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Low-Voltage D.C. Workshop April 8, 2011

Low-Voltage D.C. Workshop April 8, 2011. American Electric Power Energy Storage Deployments. Emeka Okafor Research Programs. American Electric Power : Company Profile. The Evolution of the Electric Utility System. Before Smart Grid:

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Low-Voltage D.C. Workshop April 8, 2011

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  1. Low-Voltage D.C. WorkshopApril 8, 2011 American Electric Power Energy StorageDeployments Emeka Okafor Research Programs

  2. American Electric Power : Company Profile

  3. The Evolution of the Electric Utility System BeforeSmart Grid: One-way power flow, simple interactions, limited sources of renewable generation After Smart Grid: Two-way power flow, multi-stakeholder interactions, increased penetration of renewable generation Adapted from EPRI Presentation by Joe Hughes NIST Standards Workshop April 28, 2008

  4. Smart Grid Enables Energy Storage But where is the best location/size for the storage ? Adapted from EPRI Presentation by Joe Hughes NIST Standards Workshop April 28, 2008

  5. Energy Storage Options

  6. Tyler Mountain Feeder 46 kV bus 12 kV bus North Charleston Feeder 46kV/12kV Transformer 12/16/20 MVA Voltage Regulator West Washington Feeder AEP’s 1ST Substation Battery This First Utility-Scale NAS Project in the U.S. was Partially Funded by DOE/Sandia • 2006 • 1MW, 7.2 MWh of NaS battery • Deferred New Substation Chemical Station Charleston, W.VA. S&C AEP NGK

  7. - 1.0 MWDischarge 2008 2007 + 1.2 MW Charge AEP 2006 Project – Peak Shaving • Scheduled trapezoidal Charge & Discharge profiles • Summer Month Peak Days • Improved the feeder load factor by 5% (from 75% to 80%) 2006 Three Successful Years of Peak Shaving

  8. AEP Storage 2010 – 11MW, 75MWh 1 MW, 7.2 MWh installed in 2006 • Deferred substation upgrades • 3 - 2MW,14.4 MWH Commissioned in 2009 • Implemented“Load Following” • Demonstrated “Islanding (Backup Power)” • 4MW, 25MWh substation on-line in 2010 The New “Islanding” feature is Partially Funded by DOE/Sandia

  9. Load Following Peak Shaving Circuit Demand

  10. Churubusco, IN: Battery Islanding Zones. Station

  11. Islanding (Backup Power) Events

  12. Community Energy Storage (CES) CES is a fleet of small distributed energy storage units connected to the secondary of transformers serving a few houses controlled together to provide feeder level benefits. 25 KVA Functional Specifications for CES are “OPEN SOURCE” In 2009 EPRI hosted open webcasts to solicit industry wide input. www.aeptechcenter.com/ces

  13. CES – Benefits to the Customer CES is Operated as a Fleet offering a Multi-MW, Multi-hour Storage • Local Benefits: • 1) Backup Power • 2) Renewable Integration • 3) Voltage correction Substation CES Power Lines Communication and Control Links

  14. Integration Utility Dispatch Platform Center /SCADA CES – A Virtual Substation Battery CES is Operated as a Fleet offering a Multi-MW, Multi-hour Storage • Grid Benefits: • 4) Load Leveling at substation • 5) Power Factor Correction • 6) Ancillary services • Local Benefits: • 1) Backup Power • 2) Renewable Integration • 3) Voltage correction CES Control Hub Communication & Control Layout for CES Substation CES CES CES CES Power Lines Communication and Control Links

  15. North CES: AEP Ohio gridSMARTSM Demonstration • CES: 2MW/2MWh; Fleet of 80 25-kW Units • Circuit: Morse Rd 5801; 13 kV, 6.3 MVA Peak Load, 1742 customers • Coverage: Approximately 20% of customers • Schedule: Mar 2011 Prototype Testing Dec 2011 2MW Deployment • Status: Mar 2011 – 2 Prototypes being tested at AEP’s Dolan Technology Center. Morse Rd 5801

  16. Prototype testing at Dolan Technology Center

  17. Mock installation at AEP’s Dolan Technology Center CES Unit Ground Level Mock installation at AEP’s Dolan Technology Center Battery Case Battery Sleeve Simulated Image from S&C Electric Company

  18. CES – NE Columbus Project Benefits.

  19. Feeder Load CES # 1 CES # 2 Trigger Level for Charge CES # 3 Trigger Level for Discharge CircuitFeeder’s charge and discharge needs are assessed periodically and divided among CES Units on the circuitfeeder Evening Morning Noon Midnight Load Leveling – Spread Across the CES Fleet Feeder level demand profile showing CES Unit charge and discharge

  20. TECHNOLOGY Validate energy storage technology can meet grid requirements Three Tiers for Sustainable Energy Storage Deployments BUSINESS PLAN REGULATORY Credible financial benefit to customers Ensure favorable rate recovery treatment Sustainable Future Deployments

  21. Conclusion • Successful deployment of Energy Storage Systems • AEP’s current Energy Storage strategy is focused primarily on Community Energy Storage. • Energy Storage System Cost must reduce significantly to become economically justifiable for utility deployment. • Market predictions indicate that near-term costs for energy storage may broaden deployment opportunities.

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