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Enhanced Curtailment Calculator (ECC)

Learn about the history and proposed functionality of the Enhanced Curtailment Calculator (ECC), its interactions with scheduling, and its role in managing congestion and ensuring reliability. Addressing limitations of webSAS, ECC provides system awareness, outage information, and compliance with IRO and TOP standards.

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Enhanced Curtailment Calculator (ECC)

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  1. Jeremy WestSr. Operations Engineer Enhanced Curtailment Calculator (ECC)

  2. Learning Objectives • History behind need for ECC • Review ECC proposed functionality • ECC interactions with scheduling

  3. The Evolution of SOLs/IROLs in the West • Prior to 2011: • No IROLs identified in the West • RC and TOPs primarily focused on Major WECC Transfer Paths • Equipment/Facility ratings not considered SOLs • April 2012 – RC SOL Methodology revised • SOLs – facility ratings, bus voltage and stability limits • IROLs – process for identification • August 2013 – RC SOL Methodology second revision • Improve processes for determining IROLs • Greater emphasis on determining acceptable pre- and post- Contingency operating conditions

  4. Enhanced Curtailment Calculator (ECC)

  5. Enhanced Curtailment Calculator (ECC) • What issues does ECC address? • webSAS Limitations • UFMP restricted to 6 Qualified Paths • TDFs based on seasonal models • Increased system awareness • Visibility of untagged flows • Incorporation of outage info (gen and trans) • Compliance • Address IRO and TOP standards • Address September 8 event recommendations

  6. ECC Phase I • Provides situational awareness to RC • Current hour – uses SE for topology • Look ahead hours – starts with SE topology but adds generator and transmission outage data • Visualizes “layers” of impacts • e-Tags • Dynamic Transfers • Network & Native Load • Market Flows • ACE / RBC Flows • RSG Flows

  7. ECC Phase II • Implementation of FERC-approved curtailment methodology • Transition from webSAS to ECC for support of UFMP on 6 Qualified Paths • Redispatch and curtailment to manage congestion on defined elements as needed to support reliability • Collaborative effort with entities when implemented

  8. ECC Interactions with Scheduling • e-Tagging • Source/Sink Granularity BA A BA A BA B BA B = Contract (On) Path = Off Path

  9. ECC Interactions with Scheduling • Dynamic Transfers • Catalog Effort for Peak • Telemetry • Forecast Data • Dynamic Schedules – energy profile accuracy? • Pseudo-Ties – options e-Tag Build in ECC EIR Registration

  10. ECCTF • Task Force advising Peak on ECC • Reorganized under Peak MAC • Chair → Raj Hundal • Meetings open to public

  11. ECC Information https://www.peakrc.com/whatwedo/ECC/Pages/default.aspx

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