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Heidi Pacini Staff Engineer

Heidi Pacini Staff Engineer. TEPPC Pumped Storage Modeling August 25, 2011 HMTF Conference Call. Pumped Storage Plants in the TEPPC 2020 Dataset. Existing AZ: Horse Mesa, Mormon Flat CA: Castaic, Eastwood, Helms, San Luis

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Heidi Pacini Staff Engineer

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  1. Heidi PaciniStaff Engineer TEPPC Pumped Storage Modeling August 25, 2011 HMTF Conference Call

  2. Pumped Storage Plants in the TEPPC 2020 Dataset • Existing • AZ: Horse Mesa, Mormon Flat • CA: Castaic, Eastwood, Helms, San Luis • CO: Cabin Creek, Mount Elbert, Northern CO Water Conservatory District Pump • Under Construction • CA: Hodges-Olivenhain Pump Storage

  3. Pumped Storage Model Inputs • Min/maxpumping capacity • Min/max generating capacity • Capacity segments between min/max • Input/output efficiency • Energy needed to fill reservoir • Minimum reservoir level • Type of refill cycle (daily/weekly) • Contribution to spinning reserve (No) • Minimum savings required Inputs in green are currently being used within the model

  4. Pumped Storage Operating Mode • User may define which hours are to be used for pumping/generating • Can define each hour of the week • Can define weeks differently • Currently, all hours are set to economic (i.e. decision to pump or generate is based on price signals) • Local LMP price • Computed after preliminary dispatch of thermal units

  5. Pumped Storage Optimization • Minimize the cost of meeting load subject to: • The efficiency of the plant • Min/max reservoir levels • Operating min/max capacities

  6. Plant Inputs in the TEPPC Dataset

  7. Plant Operation in 2020 PC1

  8. Plant Operation in 2020 PC1

  9. Model versus Actual Operation - Castaic Other inputs to consider: Daily vs. weekly refill cycle? Contribute to reserves? Set schedule?

  10. Model versus Actual Operation - Helms Other inputs to consider: Daily vs. weekly refill cycle? Contribute to reserves? Yes

  11. Model versus Actual Operation - Eastwood Other inputs to consider: Daily vs. weekly refill cycle? Contribute to reserves? Set schedule? Doesn’t appear to have a consistent schedule

  12. Model versus Actual Operation – San Luis Reservoir • US Bureau of Reclamation Fact Sheet Other inputs to consider: Daily vs. weekly refill cycle? Weekly Contribute to reserves? No Set schedule? Yes

  13. Model versus Actual Operation – Mount Elbert • USBR Fact Sheet Other inputs to consider: Daily vs. weekly refill cycle? Contribute to reserves? Yes Set schedule?

  14. Remaining Pumped Storage Plants • Please send any information you may have on the following plants to the staff: • CA: Hodges-Olivenhain Pump Storage • CO: Cabin Creek, Northern CO Water Conservatory District Pump • Are there other existing pumped storage plants missing from the TEPPC dataset? • If so, please send any information you may have to the staff

  15. Future Pumped Storage Projects • Future pumped storage project reported to LRS: • Upgrade to Castaic • Iowa Hill (SMUD) • WECC Class Code 4 (not typically added to TEPPC datasets) • Proposal – Model any additional proposed PS projects in expansion cases when congestion is identified and could be mitigated by a particular project • See pumped storage projects identified in 2011 Study Program

  16. Heidi Pacini Staff Engineer Western Electricity Coordinating Council hpacini@wecc.biz (801) 819-7610 Questions?

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