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    BRIEFING ON ENERGY IMPROVEMENT DISTRICT MICROGRIDS

    Presentation to:US Congressional Staff

    May 10, 2010

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    Pareto Energys Definition of Microgrid

    () (

    )

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    UNDERSTANDINGOFSTAMFORDENERG

    The UBS 103,000 Sq. Ft. Trading Floor Largest in the World

    USERS

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    Connecticut Generators Use Indonesian Coal

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    Coal is Shipped 12,000 Nautical Miles to Bridgeport

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    HOW

    TH

    ECURRENTGRID

    DELIVERSENER

    30-40% of Coal Use Results in Power60-70% of Coal Use Results in Green House Gas Emissions

    Y

    TOSTAMFORD

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    HOW

    TH

    ECURRENTGRID

    DELIVERSENER

    Power to Norwalk Via 345 KV Overhead (5-7% line loss)

    Y

    TOSTAMFORD

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    HOW

    TH

    ECURRENTGRID

    DELIVERSENER

    New England T&D System Exposed to Winter Storms

    Y

    TOSTAMFORD

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    HOW

    TH

    ECURRENTGRID

    DELIVERSENER

    New England T&D System Exposed to Summer Storms

    Y

    TOSTAMFORD

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    HOW

    TH

    ECURRENTGRID

    DELIVERSENER

    Power To Customer Via 13 KV Lines

    Y

    TOSTAMFORD

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    HOW

    TH

    ECURRENTGRID

    DELIVERSENER

    Distribution Also Exposed to Weather Outages

    Y

    TOSTAMFORD

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    HOW

    TH

    ECURRENTGRID

    DELIVERSENER

    Distribution Failures Due to Short Circuits Have Occurred

    Y

    TOSTAMFORD

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    HOW

    TH

    ECURRENTGRID

    DELIVERSENER

    The Grid Serves Critical Infrastructure

    Y

    TOSTAMFORD

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    THEMIC

    ROGRIDSOLUTION

    STEPBYSTEP

    Microgrid Step 1: Locate Power at or Near Its Point of Use

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    THEMIC

    ROGRIDSOLUTION

    STEPBYSTEP

    Microgrid Step 2: Combined Heat and Power

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    THEMIC

    ROGRIDSOLUTION

    STEPBYSTEP

    Microgrid Step 5: Develop Architecture and Governance

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    THEMICROGRIDSOLUTIONSTEPBYST

    Microgrid Step 3: Overcome the Grid Interconnection ProblemThe Post-Microgrid Distribution System

    P

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    MICROGRID

    COST-BENEFIT

    Comparative Cost of Power in StamfordFor a Customer with Diesel Backup Versus a CHP Microgrid

    Costs Grid Only EID

    Grid Power + DieselBackup $0.21 $0.23

    - vo e eseback-ups $0.21 $0.21

    - Trigeneration $0.21 $0.16

    - State and FederalIncentives $0.21 $0.13

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    MICROGRIDENVIRONME

    NTALIMPACT

    Comparative Emissions in StamfordFor a Customer with Diesel Backup Versus a CHP Microgrid

    NOx

    EID Emissions Reduction

    CO2

    SO2

    0 500,000 1,000,000 1,500,000 2,000,000

    t

    Without EID

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    CONSID

    ERINGMICROGRID

    SINTHENATION

    S

    CAPITAL

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    CONSIDERINGMICROGRIDSINTHENATIONSCAPIT

    L

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