed a model for the probabilistic behavior of a rechargeable battery acting as the energy storage component in a photovoltaic power supply system. Stochastic and deterministic models are created to simulate the behavior of the system component;. The components are the solar resource, the photovoltaic power supply system, the rechargeable battery, and a load. Artificial neural networks are incorporated into the model of the rechargeable battery to simulate damage that occurs during deep discharge cycles. The equations governing system behavior are combined into one set and solved simultaneously in the Monte Carlo framework to evaluate the probabilistic character of measures of battery behavior.

Barney, P.; Ingersoll, D.; Jungst, R.; O'Gorman, C.; Paez, T.L.; Urbina, A.

1998-11-24T23:59:59.000Z

203

Remote performance check and automated failure identification for grid-connected PV systems  

E-Print Network [OSTI]

University, Dept. of Physics, Postfach 2503, 26111 Oldenburg; Germany 2 Utrecht University, Copernicus Institute, Dept. of Science, Technology, and Society, Heidelberglaan 2, 3584 CH Utrecht, The Netherlands 3 University of Applied Sciences Magdeburg-Stendal (FH), Institute of Electrical Engineering, Breidscheidstr. 2

Heinemann, Detlev

204

FAILURE DETECTION ROUTINE FOR GRID CONNECTED PV SYSTEMS AS PART OF THE PVSAT-2 PROJECT  

E-Print Network [OSTI]

and Society, Copernicus Institute, Utrecht University, Heidelberglaan 2, 3584 CS Utrecht, the Netherlands Dept. Of Electrical Engineering, University of Applied Science (FH) Magdeburg-Stendal. D-39114

Heinemann, Detlev

205

Producer-Focused Life Cycle Assessment of Thin-Film Silicon Photovoltaic Systems  

E-Print Network [OSTI]

microcrystalline- silicon photovoltaic cell, B) range ofpayback of roof mounted photovoltaic cells. Boustead, I. andmicrocrystalline-silicon photovoltaic cell, B) range of

Zhang, Teresa Weirui

2011-01-01T23:59:59.000Z

206

A Cradle to Grave Framework for Environmental Assessment of Photovoltaic Systems  

E-Print Network [OSTI]

th European Photovoltaic Solar Energy Conference, Barcelona,the 24 th European Photovoltaic Solar Energy Conference andst European Photovoltaic Solar Energy Conference, Dresden,

Zhang, Teresa; Dornfeld, David

2010-01-01T23:59:59.000Z

207

The Impact of Retail Rate Structures on the Economics of Commercial Photovoltaic Systems in California  

E-Print Network [OSTI]

An Assessment of Photovoltaic Energy Availability DuringPhotovoltaic Generation in South Australia. ” Energy Policy,Solar Photovoltaic Cells. ” Center for the Study of Energy

Wiser, Ryan; Mills, Andrew; Barbose, Galen; Golove, William

2007-01-01T23:59:59.000Z

208

The Impact of Retail Rate Structures on the Economics of Commercial Photovoltaic Systems in California  

E-Print Network [OSTI]

An Assessment of Photovoltaic Energy Availability DuringPhotovoltaic Generation in South Australia. ” Energy Policy,Solar Photovoltaic Cells. ” Center for the Study of Energy

Mills, Andrew

2009-01-01T23:59:59.000Z

209

Power Control and Optimization of Photovoltaic and Wind Energy Conversion Systems /  

E-Print Network [OSTI]

and Optimization of Photovoltaic and Wind Energy Conversionand Optimization of Photovoltaic and Wind Energy Conversionpower of Photovoltaic modules and Wind Energy Conversion

Ghaffari, Azad

2013-01-01T23:59:59.000Z

210

The impact of retail rate structures on the economics of commercial photovoltaic systems in California  

E-Print Network [OSTI]

An Assessment of Photovoltaic Energy Availability DuringPhotovoltaic Generation in South Australia. ” Energy Policy,Solar Photovoltaic Cells. ” Center for the Study of Energy

Mills, Andrew D.

2009-01-01T23:59:59.000Z

211

Systems Advisor Model | Department of Energy  

Energy Savers [EERE]

Systems Advisor Model Systems Advisor Model Systems Advisor Model (SAM) makes performance predictions and cost of energy estimates for grid-connected power projects based on...

212

Application of smart grid in photovoltaic power systems, ForskEL (Smart  

Open Energy Info (EERE)

smart grid in photovoltaic power systems, ForskEL (Smart smart grid in photovoltaic power systems, ForskEL (Smart Grid Project) Jump to: navigation, search Project Name Application of smart grid in photovoltaic 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":""}]}

213

Results of testing a development module of the second-generation E-Systems concentrating photovoltaic-thermal module  

SciTech Connect (OSTI)

An actively-cooled linear Fresnel lens concentrating photovoltaic and thermal module, designed and built by E-Systems, was tested in the Photovoltaic Advanced Systems Test Facility. Physical, electrical, and thermal characteristics of the module are presented. Module performance is characterized through the use of multiple linear regression techniques.

Harrison, T D

1982-04-01T23:59:59.000Z

214

Renewable Energy Powered Membrane Technology. 1. Development and Characterization of a Photovoltaic Hybrid Membrane System  

Science Journals Connector (OSTI)

Renewable Energy Powered Membrane Technology. 1. Development and Characterization of a Photovoltaic Hybrid Membrane System ... In isolated communities where potable water sources as well as energy grids are limited or nonexistent, treating brackish groundwater aquifers with small-scale desalination systems can be a viable alternative to existing water infrastructures. ...

A.I. Schäfer; A. Broeckmann; B.S. Richards

2006-12-29T23:59:59.000Z

215

COMPRESSED-AIR ENERGY STORAGE SYSTEMS FOR STAND-ALONE OFF-GRID PHOTOVOLTAIC MODULES  

E-Print Network [OSTI]

COMPRESSED-AIR ENERGY STORAGE SYSTEMS FOR STAND-ALONE OFF-GRID PHOTOVOLTAIC MODULES Dominique materials, flywheels, pumped hydro (PH), superconducting magnetic energy storage (SMES) and compressed air-grid alternative to the large-scale compressed air energy storage systems we propose to examine the viability

Deymier, Pierre

216

Combined Solar and Wind Energy Systems  

Science Journals Connector (OSTI)

In this paper we present the new concept of combined solar and wind energy systems for buildings applications. Photovoltaics (PV) and small wind turbines (WTs) can be install on buildings in case of sufficient wind potential providing the building with electricity. PVs can be combined with thermal collectors to form the hybrid photovoltaic/thermal (PV/T) systems. The PVs (or the PV/Ts) and WT subsystems can supplement each other to cover building electrical load. In case of using PV/T collectors the surplus of electricity if not used or stored in batteries can increase the temperature of the thermal storage tank of the solar thermal unit. The description of the experimental set?up of the suggested PV/T/WT system and experimental results are presented. In PV/T/WT systems the output from the solar part depends on the sunshine time and the output of the wind turbine part depends on the wind speed and is obtained any time of day or night. The use of the three subsystems can cover a great part of building energy load contributing to conventional energy saving and environment protection. The PV/T/WT systems are considered suitable in rural and remote areas with electricity supply from stand?alone units or mini?grid connection. PV/T/WT systems can also be used in typical grid connected applications.

Y. Tripanagnostopoulos; M. Souliotis; Th. Makris

2010-01-01T23:59:59.000Z

217

Recommendations for Maximizing Battery Life in Photovoltaic Systems: A Review of Lessons Learned  

Broader source: Energy.gov [DOE]

Notes, observations and recommendations about the use of batteries in small stand-alone photovoltaic system drawn from over a decade of research at FSEC. The most critical findings were battery life and the importance of an adequate PV array-to-load ratio.

218

Electric Arc Locator in Photovoltaic Power Systems Using Advanced Signal Processing Techniques  

E-Print Network [OSTI]

in detecting the partial discharges associated with the production of an electric arc in a high voltage power in fault detection and localization. In [1] we have shown that electric arc (or partial dischargeElectric Arc Locator in Photovoltaic Power Systems Using Advanced Signal Processing Techniques

Paris-Sud XI, Université de

219

Residential Photovoltaic Energy Systems in California: The Effect on Home Sales Prices  

E-Print Network [OSTI]

Commission (CPUC) "CPUC California Solar Initiative: 2009California has been and continues to be the country’s largest market for photovoltaic solar (solar PV is expanding rapidly in the U.S. Almost 100,000 PV systems have been installed in California

Hoen, Ben

2013-01-01T23:59:59.000Z

220

Impacts of Regional Electricity Prices and Building Type on the Economics of Commercial Photovoltaic Systems  

SciTech Connect (OSTI)

To identify the impacts of regional electricity prices and building type on the economics of solar photovoltaic (PV) systems, 207 rate structures across 77 locations and 16 commercial building types were evaluated. Results for expected solar value are reported for each location and building type. Aggregated results are also reported, showing general trends across various impact categories.

Ong, S.; Campbell, C.; Clark, N.

2012-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Experimental study of a photovoltaic solar-assisted heat-pump/heat-pipe system  

Science Journals Connector (OSTI)

A practical design for a heat pump with heat-pipe photovoltaic/thermal (PV/T) collectors is presented. The hybrid system is called the photovoltaic solar-assisted heat-pump/heat-pipe (PV-SAHP/HP) system. To focus on both actual demand and energy savings, the PV-SAHP/HP system was designed to be capable of operating in three different modes, namely, the heat-pipe, solar-assisted heat pump, and air-source heat-pump modes. Based on solar radiation, the system operates in an optimal mode. A series of experiments were conducted in Hong Kong to study the performance of the system when operating in the heat-pipe and the solar-assisted heat-pump modes. Moreover, energy and exergy analyses were used to investigate the total PV/T performance of the system.

H.D. Fu; G. Pei; J. Ji; H. Long; T. Zhang; T.T. Chow

2012-01-01T23:59:59.000Z

222

Sandia National Laboratories: photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

DOE SunShot Program On November 27, 2013, in Energy, News, News & Events, Partnership, Photovoltaic, Renewable Energy, Solar, Systems Analysis, Systems Engineering On October...

223

Amorphous Silicon-Carbon Nanostructure Photovoltaic Devices  

E-Print Network [OSTI]

reductions in costs for installed photovoltaic systems. Thisreductions in costs for installed photovoltaic systems. Thisphotovoltaic technologies that improve upon current solutions by being lower cost,

Schriver, Maria Christine

2012-01-01T23:59:59.000Z

224

Holistic modelling of a combined Photovoltaic, Wind and Fuel Cell power system  

E-Print Network [OSTI]

Abstract – The research work presented in this paper is focused on the holistic modelling of a combined Photovoltaic (PV), Wind and Fuel Cell, (FC) power system. The modelling approach is based on the Handel C programming language and is using the DK5 modelling / design environment from Mentor Graphics. The aim of the research was to achieve a combined model of a photovoltaic – wind-fuel cell energy system, enabling an holistically optimized digital control system design, followed by its rapid Field Programmable Gate Array (FPGA) prototyping. Initially, the functional simulations of the integrated system were performed, than, the controller design was downloaded in hardware onto a RC10 development board containing a Xilinx Spartan FPGA and was successfully tested experimentally. This approach enables the design and fast hardware implementation of efficient controllers for Distributed Energy Resource (DER) hybrid systems.

A. Tisan; M. Cirstea

225

The Impacts of Commercial Electric Utility Rate Structure Elements on the Economics of Photovoltaic Systems  

Broader source: Energy.gov [DOE]

This analysis uses simulated building data, simulated solar photovoltaic (PV) data, and actual electric utility tariff data from 25 cities to better understand the impacts of different commercial rate structures on the value of solar PV systems. By analyzing and comparing 55 unique rate structures across the United States, this study seeks to identify the rate components that have the greatest effect on the value of PV systems.

226

Proceedings of the flat-plate solar array project research forum on photovoltaic metallization systems  

SciTech Connect (OSTI)

A Photovoltaic Metallization Research Forum, under the sponsorship of the Jet Propulsion Laboratory's Flat-Plate Solar Array Project and the US Department of Energy, was held March 16-18, 1983 at Pine Mountain, Georgia. The Forum consisted of five sessions, covering (1) the current status of metallization systems, (2) system design, (3) thick-film metallization, (4) advanced techniques and (5) future metallization challenges. Twenty-three papers were presented.

None

1983-11-15T23:59:59.000Z

227

The Optimal Power Tracking Control Strategy of Grid-Connected Excited Synchronous Wind Power Generator.  

E-Print Network [OSTI]

??In this thesis, the wind power system is a coaxial coupling structure between servo motor and excited synchronous wind power generator. By using the excited… (more)

Cheng, Wen-kai

2014-01-01T23:59:59.000Z

228

Review of combined photovoltaic/thermal collector: solar assisted heat pump system options  

SciTech Connect (OSTI)

The advantages of using photovoltaic (PV) and combined photovoltaic/thermal (PV/T) collectors in conjunction with residential heat pumps are examined. The thermal and electrical power requirements of similar residences in New York City and Fort Worth are the loads under consideration. The TRNSYS energy balance program is used to simulate the operations of parallel, series, and cascade solar assisted heat pump systems. Similar work involving exclusively thermal collectors is reviewed, and the distinctions between thermal and PV/T systems are emphasized. Provided the defrost problem can be satisfactorily controlled, lifecycle cost analyses show that at both locations the optimum collector area is less than 50 m/sup 2/ and that the parallel system is preferred.

Sheldon, D.B.; Russell, M.C.

1980-01-01T23:59:59.000Z

229

Understanding Variability and Uncertainty of Photovoltaics for Integration with the Electric Power System  

E-Print Network [OSTI]

variability of photovoltaic (PV) plants to avoid unnecessaryhowever, occurs within PV plants. The degree of smoothingof photovoltaic (PV) plants. The workshop brought together

Mills, Andrew

2010-01-01T23:59:59.000Z

230

Potential benefits of and barriers to inter-country power grid connections in Northeast Asia  

Science Journals Connector (OSTI)

The current state and prospects of the power industry in Northeast Asia (NEA) are outlined. The potential benefits from power system interconnection in the region, in particular capacity saving, decreasing electricity production costs and tariffs, reliability improvement and environmental effect are considered. Specific estimates of the benefits for the region are given. Barriers to power system interconnection in NEA are analysed.

L.S. Belyaev; G.F. Kovalev; S.V. Podkovalnikov

2003-01-01T23:59:59.000Z

231

Performance testing and economic analysis of a photovoltaic flywheel energy storage and conversion system  

SciTech Connect (OSTI)

A subscale prototype of a flywheel energy storage and conversion system for use with photovoltaic power systems of residential and intermediate load-center size has been designed, built and tested by MIT Lincoln Laboratory. System design, including details of such key components as magnetic bearings, motor generator, and power conditioning electronics, is described. Performance results of prototype testing are given and indicate that this system is the equal of or superior to battery-inverter systems for the same application. Results of cost and user-worth analysis show that residential systems are economically feasible in stand-alone and in some utility-interactive applications.

Hay, R.D.; Millner, A.R.; Jarvinen, P.O.

1980-01-01T23:59:59.000Z

232

Renewable energy powered membrane technology. 2. The effect of energy fluctuations on performance of a photovoltaic hybrid membrane system   

E-Print Network [OSTI]

This paper reports on the performance fluctuations during the operation of a batteryless hybrid ultrafiltration – nanofiltration / reverse osmosis (UF-NF/RO) membrane desalination system powered by photovoltaics treating ...

Richards, B.S.; Capăo, D.P.S.; Schäfer, Andrea

2008-01-01T23:59:59.000Z

233

Design and Simulation for a Solar House with Building Integrated Photovoltaic-Thermal System and Thermal Storage  

Science Journals Connector (OSTI)

Building integrated photovoltaic-thermal systems (BIPV/T) that pre-heat ambient air may be used in combination with ventilated concrete slabs for thermal storage purposes. This is one of many feasible ways to ...

YuXiang Chen; A. K. Athienitis; K. E. Galal…

2009-01-01T23:59:59.000Z

234

Stabilisation of grid connected wind farms using doubly-fed induction generators with FACTS controllers  

Science Journals Connector (OSTI)

The impact of the wind generation on the power systems is no longer negligible if high penetration levels are going to be achieved. It is very important to boost the transfer capability of the transmission system while improving the utilisation of transmission assets to accommodate high penetration of wind power on the network. Hence, more sophisticated control schemes using advanced power electronic-based flexible AC transmission system (FACTS) controllers are required which will enhance voltage security and voltage stability control. This paper presents the impact of FACTS controllers on the dynamic stability of power systems connected with wind energy conversion systems. The wind farm model considered is a variable speed doubly-fed induction generator model. The dynamic simulation results yield information on: 1) the impact of faults and wind speed changes on the performance of DFIG-based induction generators; 2) the change in controllable parameters of the FACTS controllers following the faults and wind speed changes; 3) transient rating of the FACTS controllers for enhancement of rotor speed stability of induction generators and angle stability of synchronous generators.

N. Senthil Kumar

2013-01-01T23:59:59.000Z

235

Optimization of a photovoltaic pumping system based on the optimal control theory  

SciTech Connect (OSTI)

This paper suggests how an optimal operation of a photovoltaic pumping system based on an induction motor driving a centrifugal pump can be realized. The optimization problem consists in maximizing the daily pumped water quantity via the optimization of the motor efficiency for every operation point. The proposed structure allows at the same time the minimization the machine losses, the field oriented control and the maximum power tracking of the photovoltaic array. This will be attained based on multi-input and multi-output optimal regulator theory. The effectiveness of the proposed algorithm is described by simulation and the obtained results are compared to those of a system working with a constant air gap flux. (author)

Betka, A.; Attali, A. [Laboratoire de Genie Electrique de Biskra (LGEB), Electrical Engineering Department, University of Biskra (Algeria)

2010-07-15T23:59:59.000Z

236

Solar Photovoltaic Electricity  

Science Journals Connector (OSTI)

Most solar photovoltaic systems use 12 V deep cycle ... voltage, or combined in parallel for greater capacity without changing the voltage. The batteries used...

Ramchandra Pode; Boucar Diouf

2011-01-01T23:59:59.000Z

237

Sandia National Laboratories: photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Power Systems On February 6, 2012, in Energy, News, News & Events, Partnership, Photovoltaic, Renewable Energy, Solar Consistent appraisals of homes and businesses...

238

System for characterizing semiconductor materials and photovoltaic device  

DOE Patents [OSTI]

Apparatus for detecting and mapping defects in the surfaces of polycrystalline material in a manner that distinguishes dislocation pits from grain boundaries includes a first laser of a first wavelength for illuminating a wide spot on the surface of the material, a second laser of a second relatively shorter wavelength for illuminating a relatively narrower spot on the surface of the material, a light integrating sphere with apertures for capturing light scattered by etched dislocation pits in an intermediate range away from specular reflection while allowing light scattered by etched grain boundaries in a near range from specular reflection to pass through, and optical detection devices for detecting and measuring intensities of the respective intermediate scattered light and near specular scattered light. A center blocking aperture or filter can be used to screen out specular reflected light, which would be reflected by nondefect portions of the polycrystalline material surface. An X-Y translation stage for mounting the polycrystalline material and signal processing and computer equipment accommodate raster mapping, recording, and displaying of respective dislocation and grain boundary defect densities. A special etch procedure is included, which prepares the polycrystalline material surface to produce distinguishable intermediate and near specular light scattering in patterns that have statistical relevance to the dislocation and grain boundary defect densities. A reflectance measurement of the piece of material is obtained by adding together the signals from the optical detection devices. In the case where the piece of material includes a photovoltaic device, the current induced in the device by the illuminating light can be measured with a current sensing amplifier after the light integrating sphere is moved away from the device. 22 figs.

Sopori, B.L.

1996-12-03T23:59:59.000Z

239

The Prospects for Photovoltaics in Mexico  

Science Journals Connector (OSTI)

Prospects for photovoltaics in Mexico are reviewed in relation to the activities in R & V, commercial and demonstration photovoltaic systems, commerce and industry.

E. J. Perez; J. L. Del Valle

1981-01-01T23:59:59.000Z

240

Solar Concentrators: Using Optics to Boost Photovoltaics  

Science Journals Connector (OSTI)

The use of solar energy requires optimizing each part of a photovoltaic system: collection optics, the photovoltaic array, switches, controllers, current inverters, storage devices...

Coffey, Valerie C

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

System design, test results, and economic analysis of a flywheel energy storage and conversion system for photovoltaic applications  

SciTech Connect (OSTI)

MIT Lincoln Laboratory is developing a flywheel interface and storage system for use with photovoltaic power sources. Test data on the performance of components built to investigate the feasibility of such a system, and the results of economic studies of the system showing user-worth analysis and manufacturing-cost estimates, are presented. The system has magnetic bearings, a maximum-power-point tracker, DC input, and cycloconverter output from an ironless-armature motor-generator.

Millner, A.R.; Dinwoodie, T.

1980-01-01T23:59:59.000Z

242

Estimating the maximum potential revenue for grid connected electricity storage : arbitrage and regulation.  

SciTech Connect (OSTI)

The valuation of an electricity storage device is based on the expected future cash ow generated by the device. Two potential sources of income for an electricity storage system are energy arbitrage and participation in the frequency regulation market. Energy arbitrage refers to purchasing (stor- ing) energy when electricity prices are low, and selling (discharging) energy when electricity prices are high. Frequency regulation is an ancillary service geared towards maintaining system frequency, and is typically procured by the independent system operator in some type of market. This paper outlines the calculations required to estimate the maximum potential revenue from participating in these two activities. First, a mathematical model is presented for the state of charge as a function of the storage device parameters and the quantities of electricity purchased/sold as well as the quantities o ered into the regulation market. Using this mathematical model, we present a linear programming optimization approach to calculating the maximum potential revenue from an elec- tricity storage device. The calculation of the maximum potential revenue is critical in developing an upper bound on the value of storage, as a benchmark for evaluating potential trading strate- gies, and a tool for capital nance risk assessment. Then, we use historical California Independent System Operator (CAISO) data from 2010-2011 to evaluate the maximum potential revenue from the Tehachapi wind energy storage project, an American Recovery and Reinvestment Act of 2009 (ARRA) energy storage demonstration project. We investigate the maximum potential revenue from two di erent scenarios: arbitrage only and arbitrage combined with the regulation market. Our analysis shows that participation in the regulation market produces four times the revenue compared to arbitrage in the CAISO market using 2010 and 2011 data. Then we evaluate several trading strategies to illustrate how they compare to the maximum potential revenue benchmark. We conclude with a sensitivity analysis with respect to key parameters.

Byrne, Raymond Harry; Silva Monroy, Cesar Augusto.

2012-12-01T23:59:59.000Z

243

Grid Connected based PWM Converter Applied a Self-excited Induction Generator for Wind Turbine Applications  

Science Journals Connector (OSTI)

Abstract This paper presents the electrical power conversion system which is developed for a self-excited induction generator in order to apply with wind turbine. In the wind energy conversion system, a self-excited induction generator is converted the mechanical energy into electrical energy. A B6 rectifier and capacitor are utilized to maintain constant intermediate DC voltage. The average power is converted entirely by the PWM converter, consists of B6 voltage-source inverters. Output currents and active power of switch mode voltage source inverter are flowed into utility grid by current control and PQ theory technique. For the hardware implementation, the system consists of 1 kW four poles self excited induction generator and the voltage source inverter controlled output current by hysteresis controller(bang-bang) method. The algorithm is implemented in a dSPACS ds1104DSP together with MATLAB/SIMULINK program. The validity of the proposed method is verified by both simulation and experimental results under power transferred into grid in term of power quality such as real power, reactive power, total harmonics distortion, and so on.

Satean Tunyasrirut; Chakrapong Charumit

2014-01-01T23:59:59.000Z

244

A review of solar photovoltaic technologies  

Science Journals Connector (OSTI)

Global environmental concerns and the escalating demand for energy, coupled with steady progress in renewable energy technologies, are opening up new opportunities for utilization of renewable energy resources. Solar energy is the most abundant, inexhaustible and clean of all the renewable energy resources till date. The power from sun intercepted by the earth is about 1.8 × 1011 MW, which is many times larger than the present rate of all the energy consumption. Photovoltaic technology is one of the finest ways to harness the solar power. This paper reviews the photovoltaic technology, its power generating capability, the different existing light absorbing materials used, its environmental aspect coupled with a variety of its applications. The different existing performance and reliability evaluation models, sizing and control, grid connection and distribution have also been discussed.

Bhubaneswari Parida; S. Iniyan; Ranko Goic

2011-01-01T23:59:59.000Z

245

NREL: Photovoltaics Research - Company Partners in Photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Company Partners in Photovoltaic Manufacturing R&D Company Partners in Photovoltaic Manufacturing R&D More than 40 private-sector companies partnered with NREL on successful efforts within the PV Manufacturing R&D Project. They included manufacturers of crystalline silicon, thin-film, and concentrator solar technologies. The companies are listed below. Advanced Energy Systems Alpha Solarco ASE Americas AstroPower/GE Energy Boeing Aerospace BP Solar Cronar Crystal Systems Dow Corning Energy Conversion Devices Energy Photovoltaics ENTECH Evergreen Solar First Solar Glasstech Solar Global Photovoltaic Specialists Global Solar Energy Golden Photon Iowa Thin Film Technologies ITN Energy Systems Kopin Mobil Solar Energy Omnion Power Engineering Photon Energy Photovoltaics International PowerLight RWE Schott Solar/Schott Solar

246

Review of grid connection requirements for generation assets in weak power grids  

Science Journals Connector (OSTI)

Abstract The integration of variable energy sources in weak power grids poses many technical and economic challenges. Both aspects have an impact on the development of grid codes, that is worth analysing. Grid codes shall be adapted to technical constraints in the corresponding power grid, such as the network strength and the characteristics of generation technologies. This paper reviews and compares technical requirements imposed on to generation assets in countries with very distinct characteristics, in order to analyse the influence of weakness and isolation of a power grid on the interconnection conditions imposed by system operators to grid users. Current and future regulation aspects are covered.

