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Interactive Distributed Generation for Demand Response

Interactive Distributed Generation for Demand Response. Town Meeting: July 13-14, 2009 Washington DC. Wayne Hartmann; VP, Marketing whartmann@powersecure.com www.powersecure.com 919-556-3056. Discussion Topics. What is “Interactive Distributed Generation?”

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Interactive Distributed Generation for Demand Response

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  1. Interactive Distributed Generation for Demand Response Town Meeting: July 13-14, 2009 Washington DC Wayne Hartmann; VP, Marketing whartmann@powersecure.com www.powersecure.com 919-556-3056

  2. Discussion Topics • What is “Interactive Distributed Generation?” • How can IDG be used as a DR Tool? • Why Employ IDG in the DR Tool Set? • Making IDG Happen

  3. What is IDG? • Use of a Customer’s on-site distributed generation (DG) for DR purposes • DG size typically 250-5,000kW • Employ Reciprocating Engine Technology • Single or multiple engine generators • Connected to the distribution system • Interactive (the “I” in IDG) • DG is under Utility control for a DR call • DG is monitored for reliability

  4. IDG in DR Role Without IDG With IDG

  5. IDG: Typical Installation

  6. Dispatching & Monitoring Broadband typically used as communication medium No SCADA Additions/Modifications Needed !!!

  7. IDGTurnkeyApplication

  8. IDG Retrofit Applications Aka: “Harvesting”

  9. IDG: How Used for DR • Relieves Customer load by: • Load management (peak shaving) • Complete load curtailment • IDG provides seamless operation • IDG is paralleled with Utility • Soft Customer & Utility unloading/reloading • Does not disturb Customer’s process or business • IDG also provides Standby Power

  10. Load Management

  11. CompleteLoad Curtailment

  12. Why Employ IDG for DR? Dispatchable by the Utility “Harvesting” Lowest $/kW for Firm Capacity Future: Address Distribution Constraints Intelligent Grid/MicroGrid Capability • Peak Load Management • Defer T&D Build Out • Address Distribution “Hot Spots” • Address Transmission Constraints • Utility Does Not Own the Asset • Customer Owns the Asset • No Cap & Trade Issues

  13. Sustainability & Losses: Conventional Power Delivery • Losses typically 3-7% • 5% used in this example

  14. Sustainability & Losses: IDG for DR • Heat rates (efficiency) of modern engine/gensets applied in IDG systems are as good if not better than combustion turbines (CTs) [1,2]. • IDG capacity has a heat rate of 9,800 btu/kWh saving approximately 2,200 btu/kWh of fuel input compared to the overall peak power generation portfolio published by eGrid [3]. • [1] California Energy Commission; http://www.energy.ca.gov/distgen/equipment/reciprocating_engines/reciprocating_engines.html • [2] California Energy Commission; http://www.energy.ca.gov/distgen/equipment/combustion_turbines/combustion_turbines.html • [3] http://www.epa.gov/cleanenergy/energy-resources/egrid/index.html

  15. Sustainability • The amount of demand reduction can be precisely matched with the proper amount of dispatched IDG • Maximum efficiency of each IDG is maintained • IDG can be started and fully loaded within 30 seconds • Only small amounts of fuel are consumed without realizing power output and demand/load reduction. • IDG are considered spinning reserve while stopped! • Tremendous Green House Gas Savings and Carbon Footprint Reduction • Avoids 15% Reserve Capacity Over-Build Requirement

  16. Sustainability • IDGs can operate as bi-fuel • Use mixtures of diesel and clean-burn natural gas to reduce emissions • IDGs can utilize waste methane and biodiesel • IDGs can be fitted with selective catalytic reduction (SCR) to further limit emissions in regions where emissions are restricted • This is true for new installations and retrofitting of existing engine/gensets • IDG can be applied to firm Renewables

  17. Availability, Firmness, Reliability • Many IDGs have greater reliability than a small group of CTs • A failure of one or even a few IDGs only impacts the demand reduction capability associated with those failed systems…...the others relieve load. • IDG systems have an availability of over 96.5% [1] • CTs have typically an availability rate of 90-95% [2] • Monitoring keeps availability high • IDGs can pick up load in 30 seconds • IDGs use control implementations that will pick up as much of a Customers’ load as the generation will allow • Dynamic setpoint for non-export [1] PowerSecure operating experience from >850MW of aggregated IDG [2] European Commission Research; ftp://ftp.cordis.europa.eu/pub/eesd/docs/ev260901_poster_came-gt.pdf

  18. Prebound-Rebound Effect:Signaled Passive DR

  19. No Prebound-Rebound Effects:Signaled IDG-based DR

  20. Making IDG for DR Happen • Be open to it; employ a holistic view • Have rate structures and programs that support it • Shared Savings, Lease, other • Premium Power, Emergency Power, other Programs • Train CI&I Account Managers to suggest IDG as a rate reduction tool to Customers • Approach 24/7/365 power users for Greenfield or Harvesting applications • Data centers, hospitals, waste water, institutional, mission critical manufacturing, municipal services, hotels, food stores, refrigerated warehouses • Have DG interconnection processes in place

  21. Interactive Distributed Generation for Demand Response Town Meeting: July 13-14, Washington DC Interactive Distributed Generation for Demand Response Thank You Questions?

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