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1

Modified Microgrid Concept for Rural Electrification in Africa | Open  

Open Energy Info (EERE)

Modified Microgrid Concept for Rural Electrification in Africa Modified Microgrid Concept for Rural Electrification in Africa Jump to: navigation, search Tool Summary Name: Modified Microgrid Concept for Rural Electrification in Africa Agency/Company /Organization: IEEE Sector: Energy Focus Area: Grid Assessment and Integration Topics: Co-benefits assessment, - Energy Access Resource Type: Technical report Website: ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1709540 UN Region: Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa Language: English References: Modified Microgrid Concept for Rural Electrification in Africa[1] "With the population of 13.4% of the world and a land area of 15%, Africa has only 2% of the world's industrial capacity. Its per capita income is only 15% of the world average and only consumes 3% of world energy. Many

2

Integration of distributed energy resources. The CERTS Microgrid Concept  

E-Print Network (OSTI)

Energy Resources The CERTS MicroGrid Concept Prepared forTechnology Solutions (CERTS) MicroGrid concept assumes anflexibility allows the CERTS MicroGrid to present itself to

2002-01-01T23:59:59.000Z

3

Validation of the CERTS Microgrid Concept The CEC/CERTS Microgrid Testbed  

E-Print Network (OSTI)

TESTBED S TATUS The CEC/CERTS Microgrid testbed project teambe sought where the CERTS Microgrid concept can be employed.on appropriateness of the CERTS Microgrid for the particular

Nichols, David K.; Stevens, John; Lasseter, Robert H.; Eto, Joseph H.

2006-01-01T23:59:59.000Z

4

Advanced concepts for controlling energy surety microgrids.  

Science Conference Proceedings (OSTI)

Today, researchers, engineers, and policy makers are seeking ways to meet the world's growing demand for energy while addressing critical issues such as energy security, reliability, and sustainability. Many believe that distributed generators operating within a microgrid have the potential to address most of these issues. Sandia National Laboratories has developed a concept called energy surety in which five of these 'surety elements' are simultaneously considered: energy security, reliability, sustainability, safety, and cost-effectiveness. The surety methodology leads to a new microgrid design that we call an energy surety microgrid (ESM). This paper discusses the unique control requirement needed to produce a microgrid system that has high levels of surety, describes the control system from the most fundamental level through a real-world example, and discusses our ideas and concepts for a complete system.

Menicucci, David F.; Ortiz-Moyet, Juan

2011-05-01T23:59:59.000Z

5

Integration of Distributed Energy The CERTS MicroGrid Concept  

E-Print Network (OSTI)

Integration of Distributed Energy Resources The CERTS MicroGrid Concept CALIFORNIA ENERGY Resources The CERTS MicroGrid Concept Prepared for Transmission Reliability Program Office of Power ­ The CERTS MicroGrid Concept ii Table of Contents 1. Introduction...................................................................................................

6

Integration of Distributed Energy The CERTS MicroGrid Concept  

E-Print Network (OSTI)

Integration of Distributed Energy Resources The CERTS MicroGrid Concept CALIFORNIA ENERGY Resources The MicroGrid Concept Appendices Prepared for Transmission Reliability Program Office of Power Program, under Work for Others Contract No. BG 99-39. #12;2 APPENDIX A. MicroGrid Technologies Many small

7

Validation of the CERTS Microgrid Concept The CEC/CERTS MicrogridTestbed  

Science Conference Proceedings (OSTI)

The development of test plans to validate the CERTSMicrogrid concept is discussed, including the status of a testbed.Increased application of Distributed Energy Resources on the Distributionsystem has the potential to improve performance, lower operational costsand create value. Microgrids have the potential to deliver these highvalue benefits. This presentation will focus on operationalcharacteristics of the CERTS microgrid, the partners in the project andthe status of the CEC/CERTS microgrid testbed. Index Terms DistributedGeneration, Distributed Resource, Islanding, Microgrid,Microturbine

Nichols, David K.; Stevens, John; Lasseter, Robert H.; Eto,Joseph H.

2006-06-01T23:59:59.000Z

8

Validation of the CERTS Microgrid Concept The CEC/CERTS Microgrid Testbed  

E-Print Network (OSTI)

the distribution grid, microgrids, control of power systemscosts and create value. Microgrids have the potential to

Nichols, David K.; Stevens, John; Lasseter, Robert H.; Eto, Joseph H.

2006-01-01T23:59:59.000Z

9

Energy manager design for microgrids  

E-Print Network (OSTI)

Protection Issues of the Microgrid Concept. ” CERTS, 2002.and B. J. Kirby. 2003. “Microgrid Energy Management System”Energy Resources: The CERTS MicroGrid Concept” Berkeley, CA:

Firestone, Ryan; Marnay, Chris

2005-01-01T23:59:59.000Z

10

Integration of distributed energy resources. The CERTS Microgrid Concept  

E-Print Network (OSTI)

Systems-Interconnected MicroGrids - Power Parks 4. M i c r o5. Control Methods for MicroGrids 5.1 Microsource Control6. Protective Relaying and MicroGrids 6.1 Events Occurring

2002-01-01T23:59:59.000Z

11

Abstract Microgrids are a new concept for future energy dis-tribution systems that enable renewable energy integration and  

E-Print Network (OSTI)

1 Abstract ­ Microgrids are a new concept for future energy dis- tribution systems that enable renewable energy integration and improved energy management capability. Microgrids consist of multiple power quality and power distribution reliability, microgrids need to operate in both grid

Collins, Emmanuel

12

Abstract--The concept of microgrid hierarchical control is presented recently. In this paper, a hierarchical scheme is  

E-Print Network (OSTI)

1 1 Abstract-- The concept of microgrid hierarchical control is presented recently. In this paper) in an islanded microgrid. Unbalance compensation is achieved by sending proper control signals to the DGs local unbalance. Index Terms--Distributed generator (DG), hierarchical control, microgrid, secondary control

Vasquez, Juan Carlos

13

Analysis of electric vehicle interconnection with commercial building microgrids  

E-Print Network (OSTI)

Outline global concept of microgrid and electric vehicle (services to a building microgrid produces technology neutral

Stadler, Michael

2011-01-01T23:59:59.000Z

14

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

Line Diagram of CERTS Microgrid Test Bed Figure 3. TecogenRoy, N. Lewis. 2008. CERTS Microgrid Laboratory Test Bed. (Energy Resources: The MicroGrid Concept. (Lawrence Berkeley

ETO, J.

2010-01-01T23:59:59.000Z

15

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

on Power Delivery CERTS Microgrid Laboratory Test Bed R. H.and J. Roy Abstract--. CERTS Microgrid concept captures theas a subsystem or a “microgrid”. The sources can operate in

Lasseter, R. H.

2010-01-01T23:59:59.000Z

16

CERTS Microgrid Laboratory Test Bed - PIER Final Project Report  

E-Print Network (OSTI)

Control and Design of Microgrid Components. January. 257R.H. 2007. “CERTS Microgrid. ” International Conference onValidation of the CERTS Microgrid Concept: The CEC/CERTS

Eto, Joseph H.

2008-01-01T23:59:59.000Z

17

Optimal Technology Selection and Operation of Microgrids in Commercial Buildings  

E-Print Network (OSTI)

Energy Resources: The CERTS MicroGrid Concept,” LBNL- 50829,the adoption of added microgrid capabilities as well asto allow widespread microgrid introduction. The potential

Marnay, Chris; Venkataramanan, Giri; Stadler, Michael; Siddiqui, Afzal; Firestone, Ryan; Chandran, Bala

2008-01-01T23:59:59.000Z

18

Integration of distributed energy resources. The CERTS Microgrid Concept  

DOE Green Energy (OSTI)

Evolutionary changes in the regulatory and operational climate of traditional electric utilities and the emergence of smaller generating systems such as microturbines have opened new opportunities for on-site power generation by electricity users. In this context, distributed energy resources (DER)--small power generators typically located at users' sites where the energy (both electric and thermal) they generate is used--have emerged as a promising option to meet growing customer needs for electric power with an emphasis on reliability and power quality. The portfolio of DER includes generators, energy storage, load control, and, for certain classes of systems, advanced power electronic interfaces between the generators and the bulk power provider. This white paper proposes that the significant potential of smaller DER to meet customers' and utilities' needs can be best captured by organizing these resources into MicroGrids.

Lasseter, Robert; Akhil, Abbas; Marnay, Chris; Stephens, John; Dagle, Jeff; Guttromsom, Ross; Meliopoulous, A. Sakis; Yinger, Robert; Eto, Joe

2002-04-01T23:59:59.000Z

19

Microgrids and Heterogeneous Power Quality and Reliability  

E-Print Network (OSTI)

Resources: The CERTS MicroGrid Concept”, LBNL-50829, (2002).by reference to two ongoing microgrid tests in the U.S. andmacrogrid. In this paper, a microgrid is a local cluster of

Marnay, Chris

2008-01-01T23:59:59.000Z

20

A Framework for the Evaluation of the Cost and Benefits of Microgrids  

E-Print Network (OSTI)

and O. Bailey, "The CERTS Microgrid and the Future of theet al. , "The CERTS Microgrid Concept," Sacramento, CA, CECvalue of reliability to a microgrid: Simulations of three

Morris, Greg Young

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Effects of a carbon tax on microgrid combined heat and power adoption  

E-Print Network (OSTI)

Resources: The CERTS MicroGrid Concept. ” Berkeley Lab1. Energy Characteristics of Microgrid’s Individual MembersEffects of a Carbon Tax on Microgrid Combined Heat and Power

Siddiqui, Afzal S.; Marnay, Chris; Edwards, Jennifer L.; Firestone, Ryan M.; Ghosh, Srijay; Stadler, Michael

2004-01-01T23:59:59.000Z

22

Generation Scheduling in Microgrids under Uncertainties in Power Generation.  

E-Print Network (OSTI)

??Recently, the concept of Microgrids (MG) has been introduced in the distribution network. Microgrids are defined as small power systems that consist of various distributed… (more)

Zein Alabedin, Ayman

2012-01-01T23:59:59.000Z

23

Microgrids and Heterogeneous Security, Quality, Reliability, and Availability  

E-Print Network (OSTI)

organized and attended many microgrid events, Hiroshi Asano,Energy Resources: The CERTS MicroGrid Concept,” LBNL-50829,by reference to two ongoing microgrid tests in the U.S. and

Marnay, Chris

2007-01-01T23:59:59.000Z

24

Facility Microgrids  

Science Conference Proceedings (OSTI)

Microgrids are receiving a considerable interest from the power industry, partly because their business and technical structure shows promise as a means of taking full advantage of distributed generation. This report investigates three issues associated with facility microgrids: (1) Multiple-distributed generation facility microgrids' unintentional islanding protection, (2) Facility microgrids' response to bulk grid disturbances, and (3) Facility microgrids' intentional islanding.

Ye, Z.; Walling, R.; Miller, N.; Du, P.; Nelson, K.

2005-05-01T23:59:59.000Z

25

The implications of carbon taxation on microgrid adoption of small-scale on-site power generation using a multi-criteria approach  

E-Print Network (OSTI)

of Carbon Taxation on Microgrid Adoption of Small-Scale On-1 Microgridopen market. iv Introduction Microgrid Concept The analysis

Siddiqui, Afzal S.; de Almeida, Anibal T.; Marnay, Chris; Rubio, F. Javier

2002-01-01T23:59:59.000Z

26

Shape of the microgrid  

E-Print Network (OSTI)

distinction between microgrids and our familiar arrangementsagreements between microgrids. Fundamentally, theclustered with loads in microgrids that are designed, built,

Marnay, Chris; Rubio, F. Javier; Siddiqui, Afzal S.

2000-01-01T23:59:59.000Z

27

Value and Technology Assessment to Enhance the Business Case for the CERTS Microgrid  

E-Print Network (OSTI)

and J. Eto, “The CERTS Microgrid Concept,” White paper forR.H. , P. Piagi, “Microgrid: A Conceptual Solution,” PESC’04for Special Application in a Microgrid,” IEEE PES General

Lasseter, Robert

2010-01-01T23:59:59.000Z

28

Effects of a carbon tax on combined heat and power adoption by a microgrid  

E-Print Network (OSTI)

Energy Resources: The CERTS MicroGrid Concept. Berkeley Laband Power Adoption by a Microgrid Chris Marnay, Jennifer L.and Power Adoption by a Microgrid Chris Marnay ? , Jennifer

Marnay, Chris; Edwards, Jennifer L.; Firestone, Ryan M.; Ghosh, Srijay; Siddidqui, Afzal S.; Stadler, Michael

2002-01-01T23:59:59.000Z

29

Added Value of Reliability to a Microgrid: Simulations of Three California Buildings  

E-Print Network (OSTI)

Resources: The CERTS MicroGrid Concept,” Berkeley Lab,Safety Analysis of a Microgrid,”, Int. J. of DistributedValue of Reliability to a Microgrid: Simulations of Three

Marnay, Chris

2009-01-01T23:59:59.000Z

30

CERTS Microgrid Laboratory Test Bed  

Science Conference Proceedings (OSTI)

The objective of the CERTS Microgrid Test Bed project was to enhance the ease of integrating energy sources into a microgrid. The project accomplished this objective by developing and demonstrating three advanced techniques, collectively referred to as the CERTS Microgrid concept, that significantly reduce the level of custom field engineering needed to operate microgrids consisting of generating sources less than 100kW. The techniques comprising the CERTS Microgrid concept are: 1) a method for effecting automatic and seamless transitions between grid-connected and islanded modes of operation, islanding the microgrid's load from a disturbance, thereby maintaining a higher level of service, without impacting the integrity of the utility's electrical power grid; 2) an approach to electrical protection within a limited source microgrid that does not depend on high fault currents; and 3) a method for microgrid control that achieves voltage and frequency stability under islanded conditions without requiring high-speed communications between sources. These techniques were demonstrated at a full-scale test bed built near Columbus, Ohio and operated by American Electric Power. The testing fully confirmed earlier research that had been conducted initially through analytical simulations, then through laboratory emulations,and finally through factory acceptance testing of individual microgrid components. The islanding and resychronization method met all Institute of Electrical and Electronics Engineers Standard 1547 and power quality requirements. The electrical protection system was able to distinguish between normal and faulted operation. The controls were found to be robust under all conditions, including difficult motor starts and high impedance faults. The results from these tests are expected to lead to additional testing of enhancements to the basic techniques at the test bed to improve the business case for microgrid technologies, as well to field demonstrations involving microgrids that involve one or more of the CERTS Microgrid concepts. Future planned microgrid work involves unattended continuous operation of the microgrid for 30 to 60 days to determine how utility faults impact the operation of the microgrid and to gage the power quality and reliability improvements offered by microgrids.

Eto, Joe; Lasseter, Robert; Schenkman, Ben; Stevens, John; Klapp, Dave; Volkommer, Harry; Linton, Ed; Hurtado, Hector; Roy, Jean

2009-06-18T23:59:59.000Z

31

Building Scale DC Microgrids  

E-Print Network (OSTI)

in likely future adoption patterns of microgrids.chairs the annual Symposium on Microgrids, and is Convenorof the CIGRÉ C6.22 Microgrids Evolution Roadmap Working

Marnay, Chris

2013-01-01T23:59:59.000Z

32

The Implications of Carbon Taxation on Microgrid Adoption of Small-Scale On-Site Power Generation Using  

E-Print Network (OSTI)

LBNL-49309 The Implications of Carbon Taxation on Microgrid Adoption of Small-Scale On-Site Power .................................................................................................................1 1.1 Microgrid Concept

33

Microgrids: An emerging paradigm for meeting building electricity and heat requirements efficiently and with appropriate energy quality  

E-Print Network (OSTI)

Strategies for a Microgrid with Multiple DistributedEnergy Resources: The CERTS Microgrid Concept, CEC, P500-03-role of the µGrid (microgrid) paradigm in revolutionising

Marnay, Chris; Firestone, Ryan

2007-01-01T23:59:59.000Z

34

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Microgrid Fault Protection Based;#12;Microgrid Fault Protection Based on Symmetrical and Differential Current Components Prepared for Public............................................................................................................................. 12 2. AEP CERTS MICROGRID

35

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

needed to operate microgrids consisting of generatingdemonstrations involving microgrids that involve one or moreimprovements offered by microgrids. KEYWORDS Field

Eto, Joe

2009-01-01T23:59:59.000Z

36

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

needed to operate microgrids consisting of generatingdemonstrations involving microgrids that involve one or moreimprovements offered by microgrids. KEYWORDS Field

ETO, J.

2010-01-01T23:59:59.000Z

37

Title: Experimental Platform for Novel Distributed Microgrids Control Solutions  

E-Print Network (OSTI)

Title: Experimental Platform for Novel Distributed Microgrids Control Solutions Principal Investigator: Wenxin Liu Sponsor: U.S. Department of Defense Office of Naval Research Summary: Microgrid can, and can operate autonomously without connecting to power grid. The microgrid concept is a big step toward

Nishiguchi, Michele

38

Hierarchical Control Scheme for Voltage Unbalance Compensation in Islanded Microgrids  

E-Print Network (OSTI)

Hierarchical Control Scheme for Voltage Unbalance Compensation in Islanded Microgrids Mehdi@et.aau.dk Abstract-- The concept of microgrid hierarchical control is presented, recently. In this paper, a hierarchical scheme which includes primary and secondary control levels is proposed for islanded microgrids

Vasquez, Juan Carlos

39

CERTS Microgrid Laboratory Test Bed  

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

CERTS Microgrid Laboratory Test Bed CERTS Microgrid Laboratory Test Bed Title CERTS Microgrid Laboratory Test Bed Publication Type Journal Article LBNL Report Number LBNL-3553E Year of Publication 2011 Authors Lasseter, Robert H., Joseph H. Eto, Ben Schenkman, John Stevens, Harry T. Volkommer, David Klapp, Ed Linton, Hector Hurtado, and Joyashree Roy Journal IEEE Transactions on Power Delivery Volume 26 Start Page 325 Issue 1 Date Published 01/2011 Keywords distributed energy resources (der) Abstract CERTS Microgrid concept captures the emerging potential of distributed generation using a system approach. CERTS views generation and associated loads as a subsystem or a "microgrid". The sources can operate in parallel to the grid or can operate in island, providing UPS services. The system can disconnect from the utility during large events (i.e. faults, voltage collapses), but may also intentionally disconnect when the quality of power from the grid falls below certain standards. CERTS Microgrid concepts were demonstrated at a full-scale test bed built near Columbus, Ohio and operated by American Electric Power. The testing fully confirmed earlier research that had been conducted initially through analytical simulations, then through laboratory emulations, and finally through factory acceptance testing of individual microgrid components. The islanding and resynchronization method met all Institute of Electrical and Electronics Engineers Standard 1547 and power quality requirements. The electrical protection system was able to distinguish between normal and faulted operation. The controls were found to be robust under all conditions, including difficult motor starts and high impedance faults. Keywords: CHP, UPS, distributed generation, intentional islanding, inverters, microgrid, CERTS, power vs. frequency droop, voltage droop.

40

Shape of the microgrid  

Science Conference Proceedings (OSTI)

Restrictions on expansion of traditional centralized generating and delivery systems may be becoming so tight in the industrialized countries that they cannot reasonably be expected meet future electricity demand growth at acceptable cost. Meanwhile, technological advances, notably improved power electronics that permit grid interconnection of asynchronous generation sources, is tilting the economics of power generation back towards smaller scales, thereby reversing a century long trend towards the central control paradigm. Special power quality requirements or opportunities for combined heat and power applications make on-site generation an even more attractive option for customers. The existence of a significant amount of electricity sources dispersed throughout the low voltage distribution system could create a power system quite different to the one we are familiar with and creating it offers significant research and engineering challenges. Moreover, the electrical and economic relationships between customers and the distribution utility and among customers may take forms quite distinct from those we know today. For example, rather than devices being individually interconnected in parallel with the grid, they may be grouped with loads in a semi-autonomous neighborhood that could be termed a microgrid. A microgrid is a cluster of small (by the standards of current power systems, e.g. microgrid concept is the notion of a flexible, yet controllable electronic interface between the microgrid and the familiar wider power system, or macrogrid. This interface essentially isolates the two sides electrically; and yet connects them economically by allowing delivery and receipt of electrical energy and ancillary services (EE&AS) at the interface. From the customer side of the interface, the microgrid should appear as an autonomous power system meeting the power quality and reliability requirements of the customer. Such issues as local voltage, reliability, losses and quality of power should be those that support the customers' objectives. From the macrogrid side, however, the microgrid should appear as a legitimate entity akin to current interconnected generators or loads. A key distinction between microgrids and our familiar arrangements is the expanded role of electricity endusers in determining the pattern of development of the overall power system, which must not only accommodate purchases and sales of EE&AS to and from established markets but also contractual agreements between microgrids. Fundamentally, the characteristics and capabilities of the microgrid will be determined by its internal requirements together with the technical, economic, and regulatory opportunities and constraints it faces, and not by established objectives for capacity expansion and reliability of the macrogrid. The goal of Consortium for Electric Reliability Technology Solutions (CERTS) work underway at the Berkeley Lab is to anticipate possible patterns of microgrid development that can help focus research efforts on the key technical problems that must be solved to enable microgrid deployment.

Marnay, Chris; Rubio, F. Javier; Siddiqui, Afzal S.

2000-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Shape of the microgrid  

SciTech Connect

Restrictions on expansion of traditional centralized generating and delivery systems may be becoming so tight in the industrialized countries that they cannot reasonably be expected meet future electricity demand growth at acceptable cost. Meanwhile, technological advances, notably improved power electronics that permit grid interconnection of asynchronous generation sources, is tilting the economics of power generation back towards smaller scales, thereby reversing a century long trend towards the central control paradigm. Special power quality requirements or opportunities for combined heat and power applications make on-site generation an even more attractive option for customers. The existence of a significant amount of electricity sources dispersed throughout the low voltage distribution system could create a power system quite different to the one we are familiar with and creating it offers significant research and engineering challenges. Moreover, the electrical and economic relationships between customers and the distribution utility and among customers may take forms quite distinct from those we know today. For example, rather than devices being individually interconnected in parallel with the grid, they may be grouped with loads in a semi-autonomous neighborhood that could be termed a microgrid. A microgrid is a cluster of small (by the standards of current power systems, e.g. < 500 kW) sources, storage systems, and loads which presents itself to the grid as a legitimate single entity. The heart of the microgrid concept is the notion of a flexible, yet controllable electronic interface between the microgrid and the familiar wider power system, or macrogrid. This interface essentially isolates the two sides electrically; and yet connects them economically by allowing delivery and receipt of electrical energy and ancillary services (EE&AS) at the interface. From the customer side of the interface, the microgrid should appear as an autonomous power system meeting the power quality and reliability requirements of the customer. Such issues as local voltage, reliability, losses and quality of power should be those that support the customers' objectives. From the macrogrid side, however, the microgrid should appear as a legitimate entity akin to current interconnected generators or loads. A key distinction between microgrids and our familiar arrangements is the expanded role of electricity endusers in determining the pattern of development of the overall power system, which must not only accommodate purchases and sales of EE&AS to and from established markets but also contractual agreements between microgrids. Fundamentally, the characteristics and capabilities of the microgrid will be determined by its internal requirements together with the technical, economic, and regulatory opportunities and constraints it faces, and not by established objectives for capacity expansion and reliability of the macrogrid. The goal of Consortium for Electric Reliability Technology Solutions (CERTS) work underway at the Berkeley Lab is to anticipate possible patterns of microgrid development that can help focus research efforts on the key technical problems that must be solved to enable microgrid deployment.

Marnay, Chris; Rubio, F. Javier; Siddiqui, Afzal S.

2000-11-01T23:59:59.000Z

42

Shape of the microgrid  

E-Print Network (OSTI)

Shape of the Microgrid Chris Marnay, F Javier Rubio, andautonomous neighborhood that could be termed a microgrid.A microgrid is a cluster of small (by the standards of

Marnay, Chris; Rubio, F. Javier; Siddiqui, Afzal S.

2000-01-01T23:59:59.000Z

43

Microgrid cyber security reference architecture.  

SciTech Connect

This document describes a microgrid cyber security reference architecture. First, we present a high-level concept of operations for a microgrid, including operational modes, necessary power actors, and the communication protocols typically employed. We then describe our motivation for designing a secure microgrid; in particular, we provide general network and industrial control system (ICS)-speci c vulnerabilities, a threat model, information assurance compliance concerns, and design criteria for a microgrid control system network. Our design approach addresses these concerns by segmenting the microgrid control system network into enclaves, grouping enclaves into functional domains, and describing actor communication using data exchange attributes. We describe cyber actors that can help mitigate potential vulnerabilities, in addition to performance bene ts and vulnerability mitigation that may be realized using this reference architecture. To illustrate our design approach, we present a notional a microgrid control system network implementation, including types of communica- tion occurring on that network, example data exchange attributes for actors in the network, an example of how the network can be segmented to create enclaves and functional domains, and how cyber actors can be used to enforce network segmentation and provide the neces- sary level of security. Finally, we describe areas of focus for the further development of the reference architecture.

Veitch, Cynthia K.; Henry, Jordan M.; Richardson, Bryan T.; Hart, Derek H.

2013-07-01T23:59:59.000Z

44

Microgrid Testing  

Science Conference Proceedings (OSTI)

With the publication of IEEE 1574.4 Guide for Design, Operation, and Integration of Distributed Resource Island Systems with Electric Power Systems, there is an increasing amount of attention on not only the design and operations of microgrids, but also on the proper operation and testing of these systems. This standard provides alternative approaches and good practices for the design, operation, and integration of microgrids. This includes the ability to separate from and reconnect to part of the utility grid while providing power to the islanded power system. This presentation addresses the industry need to develop standardized testing and evaluation procedures for microgrids in order to assure quality operation in the grid connected and islanded modes of operation.

Shirazi, M.; Kroposki, B.

2012-01-01T23:59:59.000Z

45

Building Scale DC Microgrids  

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

Scale DC Microgrids Title Building Scale DC Microgrids Publication Type Conference Proceedings LBNL Report Number LBNL-5729E Year of Publication 2012 Authors Marnay, Chris, Steven...

46

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Technical Advisory Committee Microgrid Test Bed Project 30 April 2008 Lawrence Berkeley National Laboratory Building 90 Room 4133 1

47

Abstract--The issue of controlled and reliable integration of distributed energy resources into microgrids and large power  

E-Print Network (OSTI)

into microgrids and large power grids has recently gained considerable attention. The microgrid concept, which capabilities. In order to provide uninterruptible power supply to the loads, microgrids are expected to operate. The problem of optimal management of the resources in a microgrid is being widely investigated and recent

Cañizares, Claudio A.

48

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

Autonomous Control of Microgrids,” IEEE PES Meeting,engineering needed to operate microgrids consisting of smallreduction of cost, meshed microgrids and frequency based

Lasseter, R. H.

2010-01-01T23:59:59.000Z

49

Energy manager design for microgrids  

E-Print Network (OSTI)

Energy Manager Design for Microgrids Hillier, F. , and G.Energy Manager Design for Microgrids Appendix A: Smart*DER:Manager Design for Microgrids Prepared for the California

Firestone, Ryan; Marnay, Chris

2005-01-01T23:59:59.000Z

50

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

Diagram of CERTS Microgrid Test Bed Figure 3. Tecogen PrimeCERTS Microgrid Laboratory Test Bed. (California EnergyFigure 1. CERTS Microgrid Test Bed at American Electric

ETO, J.

2010-01-01T23:59:59.000Z

51

CERTS Microgrid Laboratory Test Bed  

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

Submitted to IEEE Transactions on Power Delivery Submitted to IEEE Transactions on Power Delivery Abstract--. CERTS Microgrid concept captures the emerging potential of distributed generation using a system approach. CERTS views generation and associated loads as a subsystem or a "microgrid". The sources can operate in parallel to the grid or can operate in island, providing UPS services. The system can disconnect from the utility during large events (i.e. faults, voltage collapses), but may also intentionally disconnect when the quality of power from the grid falls below certain standards. CERTS Microgrid concepts were demonstrated at a full-scale test bed built near Columbus, Ohio and operated by American Electric Power. The testing fully confirmed earlier research that had been conducted initially through analytical simulations,

52

Adaptive strategy for demosaicing microgrid polarimeter imagery  

Science Conference Proceedings (OSTI)

Microgrid imaging polarimeters consist of a focal plane array sensor with linear polarization filters of differing orientations overlaid at each pixel, similar in concept to the arrangement of spectral filters in a color CCD Bayer pattern camera. However, ...

Bradley M. Ratliff; Charles F. LaCasse; J. Scott Tyo

2011-03-01T23:59:59.000Z

53

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Summary of CERTS Microgrid Static Switch Power Quality Tests at AEP Dolan, CERTS Microgrid Static Switch Testing Prepared For of the information in this report. #12;#12;AEP DTC Proposed Test Plan ­ CERTS Micro-grid Static Switch Project

54

Control of Inverter-Connected Sources in Autonomous Microgrids Ian A. Hiskens Eric M. Fleming  

E-Print Network (OSTI)

Control of Inverter-Connected Sources in Autonomous Microgrids Ian A. Hiskens Eric M. Fleming interconnection strate- gies. The resulting microgrid concept allows sub-networks of sources and loads to maintain to a microgrid, explores controller behaviour. The investigation considers disconnection from the main grid

Hiskens, Ian A.

55

Demand Side Management for Wind Power Integration in Microgrid Using Dynamic Potential Game Theory  

E-Print Network (OSTI)

Demand Side Management for Wind Power Integration in Microgrid Using Dynamic Potential Game Theory the intermittency in wind power generation. Our focus is on an isolated microgrid with one wind turbine, one fast supply and demand in an isolated microgrid [2], which is an important concept for renewable energy

Huang, Jianwei

56

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

, isolating the microgrid's load from the disturbance (and thereby maintaining high level of service) withoutArnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Test Plan Section 6.0 Microgrid Test Bed System Checkout (Static Switch) Prepared For: California Energy Commission Public Interest

57

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

the development of: figure 1. The microgrid laboratory facilities at ISET (source: ISET). Public Grid U=10 k its service territory. A microgrid is under development that again utilizes control- lable primeLBNL-62937 Microgrids: An Overview of Ongoing Research, Development, and Demonstration Projects

58

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Tecogen CHP Modules to the CERTS research program for the AEP Microgrid Test Bed. Tecogen subcontracted with Youtility Inc. (Hudson was bench-tested at Youtility both individually, and in pairs as a simulated microgrid. Rather than

59

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Youtility Factory Test Plan are the final results to demonstrate the capabilities of the microgrid algorithm implemented in the Youtility inverter microgrid system. Also, the data provided in this paper only depicts two-unit series operation

60

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Test Log Prepared For in this report. #12;#12;DTC Registered Procedure - CERTS Microgrid Test Plan Appendix C: TEST LOG Dolan: Assigned Approved by: K. P. Loving Procedure Review Date: 23 Feb. 2008 Appendix C - "CERTS Microgrid Test

Note: This page contains sample records for the topic "modified microgrid concept" 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

NREL: Technology Deployment - Microgrid Design  

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

Microgrid Design Microgrid Design Photo of a microgrid test site at the National Wind Technology Center. NREL designs independent electrical generation and distribution systems called microgrids, which deliver energy that is reliable, economical, and sustainable. NREL experts work with military, government, industry, and other organizations that cannot afford to lose power to develop reliable and cost-effective microgrid systems. Expertise and Knowledge NREL offers microgrid technical expertise and project support that includes engineering, energy analysis and modeling, financial analysis, and energy management. Our comprehensive and innovative approach to microgrid design is called Continuously Optimized Reliable Energy (CORE) Microgrids. The CORE microgrid approach includes advantages such as:

62

PSCAD/EMTDC-Based Modeling and Analysis of a Microgrid with Renewable Energy Sources  

E-Print Network (OSTI)

Microgrid is a relatively new concept which has gained significant attention recently due to the increasing penetration of distributed energy sources. It brings many benefits to the traditional distribution system. Couples of microgrid testbeds in the forms of either hardware facilities or software simulation systems have been developed to study microgrid issues in many institutes throughout the world. In the work presented in this thesis, a microgrid system model in PSCAD/EMTDC was developed. The proposed microgrid system includes fundamental power system component models, two renewable energy source models (wind and solar) and one energy storage source model. Different case studies were conducted. The results from the simulation case studies showed that the proposed microgrid system in PSCAD had satisfactory performance under different scenarios with renewable energy sources. The proposed microgrid system model can be used for further research on microgrid issues.