Agurtzane Etxegarai; Pablo Eguia; Esther Torres; Araitz Iturregi; Victor Valverde

2015-01-01T23:59:59.000Z

247

An Analysis of the Effects of Residential Photovoltaic Energy Systems on  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

An Analysis of the Effects of Residential Photovoltaic Energy Systems on An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California Title An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California Publication Type Report Refereed Designation Unknown Year of Publication 2011 Authors Hoen, Ben, Ryan H. Wiser, Peter Cappers, and Mark Thayer Pagination 60 Date Published 04/2011 Publisher LBNL City Berkeley Keywords electricity markets and policy group, energy analysis and environmental impacts department, photovoltaics, property values, public acceptance Abstract The Working Group III Special Report on Renewable Energy Sources and Climate Change Mitigation (SRREN) presents an assessment of the literature on the scientific, technological, environmental, economic and social aspects of the contribution of six renewable energy (RE) sources to the mitigation of climate change. It is intended to provide policy relevant information to governments, intergovernmental processes and other interested parties. This Summary for Policymakers provides an overview of the SRREN, summarizing the essential findings. The SRREN consists of 11 chapters. Chapter 1 sets the context for RE and climate change; Chapters 2 through 7 provide information on six RE technologies, and Chapters 8 through 11 address integrative issues. References to chapters and sections are indicated with corresponding chapter and section numbers in square brackets. An explanation of terms, acronyms and chemical symbols used in this SPM can be found in the glossary of the SRREN (Annex I).Conventions and methodologies for determining costs, primary energy and other topics of analysis can be found in Annex II and Annex III. This report communicates uncertainty where relevant.

248

Residential Photovoltaic Energy Systems in California: The Effect on Home Sales Prices  

E-Print Network [OSTI]

ABSTRACT Relatively little research exists estimating the marginal impacts of photovoltaic (PV) energy

Hoen, Ben

2014-01-01T23:59:59.000Z

249

Procedure for Measuring and Reporting the Performance of Photovoltaic Systems in Buildings  

SciTech Connect (OSTI)

This procedure provides a standard method for measuring and characterizing the long-term energy performance of photovoltaic (PV) systems in buildings and the resulting implications to the building's energy use. The performance metrics determined here may be compared against benchmarks for evaluating system performance and verifying that performance targets have been achieved. Uses may include comparison of performance with the design intent; comparison with other PV systems in buildings; economic analysis of PV systems in buildings; and the establishment of long-term performance records that enable maintenance staff to monitor trends in energy performance.

Pless, S.; Deru, M.; Torcellini, P.; Hayter, S.

2005-10-01T23:59:59.000Z

250

Harmonic and interharmonic distortion analysis in the grid-connected wind electric generator  

Science Journals Connector (OSTI)

The operation of wind turbines has an impact on the power quality at the connected electric network. The integration of wind electric generators with the power grid becomes a headache for power engineers in several aspects. Harmonic distortion is one of the most important phenomena which affect the grid performance. This paper provides an in-depth discussion on harmonic and interharmonic distortion taking place on the low-voltage side of the wind generator, as well as in the power grid side. A case study, to determine where a significant amount of harmonic currents or voltages exists in the system, is performed using a power quality analyser. From these measurements and subsequent calculations, the levels of harmonics and interharmonics are analysed. It is found that the harmonic distortion is invariably present on the generator side as well as on the grid side, depending on the wind turbine technology.

V. Suresh Kumar; P.S. Kannan

2007-01-01T23:59:59.000Z

251

Fault response of inverter interfaced distributed generators in grid-connected applications  

Science Journals Connector (OSTI)

Abstract Inverter-interfaced distributed generation is prominent in some distribution networks because of the growth of PV and other new sources. In order to ensure that protection system design remains effective in this environment, it is essential to be able to accurately represent inverters in fault current calculations. Calculating the fault current contribution is complicated because of the nature of the transition into current limiting mode and because the current produced is a function of control choices as well as physical components. The desire is for a simple source plus impedance model for incorporation into network studies. Based on knowledge of the control strategy and the details of the method of current limiting, linear analytical equivalent models are proposed whose source and impedance values (at fundamental frequency) can be expressed as a function of the inverter's hardware parameters and controller gains. The dependence of the entry into current limit on the nature and location of other generators in the network leads to a proposal for a load flow based fault analysis incorporating the new models. This iteratively determines which inverter experiences current limiting. The proposed inverter fault models and their use in a network fault analysis have been verified against experimental results in a 3-inverter network.

Cornelis A. Plet; Timothy C. Green

2014-01-01T23:59:59.000Z

252

Testing and evaluation of a solar photovoltaic flywheel energy storage system  

SciTech Connect (OSTI)

A thorough series of experimental measurements are reported that have been made on a 1/10-scale, magnetically levitated, residential solar photovoltaic (PV) flywheel energy storage system which acts as a complete interface between a solar PV array and an ac load. The overall in-out electrical storage efficiency of the flywheel unit was measured along with the power-transfer efficiencies of individual components and the system spin-down tare losses. An overall storage efficiency of 82% was measured for the flywheel storage system when operated in a utility-interactive mode.

Jarvinen, P. O.; Brench, B. L.; Hay, R. D.; Rasmussen, N. E.

1981-01-01T23:59:59.000Z

253

Solar Leasing for Residential Photovoltaic Systems (Fact Sheet)  

SciTech Connect (OSTI)

This publication examines the solar lease option for residential PV systems and describes two solar lease programs already in place.

Not Available

2009-02-01T23:59:59.000Z

254

Power Systems Integration Laboratory (Fact Sheet)  

SciTech Connect (OSTI)

This fact sheet describes the purpose, lab specifications, applications scenarios, and information on how to partner with NREL's Power Systems Integration Laboratory at the Energy Systems Integration Facility. At NREL's Power Systems Integration Laboratory in the Energy Systems Integration Facility (ESIF), research focuses on developing and testing large-scale distributed energy systems for grid-connected, stand-alone, and microgrid applications. The laboratory can accommodate large power system components such as inverters for photovoltaic (PV) and wind systems, diesel and natural gas generators, battery packs, microgrid interconnection switchgear, and vehicles. Closely coupled with the research electrical distribution bus at the ESIF, the Power Systems Integration Laboratory will offer power testing capability of megawatt-scale DC and AC power systems, as well as advanced hardware-in-the-loop and model-in-the-loop simulation capabilities. Thermal heating and cooling loops and fuel also allow testing of combined heating/cooling and power systems (CHP).

Not Available

2011-10-01T23:59:59.000Z

255

Photovoltaics Manufacturing in Developing Countries  

Science Journals Connector (OSTI)

The need for energy sources in the developing countries might be partially satisfied by using photovoltaic power systems in addition to conventional means. A review of photovoltaic manufacturing in developing ...

G. Darkazalli; S. Hogan

1991-01-01T23:59:59.000Z

256

April 30 Public Meeting: Physical Characterization of Smart and Grid-Connected Commercial and Residential Building End-Use Equipment and Appliances  

Broader source: Energy.gov [DOE]

These documents contain slide decks presented at the Physical Characterization of Smart and Grid-Connected Commercial and Residential Buildings End-Use Equipment and Appliances public meeting held on April 30, 2014. The first document includes the first presentation from the meeting: DOE Vision and Objectives. The second document includes all other presentations from the meeting: Terminology and Definitions; End-User and Grid Services; Physical Characterization Framework; Value, Benefits & Metrics.

257

Road to very large scale photovoltaic power generation systems  

Science Journals Connector (OSTI)

Große Photovoltaiksysteme zur Energieerzeugung im Giga-Watt-Bereich stellen eine vielversprechende Lösung für eine breite Weiterentwicklung der Photovoltaiktechnologie dar. Diese Systeme könnten in Zukunft auc...

K. Komoto

2009-08-01T23:59:59.000Z

258

Solar integration: applying hybrid photovoltaic/thermal systems.  

E-Print Network [OSTI]

??On-site energy production is becoming increasingly prevalent in building systems design with a renewed public awareness of sustainability, decreased energy resources, and an increase in… (more)

Williams, Kristen

2010-01-01T23:59:59.000Z

259

Environmental and economic analysis of building integrated photovoltaic systems in Italian regions  

Science Journals Connector (OSTI)

Abstract Solar energy is a form of renewable energy that can be used to combat climate change through an environmentally accepted energy supply policy with support from both private and public consumers. There are numerous factors contributing to the definition of the economic and environmental performance of solar energy investments, such as average annual irradiation, consumers' consumption, Feed in Tariff incentive system, energy portfolio, emissions produced by the photovoltaic system, rated power of the individual modules, disposable income of the investor, availability of surface for the installation of the photovoltaic panels and mission, that characterise the project (environmental maximisation, economic maximisation or self-sufficiency of the system during the first year). Given the particular geographical position of Italy, the economic profitability and environmental impact of such system were estimated, first on the provincial scale and then on the regional scale, to delineate the general characteristics that are not caused by a single scenario. The indicators used include the following: net present value (NPV), internal rate of return (IRR), discounted payback period (DPbP), discounted aggregate cost-benefit ratio (BCr) and reduction of emissions of carbon dioxide (ERcd). The ultimate objective of the paper is to define the number of photovoltaic (PV) systems necessary to reach the target of renewable energy production in the above settings. A general scenario appropriate to achieve this goal, as well as implementing the total wealth generated by this framework and the reduction of CO2 emissions resulting from the implementation of that plan, will be examined. The indicators used are total net present value per capita and reduction of carbon dioxide emissions per capita.

Federica Cucchiella; Idiano D'Adamo; S.C. Lenny Koh

2013-01-01T23:59:59.000Z

260

Status of DOE and AID stand-alone photovoltaic system field tests  

SciTech Connect (OSTI)

The NASA Lewis Research Center (LeRC) is managing stand-alone photovoltaic (PV) system projects sponsored by the U.S. Department of Energy (DOE) and the U.S. Agency for International Development (AID). The DOE project includes village PV power demonstration projects in Gabon (four sites) and the Marshall Islands, and PV-powered vaccine refrigerator systems in six countries. The AID project includes a large village power system, a farmhouse system and two water pumping-irrigation systems in Tunisia, a water pumping/grain grinding system in Upper Volta, five medical clinic systems in four countries, PV-powered vaccine refrigerator systems in 18 countries and a PVpowered remote earth station in Indonesia. This paper reviews these PV projects and summarizes significant findings to date.

Bifano, W.J.; DeLombard, R.; Ratajczak, A.F.; Scudder, L.R.

1984-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Multilevel Converter Topologies for Utility Scale Solar Photovoltaic Power Systems  

E-Print Network [OSTI]

and phase angle of the inverter cells is proposed. This improves differential power processing amongst cells while keeping the voltage and current ratings of the devices low. A battery energy storage system for the multilevel PV converter has also been...

Essakiappan, Somasundaram

2014-04-30T23:59:59.000Z

262

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

SciTech Connect (OSTI)

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

263

Photovoltaic Power Systems: A Tour Through the Alternatives  

Science Journals Connector (OSTI)

...clean-639 ing difficulties, and life expectancies is inadequate to permit...are usually not serious problems for gas utili-ties or oil delivery systems...obsolete before the end of its productive life as a result of progress in manufactur-ing...

Henry Kelly

1978-02-10T23:59:59.000Z

264

Study Guide for Photovoltaic System Installers and Sample Examination Questions  

Broader source: Energy.gov [DOE]

This study guide presents some of the basic cognitive material that individuals who install and maintain PV systems should understand. This information is intended primarily as a study guide to help better prepare for the NABCEP PV installer examination but does not provide all of the information needed for completing the certification examination.

265

Distributed generation with photovoltaic systems: A utility perspective  

SciTech Connect (OSTI)

Today PV power systems are already cost-effective and commonly employed in a wide range of remote applications such as electricity supply to isolated users and small communities; water pumping and desalination; powering of service equipment such as radio repeaters; pipelines and well-heads cathodic protection. PV systems can easily cover a broad range of power requirements, allowing them to take advantage of new niche markets as they develop. Besides such applications a ``non-power'', low performance, consumer market also exists (watches, calculators, gadgets) that has already reached a stable growth condition. In the last decade, an increase has been experienced of about three times in the amount of module shipments (103 MW expected in 1997), a more balanced regional manufacturer share has developed, crystalline technology has maintained its lead, and a more market-oriented application share has appeared (at present most applications are for stand-alone).

Vigotti, R.

1998-07-01T23:59:59.000Z

266

EELE408 Photovoltaics Lecture 22: Grid Tied Systems  

E-Print Network [OSTI]

48 Volt Battery Backup 23 Inverter and Charge Controller 24 #12;5 Inverter 25 Read-out 26 New solar Specifications ­ Rated Power = 6,750 W ­ 30 panels: SunPower 225 ­ Inverter: SPR 7000m · 7000 W · Price Estimate/Garage #3 · System Specifications ­ Rated Power = 10,080 W ­ 48 panels: Kyrocera 210 ­ Inverter: Fronius IG

Kaiser, Todd J.

267

Efficient design of desalination system using photovoltaic and packed bed systems  

SciTech Connect (OSTI)

This work presents a new way to realize continuous operation of a solar desalination system to produce fresh water using solar energy for a dual purpose. Here, solar energy is used directly as heat energy through solar radiation incident on an inverse V-shape still cover during sunlight hours. At the same time, the solar energy can be converted through a photovoltaic (PV) array into electric energy, which is stored in the battery system during sunlight hours. To realize the continuity of still operation daily and overnight, the batteries are discharged during the night at a suitable rate to feed an electric heater. The electric heater is designed to generate the required heat for desalination during the night. The heat is equivalent to that which can be absorbed during the day and that gives the temperature difference to gain evaporation and fresh water (productivity). This modified still is provided with a packed bed layer installed in the bottom of the basin to assist the system during the day and at night, i.e., this modified still will be more efficient. The quantity of heat energy during the night is adjusted to give a saline water temperature in the range that occurs in the actual solar still during sunlight hours. The performance of all components of the present still are discussed. The use of PV and backed bed systems means higher efficiency than the passive still, as the modified still produces large quantities of fresh water in August for a saline water depth of 0.01 m by using glass wool insulation 0.05 m thick and glass spheres as a packed bed with 0.0213 m bed length.

Fahmy, F.H.; Abdel-Rehim, Z.S. [National Research Center, Cairo (Egypt)

1998-08-01T23:59:59.000Z

268

A Cradle to Grave Framework for Environmental Assessment of Photovoltaic Systems  

E-Print Network [OSTI]

from the solar energy technologies,” Energy Policy, vol. 33,solar footprint for photovoltaic generation in the United States,” Energy Policy,

Zhang, Teresa; Dornfeld, David

2010-01-01T23:59:59.000Z

269

An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Energy Markets and Policy Group * Energy Analysis Department Energy Markets and Policy Group * Energy Analysis Department An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California Ben Hoen, Peter Cappers, Mark Thayer, Ryan Wiser Lawrence Berkeley National Laboratory LBNL Webinar June 9 th , 2011 This work was supported by the Office of Energy Efficiency and Renewable Energy (Solar Energy Technologies Program) of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, by the National Renewable Energy Laboratory under Contract No. DEK-8883050, and by the Clean Energy States Alliance.

270

SunShot Initiative: Organic Photovoltaics Research  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Organic Photovoltaics Research to Organic Photovoltaics Research to someone by E-mail Share SunShot Initiative: Organic Photovoltaics Research on Facebook Tweet about SunShot Initiative: Organic Photovoltaics Research on Twitter Bookmark SunShot Initiative: Organic Photovoltaics Research on Google Bookmark SunShot Initiative: Organic Photovoltaics Research on Delicious Rank SunShot Initiative: Organic Photovoltaics Research on Digg Find More places to share SunShot Initiative: Organic Photovoltaics Research on AddThis.com... Concentrating Solar Power Photovoltaics Research & Development Crystalline Silicon Thin Films Multijunctions Organic Photovoltaics Dye-Sensitized Solar Cells Competitive Awards Systems Integration Balance of Systems Organic Photovoltaics Research Graphic showing the seven layers of an organic PV cell: electrode, donor, acceptor, active layer, PEDOT:PSS, transparent conductive oxide, and glass.

271

Microsystems Enabled Photovoltaics  

ScienceCinema (OSTI)

Sandia's microsystems enabled photovoltaic advances combine mature technology and tools currently used in microsystem production with groundbreaking advances in photovoltaics cell design, decreasing production and system costs while improving energy conversion efficiency. The technology has potential applications in buildings, houses, clothing, portable electronics, vehicles, and other contoured structures.

Gupta, Vipin; Nielson, Greg; Okandan, Murat, Granata, Jennifer; Nelson, Jeff; Haney, Mike; Cruz-Campa, Jose Luiz

2014-06-23T23:59:59.000Z

272

Reliability analysis of solar photovoltaic system using hourly mean solar radiation data  

SciTech Connect (OSTI)

This paper presents the hourly mean solar radiation and standard deviation as inputs to simulate the solar radiation over a year. Monte Carlo simulation (MCS) technique is applied and MATLAB program is developed for reliability analysis of small isolated power system using solar photovoltaic (SPV). This paper is distributed in two parts. Firstly various solar radiation prediction methods along with hourly mean solar radiation (HMSR) method are compared. The comparison is carried on the basis of predicted electrical power generation with actual power generated by SPV system. Estimation of solar photovoltaic power using HMSR method is close to the actual power generated by SPV system. The deviation in monsoon months is due to the cloud cover. In later part of the paper various reliability indices are obtained by HMSR method using MCS technique. Load model used is IEEE-RTS. Reliability indices, additional load hours (ALH) and additional power (AP) reduces exponentially with increase in load indicates that a SPV source will offset maximum fuel when all of its generated energy is utilized. Fuel saving calculation is also investigated. Case studies are presented for Sagardeep Island in West Bengal state of India. (author)

Moharil, Ravindra M. [Department of Electrical Engineering, Yeshwantrao Chavan College of Engineering, Nagpur, Maharashtra (India); Kulkarni, Prakash S. [Department of Electrical Engineering, Visvesvaraya National Institute of Technology, South Ambazari Road, Nagpur 440011, Maharashtra (India)

2010-04-15T23:59:59.000Z

273

Performance and Economic Analysis of Distributed Power Electronics in Photovoltaic Systems  

SciTech Connect (OSTI)

Distributed electronics like micro-inverters and DC-DC converters can help recover mismatch and shading losses in photovoltaic (PV) systems. Under partially shaded conditions, the use of distributed electronics can recover between 15-40% of annual performance loss or more, depending on the system configuration and type of device used. Additional value-added features may also increase the benefit of using per-panel distributed electronics, including increased safety, reduced system design constraints and added monitoring and diagnostics. The economics of these devices will also become more favorable as production volume increases, and integration within the solar panel?s junction box reduces part count and installation time. Some potential liabilities of per-panel devices include increased PV system cost, additional points of failure, and an insertion loss that may or may not offset performance gains under particular mismatch conditions.

Deline, C.; Marion, B.; Granata, J.; Gonzalez, S.

2011-01-01T23:59:59.000Z

274

Do Photovoltaic Energy Systems Effect Residential Selling Prices? Results from a California Statewide Investigation.  

SciTech Connect (OSTI)

An increasing number of homes in the U.S. have sold with photovoltaic (PV) energy systems installed at the time of sale, yet relatively little research exists that provides estimates of the marginal impacts of those PV systems on home sale prices. This research analyzes a large dataset of California homes that sold from 2000 through mid-2009 with PV installed. We find strong evidence that homes with PV systems sold for a premium over comparable homes without PV systems during this time frame. Estimates for this premium expressed in dollars per watt of installed PV range, from roughly $4 to $6.4/watt across the full dataset, to approximately $2.3/watt for new homes, to more than $6/watt for existing homes. A number of ideas for further research are suggested.

Hoen, Ben; Cappers, Pete; Wiser, Ryan; Thayer, Mark

2011-04-12T23:59:59.000Z

275

--No Title--  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

advanced structural insulated panel systems, insulated precast concrete walls, a heat pump water heater, geothermal systems, grid-connected solar photovoltaics, adaptive...

276

Adaptive fuzzy logic control based optimal Hopfield neural network of standalone photovoltaic system with battery storage  

Science Journals Connector (OSTI)

This paper presents the optimized Hopfield Neural Network (HFNN) based Fuzzy Logic Control (FLC) Maximum Power Tracking structure for a renewable Photovoltaic (PV) system under changing climatic conditions. Changing climatic condition of photovoltaic panel yield multiple local and global maximum power points which creates tracing of the extreme power which is a problematic task. Most of existing traditional techniques fail to operate accurately under this changing weather condition. This paper advances the technique by considering wide search and changing climate so that the designed HFNN trace the maximum power for the entire situation. It is verified for dissimilar weather condition through simulation and proved experimentally. In this paper the major merit of using optimized new FLC is also presented. HFNN neurons are optimized using new FLC. Comparative tests have been conducted for conventional Perturb and Observe and Incremental Conductance methods. From the outcomes of the simulation results it is measured that the HFNN technique decreases error and it contributes quick reaction to climatic variations. Moreover it does not need any external fine-tuning of the structure unlike existing traditional FLC technique wherein the regulator gain components want to be altered when solar illumination varies.

2014-01-01T23:59:59.000Z

277

Electric grid dependence on the configuration of a small-scale wind and solar power hybrid system  

Science Journals Connector (OSTI)

Results are presented from the modeling of a small-scale distributed power system containing power demands, photovoltaic arrays, small-scale wind turbines and an electric grid connection. Detailed models of the photovoltaic array and the wind turbine are briefly explained in addition to the solar and wind recourse models. A subunit is defined to consist of a power demand together with power contributors. It is shown how the grid dependency (or renewable energy contribution) is affected by the connection of subunits and according to the relationship between the power demand patterns and renewable resource patterns. The outcome from several case studies is presented using simulated power demands and renewable resources. In a scenario with subunit power demands characteristic for a large household and a small factory, it is shown that the coupling of subunits reduces annual grid power transfers by more than 10% and increases the renewable power contribution to the demand by almost 7%.

M. Mikati; M. Santos; C. Armenta

2013-01-01T23:59:59.000Z

278

SunShot Initiative: Reducing Photovoltaic Costs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Reducing Photovoltaic Costs to Reducing Photovoltaic Costs to someone by E-mail Share SunShot Initiative: Reducing Photovoltaic Costs on Facebook Tweet about SunShot Initiative: Reducing Photovoltaic Costs on Twitter Bookmark SunShot Initiative: Reducing Photovoltaic Costs on Google Bookmark SunShot Initiative: Reducing Photovoltaic Costs on Delicious Rank SunShot Initiative: Reducing Photovoltaic Costs on Digg Find More places to share SunShot Initiative: Reducing Photovoltaic Costs on AddThis.com... Concentrating Solar Power Photovoltaics Research & Development Competitive Awards Systems Integration Balance of Systems Reducing Photovoltaic Costs Photo of gloved hands pouring liquid from a glass bottle to glass beaker. Past Incubator awardee, Innovalight, is creating high-efficiency, low-cost

279

Economic evaluation of a residential photovoltaic system based on a probability model using actual meteorological data  

SciTech Connect (OSTI)

To design a photovoltaic (PV) generation system economically, it is necessary to use date of the total insolation on a horizontal surface. However, such data is only the total daily values and does not represent the power variation caused by the cloud cover. This paper presents the probability method which represents not only the average but also the variance of the PV generation power, and shows simulated results using this methodology. This study's results indicate that the distribution of the PV power divided by the estimated value of the total insolation on a tilted surface is similar to a normal distribution and that a residential (privately-owned) system without storage, whose PV capacity is more than 2 kWp, has little effect upon the reduction of the energy of an average Japanese household.

Sutoh, T.; Suzuki, H.; Sekine, Y.

1987-03-01T23:59:59.000Z

280

Initial operating experience of the 12-MW La Ola photovoltaic system.  

SciTech Connect (OSTI)

The 1.2-MW La Ola photovoltaic (PV) power plant in Lanai, Hawaii, has been in operation since December 2009. The host system is a small island microgrid with peak load of 5 MW. Simulations conducted as part of the interconnection study concluded that unmitigated PV output ramps had the potential to negatively affect system frequency. Based on that study, the PV system was initially allowed to operate with output power limited to 50% of nameplate to reduce the potential for frequency instability due to PV variability. Based on the analysis of historical voltage, frequency, and power output data at 50% output level, the PV system has not significantly affected grid performance. However, it should be noted that the impact of PV variability on active and reactive power output of the nearby diesel generators was not evaluated. In summer 2011, an energy storage system was installed to counteract high ramp rates and allow the PV system to operate at rated output. The energy storage system was not fully operational at the time this report was written; therefore, analysis results do not address system performance with the battery system in place.

Ellis, Abraham; Lenox, Carl (SunPower Corporation, Richmond, CA); Johnson, Jay; Quiroz, Jimmy Edward; Schenkman, Benjamin L.

