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Project: T183700 #3136

Best practices are provided herein for Utilities to fulfill compliance with NERC TPL-001-4 Reliability Standard requirements. The identified best practices were derived from a wide sampling of Utilities. The NERC TPL-001 Reliability Standard was written to promote improvement in the reliability of the Bulk Electric System. This report presents the additional requirements from version 4 of the Standard and the process followed by Utilities to show compliance with TPL- 001-4, which is generally done by audits conducted by the NERC Regional Reliability Councils.

The report identifies best practices among many Utilities to comply with NERC TPL-001-4, including all eight requirements in the standard, namely: System Modeling (R1), Study Assumptions (R2), Steady State Results (R3), Stability Results (R4), Voltage Response Criteria (R5), System Instability Criteria (R6), Planning Coordinators and Transmission Planners responsibilities (R7) and Distribution of Planning Assessment to Adjacent Areas (R8).

The opinions of many Utilities within the Industry about the relative effectiveness of the required standard are gathered and summarized by key areas, such as: process for conducting the annual transmission planning study, use of load shedding as a corrective action plan, selection of extreme events contingencies and the rationale behind them.

This report also summarizes the opinion of many electric power utilities with respect to TPL-001-4 and areas of opportunity for future versions. Official procedures so Utilities can suggest improvements/changes to any NERC standard for review are also mentioned. Finally, this report describes the governance structure and high-level processes followed by jurisdictions where bulk transmission systems are planned and operated outside the USA, Europe and Latin America.


NERC, TPL-001-4, Transmission Planning, Contingency Analysis, Extreme Event Contingencies, Angular Stability Criteria, Voltage Stability Criteria, Planning and Coordination with other utilities, System Modeling, Transmission Annual assessments.