NOTICE DATE: April 2, 2018

NOTICE TYPE: W-A011918-02 Operations

SHORT DESCRIPTION: Update - Communication of System Operating Limits Methodology for the Planning and Operations Horizons

INTENDED AUDIENCE: NERC-registered Transmission Operators and Transmission Planners

DAY AFFECTED: April 2, 2018

LONG DESCRIPTION: ERCOT ISO, as the Reliability Coordinator and Planning Authority, is required to issue any changes to its System Operating Limit Methodology to any Transmission Operator or Transmission Planner in its area. Attached is a new revision to the ERCOT planning horizon and operations horizon System Operating Limit (SOL) methodology, based on comments received from commenters and additional review since the previous Market Notice (W-A011918-01) on January 19, 2018. This version is effective on April 2, 2018.

ADDITIONAL INFORMATION: The new version of this methodology is posted on the ERCOT Market Information System (MIS) on the Grid – Long-Term Planning page in the Long-Term Planning Methodologies portlet in the ERCOT System Operating Limit (SOL) Methodology link

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

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