2011-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Advanced photovoltaic/hydro hybrid renewable energy system for remote areas  

Science Journals Connector (OSTI)

This paper presents modeling and simulation of the advanced photovoltaic (PV)/hydro based Hybrid Renewable Energy System (HRES) to electrify such isolated/remote areas where grid accessibility is not possible. For 7.5?kW hydro generation system a Self Excited Induction Generator (SEIG) with improved technique is used to optimize the utilization of hydro power. To achieve this aim an uncontrolled bridge rectifier coupled with Hydro side Voltage Source Inverter is implemented for the SEIG based advanced hydro system. The PV system is configured by PV array battery DC/DC converter maximum power point tracking controller and PV side Voltage Source Inverter. A Constant Current Control scheme is developed in this paper to control active and reactive power flow and to synchronize hydro and PV systems. The proposed system uses fewer controlled switches hence complexity of control has been reduced and system has higher efficiency and lower switching losses. The performance analysis of the HRES has been done to authenticate the existence of the system using the MATLAB software and results demonstrate that power quality of the proposed system is better and HRES is able to put into services.

2014-01-01T23:59:59.000Z

282

A dynamic model for air-based photovoltaic thermal systems working under real operating conditions  

Science Journals Connector (OSTI)

Abstract In this paper a dynamic model suitable for simulating real operating conditions of air-based photovoltaic thermal (PVT) systems is presented. The performance of the model is validated by using the operational data collected from the building integrated photovoltaic (PVT) systems installed in two unique buildings. The modelled air outlet temperature and electrical power match very well with the experimental data. In Solar Decathlon house PVT, the average (RMS) error in air outlet temperatures was 4.2%. The average (RMS) error in electrical power was also 4.2%. In the Sustainable Buildings Research Centre PVT, the average errors (RMS) of PV and air temperatures were 3.8% and 2.2%, respectively. The performance of the PVT system under changing working condition is also analysed in this paper. The analysis includes the effect of ambient air temperature, air inlet temperature, air flow rate and solar irradiation on thermal, electrical, first law and second law efficiencies. Both the thermal and the 1st law efficiencies almost linearly increased with the increase of the ambient temperature. However, the PVT electrical efficiency and the second law efficiency decreased with the increase of the ambient temperature. All efficiencies expect the second law efficiency decreased with increase of the PVT air inlet temperature. The second law efficiency first increased and then reduced. With increasing the air flow rate all the efficiencies increased. The electrical and second law efficiencies become less sensitive when the air flow rate exceeded 300 l/s. Both the thermal and the 1st law efficiencies decreased while the electrical efficiency and the second law efficiency increased with the increase of the solar irradiation. The efficiencies found to be very sensitive for low level of solar irradiations. At about 400 W m?2 irradiation efficiencies became less sensitive.

M. Imroz Sohel; Zhenjun Ma; Paul Cooper; Jamie Adams; Robert Scott

2014-01-01T23:59:59.000Z

283

PVWatts | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Calculator estimates the energy production and cost of energy of grid-connected photovoltaic (PV) energy systems throughout the world. It allows homeowners, small building...

284

An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

4476E 4476E An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California Ben Hoen, Ryan Wiser, Peter Cappers and Mark Thayer Environmental Energy Technologies Division April 2011 Download from http://eetd.lbl.gov/ea/emp/reports/lbnl-4476e.pdf This work was supported by the Office of Energy Efficiency and Renewable Energy (Solar Energy Technologies Program) of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, by the National Renewable Energy Laboratory under Contract No. DEK-8883050, and by the Clean Energy States Alliance. ERNEST ORLANDO LAWRENCE BERKELEY NATIONAL LABORATORY Disclaimer This document was prepared as an account of work sponsored by the United States Government.

285

Performance of a concentrated photovoltaic energy system with static linear Fresnel lenses  

Science Journals Connector (OSTI)

A new type of greenhouse with linear Fresnel lenses in the cover performing as a concentrated photovoltaic (CPV) system is presented. The CPV system retains all direct solar radiation, while diffuse solar radiation passes through and enters into the greenhouse cultivation system. The removal of all direct radiation will block up to 77% of the solar energy from entering the greenhouse in summer, reducing the required cooling capacity by about a factor 4. This drastically reduce the need for cooling in the summer and reduce the use of screens or lime coating to reflect or block radiation. All of the direct radiation is concentrated by a factor of 25 on a photovoltaic/thermal (PV/T) module and converted to electrical and thermal (hot water) energy. The PV/T module is kept in position by a tracking system based on two electric motors and steel cables. The energy consumption of the tracking system, ca. 0.51 W m?2, is less than 2% of the generated electric power yield. A peak power of 38 W m?2 electrical output was measured at 792 W m?2 incoming radiation and a peak power of 170 W m?2 thermal output was measured at 630 W m?2 incoming radiation of. Incoming direct radiation resulted in a thermal yield of 56% and an electric yield of 11%: a combined efficiency of 67%. The annual electrical energy production of the prototype system is estimated to be 29 kW h m?2 and the thermal yield at 518 MJ m?2. The collected thermal energy can be stored and used for winter heating. The generated electrical energy can be supplied to the grid, extra cooling with a pad and fan system and/or a desalination system. The obtained results show a promising system for the lighting and temperature control of a greenhouse system and building roofs, providing simultaneous electricity and heat. It is shown that the energy contribution is sufficient for the heating demand of well-isolated greenhouses located in north European countries.

P.J. Sonneveld; G.L.A.M. Swinkels; B.A.J. van Tuijl; H.J.J. Janssen; J. Campen; G.P.A. Bot

2011-01-01T23:59:59.000Z

286

An Analysis of the Effects of Photovoltaic Energy Systems on Residential Selling Prices in California.  

SciTech Connect (OSTI)

An increasing number of homes with existing photovoltaic (PV) energy systems have sold in the U.S., yet relatively little research exists that estimates the marginal impacts of those PV systems on the sales price. A clearer understanding of these effects might influence the decisions of homeowners, home buyers and PV home builders. This research analyzes a large dataset of California homes that sold from 2000 through mid-2009 with PV installed. Across a large number of hedonic and repeat sales model specifications and robustness tests, the analysis finds strong evidence that homes with PV systems sold for a premium over comparable homes without. The effects range, on average, from approximately $3.9 to $6.4 per installed watt (DC), with most models coalescing near $5.5/watt, which corresponds to a premium of approximately $17,000 for a 3,100 watt system. The research also shows that, as PV systems age, the premium enjoyed at the time of home sale decreases. Additionally, existing homes with PV systems are found to have commanded a larger sales price premium than new homes with similarly sized PV systems. Reasons for this discrepancy are suggested, yet further research is warranted in this area as well as a number of other areas that are highlighted.

Cappers, Peter; Wiser, Ryan; Thayer, Mark; Hoen, Ben

2011-04-12T23:59:59.000Z

287

Sandia National Laboratories: concentrating photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Energy Efficiency On March 29, 2013, in Concentrating Solar Power, Energy, Partnership, Photovoltaic, Renewable Energy, Research & Capabilities, Solar, Systems Engineering MODE...

288

Effect of Solar Panel Cooling on Photovoltaic Performance.  

E-Print Network [OSTI]

?? One of the main problems in using the photovoltaic system is the low energy conversion efficiency of photovoltaic cells and, furthermore, during the long… (more)

Ali, Rehan

2014-01-01T23:59:59.000Z

289

Energy 101: Solar Photovoltaics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

101: Solar Photovoltaics 101: Solar Photovoltaics Energy 101: Solar Photovoltaics February 10, 2011 - 5:29pm Addthis Learn more about photovoltaic systems that convert light energy into electricity. Andy Oare Andy Oare Former New Media Strategist, Office of Public Affairs What are the key facts? The literal translation of the word photovoltaic is light-electricity. Photovoltaic systems generate power without pollution - and recent advancements have greatly increased their efficiency. Enough energy from the sun hits the earth every hour to power the planet for an entire year-and solar photovoltaic (PV) systems are a clean, cost-effective way to harness that power for homes and businesses. The literal translation of the word photovoltaic is light-electricity-and this is exactly what photovoltaic materials and devices do-they convert

290

Economic Analysis of a Brackish Water Photovoltaic-Operated (BWRO-PV) Desalination System: Preprint  

SciTech Connect (OSTI)

The photovoltaic (PV)-powered reverse-osmosis (RO) desalination system is considered one of the most promising technologies in producing fresh water from both brackish and sea water, especially for small systems located in remote areas. We analyze the economic viability of a small PV-operated RO system with a capacity of 5 m3/day used to desalinate brackish water of 4000 ppm total dissolve solids, which is proposed to be installed in a remote area of the Babylon governorate in the middle of Iraq; this area possesses excellent insolation throughout the year. Our analysis predicts very good economic and environmental benefits of using this system. The lowest cost of fresh water achieved from using this system is US $3.98/ m3, which is very reasonable compared with the water cost reported by small-sized desalination plants installed in rural areas in other parts of the world. Our analysis shows that using this small system will prevent the release annually of 8,170 kg of CO2, 20.2 kg of CO, 2.23 kg of CH, 1.52 kg of particulate matter, 16.41 kg of SO2, and 180 kg of NOx.

Al-Karaghouli, A.; Kazmerski, L. L.

2010-10-01T23:59:59.000Z

291

Reliability and Geographic Trends of 50,000 Photovoltaic Systems in the USA: Preprint  

SciTech Connect (OSTI)

This paper presents performance and reliability data from nearly 50,000 photovoltaic (PV) systems totaling 1.7 gigawatts installed capacity in the USA from 2009 to 2012 and their geographic trends. About 90% of the normal systems and about 85% of all systems, including systems with known issues, performed to within 10% or better of expected performance. Although considerable uncertainty may exist due to the nature of the data, hotter climates appear to exhibit some degradation not seen in the more moderate climates. Special causes of underperformance and their impacts are delineated by reliability category. Hardware-related issues are dominated by inverter problems (totaling less than 0.5%) and underperforming modules (totaling less than 0.1%). Furthermore, many reliability categories show a significant decrease in occurrence from year 1 to subsequent years, emphasizing the need for higher-quality installations but also the need for improved standards development. The probability of PV system damage because of hail is below 0.05%. Singular weather events can have a significant impact such as a single lightning strike to a transformer or the impact of a hurricane. However, grid outages are more likely to have a significant impact than PV system damage when extreme weather events occur.

Jordan, D. C.; Kurtz, S. R.

2014-09-01T23:59:59.000Z

292

Life-cycle assessment of multi-crystalline photovoltaic (PV) systems in China  

Science Journals Connector (OSTI)

Abstract This study performs a life-cycle assessment for a photovoltaic (PV) system with multi-crystalline silicon (multi-Si) modules in China. It considers the primary energy demand, energy payback time (EPBT), and environmental impacts, such as global warming potential and eutrophication, over the entire life cycle of the PV system, including the upstream process, ranging from silica extraction to the multi-Si purification, the midstream process, involving crystalline silicon ingot growth and wafering; and the downstream process, consisting of cell and module fabrication. The data were collected with recommendations provided by the ISO norms and acquired from typical PV companies in China. The results show that the most critical phase of life cycle of Chinese PV system was the transformation of metallic silicon into solar silicon, which was characterized by high electricity consumption, representing most of the environmental impact. The other electricity generation systems were compared to PV. Considering that Chinese electricity is mainly produced by coal-fired power plants, the installation of multi-Si PV systems is recommended over exporting them from China. Furthermore, being higher solar radiation areas, areas in western China, such as the Tibet Autonomous Region, northeastern Qinghai, and the western borders of Gansu, are best suited for the installation of the PV systems even if the long distance of transportation. Finally, recommendations were provided with respect to the sustainable development of the Chinese PV industry and environmental protection.

Yinyin Fu; Xin Liu; Zengwei Yuan

2014-01-01T23:59:59.000Z

293

Sandia National Laboratories: Photovoltaic Specialists Conference  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Surety, Facilities, Grid Integration, Infrastructure Security, News, News & Events, Photovoltaic, Renewable Energy, Solar, Solar Newsletter, Systems Engineering Matthew Reno,...

294

NREL: Photovoltaics Research - Emerging Technologies Engineering...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and the potential benefit of increasing system efficiency. Printable Version Photovoltaics Research Home Silicon Polycrystalline Thin Films Multijunctions New Materials,...

295

Sandia National Laboratory Photovoltaic Design Resources | Open Energy  

Open Energy Info (EERE)

Sandia National Laboratory Photovoltaic Design Resources Sandia National Laboratory Photovoltaic Design Resources Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Photovoltaic Design Resources at Sandia National Laboratories Agency/Company /Organization: Sandia National Laboratories Sector: Energy Focus Area: Renewable Energy, Solar Topics: Pathways analysis Website: www.sandia.gov/ References: Sandia's Photovoltaic Research and Development Program [1] Sandia National Laboratories' Photovoltaic Research and Development program works with industry and academia to accelerate development and acceptance of technologies for photovoltaic energy systems. The program has published a series of handbooks and booklets that describe design guidelines for stand-alone photovoltaic system installations, photovoltaic water pumping systems, and evaluating photvoltaic applications

296

Photovoltaic Energy Technology Module | Open Energy Information  

Open Energy Info (EERE)

Photovoltaic Energy Technology Module Photovoltaic Energy Technology Module Jump to: navigation, search Tool Summary Name: Photovoltaic Energy Technology Module Agency/Company /Organization: World Bank Sector: Energy Focus Area: Renewable Energy, Solar Topics: Technology characterizations Website: web.worldbank.org/WBSITE/EXTERNAL/TOPICS/EXTENERGY2/EXTRENENERGYTK/0,, References: Photovoltaic Energy Technology Module[1] Resources Portable Solar Photovoltaic Lanterns: Performance and Certification Specification, and Type Approval, ESMAP TECHNICAL PAPER 078 Testing of Storage Batteries used in Stand Alone Photovoltaic Power Systems, Test procedures and examples of test results Technical Specifications for Solar Home Systems (SHS), Rural Electrification and Renewable Energy Development (PV Component) Project

297

Organic Photovoltaics  

Science Journals Connector (OSTI)

Satisfying the world's growing demand for energy is an urgent societal challenge. Organic photovoltaics holds promise as a cost-efficient and environmentally friendly solution.

Kippelen, Bernard

2007-01-01T23:59:59.000Z

298

Design, development and deployment of public service photovoltaic power/load systems for the Gabonese Republic. Final report  

SciTech Connect (OSTI)

Five different types of public service photovoltaic power/load systems installed in the Gabonese Republic are discussed. The village settings, the systems, performance results and some problems encountered are described. Most of the systems performed well, but some of the systems had problems due to failure of components or installation errors. The project was reasonably successful in collecting and reporting data for system performance evaluation that will be useful for guiding officials and system designers involved in village power applications in developing countries.

Kaszeta, W.J.

1987-04-01T23:59:59.000Z

299

A hybrid method combining JFPSO and probabilistic three-phase load flow for improving unbalanced voltages in distribution systems with photovoltaic generators  

Science Journals Connector (OSTI)

This paper presents a new hybrid method that combines jumping frog and particle swarm optimization and probabilistic three-phase load flow to improve unbalanced voltages in distribution systems with photovoltaic

F. J. Ruiz-Rodriguez; F. Jurado; M. Gomez-Gonzalez

2014-09-01T23:59:59.000Z

300

Sandia National Laboratory Photovoltaic Design Resources | Open Energy  

Open Energy Info (EERE)

Sandia National Laboratory Photovoltaic Design Resources Sandia National Laboratory Photovoltaic Design Resources (Redirected from Photovoltaic Design Resources at Sandia National Laboratories) Jump to: navigation, search Tool Summary Name: Photovoltaic Design Resources at Sandia National Laboratories Agency/Company /Organization: Sandia National Laboratories Sector: Energy Focus Area: Renewable Energy, Solar Topics: Pathways analysis Website: www.sandia.gov/ References: Sandia's Photovoltaic Research and Development Program [1] Sandia National Laboratories' Photovoltaic Research and Development program works with industry and academia to accelerate development and acceptance of technologies for photovoltaic energy systems. The program has published a series of handbooks and booklets that describe design guidelines for stand-alone photovoltaic system installations,

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Photovoltaics | Open Energy Information  

Open Energy Info (EERE)

(The following text is derived from NREL's description of photovoltaic (The following text is derived from NREL's description of photovoltaic technology.)[1] Photovoltaic Panels Solar cells, also called photovoltaic (PV) cells by scientists, convert sunlight directly into electricity. PV gets its name from the process of converting light (photons) to electricity (voltage), which is called the PV effect. The PV effect was discovered in 1954, when scientists at Bell Telephone discovered that silicon (an element found in sand) created an electric charge when exposed to sunlight. Soon solar cells were being used to power space satellites and smaller items like calculators and watches. Today, thousands of people power their homes and businesses with individual solar PV systems. Utility companies are also using PV technology for large

302

Photovoltaic and photoelectrochemical conversion of solar energy  

Science Journals Connector (OSTI)

...photoelectrochemical conversion of solar energy Michael Gratzel * * ( michael...industry, have dominated photovoltaic solar energy converters. These systems have...promising perspectives. renewable energy|solar energy conversion|photovoltaic...

2007-01-01T23:59:59.000Z

303

Network Analysis of Photovoltaic Energy Conversion  

Science Journals Connector (OSTI)

Photovoltaic energy conversion in photovoltaic cells has been analyzed by the detailed balance approach or by thermodynamic arguments. Here we introduce a network representation to analyze the performance of such systems once a suitable kinetic model (...

Mario Einax; Abraham Nitzan

2014-11-03T23:59:59.000Z

304

High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems; Volume 6 Building America Best Practices Series  

Broader source: Energy.gov (indexed) [DOE]

by by Pacific Northwest National Laboratory & Oak Ridge National Laboratory June 4, 2007 June 2007 * NREL/TP-550-41085 PNNL-16362 High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems Building America Best Practices Series Volume 6 High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems Building America Best Practices Series Prepared by Pacific Northwest National Laboratory, a DOE national laboratory Michael C. Baechler Theresa Gilbride, Kathi Ruiz, Heidi Steward and Oak Ridge National Laboratory, a DOE national laboratory Pat M. Love June 4, 2007 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor Battelle Memorial Institute, nor any of their employees, makes any warranty,

305

Electricity Bill Savings from Residential Photovoltaic Systems: Sensitivities to Changes in Future Electricity Market Conditions  

E-Print Network [OSTI]

in wholesale energy markets. Progress in Photovoltaics:designs (e.g. , an energy market with a price cap, combinedmarket designs feature an energy market with a lower price

Darghouth, Naim

2014-01-01T23:59:59.000Z

306

Simulation of a green wafer fab featuring solar photovoltaic technology and storage system  

Science Journals Connector (OSTI)

A semiconductor wafer fab requires a significant amount of energy to maintain its daily operations. Solar photovoltaics (PV) is a clean and renewable technology that can be potentially used to power large wafer fabs. There exist some critical factors ...

Leann Sanders; Stephanie Lopez; Greg Guzman; Jesus Jimenez; Tongdan Jin

2012-12-01T23:59:59.000Z

307

Numerical simulation of wind effects on a stand-alone ground mounted photovoltaic (PV) system  

Science Journals Connector (OSTI)

Abstract 3D Reynolds-Averaged Navier-Stokes (RANS) simulations using an unsteady solver with steady inlet conditions are carried out to investigate the wind load and flow field around a ground mounted stand-alone photovoltaic (PV) system with 25° panel tilt angle immersed in the atmospheric boundary layer (ABL) using the shear stress transport (SST) k-? turbulence closure. Wind directions of the incoming flow are varied from 0° to 180° at 45° intervals. Mean pressure coefficients on the surfaces of the PV panel are compared with the wind tunnel measurement by Abiola-Ogedengbe (2013) and an agreement within 46% is found. Coefficients of drag, lift and overturning moment for the PV system are computed from the numerical simulations. In terms of maximum uplift, 180° is found to be the critical wind direction whereas in terms of overturning moments, 45° and 135° are the critical wind directions. The wind velocity and vorticity fields around the panel are correlated and analyzed with respect to the pressure distribution on the panel surfaces.

Chowdhury Mohammad Jubayer; Horia Hangan

2014-01-01T23:59:59.000Z

308

Real Power and Reactive Power Control of a Three-Phase Single-Stage-PV System and PV voltage Stability  

SciTech Connect (OSTI)

Grid-connected photovoltaic (PV) systems with power electronic interfaces can provide both real and reactive power to meet power system needs with appropriate control algorithms. This paper presents the control algorithm design for a three-phase single-stage grid-connected PV inverter to achieve either maximum power point tracking (MPPT) or a certain amount of real power injection, as well as the voltage/var control. The switching between MPPT control mode and a certain amount of real power control mode is automatic and seamless. Without the DC-to-DC booster stage, PV DC voltage stability is an important issue in the control design especially when the PV inverter is operating at maximum power point (MPP) with voltage/var control. The PV DC voltage collapse phenomenon and its reason are discussed. The method based on dynamic correction of the PV inverter output is proposed to ensure PV DC voltage stability. Simulation results of the single-stage PV system during system disturbances and fast solar irradiation changes confirm that the proposed control algorithm for single-stage PV inverters can provide appropriate real and reactive power services and ensure PV DC voltage stability during dynamic system operation and atmospheric conditions.

Li, Huijuan [ORNL] [ORNL; Xu, Yan [ORNL] [ORNL; Adhikari, Sarina [ORNL] [ORNL; Rizy, D Tom [ORNL] [ORNL; Li, Fangxing [ORNL] [ORNL; Irminger, Philip [ORNL] [ORNL

2012-01-01T23:59:59.000Z

309

Photovoltaic cell  

DOE Patents [OSTI]

In a photovoltaic cell structure containing a visibly transparent, electrically conductive first layer of metal oxide, and a light-absorbing semiconductive photovoltaic second layer, the improvement comprising a thin layer of transition metal nitride, carbide or boride interposed between said first and second layers.

Gordon, Roy G. (Cambridge, MA); Kurtz, Sarah (Somerville, MA)

1984-11-27T23:59:59.000Z

310

An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California  

SciTech Connect (OSTI)

An increasing number of homes in the U.S. have sold with photovoltaic (PV) energy systems installed at the time of sale, yet relatively little research exists that estimates the marginal impacts of those PV systems on home sale prices. A clearer understanding of these possible impacts might influence the decisions of homeowners considering the installation of a PV system, homebuyers considering the purchase of a home with PV already installed, and new home builders considering including PV as an optional or standard product on their homes. This research analyzes a large dataset of California homes that sold from 2000 through mid-2009 with PV installed. It finds strong evidence that homes with PV systems sold for a premium over comparable homes without PV systems during this time frame. Estimates for this premium expressed in dollars per watt of installed PV range, on average, from roughly $4 to $5.5/watt across a large number of hedonic and repeat sales model specifications and robustness tests. When expressed as a ratio of the sales price premium of PV to estimated annual energy cost savings associated with PV, an average ratio of 14:1 to 19:1 can be calculated; these results are consistent with those of the more-extensive existing literature on the impact of energy efficiency on sales prices. When the data are split among new and existing homes, however, PV system premiums are markedly affected. New homes with PV show premiums of $2.3-2.6/watt, while existing homes with PV show premiums of more than $6/watt. Reasons for this discrepancy are suggested, yet further research is warranted. A number of other areas where future research would be useful are also highlighted.

Hoen, Ben; Cappers, Peter; Wiser, Ryan; Thayer, Mark

2011-04-19T23:59:59.000Z

311

Modelling of a stand alone photovoltaic system with dedicated hybrid battery energy storage system by Nicholas Vanden Eynde.  

E-Print Network [OSTI]

??Includes abstract. The purpose of this thesis project was to model and simulate a stand-alone photovoltaic (PV) plant that utilized the maximum power point tracking… (more)

Vanden Eynde, Nicholas.

2012-01-01T23:59:59.000Z

312

Life Cycle Assessment of solar energy systems: Comparison of photovoltaic and water thermal heater at domestic scale  

Science Journals Connector (OSTI)

Abstract This study is concerned with the results of a Life Cycle Assessment comparison between photovoltaic – silicon based modules and thin film modules – and solar thermal systems, as technologies which are usually installed for partially covering household energy demand. Several studies focused on energy and environmental performances of photovoltaic and solar thermal collectors, however they have been always analysed separately. This study proposes the comparison of different systems to exploit the solar energy, producing different energy types. The comparison was done referring to one square meter of roof surface occupied by the equipment. The environmental burdens were calculated according to the indicators proposed by Eco-indicator'95 method. The results showed that the system based on thermal solar collector obtained the major number of more favourable indicators: eight out of ten, in the case of no-recycling of materials after dismantling phase, and six out of ten in the case of recycling of materials after dismantling phase. The thin film modules and solar thermal collector showed the lowest values of energy payback time and \\{CO2eq\\} payback time. Results clearly show that photovoltaic and solar thermal collector can effectively provide comparable environmental and energy benefits as regard to domestic scale installation.

