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ERCOT Update to ROS NERC TPL-001-004 Sept 4, 2014

ERCOT Update to ROS NERC TPL-001-004 Sept 4, 2014. NERC TPL-001-004 implementation Jan 1, 2015. NERC TPL changes impacting Transmission Planners and Planning Coordinator (ERCOT) Implementation date Jan 1, 2015

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ERCOT Update to ROS NERC TPL-001-004 Sept 4, 2014

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  1. ERCOT Update to ROS NERC TPL-001-004 Sept 4, 2014

  2. NERC TPL-001-004 implementation Jan 1, 2015 • NERC TPL changes impacting Transmission Planners and Planning Coordinator (ERCOT) • Implementation date Jan 1, 2015 • In general the changes modify Planning Models, Steady-State Planning Analysis, Dynamic Planning Analysis, as well as introducing Short-Circuit Analysis, extended Outage impacts, and Spare equipment analysis • Numerous meetings conducted over the summer among TP’s and ERCOT to determine scope, interaction, and impacts of the NERC requirements • Consensus that most of the modeling and analysis changes should be made with modifications to existing guidelines for the SSWG, DWG, and SPWG • Agreement that most modeling and analysis are already being performed and only incremental revisions are needed • Some revisions will need to be promoted to a higher stakeholder level and included in Planning Guide revision • As the Planning Coordinator, ERCOT requests support of ROS to work with the individual working groups on the necessary coordination of guide revisions to achieve readiness in the November 2014 timeframe. • ERCOT will provide monthly updates of progress and issues to ROS though the end of the year.

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