Chu, Zhengguo

2010-05-01T23:59:59.000Z

63

CERTS Microgrid Laboratory Test Bed - PIER Final Project Report  

Science Conference Proceedings (OSTI)

The objective of the CERTS Microgrid Laboratory Test Bed project was to enhance the ease of integrating small energy sources into a microgrid. The project accomplished this objective by developing and demonstrating three advanced techniques, collectively referred to as the CERTS Microgrid concept, that significantly reduce the level of custom field engineering needed to operate microgrids consisting of small generating sources. The techniques comprising the CERTS Microgrid concept are: 1) a method for effecting automatic and seamless transitions between grid-connected and islanded modes of operation; 2) an approach to electrical protection within the microgrid that does not depend on high fault currents; and 3) a method for microgrid control that achieves voltage and frequency stability under islanded conditions without requiring high-speed communications. The techniques were demonstrated at a full-scale test bed built near Columbus, Ohio and operated by American Electric Power. The testing fully confirmed earlier research that had been conducted initially through analytical simulations, then through laboratory emulations, and finally through factory acceptance testing of individual microgrid components. The islanding and resychronization method met all Institute of Electrical and Electronics Engineers 1547 and power quality requirements. The electrical protections system was able to distinguish between normal and faulted operation. The controls were found to be robust and under all conditions, including difficult motor starts. The results from these test are expected to lead to additional testing of enhancements to the basic techniques at the test bed to improve the business case for microgrid technologies, as well to field demonstrations involving microgrids that involve one or mroe of the CERTS Microgrid concepts.

Eto, Joseph H.; Eto, Joseph H.; Lasseter, Robert; Schenkman, Ben; Klapp, Dave; Linton, Ed; Hurtado, Hector; Roy, Jean; Lewis, Nancy Jo; Stevens, John; Volkommer, Harry

2008-07-25T23:59:59.000Z

64

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

Diagram of CERTS Microgrid Test Bed Figure 3. Tecogen Prime2009 CERTS Microgrid Laboratory Test Bed J. ETO, Lawrenceof the CERTS Microgrid Test Bed project was to enhance the

Eto, Joe

2009-01-01T23:59:59.000Z

65

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

Line Diagram of CERTS Microgrid Test Bed Figure 3. TecogenCALGARY 2009 CERTS Microgrid Laboratory Test Bed J. ETO,The objective of the CERTS Microgrid Test Bed project was to

Eto, Joe

2009-01-01T23:59:59.000Z

66

CERTS Microgrid Laboratory Test Bed  

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

CERTS Microgrid Laboratory Test Bed Title CERTS Microgrid Laboratory Test Bed Publication Type Report Year of Publication 2010 Authors Lasseter, Robert H., Joseph H. Eto, Ben...

67

Multi-Building Microgrids for a Distributed Energy Future in Portugal  

E-Print Network (OSTI)

typical Portuguese services buildings. Volumetric charge (€/demanding HLTH+OFF multi-building RES LODG EDUC HLTH BCif adopting the ICES - multi-building microgrid concept. The

Mendes, Goncalo

2013-01-01T23:59:59.000Z

68

Microgrids and Heterogeneous Power Quality and Reliability  

E-Print Network (OSTI)

ed. : special issue on microgrids, International Journal ofG. Venkataramanan: “Microgrids in the evolving electricitymore background on microgrids, please see the presentations

Marnay, Chris

2008-01-01T23:59:59.000Z

69

Making Microgrids Work  

Science Conference Proceedings (OSTI)

Distributed energy resources including distributed generation and distributed storage are sources of energy located near local loads and can provide a variety of benefits including improved reliability if they are properly operated in the electrical distribution system. Microgrids are systems that have at least one distributed energy resource and associated loads and can form intentional islands in the electrical distribution systems. This paper gives an overview of the microgrid operation. Microgrid testing experiences from different counties was also provided.

Kroposki, B.; Lasseter, R.; Ise, T.; Morozumi, S.; Papathanassiou, S.; Hatziargyriou, N.

2008-05-01T23:59:59.000Z

70

Status of Overseas Microgrid Programs: Microgrid Research Activities  

E-Print Network (OSTI)

LBNL-56E Status of Overseas Microgrid Programs: Microgrid Research Activities in the U.S. (English Berkeley National Laboratory is an equal opportunity employer. #12;1 Microgrid Research Activities in the U.S. Chris Marnay and Nan Zhou 15 November 2007 1. Introduction Research on microgrids in the U.S. has taken

71

International Microgrid Assessment: ...  

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

such as wind and solar, while others can be dispatchable, such as hydropower or biogas. Energy storage is often incorporated into microgrids as a way to deal with...

72

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

LBNL-56E Japanese Status of Overseas Microgrid Programs: Microgrid Research Activities in the U specific commercial product, process, or service by its trade name, trademark, manufacturer, or otherwise Commission, ) DOE CEC PIER(Public Interest Energy Research Program, ) CM CM MW 1 CM PCC

73

Status of Overseas Microgrid Programs: Microgrid Research Activities in the U.S.  

E-Print Network (OSTI)

Introduction Research on microgrids in the U.S. has taken aAutonomous Control of Microgrids,” IEEE Power Engineeringtranslate into a desire for microgrids to seamlessly island

Marnay, Chris

2008-01-01T23:59:59.000Z

74

Building Scale DC Microgrids  

E-Print Network (OSTI)

and Generation," IEEE Smart- Grid Conf. , 978-1-4577-2159-and Op- eration of Smart Grids with Electric Vehiclemore on microgrids and smart grids as well as CHP, as an

Marnay, Chris

2013-01-01T23:59:59.000Z

75

A Green Prison: The Santa Rita Jail Campus Microgrid  

E-Print Network (OSTI)

presented in the Campus Microgrids Panel, 2012 IEEE PESstorage and generation, microgrids, PV, fuel cells, power

Marnay, Chris

2013-01-01T23:59:59.000Z

76

Value and Technology Assessment to Enhance the Business Case for the CERTS Microgrid  

SciTech Connect

The CERTS Microgrid concept is an advanced approach for enabling integration of, in principle, an unlimited quantity of distributed energy resources into the electricity grid. A key feature of a microgrid, is its ability, during a utility grid disturbance, to separate and isolate itself from the utility seamlessly with no disruption to the loads within the microgrid (including no reduction in power quality). Then, when the utility grid returns to normal, the microgrid automatically resynchronizes and reconnects itself to the grid, in an equally seamless fashion. What is unique about the CERTS Microgrid is that it can provide this technically challenging functionality without extensive (i.e., expensive) custom engineering. In addition, the design of the CERTS Microgrid also provides high system reliability and great flexibility in the placement of distributed generation within the microgrid. The CERTS Microgrid offers these functionalities at much lower costs than traditional approaches by incorporating peer-to-peer and plug-and-play concepts for each component within the Microgrid. The predecessor to the current project involved the construction of and completion of initial testing using the world's first, full-scale, inverter-based, distributed generation test bed. The project demonstrated three advanced techniques, collectively referred to as the CERTS Microgrid concept, which collectively significantly reduce the level of custom field engineering needed to operate microgrids consisting of small generating sources. The techniques are: (1) a method for effecting automatic and seamless transitions between grid-connected and islanded modes of operation; (2) an approach to electrical protection within the microgrid that does not depend on high fault currents; and (3) a method for microgrid control that achieves voltage and frequency stability under both grid and islanded conditions without requiring high-speed communications. The work conducted in this phase of RD&D on the CERTS Microgrid Concept builds upon this base of technical accomplishments to prioritize, develop, and then demonstrate technology enhancements to further enhance the business case for microgrids. That is, having demonstrated the technical feasibility of microgrid functions, RD&D optimization efforts are now needed to accelerate commercial deployment. The current phase is a contribution to these efforts. This project involved seven distinct analysis, bench-, and full-scale testing tasks. The first five tasks were described in the original proposal submitted and awarded through DOE's solicitation. Two additional tasks were added to address issues that had been identified in the earlier, first phase of testing.

Lasseter, Robert; Eto, Joe

2010-05-15T23:59:59.000Z

77

Online Energy Generation Scheduling for Microgrids with  

E-Print Network (OSTI)

Online Energy Generation Scheduling for Microgrids with Intermittent Energy Sources and Co entitled: Online Energy Generation Scheduling for Microgrids with Intermittent Energy Sources and Co schedul- ing. However, accurate prediction cannot be guaranteed due to the small scale of microgrids

Zhang, Junshan

78

Microgrid: A Conceptual Solution  

E-Print Network (OSTI)

Abstract — Application of individual distributed generators can cause as many problems as it may solve. A better way to realize the emerging potential of distributed generation is to take a system approach which views generation and associated loads as a subsystem or a “microgrid”. During disturbances, the generation and corresponding loads can separate from the distribution system to isolate the microgrid’s load from the disturbance (providing UPS services) without harming the transmission grid’s integrity. This ability to island generation and loads together has a potential to provide a higher local reliability than that provided by the power system as a whole. In this model it is also critical to be able to use the waste heat by placing the sources near the heat load. This implies that a unit can be placed at any point on the electrical system as required by the location of the heat load.

Robert H. Lasseter; Paolo Piagi

2004-01-01T23:59:59.000Z

79

International Microgrid Assessment: Governance, INcentives, and...  

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

recommendations for a microgrid demonstration program, with specific recommendations for China. This executive summary outlines the drivers for microgrids emphasizing renewable...

80

International Microgrid Assessment: Governance, INcentives, and...  

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

Keywords Energy System Planning & Grid Integration, incentives, microgrid Abstract Microgrids can provide an avenue for increasing the amount of distributed generation and...

Note: This page contains sample records for the topic "modified microgrid concept" 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

Economic and Environmental Optimization of Microgrids  

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

Economic and Environmental Optimization of Microgrids Title Economic and Environmental Optimization of Microgrids Publication Type Presentation Year of Publication 2013 Authors...

82

Webinar Presentation: Energy Storage Solutions for Microgrids...  

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

Webinar Presentation: Energy Storage Solutions for Microgrids (November 2012) Webinar Presentation: Energy Storage Solutions for Microgrids (November 2012) On November 7, 2012,...

83

Lessons Learned from Microgrid Demonstrations Worldwide  

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

Lessons Learned from Microgrid Demonstrations Worldwide Title Lessons Learned from Microgrid Demonstrations Worldwide Publication Type Report LBNL Report Number LBNL-5825E Year of...

84

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

LBNL-55281 The CERTS Microgrid and the Future of the Macrogrid Chris Marnay and Owen C. Bailey contract DE-AC03-76SF00098, and by the California Energy Commission Public Interest Energy Research Program not infringe privately owned rights. Reference herein to any specific commercial product, process, or service

85

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

customers have increasingly sophisticated energy service requirements that require much higher power quality to enhance the distribution system's level of power quality. At the same time, public policies involving for high penetration levels of Extended Microgrid Using (DER) Distributed Energy Resources Robert H

86

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

for publication. Each paper was reviewed externally by at least two leading researchers in the field. The topics; · Storage aspects of DER; · Microgrids; · Economic and operational aspects of DER; · Impact on power quality. DGs will make these systems more like the loop system, thereby providing higher reliability of service

87

CERTS Microgrid Laboratory Test Bed - PIER Final Project Report  

E-Print Network (OSTI)

Microgrids and Distributed Generation. ” Journal of EnergyMicrogrids and Distributed Generation. ” Journal of EnergyMicrogrids and Distributed Generation. ” Journal of Energy

Eto, Joseph H.

2008-01-01T23:59:59.000Z

88

Microgrids in the Evolving Electricity Generation and Delivery Infrastructure  

E-Print Network (OSTI)

N ATIONAL L ABORATORY Microgrids in the Evolving Electricityopportunity employer. Microgrids in the Evolving Electricityembedded with the load in microgrids. Development and decay

Marnay, Chris; Venkataramanan, Giri

2006-01-01T23:59:59.000Z

89

Analysis of electric vehicle interconnection with commercial building microgrids  

E-Print Network (OSTI)

with commercial building microgrids Michael Stadler, Gonçalocommercial building microgrids *) Michael Stadler GonçaloSVOW), http://der.lbl.gov/microgrids-lbnl/current-project-

Stadler, Michael

2011-01-01T23:59:59.000Z

90

CERTS Microgrid Laboratory Test Bed - PIER Final Project Report  

E-Print Network (OSTI)

3 pages. Lasseter, R.H. 2007. “Microgrids and Distributed3 pages. Lasseter, R.H. 2007. “Microgrids and Distributed2006. Autonomous Control of Microgrids. IEEE PES Meeting,

Eto, Joseph H.

2008-01-01T23:59:59.000Z

91

The CERTS microgrid and the future of the macrogrid  

E-Print Network (OSTI)

Energy Manager Design for Microgrids. Berkeley Lab report inunder local control in microgrids are emerging, the CERTSand power systems in microgrids. A description of a specific

Marnay, Chris; Bailey, Owen C.

2004-01-01T23:59:59.000Z

92

Distributed Generation Investment by a Microgrid under Uncertainty  

E-Print Network (OSTI)

H, Iravani R, Marnay C. Microgrids: an overview of ongoingenable the emergence of microgrids, which are energy sourcesparadigm (see [5]). Although microgrids were historically a

Siddiqui, Afzal

2008-01-01T23:59:59.000Z

93

Optimal Technology Selection and Operation of Microgrids in Commercial Buildings  

E-Print Network (OSTI)

more background on microgrids, please see the presentationsthe two Symposiums on Microgrids held at Berkeley, USA ined. , special issue on microgrids, International Journal of

Marnay, Chris; Venkataramanan, Giri; Stadler, Michael; Siddiqui, Afzal; Firestone, Ryan; Chandran, Bala

2008-01-01T23:59:59.000Z

94

Microgrids and Heterogeneous Security, Quality, Reliability, and Availability  

E-Print Network (OSTI)

G. Venkataramanan, “Microgrids in the evolving electricitymore background on microgrids, please see the presentationsthe two Symposiums on Microgrids held at Berkeley, USA in

Marnay, Chris

2007-01-01T23:59:59.000Z

95

Distributed Generation Investment by a Microgrid Under Uncertainty  

E-Print Network (OSTI)

operating strategy of the microgrid is not known in advance,Generation Investment by a Microgrid Under Uncertainty AfzalGeneration Investment by a Microgrid Under Uncertainty Afzal

Siddiqui, Afzal; Marnay, Chris

2006-01-01T23:59:59.000Z

96

A Green Prison: The Santa Rita Jail Campus Microgrid  

E-Print Network (OSTI)

The Santa Rita Jail Campus Microgrid Chris Marnay, NicholasSanta Rita Jail Campus Microgrid Chris Marnay, IEEE Member,NTRODUCTION A large microgrid project is nearing completion

Marnay, Chris

2013-01-01T23:59:59.000Z

97

2012 DOE Microgrid Workshop Summary Report (September 2012) ...  

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

DOE Microgrid Workshop Summary Report (September 2012) 2012 DOE Microgrid Workshop Summary Report (September 2012) The July 30-31, 2012 Microgrid Workshop was presented by the...

98

Microgrids in the Evolving Electricity Generation and Delivery Infrastructure  

E-Print Network (OSTI)

Prior contributions to microgrid research by many colleaguesReliability C. Role of the Microgrid Decisionmaker Finally,decisionmaker in a microgrid offers a powerful opportunity

Marnay, Chris; Venkataramanan, Giri

2006-01-01T23:59:59.000Z

99

Microgrid Dispatch for Macrogrid Peak-Demand Mitigation  

E-Print Network (OSTI)

N ATIONAL L ABORATORY Microgrid Dispatch for Macrogrid Peak-equal opportunity employer. Microgrid Dispatch for Macrogridutility customers, microgrid solutions – the installation of

DeForest, Nicholas

2013-01-01T23:59:59.000Z

100

Distributed Generation Investment by a Microgrid under Uncertainty  

E-Print Network (OSTI)

Effects of carbon tax on microgrid combined heat and powerGeneration Investment by a Microgrid under Uncertainty AfzalGeneration Investment by a Microgrid under Uncertainty Afzal

Siddiqui, Afzal

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Energy manager design for microgrids  

E-Print Network (OSTI)

to a building energy management system already in place to2003. “Microgrid Energy Management System” Oak Ridge, TN:better. The term energy management systems (EMS) is widely

Firestone, Ryan; Marnay, Chris

2005-01-01T23:59:59.000Z

102

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

CERTS Microgrid Laboratory Test Bed R. H. Lasseter, Fellow,play functionality. The tests demonstrated stable behaviorin an autonomous manner. All tests performed as expected and

Lasseter, R. H.

2010-01-01T23:59:59.000Z

103

System and method for controlling microgrid  

DOE Patents (OSTI)

A system for controlling a microgrid includes microgrid assets and a tieline for coupling the microgrid to a bulk grid; and a tieline controller coupled to the tieline. At least one of the microgrid assets comprises a different type of asset than another one of the microgrid assets. The tieline controller is configured for providing tieline control signals to adjust active and reactive power in respective microgrid assets in response to commands from the bulk grid operating entity, microgrid system conditions, bulk grid conditions, or combinations thereof.

Bose, Sumit (Niskayuna, NY); Achilles, Alfredo Sebastian (Bavaria, DE); Liu, Yan (Ballston Lake, NY); Ahmed, Emad Ezzat (Munich, DE); Garces, Luis Jose (Niskayuna, NY)

2011-07-19T23:59:59.000Z

104

Status of Overseas Microgrid Programs: Microgrid Research Activities in the U.S.  

E-Print Network (OSTI)

Microgrid Research Activities in the U.S. Chris Marnay andadditional funding for microgrid demonstrations in 2008 [4].provide a boost to U.S. microgrid research and results of

Marnay, Chris

2008-01-01T23:59:59.000Z

105

Integration & Operation of a Microgrid at Santa Rita Jail  

E-Print Network (OSTI)

Integration & Operation of a Microgrid at Santa Rita JailIntegration & Operation of a Microgrid at Santa Rita JailJail will become a true microgrid, with full CERTS Microgrid

DeForest, Nicholas

2012-01-01T23:59:59.000Z

106

2012 Microgrid Workshop Report  

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

and Energy Reliability Smart Grid R&D Program Summary Report: 2012 DOE Microgrid Workshop July 30-31, 2012 Chicago, Illinois 2012 DOE Microgrid Workshop Report Page i Acknowledgment The U.S. Department of Energy (DOE) would like to acknowledge the support provided by the organizations represented on the workshop planning committee in developing the workshop process and sessions. The preparation of this workshop report was coordinated by Energy & Environmental Resources Group, LLC (E2RG). The report content is based on the workshop session discussions, with session summary descriptions taken from the report-out presentations by individual teams during the closing plenary. Contributions to this report by all workshop participants, via expressed viewpoints during the

107

Why Two Grids Can Be Better Than One -How the CERTS Microgrid Evolved  

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

Why Two Grids Can Be Better Than One -How the CERTS Microgrid Why Two Grids Can Be Better Than One -How the CERTS Microgrid Evolved from Concept to Practice Why Two Grids Can Be Better Than One -How the CERTS Microgrid Evolved from Concept to Practice Congress, concerned about the reliability of national electricity transmission, turned to the U.S. Department of Energy (DOE) for guidance in the late 1990s. What started as a conversation about maximizing distributed generation to relieve stress on an overtaxed grid has evolved into on-the-ground applications. Proponents envision limitless industrial and commercial applications. Why Two Grids Can Be Better Than One -How the CERTS Microgrid Evolved from Concept to Practice More Documents & Publications Electricity Advisory Committee Meeting Presentations October 2011 -

108

Microgrid Feasibility Study Report  

Science Conference Proceedings (OSTI)

Many electricity customers in rural areas in the northeastern part of the United States have been experiencing power outages lasting ten hours and longer, which far exceeds the Customer Average Interruption Duration Index target of approximately two hours.One possible solution would be to operate these remote communities as a microgrid when the power supply line is out of service. The utility contracted with the Electric Power Research Institute (EPRI) to conduct a feasibility study to ...

2013-12-19T23:59:59.000Z

109

Distributed Generation Investment by a Microgrid Under Uncertainty  

E-Print Network (OSTI)

power grid by involving microgrids, which are localisedPepermans et al. , 2005). Microgrids utilising small-scale,

Siddiqui, Afzal; Marnay, Chris

2006-01-01T23:59:59.000Z

110

Statistical analysis of solar irradiation in a distributed microgrid  

E-Print Network (OSTI)

irradiation in a distributed microgrid A Thesis submitted inin a distributed microgrid by James Patrick Harper Master of

Harper, James Patrick

2010-01-01T23:59:59.000Z

111

Modified blame-based noise reduction for concept drift  

Science Conference Proceedings (OSTI)

Competence enhancement plays an important role in case-base editing. Traditional competence enhancement methods tend to omit the evolving nature of a case-based learner, but take the whole case-base as a static training set. This may seriously delay ... Keywords: case-base editing, case-base maintenance, case-based reasoning, competence enhancement, concept drift

Ning Lu; Guangquan Zhang; Jie Lu

2012-02-01T23:59:59.000Z

112

Definition: Microgrids | Open Energy Information  

Open Energy Info (EERE)

Microgrids Microgrids Jump to: navigation, search Dictionary.png Microgrids A microgrid is an electrical system that includes multiple loads and distributed energy resources that can be operated in parallel with the broader utility grid or as an electrical island.[1] View on Wikipedia Wikipedia Definition View on Reegle Reegle Definition No reegle definition available, No reegle definition available., Distributed generation, also called on-site generation, dispersed generation, embedded generation, decentralized generation, decentralized energy or distributed energy, generates electricity from many small energy sources. Currently, industrial countries generate most of their electricity in large centralized facilities, such as fossil fuel nuclear or hydropower plants. These plants have excellent economies of scale, but usually

113

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

1. CERTS Microgrid Test Bed at American Electric Power PhotoCredit: American Electric Power Figure 2. One-Line DiagramVOLKOMMER, American Electric Power, USA E. LINTON AND HECTOR

Eto, Joe

2009-01-01T23:59:59.000Z

114

Impact of load type on microgrid stability  

E-Print Network (OSTI)

Microgrids show great promise as a means of integrating distributed generation sources into the public grid distribution system. In order to provide uninterrupted,high quality power to local loads, microgrids must have the ...

Monnin, Jared P

2012-01-01T23:59:59.000Z

115

Dynamics and challenges of microgrids implementation  

E-Print Network (OSTI)

Microgrids have the capability of operating on an island mode as well as an integrated mode with the smart grid, depending on the requirement and objectives. Recently, microgrids projects have gained popularity both in ...

Sabhlok, Vikalp Pal

2013-01-01T23:59:59.000Z

116

Microgrid Selection and Operation for Commercial  

E-Print Network (OSTI)

LBNL-313E Microgrid Selection and Operation for Commercial Buildings in California and New York---GGGrrriiiddd CCCooonnnfffeeerrreeennnccceee,,, GGGlllyyyfffaaadddaaa,,, GGGrrreeeeeeccceee,,, 222999­­­333000 MMMaaayyy 222000000888 Microgrid

117

Using advanced measurement systems for microgrid protection  

Science Conference Proceedings (OSTI)

Microgrids have been proposed as a way to integrate distributed renewable energy sources while increasing energy supply reliability to the customers. Microgrids can operate either connected to the grid or islanded. Each mode of operation has very different ...

S. S. Venkata; E. Sortomme

2012-01-01T23:59:59.000Z

118

Energy Security: Microgrid Planning and Design (Presentation)  

Science Conference Proceedings (OSTI)

Energy Security: Microgrid Planning and Design presentation to be given at the 2012 WREF in Denver, CO.

Giraldez, J.

2012-05-01T23:59:59.000Z

119

Information Technology Solutions Energy Surety Microgrid  

communities, emergency response, etc. in utilizing renewable energy sources when traditional sources fail or are inadequate. Energy Surety Microgrid

120

Microgrids: distributed on-site generation  

E-Print Network (OSTI)

Microgrids: distributed on-site generation Suleiman Abu-Sharkh, Rachel Li, Tom Markvart, Neil Ross for Climate Change Research Technical Report 22 #12;1 Microgrids: distributed on-site generation Tyndall production by small scale generators in close proximity to the energy users, integrated into microgrids

Watson, Andrew

Note: This page contains sample records for the topic "modified microgrid concept" 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
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121

Multiagent Coordination in Microgrids via Wireless Networks  

E-Print Network (OSTI)

Multiagent Coordination in Microgrids via Wireless Networks Hao Liang, BBCR Group, University of Waterloo Abstract The future smart grid is expected to be an integration of intelligent microgrids featured to facilitate pervasive microgrid monitoring and control at a high flexibility and low deployment cost. In order

Zhuang, Weihua

122

Diploma Thesis Distributed Secondary Control in Microgrids  

E-Print Network (OSTI)

Diploma Thesis Distributed Secondary Control in Microgrids Hedi Bouattour May 10, 2013 Betreuer. Dr.-Ing. Frank Allgöwer #12;#12;Contents 1 Introduction 1 1.1 Microgrids and Control in AC networks . . . . . . . . . . . . . . . 8 2.5 Droop-Controlled Microgrid

Bullo, Francesco

123

The Added Economic and Environmental Value of Solar Thermal Systems in Microgrids with Combined Heat and Power  

E-Print Network (OSTI)

HVAC, Controls, 2008 Microgrid Symposiums. Held at Berkeley,and annual energy costs, a microgrid’s distributed energyadoption. INTRODUCTION A microgrid is defined as a cluster

Marnay, Chris

2010-01-01T23:59:59.000Z

124

Microgrid Dispatch for Macrogrid Peak-Demand Mitigation  

E-Print Network (OSTI)

electricity. The benefits of microgrids are however a two-customer-operated microgrids can potentially reduce theIf the utility expects microgrids like SRJ to engage in this

DeForest, Nicholas

2013-01-01T23:59:59.000Z

125

The CERTS microgrid and the future of the macrogrid  

E-Print Network (OSTI)

of a Laboratory-Scale Microgrid Phase 2: Operationand Control Two-Inverter Microgrid. N R E L Report No. SR-and S.D. Labinov. 2002. Microgrid Energy Management System.

Marnay, Chris; Bailey, Owen C.

2004-01-01T23:59:59.000Z

126

Electric Grid State Estimators for Distribution Systems with Microgrids  

E-Print Network (OSTI)

Electric Grid State Estimators for Distribution Systems with Microgrids Jing Huang, Vijay Gupta to identify the correct topology. Simulation studies with microgrid induced changes are presented, forecasting- aided state estimation, unscented Kalman filter, recursive Bayesian estimation, microgrid 1

Gupta, Vijay

127

Microgrid Fault Protection Based on Symmetrical and Differential Current Components  

E-Print Network (OSTI)

Microgrid Fault Protection Based on Symmetrical and Differential Current Components Prepared.........................................................................................8 2. AEP CERTS MICROGRID .........................................................................9 ........................................................................67 #12;3 Index of Figures Figure 1: Schematic representation of the AEP CERTS microgrid

128

The Fuzzy Description Logic ALCFH with Hedge Algebras as Concept Modifiers  

E-Print Network (OSTI)

we present the fuzzy description logic ALCF H introduced, where primitive concepts are modified by means of hedges taken from hedge al- gebras. ALCF H is strictly more expressive than Fuzzy-ALC defined procedure for the unsatisfiability problem in ALCF H , and discuss knowledge base expansion when using

Hoelldobler, Steffen

129

A load shedding scheme for inverter based microgrids.  

E-Print Network (OSTI)

??Over the last decade, penetration of microgrids containing distributed generation (DG) sources has increased in grid distribution systems. This requires the stable operation of microgrids… (more)

Ojeda, Alejandro P

2011-01-01T23:59:59.000Z

130

Web-Based Economic and Environmental Optimization of Microgrids  

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

Web-Based Economic and Environmental Optimization of Microgrids Title Web-Based Economic and Environmental Optimization of Microgrids Publication Type Conference Paper LBNL Report...

131

DOD/NREL Model Integrates Vehicles, Renewables & Microgrid (Fact...  

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

locations for systems connecting electric vehicles with solar energy sources and microgrids. A microgrid that integrates renewable generation and vehicle energy storage offers...

132

Multi-building microgrids for a distributed energy future in...  

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

Multi-building microgrids for a distributed energy future in Portugal Title Multi-building microgrids for a distributed energy future in Portugal Publication Type Conference...

133

CERTS Microgrid Laboratory Test Bed - PIER Final Project Report  

E-Print Network (OSTI)

Laboratory Test Bed. California Energy Commission, PublicCERTS Microgrid”, California Energy Commission R&D Forum, 4CERTS Microgrid”, California Energy Commission R&D Forum, 4

Eto, Joseph H.

2008-01-01T23:59:59.000Z

134

A Green Prison: The Santa Rita Jail Campus Microgrid  

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

A Green Prison: The Santa Rita Jail Campus Microgrid Title A Green Prison: The Santa Rita Jail Campus Microgrid Publication Type Report Year of Publication 2012 Authors Marnay,...

135

Energy manager design for microgrids  

Science Conference Proceedings (OSTI)

On-site energy production, known as distributed energy resources (DER), offers consumers many benefits, such as bill savings and predictability, improved system efficiency, improved reliability, control over power quality, and in many cases, greener electricity. Additionally, DER systems can benefit electric utilities by reducing congestion on the grid, reducing the need for new generation and transmission capacity, and offering ancillary services such as voltage support and emergency demand response. Local aggregations of distributed energy resources (DER) that may include active control of on-site end-use energy devices can be called microgrids. Microgrids require control to ensure safe operation and to make dispatch decisions that achieve system objectives such as cost minimization, reliability, efficiency and emissions requirements, while abiding by system constraints and regulatory rules. This control is performed by an energy manager (EM). Preferably, an EM will achieve operation reasonably close to the attainable optimum, it will do this by means robust to deviations from expected conditions, and it will not itself incur insupportable capital or operation and maintenance costs. Also, microgrids can include supervision over end-uses, such as curtailing or rescheduling certain loads. By viewing a unified microgrid as a system of supply and demand, rather than simply a system of on-site generation devices, the benefits of integrated supply and demand control can be exploited, such as economic savings and improved system energy efficiency.

Firestone, Ryan; Marnay, Chris

2005-01-01T23:59:59.000Z

136

Multi-Building Microgrids for a Distributed Energy Future in Portugal  

E-Print Network (OSTI)

effective adoption of microgrid capabilities, which meansthat all results include microgrid capabilities, such asbreakdown occurs. to microgrid system, whether it is in

Mendes, Goncalo

2013-01-01T23:59:59.000Z

137

Added Value of Reliability to a Microgrid: Simulations of Three California Buildings  

E-Print Network (OSTI)

G. Venkataramanan, “Microgrids in the Evolving ElectricityCanada, 2006. Marnay, C. “Microgrids and Heterogeneous Powerutility customers. Such microgrids are a local clusters of

Marnay, Chris

2009-01-01T23:59:59.000Z

138

A Framework for the Evaluation of the Cost and Benefits of Microgrids  

E-Print Network (OSTI)

Iravani, and C. Marnay, "Microgrids," IEEE Power and EnergyA procedure for evaluating microgrids technical and economicand G. Strbac, "Can microgrids provide a new paradigm for

Morris, Greg Young

2012-01-01T23:59:59.000Z

139

Multi-Building Microgrids for a Distributed Energy Future in Portugal  

E-Print Network (OSTI)

None of the dual-typologies microgrids has purchased switch2010, Special Issue on Microgrids and Energy Management,ABORATORY Multi-Building Microgrids for a Distributed Energy

Mendes, Goncalo

2013-01-01T23:59:59.000Z

140

Value and Technology Assessment to Enhance the Business Case for the CERTS Microgrid  

E-Print Network (OSTI)

Autonomous Control of Microgrids,” IEEE PES Meeting,the business case for microgrids. DOE and the Californiaengineering needed to operate microgrids consisting of small

Lasseter, Robert

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Effects of a carbon tax on microgrid combined heat and power adoption  

E-Print Network (OSTI)

Application of MicroGrids” Power System Engineering ResearchLasseter 2002). These microgrids will operate according toauthority. By contrast microgrids will develop in accordance

Siddiqui, Afzal S.; Marnay, Chris; Edwards, Jennifer L.; Firestone, Ryan M.; Ghosh, Srijay; Stadler, Michael

2004-01-01T23:59:59.000Z

142

Assessment of the Economic Potential of Microgrids for Reactive Power Supply  

E-Print Network (OSTI)

of Commercial Building Microgrids,” IEEE Transactions onEconomic Potential of Microgrids for Reactive Power Supplyof creating an incentive for microgrids to provide reactive

Appen, Jan von

2012-01-01T23:59:59.000Z

143

Value and Technology Assessment to Enhance the Business Case for the CERTS Microgrid  

E-Print Network (OSTI)

from each microgrid generation source. In theory this wouldfrom each microgrid generation source. In theory this wouldup to conventional generation sources within a microgrid to

Lasseter, Robert

2010-01-01T23:59:59.000Z

144

Assessment of the Economic Potential of Microgrids for Reactive Power Supply  

E-Print Network (OSTI)

Group, October 2010. [7] Microgrid Symposiums, Berkeley (compensation ranges from a microgrid cost perspective forsystem wide impacts of microgrid participation in reactive

Appen, Jan von

2012-01-01T23:59:59.000Z

145

Impact of load type on microgrid stability.  

E-Print Network (OSTI)

??Microgrids show great promise as a means of integrating distributed generation sources into the public grid distribution system. In order to provide uninterrupted,high quality power… (more)

Monnin, Jared P

2012-01-01T23:59:59.000Z

146

Advanced Islanded-Mode Control of Microgrids.  

E-Print Network (OSTI)

??This thesis is focused on modeling, control, stability, and power management of electronically-interfaced distributed energy resource (DER) units for microgrids. Voltage amplitude and frequency regulation… (more)

Delghavi, Mohammad Bagher

2011-01-01T23:59:59.000Z

147

On the benefits and costs of microgrids.  