E. Carnevale; L. Lombardi; L. Zanchi

2014-01-01T23:59:59.000Z

313

Technical and economical system comparison of photovoltaic and concentrating solar thermal power systems depending on annual global irradiation  

Science Journals Connector (OSTI)

Concentrating solar thermal power and photovoltaics are two major technologies for converting sunlight to electricity. Variations of the annual solar irradiation depending on the site influence their annual efficiency, specific output and electricity generation cost. Detailed technical and economical analyses performed with computer simulations point out differences of solar thermal parabolic trough power plants, non-tracked and two-axis-tracked PV systems. Therefore, 61 sites in Europe and North Africa covering a global annual irradiation range from 923 to 2438 kW h/m2 a have been examined. Simulation results are usable irradiation by the systems, specific annual system output and levelled electricity cost. Cost assumptions are made for today's cost and expected cost in 10 years considering different progress ratios. This will lead to a cost reduction by 50% for PV systems and by 40% for solar thermal power plants. The simulation results show where are optimal regions for installing solar thermal trough and tracked PV systems in comparison to non-tracked PV. For low irradiation values the annual output of solar thermal systems is much lower than of PV systems. On the other hand, for high irradiations solar thermal systems provide the best-cost solution even when considering higher cost reduction factors for PV in the next decade. Electricity generation cost much below 10 Eurocents per kW h for solar thermal systems and about 12 Eurocents/kW h for PV can be expected in 10 years in North Africa.

Volker Quaschning

2004-01-01T23:59:59.000Z

314

Energy modeling of photovoltaic thermal systems with corrugated unglazed transpired solar collectors – Part 2: Performance analysis  

Science Journals Connector (OSTI)

Abstract This paper is the second of two companion papers focused on energy modeling and performance analysis of building-integrated photovoltaic thermal (PV/T) systems with corrugated unglazed transpired solar collectors (UTCs). In Part 1, energy models are presented for two configurations: UTC only and UTC with PV panels. The models predict the energy output of the system for different weather and system design conditions and are validated using measured data from an outdoor test facility. In this paper (Part 2), the system performance is evaluated based on data drawn from the literature and simulations with Computational Fluid Dynamics (CFD) and energy models. The analysis includes parameters that are unique for this system, such as the corrugation geometry and the collector orientation. Validated, high resolution CFD simulations are used to study the impact of plate orientation and incident turbulence intensity, based on the comparison of exterior and interior Nusselt (Nu) number and the cavity exit air temperature, as well as the PV surface temperature when \\{UTCs\\} are integrated with PV panels. It is found that for configurations with UTC only, both exterior and interior convective heat transfer is enhanced in the ‘vertical’ installation, while similar results were obtained for increased incident turbulence intensity levels. However, only minor influences from these two parameters are observed for \\{UTCs\\} with PV panels. The energy model is used to investigate the optimal geometry for both configurations. It is found that parameters such as slope length and corrugation wavelength have the most significant impact on UTC performance while the wavelength and PV panel height have the largest effect for \\{UTCs\\} with PV panels.

Siwei Li; Panagiota Karava

2014-01-01T23:59:59.000Z

315

The feed-in tariff in the UK: A case study focus on domestic photovoltaic systems  

Science Journals Connector (OSTI)

This paper explores the photovoltaic (PV) industry in the United Kingdom (UK) as experienced by those who are working with it directly and with consideration of current standards, module efficiencies and future environmental trends. The government's consultation on the comprehensive review for solar PV tariffs, proposes a reduction of the generation tariff for PV installations in the UK of more than 50%. The introduction of the Feed-In Tariffs scheme (FITs) has rapidly increased deployment of PV technologies at small scale since its introduction in April 2010. The central principle of FIT policies is to offer guaranteed prices for fixed periods to enable greater number of investors. A financial analysis was performed on two real-life installations in Cornwall, UK to determine the impact of proposed cuts to the FIT will make to a typical domestic PV system under 4 kW. The results show that a healthy Return on Investment (ROI) can still be made but that future installations should focus on off-setting electricity required from the national grid as a long term push for true sustainability rather than subsidised schemes. The profitability of future installations will have to be featured within in-service and end-of-service considerations such as the feed-in tariff, module efficiencies and the implications of costs associated with end-of-life disposal.

R. Cherrington; V. Goodship; A. Longfield; K. Kirwan

2013-01-01T23:59:59.000Z

316

Simulation of one-minute power output from utility-scale photovoltaic generation systems.  

SciTech Connect (OSTI)

We present an approach to simulate time-synchronized, one-minute power output from large photovoltaic (PV) generation plants in locations where only hourly irradiance estimates are available from satellite sources. The approach uses one-minute irradiance measurements from ground sensors in a climatically and geographically similar area. Irradiance is translated to power using the Sandia Array Performance Model. Power output is generated for 2007 in southern Nevada are being used for a Solar PV Grid Integration Study to estimate the integration costs associated with various utility-scale PV generation levels. Plant designs considered include both fixed-tilt thin-film, and single-axis-tracked polycrystalline Si systems ranging in size from 5 to 300 MW{sub AC}. Simulated power output profiles at one-minute intervals were generated for five scenarios defined by total PV capacity (149.5 MW, 222 WM, 292 MW, 492 MW, and 892 MW) each comprising as many as 10 geographically separated PV plants.

Stein, Joshua S.; Ellis, Abraham; Hansen, Clifford W.

2011-08-01T23:59:59.000Z

317

Photovoltaic roof heat flux  

E-Print Network [OSTI]

Effect of building integrated photovoltaics on microclimateof a building's integrated-photovoltaics on heating a n dgaps for building- integrated photovoltaics, Solar Energy

Samady, Mezhgan Frishta

2011-01-01T23:59:59.000Z

318

A Generalized Class of Stationary Frame-Current Controllers for Grid-Connected AC–DC Converters  

E-Print Network [OSTI]

Within power systems, high-power pulsewidth-modulated ac-dc converters are used in flexible ac transmission systems controllers and for interfacing renewable energy sources to the grid. These converters traditionally ...

Hwang, J. George

319

SunShot Initiative: Thin Film Photovoltaics Research  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Thin Film Photovoltaics Research Thin Film Photovoltaics Research to someone by E-mail Share SunShot Initiative: Thin Film Photovoltaics Research on Facebook Tweet about SunShot Initiative: Thin Film Photovoltaics Research on Twitter Bookmark SunShot Initiative: Thin Film Photovoltaics Research on Google Bookmark SunShot Initiative: Thin Film Photovoltaics Research on Delicious Rank SunShot Initiative: Thin Film Photovoltaics Research on Digg Find More places to share SunShot Initiative: Thin Film Photovoltaics Research on AddThis.com... Concentrating Solar Power Photovoltaics Research & Development Crystalline Silicon Thin Films Multijunctions Organic Photovoltaics Dye-Sensitized Solar Cells Competitive Awards Systems Integration Balance of Systems Thin Film Photovoltaics Research The U.S. Department of Energy (DOE) supports research and development of

320

EELE408 Photovoltaics Lecture 01: Intro & Safety  

E-Print Network [OSTI]

1 EELE408 Photovoltaics Lecture 01: Intro & Safety Dr. Todd J. Kaiser tjkaiser@ece.montana.edu Department of Electrical and Computer Engineering Montana State University - Bozeman EELE408 Photovoltaics & Ventre: Photovoltaic Systems Engineering , 3E · Resources: ­ Green: Solar Cells: Operating Principles

Kaiser, Todd J.

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Consumer's Guide: Get Your Power from the Sun  

DOE R&D Accomplishments [OSTI]

Photovoltaics; PV; Grid-Connected; Net Metering; Solar Electricity; Consumer Guides; Solar Energy - Photovoltaics

Starrs, T.; Wenger, H.

2003-12-00T23:59:59.000Z

322

Exergoeconomic analysis of high concentration photovoltaic thermal co-generation system for space cooling  

Science Journals Connector (OSTI)

Abstract This paper provides an exergetic analysis of a 10 MW high concentration photovoltaic thermal (HCPVT) power plant case study located in Hammam Bou Hadjar, Algeria. The novel HCPVT multi-energy carrier plant converts 25% of the direct normal irradiance (DNI) into electrical energy and 62.5% to low grade heat for a combined efficiency of 87.5%. The HCPVT system employs a point focus dish concentrator with a cooled PV receiver module. The novel “hot-water” cooling approach is used for energy reuse purposes and is enabled by our state-of-the-art substrate integrated micro-cooling technology. The high performance cooler of the receiver with a thermal resistance of <0.12 cm2 K/W enables the receiver module to handle concentrations of up to 5000 suns. In the present study, a concentration of 2000 suns allows using coolant fluid temperatures of up to 80 °C. This key innovation ensures reliable operation of the triple junction PV (3JPV) cells used and also allows heat recovery for utilization in other thermal applications such as space cooling, heating, and desalination. Within this context, an exergoeconomics analysis of photovoltaic thermal co-generation for space cooling is presented in this manuscript. The valuation method presented here for the HCPVT multi-energy carrier plant comprises both the technical and economic perspectives. The proposed model determines how the cost structure is evolving in four different scenarios by quantifying the potential thermal energy demand in Hammam Bou Hadjar. The model pins down the influence of technical details such as the exergetic efficiency to the economic value of the otherwise wasted heat. The thermal energy reuse boosts the power station?s overall yield, reduces total average costs and optimizes power supply as fixed capital is deployed more efficiently. It is observed that even though potential cooling demand can be substantial (19,490 MWh per household), prices for cooling should be 3 times lower than those of electricity in Algeria (18 USD/MWh) to be competitive. This implies a need to reach economies of scale in the production of individual key components of the HCPVT system. The net present value (NPV) is calculated taking growth rates and the system?s modular efficiencies into account, discounted over 25 years. Scenario 1 shows that even though Algeria currently has no market for thermal energy, a break-even quantity (49,728 MWh) can be deduced by taking into account the relation between fixed costs and the marginal profit. Scenario 2 focuses on the national growth rate needed to break even, i.e. +10.92%. Scenario 3 illustrates thermal price variations given an increase in the Coefficient of Performance (COP) of a thermally driven adsorption chiller after year 10. In this case, the price for cooling will decrease from 18 USD/MWh to 14 USD/MWh. Finally, scenario 4 depicts Hammam Bou Hadjar?s potential cooling demand per household and the growth rate needed to break even if a market for heat would exist.

Veronica Garcia-Heller; Stephan Paredes; Chin Lee Ong; Patrick Ruch; Bruno Michel

2014-01-01T23:59:59.000Z

323

Study of Stability Analysis of a Grid-Connected Doubly Fed Induction Generator (DFIG)-based small Wind Farm.  

E-Print Network [OSTI]

??Wind is the most reliable, clean and fast-developing renewable energy source. The DFIG-based variable speed wind turbine system is now the most popular in wind… (more)

Dhar, Baishakhi

2013-01-01T23:59:59.000Z

324

Sandia National Laboratories: Photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Microelectronic Photovoltaics On June 13, 2012, in Energy, News, News & Events, Photovoltaic, Renewable Energy, Solar Sandia National Laboratories semiconductor engineer...

325

Sandia National Laboratories: photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Infrastructure Infrastructure Security National Solar Thermal Test Facility NSTTF photovoltaic Photovoltaics PV Renewable Energy solar Solar Energy solar power Solar...

326

Chapter 2 - Photovoltaic  

Science Journals Connector (OSTI)

Abstract This chapter discusses solar radiation characteristics: solar constant, direct and diffuse sunlight, air mass, irradiance, insolation, peak sun hours, and the solar window. Moreover, it considers photovoltaic (PV) conversion, the photovoltaic cell, and the performance evaluation of PV cells, module, panels and arrays that include: current?voltage (I–V) characteristics, power–voltage (P–V) characteristics. The chapter also studies the effect of irradiance on a PV cell voltage and current, the equivalent circuit of a solar cell, and the connection of the PV devices (parallel and series). The chapter explores ways of optimization PV arrays: maximum power point trackers, sun trackers, batteries' use, and proper matching with loads and solar concentration. It talks about photovoltaic systems: stand-alone and interactive, PV sizing of a stand-alone PV systems, PV applications, and utility interconnection issues and requirements.

Ziyad Salameh

2014-01-01T23:59:59.000Z

327

Benchmarking Non-Hardware Balance of System (Soft) Costs for U.S. Photovoltaic Systems Using a Data-Driven Analysis from PV Installer Survey Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Non-Hardware Non-Hardware Balance of System (Soft) Costs for U.S. Photovoltaic Systems Using a Data-Driven Analysis from PV Installer Survey Results November 2012 Benchmarking Non-Hardware Balance of System (Soft) Costs for U.S. Photovoltaic Systems Using a Data-Driven Analysis from PV Installer Survey Results NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Contract No. DE-AC36-08GO28308 LBNL's work was supported by the U.S. Department of Energy SunShot program under Contract No. DE-AC02-05CH11231 Technical Report DOE/GO-10212-3834 * November 2012 National Renewable Energy Laboratory 15013 Denver West Parkway

328

A novel off-grid hybrid power system comprised of solar photovoltaic, wind, and hydro energy sources  

Science Journals Connector (OSTI)

Abstract Several factors must be considered before adopting a full-phase power generation system based on renewable energy sources. Long-term necessary data (for one year if possible) should be collected before making any decisions concerning implementation of such a systems. To accurately assess the potential of available resources, we measured solar irradiation, wind speed, and ambient temperature at two high-altitude locations in Nepal: the Lama Hotel in Rasuwa District and Thingan in Makawanpur District. Here, we propose two practical, economical hybridization methods for small off-grid systems consisting entirely of renewable energy sources—specifically solar photovoltaic (PV), wind, and micro-hydro sources. One of the methods was tested experimentally, and the results can be applied to help achieve Millennium Development Goal 7: Ensuring environmental sustainability. Hydro, wind, and solar photovoltaic energy are the top renewable energy sources in terms of globally installed capacity. However, no reports have been published about off-grid hybrid systems comprised of all three sources, making this implementation the first of its kind anywhere. This research may be applied as a practical guide for implementing similar systems in various locations. Of the four off-grid PV systems installed by the authors for village electrification in Nepal, one was further hybridized with wind and hydro power sources. This paper presents a novel approach for connecting renewable energy sources to a utility mini-grid.

Binayak Bhandari; Kyung-Tae Lee; Caroline Sunyong Lee; Chul-Ki Song; Ramesh K. Maskey; Sung-Hoon Ahn

2014-01-01T23:59:59.000Z

329

EPJ Photovoltaics 2, 20301 (2011) www.epj-pv.org  

E-Print Network [OSTI]

EPJ Photovoltaics 2, 20301 (2011) www.epj-pv.org DOI: 10.1051/epjpv/2011001 c Owned by the authors, published by EDP Sciences, 2011 EPJ PhotovoltaicsEPJ Photovoltaics Geometrical optimization and electrical online: 1 April 2011 Abstract This article investigates the optimal efficiency of a photovoltaic system

Paris-Sud XI, Université de

330

The Impact of City-level Permitting Processes on Residential Photovoltaic Installation Prices and Development Times: An Empirical Analysis of Solar Systems in California Cities  

E-Print Network [OSTI]

V: The Installed Price of Photovoltaics in the United Statescost of energy for photovoltaics. ” Energy & EnvironmentalInc. case study. ” Progress in Photovoltaics 19 (4): 498–500

Wiser, Ryan

2014-01-01T23:59:59.000Z

331

Performance of a Dynamically Controlled Inverter in a Photovoltaic System Interconnected with a Secondary Network Distribution System  

SciTech Connect (OSTI)

In 2008, a 300 kW{sub peak} photovoltaic (PV) system was installed on the rooftop of the Colorado Convention Center (CCC). The installation was unique for the electric utility, Xcel Energy, as it had not previously permitted a PV system to be interconnected on a building served by the local secondary network distribution system (network). The PV system was installed with several provisions; one to prevent reverse power flow, another called a dynamically controlled inverter (DCI), that curtails the output of the PV inverters to maintain an amount of load supplied by Xcel Energy at the CCC. The DCI system utilizes current transformers (CTs) to sense power flow to insure that a minimum threshold is maintained from Xcel Energy through the network transformers. The inverters are set to track the load on each of the three phases and curtail power from the PV system when the generated PV system current reaches 95% of the current on any phase. This is achieved by the DCI, which gathers inputs from current transformers measuring the current from the PV array, Xcel, and the spot network load. Preventing reverse power flow is a critical technical requirement for the spot network which serve this part of the CCC. The PV system was designed with the expectation that the DCI system would not curtail the PV system, as the expected minimum load consumption was historically higher than the designed PV system size. However, the DCI system has operated many days during the course of a year, and the performance has been excellent. The DCI system at the CCC was installed as a secondary measure to insure that a minimum level of power flows to the CCC from the Xcel Energy network. While this DCI system was intended for localized control, the system could also reduce output percent if an external smart grid control signal was employed. This paper specifically focuses on the performance of the innovative design at this installation; however, the DCI system could also be used for new s- art grid-enabled distribution systems where renewables power contributions at certain conditions or times may need to be curtailed.

Coddington, M. H.; Kroposki, B. D.; Basso, T.; Berger, D.; Crowell, K.; Hayes, J.

2011-01-01T23:59:59.000Z

332

Photovoltaic Resources and Technologies | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Photovoltaic Resources and Technologies Photovoltaic Resources and Technologies Photovoltaic Resources and Technologies October 7, 2013 - 9:22am Addthis Graphic of the eTraining logo Training Available Selecting, Implementing, and Funding Photovoltaic Systems in Federal Facilities: Learn how to select, implement, and fund a photovoltaic system by taking this FEMP eTraining course. This page provides a brief overview of photovoltaic (PV) technologies supplemented by specific information to apply PV within the Federal sector. Overview Photovoltaic cells convert sunlight into electricity. Systems typically include a PV module or array made of individual PV cells installed on or near a building or other structure. A power inverter converts the direct current (DC) electricity produced by the PV cells to alternative current

333

Coordinated controller design of grid connected DFIG based wind turbine using response surface methodology and NSGA II  

Science Journals Connector (OSTI)

Abstract This paper presents a novel design procedure for the coordinated tuning of rotor side converter (RSC) and grid side converter (GSC) controllers of doubly fed induction generator (DFIG) wind turbine system. The RSC and GSC controller parameters are determined by simultaneously optimizing the controller performance indices. The performance indices considered are maximum peak overshoot (MPOS?), settling time (Tss?) of the generator speed and the maximum peak overshoot (MPOSVdc), maximum peak undershoot (MPUSVdc) and settling time (TssVdc) of DC link voltage. The coordinated controller design is carried out in two steps. First step is to arrive at the analytical expression that relates the performance indices and the controller parameters. This is achieved using response surface methodology (RSM) thereby saving significant computational time. In the second step the determination of controller parameters is posed as a constrained multiobjective optimization problem. The constrained multiobjective optimization problem is solved using NSGAII (nondominated sorting genetic algorithm II). The proposed methodology is tested on a sample system with DFIG based WECS. Simulation results demonstrate the effectiveness of the proposed methodology.

Sharon Ravichandran; R.P. Kumudinidevi; S.G. Bharathidasan; V. Evangelin Jeba

2014-01-01T23:59:59.000Z

334

Photovoltaic Materials  

SciTech Connect (OSTI)

The goal of the current project was to help make the US solar industry a world leader in the manufacture of thin film photovoltaics. The overall approach was to leverage ORNL’s unique characterization and processing technologies to gain a better understanding of the fundamental challenges for solar cell processing and apply that knowledge to targeted projects with industry members. ORNL has the capabilities in place and the expertise required to understand how basic material properties including defects, impurities, and grain boundaries affect the solar cell performance. ORNL also has unique processing capabilities to optimize the manufacturing process for fabrication of high efficiency and low cost solar cells. ORNL recently established the Center for Advanced Thin-film Systems (CATS), which contains a suite of optical and electrical characterization equipment specifically focused on solar cell research. Under this project, ORNL made these facilities available to industrial partners who were interested in pursuing collaborative research toward the improvement of their product or manufacturing process. Four specific projects were pursued with industrial partners: Global Solar Energy is a solar industry leader in full scale production manufacturing highly-efficient Copper Indium Gallium diSelenide (CIGS) thin film solar material, cells and products. ORNL worked with GSE to develop a scalable, non-vacuum, solution technique to deposit amorphous or nanocrystalline conducting barrier layers on untextured stainless steel substrates for fabricating high efficiency flexible CIGS PV. Ferro Corporation’s Electronic, Color and Glass Materials (“ECGM”) business unit is currently the world’s largest supplier of metallic contact materials in the crystalline solar cell marketplace. Ferro’s ECGM business unit has been the world's leading supplier of thick film metal pastes to the crystalline silicon PV industry for more than 30 years, and has had operational cells and modules in the field for 25 years. Under this project, Ferro leveraged world leading analytical capabilities at ORNL to characterize the paste-to-silicon interface microstructure and develop high efficiency next generation contact pastes. Ampulse Corporation is developing a revolutionary crystalline-silicon (c-Si) thin-film solar photovoltaic (PV) technology. Utilizing uniquely-textured substrates and buffer materials from the Oak Ridge National Laboratory (ORNL), and breakthroughs in Hot-Wire Chemical Vapor Deposition (HW-CVD) techniques in epitaxial silicon developed at the National Renewable Energy Laboratory (NREL), Ampulse is creating a solar technology that is tunable in silicon thickness, and hence in efficiency and economics, to meet the specific requirements of multiple solar PV applications. This project focused on the development of a high rate deposition process to deposit Si, Ge, and Si1-xGex films as an alternate to hot-wire CVD. Mossey Creek Solar is a start-up company with great expertise in the solar field. The primary interest is to create and preserve jobs in the solar sector by developing high-yield, low-cost, high-efficiency solar cells using MSC-patented and -proprietary technologies. The specific goal of this project was to produce large grain formation in thin, net-shape-thickness mc-Si wafers processed with high-purity silicon powder and ORNL's plasma arc lamp melting without introducing impurities that compromise absorption coefficient and carrier lifetime. As part of this project, ORNL also added specific pieces of equipment to enhance our ability to provide unique insight for the solar industry. These capabilities include a moisture barrier measurement system, a combined physical vapor deposition and sputtering system dedicated to cadmium-containing deposits, adeep level transient spectroscopy system useful for identifying defects, an integrating sphere photoluminescence system, and a high-speed ink jet printing system. These tools were combined with others to study the effect of defects on the performance of crystalline silicon and

Duty, C.; Angelini, J.; Armstrong, B.; Bennett, C.; Evans, B.; Jellison, G. E.; Joshi, P.; List, F.; Paranthaman, P.; Parish, C.; Wereszczak, A.

2012-10-15T23:59:59.000Z

335

Techno-economic analysis of hybrid photovoltaic/diesel/battery off-grid system in northern Nigeria  

Science Journals Connector (OSTI)

The rate of dependence on stand-alone diesel generator for individual electricity generation among households in Nigeria is geometrically increasing and has thus led to significant increase of the environment pollution. This is due to the inability of the utility company to meet the energy demand of its yearning consumers due to ageing and limitations in power infrastructures. This has led to about 40% of the country's population been cut off from the national grid. In view of these hazardous effects posed from the usage of these individual diesel-powered generations this paper reports on the assessment of techno-economic viability of a hybrid photovoltaic diesel/battery off-grid system as an alternative solution to these threats. For that purpose a remote area located far in the northern part of Nigeria was taken as the case study in which an international institution with peak demand of 90?kW was considered. The HOMER optimization software is used to evaluate both the technical and economic viability of the proposed energy system by taking into account the variations of both the solar radiation and diesel prices as experienced in most part of Nigeria. The study reveals the potential capability of the hybrid photovoltaic/diesel energy system with battery backup as a good alternative energy source for individual household replacement for diesel-powered generator. In addition the proposed system is of high energy potential as well as low carbon emission at affordable cost of electricity.

Hafeez Olasunkanmi Tijani; Chee Wei Tan

2014-01-01T23:59:59.000Z

336

Concentrating photovoltaic solar panel  

DOE Patents [OSTI]

The present invention relates to photovoltaic power systems, photovoltaic concentrator modules, and related methods. In particular, the present invention features concentrator modules having interior points of attachment for an articulating mechanism and/or an articulating mechanism that has a unique arrangement of chassis members so as to isolate bending, etc. from being transferred among the chassis members. The present invention also features adjustable solar panel mounting features and/or mounting features with two or more degrees of freedom. The present invention also features a mechanical fastener for secondary optics in a concentrator module.

Cashion, Steven A; Bowser, Michael R; Farrelly, Mark B; Hines, Braden E; Holmes, Howard C; Johnson, Jr., Richard L; Russell, Richard J; Turk, Michael F

2014-04-15T23:59:59.000Z

337

NREL: Photovoltaics Research - Accomplishments in Photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Accomplishments in Photovoltaic Manufacturing R&D Accomplishments in Photovoltaic Manufacturing R&D Successful efforts within the PV Manufacturing R&D Project were recognized by the solar industry. Key highlights from the project are summarized below. Overall, the project resulted in a more than 50% reduction in manufacturing costs and a substantial return on investment for both the U.S. government and the industries involved. A number of companies participating in the project were able to make technological advances that helped them attract millions of dollars in private investment capital. The project focused on four primary areas of solar manufacturing: Solar cells and modules Manufacturing processes Systems integration System components. Solar Cells and Modules Advances in solar cells and modules were made that significantly reduced

338

Photovoltaic low power systems and their environmental impact:Yuma, Arizona, U.S.A. case study and projections for Mexicali, Mexico  

Science Journals Connector (OSTI)

Abstract This article presents a proposal for the implementation of photovoltaic systems in homes located in Mexicali, Mexico. With exhibition of new insulation and different consumption characteristics. The photovoltaic low power system is proposed as a type of electrical supply that helps in reducing the environmental impact of generating energy by burning fossil fuels. A photovoltaic system installed in the city of Yuma, Arizona in the United States, which supplies the electrical needs to a building is selected as a reference for solar resource use. Energy use improvement and consumption costs are calculated, and the equivalent amounts of greenhouse gases, not generated since solar technologies were implemented are determined. Furthermore, comparisons of the solar potential between Yuma and Mexicali show that the Mexican city has a higher annual solar potential, so the applicability of this solar technology is too feasible in Mexicali.

