NPRR1034  Frequency-Based Limits on DC Tie Imports or Exports

This Nodal Protocol Revision Request (NPRR) creates new Protocol Section 4.4.4.3, Frequency-Based Limits on DC Tie Imports or Exports to allow ERCOT to establish import or export limits on Direct Current Ties (DC Ties) to avoid the risk of any unacceptable frequency deviation that may be identified in the event of an unexpected loss of one or more DC Ties when importing or exporting. Revisions to Section 4.4.4, DC Tie Schedules, would allow ERCOT to curtail DC Tie Schedules on a DC Tie on a last-in-first-out basis when necessary to address this risk. The last-in-first-out curtailment methodology is consistent with current practice documented in the ERCOT DC Tie Operating Procedure Manual. ERCOT would be required to post on the Market Information System (MIS) Public Area the operating conditions and associated limits that it would expect to use.