E-Print Network (OSTI)

??This thesis examines the benefits that Microgrids can provide to a variety of stakeholders and considers their costs. A flexible framework is proposed in which… (more)

Weyrich Morris, Gregory

2013-01-01T23:59:59.000Z

148

Definition: Microgrid Controller | Open Energy Information  

Open Energy Info (EERE)

electrical system to maintain acceptable frequency and voltage.1 Related Terms microgrids, distributed energy resource References https:www.smartgrid.govcategory...

149

Energy Surety Microgrid™ - Energy Innovation Portal  

The Energy Surety Microgrid™ (ESM) is a Risk Assessment Methodology (RAM) which is a vulnerability assessment for the critical power delivery functions and needs of ...

150

A review of DC micro-grid protection  

Science Conference Proceedings (OSTI)

In this paper, an overview of DC micro-grid is described, which includes the status of DC micro-grid protection and its future development. The paper presents the key techniques of DC micro-grid protection. So far, standards, guidelines and techniques ... Keywords: DC micro-grid, protection, protective devices, structures, technological gaps

Yuhong Xie, Jia Ning, Yanquan Huang, Junbo Jia, Zhihui Jian

2013-06-01T23:59:59.000Z

151

Control and Power Management of Converter Fed Microgrids  

E-Print Network (OSTI)

1 Control and Power Management of Converter Fed Microgrids Charles K. Sao, Member, IEEE, and Peter in parallel in a VSC fed microgrid. Each current controlled VSC in such a microgrid has its own VPD/FQB controller that sets its current references to regulate the voltage and frequency of a common microgrid bus

Lehn, Peter W.

152

Communication technologies for BCIT Smart Microgrid  

Science Conference Proceedings (OSTI)

This paper conducts a topical review of the requirements for end-to-end communication systems as the backbone for command and control within Smart Microgrids. The initial lab and field test results from the evaluation of WiMAX and ZigBee as BCIT Microgrid ...

Giuseppe Stanciulescu; Hassan Farhangi; Ali Palizban; Nikola Stanchev

2012-01-01T23:59:59.000Z

153

Effects of a carbon tax on combined heat and power adoption by a microgrid  

E-Print Network (OSTI)

Application of MicroGrids. Power System Engineering Researchand consumed locally within microgrids (µGrids) that are

Marnay, Chris; Edwards, Jennifer L.; Firestone, Ryan M.; Ghosh, Srijay; Siddidqui, Afzal S.; Stadler, Michael

2002-01-01T23:59:59.000Z

154

The added economic and environmental value of plug-in electric vehicles connected to commercial building microgrids  

E-Print Network (OSTI)

N. et al. , (2007), “Microgrids, An Overview of Ongoingto commercial building microgrids Michael Stadler, Ilanto commercial building microgrids 1 Michael Stadler a,b) ,

Stadler, Michael

2010-01-01T23:59:59.000Z

155

The added economic and environmental value of plug-in electric vehicles connected to commercial building microgrids  

E-Print Network (OSTI)

due to EVs. REFERENCES Microgrid Symposiums. Held atStorage and Reliability on Microgrid Viability: A Study ofCO 2 ) emissions, a microgrid/distributed-energy-resources (

Stadler, Michael

2010-01-01T23:59:59.000Z

156

Microgrid Lab at the Hangzhou Dianzi University  

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

Microgrid Lab at the Hangzhou Dianzi University Speaker(s): Jianmin Zhang Qianzhi Zhang Date: August 6, 2012 - 4:00pm Location: 90-3122 Seminar HostPoint of Contact: Chris Marnay...

157

Smart Energy Management and Control for Fuel Cell Based Micro-Grid Connected Neighborhoods  

DOE Green Energy (OSTI)

Fuel cell power generation promises to be an efficient, pollution-free, reliable power source in both large scale and small scale, remote applications. DOE formed the Solid State Energy Conversion Alliance with the intention of breaking one of the last barriers remaining for cost effective fuel cell power generation. The Alliance’s goal is to produce a core solid-state fuel cell module at a cost of no more than $400 per kilowatt and ready for commercial application by 2010. With their inherently high, 60-70% conversion efficiencies, significantly reduced carbon dioxide emissions, and negligible emissions of other pollutants, fuel cells will be the obvious choice for a broad variety of commercial and residential applications when their cost effectiveness is improved. In a research program funded by the Department of Energy, the research team has been investigating smart fuel cell-operated residential micro-grid communities. This research has focused on using smart control systems in conjunction with fuel cell power plants, with the goal to reduce energy consumption, reduce demand peaks and still meet the energy requirements of any household in a micro-grid community environment. In Phases I and II, a SEMaC was developed and extended to a micro-grid community. In addition, an optimal configuration was determined for a single fuel cell power plant supplying power to a ten-home micro-grid community. In Phase III, the plan is to expand this work to fuel cell based micro-grid connected neighborhoods (mini-grid). The economic implications of hydrogen cogeneration will be investigated. These efforts are consistent with DOE’s mission to decentralize domestic electric power generation and to accelerate the onset of the hydrogen economy. A major challenge facing the routine implementation and use of a fuel cell based mini-grid is the varying electrical demand of the individual micro-grids, and, therefore, analyzing these issues is vital. Efforts are needed to determine the most appropriate means of implementing micro-grids and the costs and processes involved with their extended operation. With the development and availability of fuel cell based stand-alone power plants, an electrical mini-grid, encompassing several connected residential neighborhoods, has become a viable concept. A primary objective of this project is to define the parameters of an economically efficient fuel cell based mini-grid. Since pure hydrogen is not economically available in sufficient quantities at the present time, the use of reforming technology to produce and store excess hydrogen will also be investigated. From a broader perspective, the factors that bear upon the feasibility of fuel cell based micro-grid connected neighborhoods are similar to those pertaining to the electrification of a small town with a localized power generating station containing several conventional generating units. In the conventional case, the town or locality would also be connected to the larger grid system of the utility company. Therefore, in the case of the fuel cell based micro-grid connected neighborhoods, this option should also be available. The objectives of this research project are: To demonstrate that smart energy management of a fuel cell based micro-grid connected neighborhood can be efficient and cost-effective;To define the most economical micro-grid configuration; and, To determine how residential micro-grid connected fuel cell(s) can contribute to America's hydrogen energy future.

Dr. Mohammad S. Alam

2006-03-15T23:59:59.000Z

158

Microgrid Workshop Report August 2011 | Department of Energy  

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

Microgrid Workshop Report August 2011 Microgrid Workshop Report August 2011 Microgrid Workshop Report August 2011 The U.S. Department of Energy (DOE) Office of Electricity Delivery and Energy Reliability (OE) held the Microgrid Workshop on August 30-31, 2011, in San Diego, California. The purpose of the workshop was to convene experts and practitioners to assist the DOE in identifying and prioritizing research and development (R&D) areas in the field of microgrids. The targets of the OE microgrid initiative are to develop commercial scale microgrid systems capable of reducing outage time of required loads by >98% while reducing emissions by >20% and improving system energy efficiencies by >20%, by 2020. Microgrid Workshop Report August 2011.pdf More Documents & Publications

159

Introduction to the model-free control of microgrids  

E-Print Network (OSTI)

This letter presents the application of the model-free control approach to the microgrid control. We show in simulation that the method allows to control, with a simple controller, voltage, current and power of inverter-based microgrids.

Michel, Loïc

2011-01-01T23:59:59.000Z

160

A load shedding scheme for inverter based microgrids  

E-Print Network (OSTI)

Over the last decade, penetration of microgrids containing distributed generation (DG) sources has increased in grid distribution systems. This requires the stable operation of microgrids when connected to the distribution ...

Ojeda, Alejandro P

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Impact of PV forecasts uncertainty in batteries management in microgrids  

E-Print Network (OSTI)

Impact of PV forecasts uncertainty in batteries management in microgrids Andrea Michiorri Arthur-based battery schedule optimisation in microgrids in presence of network constraints. We examine a specific case

Recanati, Catherine

162

Cooperative Energy Network Optimization for Distributed Microgrids: Game Theoretic Approach  

E-Print Network (OSTI)

Cooperative Energy Network Optimization for Distributed Microgrids: Game Theoretic Approach Y. Wasa. 1 5) 6, 7) 8) 6, 9) 10) 7) Receding Horizon Fig. 1: Distributed Microgrids4) 2 2.1 n V := {1

163

DOD/NREL Model Integrates Vehicles, Renewables & Microgrid (Fact Sheet)  

DOE Green Energy (OSTI)

Fact sheet on microgrid model created by the Electric Vehicle Grid Integration program at the Fort Carson Army facility.

Not Available

2011-02-01T23:59:59.000Z

164

Selective compensation of voltage harmonics in grid-connected microgrids  

E-Print Network (OSTI)

1 Selective compensation of voltage harmonics in grid-connected microgrids Mehdi Savaghebia , Juan is proposed for selective compensation of main voltage harmonics in a grid- connected microgrid. The aim level. Keywords Distributed Generator (DG); microgrid; grid-connected; voltage harmonics compensation. 1

Vasquez, Juan Carlos

165

Droop-Controlled Inverters in Microgrids are Kuramoto Oscillators  

E-Print Network (OSTI)

Droop-Controlled Inverters in Microgrids are Kuramoto Oscillators John W. Simpson-Porco Florian D and renewable energy, we study the parallel operation of DC/AC inverters in a lossless microgrid. We show; Electric power systems; Load flow solutions; 1. INTRODUCTION Microgrids appear to be the most natural

Bullo, Francesco

166

Microgrids and Heterogeneous Power Quality and Reliability: Matching the  

E-Print Network (OSTI)

LBNL-63524 Microgrids and Heterogeneous Power Quality and Reliability: Matching the Quality under review by the Transactions of the Industry Applications Society of IEE Japan 1 Microgrids of universal homogeneous supply upstream in the grid. Finally, the potential role of microgrids in delivering

167

Secondary Control for Voltage Unbalance Compensation in an Islanded Microgrid  

E-Print Network (OSTI)

Secondary Control for Voltage Unbalance Compensation in an Islanded Microgrid Mehdi Savaghebi1 microgrid. The aim of the proposed control approach is to enhance the voltage quality at the point of common unbalance. Keywords-distributed generation; microgrid; secondary control; voltage unbalance compensation I

Vasquez, Juan Carlos

168

Understanding the Role of Buildings in a Smart Microgrid  

E-Print Network (OSTI)

Understanding the Role of Buildings in a Smart Microgrid Yuvraj Agarwal Computer Science and Engineering UC San Diego La Jolla, CA 92093-0404 gupta@cs.ucsd.edu Abstract--A `smart microgrid' refers ad- justments. At the scale of a small town, a microgrid is connected to the wide-area electrical

Gupta, Rajesh

169

Phase Locked Loop Control of Inverters in a Microgrid  

E-Print Network (OSTI)

Phase Locked Loop Control of Inverters in a Microgrid Matthew Surprenant Dept of ECE University Venkataramanan Dept of ECE University of Wisconsin Madison, WI, USA Abstract--Microgrids are small for inverter-based microsources within a mi- crogrid. The general control philosophy within a microgrid

Hiskens, Ian A.

170

TOWARDS REAL-TIME GENERATION SCHEDULING IN MICROGRIDS WITH  

E-Print Network (OSTI)

TOWARDS REAL-TIME GENERATION SCHEDULING IN MICROGRIDS WITH PERFORMANCE GUARANTEE LIAN LU, JINLONG TU, CHI-KIN CHAU, MINGHUA CHEN, ZHAO XU AND XIAOJUN LIN INTRODUCTION Microgrid is an emerging- generation improves generation efficiency by 2-3x. A key problem in microgrid operations is how to schedule

Zhang, Junshan

171

The Overview of Research on Microgrid Protection Development  

Science Conference Proceedings (OSTI)

In general, the microgrid can operate in both grid-connection mode and islanded mode that challenges the traditional over-current protection scheme in the distribution network. The novel research and development of protection, including both the microgrid ... Keywords: microgrid, distribution network, protecion, automation transformation, controller

Wei Jiang; Zheng-you He; Zhi-qian Bo

2010-10-01T23:59:59.000Z

172

Distributed Generation Investment by a Microgrid Under Uncertainty  

E-Print Network (OSTI)

LBNL-60592 Distributed Generation Investment by a Microgrid Under Uncertainty Afzal Siddiqui'06 1 Distributed Generation Investment by a Microgrid Under Uncertainty Afzal Siddiqui University a California-based microgrid's decision to invest in a distributed generation (DG) unit that operates

173

A Green Prison: The Santa Rita Jail Campus Microgrid  

E-Print Network (OSTI)

A Green Prison: The Santa Rita Jail Campus Microgrid Chris Marnay, Nicholas DeForest, and Judy Lai in the Campus Microgrids Panel, 2012 IEEE PES General Meeting 22-26 Jul 2012, San Diego, CA USA This work storage and generation, microgrids, PV, fuel cells, power quality, power system economics, energy

174

Recommendations for Technologies for Microgrids on the Big Island  

E-Print Network (OSTI)

Recommendations for Technologies for Microgrids on the Big Island Prepared for U.S. Department Island microgrids By Sentech, Inc. Bethesda, Maryland And University of Hawaii Hawaii Natural Energy for technologies to be used in future installation of Big Island microgrids Subtask 2.2 Deliverable #4 Prepared By

175

Distributed Generation Investment by a Microgrid under Uncertainty++++ Afzal Siddiqui  

E-Print Network (OSTI)

1 Distributed Generation Investment by a Microgrid under Uncertainty++++ Afzal Siddiqui University, CA 94720-8163, USA, c_marnay@lbl.gov ABSTRACT. This paper examines a California-based microgrid-term natural gas generation cost is stochastic, we initially assume that the microgrid may purchase electricity

Guillas, Serge

176

DECENTRALIZED CONTROL ARCHITECTURE FOR COUPLING MICROGRIDS INTO DISTRIBUTION NETWORKS 1 Task 1: Coupling Low-Voltage Microgrids into  

E-Print Network (OSTI)

DECENTRALIZED CONTROL ARCHITECTURE FOR COUPLING MICROGRIDS INTO DISTRIBUTION NETWORKS 1 Task 1: Coupling Low-Voltage Microgrids into Mid-Voltage Distribution Systems Zhao Wang, Student Member, IEEE-voltage (LV) microgrids. At the same time, reactive power is dispatched coordinatively so that voltage

Lemmon, Michael

177

Department of Mechanical Engineering Presents: "Towards Optimal Investment, Planning and Control of Microgrids"  

E-Print Network (OSTI)

of Microgrids" Mohsen A. Jafari, Ph.D. Department of Industrial & Systems Engineering Rutgers University Friday on the optimal investment, planning, and control of distributed micro-grids. A micro-grid is characterized by its of microgrids quite challenging problems. From the power grid point of view, microgrids are resource nodes

Keaveny, Tony

178

2012 SG Peer Review - SDE&G Borrego Springs Microgrid - Tom Bialek, SDG&E  

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

Peer Review Meeting Peer Review Meeting SDG&E Borrego Springs Microgrid Demonstration Project Thomas Bialek, PhD, PE Principal Investigator June 8, 2012 December 2008 Borrego Springs Microgrid Demonstration Project Objective Life-cycle Funding ($K) Budget Period 1 FY2008 - FY2010 Budget Period 2 FY2011 - FY2013 Total DOE Funding $1,241 $6,237 $7,477 Technical Scope Conduct a pilot scale "proof-of concept" demonstration of how advanced information- based technologies and distributed energy resources (DER) may increase asset utilization and reliability of the power grid in support of the national agenda. Establish a microgrid demonstration to prove the effectiveness of integrating multiple DER technologies, energy storage, feeder automation system technologies, and outage management

179

2012 DOE Microgrid Workshop Summary Report (September 2012) | Department of  

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

DOE Microgrid Workshop Summary Report (September 2012) DOE Microgrid Workshop Summary Report (September 2012) 2012 DOE Microgrid Workshop Summary Report (September 2012) The July 30-31, 2012 Microgrid Workshop was presented by the Office of Electricity Delivery and Energy Reliability at the Illinois Institute of Technology in Chicago. The workshop was held in response to discussions at the preceding DOE Microgrid Workshop, held in August 2011, which called for sharing lessons learned and best practices for system integration from existing projects in the U.S. (including military microgrids) and internationally. An additional purpose of the workshop was to determine system integration gap areas in meeting the DOE program 2020 targets for microgrids and to define specific R&D activities for the needed, but unmet, functional

180

2012 Microgrid Workshop Summary Released | Department of Energy  

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

2012 Microgrid Workshop Summary Released 2012 Microgrid Workshop Summary Released 2012 Microgrid Workshop Summary Released September 13, 2012 - 2:22pm Addthis The Department of Energy has released the summary report from the July 30-31, 2012 Microgrid Workshop presented by the Office of Electricity Delivery and Energy Reliability at the Illinois Institute of Technology in Chicago. The workshop was held in response to discussions at the preceding DOE Microgrid Workshop, held in August 2011, which called for sharing lessons learned and best practices for system integration from existing projects in the U.S. (including military microgrids) and internationally. In addition, the purpose of the workshop was to determine system integration gap areas in meeting the DOE program 2020 targets for microgrids and to define specific R&D activities for the needed, but unmet,

Note: This page contains sample records for the topic "modified microgrid concept" 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

The CERTS microgrid and the future of the macrogrid  

Science Conference Proceedings (OSTI)

The blackouts of summer 2003 underscored the dependence of western economies on reliable supply of electricity with tight tolerances of quality. While demand for electricity continues to grow, expansion of the traditional electricity supply system is constrained and is unlikely to keep pace with the growing thirst western economies have for electricity. Furthermore, no compelling case has been made that perpetual improvement in the overall power quality and reliability (PQR) delivered is possible or desirable. An alternative path to providing for sensitive loads is to provide for generation close to them. This would alleviate the pressure for endless improvement in grid PQR and might allow the establishment of a sounder economically based level of universal grid service. Providing for loads by means of local power generation is becoming increasingly competitive with central station generation for a number of reasons, four key ones being non-technical constraints on expansion of the grid, improvements in small scale technologies, opportunities for CHP application, and the ubiquitous nature of sensitive loads in advanced economies. Along with these new technologies, concepts for operating them partially under local control in microgrids are emerging, the CERTS Microgrid being one example. It has been demonstrated in simulation, and a laboratory test of a three microturbine system is planned for early 2005, to be followed by a field demonstration. A systemic energy analysis of a southern California naval base building demonstrates a current economic on-site power opportunity.

Marnay, Chris; Bailey, Owen C.

2004-06-01T23:59:59.000Z

182

Microgrid Selection and Operation for Commercial Buildings in California and New York States  

E-Print Network (OSTI)

N ATIONAL L ABORATORY Microgrid Selection and Operation fore 2 9 – 3 0 M a y 2 0 0 8 Microgrid Selection and OperationIn this paper, a microgrid is defined as a cluster of

Marnay, Chris; Environmental Energy Technologies Division

2008-01-01T23:59:59.000Z

183

Sustainable Microgrid for charging electric vehicles from on-road contactless power transfer systems:.  

E-Print Network (OSTI)

??A sustainable microgrid for supplying power to electric vehicles (EVs) is investigated in this thesis. The energy produced by the microgrid would be directly transferred… (more)

Stamati, T.E.

2012-01-01T23:59:59.000Z

184

Presentation to the EAC - Microgrids and DoD Facilities - Jeffrey...  

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

New revenue streams DoD Drivers Economics Energy security Smart Microgrids 6 DoD and Microgrids Must include an interconnected set of loads and generation...

185

Why Two Grids Can Be Better Than One -How the CERTS Microgrid...  

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

& Publications Electricity Advisory Committee Meeting Presentations October 2011 - Microgrids Microgrid Workshop Report August 2011 Comments of the New America Foundation's Open...

186

Sharing renewable energy in smart microgrids  

Science Conference Proceedings (OSTI)

Renewable energy harvested from the environment is an attractive option for providing green energy to homes. Unfortunately, the intermittent nature of renewable energy results in a mismatch between when these sources generate energy and when homes demand ... Keywords: battery, energy sharing, microgrids, renewable energy

Ting Zhu, Zhichuan Huang, Ankur Sharma, Jikui Su, David Irwin, Aditya Mishra, Daniel Menasche, Prashant Shenoy

2013-04-01T23:59:59.000Z

187

Distributed Generation Investment by a Microgrid under  

E-Print Network (OSTI)

for publication. Each paper was reviewed externally by at least two leading researchers in the field. The topics; · Storage aspects of DER; · Microgrids; · Economic and operational aspects of DER; · Impact on power quality. DGs will make these systems more like the loop system, thereby providing higher reliability of service

188

Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States  

E-Print Network (OSTI)

2003. Hatziargyriou, N. et al. , “Microgrids, An Overview ofequipment combination for microgrids at a few promisingthe reliability benefits of microgrids to DER-CAM analysis

Stadler, Michael

2009-01-01T23:59:59.000Z

189

Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States  

E-Print Network (OSTI)

2003. Hatziargyriou, N. et al. , “Microgrids, An Overview ofand Operation of Microgrids in Commercial Buildings”, IEEEequipment combination for microgrids at a few promising

Stadler, Michael

2009-01-01T23:59:59.000Z

190

The implications of carbon taxation on microgrid adoption of small-scale on-site power generation using a multi-criteria approach  

E-Print Network (OSTI)

Application of MicroGrids. ” Power System Engineeringtogether with loads in microgrids (µGrids). These clustersand consumed locally within microgrids (µGrids) that are

Siddiqui, Afzal S.; de Almeida, Anibal T.; Marnay, Chris; Rubio, F. Javier

2002-01-01T23:59:59.000Z

191

Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States  

E-Print Network (OSTI)

Storage Technologies on Microgrid Viability Siddiqui, A.S. ,of Storage Technologies on Microgrid Viability List ofStorage Technologies on Microgrid Viability List of Figures

Stadler, Michael

2009-01-01T23:59:59.000Z

192

Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States  

E-Print Network (OSTI)

of Storage Technologies on Microgrid Viability Figure 41.of Storage Technologies on Microgrid Viability List ofStorage Technologies on Microgrid Viability List of Figures

Stadler, Michael

2009-01-01T23:59:59.000Z

193

Distributed Renewable Energy Generation Impacts on Microgrid Operation and Reliability  

Science Conference Proceedings (OSTI)

Microgrids incorporating distributed generation, and particularly those incorporating renewable energy technologies, have the potential to improve electric power system efficiency and reliability while providing novel benefits to their owners, operators, and the system as a whole. This report focuses on the impact of renewable energy technologies on microgrids and on the larger question of the impact of distributed generation and microgrids on the electric power system.

2002-02-06T23:59:59.000Z

194

Webinar Presentation: Energy Storage Solutions for Microgrids (November  

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

Presentation: Energy Storage Solutions for Microgrids Presentation: Energy Storage Solutions for Microgrids (November 2012) Webinar Presentation: Energy Storage Solutions for Microgrids (November 2012) On November 7, 2012, Clean Energy States Aliance (CESA) hosted a webinar with Connecticut DEEP in conjuction with Sandia National Lab and DOE on State and Federal Energy Storage Technology Partnership (ESTAP). The four guest speakers were Veronica Szczerkowski (CT DEEP), Imre Gyuk (DOE), Matt Lazarewicz (CESA consultant), and Dan Borneo (Sandia). The combined presentations are available below. Webinar Presentation: Energy Storage Solutions for Microgrids (November 2012) More Documents & Publications Energy Storage Systems 2012 Peer Review Presentations - Day 3, Session 1 Fact Sheet: Energy Storage Technology Advancement Partnership (October

195

Effect of Heat and Electricity Storage and Reliability on Microgrid...  

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

goals: to conduct detailed analysis to find the optimal equipment combination for microgrids at a few promising commercial building hosts in the two favorable markets of...

196

Microgrid Research in Japan: An Update on NTT Facilities' Sendai...  

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

and potentially selling back at other times. Three key potential features of microgrids are: 1. its design around total system energy requirements, 2. its provision of...

197

Reliability of islanded microgrids with stochastic generation and prioritized load  

E-Print Network (OSTI)

The potential to improve distribution system reliability is a primary motivation behind the development and deployment of microgrids. Previous studies have illustrated substantial reliability benefits of dispatchable ...

Marden, Mirjana Milosevic

198

Adaptive load control of microgrids with non-dispatchable generation.  

E-Print Network (OSTI)

??Intelligent appliances have a great potential to provide energy storage and load shedding for power grids. Microgrids are simulated with high levels of wind energy… (more)

Brokish, Kevin Martin

2009-01-01T23:59:59.000Z

199

Introduction to Distributed Generation and the CERTS Microgrid  

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

operation of small-scale generators clustered with loads in local groupings called microgrids. Conceptually and in simulation, a electrical engineering system that will allow...

200

Control and Protection of Multi-DER Microgrids.  

E-Print Network (OSTI)

??This dissertation proposes a power management and control strategy for islanded microgrids, which consist of multiple electronically-interfaced distributed energy resource (DER) units, to achieve a… (more)

Etemadi, Amir Hossein

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

title Microgrid Reliability Modeling and Battery Scheduling Using...  

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

article title Microgrid Reliability Modeling and Battery Scheduling Using Stochastic Linear Programming journal Journal of Electric Power Systems Research volume year month pages...

202

NREL: Energy Systems Integration - Increasing the Value of Microgrids...  

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

The agenda and workshop presentations are below. Agenda An Example Commercial True Microgrid: Santa Rita Jail DC - The Power to Change the World: From Data Centers to Whole...

203

Microgrid Dispatch for Macrogrid Peak-Demand Mitigation  

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

Dispatch for Macrogrid Peak-Demand Mitigation Title Microgrid Dispatch for Macrogrid Peak-Demand Mitigation Publication Type Conference Proceedings Refereed Designation Refereed...

204

Microgrid V2G Charging Station Interconnection Testing (Presentation)  

Science Conference Proceedings (OSTI)

This presentation by Mike Simpson of the National Renewable Energy Laboratory (NREL) describes NREL's microgrid vehicle-to-grid charging station interconnection testing.

Simpson, M.

2013-07-01T23:59:59.000Z

205

Real-time State Estimation on Micro-grids Ying Hu, Anthony Kuh, Aleksandar Kavcic  

E-Print Network (OSTI)

transmission and distribution networks which may include HVDC and MVDC, energy storage, microgrids, renewable

Kavcic, Aleksandar

206

IEC61850 based operation, control and management of utility connected microgrid using wireless technology  

Science Conference Proceedings (OSTI)

Communications for monitoring, control and management of microgrid are very important for smart operation. This paper analyzed the information of microgrid for monitoring, control and management purposes and maps them according to power system automation ... Keywords: IEC61850, Wi-Fi, Wi-MAX, distributed energy resources (DERs), microgrid, microgrid communication network (MCN)

Mojaharul Islam; Hong-Hee Lee

2012-07-01T23:59:59.000Z

207

Assessment of the Economic Potential of Microgrids for Reactive Power Supply  

E-Print Network (OSTI)

Assessment of the Economic Potential of Microgrids for Reactive Power Supply Jan von Appen1 , Chris. This paper outlines the economic potential of DERs coordinated in a microgrid to provide reactive power possibilities of creating an incentive for microgrids to provide reactive power. Index Terms ­ microgrids

208

Status of Overseas Microgrid Programs:Microgrid Research Activities in the U.S.  

Science Conference Proceedings (OSTI)

Research on microgrids in the U.S. has taken a somewhat different path than parallel efforts in Japan and Europe, and this distinction is often noted in international research forums. In general, reliability and power quality in North America is poor compared to other developed countries. For example, in the U.S., the average annual expected outage duration is a few hours, whereas in Japan, it is only a few minutes. Power quality problems in the U.S. are both large scale, such as the August 2003 blackout, and local, such as damaging voltage sags. Meeting the increasingly demanding requirements of a modern digital economy would then seem to offer a more daunting challenge for the U.S. than elsewhere, and certainly, concern that the existing power delivery system will prove inadequate for future gourmet requirements has been a motivating driver of U.S. research. This objective tends to translate into a desire for microgrids to seamlessly island when grid power is interrupted or its quality is inadequate, and to (also seamlessly) reconnect when normal service has been restored. In a sense, the microgrid is perceived as acting as an uninterruptible power supply (UPS), and sometimes even as a competitor to existing UPS options. Nonetheless, this difference is often over-stated, and the other threads that motivate microgrid research also exist in the U.S., e.g. the desire to expand renewable generation and the need to increase the efficiency of fossil-fired generation by the useful local application of waste heat in combined heat and power (CHP) systems, Further, over time, the differences are blurring as concerns about climate change increasingly dominate objectives worldwide. This article describes the CERTS Microgrid, which is almost certainly the best known U.S. example, and also briefly mentions some other U.S. microgrid research.

Marnay, Chris; Marnay, Chris; Zhou, Nan

2008-02-01T23:59:59.000Z

209

Microgrids and Heterogeneous Power Quality and Reliability  

Science Conference Proceedings (OSTI)

This paper describes two stylized alternative visions of how the power system might evolve to meet future requirements for the high quality electricity service that modern digital economies demand, a supergrids paradigm and a dispersed paradigm. Some of the economics of the dispersed vision are explored, and perspectives are presented on both the choice of homogeneous universal power quality upstream in the electricity supply chain and on the extremely heterogeneous requirements of end-use loads. It is argued that meeting the demanding requirements of sensitive loads by local provision of high quality power may be more cost effective than increasing the quality of universal homogeneous supply upstream in the legacy grid. Finally, the potential role of microgrids in delivering heterogeneous power quality is demonstrated by reference to two ongoing microgrid tests in the U.S. and Japan.

LaCommare, Kristina; Marnay, Chris

2007-10-01T23:59:59.000Z

210

Renewable Energy Microgrid Testbed at NASA Ames Research  

E-Print Network (OSTI)

Renewable Energy Microgrid Testbed at NASA Ames Research Center Joel Kubby, Dan O'Leary, Zachary #12;Goals · Set-up a unique microgrid test-bed for renewable energy generation, monitoring and storage · Use the facility for testing systems integration, optimization and control of new renewable energy

Lee, Herbie

211

Continuously Optimized Reliable Energy (CORE) Microgrid: Models & Tools (Fact Sheet)  

SciTech Connect

This brochure describes Continuously Optimized Reliable Energy (CORE), a trademarked process NREL employs to produce conceptual microgrid designs. This systems-based process enables designs to be optimized for economic value, energy surety, and sustainability. Capabilities NREL offers in support of microgrid design are explained.

Not Available

2013-07-01T23:59:59.000Z

212

Power flow management of microgrid networks using model predictive control  

Science Conference Proceedings (OSTI)

In this paper, we present a power flow management method for a network of cooperating microgrids within the context of a smart grid by formulating the problem in a model predictive control framework. In order to reliably and economically provide the ... Keywords: Microgrid, Model predictive control, Renewable energy sources, Smart grid, Storage devices

A. Hooshmand; H. A. Malki; J. Mohammadpour

2012-09-01T23:59:59.000Z

213

LBNL-51771 Journal Effects of a Carbon Tax on Microgrid  

E-Print Network (OSTI)

LBNL-56E Japanese Status of Overseas Microgrid Programs: Microgrid Research Activities in the U specific commercial product, process, or service by its trade name, trademark, manufacturer, or otherwise Commission, ) DOE CEC PIER(Public Interest Energy Research Program, ) CM CM MW 1 CM PCC

214

LBNL-56E Japanese Status of Overseas Microgrid Programs  

E-Print Network (OSTI)

LBNL-56E Japanese Status of Overseas Microgrid Programs: Microgrid Research Activities in the U specific commercial product, process, or service by its trade name, trademark, manufacturer, or otherwise Commission, ) DOE CEC PIER(Public Interest Energy Research Program, ) CM CM MW 1 CM PCC

215

SMART FUEL CELL OPERATED RESIDENTIAL MICRO-GRID COMMUNITY  

DOE Green Energy (OSTI)

To build on the work of year one by expanding the smart control algorithm developed to a micro-grid of ten houses; to perform a cost analysis; to evaluate alternate energy sources; to study system reliability; to develop the energy management algorithm, and to perform micro-grid software and hardware simulations.