Néstor Santillán Soto; O. Rafael García Cueto; Sara Ojeda Benítez; Alejandro Adolfo Lambert Arista

2014-01-01T23:59:59.000Z

339

Advancing the Deployment of Utility-Scale Photovoltaic Plants in the Northeast  

SciTech Connect (OSTI)

As one of the premier research laboratories operated by the Department of Energy, Brookhaven National Laboratory (BNL) is pursuing an energy research agenda that focuses on renewable energy systems and will help to secure the nation's energy security. A key element of the BNL research is the advancement of grid-connected utility-scale solar photovoltaic (PV) plants, particularly in the northeastern part of the country where BNL is located. While a great deal of information has been generated regarding solar PV systems located in mostly sunny, hot, arid climates of the southwest US, very little data is available to characterize the performance of these systems in the cool, humid, frequently overcast climates experienced in the northeastern portion of the country. Recognizing that there is both a need and a market for solar PV generation in the northeast, BNL is pursuing research that will advance the deployment of this important renewable energy resource. BNL's research will leverage access to unique time-resolved data sets from the 37MWp solar array recently developed on its campus. In addition, BNL is developing a separate 1MWp solar research array on its campus that will allow field testing of new PV system technologies, including solar modules and balance of plant equipment, such as inverters, energy storage devices, and control platforms. These research capabilities will form the cornerstone of the new Northeast Solar Energy Research Center (NSERC) being developed at BNL. In this paper, an overview of BNL's energy research agenda is given, along with a description of the 37MWp solar array and the NSERC.

Lofaro R.; Villaran, M; Colli, A.

2012-06-03T23:59:59.000Z

340

PHOTOVOLTAICS AND COMMERCIAL BUILDINGS--  

E-Print Network [OSTI]

know that solar energy is environ- mentally attractive--and that photovoltaic or PV systems have made's electrical output matches well with patterns of energy use in commercial buildings, promoting effective convey tax advantages, such as accelerated depreciation and a federal income tax credit. M ost people

Perez, Richard R.

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

EIA - The National Energy Modeling System: An Overview 2003-Renewable Fuels  

Gasoline and Diesel Fuel Update (EIA)

Renewable Fuelsl Module Renewable Fuelsl Module The National Energy Modeling System: An Overview 2003 Renewable Fuels Module Figure 11. Renewable Fuels Module Structure. Need help, contact the National Energy Information Center at 202-586-8800. Renewable Fuels Module Table. Need help, contact the National Energy Information Center at 202-586-8800. The renewable fuels module (RFM) represents renewable energy resoures and large–scale technologies used for grid-connected U.S. electricity supply (Figure 11). Since most renewables (biomass, conventional hydroelectricity, geothermal, landfill gas, solar photovoltaics, solar thermal, and wind) are used to generate electricity, the RFM primarily interacts with the electricity market module (EMM). New renewable energy generating capacity is either model–determined or

342

Optimization of Electric Power Systems for Off-Grid Domestic Applications: An Argument for Wind/Photovoltaic Hybrids  

SciTech Connect (OSTI)

The purpose of this research was to determine the optimal configuration of home power systems relevant to different regions in the United States. The hypothesis was that, regardless of region, the optimal system would be a hybrid incorporating wind technology, versus a photovoltaic hybrid system without the use of wind technology. The method used in this research was HOMER, the Hybrid Optimization Model for Electric Renewables. HOMER is a computer program that optimizes electrical configurations under user-defined circumstances. According to HOMER, the optimal system for the four regions studied (Kansas, Massachusetts, Oregon, and Arizona) was a hybrid incorporating wind technology. The cost differences between these regions, however, were dependent upon regional renewable resources. Future studies will be necessary, as it is difficult to estimate meteorological impacts for other regions.

Jennings, W.; Green, J.

2001-01-01T23:59:59.000Z

343

Plug-and-Play Photovoltaics  

Broader source: Energy.gov [DOE]

On December 7, 2012, DOE announced $21 million in funding for the Plug-and-Play Photovoltaics funding opportunity. Part of the SunShot Systems Integration efforts, the following projects were...

344

SERC Photovoltaics for Residential Buildings Webinar Transcript  

Broader source: Energy.gov [DOE]

A presentation sponsored by the U.S. Department of Energy about using solar photovoltaics (PV) systems to provide electricity for homes.

345

Dazhan Photovoltaic Co | Open Energy Information  

Open Energy Info (EERE)

City, Zhejiang Province, China Sector: Solar Product: China-based solar energy cell and LED automatic lighting systems manufacturer. References: Dazhan Photovoltaic Co1 This...

346

NREL: Photovoltaics Research - News Release Archives  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

lower labor costs, drives China's current advantage in manufacturing photovoltaic (PV) solar energy systems, according to a new report released today by the Energy Department's...

347

Sandia National Laboratories: Glitter-Sized Photovoltaic Cells...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ClimateECEnergyGlitter-Sized Photovoltaic Cells in Utility-Scale Solar Power Systems Glitter-Sized Photovoltaic Cells in Utility-Scale Solar Power Systems Building a Microgrid Greg...

348

Reliability Assessment of Fault-Tolerant Dc-Dc Converters for Photovoltaic Applications  

E-Print Network [OSTI]

Reliability Assessment of Fault-Tolerant Dc-Dc Converters for Photovoltaic Applications Sairaj V in photovoltaic energy processing applications is presented. The proposed approach acknowledges the influence through several case studies. Index Terms-- Markov reliability modeling, photovoltaic systems, power

Liberzon, Daniel

349

Analysis of the Benefits of Photovoltaic in High Rise Commercial Buildings  

E-Print Network [OSTI]

further, recent studies have integrated photovoltaic glazed window systems into the building shell. To understand the relationship between photovoltaic windows, energy use and human satisfaction, this paper presents a study of the effects of photovoltaic...

Sylvester, K. E.; Haberl, J. S.

2000-01-01T23:59:59.000Z

350

Integrating Photovoltaic Inverter Reliability into Energy Yield Estimation with Markov Models  

E-Print Network [OSTI]

Integrating Photovoltaic Inverter Reliability into Energy Yield Estimation with Markov Models of the inverters. Keywords-Photovoltaic energy conversion, Markov reliability models, utility-interactive inverters, energy yield estimation. I. INTRODUCTION Photovoltaic systems have gained prominence as economically

Liberzon, Daniel

351

NREL: Learning - Photovoltaics for Small Business  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Photovoltaics for Small Business Photovoltaics for Small Business Photo of a factory with a photovoltaic system. This furniture factory in Massachusetts uses a photovoltaic system to generate its own electricity. The following resources will help your small business install a photovoltaic (PV) system. If you are unfamiliar with PV systems, see the introduction to PV. Resources American Solar Energy Society Provides consumers with information about solar energy and resources. Database of State Incentives for Renewables and Efficiency Provides information on state, local, utility, and selected federal incentives that promote renewable energy. Florida Solar Energy Center The Florida Solar Energy Center provides basic information on photovoltaics for consumers. Own Your Power! A Consumer Guide to Solar Electricity

352

Supporting Photovoltaics in Market-Rate Residential New Construction: A Summary of Programmatic Experience to Date and Lessons Learned  

E-Print Network [OSTI]

Photovoltaic System and New York Energy Star- Labeled HomePhotovoltaic System and New York Energy Star- Labeled Homes Photovoltaic System and New York Energy Star-Labeled Home

Barbose, Galen; Wiser, Ryan; Bolinger, Mark

2006-01-01T23:59:59.000Z

353

SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Innovative Ballasted Flat Roof Innovative Ballasted Flat Roof Solar Photovoltaic Racking System to someone by E-mail Share SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System on Facebook Tweet about SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System on Twitter Bookmark SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System on Google Bookmark SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System on Delicious Rank SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System on Digg Find More places to share SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System on AddThis.com... Concentrating Solar Power Photovoltaics

354

Photovoltaic Energy Program Overview Fiscal Year 1996  

SciTech Connect (OSTI)

Significant activities in the National Photovoltaic Program are reported for each of the three main program elements. In Research and Development, advances in thin-film materials and crystalline silicon materials are described. The Technology Development report describes activities in photovoltaic manufacturing technology, industrial expansion, module and array development, and testing photovoltaic system components. Systems Engineering and Applications projects described include projects with government agencies, projects with utilities, documentation of performance for international applications, and product certification.

NONE

1997-05-01T23:59:59.000Z

355

Evaluation of a photovoltaic energy mechatronics system with a built-in quadratic maximum power point tracking algorithm  

SciTech Connect (OSTI)

The historically high cost of crude oil price is stimulating research into solar (green) energy as an alternative energy source. In general, applications with large solar energy output require a maximum power point tracking (MPPT) algorithm to optimize the power generated by the photovoltaic effect. This work aims to provide a stand-alone solution for solar energy applications by integrating a DC/DC buck converter to a newly developed quadratic MPPT algorithm along with its appropriate software and hardware. The quadratic MPPT method utilizes three previously used duty cycles with their corresponding power outputs. It approaches the maximum value by using a second order polynomial formula, which converges faster than the existing MPPT algorithm. The hardware implementation takes advantage of the real-time controller system from National Instruments, USA. Experimental results have shown that the proposed solar mechatronics system can correctly and effectively track the maximum power point without any difficulties. (author)

Chao, R.M.; Ko, S.H.; Lin, I.H. [Department of Systems and Naval Mechatronics Engineering, National Cheng Kung University, Tainan, Taiwan 701 (China); Pai, F.S. [Department of Electronic Engineering, National University of Tainan (China); Chang, C.C. [Department of Environment and Energy, National University of Tainan (China)

2009-12-15T23:59:59.000Z

356

Balance-of-System Equipment Required for Renewable Energy Systems |  

Broader source: Energy.gov (indexed) [DOE]

Balance-of-System Equipment Required for Renewable Energy Systems Balance-of-System Equipment Required for Renewable Energy Systems Balance-of-System Equipment Required for Renewable Energy Systems July 2, 2012 - 8:21pm Addthis Both grid-connected and off-grid home renewable energy systems require additional “balance-of-system” equipment. Both grid-connected and off-grid home renewable energy systems require additional "balance-of-system" equipment. How does it work? With a stand-alone system, depending on your needs, balance-of-system equipment could account for half of your total system costs. For both stand-alone and grid-connect systems, you will need power conditioning equipment, safety equipment, and meters and instrumentation. For stand-alone systems, you will also want batteries and charge controllers.

357

SunShot Initiative: Photovoltaics Research and Development  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Research and Research and Development to someone by E-mail Share SunShot Initiative: Photovoltaics Research and Development on Facebook Tweet about SunShot Initiative: Photovoltaics Research and Development on Twitter Bookmark SunShot Initiative: Photovoltaics Research and Development on Google Bookmark SunShot Initiative: Photovoltaics Research and Development on Delicious Rank SunShot Initiative: Photovoltaics Research and Development on Digg Find More places to share SunShot Initiative: Photovoltaics Research and Development on AddThis.com... Concentrating Solar Power Photovoltaics Research & Development Crystalline Silicon Thin Films Multijunctions Organic Photovoltaics Dye-Sensitized Solar Cells Competitive Awards Systems Integration Balance of Systems Photovoltaics Research and Development

358

Compulsive policy-making—The evolution of the German feed-in tariff system for solar photovoltaic power  

Science Journals Connector (OSTI)

Abstract In recent years, policy approaches that build upon the notion of innovation systems have enjoyed increasing attention in science, technology and innovation policy. But while the usefulness of systemic thinking in policy-making has been demonstrated in a large number of empirical settings, we still lack a detailed understanding of the dynamics at play when policy makers address systemic problems. In this paper, we show how complex interdependencies and the uncertain nature of technological change shape the process of targeted policy interventions in socio-technical systems. Toward this end we analyzed the evolution of the German feed-in tariff (FIT) system for solar photovoltaic power, a highly effective and widely copied policy instrument targeted at fostering the diffusion and development of renewable energy technologies. We find that the policy has been subject to a considerable amount of changes, many of which are the result of policy makers addressing specific system issues and bottlenecks. Interestingly, however, often these issues themselves were driven by unforeseen technological developments induced by previous policy interventions. We argue that the pattern of policy serving as both a solution to and a driver of technological bottlenecks shows strong similarities with what Rosenberg (1969) called ‘compulsive sequences’ in the development of technical systems. By shedding more light on how the characteristics of socio-technical systems affect policy interventions, our framework represents a first step toward more closely integrating the literature on innovation systems with the work on policy learning.

Joern Hoppmann; Joern Huenteler; Bastien Girod

2014-01-01T23:59:59.000Z

359

NREL: Photovoltaics Research - Events  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

success. The following events and meetings are of interest to partners of NREL Photovoltaics (PV) Research and the National Center for Photovoltaics (NCPV). Printable Version...

360

Tracking the Sun VII: An Historical Summary of the Installed Price of Photovoltaics in the United States from 1998 to 2013  

SciTech Connect (OSTI)

As the deployment of grid-connected solar photovoltaic (PV) systems has increased, so too has the desire to track the cost and price of these systems. This report helps to fill this need by summarizing trends in the installed price of grid-connected PV systems in the United States from 1998 through 2013, with partial data for the first half of 2014. The analysis is based on project-level data for more than 300,000 individual residential, commercial, and utility-scale PV systems installed across 33 states and representing 80% of all grid-connected PV capacity installed in the United States through 2013. It is essential to note at the outset what the data presented within this report represent. First, the data consist of prices paid to project developers or installers (prior to receipt of any incentives), and for a variety of reasons, those prices may differ from the underlying costs borne by project developers/installers. Second, the data are historical, focusing primarily on projects installed through the end of 2013, and therefore do not reflect the price of projects installed more recently (with the exception of the limited set of results presented for systems installed in the first half of 2014); nor are the data indicative of prices currently being quoted for prospective projects to be installed at a later date. For these reasons and others, the results presented in this report may differ from current PV price or cost benchmarks. Third, by focusing on the up-front price paid by the PV system owner prior, the report does not capture trends associated with PV performance or other factors that impact the levelized cost of electricity for PV. Finally, the underlying data collected for this report include third party owned (TPO) projects where either the system is leased to the site-host or the generation output is sold to the site-host under a power purchase agreement. For a subset of TPO systems, the installed price data represent appraised values rather than transaction prices, and those projects were removed from the data sample in order to eliminate any associated bias. The report presents one set of installed price trends for residential and commercial PV systems, and another set for utility-scale PV. In all cases, installed prices are identified in terms of real 2013 dollars per installed watt (DC-STC), prior to receipt of any direct financial incentives or tax credits. This report separately summarizes installed price data for utility-scale PV projects, drawing upon data also presented in LBNL’s companion report, Utility Scale Solar 2013: An Empirical Analysis of Project Cost, Performance, and Pricing Trends in the United States. For our purposes, utility-scale PV is defined to consist of ground-mounted projects larger than 5 MW. The sample of installed price data includes 97 projects with commercial operation dates spanning the period 2007- 2013. Several important features of the utility-scale data are worth noting, in addition to those noted earlier for the dataset as a whole. First, the sample includes only fully operational projects for which all individual phases are in operation and treats all phases as a single project with a commercial operation date based on the final phase. Second, installed prices reported for utility-scale projects often reflect transactions that occurred several years before project completion; the prices reported for some of these projects may not fully capture recent reductions in module costs or other changes in market conditions, and thus may exhibit a relatively large “temporal lag”.

Barbose, Galen; Weaver, Samantha; Darghouth, Naim

2014-08-26T23:59:59.000Z

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

NREL: Learning - Photovoltaics for Electricity Providers  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Photovoltaics for Electricity Providers Photovoltaics for Electricity Providers Photo of a photovoltaic system in Virginia. This 15-kilowatt photovoltaic system in Virginia feeds clean energy into the utility grid that supplies the Pentagon with electricity. Utility companies can use the resources on this page to find out more about how utilities are using solar photovoltaics (PV) as well as information about designing solar energy programs. Research, Development and Deployment Utility Technical Engagement A central resource for utilities interested in designing solar energy programs and networking with other utilities with existing solar programs from the U.S. Department of Energy (DOE) Solar Program. NREL Photovoltaics Research A central resource for our nation's capabilities in PV, uniting diverse R&D

362

Tracking the Sun III; The Installed Cost of Photovoltaics in the United States from 1998-2009  

E-Print Network [OSTI]

Investigation of Photovoltaic Cost Trends in California.photovoltaic (PV) systems has increased, so too has the desire to track the installed costPhotovoltaic Power Systems. Figure 13. Comparison of Average Installed Costs (

Barbose, Galen

2011-01-01T23:59:59.000Z

363

Economic evaluation of small-scale photovoltaic hybrid systems for mini-grid applications in far north Cameroon  

Science Journals Connector (OSTI)

A comparison between photovoltaic hybrid systems (PVHS), standalone photovoltaic (PV) and standalone diesel generator options is performed using the net present value (NPV) technique. A typical village mini-grid energy demand of 7.08 kWh/day is considered in the computation of energy costs and breakeven grid distances. A first sensitivity analysis is conducted using remote diesel prices of 0.8 €/l, 0.98 €/l, 1.12 €/l, 1.28 €/l with a PV module cost of 7.5 €/Wp. A second sensitivity analysis is also done using PV module costs of 5.25 €/Wp, 6 €/Wp, 6.75 €/Wp, 7.5 €/Wp with a diesel price of 1.12 €/l. The energy cost for the diesel option was found to be 0.812 €/kWh at a diesel fuel price of 1.12 €/l. The sensitivity analyses showed that minimum energy costs were attained in PVHS at renewable energy fractions in the range 82.6–95.3%. In the second sensitivity analysis the energy costs and breakeven grid distances were found to be in the ranges 0.692–0.785 €/kWh and 5.1–5.9 km respectively. For a PV module cost of 5.25 €/Wp, the lowest energy cost for the PVHS option was 0.692 €/kWh at a final renewable energy fraction of 95.3% with the diesel generator hours being 37 h compared to 2075 h in the standalone diesel generator option. Consequently, a 30% reduction in custom duties and taxes on imported PV modules and sub-systems would increase the use of small-scale and climate friendly PV mini-grids in remote areas of far north Cameroon that have an annual insolation of at least 5.55 kWh/m2/day.

Nfah Eustace Mbaka; Ngundam John Mucho; Kenne Godpromesse

2010-01-01T23:59:59.000Z

364

Analysis of electromechanical interactions in a flywheel system with a doubly fed induction machine  

E-Print Network [OSTI]

This paper analyzes the electromechanical inter-action in a flywheel system with a doubly fed induction machine, used for wind farm power smoothing or grid frequency response control. The grid-connected electrical machine ...

Ran, Li

365

Nanostructured photovoltaics  

Science Journals Connector (OSTI)

Energy and the environment are two of the most important global issues that we currently face. The development of clean and sustainable energy resources is essential to reduce greenhouse gas emission and meet our ever-increasing demand for energy. Over the last decade photovoltaics, as one of the leading technologies to meet these challenges, has seen a continuous increase in research, development and investment. Meanwhile, nanotechnology, which is considered to be the technology of the future, is gradually revolutionizing our everyday life through adaptation and incorporation into many traditional technologies, particularly energy-related technologies, such as photovoltaics. While the record for the highest efficiency is firmly held by multijunction III–V solar cells, there has never been a shortage of new research effort put into improving the efficiencies of all types of solar cells and making them more cost effective. In particular, there have been extensive and exciting developments in employing nanostructures; features with different low dimensionalities, such as quantum wells, nanowires, nanotubes, nanoparticles and quantum dots, have been incorporated into existing photovoltaic technologies to enhance their performance and/or reduce their cost. Investigations into light trapping using plasmonic nanostructures to effectively increase light absorption in various solar cells are also being rigorously pursued. In addition, nanotechnology provides researchers with great opportunities to explore the new ideas and physics offered by nanostructures to implement advanced solar cell concepts such as hot carrier, multi-exciton and intermediate band solar cells. This special issue of Journal of Physics D: Applied Physics contains selected papers on nanostructured photovoltaics written by researchers in their respective fields of expertise. These papers capture the current excitement, as well as addressing some open questions in the field, covering topics including the III–V quantum well superlattice and quantum dot solar cells, Si quantum dot tandem cells, nanostructure-enhanced dye-sensitized solar cells and nanopatterned organic solar cells. We thank all the authors and reviewers for their contribution to this special issue. Special thanks are due to the journal's Publisher, Dr Olivia Roche and the editorial and publishing staff for their help and support.

Lan Fu; H Hoe Tan; Chennupati Jagadish

2013-01-01T23:59:59.000Z

366

Photovoltaic solar system connected to the electric power grid operating as active power generator and reactive power compensator  

SciTech Connect (OSTI)

In the case of photovoltaic (PV) systems acting as distributed generation (DG) systems, the DC energy that is produced is fed to the grid through the power-conditioning unit (inverter). The majority of contemporary inverters used in DG systems are current source inverters (CSI) operating at unity power factor. If, however, we assume that voltage source inverters (VSI) can replace CSIs, we can generate reactive power proportionally to the remaining unused capacity at any given time. According to the theory of instantaneous power, the inverter reactive power can be regulated by changing the amplitude of its output voltage. In addition, the inverter active power can be adjusted by modifying the phase angle of its output voltage. Based on such theory, both the active power supply and the reactive power compensation (RPC) can be carried out simultaneously. When the insolation is weak or the PV modules are inoperative at night, the RPC feature of a PV system can still be used to improve the inverter utilisation factor. Some MATLAB simulation results are included here to show the feasibility of the method. (author)

Albuquerque, Fabio L.; Moraes, Adelio J.; Guimaraes, Geraldo C.; Sanhueza, Sergio M.R.; Vaz, Alexandre R. [Universidade Federal de Uberlandia, Uberlandia-MG, CEP 38400-902 (Brazil)

2010-07-15T23:59:59.000Z

367

Seawater pumping as an electricity storage solution for photovoltaic energy systems  

Science Journals Connector (OSTI)

Abstract The stochastic nature of several renewable energy sources has raised the problem of designing and building storage facilities, which can help the electricity grid to sustain larger and larger contribution of renewable energy. Seawater pumped electricity storage is proposed as a good option for PV (Photovoltaic) or solar thermal power plants, located in suitable places close to the coast line. Solar radiation has a natural daily cycle, and storage reservoirs of limited capacity can substantially reduce the load to the electricity grid. Different modes of pump operation (fixed or variable speed) are considered, the preliminary sizing of the PV field and seawater reservoir is performed, and the results are comparatively assessed over a year-long simulated operation. The results show that PV pumped storage, even if not profitable in the present situation of the renewable energy Italian electricity market, is effective in decreasing the load on the transmission grid, and would possibly be attractive in the future, also in the light of developing off-grid applications.

Giampaolo Manfrida; Riccardo Secchi

2014-01-01T23:59:59.000Z

368

Tracking the Sun II: The Installed Cost of Photovoltaics in the U.S. from 1998-2008  

E-Print Network [OSTI]

Investigation of Photovoltaic Cost Trends in California,Investigation of Photovoltaic Cost Trends in California.photovoltaic (PV) systems have grown in number, so too has the desire to track the installed cost

Barbose, Galen L

2010-01-01T23:59:59.000Z

369

Hybrid solar thermal-photovoltaic systems demonstration, Phase I and II. Final technical progress report, July 5, 1979-December 1982  

SciTech Connect (OSTI)

The purpose of the project is to investigate a system based on combined photovoltaic/thermal (PV/T) panels to supply the energy needs of a small single family residence. The system finally selected and constructed uses PV/T panels which utilize air as the heat transfer medium. Optimization of thermal performance was accomplished by attaching metal fins to the back surface of each cell which significantly increased the heat transfer coefficient from the solar cells to the air stream. The other major components of the selected system are an air-to-air heat pump, a rock bin thermal energy storage bin, a synchronous dc-to-ac converter, a microprocessor to control the system, a heat exchanger for the domestic hot water system and of course the building itself which is a one story, well insulated structure having a floor area of 1200 ft/sup 2/. A prototype collector was constructed and tested. Based on this experience, twenty collectors, containing 2860 four inch diameter solar cells, were constructed and installed on the building. Performance of the system was simulated using a TRNSYS-derived program, modified to accommodate PV/T panels and to include the particular components included in the selected system. Simulation of the performance showed that about 65 percent of the total annual energy needs of the building would be provided by the PV/T system. Of this total, about one half is produced at a time when it can be used in the building and one half must be sold back to the utility.

Loferski, J.J. (ed.)

1983-12-01T23:59:59.000Z

370

Performance and Analysis of Photovoltaic (PV)Technologies  

E-Print Network [OSTI]

Performance and Analysis of Photovoltaic (PV)Technologies at Selected Sites This report presents As part of Cooperative Agreement No. DE-EE0003507 Under Task 3.1: Photovoltaic Systems September 2014`i at Manoa #12;Performance and Analysis of Different Photovoltaic Technologies at Selected Sites Prepared

371

CMOS Photovoltaic-cell Layout Configurations for Harvesting Microsystems  

E-Print Network [OSTI]

CMOS Photovoltaic-cell Layout Configurations for Harvesting Microsystems Rajiv Damodaran Prabha, and radiation, photovoltaic (PV) systems are appealing options. Still, chip-sized CMOS PV cells produce only well in substrate cell are better. Index Terms--Ambient light energy, harvester, CMOS photovoltaic (PV

Rincon-Mora, Gabriel A.

