PRC-008-0: Underfrequency Load Shedding Equipment Maintenance Programs

Purpose
Provide last resort system preservation measures by implementing an Under Frequency Load Shedding (UFLS) program.

Applicability

  • Transmission Owner required by its Regional Reliability Organization to have a UFLS program
  • Distribution Provider required by its Regional Reliability Organization to have a UFLS program

Effective Date
April 1, 2005

Requirements
R1. The Transmission Owner and Distribution Provider with a UFLS program (as required by its Regional Reliability Organization) shall havea UFLS equipment maintenance and testing program in place. This UFLS equipment maintenance and testing program shall include UFLS equipment identification, the schedule for UFLS equipment testing, and the schedule for UFLS equipment maintenance.

R2. The Transmission Owner and Distribution Provider with a UFLS program (as required by its Regional Reliability Organization) shall implement its UFLS equipment maintenance and testing program and shall provide UFLS maintenance and testing program results to its Regional Reliability Organization and NERC on request (within 30 calendar days).

Measures
M1. Each Transmission Owner’s and Distribution Provider’s UFLS equipment maintenance and testing program contains the elements specified in Reliability Standard PRC-008-0_R1.

M2. Each Transmission Owner and Distribution Provider shall have evidence that it provided the results of its UFLS equipment maintenance and testing program’s implementation to its Regional Reliability Organization and NERC on request (within 30 calendar days).


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