Dr. Mohammad S. Alam (PI/PD)

2005-04-13T23:59:59.000Z

216

2012 SG Peer Review - Energy Surety, Microgrids - Mike Hightower, SNL  

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

Support of Renewable and Distributed Support of Renewable and Distributed System Integration and Microgrids Mike Hightower Sandia National Laboratories June 7, 2012 December 2008 Support RDSI and Microgrids Objective Life-cycle Funding Summary ($K) FY 09 to FY 11 FY12, authorized FY13, requested Out-year(s) ~$2000K $870K $1000K $1000K Technical Scope To address current shortcomings of power reliability and security, Sandia is investigating advanced microgrid approaches to locate more secure and robust distributed energy generation and storage sources near loads as a way to better manage power generation and to improve overall power reliability and security. Microgrids are equally applicable to military, industrial, and utility distribution applications. Sandia's microgrid research utilizes smart grid

217

Distributed Generation Investment by a Microgrid Under Uncertainty  

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

Distributed Generation Investment by a Microgrid Under Uncertainty Distributed Generation Investment by a Microgrid Under Uncertainty Speaker(s): Afzal Siddiqui Date: July 24, 2006 - 12:00pm Location: 90-3122 This study examines a California-based microgrid's decision to invest in a distributed generation (DG) unit that operates on natural gas. While the long-term natural gas generation cost is stochastc, we initially assume that the microgrid may purchase electricity at a fixed retail rate from its utility. Using the real options approach, we find natural gas generation cost thresholds that trigger DG investment. Furthermore, the consideration of operational flexibility by the microgrid accelerates DG investment, while the option to disconnect entirely from the utility is not attractive. By allowing the electricity price to be stochastic, we next determine an

218

The Added Economic and Environmental Value of Solar Thermal Systems in Microgrids with Combined Heat and Power  

E-Print Network (OSTI)

N. et al. , (2007), “Microgrids, An Overview of OngoingSolar Thermal Systems in Microgrids with Combined Heat andSolar Thermal Systems in Microgrids with Combined Heat and

Marnay, Chris

2010-01-01T23:59:59.000Z

219

Microgrids: An emerging paradigm for meeting building electricity and heat requirements efficiently and with appropriate energy quality  

E-Print Network (OSTI)

Venkataramanan, 2006, Microgrids in the Evolving ElectricityN ATIONAL L ABORATORY Microgrids: An emerging paradigm forFrance, 4-9 June 2007 Microgrids: An emerging paradigm for

Marnay, Chris; Firestone, Ryan

2007-01-01T23:59:59.000Z

220

Validation of the CERTS Microgrid Concept The CEC/CERTS Microgrid Testbed  

E-Print Network (OSTI)

the development of distributed generation (DG) sources withIndex Terms—Distributed Generation, Distributed Resource,

Nichols, David K.; Stevens, John; Lasseter, Robert H.; Eto, Joseph H.

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Validation of the CERTS Microgrid Concept The CEC/CERTS Microgrid Testbed  

E-Print Network (OSTI)

is with the University of Wisconsin – Madison, Madison, Wi,he joined the University of Wisconsin- Madison in 1980. HisTecogen, University of Wisconsin, and Youtility, Inc. The

Nichols, David K.; Stevens, John; Lasseter, Robert H.; Eto, Joseph H.

2006-01-01T23:59:59.000Z

222

Validation of the CERTS Microgrid Concept The CEC/CERTS Microgrid Testbed  

E-Print Network (OSTI)

John Stevens is with Sandia National Laboratories,Northern Power Systems, Sandia National Laboratories,taking his current job with Sandia National Laboratories,

Nichols, David K.; Stevens, John; Lasseter, Robert H.; Eto, Joseph H.

2006-01-01T23:59:59.000Z

223

The Added Economic and Environmental Value of Solar Thermal Systems in Microgrids with Combined Heat and Power  

E-Print Network (OSTI)

Gas-Fired Distributed Energy Resource Characterizations”,Energy Reliability, Distributed Energy Program of the U.S.costs, a microgrid’s distributed energy resources (DER)

Marnay, Chris

2010-01-01T23:59:59.000Z

224

Microsoft Word - Microgrid Notice of Intent.docx  

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

Notice of Intent to Issue Notice of Intent to Issue Funding Opportunity Announcement No.: DE-FOA-0000997 Microgrid Research, Development, and Demonstration The Department of Energy's (DOE) National Energy Technology Laboratory (NETL) intends to issue, on behalf of the DOE Office of Electricity Delivery and Energy Reliability, a Funding Opportunity Announcement (FOA) entitled "Microgrid Research, Development, and Demonstration." The objective of this FOA is to solicit proposals for development and demonstration of commercial-scale microgrid systems having up to 10 megawatts (MW) of aggregated generation capacity. In addition, systems must be proposed that will aid the DOE Microgrid Program with meeting strategic targets by 2020, namely: ï‚· reducing outage time of critical loads by >98% at a cost comparable to non-

225

NREL: Technology Transfer - NREL Designing Microgrid to Back Up USAFA  

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

NREL Designing Microgrid to Back Up USAFA Critical Loads NREL Designing Microgrid to Back Up USAFA Critical Loads January 30, 2013 NREL grid and dispatchable power experts are helping the United States Air Force Academy (USAFA) in Colorado Springs, Colorado, develop a system to maintain power to critical loads when power is unavailable from the local utility. Under an agreement with USAFA and in collaboration with Colorado Springs Utilities, NREL will design a USAFA microgrid using its Continuously Optimized Reliable Energy (CORE) Microgrid Design process. The four-step CORE process evaluates existing reports, gathers data, analyzes designs, and monitors project implementation and installation. The data gathering and preliminary generation design evaluation phases are nearly complete. Generation options identified during the preliminary

226

NREL: Technology Deployment - NREL Designing Microgrid to Back Up USAFA  

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

NREL Designing Microgrid to Back Up USAFA Critical Loads NREL Designing Microgrid to Back Up USAFA Critical Loads January 30, 2013 NREL grid and dispatchable power experts are helping the United States Air Force Academy (USAFA) in Colorado Springs, Colorado, develop a system to maintain power to critical loads when power is unavailable from the local utility. Under an agreement with USAFA and in collaboration with Colorado Springs Utilities, NREL will design a USAFA microgrid using its Continuously Optimized Reliable Energy (CORE) Microgrid Design process. The four-step CORE process evaluates existing reports, gathers data, analyzes designs, and monitors project implementation and installation. The data gathering and preliminary generation design evaluation phases are nearly complete. Generation options identified during the preliminary

227

Effect of Heat and Electricity Storage and Reliability on Microgrid  

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

Effect of Heat and Electricity Storage and Reliability on Microgrid Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States Title Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States Publication Type Report Year of Publication 2009 Authors Stadler, Michael, Chris Marnay, Afzal S. Siddiqui, Judy Lai, Brian Coffey, and Hirohisa Aki Pagination 106 Date Published 03/2006 Publisher LBNL City Berkeley Keywords consortium for electric reliability technology solutions (certs), energy analysis and environmental impacts department Abstract Berkeley Lab has for several years been developing methods for selection of optimal microgrid systems, especially for commercial building applications, and applying these methods in the Distributed Energy Resources Customer Adoption Model (DER-CAM). This project began with 3 major goals:

228

Localizing Micro-grids Research for the SE Asian Region  

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

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

229

Distributed Generation Investment by a Microgrid under Uncertainty  

Science Conference Proceedings (OSTI)

This paper examines a California-based microgrid?s decision to invest in a distributed generation (DG) unit fuelled by natural gas. While the long-term natural gas generation cost is stochastic, we initially assume that the microgrid may purchase electricity at a fixed retail rate from its utility. Using the real options approach, we find a natural gas generation cost threshold that triggers DG investment. Furthermore, the consideration of operational flexibility by the microgrid increases DG investment, while the option to disconnect from the utility is not attractive. By allowing the electricity price to be stochastic, we next determine an investment threshold boundary and find that high electricity price volatility relative to that of natural gas generation cost delays investment while simultaneously increasing the value of the investment. We conclude by using this result to find the implicit option value of the DG unit when two sources of uncertainty exist.

Marnay, Chris; Siddiqui, Afzal; Marnay, Chris

2008-08-11T23:59:59.000Z

230

A Method for CHP System Evaluation & Microgrid Demonstrations...  

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

be presented that show the characteristics of Japanese dispersed power systems and microgrids. Mr. Sakakura is a Ph.D. student at TUAT with a research focus on Energy System...

231

Hardware simulation of diesel generator and microgrid stability  

E-Print Network (OSTI)

Over the last few years, people have begun to depend less on large power plants with extensive distribution systems, and more on local distributed generation sources. A microgrid, a local collection of distributed generators, ...

Zieve, Michael M

2012-01-01T23:59:59.000Z

232

Social SCADA and Demand Response for sustainable isolated microgrids  

Science Conference Proceedings (OSTI)

A critical aspect concerning an effective development of isolated microgrids is economical sustainability. Most of the efforts are related to social responsibility of local productive companies that look for avoiding long term commitments with the community. ...

R. Palma-Behnke; D. Ortiz; L. Reyes; G. Jimenez-Estevez; N. Garrido

2012-01-01T23:59:59.000Z

233

Adaptive load control of microgrids with non-dispatchable generation  

E-Print Network (OSTI)

Intelligent appliances have a great potential to provide energy storage and load shedding for power grids. Microgrids are simulated with high levels of wind energy penetration. Frequency-adaptive intelligent appliances are ...

Brokish, Kevin Martin

2009-01-01T23:59:59.000Z

234

Performance of the Sendai Microgrid During the 2011 Earthquake...  

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

Performance of the Sendai Microgrid During the 2011 Earthquake and Tsunami Speaker(s): Keiichi Hirose Date: March 23, 2012 - 12:00pm Location: 90-3122 Seminar HostPoint of...

235

Cooperative operation and optimal design for islanded microgrid  

Science Conference Proceedings (OSTI)

Considering the operation constraints of main equipments, this paper addresses an optimization design and coordinated operation control strategy for an islanded microgrid including wind generator, photovoltaic, diesel generator and energy storage (Wind-PV-DG-ESS). ...

Chengshan Wang; Mengxuan Liu; Li Guo

2012-01-01T23:59:59.000Z

236

Analysis of electric vehicle interconnection with commercial building microgrids  

Science Conference Proceedings (OSTI)

The outline of this presentation is: (1) global concept of microgrid and electric vehicle (EV) modeling; (2) Lawrence Berkeley National Laboratory's Distributed Energy Resources Customer Adoption Model (DER-CAM); (3) presentation summary - how does the number of EVs connected to the building change with different optimization goals (cost versus CO{sub 2}); (3) ongoing EV modeling for California: the California commercial end-use survey (CEUS) database, objective: 138 different typical building - EV connections and benefits; (4) detailed analysis for healthcare facility: optimal EV connection at a healthcare facility in southern California; and (5) conclusions. Conclusions are: (1) EV Charging/discharging pattern mainly depends on the objective of the building (cost versus CO{sub 2}); (2) performed optimization runs show that stationary batteries are more attractive than mobile storage when putting more focus on CO{sub 2} emissions. Why? Stationary storage is available 24 hours a day for energy management - more effective; (3) stationary storage will be charged by PV, mobile only marginally; (4) results will depend on the considered region and tariff - final work will show the results for 138 different buildings in nine different climate zones and three major utility service territories.

Stadler, Michael; Mendes, Goncalo; Marnay, Chris; M& #233; gel, Olivier; Lai, Judy

2011-04-01T23:59:59.000Z

237

Program on Technology Innovation: The Galvin Electricity Initiative Microgrid Workshop  

Science Conference Proceedings (OSTI)

EPRI organized The Microgrid Workshop and Roundtable for the Galvin Electricity Initiative, held in Chicago, Illinois, June 27-28, 2006. The privately funded initiative's goal is to create the Perfect Power System, one that is trouble free for consumers and not susceptible to failure. The Microgrid Workshop and Roundtable supported that goal by featuring a combination of formal presentations and roundtable discussions in which participants exchanged experiences and collectively developed lists of issues ...

2007-03-30T23:59:59.000Z

238

Economic and Emergency Operations of the Storage System in a Microgrid.  

E-Print Network (OSTI)

?? Storage system is one of the critical components of the microgrid. Storage system has broad applicability in short-term and long-term operations of microgrid. Storage… (more)

Shaghayegh, Bahramirad

2012-01-01T23:59:59.000Z

239

Key findings from the U.S. Department of Energy 2011 microgrid workshop  

Science Conference Proceedings (OSTI)

The U.S. Department of Energy (DOE) convened a microgrid workshop in August 2011. The workshop brought together more than 50 experts and practitioners to develop technical performance and cost targets for the microgrid, as well as technology development ...

Dan T. Ton

2012-01-01T23:59:59.000Z

240

Smart Microgrid Demonstrator Dr. Wei-Jen Lee (wlee@uta.edu) (Funded by DOE)  

E-Print Network (OSTI)

Smart Microgrid Demonstrator Dr. Wei-Jen Lee (wlee@uta.edu) (Funded by DOE) EE www.uta.edu//ee info reliability and efficiency, lower cost of electric power #12;Smart Microgrid Demonstrator Dr. Wei-Jen Lee

Texas at Arlington, University of

Note: This page contains sample records for the topic "modified microgrid concept" 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

On-chip COMA Cache-coherence protocol for Microgrids of Microthreaded Cores  

E-Print Network (OSTI)

On-chip COMA Cache-coherence protocol for Microgrids of Microthreaded Cores Li Zhang Chris Jesshope and the development of a co-simulator to the Microgrid CMP emulator. 1 Introduction It is now widely accepted

Jesshope, Chris

242

Integration of distributed energy resources. The CERTS Microgrid Concept  

E-Print Network (OSTI)

2001. Integration of Distributed Energy Resources - The C Enew Integration of Distributed Energy Resources - The C E Ron Integration of Distributed Energy Resources The CERTS

2002-01-01T23:59:59.000Z

243

Integration of distributed energy resources. The CERTS Microgrid Concept  

E-Print Network (OSTI)

to meet a range o f demands: baseload duty-cycle needs, peakare suitable for the baseload, and generators with the

2002-01-01T23:59:59.000Z

244

Capstone Project-Design and Implementation of a Customer Driven Microgrid Satish J. Ranade and Joydeep Mitra  

E-Print Network (OSTI)

Capstone Project- Design and Implementation of a Customer Driven Microgrid Satish J. Ranade and subsystem designs that ultimately result in the construction and operation of a microgrid. Background: A microgrid customer-driven microgrid consists of small generation sources and storage installed by customers

Johnson, Eric E.

245

Control and Protection of Power Electronics Interfaced Distri-buted Generation Systems in a Customer-Driven Microgrid  

E-Print Network (OSTI)

in a Customer-Driven Microgrid Fang Z. Peng, Yun Wei Li and Leon M. Tolbert Abstract ­ This paper discusses-driven microgrid (CDM). Particularly, the following topics will be addressed: microgrid system configurations); renewable energy source (RES); micro-source; microgrid; customer-driven micro- grid (CDM), power electronics

Tolbert, Leon M.

246

Hybrid Powertrain Optimization for Plug-In Microgrid Power Generation Automated Modeling Laboratory Slide 1 of 28  

E-Print Network (OSTI)

Hybrid Powertrain Optimization for Plug-In Microgrid Power Generation Automated Modeling LaboratoryPlug--InIn MicrogridMicrogrid Power GenerationPower Generation Scott J. MouraScott J. Moura DongsukDongsuk KumKum Hosam Powertrain Optimization for Plug-In Microgrid Power Generation Automated Modeling Laboratory Slide 2 of 28

Krstic, Miroslav

247

Online energy generation scheduling for microgrids with intermittent energy sources and co-generation  

Science Conference Proceedings (OSTI)

Microgrids represent an emerging paradigm of future electric power systems that can utilize both distributed and centralized generations. Two recent trends in microgrids are the integration of local renewable energy sources (such as wind farms) and the ... Keywords: combined heat and power generation, energy generation scheduling, microgrids, online algorithm

Lian Lu; Jinlong Tu; Chi-Kin Chau; Minghua Chen; Xiaojun Lin

2013-06-01T23:59:59.000Z

248

Study on the operation of a low-voltage AC microgrid with multiple distributed generations  

Science Conference Proceedings (OSTI)

This paper aims to study the operation of a grid-connected low-voltage AC microgrid with multiple distributed generations (DGs). First of all, a 400 V low-voltage AC microgrid integrated with a 30 kW microturbine generator, a 13 kW photovoltaic generation ... Keywords: distributed generators, distribution systems, microgrids, steady-state analysis, three-phase power flow

Wei-Tzer Huang

2010-12-01T23:59:59.000Z

249

Microgrid Power Electronic Converters: State of the Art and Future Challenges  

E-Print Network (OSTI)

Microgrid Power Electronic Converters: State of the Art and Future Challenges M. Jamil, B. Hussain converters used in microgrids. The paper focuses primarily on grid connected converters. Different topologies as they are variable in nature. Distributed generators (DG), including renewable sources, within microgrids can help

250

Aalborg Universitet Supervisory Control of an Adaptive-Droop Regulated DC Microgrid with Battery  

E-Print Network (OSTI)

Aalborg Universitet Supervisory Control of an Adaptive-Droop Regulated DC Microgrid with Battery Control of an Adaptive-Droop Regulated DC Microgrid with Battery Management Capability. I E E E, 2013 #12;1 Supervisory Control of an Adaptive-Droop Regulated DC Microgrid with Battery Management

Vasquez, Juan Carlos

251

An Automatic Load Sharing Approach for a DFIG Based Wind Generator in a Microgrid  

E-Print Network (OSTI)

An Automatic Load Sharing Approach for a DFIG Based Wind Generator in a Microgrid M. A. Barik and H.ravishankar@unsw.edu.au Abstract--The aim of this paper is to manage the load variation of a microgrid by controlling the wind by simulating a benchmark microgrid test system. Simulation results show that the proposed control scheme

Pota, Himanshu Roy

252

Design and Verification of Smart and Scalable DC Microgrids for Emerging Regions  

E-Print Network (OSTI)

Design and Verification of Smart and Scalable DC Microgrids for Emerging Regions P. Achintya solutions that displace fossil fuels and are financially viable for developing regions. A novel DC microgrid-testing of the technical and economic viability of the microgrid system are presented. I. INTRODUCTION Millions

Sanders, Seth

253

Synchronization and Power Sharing for Droop-Controlled Inverters in Islanded Microgrids  

E-Print Network (OSTI)

Synchronization and Power Sharing for Droop-Controlled Inverters in Islanded Microgrids John W in an inductive microgrid. We show that a network of loads and DC/AC inverters equipped with power-frequency droop model, distributed control. 1 Introduction A microgrid is a low-voltage electrical network, hetero

Bullo, Francesco

254

Stability, Power Sharing, & Distributed Secondary Control in Droop-Controlled Microgrids  

E-Print Network (OSTI)

Stability, Power Sharing, & Distributed Secondary Control in Droop-Controlled Microgrids John W, Denmark Email: qsh@et.aau.dk Abstract--Motivated by the recent and growing interest in microgrids, we study the operation of droop-controlled DC/AC inverters in an islanded microgrid. We present a necessary

Bullo, Francesco

255

Control of Parallel-Connected Bidirectional AC-DC Converters in Stationary Frame for Microgrid  

E-Print Network (OSTI)

Control of Parallel-Connected Bidirectional AC-DC Converters in Stationary Frame for Microgrid-- With the penetration of renewable energy in modern power system, microgrid has become a popular application worldwide. In this paper, parallel-connected bidirectional converters for AC and DC hybrid microgrid application

Teodorescu, Remus

256

Optimal power flow in microgrids using event-triggered optimization Pu Wan and Michael D. Lemmon  

E-Print Network (OSTI)

Optimal power flow in microgrids using event-triggered optimization Pu Wan and Michael D. Lemmon Abstract-- Microgrids are power generation and distribution systems in which users and generators-triggered distributed optimization algorithm to solve the optimal power flow (OPF) problem in microgrids. Under event

Lemmon, Michael

257

IEEE TRANSACTIONS ON SUSTAINABLE ENERGY (TO APPEAR) 1 Robust Energy Management for Microgrids  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON SUSTAINABLE ENERGY (TO APPEAR) 1 Robust Energy Management for Microgrids to failures, distributed energy management is of paramount importance in smart grids, especially in microgrids for a microgrid with high renewable energy penetration and demand-side management operating in grid-connected mode

Giannakis, Georgios

258

Demo Abstract: Toward Data-driven Demand-Response Optimization in a Campus Microgrid  

E-Print Network (OSTI)

Demo Abstract: Toward Data-driven Demand-Response Optimization in a Campus Microgrid Yogesh Simmhan-driven demand response optimization (DR) in the USC campus microgrid, as part of the Los An- geles Smart Grid consumer in Los Angeles, is serving as a campus microgrid testbed and ex- ploring informatics

Prasanna, Viktor K.

259

Modeling and Simulation of a Microgrid as a Stochastic Hybrid System  

E-Print Network (OSTI)

1 Modeling and Simulation of a Microgrid as a Stochastic Hybrid System Martin Strelec, Karel Macek, Alessandro Abate Abstract--Microgrids (MGs) are small-scale local energy grids. While dedicated to cover and on approximate dynamic programming) for typical challenges in MGs. Index Terms--Microgrids, Stochastic Hybrid

Abate, Alessandro

260

The MicroGrid: Using Online Simulation to Predict Application Performance in Diverse Grid Network Environments  

E-Print Network (OSTI)

The MicroGrid: Using Online Simulation to Predict Application Performance in Diverse Grid Network- croGrid grid online simulator. With the MicroGrid, users, grid researchers, or grid operators can today. Further, the MicroGrid supports direct execution of grid applications unchanged

Chien, Andrew A.

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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

A Framework for the Evaluation of the Cost and Benefits of Microgrids  

E-Print Network (OSTI)

A Framework for the Evaluation of the Cost and Benefits of Microgrids Greg Young Morris1 , Chad, The electric power system of the future - Integrating supergrids and microgrids, Bologna, Italy, 13Morris@gmail.com A Framework for the Evaluation of the Cost and Benefits of Microgrids G YOUNG MORRIS1 , GYoung

262

Pricing Games among Interconnected Microgrids Gaurav S. Kasbekar and Saswati Sarkar  

E-Print Network (OSTI)

1 Pricing Games among Interconnected Microgrids Gaurav S. Kasbekar and Saswati Sarkar Abstract--We consider a scenario with multiple independent microgrids close to each other in a region that are connected to each other and to the central grid (macrogrid). In each time slot, a given microgrid may produce more

Sarkar, Saswati

263

Aalborg Universitet A Distributed Control Strategy for Coordination of an Autonomous LVDC Microgrid  

E-Print Network (OSTI)

Aalborg Universitet A Distributed Control Strategy for Coordination of an Autonomous LVDC Microgrid Strategy for Coordination of an Autonomous LVDC Microgrid Based on Power-Line Signalling. I E E E Control Strategy for Coordination of an Autonomous LVDC Microgrid Based on Power-Line Signalling Tomislav

Vasquez, Juan Carlos

264

DERIREC 22@Microgrid (Smart Grid Project) | Open Energy Information  

Open Energy Info (EERE)

DERIREC 22@Microgrid (Smart Grid Project) DERIREC 22@Microgrid (Smart Grid Project) Jump to: navigation, search Project Name DERIREC 22@Microgrid Country Spain Headquarters Location Barcelona, Spain Coordinates 41.387917°, 2.169919° 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":41.387917,"lon":2.169919,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

265

Distributed Generation Investment by a Microgrid UnderUncertainty  

Science Conference Proceedings (OSTI)

This paper examines a California-based microgrid s decision to invest in a distributed generation (DG) unit that operates on natural gas. While the long-term natural gas generation cost is stochastic, we initially assume that the microgrid may purchase electricity at a fixed retail rate from its utility. Using the real options approach, we find natural gas generating cost thresholds that trigger DG investment. Furthermore, the consideration of operational flexibility by the microgrid accelerates DG investment, while the option to disconnect entirely from the utility is not attractive. By allowing the electricity price to be stochastic, we next determine an investment threshold boundary and find that high electricity price volatility relative to that of natural gas generating cost delays investment while simultaneously increasing the value of the investment. We conclude by using this result to find the implicit option value of the DG unit.

Siddiqui, Afzal; Marnay, Chris

2006-06-16T23:59:59.000Z

266

Microgrids and Heterogeneous Security, Quality, Reliability, andAvailability  

Science Conference Proceedings (OSTI)

This paper describes two stylized alternative visions inpopular currencyof how the power system might evolve to meet futurerequirements for the high quality electricity service that modern digitaleconomies demand, a supergrids paradigm and a dispersed paradigm. Some ofthe economics of the dispersed vision are explored. Economic perspectivesare presented on both the choice of homogeneous universal power qualityupstream in the electricity supply, and also on the extremelyheterogeneous require-ments of end-use loads. Finally, the potential roleof microgrids in delivering heterogeneous power quality is demonstratedby reference to two ongoing microgrid tests in the U.S. andJapan.

Marnay, Chris

2007-01-31T23:59:59.000Z

267

Sharing Renewable Energy in Smart Microgrids , Zhichuan Huang  

E-Print Network (OSTI)

Sharing Renewable Energy in Smart Microgrids Ting Zhu , Zhichuan Huang , Ankur Sharma , Jikui Su § Department of Computer Science, University of Massachusetts Amherst ABSTRACT Renewable energy harvested from nature of renewable energy results in a mismatch between when these sources generate energy and when

Shenoy, Prashant

268

Microgrids, virtual power plants and our distributed energy future  

Science Conference Proceedings (OSTI)

Opportunities for VPPs and microgrids will only increase dramatically with time, as the traditional system of building larger and larger centralized and polluting power plants by utilities charging a regulated rate of return fades. The key questions are: how soon will these new business models thrive - and who will be in the driver's seat? (author)

Asmus, Peter

2010-12-15T23:59:59.000Z

269

Efficient demand assignment in multi-connected microgrids  

Science Conference Proceedings (OSTI)

With the proliferation of distributed generation, an electrical load can be satisfied either by a centralized generator or by local/nearby distributed generators. Given a set of resource demands in a collection of geographically co-located microgrids ... Keywords: switching

Kirill Kogan, Sergey Nikolenko, Srinivasan Keshav, Alejandro Lopez-Ortiz

2013-01-01T23:59:59.000Z

270

A BEP analysis of energy supply for sustainable urban microgrids  

Science Conference Proceedings (OSTI)

The paper shows the use of GIS and other program to identify the technical and economic feasibility of a self-sufficient community in energy supply/demand, through the integration of ICT, intelligent infrastructure (smart grid) and the economic analysis ... Keywords: BEP, BIPV, distributed generation, geographic information systems, microgrids, urban energy consumption

Pasquale Balena; Giovanna Mangialardi; Carmelo Maria Torre

2012-06-01T23:59:59.000Z

271

Added Value of Reliability to a Microgrid: Simulations of Three  

E-Print Network (OSTI)

LBNL-55281 The CERTS Microgrid and the Future of the Macrogrid Chris Marnay and Owen C. Bailey contract DE-AC03-76SF00098, and by the California Energy Commission Public Interest Energy Research Program not infringe privately owned rights. Reference herein to any specific commercial product, process, or service

272

Investigating Plug-in Electric Vehicle Charging Stations in Microgrid  

Science Conference Proceedings (OSTI)

PHEVs/PEVs have received increasing attention because of their low pollution emissions, low energy dependence, and high fuel economy. In the near future, most PHEV/PEV enabled parking decks are expected to be powered by small-scale and onsite distributed ... Keywords: Plug-in Electric Vehicle, Microgrid, Smart Grid

Mengqi Wang; Tao Jin

2012-10-01T23:59:59.000Z

273

Image reconstruction for two-color microgrid polarimetric imagers  

Science Conference Proceedings (OSTI)

A Fourier domain method for reconstructing passive Stokes imagery from a two-color microgrid polarization imager is presented in this paper. This new filter-based technique is designed to avoid aliased spectrum content caused by sampling in a checkerboard ...

Daniel A. LeMaster

2011-03-01T23:59:59.000Z

274

Towards Reliable Smart Microgrid Behavior Using Runtime Model Synthesis  

Science Conference Proceedings (OSTI)

The dominant paradigm of centralized power generation, characterized by heavy transmission losses, is being slowly replaced by the smart micro grid, which promises the proliferation of renewable and distributed energy sources. Micro grid reliability ... Keywords: High Assurance, Model-Driven Development, Model Management, Microgrid, SmartGrid, Runtime Models

Mark Allison; Karl A. Morris; Zhenyu Yang; Peter J. Clarke; Fabio M. Costa

2012-10-01T23:59:59.000Z

275

Multiagent System for Priority-Based Load Shedding in Microgrid  

Science Conference Proceedings (OSTI)

The electricity consumption in the world is constantly increasing, and our lives become more and more dependent on electricity. There are several new paradigms proposed in the field of power grid. In Japan, especially after the Great East Japan Earthquake ... Keywords: Smart Grid, Microgrid, Multiagent System

Takumi Kato, Hideyuki Takahashi, Kazuto Sasai, Yujin Lim, Hak-Man Kim, Gen Kitagata, Tetsuo Kinoshita

2013-07-01T23:59:59.000Z

276

Differential energy based microgrid protection against fault conditions  

Science Conference Proceedings (OSTI)

A differential energy based fault protection in microgrid is presented in this paper. Initially the currents at the respective buses are retrieved and processed through a novel time-frequency transform known as S-transform to generate time-frequency ...

S. R. Samantaray; Geza Joos; I. Kamwa

2012-01-01T23:59:59.000Z

277

Thin?film conducting microgrids as transparent heat mirrors  

Science Conference Proceedings (OSTI)

A new type of transparent heat mirror for solar?energy applications has been fabricated by chemically etching a Sn?doped In2O3 film to form a transparent conducting microgrid. For square openings 2.5 ?m on a side

John C. C. Fan; Frank J. Bachner; R. A. Murphy

1976-01-01T23:59:59.000Z

278

Hierarchical Control and Management of Virtual Microgrids for Vehicle Electrification  

E-Print Network (OSTI)

network. Keywords: Smart Grids, vehicle electrification, microgrids, control, distribution networks of electrical power generation and delivery. A Smart Grid is an intelligent and automated energy grid that renovating distribution networks should be given the priority in implementing Smart Grids. This is because

Zhang, Hongwei

279

Investigation of the Technical and Economic Feasibility of Micro-Grid Based Power Systems  

Science Conference Proceedings (OSTI)

The power industry began as micro-grids, small power systems unconnected to a bulk power system. Today, because of the advent of new distributed resource technologies, better control systems, the need for improved distribution system performance, and various constraints associated with continued expansion of the traditional bulk power system, there is new interest in returning to micro-grid approaches for some applications. The new micro-grids of the 21st century can perform much better than the early 20...

2001-12-12T23:59:59.000Z

280

Data Analysis and Visualization for Electric Microgrids: A Case Study on the FortZED RDSI Microgrid  

Science Conference Proceedings (OSTI)

Electric micro grids generate a significant amount of measurement data by virtue of the constituent distributed smaller capacity assets. Data reduction for performance quantification and visualization techniques for micro grids is presented here. The ... Keywords: Data analysis, data reduction, enhanced situational awareness, GUI, microgrids, peak load reduction, reliability, visualization

Mayank Panwar, Daniel Zimmerle, Siddharth Suryanarayanan

2013-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Control method for multi-microgrid systems in smart grid environment -- Stability, optimization and smart demand participation  

Science Conference Proceedings (OSTI)

This paper presents a control strategy for microgrids in smart grid environment. A hierarchical control strategy is developed to ensure stability and to optimize operation of microgrid. Communication, control and advanced metering infrastructure of smart ...

Mohammadhassan A. Sofla; Roger King

2012-01-01T23:59:59.000Z

282

Value and Technology Assessment to Enhance the Business Case for the CERTS Microgrid  

E-Print Network (OSTI)

placement of distributed generation within the microgrid.inverter-based, distributed generation test bed. The projecttarget markets for distributed generation on the East and

Lasseter, Robert

2010-01-01T23:59:59.000Z

283

Optimizing Load Control For A Residential Microgrid In A Collaborative Environment.  

E-Print Network (OSTI)

??Rosenberger, Jay This research is aimed to develop an analytical model for a Residential Microgrid under a collaborative environment. In order to maximize profit, Collaborative… (more)

Ahmadi, Majid

2013-01-01T23:59:59.000Z

284

Hybrid Microgrid Model based on Solar Photovoltaics with Batteries and Fuel Cells system for intermittent applications.  

E-Print Network (OSTI)

??Microgrids are a subset of the modern power structure; using distributed generation (DG) to supply power to communities rather than vast regions. The reduced scale… (more)

Patterson, Maxx

2013-01-01T23:59:59.000Z

285

An experimental study of frequency droop control in a low-inertia microgrid.  

E-Print Network (OSTI)

??The use of distributed generation in microgrid systems is becoming a popular way to provide a reliable source of electricity to critical loads. Efforts in… (more)

Bollman, Andrew M.

2010-01-01T23:59:59.000Z

286

Optimal Co-Design of Microgrids and Electric Vehicles: Synergies, Simplifications and the Effects of Uncertainty.  

E-Print Network (OSTI)

??The burgeoning electrification of automobiles is causing convergence of the transportation and electrical power systems. This is visible in localized micropower systems, or microgrids, that… (more)

Whitefoot, John W.

2012-01-01T23:59:59.000Z

287

Added Value of Reliability to a Microgrid: Simulations of Three California Buildings  

E-Print Network (OSTI)

Eto, “Integration of Distributed Energy Resources: The CERTSa Microgrid,”, Int. J. of Distributed Energy Resources, vol.International Journal of Distributed Energy Resources, vol

Marnay, Chris

2009-01-01T23:59:59.000Z

288

Multi-Building Microgrids for a Distributed Energy Future in Portugal  

E-Print Network (OSTI)

Gas-Fired Distributed Energy Resource Characterizations”,Energy Reliability, Distributed Energy Program of the U.S.Microgrids for a Distributed Energy Future in Portugal

Mendes, Goncalo

2013-01-01T23:59:59.000Z

289

Wireless Communication for Controlling Microgrids: Co-simulation and Performance Evaluation  

Science Conference Proceedings (OSTI)

A microgrid with wireless communication links for microgrid control has been designed and developed. The complete simulation model has been developed in MatLab SimuLink with seamless integration of the power subsystem and the communication subsystem. Unlike the conventional co-simulators that usually glue two existing simulators together by creating an interface, which has a steep learning curve, the proposed simulator is a compact single-unit model. Detailed modeling of the power subsystem and communication system is presented as well as the microgrid control architecture and strategies. The impact of different communication system performances on microgrid control has been studied and evaluated in the proposed simulator.