372

Energy Policy 30 (2002) 477499 Photovoltaic module quality in  

E-Print Network [OSTI]

Energy Policy 30 (2002) 477­499 Photovoltaic module quality in the Kenyan solar home systems market purchases of clean decentralized photovoltaic technologies. Small amorphous-silicon modules dominate. This article analyzes market failure associated with photovoltaic module quality in the Kenyan SHS market

Kammen, Daniel M.

373

Solar photovoltaic residence in Carlisle, Massachusetts  

SciTech Connect (OSTI)

The first solar photovoltaic house designed and constructed under the US Department of Energy's Solar Photovoltaic Residential Project has been completed. The house, which is powered by a 7-kWp PV system, will be used to assess the occupants' acceptance of and reactions to residential photovoltaic systems and to familiarize utilities, builders, developers, town building officials and others with issues concerning photovoltaic installations. The house is located on a two-acre lot in Carlisle, approximately twenty miles northwest of Boston. Built by a local architect/developer team, the house includes energy conservation and passive solar features. It utilizes a roof-mounted, flat-plate PV array which operates in a two-way energy exchange mode with the electric utility. The energy conservation and passive solar features of this house are described and a detailed description of the utility-interactive photovoltaic system is presented, along with initial performance data.

Strong, S. J.; Nichols, B. E.

1981-01-01T23:59:59.000Z

374

NREL: Photovoltaics Research Home Page  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Photo of Photovoltaic Solar Panels. Photo of Photovoltaic Solar Panels. Solar Installer Surveys DOE needs your input to reduce the "soft costs" of solar PV installations that impact your business. Complete the residential survey and commercial survey today! Photovoltaic (PV) research at the National Renewable Energy Laboratory (NREL) focuses on boosting solar cell conversion efficiencies, lowering the cost of solar cells, modules, and systems, and improving the reliability of PV components and systems. NREL's PV effort contributes to these goals through fundamental research, advanced materials and devices, and technology development. Our scientists are pursuing critical activities that will help to accomplish the goal of the U.S. Department of Energy's SunShot Initiative-to make large-scale solar energy systems cost-competitive with

375

Photovoltaic Systems, the experience curve, and learning by doing : who is learning and what are they doing?  

E-Print Network [OSTI]

The photovoltaics industry has been growing at extraordinary rates over the past ten years as a result of increased government support for the technology. Yet supporting the technology is expensive and there is uncertainty ...

Colatat, Phech C

2009-01-01T23:59:59.000Z

376

Power Control and Optimization of Photovoltaic and Wind Energy Conversion Systems /  

E-Print Network [OSTI]

77 5.2 Wind Energy Conversion System . . . . .Optimization and Control in Wind Energy Conversion SystemsAC matrix con- verter for wind energy conversion system,” in

Ghaffari, Azad

2013-01-01T23:59:59.000Z

377

Enhancing performance of a linear dielectric based concentrating photovoltaic system using a reflective film along the edge  

Science Journals Connector (OSTI)

Abstract In the present study, we model and analyse the performance of a dielectric based linear concentrating photovoltaic system using ray tracing and finite element methods. The results obtained are compared with the experiments. The system under study is a linear asymmetric CPC (Compound Parabolic Concentrator) designed to operate under extreme incident angles of 0° and 55° and have a geometrical concentration ratio of 2.8×. Initial experiments showed a maximum PR (power ratio) of 2.2 compared to a non concentrating counterpart. An improvement to this has been proposed and verified by adding a reflective film along the edges of the concentrator to capture the escaping rays and minimise optical losses. The addition of the reflective film changes the incoming distribution on the solar cell. Results show an increase of 16% in the average power output while using this reflective film. On including the thermal effects it was found that the overall benefit changes to about 6% while using a reflective film. Additionally, the effects of the non-uniformity of the incoming radiation are also analysed and reported for both the cases. It is found that adding the reflective film drops the maximum power at the output by only 0.5% due to the effect of non-uniformity.

Hasan Baig; Nabin Sarmah; Daniel Chemisana; Joan Rosell; Tapas K. Mallick

2014-01-01T23:59:59.000Z

378

Estimating potential photovoltaic yield with r.sun and the open source Geographical Resources Analysis Support System  

SciTech Connect (OSTI)

The package r.sun within the open source Geographical Resources Analysis Support System (GRASS) can be used to compute insolation including temporal and spatial variation of albedo and solar photovoltaic yield. A complete algorithm is presented covering the steps of data acquisition and preprocessing to post-simulation whereby candidate lands for incoming solar farms projects are identified. The optimal resolution to acquire reliable solar energy outputs to be integrated into PV system design software was determined to be 1 square km. A case study using the algorithm developed here was performed on a North American region encompassing fourteen counties in South-eastern Ontario. It was confirmed for the case study that Ontario has a large potential for solar electricity. This region is found to possess over 935,000 acres appropriate for solar farm development, which could provide 90 GW of PV. This is nearly 60% of Ontario's projected peak electricity demand in 2025. The algorithm developed and tested in this paper can be generalized to any region in the world in order to foster the most environmentally-responsible development of large-scale solar farms. (author)

Nguyen, H.T.; Pearce, J.M. [Department of Mechanical and Materials Engineering, Queen's University, 60 Union Street, Kingston, Ontario (Canada)

2010-05-15T23:59:59.000Z

379

Basic photovoltaic principles and methods  

SciTech Connect (OSTI)

This book presents a nonmathematical explanation of the theory and design of photovoltaic (PV) solar cells and systems. The basic elements of PV are introduced: the photovoltaic effect, physical aspects of solar cell efficiency, the typical single-crystal silicon solar cell, advances in single-crystal silicon solar cells. This is followed by the designs of systems constructed from individual cells, including possible constructions for putting cells together and the equipment needed for a practical producer of electrical energy. The future of PV is then discussed. (LEW)

Hersch, P.; Zweibel, K.

1982-02-01T23:59:59.000Z

380

Photovoltaics | Open Energy Information  

Open Energy Info (EERE)

Photovoltaics Photovoltaics (Redirected from Photovoltaic) Jump to: navigation, search (The following text is derived from NREL's description of photovoltaic technology.)[1] Photovoltaic Panels Solar cells, also called photovoltaic (PV) cells by scientists, convert sunlight directly into electricity. PV gets its name from the process of converting light (photons) to electricity (voltage), which is called the PV effect. The PV effect was discovered in 1954, when scientists at Bell Telephone discovered that silicon (an element found in sand) created an electric charge when exposed to sunlight. Soon solar cells were being used to power space satellites and smaller items like calculators and watches. Today, thousands of people power their homes and businesses with individual

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

NREL: Learning - Photovoltaics for Homes  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Homes Homes Photo of solar panels on the roof of a traditional looking home in Colorado. Photovoltaic solar panels installed on the roof of a home in Boulder, Colorado. The following resources will help you install a photovoltaic (PV) system on your home. If you are unfamiliar with PV systems, see the introduction to PV. Resources American Solar Energy Society Provides consumers with information about solar energy and resources. Database of State Incentives for Renewables and Efficiency Provides information on state, local, utility, and selected federal incentives that promote renewable energy. Florida Solar Energy Center Provides basic information on photovoltaics for consumers. Own Your Power! A Consumer Guide to Solar Electricity The U.S. Department of Energy (DOE) answers consumer questions about PV and

382

Energy modeling of photovoltaic thermal systems with corrugated unglazed transpired solar collectors – Part 1: Model development and validation  

Science Journals Connector (OSTI)

Abstract Building-integrated photovoltaic–thermal (BIPV/T) systems with unglazed transpired solar collectors (UTCs) can provide a key solution for on-site electricity and thermal energy generation. Although the energy saving potential of this technology is significant, no systematic thermal analysis model has been developed for optimal system design and integration with building operation. This paper is the first of two companion papers focused on modeling and performance analysis of BIPV/T systems with UTC. In Part 1, energy models are presented for two configurations: UTC only and UTC with PV panels, to predict the cavity exit air temperature and plate surface temperature with weather (incident solar radiation, ambient air temperature, dew point temperature and wind speed) and design (airflow rate or suction velocity and geometry) parameters used as inputs. Nusselt number and effectiveness correlations, representing both the exterior and interior convective heat transfer processes, have been obtained from experimentally validated, three-dimensional, Reynolds-Averaged Navier–Stokes (RANS), Computational Fluid Dynamics (CFD) simulations, using high resolution grids and the ReNormalization Group Methods k–? (RNG k–?) turbulence closure model. The energy models were validated with measurements in an outdoor test-facility. Good agreement was observed between the model prediction and the experimental data, with the root mean square error (RMSE) being within 1 °C for the UTC-only model and within 2 °C for the model of UTC with PV modules. In the companion paper, Part 2, the effects of important parameters on system performance are demonstrated based on information from the literature and simulations using CFD and energy models. The optimal geometry is investigated for both configurations and the performance curves, under different levels of solar radiation, wind speed and suction velocity, are presented to provide guidelines for system design.

Siwei Li; Panagiota Karava; Sam Currie; William E. Lin; Eric Savory

2014-01-01T23:59:59.000Z

383

Photovoltaic deployment strategy in Japan and the USA—an institutional appraisal  

Science Journals Connector (OSTI)

Photovoltaic (PV) is a renewable energy technology, along side with other modular energy generation technologies such as micro-turbines, fuel cells, etc., which will enable the alternative distributed generation paradigm compared to the incumbent fossil fuel based centralized generation paradigm. Distributed generation utilizing renewable energy resources offers opportunities for significant carbon dioxide and emissions reductions thus contributing solutions to broader climate change issues. Yet, renewable energy technologies like PV face various barriers for their widespread adoption. Aside from technical and cost issues, renewable technologies have to overcome the so-called carbon lock-in effects. This refers to the techno-institutional complex associated with the fossil-fuel based centralized generation regime that currently dominates energy production and use. Governmental interventions to address these issues usually can be seen as composed of research, development, demonstration and deployment or RD3 [PCAST, 1999. Panel on International Cooperation in Energy Research, Development, Demonstration, and Deployment]. This paper focused on comparing the deployment aspect of PV technology in Japan and the USA. While both governments promoted PV as part of their larger strategies to address various environmental and energy security issues, Japan has built a PV installation capacity three times that of the USA as of December 2003 with over 90% of PV installation in the grid-connected small residential system category. This is in marked contrast to the case in the USA in which the cumulative installation is spilt among different types of applications involving the grid and off the grid. We put forward two models to explain these differences in deployment strategies and their possible consequences. The first deployment model leverages upon PV as a manufactured technology with minimal customization to achieve massive deployment. The second deployment model leverages upon PV as an information technology-like technology focusing upon user oriented customization to achieve deployment. Different models have different implications to the system engineering aspect of solar PV. A focus upon the standard grid-connected distributed category in the residential setting avoids the heavy customized engineering associated with many off-grid and one-off type projects. Japanese PV deployment strategy of concentrating upon a dominant category or niche with mass market potential also well matches the institutional structure of production [Coase, 1991. The Institutional Structure of Production, in Essays on Economics and Economists. The University of Chicago Press, Chicago] within the local PV technology suppliers industry. Major vertical integrated firms can facilitate system-related learning easier than a fragmented industry within the PV value chain with minimal transaction cost. This highly suggests that deployment strategy of PV or other renewable energy technologies must address the issues of adopting a globally developed technology to local (national) conditions and has strong institutional underpinnings in addition to financial subsidies, learning investment thinking.

Kwok L. Shum; Chihiro Watanabe

2007-01-01T23:59:59.000Z

384

Electricity Bill Savings from Residential Photovoltaic Systems: Sensitivities to Changes in Future Electricity Market Conditions  

E-Print Network [OSTI]

force” additional pumped hydro storage in the system (i.e. ,6.33 GW of pumped hydro storage into the system, in addition

Darghouth, Naim

2014-01-01T23:59:59.000Z

385

Performance of PI controller for control of active and reactive power in DFIG operating in a grid-connected variable speed wind energy conversion system  

Science Journals Connector (OSTI)

Due to several factors, wind energy becomes an essential type of electricity generation. The share of this type of energy in the network is becoming increasingly important. The objective of this work is to presen...

Azzouz Tamaarat; Abdelhamid Benakcha

2014-09-01T23:59:59.000Z

386

Sandia National Laboratories: photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

On September 17, 2012, in MEPV Wins 2012 R&D100 Award On June 20, 2012, in Energy, News, Photovoltaic, Renewable Energy, Solar Sandia's microsystems enabled photovoltaics, also...

387

Status of Solar Photovoltaics  

Science Journals Connector (OSTI)

Before our discussions on the technical aspects of solar photovoltaics, we will first review the status of solar photovoltaics. This chapter begins with a review on ... known barrier to large-scale deployment of ...

Meng Tao

2014-01-01T23:59:59.000Z

388

Photovoltaics (Fact Sheet)  

SciTech Connect (OSTI)

The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

Not Available

2011-06-01T23:59:59.000Z

389

Photovoltaics (Fact Sheet)  

SciTech Connect (OSTI)

The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

Not Available

2010-09-01T23:59:59.000Z

390

An Analysis of Residential PV System Price Differences Between the United States and Germany  

E-Print Network [OSTI]

L. , 1978. Cost of Photovoltaic Energy Systems as Determinedcommercial photovoltaic systems in California. Energy PolicyDepartment of Energy, 2010. $1/W Photovoltaic Systems. White

Seel, Joachim

2014-01-01T23:59:59.000Z

391

Renewable Energy Powered Membrane Technology. 1. Development and Characterization of a Photovoltaic Hybrid Membrane System   

E-Print Network [OSTI]

the unavailability of power in many such situations, renewable energy is an obvious solution to power such systems. However, renewable energy is an intermittent power supply and with regards to the performance of intermittently operated desalination systems, only...

Schäfer, Andrea; Broeckmann, Andreas; Richards, Bryce

2007-01-01T23:59:59.000Z

392

Breakthrough: micro-electronic photovoltaics  

ScienceCinema (OSTI)

Sandia developed tiny glitter-sized photovoltaic (PV) cells that could revolutionize solar energy collection. The crystalline silicon micro-PV cells will be cheaper and have greater efficiencies than current PV collectors. Micro-PV cells require relatively little material to form well-controlled, highly efficient devices. Cell fabrication uses common microelectric and micro-electromechanical systems (MEMS) techniques.

Okandan, Murat; Gupta, Vipin

2014-06-23T23:59:59.000Z

393

Breakthrough: micro-electronic photovoltaics  

SciTech Connect (OSTI)

Sandia developed tiny glitter-sized photovoltaic (PV) cells that could revolutionize solar energy collection. The crystalline silicon micro-PV cells will be cheaper and have greater efficiencies than current PV collectors. Micro-PV cells require relatively little material to form well-controlled, highly efficient devices. Cell fabrication uses common microelectric and micro-electromechanical systems (MEMS) techniques.

Okandan, Murat; Gupta, Vipin

2012-04-23T23:59:59.000Z

394

Utilization of Direct and Diffuse Sunlight in a Dye-Sensitized Solar Cell — Silicon Photovoltaic Hybrid Concentrator System  

Science Journals Connector (OSTI)

Nanocrystalline dye-sensitized solar cells (DSSCs) and organic photovoltaics (OPV) are two families of low-cost solar devices that absorb light in the visible part of the spectrum. ... del Cueto, J. A.Comparison of Energy Production and Performance from Flat-Plate Photovoltaic Module Technologies Deployed at Fixed Tilt. ... dye-sensitized solar cell as a top cell for high-energy photons, and a Cu In Ga selenide thin-film bottom cell for lower-energy photons, produces AM 1.5 solar to elec. ...

Greg D. Barber; Paul G. Hoertz; Seung-Hyun Anna Lee; Neal M. Abrams; Janine Mikulca; Thomas E. Mallouk; Paul Liska; Shaik M. Zakeeruddin; Michael Grätzel; Anita Ho-Baillie; Martin A. Green

2011-02-28T23:59:59.000Z

395

Electricity Bill Savings from Residential Photovoltaic Systems: Sensitivities to Changes in Future Electricity Market Conditions  

E-Print Network [OSTI]

demand response scenario—includes a simulated system- wide price elasticityPrice Elasticity ($/ton) Notes: C = carbon; NG = natural gas; RE = renewable energy; DR = demand response.

Darghouth, Naim

2014-01-01T23:59:59.000Z

396

The Impact of Retail Rate Structures on the Economics of Commercial Photovoltaic Systems in California  

E-Print Network [OSTI]

their PV output through a feed-in tariff, and PV systems areU.S. at least, where feed-in tariffs are not prevalent, PV

Mills, Andrew

2009-01-01T23:59:59.000Z

397

Electricity Bill Savings from Residential Photovoltaic Systems: Sensitivities to Changes in Future Electricity Market Conditions  

E-Print Network [OSTI]

schemes on power prices: The case of wind electricity inand Wind Penetration. IEEE Transactions on Power Systems 27,of wind (50%), PV (35%), and concentrating solar power (CSP,

Darghouth, Naim

2014-01-01T23:59:59.000Z

398

Producer-Focused Life Cycle Assessment of Thin-Film Silicon Photovoltaic Systems  

E-Print Network [OSTI]

system functional life, and energy mix consumed duringlocation influences the energy mix consumed duringlocation influences the energy mix offset by the output of

Zhang, Teresa Weirui

2011-01-01T23:59:59.000Z

399

An Analysis of the Effects of Photovoltaic Energy Systems on Residential Selling Prices in California.  

E-Print Network [OSTI]

CPUC) (2010) CPUC California Solar Initiative: 2009 ImpactCPUC). (2011) California Solar Statistics. http://systems through the California Solar Initiative program.

Cappers, Peter

2012-01-01T23:59:59.000Z

400

High Temperature InGaN Topping Cells for Hybrid Photovoltaic/Concentrating Solar Thermal Systems  

Science Journals Connector (OSTI)

Hybrid PV/CSP systems offer the potential of higher solar to grid efficiency, with the benefits of dispatchable electricity from thermal storage. Here we present an implementation...

Honsberg, Christiana; Gleckman, Philip; Doolittle, William A; Ponce, Fernando; Arena, Chantal; Vasileska, Dragica; Goodnick, Stephen M

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Utility Aspects of Photovoltaics in Europe  

Science Journals Connector (OSTI)

First of all, mention is made of the interest that electric utilities might have in using photovoltaic systems, in the not-to-distant future, to supply isolated houses and small communities that, for technical...

G. P. Pacati; A. Taschini

1981-01-01T23:59:59.000Z

402

The impact of retail rate structures on the economics of commercial photovoltaic systems in California  

E-Print Network [OSTI]

their PV output through a feed-in tariff, and PV systems areIn contrast to feed-in tariffs, net metering generallyU.S. at least, where feed-in tariffs are not prevalent, PV

Mills, Andrew D.

2009-01-01T23:59:59.000Z

403

Producer-Focused Life Cycle Assessment of Thin-Film Silicon Photovoltaic Systems  

E-Print Network [OSTI]

at operational TF-Si PV plants. Hot UPW (T ż 85 C) is notPlants: Annual and Cumulative In- stalled Power Output Capacity. PVPV system may be much higher than for the coal-fired power plant.

Zhang, Teresa Weirui

2011-01-01T23:59:59.000Z

404

Power Control and Optimization of Photovoltaic and Wind Energy Conversion Systems /  

E-Print Network [OSTI]

be realized by capturing wind power at altitudes over the2011. [2] ——, “High altitude wind power systems: A survey onOckels, “Optimal cross-wind towing and power generation with

Ghaffari, Azad

2013-01-01T23:59:59.000Z

405

Photovoltaics in the Context of off-Grid Small Power Systems  

Science Journals Connector (OSTI)

The subject area is defined as:-’ stand alone, off-grid continuous power systems up to 20 kW’. The paper focuses on the practical criteria which determine cost/effectiveness to the user in different applicatio...

A. Gabriel; A. W. de Ruyter Van Steveninck

1981-01-01T23:59:59.000Z

406

Power System Planning: Emerging Practices Suitable for Evaluating the Impact of High-Penetration Photovoltaics  

SciTech Connect (OSTI)

This report explores the impact of high-penetration renewable generation on electric power system planning methodologies and outlines how these methodologies are evolving to enable effective integration of variable-output renewable generation sources.

Bebic, J.

2008-02-01T23:59:59.000Z

407

The Impact of Retail Rate Structures on the Economics of Commercial Photovoltaic Systems in California  

E-Print Network [OSTI]

with PV Annual PV Energy Production ( $ / kWh ) Expressingwith PV Annual PV Energy Production ( $ / kWh ) It is clearanalysis, and the annual energy production of a PV system,

Wiser, Ryan; Mills, Andrew; Barbose, Galen; Golove, William

2007-01-01T23:59:59.000Z

408

Photovoltaic System Pricing Trends: Historical, Recent, and Near-Term Projections. 2014 Edition (Presentation)  

SciTech Connect (OSTI)

This presentation, based on research at Lawrence Berkeley National Laboratory and the National Renewable Energy Laboratory, provides a high-level overview of historical, recent, and projected near-term PV pricing trends in the United States focusing on the installed price of PV systems. It also attempts to provide clarity surrounding the wide variety of potentially conflicting data available about PV system prices. This PowerPoint is the third edition from this series.

Feldman, D.; Barbose, G.; Margolis, R.; James, T.; Weaver, S.; Darghouth, N.; Fu, R.; Davidson, C.; Booth, S.; Wiser, R.

2014-09-01T23:59:59.000Z

409

Pioneer Valley Photovoltaics Cooperative aka PV Squared | Open Energy  

Open Energy Info (EERE)

Photovoltaics Cooperative aka PV Squared Photovoltaics Cooperative aka PV Squared Jump to: navigation, search Name Pioneer Valley Photovoltaics Cooperative (aka PV Squared) Place New Britain, Connecticut Zip 6051 Sector Solar Product Solar PV system installer. References Pioneer Valley Photovoltaics Cooperative (aka PV Squared)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Pioneer Valley Photovoltaics Cooperative (aka PV Squared) is a company located in New Britain, Connecticut . References ↑ "Pioneer Valley Photovoltaics Cooperative (aka PV Squared)" Retrieved from "http://en.openei.org/w/index.php?title=Pioneer_Valley_Photovoltaics_Cooperative_aka_PV_Squared&oldid=349764"

410

Definition: Photovoltaics | Open Energy Information  

Open Energy Info (EERE)

Photovoltaics Photovoltaics Jump to: navigation, search Dictionary.png Photovoltaics Pertaining to the direct conversion of light into electricity[1][2] View on Wikipedia Wikipedia Definition Photovoltaics (PV) is a method of generating electrical power by converting solar radiation into direct current electricity using semiconductors that exhibit the photovoltaic effect. Photovoltaic power generation employs solar panels composed of a number of solar cells containing a photovoltaic material. Materials presently used for photovoltaics include monocrystalline silicon, polycrystalline silicon, amorphous silicon, cadmium telluride, and copper indium gallium selenide/sulfide. Due to the increased demand for renewable energy sources, the manufacturing of solar cells and photovoltaic arrays has advanced

411

Case Study: Mobile Photovoltaic System at Bechler Meadows Ranger Station, Yellowstone National Park (Brochure)  

SciTech Connect (OSTI)

The mobile PV/generator hybrid system deployed at Bechler Meadows provides a number of advantages. It reduces on-site air emissions from the generator. Batteries allow the generator to operate only at its rated power, reducing run-time and fuel consumption. Energy provided by the solar array reduces fuel consumption and run-time of the generator. The generator is off for most hours providing peace and quiet at the site. Maintenance trips from Mammoth Hot Springs to the remote site are reduced. The frequency of intrusive fuel deliveries to the pristine site is reduced. And the system gives rangers a chance to interpret Green Park values to the visiting public. As an added bonus, the system provides all these benefits at a lower cost than the basecase of using only a propane-fueled generator, reducing life cycle cost by about 26%.

Not Available

2014-03-01T23:59:59.000Z

412

Optimal Sizing of Energy Storage and Photovoltaic Power Systems for Demand Charge Mitigation (Poster)  

SciTech Connect (OSTI)

Commercial facility utility bills are often a strong function of demand charges -- a fee proportional to peak power demand rather than total energy consumed. In some instances, demand charges can constitute more than 50% of a commercial customer's monthly electricity cost. While installation of behind-the-meter solar power generation decreases energy costs, its variability makes it likely to leave the peak load -- and thereby demand charges -- unaffected. This then makes demand charges an even larger fraction of remaining electricity costs. Adding controllable behind-the-meter energy storage can more predictably affect building peak demand, thus reducing electricity costs. Due to the high cost of energy storage technology, the size and operation of an energy storage system providing demand charge management (DCM) service must be optimized to yield a positive return on investment (ROI). The peak demand reduction achievable with an energy storage system depends heavily on a facility's load profile, so the optimal configuration will be specific to both the customer and the amount of installed solar power capacity. We explore the sensitivity of DCM value to the power and energy levels of installed solar power and energy storage systems. An optimal peak load reduction control algorithm for energy storage systems will be introduced and applied to historic solar power data and meter load data from multiple facilities for a broad range of energy storage system configurations. For each scenario, the peak load reduction and electricity cost savings will be computed. From this, we will identify a favorable energy storage system configuration that maximizes ROI.

