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WECC REMTF Generic Models Approved ( new ), under development

Western Electricity Coordinating Council Renewable Energy Modeling Task Force REMTF Report to MVWG Abraham Ellis, Sandia March 18, 2015 Salt Lake City, UT.

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WECC REMTF Generic Models Approved ( new ), under development

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  1. Western Electricity Coordinating CouncilRenewable Energy Modeling Task ForceREMTF Report to MVWGAbraham Ellis, SandiaMarch 18, 2015Salt Lake City, UT Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000.

  2. WECC REMTF Generic ModelsApproved (new), under development • WT1/2 wind plants • Inverter-based (PV, WT3/4 plants, storage) “Phase II” • Distributed PV All dynamic models except for CMPLDWG require explicitly generator representation in power flow

  3. Generic Energy Storage Model

  4. REEC_C: Energy Storage Module • Status: • Specifications • Testing • Implementation • MVWG technical spec approval • Add to WECC AML

  5. CMPLDWG: Distributed Generation • REMTF Recommendation/Request • Add hooks to allow different DG models (like PVDX) to be used with CMPLDWG

  6. Update PVDX Model? CA SIWG and CA Rule 21 Phase 1 Phase 2 Phase 3 • Items REMTF will consider: • Additional active power controls • Add time dimension to trip functions • Auxiliary input for other functionality • Would become PVD2

  7. Wind/PV Plant Control Model

  8. REPC_B: Enhanced Plant Controller • Adds new features • Interface with multiple WTGs • Interface with reactive support devices (MSC, SVC, synchronous condensers) • Plant level power factor control option • Expect approval item in June meeting

  9. PV/Wind Model Updates • Good models, but the existing MDF is deficient • Many Wind/PV plants modeled as synchronous generators or load-netted Example from 2022LSP High Renewables Case used in WWSIS III study: • 18GW modeled, 4.5 GW modeled as genrou or motor1, 2.5 GW load-netted • Most of the PV/wind (Type 3/4) plants in the MDF are modeled as WTXX (models being phased out) or GEXX (not an approved model) • Almost none of the wind/PV data in the MDB has been validated, some considered suspect • How can the current situation improve? • Information (validation guidelines, workshops, etc.) • Compliance enforcement with reasonable transition plan • Have patience

  10. Wind Model Validation at BPA • BPA effort had mixed results • Technical assistance needed • Previous work by an REMTF member on similar BPA data produced better results

  11. Model Validation Support • PV Plant Model Validation Guide under development • Document in late draft. Step-by-step procedure, example • Expect approval item in June meeting • Wind Plant Model Validation Guide is next • REMTF organizing a model validation webinar (June? Coordinate with SRWG workshop this summer?) • What else can REMTF/MVWG do? Map 1st Gen into 2nd Gen?

  12. REMTF Documentation • Technical specs, Application guides, Validation guides • Issue: updated documentation hard to find • Best way to handle would be a WECC.biz public folder • Recent IEEE papers (2015 PES GM)

  13. WECC Plan to Transition to New REXX Models • Eric Bakie’s Report (separate presentation) • WECC model transition is underway, but it will not be completed by June 2015, as planned last year. • What else can be done? • Move milepost and increase pressure? • WECC to migrate 1st Gen to 2nd Gen models without changing the ? • Intermediate step until model validation requirement catches up • REMTF/MVWG could come up with parameter lookup tables; software developers could automate • May not create data ownership if done right (preserve response) • There may be other prickly issues – need to look into it carefully!!!

  14. Limitation of Generic Models • Exploring numerical stability of positive-sequence simulation programs with respect to very high penetration scenarios and low SCR • On-going research project at Sandia • REMTF white paper on RE model limitations

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