Mao, Rukun [ORNL; Xu, Yan [ORNL; Li, Huijuan [ORNL; Li, Husheng [ORNL

2013-01-01T23:59:59.000Z

290

To grate a liquid into tiny droplets by its impact on a hydrophobic microgrid  

Science Conference Proceedings (OSTI)

We report on experiments of drop impacting a hydrophobic microgrid of typical spacing a few tens of micrometers. Above a threshold in impact speed

P. Brunet; F. Lapierre; F. Zoueshtiagh; V. Thomy; A. Merlen

2009-01-01T23:59:59.000Z

291

Panel: Microgrid Research and Field Testing IEEE PES General Meeting, 24-28 June 2007, Tampa, FL 1 In general, a microgrid can operate in both the grid-connected  

E-Print Network (OSTI)

Panel: Microgrid Research and Field Testing IEEE PES General Meeting, 24-28 June 2007, Tampa, FL 1 Abstract In general, a microgrid can operate in both the grid-connected mode and the islanded mode where the microgrid is interfaced to the main power system by a fast semiconductor switch called static switch, (SS

292

Text of article published in IEEE Smart Grid, March 2012. http://smartgrid.ieee.org/march-2012/527-microgrids-an-emerging-technology-to-enhance-power-system-  

E-Print Network (OSTI)

/527-microgrids-an-emerging-technology-to-enhance-power-system- reliability Title: Microgrids: An emerging lies in an emerging paradigm of the electricity grid known as the microgrid. This, in its broader sense that is highly decentralized, i.e., with many microgrids catering to clusters of end-user loads, as #12;opposed

293

New Power Electronics Converter Interfacing a Hybrid Dc/Ac Microgrid M. Alibeik, E. C. dos Santos Jr.  

E-Print Network (OSTI)

New Power Electronics Converter Interfacing a Hybrid Dc/Ac Microgrid M. Alibeik, E. C. dos Santos possible to combine ac and dc subgrids to form the hybrid microgrid. The main advantage of the hybrid microgrid is that it has higher efficiency and lesser power conversion. In this work is proposed a new

Zhou, Yaoqi

294

GE Energy Coupled Microgirid Project -University of Notre Dame -April 7, 2011 Distributive Reactive Control in Coupled Microgrids  

E-Print Network (OSTI)

Reactive Control in Coupled Microgrids Task Objectives and Approach simPower Model of MV Network CERTS Microgrid Models Reactive Control of Voltage Rise Deliverables Schedule Distributed Event-Triggered Control of Coupled Microgrids #12;Task Objectives and Approach Task will develop distributed methods to maximize

Lemmon, Michael

295

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. 30, NO. 6, JULY 2012 1061 Decentralized Economic Dispatch in Microgrids via  

E-Print Network (OSTI)

Economic Dispatch in Microgrids via Heterogeneous Wireless Networks Hao Liang, Student Member, IEEE, Bong) Shen, Fellow, IEEE Abstract--As essential building blocks of the future smart grid, microgrids can output, we present a heterogeneous wireless network architecture for microgrids. Low-cost short- range

Shen, Xuemin "Sherman"

296

Intentional Islanded Operation of Converter Fed Microgrids Charles K. Sao, Student Member, IEEE, and Peter W. Lehn, Member, IEEE  

E-Print Network (OSTI)

1 Intentional Islanded Operation of Converter Fed Microgrids Charles K. Sao, Student Member, IEEE microgrid and proposes a control scheme to regulate its voltage and frequency. The model, which is formulated in an instantaneously synchro- nized reference frame, shows that the microgrid voltage depends

Lehn, Peter W.

297

Voltage Stabilization in Microgrids Using Quadratic Droop Control John W. Simpson-Porco, Florian Dorfler, Francesco Bullo  

E-Print Network (OSTI)

Voltage Stabilization in Microgrids Using Quadratic Droop Control John W. Simpson-Porco, Florian D the operation of DC/AC inverters in an inductive microgrid. We consider the problem of voltage stability correspondence with the solutions of a reduced power flow equation. For the common case of a parallel microgrid

Bullo, Francesco

298

Copyright 2013 IEEE. Reprinted, with permission from: Real-world Performance of a CERTS Microgrid in Manhattan  

E-Print Network (OSTI)

Copyright © 2013 IEEE. Reprinted, with permission from: Real-world Performance of a CERTS Microgrid to Special Section on Microgrids for Sustainable Energy: IEEE Transactions on Sustainable Energy microgrid technology enabled the Brevoort, a 1950's era luxury co-op tower in Greenwich Village, NY

299

Further Results on Distributed Secondary Control in Microgrids Hedi Bouattour, John W. Simpson-Porco, Florian Dorfler, and Francesco Bullo  

E-Print Network (OSTI)

Further Results on Distributed Secondary Control in Microgrids Hedi Bouattour, John W. Simpson for primary droop control and secondary control in inductive microgrids. Building on our recent work, we study the problem of set point design in primary-controlled microgrids, and provide a choice of droop coefficients

Bullo, Francesco

300

Micro-Grids for Colonias (TX)  

Science Conference Proceedings (OSTI)

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

Dean Schneider; Michael Martin; Renee Berry; Charles Moyer

2012-07-31T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Prospects for Microgrids in the Republic of South Africa  

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

Prospects for Microgrids in the Republic of South Africa Prospects for Microgrids in the Republic of South Africa Speaker(s): S.P. Chowdhury Sunetra Chowdhury Date: October 12, 2011 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Chris Marnay The South African utility Eskom is the main key player for the energy business in South Africa. Eskom owns the electricity networks and most of the electricity generation, transmission and distribution leading to monopolistic energy market in the country. The South African economy is quite strong in the African Continent and the energy demand has been growing very fast in the country. Most of the current energy mix is coming from coal fired thermal power stations in addition with a small fraction from nuclear as well as open cycle gas turbine and a bit of hydro power.

302

Introduction to Distributed Generation and the CERTS Microgrid  

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

Introduction to Distributed Generation and the CERTS Microgrid Introduction to Distributed Generation and the CERTS Microgrid Speaker(s): Chris Marnay Date: December 3, 2002 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Kristina LaCommare This is a first in a series of at least 5 seminars around the winter break to survey Distributed Energy Resources (DER) research questions and various Berkeley capabilities available to address them. The electricity industry in industrialized countries may be about to reverse a century long trend towards ever larger scale, ever more centrally controlled power systems. The emergence of technologies that are competitive at small scales, close to loads, in large part because of the opportunities created to capture waste heat and locally control power quality might signal a radical

303

Microgrids and Heterogeneous Security, Quality, Reliability, and Availability  

E-Print Network (OSTI)

Abstract--This paper describes two stylized alternative visions in popular currency of how the power system might evolve to meet future requirements for the high quality electricity service that modern digital economies demand, a supergrids paradigm and a dispersed paradigm. Some of the economics of the dispersed vision are explored. Economic perspectives are presented on both the choice of homogeneous universal power quality upstream in the electricity supply, and also on the extremely heterogeneous requirements of end-use loads. Finally, the potential role of microgrids in delivering heterogeneous power quality is demonstrated by reference to two ongoing microgrid tests in the U.S. and Japan. • Index Terms--cogeneration, dispersed storage and generation, power quality, power system economics I.

C. Marnay

2007-01-01T23:59:59.000Z

304

Distributed control for optimal reactive power compensation in smart microgrids  

E-Print Network (OSTI)

We consider the problem of optimal reactive power compensation for the minimization of power distribution losses in a smart microgrid. We first propose an approximate model for the power distribution network, which allows us to cast the problem into the class of convex quadratic, linearly constrained, optimization problems. We also show how this model provides the tools for a distributed approach, in which agents have a partial knowledge of the problem parameters and state, and can only perform local measurements. Then, we design a randomized, gossip-like optimization algorithm, providing conditions for convergence together with an analytic characterization of the convergence speed. The analysis shows that the best performance can be achieved when we command cooperation among agents that are neighbors in the smart microgrid topology. Numerical simulations are included to validate the proposed model and to confirm the analytic results about the performance of the proposed algorithm.

Bolognani, Saverio

2011-01-01T23:59:59.000Z

305

Microgrids in the Evolving Electricity Generation and DeliveryInfrastructure  

Science Conference Proceedings (OSTI)

The legacy paradigm for electricity service in most of the electrified world today is based on the centralized generation-transmission-distribution infrastructure that evolved under a regulated environment. More recently, a quest for effective economic investments, responsive markets, and sensitivity to the availability of resources, has led to various degrees of deregulation and unbundling of services. In this context, a new paradigm is emerging wherein electricity generation is intimately embedded with the load in microgrids. Development and decay of the familiar macrogrid is discussed. Three salient features of microgrids are examined to suggest that cohabitation of micro and macro grids is desirable, and that overall energy efficiency can be increased, while power is delivered to loads at appropriate levels of quality.

Marnay, Chris; Venkataramanan, Giri

2006-02-01T23:59:59.000Z

306

Effects of a carbon tax on microgrid combined heat and power adoption  

E-Print Network (OSTI)

load profiles default energy tariffs (in this work from theEnergy Characteristics of Microgrid’s Individual Members Table 2. SDG&E TariffTariff Type Season Load Period Non-coincident Demand Charge ($/kW) Coincident Demand Charge ($/kW) Energy

Siddiqui, Afzal S.; Marnay, Chris; Edwards, Jennifer L.; Firestone, Ryan M.; Ghosh, Srijay; Stadler, Michael

2004-01-01T23:59:59.000Z

307

A fuzzy cognitive maps-petri nets energy management system for autonomous polygeneration microgrids  

Science Conference Proceedings (OSTI)

Autonomous polygeneration microgrids (APM) are a relatively new approach in covering specific needs like power, potable water and fuel for transportation, in remote areas. This approach has been proved to be technically feasible nowadays and even present ... Keywords: APM, FCMs, FPEMS, Fuzzy cognitive maps, Microgrids, PEM, PN, PSO, Particle swarm optimization, Petri nets, Polygeneration

George Kyriakarakos; Anastasios I. Dounis; Konstantinos G. Arvanitis; George Papadakis

2012-12-01T23:59:59.000Z

308

H? robust control of DC-AC interfaced microsource in microgrids  

Science Conference Proceedings (OSTI)

This paper focuses on the direct current -- alternating current (DC-AC) interfaced microsource based H ¿ robust control strategies in microgrids. It presents detail of a DC-AC interfaced microsource model which is connected to the ... Keywords: DC-AC interfaced microsource, H? robust control, Microgrid, f-v droop characteristic, smooth switching

Chun-Xia Dou; Fang Zhao; Xing-Bei Jia; Dong-Le Liu

2013-02-01T23:59:59.000Z

309

Toward smart microgrid with renewable energy: an overview of network design, security, and standards  

Science Conference Proceedings (OSTI)

An increasing demand for efficient and safe electricity management has motivated the development of smart grid and accelerated the technical research for smart grid. On one side, a smart microgrid has been recently given an interest as a relatively small-scale, ... Keywords: distributed energy resources (DER), network design, renewable energy, security, smart microgrid, state of the art of research and standard trend

Mihui Kim

2013-06-01T23:59:59.000Z

310

Original article: Selective compensation of voltage harmonics in grid-connected microgrids  

Science Conference Proceedings (OSTI)

In this paper, a novel approach is proposed for selective compensation of main voltage harmonics in a grid-connected microgrid. The aim of compensation is to provide a high voltage quality at the point of common coupling (PCC). PCC voltage quality is ... Keywords: Distributed generator (DG), Grid-connected, Microgrid, Voltage harmonics compensation

Mehdi Savaghebi, Juan C. Vasquez, Alireza Jalilian, Josep M. Guerrero, Tzung-Lin Lee

2013-05-01T23:59:59.000Z

311

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

E-Print Network (OSTI)

Recommendations for Technologies for Microgrids on the Big Island Prepared for U.S. Department Island microgrids By Sentech, Inc. Bethesda, Maryland And University of Hawaii Hawaii Natural Energy commercial product, process, or service by tradename, trademark, manufacturer, or otherwise does

312

Complementary Effect of Wind and Solar Energy Sources in a Microgrid  

E-Print Network (OSTI)

Complementary Effect of Wind and Solar Energy Sources in a Microgrid M. A. Barik, Student Member. Index Terms--Microgrid, renewable energy sources, reactive power mismatch, solar integration, voltage-mass energy, etc. Of them wind and solar energy is broadly used for their characteristics. This paper presents

Pota, Himanshu Roy

313

Control of Inverter-Connected Sources in Autonomous Microgrids Ian A. Hiskens Eric M. Fleming  

E-Print Network (OSTI)

into account the phase-locked loop (PLL) dynamics. An example, in which two SOFC plants provide power of a simple microgrid.1 The generators, in this case solid oxide fuel cells (SOFCs), are grid connected. When the circuit breaker opens, however, buses 1 to 4 form an autonomous microgrid, with the two SOFC sources

314

A Complex Systems Modelling Approach for Decentralised Simulation of Electrical Microgrids  

Science Conference Proceedings (OSTI)

The structure and behaviour of Electrical Grids share many of the properties of Complex Computer Systems, with microgrids and other decentralised electrical systems attached to them, so they can be interpreted as Systems of Systems. Furthermore, the ... Keywords: electrical grid, microgrid, agent-based models, complex computer systems, systems of systems

Enrique Kremers; Pablo Viejo; Oscar Barambones; Jose Gonzalez de Durana

2010-03-01T23:59:59.000Z

315

The Control Strategy Based on Improved Droop Method of Microgrid-Connected Inverters  

Science Conference Proceedings (OSTI)

A control strategy of inverters is proposed based on the control requirements of the distributed power sources in the microgrid, which realizes the seamless transition between the grid-connected mode and islanding mode. When the microgrid is connected ... Keywords: improved droop method, tranditional droop method, PQ control, V/f control

Sha Tian; Xiangqian Tong; Biying Ren

2010-06-01T23:59:59.000Z

316

Microgrid Reliability Modeling and Battery Scheduling Using Stochastic  

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

Reliability Modeling and Battery Scheduling Using Stochastic Reliability Modeling and Battery Scheduling Using Stochastic Linear Programming Title Microgrid Reliability Modeling and Battery Scheduling Using Stochastic Linear Programming Publication Type Journal Article Refereed Designation Refereed LBNL Report Number LBNL-6309E Year of Publication 2013 Authors Cardoso, Gonçalo, Michael Stadler, Afzal S. Siddiqui, Chris Marnay, Nicholas DeForest, Ana Barbosa-Póvoa, and Paulo Ferrão Journal Journal of Electric Power Systems Research Volume 103 Pagination 61-69 Date Published 06/2013 Abstract This paper describes the introduction of stochastic linear programming into Operations DER-CAM, a tool used to obtain optimal operating schedules for a given microgrid under local economic and environmental conditions. This application follows previous work on optimal scheduling of a lithium-iron-phosphate battery given the output uncertainty of a 1 MW molten carbonate fuel cell. Both are in the Santa Rita Jail microgrid, located in Dublin, California. This fuel cell has proven unreliable, partially justifying the consideration of storage options. Several stochastic DER-CAM runs are executed to compare different scenarios to values obtained by a deterministic approach. Results indicate that using a stochastic approach provides a conservative yet more lucrative battery schedule. Lower expected energy bills result, given fuel cell outages, in potential savings exceeding 6%.

317

A Green Prison: The Santa Rita Jail Campus Microgrid  

Science Conference Proceedings (OSTI)

A large microgrid project is nearing completion at Alameda County’s twenty-two-year-old 45 ha 4,000-inmate Santa Rita Jail, about 70 km east of San Francisco. Often described as a green prison, it has a considerable installed base of distributed energy resources (DER) including an eight-year old 1.2 MW PV array, a five-year old 1 MW fuel cell with heat recovery, and considerable efficiency investments. A current US$14 M expansion adds a 2 MW-4 MWh Li-ion battery, a static disconnect switch, and various controls upgrades. During grid blackouts, or when conditions favor it, the Jail can now disconnect from the grid and operate as an island, using the on-site resources described together with its back-up diesel generators. In other words, the Santa Rita Jail is a true microgrid, or ?grid, because it fills both requirements, i.e. it is a locally controlled system, and it can operate both grid connected and islanded. The battery’s electronics includes Consortium for Electric Reliability Technology (CERTS) Microgrid technology. This enables the battery to maintain energy balance using droops without need for a fast control system.

Marnay, Chris; DeForest, Nicholas; Lai, Judy

2012-01-22T23:59:59.000Z

318

Performance of the Sendai Microgrid During the 2011 Earthquake and Tsunami  

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

Performance of the Sendai Microgrid During the 2011 Earthquake and Tsunami Performance of the Sendai Microgrid During the 2011 Earthquake and Tsunami Speaker(s): Keiichi Hirose Date: March 23, 2012 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Chris Marnay This seminar provides an overview of the Sendai Microgrid, and outlines its behavior during the earthquake and its aftermath. On March 11, 2011, an earthquake of unprecedented violence occurred in the Tohoku region, along Japan's Pacific Coast. The extremely intense vibrations severely damaged electric utility facilities, and the subsequent tsunami washed away many coastal towns and villages. The Sendai Microgrid at Tohoku Fukushi University, located northwest of downtown Sendai, had been built and demonstrated over the four years beginning in 2005. The Microgrid was

319

Hardware Development of a Laboratory-Scale Microgrid Phase 2: Operation and Control of a Two-Inverter Microgrid  

SciTech Connect

This report summarizes the activities of the second year of a three-year project to develop control software for microsource distributed generation systems. In this phase, a laboratory-scale microgrid was expanded to include: (1) Two emulated distributed resources; (2) Static switchgear to allow rapid disconnection and reconnection; (3) Electronic synchronizing circuitry to enable transient-free grid interconnection; (4) Control software for dynamically varying the frequency and voltage controller structures; and (5) Power measurement instrumentation for capturing transient waveforms at the interconnect during switching events.

Illindala, M. S.; Piagi, P.; Zhang, H.; Venkataramanan, G.; Lasseter, R. H.

2004-03-01T23:59:59.000Z

320

2012 SG Peer Review - Smart Inverter Controls and Microgrid Interoperation at DECC - Tom Rizy, ORNL  

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

g g Peer Review Meeting Smart Inverter Controls & Microgrid Interoperation at the Distributed Energy Communications & Controls (DECC) Lab ( ) D. Tom Rizy Oak Ridge National Laboratory (ORNL) June 7 th 2012 June 7 th , 2012 Smart Inverter (SI) Controls and Microgrid (MG) Interoperation Microgrid (MG) Interoperation Objectives * D l d SI l f l i l DECC Microgrid * Develop and test SI controls for multiple renewable/nonrenewable DER. * Develop MG controls and communication requirements for high penetration DER. * I l t MG t DECC L b Technical Scope * Implement MG at DECC Lab. * Transfer technology to industry. Life-cycle Funding Summary ($K) Prior to FY12 FY13 Out- Technical Scope * Develop advanced smart inverter control consisting of local droop (P-f, Q-V) control integrated with secondary closed

Note: This page contains sample records for the topic "modified microgrid concept" 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

A Framework for the Evaluation of the Cost and Benefits of Microgrids  

E-Print Network (OSTI)

wind energy due in part to the good availability of wind[25],[26].The benefitbenefits to a variety of stakeholders. KEYWORDS Distributed Generation, Distribution Planning, Microgrids, Wind Energy

Morris, Greg Young

2012-01-01T23:59:59.000Z

322

2012 SG Peer Review - CERTS Microgrid Test Bed - Joe Eto, LBNL  

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

Peer Peer Review Meeting Peer Review Meeting The CERTS Microgrid Test Bed g Joe Eto Lawrence Berkeley National Laboratory 7 June 2012 The CERTS Microgrid Test Bed Objective To lower the cost and improve the performance of clusters of smaller distributed energy resources and loads when operated in an integrated manner when operated in an integrated manner, i.e., as microgrids Life-cycle Funding Summary ($K) Prior to FY12, FY13, Out-year(s) Technical Scope The CERTS Microgrid Test Bed is being expanded through the addition of new hardware elements: 1) a CERTS- compatible conventional synchronous generator ; 2) an FY 12 , authorized , requested y ( ) 2500K 1000K 1000K 2500K energy management system relying on software as a service (SaaS) for dispatch; 3) a commercially available, stand-alone

323

A Unified Technique for Dynamic Modeling and Stability Analysis of Microgrid Systems.  

E-Print Network (OSTI)

??This work presents a unified method for dynamic modeling and stability analysis of microgrid power systems. Using the automated state-model generation algorithm, a state-space model… (more)

Johnson, Brian B.

2010-01-01T23:59:59.000Z

324

Toward data-driven demand-response optimization in a campus microgrid  

Science Conference Proceedings (OSTI)

We describe and demonstrate a prototype software architecture to support data-driven demand response optimization (DR) in the USC campus microgrid, as part of the Los Angeles Smart Grid Demonstration Project. The architecture includes a semantic ...

Yogesh Simmhan; Viktor Prasanna; Saima Aman; Sreedhar Natarajan; Wei Yin; Qunzhi Zhou

2011-11-01T23:59:59.000Z

325

Magnetic anisotropy in a permalloy microgrid fabricated by near-field optical lithography  

Science Conference Proceedings (OSTI)

We report the fabrication and magnetic properties of permalloy microgrids prepared by near-field optical lithography and characterized using high-sensitivity magneto-optical Kerr effect techniques. A fourfold magnetic anisotropy induced by the grid architecture is identified.

S. P. Li; A. Lebib; D. Peyrade; M. Natali; Y. Chen; W. S. Lew; J. A. C. Bland

2001-01-01T23:59:59.000Z

326

Integration& Operation of a Microgrid at Santa Rita Jail  

DOE Green Energy (OSTI)

Santa Rita Jail is a 4,500 inmate facility located in Dublin CA, approximately 40 miles (65 km) east of San Francisco. Over the past decade, a series of Distributed Energy Resources (DER) installations and efficiency measures have been undertaken to transform the 3MW facility into a"Green Jail". These include a 1.2MW rated rooftop PV system installed in 2002, a 1MW molten carbonate fuel cell with CHP, and retrofits to lighting and HVAC systems to reduce peak loads. With the upcoming installation of a large-scale battery and fast static disconnect switch, Santa Rita Jail will become a true microgrid, with full CERTS Microgrid functionality. Consequently, the jail will be able to seamlessly disconnect from the grid and operate as an island in the event of a disturbance, reconnecting again once the disturbance has dissipated. The extent to which that jail is capable of islanding is principally dependant on the energy capacity of the battery-one focus of this investigation. Also presented here are overviews of the DER currently installed at the jail, as well as the value it provides by offsetting the purchase of electricity under the current Pacific Gas& Electric (PG&E) tariff.

Chevron Energy Solutions; Alameda County; DeForest, Nicholas; Lai, Judy; Stadler, Michael; Mendes, Goncalo; Marnay, Chris; Donadee, Jon

2011-05-01T23:59:59.000Z

327

Compatibility Tests for Dissimilar Types of Distributed Generation Powering a Microgrid  

Science Conference Proceedings (OSTI)

Microgrids are small power systems that can operate independently of the bulk power system. They are composed of one or more distributed resources (DR) and electrical loads that are interconnected by a distribution system. Most of today's microgrids are fairly simple in design, consisting of a single generator supplying a dedicated load or of multiple identical generating units ganged to operate much like a single unit. This report addresses technical issues involved when dissimilar generators are used.

2003-03-12T23:59:59.000Z

328

Energy storage sizing for improved power supply availability during extreme events of a microgrid with renewable energy sources.  

E-Print Network (OSTI)

??A new Markov chain based energy storage model to evaluate the power supply availability of microgrids with renewable energy generation for critical loads is proposed.… (more)

Song, Junseok

2012-01-01T23:59:59.000Z

329

Panel on Microgrids Systems International Conference on System of Systems Engineering, April 16-18, 2007 San Antonio Abstract--Application of individual distributed generators can  

E-Print Network (OSTI)

, isolating the microgrid's load from the disturbance (and thereby maintaining high level of service) withoutArnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Test Plan Section 6.0 Microgrid Test Bed System Checkout (Static Switch) Prepared For: California Energy Commission Public Interest

330

286 IEEE TRANSACTIONS ON SMART GRID, VOL. 1, NO. 3, DECEMBER 2010 Short-Term Load Forecast of Microgrids by a New  

E-Print Network (OSTI)

of Microgrids by a New Bilevel Prediction Strategy Nima Amjady, Senior Member, IEEE, Farshid Keynia, Member, IEEE, and Hamidreza Zareipour, Senior Member, IEEE Abstract--Microgrids are a rapidly growing sector. In the operation of a microgrid, forecasting the short-term load is an important task. With a more accurate short

331

Mitigation of Voltage and Current Harmonics in Grid-Connected Microgrids Savaghebi, Mehdi; Guerro, Josep M.; Jalilian, Alireza ; Quintero, Juan Carlos Vasquez  

E-Print Network (OSTI)

Mitigation of Voltage and Current Harmonics in Grid-Connected Microgrids Savaghebi, Mehdi; Guerro-Connected Microgrids. In Proceedings of the 21st IEEE International Symposium on Industrial Electronics (ISIE), 2012;Mitigation of Voltage and Current Harmonics in Grid-Connected Microgrids Mehdi Savaghebi1 , Josep M. Guerrero

Vasquez, Juan Carlos

332

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. XX, NO. XX, MONTH 20XX 1 Decentralized Economic Dispatch in Microgrids via  

E-Print Network (OSTI)

Economic Dispatch in Microgrids via Heterogeneous Wireless Networks Hao Liang, Student Member, IEEE, Bong) Shen, Fellow, IEEE Abstract--As essential building blocks of the future smart grid, microgrids can output, we propose a heterogeneous wireless network architecture for microgrids. Low-cost short- range

Zhuang, Weihua

333

Consortium for Electric Reliability Technology Solutions CERTS Customer Adoption Model  

E-Print Network (OSTI)

....................................................................................................1 1.2 MICROGRID CONCEPT .....................................................................................................................18 3.5 MICROGRID

334

Microsoft PowerPoint - DOD Microgrid 102513 SHORT.pptx  

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

Success Stories in DOE's Success Stories in DOE's ARRA Smart Grid Program Steve Bossart, Senior Energy Analyst Smart Grids & Microgrids for Government & Military Symposium October 24-25, 2013, Arlington, VA ‹#› Topics * OE ARRA Smart Grid Program * OE ARRA Smart Grid Progress * Case Studies/Success Stories * Life After ARRA Smart Grid ‹#› DOE OE ARRA Smart Grid Program ‹#› American Recovery and Reinvestment Act ($4.5B) * Smart Grid Investment Grants (99 projects) - $3.4 billion Federal; $4.7 billion private sector - > 800 PMUs covering almost 100% of transmission - ~ 8000 distribution automation circuits - > 15 million smart meters * Smart Grid Demonstration Projects (32 projects) - $685 million Federal; $1 billion private sector - 16 storage projects - 16 regional demonstrations

335

Optimization and Control of Cooling Microgrids for Data Centers  

E-Print Network (OSTI)

Abstract — Reliable operation of today’s data centers requires a tremendous amount of electricity to power both the IT equipment and the supporting cooling facilities. As much as half of total data center electricity consumption can be attributed to the cooling systems required to maintain the thermal status of IT equipment. In order to lower the electricity usage of the cooling system and hence reduce the data center environmental footprint, alternative cooling resources, such as water and air-side economizers, are being exploited to supplement or replace the traditional chilled water based cooling schemes. The various cooling resource options, together with the mechanisms to distribute and deliver the cooling resource to IT equipment racks, constitute a cooling microgrid. In this paper, we present a holistic perspective for the optimization and control of the data

Rongliang Zhou; Zhikui Wang; Alan Mcreynolds; Cullen E. Bash; Thomas W; Christian Rocky Shih

2012-01-01T23:59:59.000Z

336

Design and Performance of Solar Decathlon 2011 High-Penetration Microgrid: Preprint  

DOE Green Energy (OSTI)

The U.S. Department of Energy Solar Decathlon challenges collegiate teams to design, build, and operate solar-powered houses that are cost-effective, energy-efficient, and attractive. The Solar Decathlon 2011 was held in Washington, D.C., from September 23 to October 2, 2011 . A high-penetration microgrid was designed, installed, and operated for the Solar Decathlon 2011 to grid-connect 19 highly energy-efficient, solar-powered competition houses to a single utility connection point. The capacity penetration of this microgrid (defined as maximum PV generation divided by maximum system load over a two-week period) was 74% based on 1-minute averaged data. Temporary, ground-laid conductors and electrical distribution equipment were installed to grid-connect the Solar Decathlon village, which included the houses as well as other electrical loads used by the event organizers. While 16 of the houses were connected to the 60 Hz microgrid, three houses from Belgium, China, and New Zealand were supplied with 50 Hz power. The design of the microgrid, including the connection of the houses powered by 50 Hz and a standby diesel generator, is discussed in this paper. In addition to the utility-supplied net energy meters at each house, a microgrid monitoring system was installed to measure and record energy consumption and PV energy production at 1-second intervals at each house. Bidirectional electronic voltage regulators were installed for groups of competition houses, which held the service voltage at each house to acceptable levels. The design and successful performance of this high-penetration microgrid is presented from the house, microgrid operator, and utility perspectives.

Stafford, B.; Coddington, M.; Butt, R.; Solomon, S.; Wiegand, G.; Wagner, C.; Gonzalez, B.

2012-04-01T23:59:59.000Z

337

Microgrids: An emerging paradigm for meeting building electricityand heat requirements efficiently and with appropriate energyquality  

Science Conference Proceedings (OSTI)

The first major paradigm shift in electricity generation,delivery, and control is emerging in the developed world, notably Europe,North America, and Japan. This shift will move electricity supply awayfrom the highly centralised universal service quality model with which weare familiar today towards a more dispersed system with heterogeneousqualities of service. One element of dispersed control is the clusteringof sources and sinks into semi-autonomous mu grids (microgrids).Research, development, demonstration, and deployment (RD3) of mu gridsare advancing rapidly on at least three continents, and significantdemonstrations are currently in progress. This paradigm shift will resultin more electricity generation close to end-uses, often involvingcombined heat and power application for building heating and cooling,increased local integration of renewables, and the possible provision ofheterogeneous qualities of electrical service to match the requirementsof various end-uses. In Europe, mu grid RD3 is entering its third majorround under the 7th European Commission Framework Programme; in the U.S.,one specific mu grid concept is undergoing rigorous laboratory testing,and in Japan, where the most activity exists, four major publiclysponsored and two privately sponsored demonstrations are in progress.This evolution poses new challenges to the way buildings are designed,built, and operated. Traditional building energy supply systems willbecome much more complex in at least three ways: 1. one cannot simplyassume gas arrives at the gas meter, electricity at its meter, and thetwo systems are virtually independent of one another; rather, energyconversion, heat recovery and use, and renewable energy harvesting mayall be taking place simultaneously within the building energy system; 2.the structure of energy flows in the building must accommodate multipleenergy processes in a manner that permits high overall efficiency; and 3.multiple qualities of electricity may be supplied to various buildingfunctions.

Marnay, Chris; Firestone, Ryan

2007-04-10T23:59:59.000Z

338

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

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

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

339

A Framework for the Evaluation of the Cost and Benefits of Microgrids  

DOE Green Energy (OSTI)

A Microgrid is recognized as an innovative technology to help integrate renewables into distribution systems and to provide additional benefits to a variety of stakeholders, such as offsetting infrastructure investments and improving the reliability of the local system. However, these systems require additional investments for control infrastructure, and as such, additional costs and the anticipated benefits need to be quantified in order to determine whether the investment is economically feasible. This paper proposes a methodology for systematizing and representing benefits and their interrelationships based on the UML Use Case paradigm, which allows complex systems to be represented in a concise, elegant format. This methodology is demonstrated by determining the economic feasibility of a Microgrid and Distributed Generation installed on a typical Canadian rural distribution system model as a case study. The study attempts to minimize the cost of energy served to the community, considering the fixed costs associated with Microgrids and Distributed Generation, and suggests benefits to a variety of stakeholders.

Morris, Greg Young; Abbey, Chad; Joos, Geza; Marnay, Chris

2011-07-15T23:59:59.000Z

340

Control Strategies for Distributed Energy Resources to Maximize the Use of Wind Power in Rural Microgrids  

Science Conference Proceedings (OSTI)

The focus of this paper is to design control strategies for distributed energy resources (DERs) to maximize the use of wind power in a rural microgrid. In such a system, it may be economical to harness wind power to reduce the consumption of fossil fuels for electricity production. In this work, we develop control strategies for DERs, including diesel generators, energy storage and demand response, to achieve high penetration of wind energy in a rural microgrid. Combinations of centralized (direct control) and decentralized (autonomous response) control strategies are investigated. Detailed dynamic models for a rural microgrid are built to conduct simulations. The system response to large disturbances and frequency regulation are tested. It is shown that optimal control coordination of DERs can be achieved to maintain system frequency while maximizing wind power usage and reducing the wear and tear on fossil fueled generators.