Neubauer, J.; Simpson, M.

2013-10-01T23:59:59.000Z

413

Community Energy: Analysis of Hydrogen Distributed Energy Systems with Photovoltaics for Load Leveling and Vehicle Refueling  

SciTech Connect (OSTI)

Energy storage could complement PV electricity generation at the community level. Because PV generation is intermittent, strategies must be implemented to integrate it into the electricity system. Hydrogen and fuel cell technologies offer possible PV integration strategies, including the community-level approaches analyzed in this report: (1) using hydrogen production, storage, and reconversion to electricity to level PV generation and grid loads (reconversion scenario); (2) using hydrogen production and storage to capture peak PV generation and refuel hydrogen fuel cell electric vehicles (FCEVs) (hydrogen fueling scenario); and (3) a comparison scenario using a battery system to store electricity for EV nighttime charging (electric charging scenario).

Steward, D.; Zuboy, J.

2014-10-01T23:59:59.000Z

414

Microprocessor-controlled photovoltaic-array loading unit  

SciTech Connect (OSTI)

Described is a microprocessor-controlled test system in operation at the Photovoltaics Advanced Systems Test Facility located at Sandia National Laboratories. The test system is designed to measure the total energy output of photovoltaic arrays. The theory, installation, operation, and calibration of the test system are described.

Russell, D.F.

1982-08-01T23:59:59.000Z

415

Increasing Community Access to Solar: Designing and Developing a Shared Solar Photovoltaic System (Fact Sheet)  

SciTech Connect (OSTI)

This document introduces the Energy Department's new Guide to Community Shared Solar: Utility, Private, and Nonprofit Project Development. The guide is designed to help those who want to develop community shared solar projects - from community organizers and advocates to utility managers and government officials - navigate the process of developing shared systems, from early planning to implementation.

Not Available

2012-06-01T23:59:59.000Z

416

Photovoltaics Value Analysis | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Photovoltaics Value Analysis Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Photovoltaics Value Analysis Focus Area: Renewable Energy Topics: Environmental Website: www.nrel.gov/analysis/pdfs/42303.pdf Equivalent URI: cleanenergysolutions.org/content/photovoltaics-value-analysis Policies: Financial Incentives This study addresses photovoltaics (PV) distributed systems technology development; advanced distribution systems integration; system-level tests and demonstrations; technical and market analysis; resource assessment; and codes, standards, and regulatory implementation. The study defines a set of PV benefits and costs, such as greenhouse gas abatement or reliability, and then examines a series of case studies to ascertain whether the benefits of

417

Solara AG | Open Energy Information  

Open Energy Info (EERE)

installer of small-scale photovoltaics and turbines for boats, campervans and holiday homes, as well as grid-connected systems for houses. References: Solara AG1 This article...

418

Improving grid reliability through integration of distributed PV and energy storage  

Science Journals Connector (OSTI)

Several emerging technologies, namely, high penetration grid-connected distributed photovoltaics (PV), energy storage, and smart grid have seen tremendous growth in recent years. Because of their interconnected nature, the deployed systems are fairly ...

Guohui Yuan

2012-01-01T23:59:59.000Z

419

NREL: Photovoltaics Research - High-Performance Photovoltaics  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

High-Performance Photovoltaics In an ideal multijunction cell, the top layer produces most of the total power, so the top layer should be of the highest quality. However, in...

420

A review of solar photovoltaic panel cooling systems with special reference to Ground coupled central panel cooling system (GC-CPCS)  

Science Journals Connector (OSTI)

Abstract The efficiency of wafer-based crystalline as well as Thin film Solar photovoltaic cells get reduced with increase of panel temperature. It is noted that the efficiency drops by about 0.5% for increase of 1 °C of panel temperature. It is necessary to operate them at low temperatures in order to keep the PV module electrical efficiency at acceptable level. Therefore need for a low-cost cooling system for the Solar panels is felt. The cooling of Solar PV panels is a problem of great practical significance. It has the potential to reduce the cost of solar energy in three ways. First, cooling can improve the electrical production of standard flat plate PV modules. Second, cooling makes possible the use of concentrating PV systems. Finally, the heat removed by the PV cooling system can be used for domestic or industrial use. Various Solar PV panel cooling systems have been developed in past. A new system for cooling of Solar PV panels called the Ground-Coupled Central Panel Cooling System (GC-CPCS) is installed and operational at the Energy Park of Rajiv Gandhi Proudyogiki Vishwavidyalaya (RGPV), Bhopal, India. This paper discusses various Solar PV panel cooling technologies and the testing and performance of the newly developed Ground-Coupled Central Panel Cooling System (GC-CPCS). This study is unique in three ways. First, it introduces the concept of Central cooling of Solar PV panels. Second, Ground Coupled Heat Exchanger is used for the first time in any Solar PV Panel Cooling System. Third, the testing is done on site under actual solar irradiance.

Amit Sahay; V.K. Sethi; A.C. Tiwari; Mukesh Pandey

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Photovoltaic waste assessment in Italy  

Science Journals Connector (OSTI)

Abstract At present, photovoltaics is, after hydro and wind power, the third most important renewable energy source in terms of its capacity to be globally installed; furthermore, for two years in a row, it was the number one new source of electricity generation installed in the European Union. Italy became the second country in the European Union concerning the cumulative installed power of PV (in 2013, the Italian PV cumulative power reached over 17,620 MW), which was also the result of the very attractive support policy. In connection with this development, the issue has emerged about the treatment and disposal of photovoltaic waste when the operative time (approximately twenty-thirty years) of the photovoltaic systems ended. The European Union, to address this environmental impact, passed the Directive 2012/19/EU to increase the amount of waste of electrical and electronic equipment in the form of photovoltaic panels that have been appropriately collected and treated to reduce the volume that become disposed. This paper aims to provide an assessment of the potential waste arising in Italy from the use and end-of-life phases of these renewable energy systems in the coming years and their disposal and/or recycling. Based on the lifetime of 25 years of photovoltaic panels, the estimate has been referred to two periods of waste generation (2012–2038 and 2039–2050). The importance of managing this flow of waste to enhance the correct disposal of the hazardous substances as well as the importance of the recovery and recycling of valuable resources has also been underlined.

Annarita Paiano

2015-01-01T23:59:59.000Z

422

Photovoltaics | Open Energy Information  

Open Energy Info (EERE)

Photovoltaics Photovoltaics (Redirected from Solar Photovoltaics) Jump to: navigation, search (The following text is derived from NREL's description of photovoltaic technology.)[1] Photovoltaic Panels Solar cells, also called photovoltaic (PV) cells by scientists, convert sunlight directly into electricity. PV gets its name from the process of converting light (photons) to electricity (voltage), which is called the PV effect. The PV effect was discovered in 1954, when scientists at Bell Telephone discovered that silicon (an element found in sand) created an electric charge when exposed to sunlight. Soon solar cells were being used to power space satellites and smaller items like calculators and watches. Today, thousands of people power their homes and businesses with individual

423

Photovoltaic Power for the Nanosat Project  

SciTech Connect (OSTI)

This report describes the characteristics of photovoltaic arrays that maybe suitable for use with nanosatellite electronic systems. It includes a thorough literature search on power management and distribution systems for satellites as small as microsatellites. The major conclusion to be drawn is that it is the total system, including satellite electronic system, photovoltaic systems, peak power tracker and the power management and distribution systems which need to be optimized. An example of a peak power tracker is given, and a novel series connected boost unit is described which might allow the system voltage to be increased if enough photovoltaic panels to operate the systems in real time is impractical. Finally, it is recommended that the development effort be oriented and expanded to include a peak power tracker and other power management and distribution systems.

Rose, B.H.

1999-06-01T23:59:59.000Z

424

Chapter VII-2, Practical Handbook of Photovoltaics: Fundamentals and Applications, General editors T. Markvart and L. Castaner, to  

E-Print Network [OSTI]

Chapter VII-2, Practical Handbook of Photovoltaics: Fundamentals and Applications, General editors Brookhaven National Laboratory Upton, NY 11973 1. INTRODUCTION Photovoltaic (PV) technologies have distinct of photovoltaic systems does not produce any noise, toxic-gas emissions, or greenhouse gases. Photovoltaic

Ohta, Shigemi

425

Photovoltaic effects in  

Science Journals Connector (OSTI)

The theory and quantitative analysis of photovoltaic effects in an inhomogeneous semiconductor with a position-dependent energy gap in the presence of a temperature gradient are presented. Transport equations based on the thermodynamics of irreversible processes are used to develop the theory. The transformation of the initial equations and suitable assumption led to a formula revealing and arranging all photovoltaic effects occurring in a semiconductor. Four effects: the bulk photovoltaic Tauc effect; the mobility position-dependence photovoltaic effect; the thermophotovoltaic effect; and the classical Seebeck thermoelectric effect are revealed. Quantitative relations between particular effects and factors determining their significance are shown by means of numerical analysis and suitable diagrams.

T Piotrowski; S Sikorski

2001-01-01T23:59:59.000Z

426

Photovoltaics Business Models  

SciTech Connect (OSTI)

This report summarizes work to better understand the structure of future photovoltaics business models and the research, development, and demonstration required to support their deployment.

Frantzis, L.; Graham, S.; Katofsky, R.; Sawyer, H.

2008-02-01T23:59:59.000Z

427

Sandia National Laboratories: Photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Photovoltaic Regional Test Center (RTC). The RTC will enable research on integrating solar panels into the statewide smart grid and help reduce the cost of solar power. The...

428

Sandia National Laboratories: Photovoltaics  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

outfitted with photovoltaic (PV) installations are a real challenge for the nation's real estate industry, but a new tool developed by Sandia National Laboratories and Solar Power...

429

Sandia National Laboratories: Photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Event On December 4, 2014, in Energy, News, News & Events, Photovoltaic, Renewable Energy, Solar During the TEDxABQ event, Sandia's Vipin Gupta (in the Material, Devices,...

430

Sandia National Laboratories: Photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

July 31, 2014, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities, Grid Integration, Infrastructure Security, News, News & Events, Photovoltaic, Renewable...

431

Photovoltaic Resources and Technologies  

Broader source: Energy.gov [DOE]

This page provides a brief overview of photovoltaic (PV) technologies supplemented by specific information to apply PV within the Federal sector.

432

Sandia National Laboratories: photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Instruments: Solar Glitter On March 21, 2013, in Capabilities, Energy, Partnership, Photovoltaic, Renewable Energy, Research & Capabilities, Solar, SunShot Sandia scientists...

433

Optical Waveguide Enhanced Photovoltaics  

Science Journals Connector (OSTI)

Enhanced light to electric power conversion efficiency of photovoltaic cells ?with a low absorbance was achieved using waveguide integration. We ?present a proof of concept using a...

Rühle, Sven; Greenwald, Shlomit; Koren, Elad; Zaban, Arie

2008-01-01T23:59:59.000Z

434

National Laboratory Photovoltaics Research  

Broader source: Energy.gov [DOE]

DOE supports photovoltaic (PV) research and development and facilities at its national laboratories to accelerate progress toward achieving the SunShot Initiative's technological and economic...

435

NREL: Photovoltaics Research - News  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

For archived editions of the NCPV Hotline. See also PV events. Printable Version Photovoltaics Research Home Silicon Polycrystalline Thin Films Multijunctions New Materials,...

436

NREL: Photovoltaics Research - Webmaster  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

reply. Your name: Your email address: Your message: Send Message Printable Version Photovoltaics Research Home Silicon Polycrystalline Thin Films Multijunctions New Materials,...

437

Lab Breakthrough: Microelectronic Photovoltaics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Microelectronic Photovoltaics Microelectronic Photovoltaics Lab Breakthrough: Microelectronic Photovoltaics June 7, 2012 - 9:31am Addthis Sandia developed tiny glitter-sized photovoltaic (PV) cells that could revolutionize solar energy collection. The crystalline silicon micro-PV cells will be cheaper and have greater efficiencies than current PV collectors. View the entire YouTube Lab Breakthroughs playlist. Michael Hess Michael Hess Former Digital Communications Specialist, Office of Public Affairs What are MEMS? MEMS are microelectromechanical systems. MEMS are made up of components between 1 to 100 micrometers in size. MEMS devices generally range in size from 20 micrometers to a millimeter. Sandia National Lab semiconductor engineer Gregory Nielson and postdoctoral appointee Jose Luis Cruz-Campa recently took some time to discuss their

438

The New 1999 National Electrical Code Coupled with New Standards Clarify Requirements for Installations of Photovoltaic Systems in the U.S.  

SciTech Connect (OSTI)

The National Electrical Code@ (NEC@) focuses primarily on electrical system installation requirements in the U.S. The NEC addresses both fire and personnel safety. This paper will describe recent efforts of the PV industry in the U.S. and the resulting requirements in the 1999 National Electrical Code-- Article 690 --Solar Photovoltaic Systems. The Article 690 requirements spell out the PV-unique requirements for safe installations of PV systems in the U.S.A. This paper provides an overview of the most significant changes that appear in Article 690 of the 1999 edition of the NEC. The related and coordinated efforts of the other standards- making groups will also be briefly reviewed.

Bower, W.

1999-01-08T23:59:59.000Z

439

382 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 2, NO. 3, JULY 2012 Design and Construction of  

E-Print Network [OSTI]

� solar concentration factor (CF)] [1]­[5]. Such systems are potentially low-cost photovoltaic (PV382 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 2, NO. 3, JULY 2012 Design and Construction of a 7� Low-Concentration Photovoltaic System Based on Compound Parabolic Concentrators Mark A. Schuetz, Member, IEEE, Kara A. Shell

Rollins, Andrew M.

440

Performance Optimization of a Photovoltaic Generator with an Active Power Filter Application  

E-Print Network [OSTI]

1 Performance Optimization of a Photovoltaic Generator with an Active Power Filter Application (MPPT) for photovoltaic (PV) systems maximizes the power that can be transferred from the PV system), a constant voltage on the DC side of the inverter was proposed, it is a photovoltaic generator which is used

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Importance of the Donor:Fullerene Intermolecular Arrangement for High-Efficiency Organic Photovoltaics  

E-Print Network [OSTI]

Photovoltaics Kenneth R. Graham,, Clement Cabanetos, Justin P. Jahnke,§ Matthew N. Idso,§ Abdulrahman El Labban *S Supporting Information ABSTRACT: The performance of organic photovoltaic (OPV) material systems the performance of OPV material systems. INTRODUCTION Organic photovoltaics (OPVs) are a promising PV technology

McGehee, Michael

442

Photovoltaics industry profile  

SciTech Connect (OSTI)

A description of the status of the US photovoltaics industry is given. Principal end-user industries are identified, domestic and foreign market trends are discussed, and industry-organized and US government-organized trade promotion events are listed. Trade associations and trade journals are listed, and a photovoltaic product manufacturers list is included. (WHK)

None

1980-10-01T23:59:59.000Z

443

Photovoltaics performance and reliability workshop  

SciTech Connect (OSTI)

This document consists of papers and viewgraphs compiled from the proceedings of a workshop held in September 1992. This workshop was the fifth in a series sponsored by NREL/DOE under the general subject areas of photovoltaic module testing and reliability. PV manufacturers, DOE laboratories, electric utilities and others exchanged technical knowledge and field experience. The topics of cell and module characterization, module and system performance, materials and module durability/reliability research, solar radiation, and applications are discussed.

Mrig, L. (ed.) [ed.

1992-01-01T23:59:59.000Z

444

Photovoltaics | Open Energy Information  

Open Energy Info (EERE)

Photovoltaics Photovoltaics (Redirected from - Solar PV) Jump to: navigation, search (The following text is derived from NREL's description of photovoltaic technology.)[1] Photovoltaic Panels Solar cells, also called photovoltaic (PV) cells by scientists, convert sunlight directly into electricity. PV gets its name from the process of converting light (photons) to electricity (voltage), which is called the PV effect. The PV effect was discovered in 1954, when scientists at Bell Telephone discovered that silicon (an element found in sand) created an electric charge when exposed to sunlight. Soon solar cells were being used to power space satellites and smaller items like calculators and watches. Today, thousands of people power their homes and businesses with individual

445

NREL: Photovoltaics Research - Photovoltaic Energy Ratings Methods  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Photovoltaic Energy Ratings Methods Validation Photovoltaic Energy Ratings Methods Validation The Photovoltaic (PV) Engineering group at NREL validates energy ratings methods by standards committees to establish an energy rating methodology. We are evaluating techniques to account for the impact on PV performance from variations in the spectral distribution of solar radiation. Two types of methods were evaluated for correcting the short-circuit current of PV modules for variations in the solar spectrum under clear skies: (1) empirical relationships based on air mass, and (2) use of spectral irradiance models and PV module spectral response data. Methods of the first type were the Sandia National Laboratories absolute air-mass function, or f(AMa), and the CREST air-mass function, or f(AM). The second

446

Characterization of 3D Photovoltaics  

E-Print Network [OSTI]

Characterization of 3D Photovoltaics SEMICONDUCTORS Our goal is to provide industry with test structures and models of next-generation photovoltaics, with an initial focus on cadmium telluride (Cd (nanostructured) photovoltaic devices. Objective Impact and Customers · The U.S. Photovoltaic Industry Roadmap

447

Advanced photovoltaic-trough development  

SciTech Connect (OSTI)

The scope of the work on photvoltaic troughs includes analytical studies, hardware development, and component testing. Various aspects of the system have been optimized and improvements have been realized, particularly in the receiver and reflecting surface designs. An empirical system performance model has been developed that closely agrees with measured system performance. This in-depth study of single-axis reflecting linear focus photovoltaic concentrators will be very beneficial in the development of improved models for similar systems as well as other phtovoltaic concentrator designs.

Spencer, R.; Yasuda, K.; Merson, B.

1982-04-01T23:59:59.000Z

448

US Photovoltaic Patents, 1988--1990  

SciTech Connect (OSTI)

This document contains US patents on terrestrial photovoltaic (PV) power applications, including systems, components, and materials, as well as manufacturing and support functions. The patent entries in this document were issued from 1988 through 1990. The entries were located by searching USPA, the data base of the US Patent Office. The final search retrieved all patents under the class ``Batteries, Thermoelectric and Photoelectric`` and the subclasses ``Photoelectric,`` ``Testing,`` and ``Applications.`` The search also located patents that contained the words ``photovoltaic(s)`` or ``solar cell(s)`` and their derivatives. A manual search of the patents in the Solar Energy Research Institute (SERI) patent file augmented the data base search. After the initial list was compiled, most of the patents on the following subjects were excluded: space photovoltaic technology, use of the photovoltaic effect for detectors and subjects only peripherally concerned with photovoltaics. Some patents on these three subjects were included when it appeared that those inventions might be of use in terrestrial PV power technologies.

Not Available

1991-12-01T23:59:59.000Z

449

US Photovoltaic Patents, 1988--1990  

SciTech Connect (OSTI)

This document contains US patents on terrestrial photovoltaic (PV) power applications, including systems, components, and materials, as well as manufacturing and support functions. The patent entries in this document were issued from 1988 through 1990. The entries were located by searching USPA, the data base of the US Patent Office. The final search retrieved all patents under the class Batteries, Thermoelectric and Photoelectric'' and the subclasses Photoelectric,'' Testing,'' and Applications.'' The search also located patents that contained the words photovoltaic(s)'' or solar cell(s)'' and their derivatives. A manual search of the patents in the Solar Energy Research Institute (SERI) patent file augmented the data base search. After the initial list was compiled, most of the patents on the following subjects were excluded: space photovoltaic technology, use of the photovoltaic effect for detectors and subjects only peripherally concerned with photovoltaics. Some patents on these three subjects were included when it appeared that those inventions might be of use in terrestrial PV power technologies.

Not Available

1991-12-01T23:59:59.000Z

450

Scattering Properties of nanostructures : applications to photovoltaics  

E-Print Network [OSTI]

high-efficiency low- cost photovoltaic devices has been thehigh-efficiency low-cost photovoltaic devices has been theoverall per unit cost of photovoltaic modules. Module costs

Derkacs, Daniel

2009-01-01T23:59:59.000Z

451

Sandia National Laboratories: Vermont Photovoltaic Regional Test...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Photovoltaic Regional Test Center Launch of Solar Testing Site in Vermont On November 27, 2013, in Energy, Facilities, News, News & Events, Partnership, Photovoltaic, Photovoltaic...

452

Scattering Properties of nanostructures : applications to photovoltaics  

E-Print Network [OSTI]

2nd World Conf. Photovoltaic Energy Conversion, Vienna, p.the 12th European Photovoltaic Solar Energy Conference, p.12th European Photovoltaic Solar Energy Conf. , p. 1481 (

Derkacs, Daniel

2009-01-01T23:59:59.000Z

453

DISSERTATION DEVICE CHARACTERIZATION OF CADMIUM TELLURIDE PHOTOVOLTAICS  

E-Print Network [OSTI]

DISSERTATION DEVICE CHARACTERIZATION OF CADMIUM TELLURIDE PHOTOVOLTAICS Submitted by Russell M Reserved #12;ABSTRACT DEVICE CHARACTERIZATION OF CADMIUM TELLURIDE PHOTOVOLTAICS Thin-film photovoltaics

Sites, James R.

454

Uncertainties in the Value of Bill Savings from Behind-the-Meter, Residential Photovoltaic Systems: The Roles of Electricity Market Conditions, Retail Rate Design, and Net Metering  

E-Print Network [OSTI]

in wholesale energy markets. Progress in Photovoltaics:The Economics of Energy Market Transformation Programs. TheCalifornia's current energy market, for example, allows

Darghouth, Naim Richard

2013-01-01T23:59:59.000Z

455

Uncertainties in the Value of Bill Savings from Behind-the-Meter, Residential Photovoltaic Systems: The Roles of Electricity Market Conditions, Retail Rate Design, and Net Metering  

E-Print Network [OSTI]

CA. Itron, Inc, 2012. CPUC California Solar Initiative; 2010The Solar Alliance, The California Solar Energy IndustriesRates Undermine California’s Solar Photovoltaic Subsidies? (

Darghouth, Naim Richard

2013-01-01T23:59:59.000Z

456

Mesa Top Photovoltaic Array, NREL (Fact Sheet)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Mesa Top Photovoltaic Array Mesa Top Photovoltaic Array System Specifications System size: 720 kilowatts (kW) DC Characteristics: Single axis tracker photovoltaic, ground mounted Annual output: 1.2 gigawatt hours (GWh) Location: Top of South Table Mountain, Golden, Colorado Start of operation: December 2008 Financial Terms System ownership: SunEdison financed, built, owns, operates and maintains the system Solar Power and Services Agreement (SPSA): SunEdison and the Western Area Power Administration (WAPA) entered into a 20-year SPSA to provide Solar Energy Services to the Department of Energy (DOE) for use at the National Renewable Energy Laboratory (NREL) Cost to DOE/NREL: There are no up-front costs to DOE or NREL * The price per kilowatt hour (kWh) for the power purchased from the

457

Mesa Top Photovoltaic Array, NREL (Fact Sheet)  

Broader source: Energy.gov (indexed) [DOE]

Mesa Top Photovoltaic Array Mesa Top Photovoltaic Array System Specifications System size: 720 kilowatts (kW) DC Characteristics: Single axis tracker photovoltaic, ground mounted Annual output: 1.2 gigawatt hours (GWh) Location: Top of South Table Mountain, Golden, Colorado Start of operation: December 2008 Financial Terms System ownership: SunEdison financed, built, owns, operates and maintains the system Solar Power and Services Agreement (SPSA): SunEdison and the Western Area Power Administration (WAPA) entered into a 20-year SPSA to provide Solar Energy Services to the Department of Energy (DOE) for use at the National Renewable Energy Laboratory (NREL) Cost to DOE/NREL: There are no up-front costs to DOE or NREL * The price per kilowatt hour (kWh) for the power purchased from the

458

Enhancing the performance of building integrated photovoltaics  

Science Journals Connector (OSTI)

Recent research in Building Integrated Photovoltaics (BIPV) is reviewed with the emphases on a range of key systems whose improvement would be likely to lead to improved solar energy conversion efficiency and/or economic viability. These include invertors, concentrators and thermal management systems. Advances in techniques for specific aspects of systems design, installation and operation are also discussed.

Brian Norton; Philip C. Eames; Tapas K. Mallick; Ming Jun Huang; Sarah J. McCormack; Jayanta D. Mondol; Yigzaw G. Yohanis

2011-01-01T23:59:59.000Z

459

NREL: Photovoltaics Research - Engineering  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Photovoltaic Engineering Photovoltaic Engineering Photovoltaic (PV) Engineering at NREL supports commercial and emerging PV technology development. Our support covers the following three areas: Engineering Testing and Evaluation. We provide engineering testing and evaluation of PV products developed by companies during work sponsored by the U.S. Department of Energy (DOE). We determine if products meet performance criteria established by DOE for a company's contractual obligations. Standards Development. We support the development of national and international standards. Current work includes investigating methods of preconditioning cadmium telluride and copper indium gallium diselenide PV modules so that when they are tested for reporting conditions, the results are correlated with subsequent field measurements.

