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Congestion Management Working Group: Update to WMS

This update covers the recent discussions in the Congestion Management Working Group (CMWG) on dynamic line rating telemetry procedures and notice of GTLs related to new generation interconnections. Other topics include future CRR market updates and managing voltage stability limits.

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Congestion Management Working Group: Update to WMS

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  1. Congestion Management Working Group:Update to WMS Mark Soutter July 8th, 2015

  2. CMWG meeting of June 29th • Dynamic Line Rating Telemetry Procedures • Notice of GTLs Related to New Generation Interconnection • Other business • Future CRR market updates • Managing Voltage Stability Limits

  3. Dynamic Line Rating Telemetry Procedures • CMWG was tasked with reviewing current procedures and making suggestions for potential improvements • Current process: • Dynamic limits – static rating table modified by ambient conditions • Twice weekly, ERCOT tool looks for difference between dynamic ratings table and telemetry(looking for difference of more that 15%) • Temperature is not necessarily the only determinate for TSPs in real-time • Strain gauges, wind speed, wind direction can also be used • If ERCOT sees a constraint, the ratings are checked prior to activating the constraint

  4. Dynamic Line Rating Telemetry Procedures • Long term solution will be in place in August • Part of EMS R4 • Production tool will be doing a similar comparison, but will be running in real-time • As opposed to twice a week like the interim solution

  5. Notice of GTLs Related to New Generation Interconnection • CMWG will be circulating an Issues List via the email exploder • What should trigger a market notice • Which information should be included • What steps need to be taken to protect the Interconnecting Entity’s confidentiality • CMWG may propose a stand-alone PGRR to address the issue instead of through PGRR 044

  6. Other issues • LTAS results will be out on or before July 16th – the next CMWG update will include an analysis on the Impact of NPRR779 • Is there a way to give a proper price signal to folks who are solving a stability problem?

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