Lu, Shuai; Elizondo, Marcelo A.; Samaan, Nader A.; Kalsi, Karanjit; Mayhorn, Ebony T.; Diao, Ruisheng; Jin, Chunlian; Zhang, Yu

2011-10-10T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Game Theoretic Approach for Elastic and Inelastic Demand Management in Microgrid  

E-Print Network (OSTI)

Smart grid, which consists of many small microgrids, leads to a more stable and secure grid. In this paper, we proposed a game theoretic approach using a novel combinational pricing signal for the demand side management in a microgrid. We classified the appliance in a smart grid into appliance with elastic energy demand and appliance with inelastic appliance. We use game-theoretic approach to analyze the interaction between the microgrid operator and end users as well as among end users themself. We formulate the problem as a single leader, multiple followers Stackelberg game. An unique Stackelberg-Nash equilibrium is derived under two-fold pricing at first and then extended to case of uniform pricing scheme. 1

unknown authors

2011-01-01T23:59:59.000Z

342

Effects of a carbon tax on microgrid combined heat and power adoption  

Science Conference Proceedings (OSTI)

This paper describes the economically optimal adoption and operation of distributed energy resources (DER) by a hypothetical California microgrid consisting of a group of commercial buildings over an historic test year, 1999. The optimization is conducted using a customer adoption model (DER-CAM) developed at Berkeley Lab and implemented in the General Algebraic Modeling System (GAMS). A microgrid is a semiautonomous grouping of electricity and heat loads interconnected to the existing utility grid (macrogrid) but able to island from it. The microgrid minimizes the cost of meeting its energy requirements (consisting of both electricity and heat loads) by optimizing the installation and operation of DER technologies while purchasing residual energy from the local combined natural gas and electricity utility. The available DER technologies are small-scale generators (microgrid is allowed to install CHP-enabled DER technologies, its carbon emissions are mitigated more than without CHP, demonstrating the potential benefits of small-scale CHP technology for climate change mitigation. Reciprocating engines with heat recovery and/or absorption cooling tend to be attractive technologies for the mild southern California climate, but the carbon mitigation tends to be modest compared to purchasing utility electricity because of the predominance of relatively clean central station generation in California.

Siddiqui, Afzal S.; Marnay, Chris; Edwards, Jennifer L.; Firestone, Ryan M.; Ghosh, Srijay; Stadler, Michael

2004-11-01T23:59:59.000Z

343

Synchronization and power sharing for droop-controlled inverters in islanded microgrids  

Science Conference Proceedings (OSTI)

Motivated by the recent and growing interest in smart grid technology, we study the operation of DC/AC inverters in an inductive microgrid. We show that a network of loads and DC/AC inverters equipped with power-frequency droop controllers can be cast ... Keywords: Coupled oscillators, Distributed control, Inverters, Kuramoto model, Power-system control, Smart power applications, Synchronization

John W. Simpson-Porco, Florian DöRfler, Francesco Bullo

2013-09-01T23:59:59.000Z

344

Connectivity and Bidirectional Energy Transfer in DC Microgrid Featuring Different Voltage Characteristics  

Science Conference Proceedings (OSTI)

In this paper, the connectivity issues related to linking two DC buses featuring different voltage characteristics, in terms of voltage level and ripple, in a DC micro grid are identified, analyzed and discussed. A controlled DC-DC converter was used ... Keywords: Bidirectional energy transfer, buck-boost converter, DC distribution systems, DC microgrids, voltage ripple

Mustafa Farhadi, Ahmed Mohamed, Osama Mohammed

2013-04-01T23:59:59.000Z

345

Magnetic anisotropy in a permalloy microgrid fabricated by near-field optical lithography  

Science Conference Proceedings (OSTI)

We report the fabrication and magnetic properties of permalloy microgrids prepared by near-field optical lithography and characterized using high-sensitivity magneto-optical Kerr effect techniques. A fourfold magnetic anisotropy induced by the grid architecture is identified. {copyright} 2001 American Institute of Physics.

Li, S. P.; Lebib, A.; Peyrade, D.; Natali, M.; Chen, Y.; Lew, W. S.; Bland, J. A. C.

2001-07-01T23:59:59.000Z

346

The CERTS Microgrid and the Future of the Chris Marnay and Owen C. Bailey  

E-Print Network (OSTI)

LBNL-55281 The CERTS Microgrid and the Future of the Macrogrid Chris Marnay and Owen C. Bailey contract DE-AC03-76SF00098, and by the California Energy Commission Public Interest Energy Research Program not infringe privately owned rights. Reference herein to any specific commercial product, process, or service

347

A Holonic Control Architecture for a Heterogeneous Multi-Objective Smart Micro-Grid  

E-Print Network (OSTI)

A Holonic Control Architecture for a Heterogeneous Multi-Objective Smart Micro-Grid Sylvain Frey--Designing the control infrastructure of future "smart" power grids is a challenging task. Such grids will integrate scales. Smart grids will need to control these in order to attain global objectives at the macro

Diaconescu, Ada

348

Effects of a carbon tax on microgrid combined heat and power adoption  

DOE Green Energy (OSTI)

This paper describes the economically optimal adoption and operation of distributed energy resources (DER) by a hypothetical California microgrid consisting of a group of commercial buildings over an historic test year, 1999. The optimization is conducted using a customer adoption model (DER-CAM) developed at Berkeley Lab and implemented in the General Algebraic Modeling System (GAMS). A microgrid is a semiautonomous grouping of electricity and heat loads interconnected to the existing utility grid (macrogrid) but able to island from it. The microgrid minimizes the cost of meeting its energy requirements (consisting of both electricity and heat loads) by optimizing the installation and operation of DER technologies while purchasing residual energy from the local combined natural gas and electricity utility. The available DER technologies are small-scale generators (< 500 kW), such as reciprocating engines, microturbines, and fuel cells, with or without combined heat and power (CHP) equipment, such as water and space heating and/or absorption cooling. By introducing a tax on carbon emissions, it is shown that if the microgrid is allowed to install CHP-enabled DER technologies, its carbon emissions are mitigated more than without CHP, demonstrating the potential benefits of small-scale CHP technology for climate change mitigation. Reciprocating engines with heat recovery and/or absorption cooling tend to be attractive technologies for the mild southern California climate, but the carbon mitigation tends to be modest compared to purchasing utility electricity because of the predominance of relatively clean central station generation in California.

Siddiqui, Afzal S.; Marnay, Chris; Edwards, Jennifer L.; Firestone, Ryan M.; Ghosh, Srijay; Stadler, Michael

2004-11-01T23:59:59.000Z

349

Modeling and Simulation for Grid Fault Impacts on a DC Microgrid  

Science Conference Proceedings (OSTI)

A micro grid consists of several distributed generation resources and local loads, which provide the solution to supply premium power to remote or specific areas. To the design of a micro grid, it is necessary to perform computer simulation for the planning ... Keywords: DC microgrid, bi-directional inverter, wind turbine, fuel cell, battery

H. C. Su; G. W. Chang; B. W. Liu; J. H. Chen; K. K. Jen; C. H. Chung; J. Z. Wu

2012-06-01T23:59:59.000Z

350

Enhanced photocatalytic activity of Ag microgrid connected Ti O 2 nanocrystalline films  

Science Conference Proceedings (OSTI)

One reason for the high degree of photogenerated carrier recombination was found to be the charge accumulation caused by the uneven reaction area on the photocatalyst surface. The authors connected Ti O 2 nanoparticles with conducting Ag microgrid. Obvious photocatalytic activity improvement (81%) over the pure Ti O 2 was observed

Feng Pan; Junying Zhang; Weiwei Zhang; Tianmin Wang; Chao Cai

2007-01-01T23:59:59.000Z

351

An Architecture of MicroGrid Based on Role on Autonomous Decentralized System  

Science Conference Proceedings (OSTI)

This paper presents a conceptual architecture for Micro Grid. The approach utilizes the strategy of control and coordination from Role Autonomous Decentralized System (RoADS) for autonomous operation of a Micro Grid. This architecture aims to optimize ... Keywords: MicroGrid, Role, Role Autonomous Decentralized System (RoADS), Role Field, Data Field Dual-driven Architecture (RDDA), Coordination, µEMS

Peng Li; Tianhu Ma; Yongdong Tan

2011-03-01T23:59:59.000Z

352

Multi Agent System based fault location and isolation in a smart microgrid system  

Science Conference Proceedings (OSTI)

In this paper, a Multi Agent System (MAS) based on sequence current magnitudes and current direction is proposed for fault location and isolation in a smart microgrid system. Each of the fault types has a different impact on the sequence current components, ...

Seetaram Alwala; Ali Feliachi; M. A. Choudhry

2012-01-01T23:59:59.000Z

353

A Secure Energy Routing Mechanism for Sharing Renewable Energy in Smart Microgrid  

E-Print Network (OSTI)

A Secure Energy Routing Mechanism for Sharing Renewable Energy in Smart Microgrid Ting Zhu Sheng and wind turbines on every house sharing renewable energy among houses. How to efficiently and optimally share energy is a challenging problem. In order to efficiently share renewable energy, routing protocols

Massachusetts at Amherst, University of

354

Vehicle to Micro-Grid: Leveraging Existing Assets for Reliable Energy Management (Poster)  

DOE Green Energy (OSTI)

Fort Carson, a United States Army installation located south of Colorado Springs, Colorado, is seeking to be a net-zero energy facility. As part of this initiative, the base will be constructing a micro-grid that ties to various forms of renewable energy. To reduce petroleum consumption, Fort Carson is considering grid-connected vehicles (GCVs) such as pure electric trucks to replace some of its on-base truck fleet. As the availability and affordability of distributed renewable energy generation options increase, so will the GCV options (currently, three all-electric trucks are available on the GSA schedule). The presence of GCVs on-base opens up the possibility to utilize these vehicles to provide stability to the base micro-grid. This poster summarizes work to estimate the potential impacts of three electric vehicle grid interactions between the electric truck fleet and the Fort Carson micro-grid: 1) full-power charging without management, 2) full-power charging capability controlled by the local grid authority, and 3) full-power charge and discharge capability controlled by the local grid authority. We found that even at relatively small adoption rates, the control of electric vehicle charging at Fort Carson will aid in regulation of variable renewable generation loads and help stabilize the micro-grid.

Simpson, M.; Markel, T.; O'Keefe, M.

2010-12-01T23:59:59.000Z

355

The added economic and environmental value of plug-in electric vehicles connected to commercial building microgrids  

E-Print Network (OSTI)

Energy Reliability, Distributed Energy Program of the U.S.emissions, a microgrid/distributed-energy-resources (DER)Energy Reliability, Distributed Energy Program of the U.S.

Stadler, Michael

2010-01-01T23:59:59.000Z

356

A Micro-Grid Simulator Tool (SGridSim) using Effective Node-to-Node Complex Impedance (EN2NCI) Models  

SciTech Connect

This paper presents a micro-grid simulator tool useful for implementing and testing multi-agent controllers (SGridSim). As a common engineering practice it is important to have a tool that simplifies the modeling of the salient features of a desired system. In electric micro-grids, these salient features are the voltage and power distributions within the micro-grid. Current simplified electric power grid simulator tools such as PowerWorld, PowerSim, Gridlab, etc, model only the power distribution features of a desired micro-grid. Other power grid simulators such as Simulink, Modelica, etc, use detailed modeling to accommodate the voltage distribution features. This paper presents a SGridSim micro-grid simulator tool that simplifies the modeling of both the voltage and power distribution features in a desired micro-grid. The SGridSim tool accomplishes this simplified modeling by using Effective Node-to-Node Complex Impedance (EN2NCI) models of components that typically make-up a micro-grid. The term EN2NCI models means that the impedance based components of a micro-grid are modeled as single impedances tied between their respective voltage nodes on the micro-grid. Hence the benefit of the presented SGridSim tool are 1) simulation of a micro-grid is performed strictly in the complex-domain; 2) faster simulation of a micro-grid by avoiding the simulation of detailed transients. An example micro-grid model was built using the SGridSim tool and tested to simulate both the voltage and power distribution features with a total absolute relative error of less than 6%.

Udhay Ravishankar; Milos manic

2013-08-01T23:59:59.000Z

357

A NOVEL HYDRO-GENERATOR BASED ENERGY STORAGE CONCEPT FOR MICROGRID APPLICATIONS.  

E-Print Network (OSTI)

??The solution to deal with the current non-renewable energy crisis, global warming, pollution and green gas emission is to reduce fossil fuels usage and increase… (more)

GU, RAN

2012-01-01T23:59:59.000Z

358

CERTS Microgrid Laboratory Test Bed - PIER Final Project Report  

E-Print Network (OSTI)

SYMMETRICAL COMPONENTS ..4. Protection Based on Symmetrical Components An SLG or LLthe concept of symmetrical components is usually employed [

Eto, Joseph H.

2008-01-01T23:59:59.000Z

359

This document is a preprint of the final paper: Shafiee, Qobad; Vasquez, Juan C.; Guerrero, Josep M.; , "Distributed secondary control for islanded MicroGrids -A networked control systems approach," IECON 2012 -38th Annual Conference on IEEE Industrial El  

E-Print Network (OSTI)

.; , "Distributed secondary control for islanded MicroGrids - A networked control systems approach," IECON 2012 - 38://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6389034&isnumber=6388505 1 Distributed Secondary Control for Islanded MicroGrids ­ A Networked Control presents a novel approach to conceive the secondary control in droop-controlled MicroGrids

Vasquez, Juan Carlos

360

This document is a preprint of the final paper: Savaghebi, M.; Vasquez, J.C.; Jalilian, A.; Guerrero, J.M.; Tzung-Lin Lee; , "Selective harmonic virtual impedance for voltage source inverters with LCL filter in microgrids," Energy Conversion  

E-Print Network (OSTI)

with LCL filter in microgrids," Energy Conversion Congress and Exposition (ECCE), 2012 IEEE , vol., no., pp in Microgrids Mehdi Savaghebi1 , Juan C. Vasquez2 , Alireza Jalilian1 , Josep M. Guerrero2 , and Tzung-Lin Lee3 source inverters ended with LCL filters for microgrid applications. The control approach consists

Vasquez, Juan Carlos

Note: This page contains sample records for the topic "modified microgrid concept" 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

The MicroGrid: a Scientific Tool for Modeling Computational Grids  

E-Print Network (OSTI)

The complexity and dynamic nature of the Internet (and the emerging Computational Grid) demand that middleware and applications adapt to the changes in configuration and availability of resources. However, to the best of our knowledge there are no simulation tools which support systematic exploration of dynamic Grid software (or Grid resource) behavior. We describe our vision and initial efforts to build tools to meet these needs. Our MicroGrid simulation tools enable Globus applications to be run in arbitrary virtual grid resource environments, enabling broad experimentation. We describe the design of these tools, and their validation on microbench marks, the NAS parallel benchmarks, and an entire Grid application. These validation experiments show that the MicroGrid can match actual experiments within a few percent (2% to 4%).

H. J. Song; X. Liu; D. Jakobsen; R. Bhagwan; X. Zhang; K. Taura; A. Chien

2000-01-01T23:59:59.000Z

362

Added Value of Reliability to a Microgrid: Simulations of Three California Buildings  

Science Conference Proceedings (OSTI)

The Distributed Energy Resources Customer Adoption Model is used to estimate the value an Oakland nursing home, a Riverside high school, and a Sunnyvale data center would need to put on higher electricity service reliability for them to adopt a Consortium for Electric Reliability Technology Solutions Microgrid (CM) based on economics alone. A fraction of each building's load is deemed critical based on its mission, and the added cost of CM capability to meet it added to on-site generation options. The three sites are analyzed with various resources available as microgrid components. Results show that the value placed on higher reliability often does not have to be significant for CM to appear attractive, about 25 $/kWcdota and up, but the carbon footprint consequences are mixed because storage is often used to shift cheaper off-peak electricity to use during afternoon hours in competition with the solar sources.

Marnay, Chris; Lai, Judy; Stadler, Michael; Siddiqui, Afzal

2009-05-07T23:59:59.000Z

363

Assessment of the Economic Potential of Microgrids for Reactive Power Supply  

DOE Green Energy (OSTI)

As power generation from variable distributed energy resources (DER) grows, energy flows in the network are changing, increasing the requirements for ancillary services, including voltage support. With the appropriate power converter, DER can provide ancillary services such as frequency control and voltage support. This paper outlines the economic potential of DERs coordinated in a microgrid to provide reactive power and voltage support at its point of common coupling. The DER Customer Adoption Model assesses the costs of providing reactive power, given local utility rules. Depending on the installed DER, the cost minimizing solution for supplying reactive power locally is chosen. Costs include the variable cost of the additional losses and the investment cost of appropriately over-sizing converters or purchasing capacitors. A case study of a large health care building in San Francisco is used to evaluate different revenue possibilities of creating an incentive for microgrids to provide reactive power.

Appen, Jan von; Marnay, Chris; Stadler, Michael; Momber, Ilan; Klapp, David; Scheven, Alexander von

2011-05-01T23:59:59.000Z

364

Introduction of the Renewable Micro-Grid Test-Bed Dr. Wenxin Liu  

E-Print Network (OSTI)

Turbine: PMSM, 3kW, 8.3A Wind Generator: PMSM, 3kW, 8.3A 3 AC/DC Converter & DC/AC Inverter Wind Wind Turbine #1 3kW, 8.3A Wind Turbine #2 3kW Wind Generator #2 3kW RS232 Communication Renewable-bed Wind Turbine Generator Simulators ES Simulator AC Load M/G Set 1 Overview of the Micro-grid Test

Johnson, Eric E.

365

The MicroGrid: Using Emulation to Predict Application Performance in Diverse Grid Network Environments  

E-Print Network (OSTI)

Improvements in networking and middleware technology are enabling large-scale grids that aggregate resources over wide-area networks to support applications at unprecedented levels of scale and performance. Unfortunately, existing middleware and tools can not in general inform a user as to the suitability of a given grid topology for a specific grid application. Instead, users generally develop ad hoc performance models for mapping their applications to resource and network topologies. Because application behavior alone is complex, and resource and network behavior further complicate the picture, users are typically reduced to nearly blind experimentation to discover how to deploy their application in the new grid environment. Only after the fact can a user discovers if the match was a good one. Further, even after finding a desirable configuration, there is no basis on which to determine if a much better configuration exists. We present a richer methodology for evaluating grid software and diverse grid environments based on the MicroGrid grid emulator. With the MicroGrid, users, grid researchers, or grid operators can define and emulate arbitrary collections of resources and networks. This allows study of an existing grid testbed under controlled conditions or even to study the efficacy of higher performance environments than are available today. Further, the MicroGrid supports direct execution of grid applications unchanged. These application can be written with MPI, C, C++, Perl, and/or Python and use the Globus middleware. This enables detailed and accurate study of application behavior.

Huaxia Xia; Holly Dail Ý; Henri Casanova *ý; Andrew Chien

2004-01-01T23:59:59.000Z

366

Online energy generation scheduling for microgrids with intermittent energy sources and cogeneration. arXiv preprint arXiv:1211.4473  

E-Print Network (OSTI)

Microgrids represent an emerging paradigm of future electric power systems that can utilize both distributed and centralized generations. Two recent trends in microgrids are the integration of local renewable energy sources (such as wind farms) and the use of co-generation (i.e., to supply both electricity and heat). However, these trends also bring unprecedented challenges to the design of intelligent control strategies for microgrids. Traditional generation scheduling paradigms rely on perfect prediction of future electricity supply and demand. They are no longer applicable to microgrids with unpredictable renewable energy supply and with co-generation (that needs to consider both electricity and heat demand). In this paper, we study online algorithms for the microgrid generation scheduling problem with intermittent

Lian Lu; Jinlong Tu; Chi-kin Chau; Minghua Chen; Xiaojun Lin

2012-01-01T23:59:59.000Z

367

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

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

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

368

Carbyne contamination in carbon-coated TEM microgrids made from vacuum-resistive heating deposition from a graphite rod  

Science Conference Proceedings (OSTI)

Carbyne contamination was found to exist on the as-prepared carbon-coated transmission electron microscope (TEM) microgrids made by the method of vacuum-resistive heating deposition from a graphite rod. It is a source to bring mistaken and confusing information to the samples being studied by TEM.

Li Hanying; Sun Jingzhi; Wang Youwen; Chen Hongzheng; Cao Jian; Wang Mang

2004-03-15T23:59:59.000Z

369

Abstract--Increasing concerns about energy security and reliability are intensifying the interest in microgrid and vehicle-  

E-Print Network (OSTI)

Engineering. Benjamin has worked at Texas Utilities as a distribution engineer and at the Public Service Co. John worked at Public Service Co of New Mexico and Plains Electric G&T Cooperative as a substation. Publications include research centered on composite insulators, the CERTS Microgrid and future work dealing

Hiskens, Ian A.

370

This document is a preprint of the final paper: Savaghebi, M.; Jalilian, A.; Vasquez, J. C.; Guerrero, J. M.; , "Secondary Control for Voltage Quality Enhancement in Microgrids," Smart Grid, IEEE Transactions on , vol.3, no.4, pp.1893-1902, Dec. 2012. doi  

E-Print Network (OSTI)

.; Guerrero, J. M.; , "Secondary Control for Voltage Quality Enhancement in Microgrids," Smart Grid, IEEE for enhancement of Sensitive Load Bus (SLB) voltage quality in microgrids. The control structure consists control scheme. Index Terms--Distributed Generator (DG), microgrid, voltage harmonics, voltage unbalance

Vasquez, Juan Carlos

371

Decoding the `Nature Encoded' Messages for Distributed Energy Generation Control in Microgrid  

E-Print Network (OSTI)

The communication for the control of distributed energy generation (DEG) in microgrid is discussed. Due to the requirement of realtime transmission, weak or no explicit channel coding is used for the message of system state. To protect the reliability of the uncoded or weakly encoded messages, the system dynamics are considered as a `nature encoding' similar to convolution code, due to its redundancy in time. For systems with or without explicit channel coding, two decoding procedures based on Kalman filtering and Pearl's Belief Propagation, in a similar manner to Turbo processing in traditional data communication systems, are proposed. Numerical simulations have demonstrated the validity of the schemes, using a linear model of electric generator dynamic system.

Gong, Shuping; Lai, Lifeng; Qiu, Robert C

2010-01-01T23:59:59.000Z

372

On-chip COMA cache-coherence protocol for microgrids of microthreaded cores  

E-Print Network (OSTI)

This paper describes an on-chip COMA cache coherency protocol to support the microthread model of concurrent program composition. The model gives a sound basis for building multi-core computers as it captures concurrency, abstracts communication and identifies resources, such as processor groups explicitly and where mapping and scheduling is performed dynamically. The result is a model where binary compatibility is guaranteed over arbitrary numbers of cores and where backward binary compatibility is also assured. We present the design of a memory system with relaxed synchronisation and consistency constraints that matches the characteristics of this model. We exploit an on-chip COMA organisation, which provides a flexible and transparent partitioning between processors and memory. This paper describes the coherency protocol and consistency model and describes work undertaken on the validation of the model and the development of a co-simulator to the Microgrid CMP emulator. 1

Li Zhang; Chris Jesshope

2007-01-01T23:59:59.000Z

373

Enhanced photocatalytic activity of Ag microgrid connected TiO{sub 2} nanocrystalline films  

SciTech Connect

One reason for the high degree of photogenerated carrier recombination was found to be the charge accumulation caused by the uneven reaction area on the photocatalyst surface. The authors connected TiO{sub 2} nanoparticles with conducting Ag microgrid. Obvious photocatalytic activity improvement (81%) over the pure TiO{sub 2} was observed, which is attributed to the electron-hole pairs separation by the metal-semiconductor contact and the large specific area of metal grid, which increased the O{sub 2} absorption and transported the electrons to the sites needed for the deoxidize reactions. This structure lowers the electron accumulation on the particles and improves the utilization ratio of the photoexcited carriers.

Pan Feng; Zhang Junying; Zhang Weiwei; Wang Tianmin; Cai Chao [Center of Materials Physics and Chemistry, Beihang University, Beijing 100083 (China)

2007-03-19T23:59:59.000Z

374

A Green Prison: The Santa Rita Jail Campus Microgrid Chris Marnay, Nicholas DeForest, and Judy Lai  

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

A Green Prison: A Green Prison: The Santa Rita Jail Campus Microgrid Chris Marnay, Nicholas DeForest, and Judy Lai Environmental Energy Technologies Division January 22, 2012 http://eetd.lbl.gov/EA/EMP/emp-pubs.html presented in the Campus Microgrids Panel, 2012 IEEE PES General Meeting 22-26 Jul 2012, San Diego, CA USA This work described in this paper was funded by the Office of Electricity Delivery and Energy Reliability, Distribution System Integration Program of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. It also builds on work previously supported by the Consortium for Electric Reliability Technology Solutions with funding provided by the California Energy Commission, Public Interest Energy Research Program, under Work for Others

375

Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States  

Science Conference Proceedings (OSTI)

Berkeley Lab has for several years been developing methods for selection of optimal microgrid systems, especially for commercial building applications, and applying these methods in the Distributed Energy Resources Customer Adoption Model (DER-CAM). This project began with 3 major goals: (1) to conduct detailed analysis to find the optimal equipment combination for microgrids at a few promising commercial building hosts in the two favorable markets of California and New York, (2) to extend the analysis capability of DER-CAM to include both heat and electricity storage, and (3) to make an initial effort towards adding consideration of power quality and reliability (PQR) to the capabilities of DER-CAM. All of these objectives have been pursued via analysis of the attractiveness of a Consortium for Electric Reliability Technology Solutions (CERTS) Microgrid consisting of multiple nameplate 100 kW Tecogen Premium Power Modules (CM-100). This unit consists of an asynchronous inverter-based variable speed internal combustion engine genset with combined heat and power (CHP) and power surge capability. The essence of CERTS Microgrid technology is that smarts added to the on-board power electronics of any microgrid device enables stable and safe islanded operation without the need for complex fast supervisory controls. This approach allows plug and play development of a microgrid that can potentially provide high PQR with a minimum of specialized site-specific engineering. A notable feature of the CM-100 is its time-limited surge rating of 125 kW, and DER-CAM capability to model this feature was also a necessary model enhancement.

Stadler, Michael; Marnay, Chris; Siddiqui, Afzal; Lai, Judy; Coffey, Brian; Aki, Hirohisa

2009-03-10T23:59:59.000Z

376

An improved control method of power electronic converters in low voltage micro-grid Xiaofeng, Sun ; Qingqiu, Lv ; Yanjun, Tian ; Chen, Zhe  

E-Print Network (OSTI)

when micro-grid transferring between grid-connected mode and island mode. The paper analysis the micro modes. The new droop control method has been validated through simulations by PSCAD software generation (DG) technology [1-3]. DG units may be located in distribution network or on the local load side

Chen, Zhe

377

A framework for real-time power management of a grid-tied microgrid to extend battery lifetime and reduce cost of energy  

Science Conference Proceedings (OSTI)

Because of different technical and economical concerns, battery is happened to be an inevitable part of a microgrid as well as the most expensive component. This fact brings up the necessity of a real-time power management to guarantee the maximum possible ...

S. A. Pourmousavi; Ratnesh K. Sharma; Babak Asghari

2012-01-01T23:59:59.000Z

378

Using MIDI to modify video game content  

Science Conference Proceedings (OSTI)

This paper discusses the concept of using background music to control video game parameters and thus actions on the screen. Each song selected by the player makes the game look different and behave variedly. The concept is explored by modifying an existing ... Keywords: MIDI, MIDI-controlled games, background music reactive games, games, music, musically controlled games, rhythm games, virtual sequencer

Jukka Holm; Juha Arrasvuori; Kai Havukainen

2006-06-01T23:59:59.000Z

379

Effects of a carbon tax on combined heat and power adoption by a microgrid  

DOE Green Energy (OSTI)

This paper describes the economically optimal adoption and operation of distributed energy resources (DER) by a hypothetical California microgrid ((mu)Grid) consisting of a group of commercial buildings over an historic test year, 1999. The optimization is conducted using a customer adoption model (DER-CAM) developed at Berkeley Lab and implemented in the General Algebraic Modeling System (GAMS). A (mu)Grid is a semiautonomous grouping of electricity and heat loads interconnected to the existing utility grid (macrogrid) but able to island from it. The (mu)Grid minimizes the cost of meeting its energy requirements (consisting of both electricity and heat loads) by optimizing the installation and operation of DER technologies while purchasing residual energy from the local combined natural gas and electricity utility. The available DER technologies are small-scale generators (< 500 kW), such as reciprocating engines, microturbines, and fuel cells, with or without CHP equipment, such as water- and space-heating and/or absorption cooling. By introducing a tax on carbon emissions, it is shown that if the (mu)Grid is allowed to install CHP-enabled DER technologies, its carbon emissions are mitigated more than without CHP, demonstrating the potential benefits of small-scale CHP technology for climate change mitigation. Reciprocating engines with heat recovery and/or absorption cooling tend to be attractive technologies for the mild southern California climate, but the carbon mitigation tends to be modest compared to purchasing utility electricity because of the predominance of relatively clean generation in California.

Marnay, Chris; Edwards, Jennifer L.; Firestone, Ryan M.; Ghosh, Srijay; Siddidqui, Afzal S.; Stadler, Michael

2002-10-01T23:59:59.000Z

380

/select/modify/life  

Science Conference Proceedings (OSTI)

... OOF: Finite Element Analysis of Microstructures. Table of Contents, /select/modify/life, OOF home. Prev, ... select/modify/life. /select ...

2013-08-23T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Ad-Hoc Self-Organized Microgrid for Rural Electrification and Post-disaster Response  

Science Conference Proceedings (OSTI)

This paper presents the concept for an ad-hoc self-organized micro grid based on moveable and renewable energy sources and fully distributed coordination between intelligent power routing nodes. The primary goal of the proposed architecture is to build ... Keywords: Smart Grid, Self-Organization, Ad-hoc Network

Amos Brocco

2013-04-01T23:59:59.000Z

382

The Added Economic and Environmental Value of Solar Thermal Systems in Microgrids with CombinedHeat and Power  

Science Conference Proceedings (OSTI)

The addition of solar thermal and heat storage systems can improve the economic, as well as environmental attraction of micro-generation systems, e.g. fuel cells with or without combined heat and power (CHP) and contribute to enhanced CO2 reduction. However, the interactions between solar thermal collection and storage systems and CHP systems can be complex, depending on the tariff structure, load profile, etc. In order to examine the impact of solar thermal and heat storage on CO2 emissions and annual energy costs, a microgrid's distributed energy resources (DER) adoption problem is formulated as a mixed-integer linear program. The objective is minimization of annual energy costs. This paper focuses on analysis of the optimal interaction of solar thermal systems, which can be used for domestic hot water, space heating and/or cooling, and micro-CHP systems in the California service territory of San Diego Gas and Electric (SDG&E). Contrary to typical expectations, our results indicate that despite the high solar radiation in southern California, fossil based CHP units are dominant, even with forecast 2020 technology and costs. A CO2 pricing scheme would be needed to incent installation of combined solar thermal absorption chiller systems, and no heat storage systems are adopted. This research also shows that photovoltaic (PV) arrays are favored by CO2 pricing more than solar thermal adoption.

Marnay, Chris; Stadler, Michael; Cardoso, Goncalo; Megel, Olivier; Lai, Judy; Siddiqui, Afzal

2009-08-15T23:59:59.000Z

383

Concept search in Urdu  

Science Conference Proceedings (OSTI)

This paper describes a thesis proposal to do concept search in non English and non European languages. Urdu is chosen as an example language because of its unique nature, morphology and a large number of speakers. Besides its importance, Urdu does not ... Keywords: concept search, evaluation, stemming, urdu

Kashif Riaz

2008-10-01T23:59:59.000Z

384

Annotating Concept Mention Patterns  

E-Print Network (OSTI)

This paper presents an annotation project aimed at elicitation of concept interconnections within people's common knowledge. Motivation, annotation scheme and relevant previous work are discussed and some potential applications are suggested.

Beata Beigman Klebanov

2005-01-01T23:59:59.000Z

385

Common tester platform concept.  

Science Conference Proceedings (OSTI)

This report summarizes the results of a case study on the doctrine of a common tester platform, a concept of a standardized platform that can be applicable across the broad spectrum of testing requirements throughout the various stages of a weapons program, as well as across the various weapons programs. The common tester concept strives to define an affordable, next-generation design that will meet testing requirements with the flexibility to grow and expand; supporting the initial development stages of a weapons program through to the final production and surveillance stages. This report discusses a concept investing key leveraging technologies and operational concepts combined with prototype tester-development experiences and practical lessons learned gleaned from past weapons programs.