460

Development of a Dispatchable PV Peak Shainv System. PV: Bonus Program - Phase 1 Report. Volume 1  

SciTech Connect (OSTI)

This report summarizes the work performed by Delmarva Power and Light and its subcontractors in Phase 1 of the US Department of Energy's PV:BONUS Program. The purpose of the program is to develop products and systems for buildings which utilize photovoltaic (N) technology. Beginning with a cooperative research effort with the University of Delaware's Center for Energy and Environmental Policy Research Delmarva Power developed and demonstrated the concept of Dispatchable PV Peak Shaving. This concept and the system which resulted horn the development work are unique from other grid-connected PV systems because it combines a PV, battery energy storage, power conversion and control technologies into an integrated package. Phase 1 began in July 1993 with the installation of a test and demonstration system at Delmarva's Northern Division General Office building near Newark, Delaware. Following initial testing throughout the summer and fall of 1993, significant modifications were made under an amendment to the DOE contract. Work on Phase 1 concluded in the early spring of 1995. Significant progress towards the goal of commercializing the system was made during Phase 1, and is summarized. Based on progress in Phase 1, a proposal to continue the work in Phase 2 was submitted to the US DOE in May 1995. A contract amendment and providing funds for the Phase 2 work is expected in July 1995.

None

1995-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Health and Safety Concerns of Photovoltaic Solar Panels  

E-Print Network [OSTI]

The generation of electricity from photovoltaic (PV) solar panels is safe and effective. Because PV systems do not burn fossil fuels they do not produce the toxic air or greenhouse gas emissions associated with conventional fossil fuel fired generation technologies. According to the U.S. Department of Energy, few power-generating technologies have as little environmental impact as photovoltaic solar

unknown authors

462

NREL: Energy Analysis - Crystalline Silicon and Thin Film Photovoltaic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Crystalline Silicon and Thin Film Photovoltaic Results - Life Cycle Crystalline Silicon and Thin Film Photovoltaic Results - Life Cycle Assessment Harmonization Life Cycle Greenhouse Gas Emissions from Solar Photovoltaics (Fact Sheet) Cover of the Life Cycle Greenhouse Gas Emissions from Solar Photovoltaics factsheet Download the Fact Sheet Over the last 30 years, hundreds of life cycle assessments (LCAs) have been conducted and published for a variety of residential and utility-scale solar photovoltaic (PV) systems with wide-ranging results. The inconsistencies in these results can be attributed to the technologies evaluated-such as differing system designs, real-world versus conceptual systems, or technology improvements over time-and life cycle assessment methods and assumptions. To better understand greenhouse gas (GHG) emissions from commercial

463

NREL: Learning - Photovoltaics for Farms and Ranches  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Farms and Ranches Farms and Ranches Photo of cows and a photovoltaic powered water pump. Photovoltaic power can be used to pump water for livestock. The following resources will provide you with more information on the uses of solar photovoltaic (PV) systems on farms and ranches, as well as guides to buying and installing a solar energy system. If you are unfamiliar with this technology, see the introduction to PV systems. General Information Energy Savers: Solar Energy Applications for Farms and Ranches Basic information about using solar energy on farms and ranches from the U.S. Department of Energy (DOE). Own Your Power! A Consumer Guide to Solar Electricity This 16-page booklet from the U.S. Department of Energy provides information about how you can use solar energy at home.

464

A comparative evaluation of household preferences for solar photovoltaic standalone and mini-grid system: An empirical study in a costal village of Indian Sundarban  

Science Journals Connector (OSTI)

Solar PhotoVoltaic (SPV) based systems have been widely accepted technology for rural electrification in developing countries. The standalone SPV home lighting system has increasingly been popular among rural households, while SPV mini-grid supply system is being promoted for rural electrification schemes. This study uses data from household survey to explore the impact of household characteristics on the preference for electrical energy from SPV systems. Econometric evidence shows heterogeneity in behavioural pattern for these two SPV systems. The flexibility in use and cost of systems might explain this difference. Household characteristics such as monthly household income, household size, occupational status of household head, number of room and type of house significantly influence household’s decision for SPV standalone home lighting systems. For SPV mini-grid supply household’s income and monthly expenditure on kerosene are significant predictors. The result reported in this paper might be a valuable input for policy makers to frame right policy mix with regard to provide subsidy on rural electrification programmes.

Amit K. Bhandari; Chinmoy Jana

2010-01-01T23:59:59.000Z

465

U.S. Residential Photovoltaic (PV) System Prices, Q4 2013 Benchmarks: Cash Purchase, Fair Market Value, and Prepaid Lease Transaction Prices  

SciTech Connect (OSTI)

The price of photovoltaic (PV) systems in the United States (i.e., the cost to the system owner) has dropped precipitously in recent years, led by substantial reductions in global PV module prices. This report provides a Q4 2013 update for residential PV systems, based on an objective methodology that closely approximates the book value of a PV system. Several cases are benchmarked to represent common variation in business models, labor rates, and module choice. We estimate a weighted-average cash purchase price of $3.29/W for modeled standard-efficiency, polycrystalline-silicon residential PV systems installed in the United States. This is a 46% decline from the 2013-dollar-adjusted price reported in the Q4 2010 benchmark report. In addition, this report frames the cash purchase price in the context of key price metrics relevant to the continually evolving landscape of third-party-owned PV systems by benchmarking the minimum sustainable lease price and the fair market value of residential PV systems.

Davidson, C.; James, T. L.; Margolis, R.; Fu, R.; Feldman, D.

2014-10-01T23:59:59.000Z

466

Photovoltaic module and interlocked stack of photovoltaic modules  

DOE Patents [OSTI]

One embodiment relates to an arrangement of photovoltaic modules configured for transportation. The arrangement includes a plurality of photovoltaic modules, each photovoltaic module including a frame. A plurality of individual male alignment features and a plurality of individual female alignment features are included on each frame. Adjacent photovoltaic modules are interlocked by multiple individual male alignment features on a first module of the adjacent photovoltaic modules fitting into and being surrounded by corresponding individual female alignment features on a second module of the adjacent photovoltaic modules. Other embodiments, features and aspects are also disclosed.

Wares, Brian S.

2014-09-02T23:59:59.000Z

467

photovoltaics | OpenEI  

Open Energy Info (EERE)

photovoltaics photovoltaics Dataset Summary Description This dataset is part of a larger internal dataset at the National Renewable Energy Laboratory (NREL) that explores various characteristics of large solar electric (both PV and CSP) facilities around the United States. This dataset focuses on the land use characteristics for solar facilities that are either under construction or currently in operation. Source Land-Use Requirements for Solar Power Plants in the United States Date Released June 25th, 2013 (5 months ago) Date Updated Unknown Keywords acres area average concentrating solar power csp Density electric hectares km2 land land requirements land use land-use mean photovoltaic photovoltaics PV solar statistics Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon Master Solar Land Use Spreadsheet (xlsx, 1.5 MiB)

468

Photovoltaic versus optical tweezers  

Science Journals Connector (OSTI)

The operation of photovoltaic (PV) tweezers, using the evanescent light-induced PV fields to trap and pattern nano- and micro-meter particles on a LiNbO3 crystal surface,...

Villarroel, Javier; Burgos, Héctor; García-Cabańes, Ángel; Carrascosa, Mercedes; Blázquez-Castro, Alfonso; Agulló-López, Fernando

2011-01-01T23:59:59.000Z

469

Photovoltaic spatial solitons  

Science Journals Connector (OSTI)

We analyze self-trapping of one-dimensional optical beams in photorefractive, photovoltaic media for open- and closed-circuit realizations. We show that a passive load (resistor) in...

Segev, Mordechai; Valley, George C; Bashaw, Matthew C; Taya, Minoru; Fejer, Martin M

1997-01-01T23:59:59.000Z

470

Photovoltaic solar cell  

DOE Patents [OSTI]

A photovoltaic solar cell for generating electricity from sunlight is disclosed. The photovoltaic solar cell comprises a plurality of spaced-apart point contact junctions formed in a semiconductor body to receive the sunlight and generate the electicity therefrom, the plurality of spaced-apart point contact junctions having a first plurality of regions having a first doping type and a second plurality of regions having a second doping type. In addition, the photovoltaic solar cell comprises a first electrical contact electrically connected to each of the first plurality of regions and a second electrical contact electrically connected to each of the second plurality of regions, as well as a passivation layer covering major surfaces and sidewalls of the photovoltaic solar cell.

Nielson, Gregory N; Okandan, Murat; Cruz-Campa, Jose Luis; Resnick, Paul J

2013-11-26T23:59:59.000Z

471

Photovoltaic solar cell  

DOE Patents [OSTI]

A photovoltaic solar cell for generating electricity from sunlight is disclosed. The photovoltaic solar cell comprises a plurality of spaced-apart point contact junctions formed in a semiconductor body to receive the sunlight and generate the electricity therefrom, the plurality of spaced-apart point contact junctions having a first plurality of regions having a first doping type and a second plurality of regions having a second doping type. In addition, the photovoltaic solar cell comprises a first electrical contact electrically connected to each of the first plurality of regions and a second electrical contact electrically connected to each of the second plurality of regions, as well as a passivation layer covering major surfaces and sidewalls of the photovoltaic solar cell.

Nielson, Gregory N; Cruz-Campa, Jose Luis; Okandan, Murat; Resnick, Paul J

2014-05-20T23:59:59.000Z

472

Photovoltaic Research Facilities  

Broader source: Energy.gov [DOE]

The U.S. Department of Energy (DOE) funds photovoltaic (PV) research and development (R&D) at its national laboratory facilities located throughout the country. To encourage further innovation,...

473

Photovoltaic Source Models  

Science Journals Connector (OSTI)

Nowadays, the more and more growing interest in applications of photovoltaic (PV) generation, with all the related problems of optimal exploitation, environmental impact, and grid stability, has determined a...

Maria Carmela Di Piazza; Gianpaolo Vitale

2013-01-01T23:59:59.000Z

474

Sustainability of Large Photovoltaic Deployment: Environmental Research  

E-Print Network [OSTI]

Sustainability of Large Photovoltaic Deployment: Environmental Research Sustainability of Large Photovoltaic Deployment: Environmental ResearchEnvironmental ResearchEnvironmental Research Vasilis Fthenakis and Te from Cadmium Telluride Photovoltaic Manufacturing Scrap, Progress in Photovoltaics: Research

Homes, Christopher C.

475

Grid Connectivity Research, Development & Demonstration Projects  

Broader source: Energy.gov [DOE]

2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

476

Solar Photovoltaic Financing: Residential Sector Deployment ...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Solar Photovoltaic Financing: Residential Sector Deployment Solar Photovoltaic Financing: Residential Sector Deployment This report presents the information that homeowners and...

477

Photovoltaic applications for remote-island needs  

SciTech Connect (OSTI)

Electric power supply options available to many of the central and south Pacific island governments are severely constrained by remoteness, limited infrastructures, a corrosive natural environment, and the high delivered costs of many conventional energy sources. Photovoltaic energy systems offer a currently available, practical, and cost-effective source of electricity for many stand-alone applications in remote areas of the Pacific. Photovoltaic system definitions and cost analyses are provided for selected applications in the Republic of Palau, the Federated States of Micronesia, the Republic of the Marshall Islands, and the Territory of American Samoa.

Schaller, D.A.

1983-01-01T23:59:59.000Z

478

Research Opportunities in Reliability of Photovoltaic Modules (Presentation)  

SciTech Connect (OSTI)

The motivation for an increased scope and a more proactive effort in reliability research of photovoltaic modules and systems includes reducing the levelized cost of energy and gaining better confidence in the energy and financial payback for photovoltaic systems. This increased reliability and confidence will lead to greater penetration of photovoltaics in the energy portfolio and greater employment in photovoltaics and related industries. Present research needs include the fundamental degradation mechanisms of polymers, connectors and other module components, mapping of failure mechanisms observed in the field to those in accelerated lifetime tests, determining the acceleration factors, and improving standards for modules such that tests can appropriately be assigned to evaluate their long term durability. Specific mechanisms discussed are corrosion in module components, metastability in thin-film active layers, delamination and loss of elastic properties in module polymeric materials, and inverter failure. Presently, there is hiring of reliability scientists and engineers at many levels of the value chain for photovoltaics.

Hacke, P.

2010-05-01T23:59:59.000Z

479

Building Energy Software Tools Directory: Photovoltaics Economics  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Photovoltaics Economics Calculator Photovoltaics Economics Calculator Web-based tool which allows you to describe your solar system in detail and provides a detailed breakdown of what sort of power you'll get out of it and how economical of a investment the system will be. It uses the TMY2 solar data from the NREL Renewable Resource Data Center. This calculator allows users to customize their setup, providing greater feedback on how much power is provided when, and most importantly, a detailed economics breakdown of how the investment works out. It also keeps track of battery charge states for off-grid users. Screen Shots Keywords solar, photovoltaic, economics Validation/Testing Validated against PVWatts, a widely recognized solar power output calculator. When given the exact same conditions, power production is

480

Project Profile: Plug-and-Play Solar Photovoltaics for American Homes  

Broader source: Energy.gov [DOE]

Fraunhofer USA, Inc., Center for Sustainable Energy Systems and its partners, under the Plug-and-Play Photovoltaics FOA, are developing technologies, components, systems, and standards that enable...

Note: This page contains sample records for the topic "grid-connected photovoltaic systems" 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

Semiconductor nanowires for photovoltaic and photoelectrochemical energy conversion  

E-Print Network [OSTI]

for Photovoltaic and Photoelectrochemical Energy Conversionas photovoltaic and photoelectrochemical energy conversionblock for solar photovoltaic and photoelectrochemical energy

Dasgupta, Neil

2014-01-01T23:59:59.000Z

482

Thermionic-photovoltaic energy converter  

SciTech Connect (OSTI)

A thermionic-photovoltaic energy conversion device comprises a thermionic diode mounted within a hollow tubular photovoltaic converter. The thermionic diode maintains a cesium discharge for producing excited atoms that emit line radiation in the wavelength region of 850 nm to 890 nm. The photovoltaic converter is a silicon or galium arsenide photovoltaic cell having bandgap energies in this same wavelength region for optimum cell efficiency.

Chubb, D. L.

1985-07-09T23:59:59.000Z

483

Catalog of DC Appliances and Power Systems  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Catalog of DC Appliances and Power Systems Catalog of DC Appliances and Power Systems Title Catalog of DC Appliances and Power Systems Publication Type Report LBNL Report Number LBNL-5364E Year of Publication 2011 Authors Garbesi, Karina, Vagelis Vossos, and Hongxia Shen Document Number LBNL-5364E Date Published October Publisher Lawrence Berkeley National Laboratory Abstract This document catalogs the characteristics of current and potential future direct current (DC) products and power systems. It is part of a larger U.S. Department of Energy-funded project, "Direct-DC Power Systems for Energy Efficiency and Renewable Energy Integration with a Residential and Small Commercial Focus". That project is investigating the energy-savings potential, benefits, and barriers of using DC generated by on-site renewable energy systems directly in its DC form, rather than converting it first to alternating current (AC) for distribution to loads. Two related reports resulted from this work: this Catalog and a companion report that addresses direct-DC energy savings in U.S. residential buildings.Interest in 'direct-DC' is motivated by a combination of factors: the very rapid increase in residential and commercial photovoltaic (PV) power systems in the United States; the rapid expansion in the current and expected future use of energy efficient products that utilize DC power internally; the demonstrated energy savings of direct-DC in commercial data centers; and the current emergence of direct-DC power standards and products designed for grid-connected residential and commercial products. Based on an in-depth study of DC appliances and power systems, we assessed off-grid markets for DC appliances, the DC compatibility of mainstream electricity end-uses, and the emerging mainstream market for direct-DC appliances and power systems.

484

A Multivariate Moving Average Control Chart for Photovoltaic Processes  

E-Print Network [OSTI]

Abstract—For the electrical metrics that describe photovoltaic cell performance are inherently multivariate in nature, use of a univariate, or one variable, statistical process control chart can have important limitations. Development of a comprehensive process control strategy is known to be significantly beneficial to reducing process variability that ultimately drives up the manufacturing cost photovoltaic cells. The multivariate moving average or MMA chart, is applied to the electrical metrics of photovoltaic cells to illustrate the improved sensitivity on process variability this method of control charting offers. The result show the ability of the MMA chart to expand to as any variables as needed, suggests an application with multiple photovoltaic electrical metrics being used in concert to determine the processes state of control. Keywords—The multivariate moving average control chart, Photovoltaic processes control, Multivariate system. I.

Chunchom Pongchavalit

485

Nellis AFB 'Sun Park' Photovoltaic Power Project  

Broader source: Energy.gov (indexed) [DOE]

Briefing is: Briefing is: UNCLASSIFIED Headquarters Air Combat Command Nellis AFB 'Sun Park' Photovoltaic Power Project *Capt Frank Hollifield *AFLOA/JACLULT Overview *Objective * Provide renewable utility service from a Contractor owned Photovoltaic (Solar Power) Array to Nellis AFB electrical distribution system * Successful offeror owns and operates the PV Array for length of lease *Legal Instruments * Nellis AFB enters into an indefinite term utility service contract with successful offeror * May cancel with one year notification * 20 year land lease * Provides land for PV array via a land lease ( land treated as"Gov't furnished equipment" in utility contract) Why PV - Why Nellis * Support renewable energy goals

486

IEEE TRANSACTIONS ON ENERGY CONVERSION, VOL. 29, NO. 4, DECEMBER 2014 957 Decentralized Optimal Dispatch of Photovoltaic  

E-Print Network [OSTI]

Dispatch of Photovoltaic Inverters in Residential Distribution Systems Emiliano Dall'Anese, Member, IEEE photovoltaic (PV) in- verters are developed in this paper. It is known that conventional PV inverter), photovoltaic systems, sparsity, voltage regulation. I. INTRODUCTION THE PROLIFERATION of residential

Giannakis, Georgios

487

PHYSICAL REVIEW B 84, 075144 (2011) Fundamental and excitation gaps in molecules of relevance for organic photovoltaics from an  

E-Print Network [OSTI]

for organic photovoltaics from an optimally tuned range-separated hybrid functional Sivan Refaely-Abramson,1 and optical gaps of relevant molecular systems are of primary importance for organic-based photovoltaics of photovoltaically relevant and other molecular systems. DOI: 10.1103/PhysRevB.84.075144 PACS number(s): 71.15.Mb I

Baer, Roi

488

photovoltaic | OpenEI  

Open Energy Info (EERE)

photovoltaic photovoltaic Dataset Summary Description Global PV grid parity and market potential. Data is courtesy of Sean Ong. Source National Renewable Energy Laboratory Date Released Unknown Date Updated Unknown Keywords grid Parity Payback photovoltaic price PV Residential Data text/csv icon globalgridparity.csv (csv, 4.8 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period License License Creative Commons CCZero Comment Rate this dataset Usefulness of the metadata Average vote Your vote Usefulness of the dataset Average vote Your vote Ease of access Average vote Your vote Overall rating Average vote Your vote Comments Login or register to post comments If you rate this dataset, your published comment will include your rating.

489

Nanowires enabling strained photovoltaics  

SciTech Connect (OSTI)

Photovoltaic nano-devices have largely been relying on charge separation in conventional p-n junctions. Junction formation via doping, however, imposes major challenges in process control. Here, we report on a concept for photovoltaic energy conversion at the nano scale without the need for intentional doping. Our approach relies on charge carrier separation in inhomogeneously strained germanium nanowires (Ge NWs). This concept utilizes the strain-induced gradient in bandgap along tapered NWs. Experimental data confirms the feasibility of strain-induced charge separation in individual vapor-liquid-solid grown Ge NW devices with an internal quantum efficiency of ?5%. The charge separation mechanism, though, is not inherently limited to a distinct material. Our work establishes a class of photovoltaic nano-devices with its opto-electronic properties engineered by size, shape, and applied strain.

Greil, J.; Bertagnolli, E.; Lugstein, A., E-mail: alois.lugstein@tuwien.ac.at [Institute of Solid State Electronics, Vienna University of Technology, Floragasse 7, 1040 Vienna (Austria); Birner, S. [nextnano GmbH, Südmährenstr. 21, 85586 Poing (Germany)

2014-04-21T23:59:59.000Z

490

Enhanced Thin Film Organic Photovoltaic Devices  

Energy Innovation Portal (Marketing Summaries) [EERE]

A novel structure design for thin film organic photovoltaic (OPV) devices provides a system for increasing the optical absorption in the active layer. The waveguided structure permits reduction of the active layer thickness, resulting in enhanced charge collection and extraction, leading to improved power conversion efficiency compared to standard OPV devices....

2014-01-10T23:59:59.000Z

491

Techno-economic analysis of a small size short range EES (electric energy storage) system for a PV (photovoltaic) plant serving a SME (small and medium enterprise) in a given regulatory context  

Science Journals Connector (OSTI)

Abstract Considering the case of small-medium size plants based on PV (photovoltaic), an analysis was developed in order to model, simulate and optimize an electricity storage system to be coupled to a small photovoltaic plant applied to an industry load, to calculate its profitability in a given regulatory context. The case study is the current Italian electricity market. The analysis was done on a small industrial plant in the area of Torino (North-West Italy), with its own photovoltaic plant connected to the public electrical grid. After an analysis of the present situation, the aim of the analysis is to understand the behaviour, from an economic point of view, of the self-consumption of renewable energy in case of a sudden deregulation of the market (switch off of feed in tariffs or RES (renewable energy system) kWh). The study includes a sensitivity analysis of the main technical and economic parameters in order to identify which of them have the greatest influence on economic performance, and therefore which parameters have to be considered with special care by the producers (technical and economic parameters) and the regulatory authorities (regulations) to decide and optimize the adoption of storage systems as a way to sustain the massive introduction of RES in the energy arena.

R. Scozzari; M. Santarelli

2014-01-01T23:59:59.000Z

492

Modesto Irrigation District - Photovoltaic Rebate Program | Department of  

Broader source: Energy.gov (indexed) [DOE]

Modesto Irrigation District - Photovoltaic Rebate Program Modesto Irrigation District - Photovoltaic Rebate Program Modesto Irrigation District - Photovoltaic Rebate Program < Back Eligibility Agricultural Commercial Local Government Nonprofit Residential State Government Savings Category Solar Buying & Making Electricity Maximum Rebate 50% of total project costs. Program Info State California Program Type Utility Rebate Program Rebate Amount Systems >1 kW to 30 kW: $1.00/W AC. Systems >30 kW to 1 MW: performance-based incentive of $0.10/kWh for 5 years. Provider PV Program Coordinator Modesto Irrigation District offers a photovoltaic rebate program for all of their electric customers. The peak output capacity of a system must be 1 kW or greater to participate. Systems up to 30 kilowatts (kW) in capacity can

493

Development of a Design Tool for Building Integrated Photovoltaics  

Science Journals Connector (OSTI)

Abstract: This paper outlines the design objectives, approach and results of the development of a building integrated photovoltaic (BIPV) system visualisation prototype design tool which was coded in Visual Basic for Applications. It provides the designer ...

2001-07-01T23:59:59.000Z

494

Use of Heat From, and Thermal Management of, Photovoltaics  

Science Journals Connector (OSTI)

In flat plate PV/T collectors air or water are used for heat removal. Heat removal from concentrated photovoltaic systems has been accomplished using fluids such as air and water (Royne et al. 2003; Saki et al. 1...

Brian Norton

2014-01-01T23:59:59.000Z

495

Multiple gap photovoltaic device  

DOE Patents [OSTI]

A multiple gap photovoltaic device having a transparent electrical contact adjacent a first cell which in turn is adjacent a second cell on an opaque electrical contact, includes utilizing an amorphous semiconductor as the first cell and a crystalline semiconductor as the second cell.

Dalal, Vikram L. (Newark, DE)

1981-01-01T23:59:59.000Z

496

Thin film photovoltaic cell  

DOE Patents [OSTI]

A thin film photovoltaic cell having a transparent electrical contact and an opaque electrical contact with a pair of semiconductors therebetween includes utilizing one of the electrical contacts as a substrate and wherein the inner surface thereof is modified by microroughening while being macro-planar.

Meakin, John D. (Newark, DE); Bragagnolo, Julio (Newark, DE)

1982-01-01T23:59:59.000Z

497

Nanostructures in photovoltaics  

Science Journals Connector (OSTI)

...reducing carbon dioxide emissions is solar photovoltaics, which uses sunlight...electricity needs from an array of solar panels of approximately 33km-smaller than...5 years. Since the early silicon solar cells in the 1950s, which had efficiencies...

2006-01-01T23:59:59.000Z

498

Solar Cells and Photovoltaics  

Science Journals Connector (OSTI)

...The most common method for producing a-Si:H for photovoltaics is by plasma-enhanced CVD from SiH4 mixtures. The films are deposited onto a textured conducting oxide such as indium–tin oxide (ITO) which provide...

Stuart Irvine Prof.

2007-01-01T23:59:59.000Z

499

Photovoltaics (Fact Sheet)  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) works with industry, academia, national laboratories, and other government agencies to advance solar photovoltaics (PV) domestically. The SunShot Initiative aims to achieve widespread, unsubsidized cost-competitiveness through an applied research and development (R&D) portfolio spanning PV materials, devices, and manufacturing technologies.

Not Available

2012-11-01T23:59:59.000Z

500

Photovoltaic Energy Conversion  

E-Print Network [OSTI]

Photovoltaic Energy Conversion Frank Zimmermann #12;Solar Electricity Generation Consumes no fuel Make solar cells more efficient Theoretical energy conversion efficiency limit of single junction-bandgap photons are not absorbed: Carrier relaxation to band edges: Photon energy exceeding bandgap is lost

Glashausser, Charles