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CMWG Update to WMS. 6-14-11. Discussions. Balance of Year CRR auction Worked well, with exception that bids cleared were significantly below 200,000 limit (due to process for round 2 of CRR auction) Valley Import

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Presentation Transcript

Discussions
Discussions

  • Balance of Year CRR auction

    • Worked well, with exception that bids cleared were significantly below 200,000 limit (due to process for round 2 of CRR auction)

  • Valley Import

    • ERCOT characterized current operation of Valley import as being based on thermal limit of 1100 MW—noting that the stability limit is very close to this level

    • For further discussion

      • Thermal vs stability limit operation -- relationship

      • Which limit was used by ERCOT to establish the SP Cap?


Wms assignment to cmwg from tac
WMS Assignment to CMWG from TAC

  • What can we identify in planning criteria to help us avoid Valley Issues in Future

  • “…recommend that a process be developed to address the gap between operations and planning processes to identify such constraints…”

  • Discussion about documenting TO planning criteria (similarities/differences)

  • Differences in how stability limits are studied in planning vs. how used in ops (w/ “margin”)


Plwg cmwg activities for ongoing coordination between planning rt
PLWG/CMWG Activities for Ongoing Coordination between Planning & RT

  • Load Variability

  • Thermal Generation Availability

  • Ancillary Service

  • Transmission Maintenance Outages

  • Wind

  • Dynamic Line Ratings

  • Long Term Auto Outages

  • Operational Safety Margin (for Interface limits)


Next steps
Next Steps Planning & RT

  • Recommend WMS/ROS ask for review of how 6.5.9.2 applies (or not) to congestion irresolvable by SCED

  • CMWG/PLWG review of ongoing revisions to Planning Guides

  • Next meeting PLWG/CMWG 7/1,

  • Upcoming CMWG issues—obligations for 2011 CRR auction


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