Hurst, Michael James

2008-05-01T23:59:59.000Z

386

Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States  

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

1334E-2009 1334E-2009 Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States Michael Stadler, Chris Marnay, Afzal Siddiqui, Judy Lai, Brian Coffey, and Hirohisa Aki Environmental Energy Technologies Division Revised March 2009 http://eetd.lbl.gov/EA/EMP/emp-pubs.html The work described in this paper was funded by the Office of Electricity Delivery and Energy Reliability, Renewable and Distributed Systems Integration Program in the U.S. Department of Energy under Contract No. DE-AC02- 05CH11231. ERNEST ORLANDO LAWRENCE BERKELEY NATIONAL LABORATORY Disclaimer This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct

387

Effect of Heat and Electricity Storage and Reliability on Microgrid Viability:A Study of Commercial Buildings in California and New York States  

Science Conference Proceedings (OSTI)

In past work, Berkeley Lab has developed the Distributed Energy Resources Customer Adoption Model (DER-CAM). Given end-use energy details for a facility, a description of its economic environment and a menu of available equipment, DER-CAM finds the optimal investment portfolio and its operating schedule which together minimize the cost of meeting site service, e.g., cooling, heating, requirements. Past studies have considered combined heat and power (CHP) technologies. Methods and software have been developed to solve this problem, finding optimal solutions which take simultaneity into account. This project aims to extend on those prior capabilities in two key dimensions. In this research storage technologies have been added as well as power quality and reliability (PQR) features that provide the ability to value the additional indirect reliability benefit derived from Consortium for Electricity Reliability Technology Solutions (CERTS) Microgrid capability. This project is intended to determine how attractive on-site generation becomes to a medium-sized commercial site if economical storage (both electrical and thermal), CHP opportunities, and PQR benefits are provided in addition to avoiding electricity purchases. On-site electrical storage, generators, and the ability to seamlessly connect and disconnect from utility service would provide the facility with ride-through capability for minor grid disturbances. Three building types in both California and New York are assumed to have a share of their sensitive electrical load separable. Providing enhanced service to this load fraction has an unknown value to the facility, which is estimated analytically. In summary, this project began with 3 major goals: (1) to conduct detailed analysis to find the optimal equipment combination for microgrids at a few promising commercial building hosts in the two favorable markets of California and New York; (2) to extend the analysis capability of DER-CAM to include both heat and electricity storage; and (3) to make an initial effort towards adding consideration of PQR into the capabilities of DER-CAM.

Stadler, Michael; Marnay, Chris; Siddiqui, Afzal; Lai, Judy; Coffey, Brian; Aki, Hirohisa

2008-12-01T23:59:59.000Z

388

MODIFIED ZONE METHOD CALCULATOR  

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

Zone Method is recommended for R-value calculations in steel stud walls by the 1997 ASHRAE Handbook of Fundamentals ASHRAE 1997. The Modified Zone Method is similar to the...

389

Separations innovative concepts: Project summary  

Science Conference Proceedings (OSTI)

This project summary includes the results of 10 innovations that were funded under the US Department's Innovative Concept Programs. The concepts address innovations that can substantially reduce the energy used in industrial separations. Each paper describes the proposed concept, and discusses the concept's potential energy savings, market applications, technical feasibility, prior work and state of the art, and future development needs.

Lee, V.E. (ed.)

1988-05-01T23:59:59.000Z

390

Image search by concept map  

Science Conference Proceedings (OSTI)

In this paper, we present a novel image search system, image search by concept map. This system enables users to indicate not only what semantic concepts are expected to appear but also how these concepts are spatially distributed in the desired ... Keywords: concept map, image search

Hao Xu; Jingdong Wang; Xian-Sheng Hua; Shipeng Li

2010-07-01T23:59:59.000Z

391

Presentation to the EAC - GridWise Architecture Council - Erich...  

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

DER * Electrification of transportation * Opportunities for the application of Microgrids New interoperability concepts, standards and metrics required * Regulatory...

392

Generation -IV Reactor Concepts  

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

Generation-IV Reactor Concepts Generation-IV Reactor Concepts Thomas H. Fanning Argonne National Laboratory 9700 South Cass Avenue Argonne, Illinois 60439, USA The Generation-IV International Forum (GIF) is a multi-national research and development (R&D) collaboration. The GIF pursues the development of advanced, next generation reactor technology with goals to improve: a) sustainability (effective fuel utilization and minimization of waste) b) economics (competitiveness with respect to other energy sources) c) safety and reliability (e.g., no need for offsite emergency response), and d) proliferation resistance and physical protection The GIF Technology Roadmap exercise selected six generic systems for further study: the Gas- cooled Fast Reactor (GFR), the Lead-cooled Fast Reactor (LFR), the Molten Salt Reactor (MSR),

393

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

. Eto, Principal Investigator Berkeley, CA 94720 Ed Linton, Northern Power Systems Commission Contract conditions (Sheet 17) G1 500A 250A To Sheet 2 2 TB12 FD10 Ground Network G1 Optional Utility Transformer

394

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

-up. The unit generates power in a stand-alone mode (no grid-tie) and is connected to a load bank. The output of the inverter is connected to the Delta side of a transformer in a 3-wire configuration. The output of the transformer is wired to the load bank in a 4-wire configuration with a 25-yard loop. The inverter is also

395

Building Scale DC Microgrids  

E-Print Network (OSTI)

a 10 kW vertical axis wind turbine, and Fig. 4 shows one ofgrid Fig. 3. Vertical axis wind turbine in the AIT DC µgrid

Marnay, Chris

2013-01-01T23:59:59.000Z

396

Microgrid with distributed generators.  

E-Print Network (OSTI)

??The principal aim of this project is to study the energy production by solar energy system in close to the consumers and integrated into a… (more)

Yii, See Mee

2009-01-01T23:59:59.000Z

397

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network (OSTI)

://www.doe.gov/bridge Available to the public from U.S. Department of Commerce National Technical Information Service 5285 Port for public release; further dissemination unlimited. #12;2 Issued by Sandia National Laboratories, operated commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does

398

Building Scale DC Microgrids  

E-Print Network (OSTI)

an increasingly familiar generation source and elec- tronicssource of ancillary services either to buffer local variable generation,sources, e.g. photovoltaic modules (PV), from other direct current (DC) generation,

Marnay, Chris

2013-01-01T23:59:59.000Z

399

Advanced Concepts Breakout Group  

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

Workshop Workshop Advanced Concepts Working Group Facilitator: John J. Petrovic Scribe: Sherry Marin Advanced Storage Techniques/ Approaches in Priority Order 1. Crystalline Nanoporous Materials (15) 2. Polymer Microspheres (12) Self-Assembled Nanocomposites (12) 3. Advanced Hydrides (11) Metals - Organic (11) 4. BN Nanotubes (5) Hydrogenated Amorphous Carbon (5) 5. Mesoporous materials (4) Bulk Amorphous Materials (BAMs) (4) 6. Iron Hydrolysis (3) 7. Nanosize powders (2) 8. Metallic Hydrogen (1) Hydride Alcoholysis (1) Overarching R&D Questions for All Advanced Materials * Maximum storage capacity - theoretical model * Energy balance / life cycle analysis * Hydrogen absorption / desorption kinetics * Preliminary cost analysis - potential for low cost, high

400

Concept Discovery from Text  

E-Print Network (OSTI)

WordNet are extremely useful. However, they often include many rare senses while missing domain-specific senses. We present a clustering algorithm called CBC (Clustering By Committee) that automatically discovers concepts from text. It initially discovers a set of tight clusters called committees that are well scattered in the similarity space. The centroid of the members of a committee is used as the feature vector of the cluster. We proceed by assigning elements to their most similar cluster. Evaluating cluster quality has always been a difficult task. We present a new evaluation methodology that is based on the editing distance between output clusters and classes extracted from WordNet (the answer key). Our experiments show that CBC outperforms several well-known clustering algorithms in cluster quality.

Dekang Lin; Patrick Pantel

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

College Students‘ GIS Spatial Concept Knowledge Assessed by Concept Maps  

E-Print Network (OSTI)

The development of spatial thinking proficiency has been increasingly demanded in Geographic Information System (GIS) education. Despite this educational trend, there is little empirical research on college students' spatial concept knowledge, which critically affects the quality of spatial thinking. This study addressed the following three research questions: 1) What differences exist between students' understandings of spatial concepts at the beginning, middle, and end of an introductory-level GIS course?, 2) What spatial misconceptions students may possess while taking an introductory-level GIS course?, and 3) Which spatial concepts are easy or hard for undergraduate students to understand? The researcher asked twelve participants who were taking an introductory-level GIS course to create concept maps about space and revised their concept maps in three experiment sessions. For the first question, the researcher scored the sixty obtained concept maps and statistically analyzed those scores to examine if there is any significant difference among the scores of the three experiment sessions. For the second question, the researcher examined participants' misconceptions by analyzing the incorrect statements of distortion, map projection, and scale. For the third question, the researcher statistically analyzed concept-based scores to examine if there is any significant difference among the scores of three different complexity levels. A main finding for the first question was that there was a significant difference among the scores of the concept maps created in the first session and the scores of the concept maps revised in the second and third sessions. This implied that participants could successfully revise their own original concept maps in the middle of a semester. The result of the study of the second question indicated that a half of participants misunderstood the concepts of map projections and scale. This result suggested that some undergraduate students may have difficulty shifting from scientifically inappropriate spatial concept knowledge to appropriate knowledge. Analysis of the third question resulted that the concept-based scores of simple spatial concepts are significantly higher than the scores of complicated spatial concepts. This result inferred that participants' scores decreased as the complexity of the concepts increased.

Oda, Katsuhiko

2011-05-01T23:59:59.000Z

402

The added economic and environmental value of plug-in electric vehicles connected to commercial  

E-Print Network (OSTI)

, miscellaneous services and public administration (whenever the buildings are not federally owned) 7 Maisy ..............................................................................................................................1 1.1 Microgrid Concept in microgrids. These clusters could operate semi-autonomously from the established power system, or macrogrid

403

Modified clay sorbents  

DOE Patents (OSTI)

A novel modified clay sorbent and method of treating industrial effluents to remove trace pollutants, such as dioxins, biphenyls, and polyaromatics such as benzo(a)pyrene and pentachlorophenol. The novel clay sorbent has a composite structure in which the interlayer space of an expandable clay, such as smectite, is filled with polyvalent or multivalent inorganic cations which forces weaker surfactant cations to locate on the surface of the clay in such an orientation that the resulting composite is hydrophilic in nature. A specific example is cetylpyridinium-hydroxy aluminum-montmorillonite. In certain embodiments, a non-expanding clay, such as kaolinite, is used and surfactant cations are necessarily located on an external surface of the clay. A specific example is cetylpyridinium-kaolinite.

Fogler, H. Scott (Ann Arbor, MI); Srinivasan, Keeran R. (Livonia, MI)

1990-01-01T23:59:59.000Z

404

Re-evaluation of monitored retrievable storage concepts  

SciTech Connect

In 1983, as a prelude to the monitored retrievable storage (MRS) facility conceptual design, the Pacific Northwest Laboratory (PNL) conducted an evaluation for the US Department of Energy (DOE) that examined alternative concepts for storing spent LWR fuel and high- level wastes from fuel reprocessing. The evaluation was made considering nine concepts for dry away-from-reactor storage. The nine concepts evaluated were: concrete storage cask, tunnel drywell, concrete cask-in-trench, open-cycle vault, metal casks (transportable and stationary), closed-cycle vault, field drywell, and tunnel-rack vault. The purpose and scope of the re-evaluation did not require a repetition of the expert-based examinations used earlier. Instead, it was based on more detailed technical review by a small group, focusing on changes that had occurred since the initial evaluation was made. Two additional storage concepts--the water pool and the horizontal modular storage vault (NUHOMS system)--were ranked along with the original nine. The original nine concepts and the added two conceptual designs were modified as appropriate for a scenario with storage capacity for 15,000 MTU of spent fuel. Costs, area requirements, and technical and historical data pertaining to MRS storage were updated for each concept.

Fletcher, J.F.; Smith, R.I.

1989-04-01T23:59:59.000Z

405

New probe of modified gravity  

E-Print Network (OSTI)

We suggest a new efficient way to constrain a certain class of large scale modifications of gravity. We show that the scale-free relation between density and size of Dark Matter halos, predicted within the LambdaCDM model with Newtonian gravity, gets modified in a wide class of theories of modified gravity.

Boyarsky, Alexey

2010-01-01T23:59:59.000Z

406

Promethus Hot Leg Piping Concept  

SciTech Connect

The Naval Reactors Prime Contractor Team (NRPCT) recommended the development of a gas cooled reactor directly coupled to a Brayton energy conversion system as the Space Nuclear Power Plant (SNPP) for NASA's Project Prometheus. The section of piping between the reactor outlet and turbine inlet, designated as the hot leg piping, required unique design features to allow the use of a nickel superalloy rather than a refractory metal as the pressure boundary. The NRPCT evaluated a variety of hot leg piping concepts for performance relative to SNPP system parameters, manufacturability, material considerations, and comparison to past high temperature gas reactor (HTGR) practice. Manufacturability challenges and the impact of pressure drop and turbine entrance temperature reduction on cycle efficiency were discriminators between the piping concepts. This paper summarizes the NRPCT hot leg piping evaluation, presents the concept recommended, and summarizes developmental issues for the recommended concept.

AM Girbik; PA Dilorenzo

2006-01-24T23:59:59.000Z

407

Identifying Student Concepts of Gravity.  

E-Print Network (OSTI)

??This paper discusses a survey developed to investigate student concepts of "gravity" among AST 109 astronomy students and pre-service K-12 teachers. Survey questions were developed… (more)

Feeley, Roger Eastman

2007-01-01T23:59:59.000Z

408

Contingency structures and concept analysis  

Science Conference Proceedings (OSTI)

Formal Concept Analysis has found many uses in knowledge representation and data mining, but its penetration into established data-based research disciplines has been slower. Marrying application motivations, structures, and methods from epidemiology ...

Alex Pogel; David Ozonoff

2008-02-01T23:59:59.000Z

409

Unification of Concept Terms --Extended Abstract --  

E-Print Network (OSTI)

Unification of Concept Terms -- Extended Abstract -- Franz Baader \\Lambda LuFg Theoretical Computer of the domain can be described by concept terms, i.e., expressions that are built from atomic concepts (unary. The atomic concepts and concept terms represent sets of individuals, whereas roles represent binary relations

Baader, Franz

410

U.S. Smart Grid Finding new ways to cut carbon  

E-Print Network (OSTI)

distributed energy sources ·Reduce distribution losses ·Create micro-grids Smart power Utilities can optimize://www.recycled- energy.com/ #12;U.S. Smart Grid 11 An area with further potential is the concept of microgrids. Hospitals their own backup power. In a stand-alone microgrid, several decentralized power sources in a region

Zhou, Pei

411

Role of Micro Sources within Micro Grid  

Science Conference Proceedings (OSTI)

Microgrid is a grid which helps to provide the generation in case of Grid failure. Microgrid is a new concept in the arena of green power generation, which is substantially attracting many researchers' interest due to its potential to extend the applications ... Keywords: Microgrid, Modeling, Non conventional Energy Sources, Renewable generation

Sandeep A. Kale; P. P. Jagtap; J. B. Helonde

2011-11-01T23:59:59.000Z

412

Structure formation in modified gravity  

Science Conference Proceedings (OSTI)

We pursue a (1+3) ?covariant analysis of cosmological peculiar velocity of pressure?free matter induced by the matter density perturbations in modified f(R) gravity theories. Instead of working in a quasi?Newtonian Eulerian frame

D. M. Solomons; P. K. S. Dunsby; S. Carloni

2009-01-01T23:59:59.000Z

413

Designing Self-Modifying Agents  

E-Print Network (OSTI)

Agents need to be able to adapt to changes in their environment. One way to achieve this, is to provide agents with the ability of self-modification. Self-modification requires reflection and strategies with which new knowledge can be acquired, a necessary condition for creativity. This paper describes a knowledge-level model for the design of self-modifying agents and explores the feasibility of automatically designing self-modifying agents.

Frances M.T. Brazier; Frances M. T; Brazier; Niek J. E. Wijngaards

2001-01-01T23:59:59.000Z

414

Energy Concepts | Open Energy Information  

Open Energy Info (EERE)

Concepts Concepts Facility Energy Concepts Sector Wind energy Facility Type Small Scale Wind Facility Status In Service Location Hudson WI Coordinates 44.942933°, -92.701608° 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":44.942933,"lon":-92.701608,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

415

The European Passive House Concept  

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

The European Passive House Concept The European Passive House Concept Speaker(s): Nabih Tahan Date: January 13, 2009 - 12:00pm Location: 90-3122 Nabih will describe the European Passive House concept and modern, home manufacturing methods in Austria. The Passive House is a European standard for a specific way to build a house that consumes very little energy, is comfortable and has a high indoor air quality. It is a cost effective method of building, where conventional heating systems are eliminated, and their cost is reinvested in super insulation, super air-tightness and heat recovery. Free heat generated from electrical and gas appliances and lighting is recycled through the heat recovery ventilator. This results in buildings that consume 80% to 90% less heating energy while constantly

416

Analysis of advanced compressed air energy storage concepts. [Adiabatic concept  

DOE Green Energy (OSTI)

An analysis is presented of a class of Advanced Compressed Air Energy Storage (CAES) concepts, which are designed to minimize or eliminate the dependence on oil for firing the turbines. The analysis is based on a ''Hybrid'' CAES system that incorporates thermal storage and varying turbine inlet conditions. The extreme case of the hybrid is the adiabatic CAES concept where the sole source of energy to the cycle is the electrical power input to the compressors. The thermodynamic characteristics of these cycles are studied parametrically. In addition, the economics of the hybrid cycle, including the adiabatic cycle, are studied parametrically for the case where thermal storage in an aquifer is used. The results of the analysis conclude that the adiabatic CAES concept is technically feasible and that the storage efficiency would be comparable to or better than pumped hydro. However, the economic analysis concludes that heat storage in an aquifer is of questionable economic value since a recuperator can accomplish much the same effects at lower cost. The adiabatic concept using heat storage in an aquifer does not appear economic for foreseeable conditions.

Kreid, D.

1977-10-01T23:59:59.000Z

417

Concept  

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

Design Argonne is home to the Advanced Photon Source (APS) user facility, which provides open access to scientific users from universities, national labs, and industry across the...

418

An Amplifier Concept for Spintronics  

SciTech Connect

Typical spin-dependent devices proposed for information processing lack one of the most important features provided by charge based logic: they do not provide gain. In this letter we show the basic concept of a spin amplifier and propose ways to amplify a spin current at room temperature.

Acremann, Y.; Yu, X.W.; Tulapurkar, A.A.; Scherz, A.; Chembrolu, V.; Katine, J.A.; Carey, M.J.; Siegmann, H.C.; Stohr, J.

2009-05-11T23:59:59.000Z

419

A conception for creating a system of parametric design of parallel algorithms and their software implementations  

Science Conference Proceedings (OSTI)

A conception is proposed for the creation of a system for parametric design of parallel algorithms. The following functional components of the system are described: transformation of SAA-M schemes, program synthesis, and execution and statistics gathering. ... Keywords: Java Multithreading, SAA-M scheme, algorithm, flow, formalization, modified system of algorithmic algebras, paradigm of parallel programming, parallelism, process

S. D. Pogorilyy; I. Yu. Shkulipa

2009-11-01T23:59:59.000Z

420

(Missing) concept discovery in heterogeneous information networks  

Science Conference Proceedings (OSTI)

This article proposes a new approach to extract existing (or detect missing) concepts from a loosely integrated collection of information units by means of concept graph detection. Thereby a concept graph defines a concept by a quasi bipartite sub-graph ...

Tobias Kötter; Michael R. Berthold

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

? Disposal concepts (“enclosed”): crystalline, clay/shale,  

E-Print Network (OSTI)

salt, deep borehole (Re: January, 2012 briefing) ? Thermal analysis for mined, “enclosed ” concepts ? Finite element analysis for generic salt repository (waste package size up to 32-PWR) ? “Open ” disposal concept development: shale unbackfilled, sedimentary backfilled, and hard-rock unsaturated (waste package sizes up to 32-PWR) ? Thermal analysis for mined, “open ” concepts ? Cost estimation for 5 disposal concepts ? Summary and conclusions

Ernest Hardin (snl; Jim Blink; Harris Greenberg (llnl; Joe Carter (srnl; Rob Howard (ornl

2012-01-01T23:59:59.000Z

422

Transportation System Concept of Operations  

Science Conference Proceedings (OSTI)

The Nuclear Waste Policy Act of 1982 (NWPA), as amended, authorized the DOE to develop and manage a Federal system for the disposal of SNF and HLW. OCRWM was created to manage acceptance and disposal of SNF and HLW in a manner that protects public health, safety, and the environment; enhances national and energy security; and merits public confidence. This responsibility includes managing the transportation of SNF and HLW from origin sites to the Repository for disposal. The Transportation System Concept of Operations is the core high-level OCRWM document written to describe the Transportation System integrated design and present the vision, mission, and goals for Transportation System operations. By defining the functions, processes, and critical interfaces of this system early in the system development phase, programmatic risks are minimized, system costs are contained, and system operations are better managed, safer, and more secure. This document also facilitates discussions and understanding among parties responsible for the design, development, and operation of the Transportation System. Such understanding is important for the timely development of system requirements and identification of system interfaces. Information provided in the Transportation System Concept of Operations includes: the functions and key components of the Transportation System; system component interactions; flows of information within the system; the general operating sequences; and the internal and external factors affecting transportation operations. The Transportation System Concept of Operations reflects OCRWM's overall waste management system policies and mission objectives, and as such provides a description of the preferred state of system operation. The description of general Transportation System operating functions in the Transportation System Concept of Operations is the first step in the OCRWM systems engineering process, establishing the starting point for the lower level descriptions. of subsystems and components, and the Transportation System Requirements Document. Other program and system documents, plans, instructions, and detailed designs will be consistent with and informed by the Transportation System Concept of Operations. The Transportation System Concept of Operations is a living document, enduring throughout the OCRWM systems engineering lifecycle. It will undergo formal approval and controlled revisions as appropriate while the Transportation System matures. Revisions will take into account new policy decisions, new information available through system modeling, engineering investigations, technical analyses and tests, and the introduction of new technologies that can demonstrably improve system performance.

N. Slater-Thompson

2006-08-16T23:59:59.000Z

423

A MODIFIED LUNDEGARDH SPRAY CHAMBER  

SciTech Connect

Operation of an apparatus for analysis of solutions by the Lundegardh flame technique was greatiy facilituted by the modification of a spray chamber. Samples can be introduced and removed from the modified spray chamber without extinguishing the flame or dismantling the assembly. (auth)

Palin, P.C.

1951-04-01T23:59:59.000Z

424

CIRCULATING MOVING BED COMBUSTION PROOF OF CONCEPT  

Science Conference Proceedings (OSTI)

Circulating Moving Bed (CMB) combustion technology has its roots in traditional circulating fluidized bed technology and involves a novel method of solid fuel combustion and heat transfer. CMB technology represents a step change in improved performance and cost relative to conventional PC and FBC boilers. The CMB heat exchanger preheats the energy cycle working fluid, steam or air, to the high temperature levels required in systems for advanced power generation. Unique features of the CMB are the reduction of the heat transfer surfaces by about 60% as a result of the enhanced heat transfer rates, flexibility of operation, and about 30% lower cost over existing technology. The CMB Phase I project ran from July 2001 through March 2003. Its objective was to continue development of the CMB technology with a series of proof of concept tests. The tests were conducted at a scale that provided design data for scale up to a demonstration plant. These objectives were met by conducting a series of experiments in ALSTOM Power’s Multi-use Test Facility (MTF). The MTF was modified to operate under CMB conditions of commercial interest. The objective of the tests were to evaluate gas-to-solids heat transfer in the upper furnace, assess agglomeration in the high temperature CMB bubbling bed, and evaluate solids-to-tube heat transfer in the moving bed heat exchanger. The Phase I program results showed that there are still some significant technical uncertainties that needed to be resolved before the technology can be confidently scaled up for a successful demonstration plant design. Work remained in three primary areas: • scale up of gas to solid heat transfer • high temperature finned surface design • the overall requirements of mechanical and process design. The CMB Phase II workscope built upon the results of Phase I and specifically addressed the remaining technical uncertainties. It included a scaled MTF heat transfer test to provide the necessary data to scale up gas-to-solids heat transfer. A stress test rig was built and tested to provide validation data for a stress model needed to support high temperature finned surface design. Additional cold flow model tests and MTF tests were conducted to address mechanical and process design issues. This information was then used to design and cost a commercial CMB design concept. Finally, the MBHE was reconfigured into a slice arrangement and tested for an extended duration at a commercial CFB plant.

Jukkola, Glen

2010-06-30T23:59:59.000Z

425

Generic repository design concepts and thermal analysis (FY11).  

SciTech Connect

Reference concepts for geologic disposal of used nuclear fuel and high-level radioactive waste in the U.S. are developed, including geologic settings and engineered barriers. Repository thermal analysis is demonstrated for a range of waste types from projected future, advanced nuclear fuel cycles. The results show significant differences among geologic media considered (clay/shale, crystalline rock, salt), and also that waste package size and waste loading must be limited to meet targeted maximum temperature values. In this study, the UFD R&D Campaign has developed a set of reference geologic disposal concepts for a range of waste types that could potentially be generated in advanced nuclear FCs. A disposal concept consists of three components: waste inventory, geologic setting, and concept of operations. Mature repository concepts have been developed in other countries for disposal of spent LWR fuel and HLW from reprocessing UNF, and these serve as starting points for developing this set. Additional design details and EBS concepts will be considered as the reference disposal concepts evolve. The waste inventory considered in this study includes: (1) direct disposal of SNF from the LWR fleet, including Gen III+ advanced LWRs being developed through the Nuclear Power 2010 Program, operating in a once-through cycle; (2) waste generated from reprocessing of LWR UOX UNF to recover U and Pu, and subsequent direct disposal of used Pu-MOX fuel (also used in LWRs) in a modified-open cycle; and (3) waste generated by continuous recycling of metal fuel from fast reactors operating in a TRU burner configuration, with additional TRU material input supplied from reprocessing of LWR UOX fuel. The geologic setting provides the natural barriers, and establishes the boundary conditions for performance of engineered barriers. The composition and physical properties of the host medium dictate design and construction approaches, and determine hydrologic and thermal responses of the disposal system. Clay/shale, salt, and crystalline rock media are selected as the basis for reference mined geologic disposal concepts in this study, consistent with advanced international repository programs, and previous investigations in the U.S. The U.S. pursued deep geologic disposal programs in crystalline rock, shale, salt, and volcanic rock in the years leading up to the Nuclear Waste Policy Act, or NWPA (Rechard et al. 2011). The 1987 NWPA amendment act focused the U.S. program on unsaturated, volcanic rock at the Yucca Mountain site, culminating in the 2008 license application. Additional work on unsaturated, crystalline rock settings (e.g., volcanic tuff) is not required to support this generic study. Reference disposal concepts are selected for the media listed above and for deep borehole disposal, drawing from recent work in the U.S. and internationally. The main features of the repository concepts are discussed in Section 4.5 and summarized in Table ES-1. Temperature histories at the waste package surface and a specified distance into the host rock are calculated for combinations of waste types and reference disposal concepts, specifying waste package emplacement modes. Target maximum waste package surface temperatures are identified, enabling a sensitivity study to inform the tradeoff between the quantity of waste per disposal package, and decay storage duration, with respect to peak temperature at the waste package surface. For surface storage duration on the order of 100 years or less, waste package sizes for direct disposal of SNF are effectively limited to 4-PWR configurations (or equivalent size and output). Thermal results are summarized, along with recommendations for follow-on work including adding additional reference concepts, verification and uncertainty analysis for thermal calculations, developing descriptions of surface facilities and other system details, and cost estimation to support system-level evaluations.

Howard, Robert (Oak Ridge National Laboratory, Oak Ridge, TN); Dupont, Mark (Savannah River Nuclear Solutions, Aiken, SC); Blink, James A. (Lawrence Livermore National Laboratory, Livermore, CA); Fratoni, Massimiliano (Lawrence Livermore National Laboratory, Livermore, CA); Greenberg, Harris (Lawrence Livermore National Laboratory, Livermore, CA); Carter, Joe (Savannah River Nuclear Solutions, Aiken, SC); Hardin, Ernest L.; Sutton, Mark A. (Lawrence Livermore National Laboratory, Livermore, CA)

2011-08-01T23:59:59.000Z

426

Summary of Linear Elastic Fracture Mechanics Concepts  

Science Conference Proceedings (OSTI)

...in this Volume."Stress Intensity Factors"A brief summary of linear elastic fracture mechanics (LEFM) concepts

427

Lectures on Screened Modified Gravity  

E-Print Network (OSTI)

The acceleration of the expansion of the Universe has led to the construction of Dark Energy models where a light scalar field may have a range reaching up to cosmological scales. Screening mechanisms allow these models to evade the tight gravitational tests in the solar system and the laboratory. I will briefly review some of the salient features of screened modified gravity models of the chameleon, dilaton or symmetron types using $f(R)$ gravity as a template.

Philippe Brax

2012-11-22T23:59:59.000Z

428

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

of the utility’s electrical power grid; 2) an approach toElectrical and Electronics Engineers Standard 1547 and powertheir electrical integration. In combined-heat-and-power

Eto, Joe

2009-01-01T23:59:59.000Z

429

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

of the utility’s electrical power grid; 2) an approach toElectrical and Electronics Engineers Standard 1547 and powertheir electrical integration. In combined-heat-and-power

ETO, J.

2010-01-01T23:59:59.000Z

430

Energy manager design for microgrids  

E-Print Network (OSTI)

subsequent system energy costs for that time period. Figurethe incremental cost of energy at a given time will not besystem over time, including accumulated energy costs, device

Firestone, Ryan; Marnay, Chris

2005-01-01T23:59:59.000Z

431

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

emerging potential of distributed generation using a systemKeywords: CHP, UPS, distributed generation, intentionalmanagement systems, distributed generation, and modeling

Lasseter, R. H.

2010-01-01T23:59:59.000Z

432

Energy manager design for microgrids  

E-Print Network (OSTI)

the site’s energy usage, utility tariffs, and DER equipmentTOU) energy and demand charges, a dynamic utility tariff,system. Tariff and Regulatory Information If total energy

Firestone, Ryan; Marnay, Chris

2005-01-01T23:59:59.000Z

433

Competitive Microgrid Electricity Market Design.  

E-Print Network (OSTI)

??The electric power grid forms the foundation for several other critical infrastructures of national importance such as public health, transportation and telecommunication systems, to thrive.… (more)

Krovvidi, Sai S

2010-01-01T23:59:59.000Z

434

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

Eto. 2002. Integration of Distributed Energy Resources: Thesite. In this context, distributed energy resources – smallelectric power. The distributed energy resources portfolio

ETO, J.

2010-01-01T23:59:59.000Z

435

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

Paper on Integration of Distributed Energy Resources: Thesite. In this context, distributed energy resources – smallelectric power. The distributed energy resources portfolio

Eto, Joe

2009-01-01T23:59:59.000Z

436

Energy manager design for microgrids  

E-Print Network (OSTI)

M. Stadler. 2003 “Distributed Energy Resources in Practice:Assessment of µGrid Distributed Energy Resource Potential2003. “Gas-Fired Distributed Energy Resource Technology

Firestone, Ryan; Marnay, Chris

2005-01-01T23:59:59.000Z

437

Microgrids: An Overview of Ongoing  

E-Print Network (OSTI)

by a privately owned and operated 31-MW thermal power plant that can also export excess power. Planned islanding Internet Connection WDICS SCADA Diesel Plant PLC Frontier Power Systems Wind Plant System Layout Ramea, NL Nikos Hatziargyrioua , Hiroshi Asanob , Reza Iravanic , and Chris Marnayd a Power Division of the School

438

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

and John Stevens are with Sandia National Laboratories,of the Technical Staff at Sandia National Labs in the Energybefore taking a job with Sandia National Laboratories and

Lasseter, R. H.

2010-01-01T23:59:59.000Z

439

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

power conditioning system which together provide the necessary power and voltage control required for operation

Lasseter, R. H.

2010-01-01T23:59:59.000Z

440

CERTS Microgrid Laboratory Test Bed  

E-Print Network (OSTI)

Test Bed at American Electric Power Figure 2. One-LineH. VOLKOMMER, American Electric Power, USA E. LINTON AND H.and operated by American Electric Power. The testing fully

ETO, J.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Energy manager design for microgrids  

E-Print Network (OSTI)

the month, selects the maximum demand, and multiplies thisthe demand charge module. Maximum demand is defined as theaverage load. This is a maximum demand of 552 kW, and a

Firestone, Ryan; Marnay, Chris

2005-01-01T23:59:59.000Z

442

Energy manager design for microgrids  

E-Print Network (OSTI)

refrigeration, space heating, water heating, and loads that can only be met by combustible Energy Manager Design

Firestone, Ryan; Marnay, Chris

2005-01-01T23:59:59.000Z

443

Energy manager design for microgrids  

E-Print Network (OSTI)

36 Figure 7: Average Load Profile for June On-peakCAM include the site’s five load profiles, tariff structureperformance. The five load profiles are electricity-only (

Firestone, Ryan; Marnay, Chris

2005-01-01T23:59:59.000Z

444

CERTS Microgrid Laboratory Test Bed  

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

projects, and currently performs design and testing of power converters and direct-drive permanent magnet generator technology for wind power products. Jean Roy has a Masters...

