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COI Coordination

COI Coordination. Panel: Bonneville Power Administration California ISO. COI Coordination. COI Coordination. Coordination On-going and Evolving. COI Coordination. Multiple Actors Path Operators CAISO - south of COB BPA - north of COB Facility Owners

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COI Coordination

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  1. COI Coordination Panel: Bonneville Power Administration California ISO

  2. COI Coordination

  3. COI Coordination Coordination On-going and Evolving

  4. COI Coordination Multiple Actors • Path Operators • CAISO - south of COB • BPA - north of COB • Facility Owners • PG&E, PAC, WAPA (PACI); TANC, WAPA, Munis, PG&E (COTP) – south of COB • BPA; PGE; PAC – north of COB • Various Capacity Owners (COs) • Balancing Authorities • CAISO (PACI); BANC (COTP) • BPA; PGE; PAC

  5. COI Coordination Coordinated Operation • Outage coordination • BPA coordinates outages north of COB, including arranging for necessary studies. • CAISO coordinates outages south of the border, and the necessary studies. • BPA and CAISO attempt to coordinate and schedule outages during periods that the other entity plans major outages.

  6. COI Coordination Coordinated System Operating Limits • BPA is responsible for monitoring system conditions north of COB • CAISO is responsible for monitoring system conditions south of COB • Lowest limiting element (equipment) sets the COI SOL • Limitations due to outages • Nomograms • Simultaneous operating constraints among various paths • Generation north and south of COB • Load levels • Temperatures

  7. COI Coordination • Interaction from other WECC Paths, for example • Reno - Alturas (NW - Sierra Pacific) • Hemmingway - Summer Lake (PAC – IPC) • Northern California Generation • Existing ~4100 MW Hydro generation • New generation • ~1200 MW new thermal generation • ~200MW new wind generation

  8. COI Coordination • SOL Determination • BPA prepares 2-week ahead studies to determine SOL; • Updates SOL for system conditions on Pre-schedule day; • Additional updates on Real Time day if changes to system conditions require.

  9. COI Coordination Coordinated Curtailments – In-hour curtailments • Scheduling Shares allocated by percentage share of SOL • PGE; PAC; BPA (BPA/COs), north of COB • CAISO; BANC, south of COB • BPA (sink operator) initiates curtailments on S>N SOL flows • Notifies PAC, PGE and CO partners of adjusted allocated SOL shares • Partners are responsible for curtailments on their respective shares • BPA implements curtailments to remaining BPA share (pro rata by NERC priority product – NS-1; NF-2; 7-F) • CAISO (sink operator) initiates curtailments on N>S SOL flows • CAISO explanation • After CAISO curtailments, if above its SOL share BPA may further curtail to get under its SOL share • Ultimately, Path operators have responsibility to take whatever actions are necessary to get under SOL within 30 minute limit

  10. COI Coordination Coordinated Curtailments – Next hour reductions • Partners responsible to assure schedules not in excess of allocated share of SOL • Coordination between BPA and CAISO less formal • If excess quantity large, generally entity that needs to reduce more goes first; • If excess quantity small (i.e., due to late firm pick-ups, BPA likely to implement reductions on its allocated share (NF, reduced LIFO; Firm reduced pro rata).

  11. COI Coordination For more detail, see “COI Utilization Report,” May 04, 2011, prepared by the Transmission Utilization Group • http://transmission.bpa.gov/Customer_Forums/tug/documents/coi_utilization_report.pdf

  12. COI Coordination QUESTIONS?

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