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    EPRI MicroGrid

    Uploaded by

    Andrei Horhoianu
    This document summarizes the development of a testbed for microgrid testing by the Consortium for Electric Reliability Technology Solutions (CERTS). It describes the microgrid concept of integrating distributed energy sources for improved reliability and efficiency. It then provides examples of campus microgrid systems with multiple distributed generators, energy storage, and control systems. Finally, it outlines the CERTS microgrid testbed, which will be located at a utility site to test microgrid control strategies for easy interconnection of distributed generators.

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    EPRI MicroGrid

    Uploaded by

    Andrei Horhoianu
    217 views9 pages
    This document summarizes the development of a testbed for microgrid testing by the Consortium for Electric Reliability Technology Solutions (CERTS). It describes the microgrid concept of integrating distributed energy sources for improved reliability and efficiency. It then provides examples of campus microgrid systems with multiple distributed generators, energy storage, and control systems. Finally, it outlines the CERTS microgrid testbed, which will be located at a utility site to test microgrid control strategies for easy interconnection of distributed generators.

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    Microgrid

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    This document summarizes the development of a testbed for microgrid testing by the Consortium for Electric Reliability Technology Solutions (CERTS). It describes the microgrid concept of integrating distributed energy sources for improved reliability and efficiency. It then provides examples of campus microgrid systems with multiple distributed generators, energy storage, and control systems. Finally, it outlines the CERTS microgrid testbed, which will be located at a utility site to test microgrid control strategies for easy interconnection of distributed generators.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    217 views9 pages

    EPRI MicroGrid

    Uploaded by

    Andrei Horhoianu
    This document summarizes the development of a testbed for microgrid testing by the Consortium for Electric Reliability Technology Solutions (CERTS). It describes the microgrid concept of integrating distributed energy sources for improved reliability and efficiency. It then provides examples of campus microgrid systems with multiple distributed generators, energy storage, and control systems. Finally, it outlines the CERTS microgrid testbed, which will be located at a utility site to test microgrid control strategies for easy interconnection of distributed generators.

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    Development of Sources and a

    Testbed for
    CERTS Microgrid Testing
    IEEE PES General Meeting
    June 8, 2004
    John Stevens
    Sandia National Laboratories
    Albuquerque, NM

    What is CERTS?
    NO ITS NOT A BREATH MINT!
    Consortium for Electric Reliability
    Technology Solutions
    Organization of Private industry, universities
    and national laboratories to conduct public
    interest research on electric reliability
    technologies
    Lots of projects ongoing http://certs.lbl.gov
    Microgrid project supported by California
    Energy Commission and US DOE

    Microgrid Concept
    The concepts that drive the design
    Improved energy efficiency (CHP)
    Improved power quality and reliability

    An integrated system that contains:

    Sources
    Loads
    Protection
    Controls
    A means to rapidly separate from the main
    utility system

    Many Options for Building a


    Microgrid
    Rotating-machine interface vs electronic
    interface
    For example, diesel engine/generator vs fuel
    cell

    Geographically dispersed sources vs colocated (electrically) sources


    Huge difference in complexity of microgrid
    control and protection

    A Campus Microgrid System


    Dormitory A

    Isolating Device (opens


    during micro-grid mode)

    500 kVA

    Dormitory B

    Administrative
    Building
    300 kVA

    500 kVA

    Campus Owned
    Distribution (13.2 kV)

    Utility System
    Primary Connection
    (13.2 kV)

    Utility System
    Interface Control

    Generator
    Step Up
    Transformer

    (Synchronization, fault
    protection, islanding detection,
    etc.)

    To Other
    Campus
    Loads

    Heat Distribution

    75 kVA

    Student
    Union

    Voltage
    Regulator

    Academic
    Building B

    Paralleling Bus (4.8 kV)

    Communication & Control Signal Path

    Generator
    Protection
    and Control

    1.75
    MVA
    Gen

    1.75
    MVA

    1.75
    MVA
    Gen

    Gen

    Academic Building A
    800 kVA

    300
    kVA

    Load
    control

    Heat Recovered
    from ICE Units

    Heat Distribution

    Courtesy EPRI

    A More Sophisticated Campus-Based Microgrid with


    Multiple Dispersed Sources, Master Controller and
    Dynamic Stabilizer
    Local Generator
    Protection and
    Control

    Isolating Device (opens


    during micro-grid mode)

    Sectionalizing switch
    with synchronization

    1000 kW ICE
    Generator Dormitory A
    (500 kVA)

    Dormitory B
    (500 kVA)

    Administrative Building
    (300 kVA)
    75 kW PV
    System

    Gen

    Heat
    Heat

    Campus Owned
    Distribution (13.2 kV)

    Utility System Primary


    Connection (13.2 kV)

    Utility System
    Interface Controller
    (Synchronization, fault protection,
    islanding detection, etc.)

    Dynamic
    Stabilization
    Device

    To Other
    Campus Loads
    (500 kVA)

    Student Union
    75 kVA

    Energy
    Storage

    Communication &
    Control Signal Path

    Academic Building B
    (300 kVA)

    Heat Academic Building A


    (800 kVA)

    Master Controller
    (coordinates system operating
    mode, frequency, voltage and
    generation dispatch)

    Heat

    Gen

    Local Generator
    Protection and
    Control
    2000 kW ICE
    Generator

    75 kW Wind System

    Courtesy EPRI

    CERTS Microgrid Testbed


    4-Wire 480 V

    Energy Manager
    Zone-3

    P-1

    P-2

    Zone-4

    Feeder A

    B-4

    B-3
    Zone-2
    4-Wire 480 V
    Zone-1
    PCC

    Sensitive Loads

    Static
    Switch

    3-Wire 480 V
    P-3

    Zone-5

    Feeder B

    B-5
    13.8 kV

    4-Wire 480 V
    Feeder C

    Zone-6

    Traditional Loads

    Microsource

    Power Flow
    Controller

    Point of
    Common
    Coupling

    Breaker

    The CERTS Microgrid Project


    Develop a control strategy to ease electrical
    interconnection of DG in a microgrid
    Incorporate that strategy into a DG source
    Design and build a testbed
    To be at a utility-operated site

    Run a specified set of tests


    Respond to issues uncovered
    Rerun tests
    Invite review and custom testing from utility and
    DG communities

    Status
    Control algorithms developed and extensively tested
    through simulations and lab-scale hardware testing
    (University of Wisconsin)
    Testbed design nearing completion (Northern Power
    Systems)
    Test inverters being developed for proof of
    concept testing (Northern Power Systems)
    Finalizing agreement with Capstone Turbines to
    incorporate CERTS controls into 60kW turbines
    Discussions ongoing with interested utilities to select
    testbed site

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