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Integrating Renewables into the Electricity Grid-Tariff & Market Issues

Integrating Renewables into the Electricity Grid-Tariff & Market Issues. EBA Mid-Year Meeting 12/3/2009 Associated Electric Cooperative, Inc. Kevin Hopper, P.E. Manager, Transmission Planning. When’s the last time you flipped a light switch and got a busy signal?.

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Integrating Renewables into the Electricity Grid-Tariff & Market Issues

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  1. Integrating Renewables into the Electricity Grid-Tariff & Market Issues EBA Mid-Year Meeting 12/3/2009 Associated Electric Cooperative, Inc. Kevin Hopper, P.E. Manager, Transmission Planning

  2. When’s the last time you flipped a light switch and got a busy signal? U.S. electricity consumers demand a higher degree of reliability than from any other system.

  3. We’ve been asked to discuss the following: • Will renewable generators… • be compensated for their availability during peak periods? • be required to provide reactive power? • be dispatched in the same manner as non-renewable resources? • Will new energy products need to be developed to reflect the variable nature of renewable resources, and, if so, what types of products? First an introduction…..

  4. Associated Electric Cooperative generates power for 875,000 consumers (more than 2 million people) AECI’s mission is to provide an economical and reliable power supply and support services to its members.

  5. GAS/OIL peaking 655 MW Essex - 107 MW Nodaway - 182 MW Holden - 321 MW Unionville - 45 MW GAS combined-cycle 1,603 MW – 2,143 in early 2011 Dell - 580 MW St. Francis - 501 MW Chouteau - 522 MW COAL 2,619 MW Thomas Hill - 1,153 MW New Madrid - 1,200 MW GRDA Unit 2 -198 MW Chamois -68 MW HYDROELECTRIC 478 MW WIND GENERATION 157 MW – 307 in early 2010 AECI uses a mix to ensure members don’t get a busy signal

  6. RenewableTechnologiesWe’veStudied/Looked At

  7. Landfill Gas….

  8. ……Chicken Poop

  9. ….Wood Waste Biomass

  10. …..Solar

  11. …..Pumped Storage

  12. And A Crazy Little Thing Called……Wind!

  13. Renewable Generation Technologies We Use on a Daily Basis, Maybe:

  14. Should renewable generators be compensated for their availability during peak periods?

  15. Member Load and Wind Generation For hour ending 1700, AECI’s peak was 4,189 MW and the 157 MW of wind farms were generating 2 MW.

  16. August 2009

  17. Source: Mark Kapner, P.E., Austin Energy, World Energy Engineering Conference

  18. Source: Mark Kapner, P.E., Austin Energy, World Energy Engineering Conference

  19. Renewables compensated during peak? Yes, like all generators, but: Don’t count on the renewables being there.

  20. Should renewable generators be required to provide reactive power?

  21. Yes! • Just like all generators – compen-sated as well. • Can be in their best interest.

  22. Should renewable generators be dispatched in the same manner as non-renewable resources?

  23. AECI Lsub10 51.07 MW AECI Spinning reserve ~ 45 MW

  24. Source: Mark Kapner, P.E., Austin Energy, World Energy Engineering Conference

  25. System Control - Ramping • Ramping probably is the largest issue with high penetration of renewable generation • Accurate load forecasting is a necessity for proper system operations • Control of Renewable Resources is critical for the System Operator: • Impose Ramp Limits? • Partial or full curtailments • Actions taken in a timely manner for operations

  26. Should renewables be dispatched in the same manner as non-renewables? Maybe. • Huge difference in availability. • Ramping issues give operators grey hair – what about minimums/reliability?

  27. Will new energy products need to be developed? If so, what? Absolutely, yes!

  28. The Search for the Energy Holy Grail? Cost Effective Large Scale Energy Storage

  29. Conclusions • Significant changes will need to take place for high levels of renewable generation on the system: • Dynamic Line Ratings, increase transfer capability • Cycling of traditional generation, quick start available • Maximum control of renewable generation (ramp rate, freq. response, curtailments, voltage control) • Energy Storage solutions • PHEV • SmartGrid • Nuclear

  30. QUESTIONS??

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