445

Energy manager design for microgrids  

E-Print Network (OSTI)

equipment, absorption and adsorption cooling, desiccantabsorption chillers and desiccant dehumidifiers that use heat to reduce electrical cooling

Firestone, Ryan; Marnay, Chris

2005-01-01T23:59:59.000Z

446

Observational Tests of Modified Gravity  

E-Print Network (OSTI)

Modified gravity theories have richer observational consequences for large-scale structure than conventional dark energy models, in that different observables are not described by a single growth factor even in the linear regime. We examine the relationships between perturbations in the metric potentials, density and velocity fields, and discuss strategies for measuring them using gravitational lensing, galaxy cluster abundances, galaxy clustering/dynamics and the ISW effect. We show how a broad class of gravity theories can be tested by combining these probes. A robust way to interpret observations is by constraining two key functions: the ratio of the two metric potentials, and the ratio of the Gravitational ``constant'' in the Poisson equation to Newton's constant. We also discuss quasilinear effects that carry signatures of gravity, such as through induced three-point correlations. Clustering of dark energy can mimic features of modified gravity theories and thus confuse the search for distinct signatures of such theories. It can produce pressure perturbations and anisotropic stresses, which breaks the equality between the two metric potentials even in general relativity. With these two extra degrees of freedom, can a clustered dark energy model mimic modified gravity models in all observational tests? We show with specific examples that observational constraints on both the metric potentials and density perturbations can in principle distinguish modifications of gravity from dark energy models. We compare our result with other recent studies that have slightly different assumptions (and apparently contradictory conclusions).

Bhuvnesh Jain; Pengjie Zhang

2007-09-17T23:59:59.000Z

447

Measuring students' information skills through concept mapping  

Science Conference Proceedings (OSTI)

This paper seeks to develop a methodology that will discover, specify and measure studentsâ?? abilities and skills in creating concept maps. Because competencies are the key factor in higher education, the paper analyzes the role of concept maps ... Keywords: competencies, concept maps, information literacy, information organization, skills

Maria Pinto; Anne-Vinciane Doucet; Andrés Fernández-Ramos

2010-08-01T23:59:59.000Z

448

Identifying important concepts from medical documents  

Science Conference Proceedings (OSTI)

Automated medical concept recognition is important for medical informatics such as medical document retrieval and text mining research. In this paper, we present a software tool called keyphrase identification program (KIP) for identifying topical concepts ... Keywords: Document keyphrase, Keyphrase extraction, Medical concepts, Medical documents, Noun phrase extraction, Text mining

Quanzhi Li; Yi-Fang Brook Wu

2006-12-01T23:59:59.000Z

449

Publications  

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

J. Yinger, and Joseph H. Eto. Integration of Distributed Energy Resources: The CERTS MicroGrid Concept., 2002. 2001 Yinger, Robert J.. Behavior of Capstone and Honeywell...

450

ESS 2012 Peer Review - Experimental Investigation of Silicon...  

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

Energy Storage and Grid Applications," presented at the Army Research Lab Advanced Microgrid Concepts and Technologies Workshop, Beltsville, MD (June 2012). 5 W.-C. Kao, S....

451

Modified biogeography-based optimisation (MBBO)  

Science Conference Proceedings (OSTI)

Modified biogeography-based optimisation (MBBO) technique is modified version of BBO which is a bio-inspired and population-based optimisation technique. Biogeography is the study of distribution of species in nature. In this paper, ...

M. R. Lohokare; S. Devi; S. S. Pattnaik; B. K. Panigrahi; J. G. Joshi

2011-07-01T23:59:59.000Z

452

A design concept for Caltech  

SciTech Connect

This article describes cogeneration at the California Institute of Technology (Caltech). 800 KW of electricity is generated by a back-pressured steam turbine using high pressure steam from existing boilers. The exhaust steam is sent to the campus' 345 KPa (50PSIG) steam system. There are ongoing plans to generate the high pressure steam using the hot exhaust gases from a 4 MW gas turbine. Caltech has found the first phase (the back-pressured steam turbine) of their cogeneration project cost effective. This article discusses the economic concept and performance of this first phase and also discusses the anticipated economic performance of the second phase (the gas turbine). Caltech's cost effective cogeneration facility was designed to interface with a plant that has existed for thirteen years.

Hife, R.R.; Fielding, G.M.

1985-07-01T23:59:59.000Z

453

Post-piledriver concept letter  

SciTech Connect

This is the concept for a series of post-shot investigations at the Piledriver site, Area 15, Nevada Test Site (NTS), to gain information on: Chimney geometry and associated wall rock conditions resulting from a deeply buried (1500-ft) nuclear explosion in granite; The characteristics and distribution of rubble and radioactivity in the chimney; and Data pertinent to in-situ leaching. These categories define the three phases of this proposal in chronological order. The technical programs under Phases II and III will depend on the results of Phase 1. Presently, it is not known whether or not there has been a collapse of the Piledriver cavity. If collapse occurred, the predicted dimensions of the chimney, based on Hardhat experience, are expected to be 250 ft in diameter and 560 ft high. For the purpose of this discussion, it is assumed this condition exists.

Werth, G. C.

1967-07-01T23:59:59.000Z

454

HEPA filter leaching concept validation trials at the Idaho Chemical Processing Plant  

SciTech Connect

The enclosed report documents six New Waste Calcining Facility (NWCF) HEPA filter leaching trials conducted at the Idaho Chemical Processing Plant using a filter leaching system to validate the filter leaching treatment concept. The test results show that a modified filter leaching system will be able to successfully remove both hazardous and radiological constituents to RCRA disposal levels. Based on the success of the filter leach trials, the existing leaching system will be modified to provide a safe, simple, effective, and operationally flexible filter leaching system.

Chakravartty, A.C.

1995-04-01T23:59:59.000Z

455

Image analysis by modified Legendre moments  

Science Conference Proceedings (OSTI)

In the paper, a new set of orthogonal moments based on the modified Legendre polynomials is introduced. Three properties of the modified Legendre polynomials, which are orthogonality, orthogonal invariance and the characteristic that an interval on the ... Keywords: Feature representation capability, Legendre moments, Modified Legendre moments, Translation invariance

Bo Fu; Jianzhong Zhou; Yuhong Li; Guojun Zhang; Cheng Wang

2007-02-01T23:59:59.000Z

456

Repository Reference Disposal Concepts and Thermal Load Management...  

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

Repository Reference Disposal Concepts and Thermal Load Management Analysis Repository Reference Disposal Concepts and Thermal Load Management Analysis A disposal concept consists...

457

Electrochemical Apparatus with Disposable and Modifiable Parts  

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

Electrochemical Apparatus with Disposable and Modifiable Parts Electrochemical Apparatus with Disposable and Modifiable Parts Electrochemical Apparatus with Disposable and Modifiable Parts The invention also includes electrochemical apparatus that can interface with optical instrumentation. If the working electrode is transparent, light from an optical fiber may be directed through the working electrode and into a cuvette. July 3, 2013 Electrochemical Apparatus with Disposable and Modifiable Parts Available for thumbnail of Feynman Center (505) 665-9090 Email Electrochemical Apparatus with Disposable and Modifiable Parts Applications: Electrochemical experiments in solution Electrochemical experiments on surfaces Bulk electrolysis experiments Fuel cells Corrosion studies Academic Labs Teaching and research Benefits: Incorporates disposable, commercially available cuvettes

458

Bangladesh-NAMA Concepts | Open Energy Information  

Open Energy Info (EERE)

Bangladesh-NAMA Concepts Bangladesh-NAMA Concepts (Redirected from NAMAs in Least Developed Countries) Jump to: navigation, search Name NAMA Concepts for Bangladesh Agency/Company /Organization International Institute for Sustainable Development (IISD) Sector Climate, Energy, Land Focus Area Non-renewable Energy, Agriculture, Buildings, Energy Efficiency, Forestry, Greenhouse Gas, Industry, Land Use, Transportation Topics Adaptation, Background analysis, Baseline projection, GHG inventory, Low emission development planning, Pathways analysis Program Start 2010 Program End 2013 Country Bangladesh Southern Asia References International Institute for Sustainable Development (IISD)[1] "This policy brief presents the results of a screening exercise to identify NAMA concepts for Bangladesh. Multiple government planning documents were

459

3.1.3. Terminology/Concepts  

Science Conference Proceedings (OSTI)

... are just a few fundamental concepts needed ... to other sections in the Handbook where they ... of observations required to answer specific questions. ...

2012-03-31T23:59:59.000Z

460

Renewable Energy Project Development: Advanced Concept Topics  

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

Concept Topics An Introduction to Risk, Tribal Roles, and Support Policies in the Renewable Energy Project Development Process Course Outline What we will cover... About the...

Note: This page contains sample records for the topic "modified microgrid concept" 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

Thermodynamics in Modified Gravity Theories  

E-Print Network (OSTI)

We demonstrate that there does exist an equilibrium description of thermodynamics on the apparent horizon in the expanding cosmological background for a wide class of modified gravity theories with the Lagrangian density $f(R, \\phi, X)$, where $R$ is the Ricci scalar and $X$ is the kinetic energy of a scalar field $\\phi$. This comes from a suitable definition of an energy momentum tensor of the "dark" component obeying the local energy conservation law in the Jordan frame. It is shown that the equilibrium description in terms of the horizon entropy $S$ is convenient because it takes into account the contribution of the horizon entropy $\\hat{S}$ in non-equilibrium thermodynamics as well as an entropy production term.

Kazuharu Bamba; Chao-Qiang Geng; Shinji Tsujikawa

2011-01-19T23:59:59.000Z

462

SUMMARY OF 2009 RHEOLOGY MODIFIER PROGRAM  

SciTech Connect

The overall objective of the EM-31 Rheological Modifiers and Wetting Agents program is to utilize commercially available rheology modifiers to increase the solids fraction of radioactive sludge based waste streams, resulting in an increase in throughput and decreasing the overall processing time. The program first investigates the impact of rheology modifiers on slurry simulants and then utilizes the most effective rheology modifiers on radioactive slurries. The work presented in this document covers the initial investigation of rheology modifier testing with simulants. This task is supported by both the Savannah River National Laboratory (SRNL) and Pacific Northwest National Laboratory (PNNL). The SRNL EM-31 task, for this year, was to investigate the use of rheology modifiers on simulant Defense Waste Processing Facility (DWPF) melter feeds. The task is to determine, based on the impact of the rheology modifier, if there are rheology modifiers that could reduce the water content of the slurry going to the DWPF melter, hence increasing the melt rate by decreasing the water loading. The rheology modifier in essence would allow a higher solids content slurry to have the same type of rheology or pumpability of a lower solids slurry. The modifiers selected in this report were determined based on previous modifiers used in high level waste melter feed simulants, on-going testing performed by counterparts at PNNL, and experiences gain through use of modifiers in other Department of Energy (DOE) processes such as grout processing. There were 12 rheology modifiers selected for testing, covering both organic and inorganic types and they were tested at four different concentrations for a given melter feed. Five different DWPF melter feeds were available and there was adequate material in one of the melter feeds to increase the solids concentration, resulting in a total of six simulants for testing. The mass of melter feed available in each simulant was not adequate for testing each rheology modifier, hence based on the changes in rheology for a given rheology modifier, rheology modifiers were either dropped or added between simulants. Three rheology modifiers were used on all simulants. The results from this testing indicate that citric acid or polycarboxylate based rheology modifiers are the most effective in reducing the yield stress, by as much as 70% at the higher rheology modifier additions and were effective on most of the tested simulants. These rheology modifiers are organic, hence the can also be used as reductants in melter operations. The most effective non-organic rheology modifiers, sodium metasilicate reduced the yield stress by 10%. It is recommended that both citric acid and commercially available polycarboxylate rheology modifiers be further investigated. Different molecular weight polycarboxylates and different types of polycarboxylates used in other industries must be considered. These polycarboxylates are extensively utilized in the cement, ceramic, and water treatment processes, hence readily available. Future work on DWPF melter feeds involving rheology modifiers should include, assuming the present method of processing sludge through DPWF does not change, is: (1) Investigate the use of polycarboxylate in various processes and procure polycarboxylates for testing. Limit rheology modifier selection and future testing between four and eight different types. (2) Test rheology modifiers on at least two different chemical types or bounding DWPF SME product simulants. Test to include the impact of boiling and the effectiveness in reducing water content via rheology versus weight percent curves. (3) Based on selected modifiers, perform testing on actual radioactive melter feed based on results from simulant testing.

Hansen, E.

2009-12-08T23:59:59.000Z

463

Learning conjunctive concepts in structural domains  

Science Conference Proceedings (OSTI)

We study the problem of learning conjunctive concepts from examples on structural domains like the blocks world. nus class of concepts is formally defined and it is shown that even for samples in which each example (positive or negative) is a two-object ...

David Haussler

1987-07-01T23:59:59.000Z

464

Concept formation using incremental Gaussian mixture models  

Science Conference Proceedings (OSTI)

This paper presents a new algorithm for incremental concept formation based on a Bayesian framework. The algorithm, called IGMM (for Incremental Gaussian Mixture Model), uses a probabilistic approach for modeling the environment, and so, it can rely ... Keywords: Bayesian methods, EM algorithm, clustering, concept formation, finite mixtures, incremental learning, unsupervised learning

Paulo Martins Engel; Milton Roberto Heinen

2010-11-01T23:59:59.000Z

465

Calcine Conversion Facility alternative concepts engineering studies  

SciTech Connect

The purpose of the engineering study reported is to develop conceptual designs for two alternative facilities for the conversion of high level waste calcine to high level glass. The objectives and design bases of the two concepts (CCF/RSSF and CCF/FRP) are described. No recommendation of one concept in preference to the other is given. (LK)

1975-02-01T23:59:59.000Z

466

Hydrogen-via-Electricity concept. Critique report  

SciTech Connect

The Hydrogen-via-Electricity (HvE) concept is the prospective use of hydrogen fuel, produced electrolytically from the electric utility grid, as a means of responding to conventional fuels shortages. This report makes available the two sets of comments and critiques of this concept solicited from the Government/Government contractor group and from the electric utility companies.

Escher, W.J.D.; Ecklund, E.E.

1981-01-01T23:59:59.000Z

467

Novel Nitride-Modified Multielectron Conversion Electrode ...  

Novel Nitride-Modified Multielectron Conversion Electrode Materials for Lithium Ion Batteries Note: The technology described above is an early stage opportunity.

468

Enzymatic treatment of wool with modified proteases.  

E-Print Network (OSTI)

??The tendency of wool to felt and shrink is mainly due to its scaly structure. The chlorine-Hercosett is the most widespread process used to modify… (more)

Silva, Carla J. S. M.

2005-01-01T23:59:59.000Z

469

Screening analysis of solar thermochemical hydrogen concepts.  

DOE Green Energy (OSTI)

A screening analysis was performed to identify concentrating solar power (CSP) concepts that produce hydrogen with the highest efficiency. Several CSP concepts were identified that have the potential to be much more efficient than today's low-temperature electrolysis technology. They combine a central receiver or dish with either a thermochemical cycle or high-temperature electrolyzer that operate at temperatures >600 C. The solar-to-hydrogen efficiencies of the best central receiver concepts exceed 20%, significantly better than the 14% value predicted for low-temperature electrolysis.

Diver, Richard B., Jr.; Kolb, Gregory J.

2008-03-01T23:59:59.000Z

470

Meteorological Network Expansion Using Information Decay Concept  

Science Conference Proceedings (OSTI)

A generalized network design methodology was developed by using the basic entropy concept introduced by Shannon in communication engineering. In order to select potential sites for meteorological network expansion purposes, the meteorological ...

Tahir Husain; Mustafa A. Ukayli; Hasin U. Khan

1986-03-01T23:59:59.000Z

471

DNV Global Energy Concepts | Open Energy Information  

Open Energy Info (EERE)

DNV Global Energy Concepts DNV Global Energy Concepts Jump to: navigation, search Name DNV Global Energy Concepts Place Seattle, Washington Zip 98101 Sector Services Product Global Energy Concepts LLC (GEC) is a multi-discipline engineering and technology consulting firm providing services to clients involved in the energy industry. Coordinates 47.60356°, -122.329439° 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":47.60356,"lon":-122.329439,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

472

Zero Emission Coal Power, a New Concept  

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

Emission Coal Power, a New Concept H.-J. Ziock, (ziock@lanl.gov; 505-667-7265), K. S. Lackner Los Alamos National Laboratory Mail stop D462 Los Alamos, NM 87545 D. P. Harrison,...

473

The Passive House: A Sustainable Building Concept  

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

Passive House: A Sustainable Building Concept Speaker(s): Benjamin Krick Date: November 13, 2012 - 11:00am Location: 90-1099 Seminar HostPoint of Contact: Christian Kohler This...

474

An Advanced Measurement Concept: The Integrated Sensor  

Science Conference Proceedings (OSTI)

An integrated sensor is a complete measurement system that communicates its signals to a data collection and archival facility. The paper describes the concept, and how it developed from and relates to the more traditional systems. It includes a ...

Julian M. Pike

1986-03-01T23:59:59.000Z

475

REVIEW OF RHEOLOGY MODIFIERS FOR HANFORD WASTE  

Science Conference Proceedings (OSTI)

As part of Savannah River National Laboratory (SRNL)?s strategic development scope for the Department of Energy ? Office of River Protection (DOE-ORP) Hanford Tank Waste Treatment and Immobilization Plant (WTP) waste feed acceptance and product qualification scope, the SRNL has been requested to recommend candidate rheology modifiers to be evaluated to adjust slurry properties in the Hanford Tank Farm. SRNL has performed extensive testing of rheology modifiers for use with Defense Waste Processing Facility (DWPF) simulated melter feed ? a high undissolved solids (UDS) mixture of simulated Savannah River Site (SRS) Tank Farm sludge, nitric and formic acids, and glass frit. A much smaller set of evaluations with Hanford simulated waste have also been completed. This report summarizes past work and recommends modifiers for further evaluation with Hanford simulated wastes followed by verification with actual waste samples. Based on the review of available data, a few compounds/systems appear to hold the most promise. For all types of evaluated simulated wastes (caustic Handford tank waste and DWPF processing samples with pH ranging from slightly acidic to slightly caustic), polyacrylic acid had positive impacts on rheology. Citric acid also showed improvement in yield stress on a wide variety of samples. It is recommended that both polyacrylic acid and citric acid be further evaluated as rheology modifiers for Hanford waste. These materials are weak organic acids with the following potential issues: ? The acidic nature of the modifiers may impact waste pH, if added in very large doses. If pH is significantly reduced by the modifier addition, dissolution of UDS and increased corrosion of tanks, piping, pumps, and other process equipment could occur. Smaller shifts in pH could reduce aluminum solubility, which would be expected to increase the yield stress of the sludge. Therefore, it is expected that use of an acidic modifier would be limited to concentrations that do not appreciably change the pH of the waste. ? Organics are typically reductants and could impact glass REDOX if not accounted for in the reductant addition calculations. ? Stability of the modifiers in a caustic, radioactive environment is not known, but some of the modifiers tested were specifically designed to withstand caustic conditions. ? These acids will add to the total organic carbon content of the wastes. Radiolytic decomposition of the acids could result in organic and hydrogen gas generation. These potential impacts must be addressed in future studies with simulants representative of real waste and finally with tests using actual waste based on the rheology differences seen between SRS simulants and actual waste. The only non-organic modifier evaluated was sodium metasilicate. Further evaluation of this modifier is recommended if a reducing modifier is a concern.

Pareizs, J.

2013-09-30T23:59:59.000Z

476

SLUDGE TREATMENT PROJECT COST COMPARISON BETWEEN HYDRAULIC LOADING AND SMALL CANISTER LOADING CONCEPTS  

SciTech Connect

The Sludge Treatment Project (STP) is considering two different concepts for the retrieval, loading, transport and interim storage of the K Basin sludge. The two design concepts under consideration are: (1) Hydraulic Loading Concept - In the hydraulic loading concept, the sludge is retrieved from the Engineered Containers directly into the Sludge Transport and Storage Container (STSC) while located in the STS cask in the modified KW Basin Annex. The sludge is loaded via a series of transfer, settle, decant, and filtration return steps until the STSC sludge transportation limits are met. The STSC is then transported to T Plant and placed in storage arrays in the T Plant canyon cells for interim storage. (2) Small Canister Concept - In the small canister concept, the sludge is transferred from the Engineered Containers (ECs) into a settling vessel. After settling and decanting, the sludge is loaded underwater into small canisters. The small canisters are then transferred to the existing Fuel Transport System (FTS) where they are loaded underwater into the FTS Shielded Transfer Cask (STC). The STC is raised from the basin and placed into the Cask Transfer Overpack (CTO), loaded onto the trailer in the KW Basin Annex for transport to T Plant. At T Plant, the CTO is removed from the transport trailer and placed on the canyon deck. The CTO and STC are opened and the small canisters are removed using the canyon crane and placed into an STSC. The STSC is closed, and placed in storage arrays in the T Plant canyon cells for interim storage. The purpose of the cost estimate is to provide a comparison of the two concepts described.

GEUTHER J; CONRAD EA; RHOADARMER D

2009-08-24T23:59:59.000Z

477

Sustainable Energy Concepts: A Sustainable energy concept for Safari Resort Beekse Bergen.  

E-Print Network (OSTI)

??Research to sustainable energy concepts with a holiday resort as case study. Near the safaripark a new holiday resort will be built. The missing natrual… (more)

Vons, G.J.

2011-01-01T23:59:59.000Z

478

Concept:U.S. National Lab Programs | Open Energy Information  

Open Energy Info (EERE)

Login | Sign Up Search Concept Edit History Facebook icon Twitter icon Concept:U.S. National Lab Programs Jump to: navigation, search Description of concept "U.S. National...

479

Routing Protocols and Concepts, CCNA Exploration Companion Guide  

Science Conference Proceedings (OSTI)

Routing Protocols and Concepts CCNA Exploration Companion Guide Routing Protocols and Concepts, CCNA Exploration Companion Guide is the official supplemental textbook for the Routing Protocols and Concepts course in the Cisco Networking Academy CCNA ...

Rick Graziani; Allan Johnson

2007-12-01T23:59:59.000Z

480

Observationally Verifiable Predictions of Modified Gravity  

Science Conference Proceedings (OSTI)

MOG is a fully relativistic modified theory of gravity based on an action principle. The MOG field equations are exactly solvable numerically in two important cases. In the spherically symmetric

J. W. Moffat; V. T. Toth

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Theory of Deliquescence and Modified Köhler Curves  

Science Conference Proceedings (OSTI)

The conventional Köhler theory, which describes the equilibrium sizes of hygroscopic aerosol particles in humid air, is modified by considering the solubility limitation so that the deliquescence and hysteresis processes can also be explained. A ...

Jen-Ping Chen

1994-12-01T23:59:59.000Z

482

Program on Technology Innovation: Crystal Habit Modifiers  

Science Conference Proceedings (OSTI)

This report presents the results of a review of the scientific and technical literature pertaining to the potential use of crystal habit modifiers to control the formation or consequent effects of deposits in nuclear plant systems. Crystal habit modifiers (CHMs) could potentially be added to the primary or secondary circuits of a pressurized water reactor (PWR) or to boiling water reactor (BWR) coolant as a means of controlling the crystal habit (shape) of the crystals that comprise primary and secondary...

2007-12-17T23:59:59.000Z

483

Innovative Confinement Concepts Workshop 2000 (Book of Abstracts)  

E-Print Network (OSTI)

Nuclear Fusion Reactor Space Propulsion Vehicle Concept forNuclear Fusion Reactor Space Propulsion Vehicle Concept forfusion reactor-based space propulsion system is proposed as

Celata, Christine; Accelerator and Fusion Research Staff

2000-01-01T23:59:59.000Z

484

Concept for Management of the Future Electricity System (Smart...  

Open Energy Info (EERE)

Concept for Management of the Future Electricity System (Smart Grid Project) Jump to: navigation, search Project Name Concept for Management of the Future Electricity System...

485

Tribal Renewable Energy Advanced Course: Project Financing Concepts...  

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

Financing Concepts Tribal Renewable Energy Advanced Course: Project Financing Concepts Watch the DOE Office of Indian Energy's advanced renewable energy course entitled "Tribal...

486

Viridian Concepts Ltd | Open Energy Information  

Open Energy Info (EERE)

Viridian Concepts Ltd Viridian Concepts Ltd Jump to: navigation, search Name Viridian Concepts Ltd Place Cambridge, United Kingdom Zip SG8 5NT Sector Solar Product Developing a low-cost solar thermal panel for household use. Coordinates 43.003745°, -89.017499° 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":43.003745,"lon":-89.017499,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

487

Concept:Utility Companies | Open Energy Information  

Open Energy Info (EERE)

Utility Companies Utility Companies Jump to: navigation, search Description of concept "Utility Companies"RDF feed [[Category:Utility Companies]] [[EiaUtilityId::+]] Contents: Top - 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Pages of concept "Utility Companies" Showing 200 pages belonging to that concept. (previous 200) (next 200) 4 4-County Electric Power Assn A A & N Electric Coop A & N Electric Coop (Virginia) AEP Generating Company AEP Texas Central Company AEP Texas North Company AES Eastern Energy LP AGC Division of APG Inc AP Holdings LLC AP Holdings LLC (New York) APN Starfirst, L.P. APN Starfirst, L.P. (Illinois) APN Starfirst, L.P. (Ohio) APN Starfirst, L.P. (Texas) APNA Energy ARCO Products Co-Watson Accent Energy Holdings, LLC Accent Energy Holdings, LLC (New York)

488

Renewable Energy Project Development: Advanced Concept Topics  

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

Concept Topics Concept Topics An Introduction to Risk, Tribal Roles, and Support Policies in the Renewable Energy Project Development Process Course Outline What we will cover...  About the DOE Office of Indian Energy Education Initiative  Concepts and Policies for Understanding Renewable Energy Projects on Tribal Lands - Risk and Uncertainty - Tribal Project Roles - Policies and Incentives  Additional Information and Resources 2 Introduction The U.S. Department of Energy (DOE) Office of Indian Energy Policy and Programs is responsible for assisting Tribes with energy planning and development, infrastructure, energy costs, and electrification of Indian lands and homes. As part of this commitment and on behalf of DOE, the Office of Indian Energy is leading education

489

Update; Sodium advanced fast reactor (SAFR) concept  

SciTech Connect

This paper reports on the sodium advanced fast reactor (SAFR) concept developed by the team of Rockwell International, Combustion Engineering, and Bechtel during the 3-year period extending from January 1985 to December 1987 as one element in the U.S. Department of Energy's Advanced Liquid Metal Reactor Program. In January 1988, the team was expanded to include Duke Engineering and Services, Inc., and the concept development was extended under DOE's Program for Improvement in Advanced Modular LMR Design. The SAFR plant concept employs a 450-MWe pool-type liquid metal cooled reactor as its basic module. The reactor assembly module is a standardized shop-fabricated unit that can be shipped to the plant site by barge for installation. Shop fabrication minimizes nuclear-grade field fabrication and reduces the plant construction schedule. Reactor modules can be used individually or in multiples at a given site to supply the needed generating capacity.

Oldenkamp, R.D.; Brunings, J.E. (Rockwell International Corp., Canoga Park, CA (USA)); Guenther, E. (Combustion Engineering, Windsor, CT (US)); Hren, R. (Bechtel National Inc., San Francisco, CA (US))

1988-01-01T23:59:59.000Z

490

Genetically Modified Organism (GMO) Laboratory Proficiency Testing Program  

Science Conference Proceedings (OSTI)

Lab Proficiency Testing service for Genetically Modified Organism(GMO) in Roundup Ready, Soy Flour, Non-Modified Soy Flour samples. Genetically Modified Organism (GMO) Laboratory Proficiency Testing Program Laboratory Proficiency Program (LPP) aocs appli

491

DNA polymerase having modified nucleotide binding site for DNA sequencing  

DOE Patents (OSTI)

A modified gene encoding a modified DNA polymerase is disclosed. The modified polymerase incorporates dideoxynucleotides at least 20-fold better compared to the corresponding deoxynucleotides as compared with the corresponding naturally-occurring DNA polymerase. 6 figs.

Tabor, S.; Richardson, C.

1997-03-25T23:59:59.000Z

492

74 Scientific AmericAn January 2010 Key conceptS  

E-Print Network (OSTI)

74 Scientific AmericAn January 2010 Key conceptS Nuclear bombs dropped on cities and industrial Worry has focused on the U.S. versus Russia, but a regional nuclear war between India and Pakistan could ago international teams of scientists showed that a nuclear war between the U.S. and the Soviet Union

Robock, Alan

493

Bangladesh-NAMA Concepts | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Bangladesh-NAMA Concepts Jump to: navigation, search Name NAMA Concepts for Bangladesh Agency/Company /Organization International Institute for Sustainable Development (IISD) Sector Climate, Energy, Land Focus Area Non-renewable Energy, Agriculture, Buildings, Energy Efficiency, Forestry, Greenhouse Gas, Industry, Land Use, Transportation Topics Adaptation, Background analysis, Baseline projection, GHG inventory, Low emission development planning, Pathways analysis Program Start 2010 Program End 2013 Country Bangladesh Southern Asia References International Institute for Sustainable Development (IISD)[1]

494

Building performance analysis using interactive multimedia concepts  

Science Conference Proceedings (OSTI)

We describe LBL's involvement with multimedia concepts by discussing several modules of an advanced computer-based building envelope design tool. The qualitative and quantitative aspects of the building design process are accommodated within the same design tool which uses object-oriented programming procedures. This computer-based concept utilizes images (buildings, landscapes, models, documents, etc.), expert systems (knowledge bases, i.e., lighting design, site planning, HVAC design, etc.), and data bases (design criteria, utility rates, climatic data, etc.) in addition to more traditional simulation models to evaluate building design alternatives.

Selkowitz, S.; Beltran, L.; Osterhaus, W.; Papamichael, K.; Schuman, J.; Sullivan, R.; Wilde, M.

1992-04-01T23:59:59.000Z

495

Building performance analysis using interactive multimedia concepts  

Science Conference Proceedings (OSTI)

We describe LBL`s involvement with multimedia concepts by discussing several modules of an advanced computer-based building envelope design tool. The qualitative and quantitative aspects of the building design process are accommodated within the same design tool which uses object-oriented programming procedures. This computer-based concept utilizes images (buildings, landscapes, models, documents, etc.), expert systems (knowledge bases, i.e., lighting design, site planning, HVAC design, etc.), and data bases (design criteria, utility rates, climatic data, etc.) in addition to more traditional simulation models to evaluate building design alternatives.

Selkowitz, S.; Beltran, L.; Osterhaus, W.; Papamichael, K.; Schuman, J.; Sullivan, R.; Wilde, M.

1992-04-01T23:59:59.000Z

496

HYDRAULIC CALCULATIONS FOR A MODIFIED IN-SITU RETORT  

E-Print Network (OSTI)

LBL-1 0431 UC-91 HYDRAULIC CALCULATIONS FOR A MODIFIED IN-REFERENCES • . • • • • . , . HYDRAULIC CALCULATIONS FOR ACalifomia. LBL-10431 HYDRAULIC CALCULATIONS FOR A MODIFIED

Hall, W.G.

2012-01-01T23:59:59.000Z

497

Cell properties for modified PTMA cathodes of organic radical...  

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

Cell properties for modified PTMA cathodes of organic radical batteries Title Cell properties for modified PTMA cathodes of organic radical batteries Publication Type Journal...

498

Hydrogen Storage Workshop Advanced Concepts Working Group  

E-Print Network (OSTI)

/ Current Status · Aerogels are the scaffold; template with organic functional groups; physisorption, acid benign ­ Inexpensive #12;Self-Assembled Nanocomposites ­ R&D Needs 1. Studying silica aerogels 2. Modifying aerogels 3. Theoretical Modeling - various chemical structures / materials 4. Functionalization

499

Enhancing clinical concept extraction with distributional semantics  

Science Conference Proceedings (OSTI)

Extracting concepts (such as drugs, symptoms, and diagnoses) from clinical narratives constitutes a basic enabling technology to unlock the knowledge within and support more advanced reasoning applications such as diagnosis explanation, disease progression ... Keywords: Clinical informatics, Distributional semantics, Information extraction, NER, NLP

Siddhartha Jonnalagadda; Trevor Cohen; Stephen Wu; Graciela Gonzalez

2012-02-01T23:59:59.000Z

500

Conception Wind Project | Open Energy Information  

Open Energy Info (EERE)

Conception Wind Project Conception Wind Project Jump to: navigation, search Name Conception Wind Project Facility Conception Wind Project Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Wind Capital Group/John Deere Capital Developer Wind Capital Group/John Deere Capital Energy Purchaser Associated Electric Cooperative Location Nodaway County MO Coordinates 40.246984°, -94.675376° 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":40.246984,"lon":-94.675376,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}