NPRR968  Revise EEA Level 3 Triggers from 1375 MW to 1430 MW to Align with New Most Severe Single Contingency Value

This Nodal Protocol Revision Request (NPRR) updates Protocol language for compliance with North American Electric Reliability Corporation (NERC) Reliability Standards BAL-002-3, Disturbance Control Standard – Contingency Reserve for Recovery from a Balancing Contingency Event, and EOP-011-1, Emergency Operations. The proposed language changes the Physical Responsive Capability (PRC) trigger for Energy Emergency Alert (EEA) Level 3 to match a new Most Severe Single Contingency (MSSC) of 1,430 MW, which ERCOT intends to implement on January 1, 2020. ERCOT is updating the MSSC value from the former value of 1,375 MW to more accurately reflect the expected impact of the loss of either of the South Texas Project nuclear generating units, based on additional data ERCOT has obtained. Attachment 1 of EOP-011-1 requires ERCOT to declare an EEA Level 3 if it is unable to maintain PRC above its minimum contingency reserve requirement, which is defined in Requirement R2 of BAL-002-3 to be the MSSC. ERCOT will modify its Operating Procedures and processes following the approval of this NPRR.