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Craig L. Williams WECC Market Interface Manager

Craig L. Williams WECC Market Interface Manager. ECC Task Force Update UFAS Meeting January 26, 2012. USF / TLR Perspectives. UFAS document “Unscheduled Flow Mitigation Principles for Establishing an Effective Solution” October 1, 2009. Any solution for coordinated USF mitigation must:

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Craig L. Williams WECC Market Interface Manager

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  1. Craig L. WilliamsWECC Market Interface Manager ECC Task Force Update UFAS Meeting January 26, 2012

  2. USF / TLR Perspectives • UFAS document “Unscheduled Flow Mitigation Principles for Establishing an Effective Solution” October 1, 2009. • Any solution for coordinated USF mitigation must: • Foster efficient and economic development and use of the WECC interconnected system. • Be relatively simple to implement and administer • Be based on physical parameters that are measurable and monitored.

  3. USF / TLR Perspectives • Continued: • Be consistent with WECC Criteria. • Foster conditions under which transmission owners can maximize the use of the path capability. • Address long-term solutions including maintaining existing facilities and investing in new facilities. • Address USF in major and minor loops.

  4. USF / TLR Perspectives • “The Enhanced Curtailment Calculator (ECC) is a tool that is being proposed to calculate and disseminate curtailment responsibility electronically when requested by the transmission provider or the reliability coordinator. The tool would operate similar in function to webSAS, with several enhancements in calculation methodology. Additionally, the ECC would be more broadly applied to grid elements nominated by transmission providers or the reliability coordinator than webSAS. • The ECC will also provide curtailment responsibility for native/network or untagged flow impacts calculations which are not provided through webSAS. These added features will facilitate pro forma tariff compliance by transmission providers to perform pro rata curtailment calculations based on transmission service curtailment priority.

  5. USF / TLR Perspectives • To provide clarity to the ECC project, its scope, and potential member benefits; the development of tool specifications, discussion, and coordination are needed by subject matter experts. To that end we recommend that the Operations Committee and the Market Interface Committee establish a joint task force to further explore and develop the ECC proposal. The goal of the task force will be increased system consistency and reliability as the primary objective. If the ECC project is implemented the task force may become a Work Group and roles would need to be re-evaluated.”

  6. USF / TLR Perspectives • ECC Task Force Members • Brenda Ambrosi – BC Hydro • Carl Dobbs – WAPA CA • Raj Hundal – Powerex • David Lemmons – Xcel (Vice Chair) • David Lunceford - CAISO • Doug Reese – Tri-State • Linda Perez – WECC RC (Chair) • Jeff Sundvick – WECC RC (acting Chair)

  7. USF / TLR Perspectives • What does webSAS do and not do? • Does not calculate suggested tag curtailments with respect to transmission priority. • Can not account for sub-hourly schedules. • Does not determine generation to redispatch. • webSAS has the capability to perform webSDX-like interface but it is not currently used. • Does not interface with SCADA data and calculate information in near real-time.

  8. USF / TLR Perspectives • What do we want in the ECC Tool? • Ability to unload overloaded BES elements. • Ability to identify every cause for the overloading. • Ability to integrate load/generation forecasts. • Be predictive in nature; determine granularity. • PTDFs and OTDFs based on real-time conditions. - seamless integration with a central outage tool. • RC has sole oversight of the tool. • Ensure Transmission Priority is used for curtailments.

  9. Coordination of Roles and Responsibilities of UFAS & ECCTF Process to determine which nominated elements can be included in the ECC Tool. (ECCTF) Process to use the Qualified Devices during a UFMP. (UFAS) 2. Ability to add elements on the fly. (ECCTF) 3. Modeling of specific elements (including source/sink points) for TDF calculation. (ECCTF, e.g. continue using seasonal WECC planning model with monthly updates relative to any 100kv or higher element. Or, use WWSM, six-week uploads with real-time updates.) 4. Determination of minimum TDF and physical impact thresholds and how they are used for curtailment evaluation. (UFAS is addressing, ECCTF can review) 5. Impacts, quantification, and treatment of non-tagged system uses. (ECCTF) 6. Training process for WECC RC and WECC BA on new procedures. (ECCTF) 7. Process to update and provide real time information on outages and disturbances. (ECCTF)

  10. Craig L. Williams WECC Market Interface Manager Cell 801-455-9812 cwilliams@wecc.biz Questions?

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