PRC-010-0: Assessment of the Design and Effectiveness of UVLS Program
Purpose
Provide System preservation measures in an attempt to prevent system voltage collapse or voltage instability by implementing an Undervoltage Load Shedding (UVLS) program.
Applicability
- Load-Serving Entity that operates a UVLS program
- Transmission Owner that owns a UVLS program
- Transmission Operator that operates a UVLS program
- Distribution Provider that owns or operates a UVLS program
Effective Date
April 1, 2005
Requirements
R1. The Load-Serving Entity, Transmission Owner, Transmission Operator, and Distribution Provider that owns or operates a UVLS program shall periodically (at least every five years or as required by changes in system conditions) conduct and document an assessment of the effectiveness of the UVLS program. This assessment shall be conducted with the associated Transmission Planner(s) and Planning Authority(ies).
R1.1. This assessment shall include, but is not limited to:
R1.1.1. Coordination of the UVLS programs with other protection and control systems in the Region and with other Regional Reliability Organizations, as appropriate.
R1.1.2. Simulations that demonstrate that the UVLS programs performance is consistent with Reliability Standards TPL-001 0, TPL-002-0, TPL-003-0 and TPL-004-0.
R1.1.3. A review of the voltage set points and timing.
R2. The Load-Serving Entity, Transmission Owner, Transmission Operator, and Distribution Provider that owns or operates a UVLS program shall provide documentation of its current UVLS program assessment to its Regional Reliability Organization and NERC on request (30 calendar days). (Retirement approved by FERC effective January 21, 2014.)
Measures
M1. Each Transmission Owner’s and Distribution Provider’s UVLS program shall include the elements identified in Reliability Standard PRC-010-0_R1.
M2. Each Load-Serving Entity, Transmission Owner, Transmission Operator, and Distribution Provider that owns or operates a UVLS program shall have evidence it provided documentation of its current UVLS program assessment to its Regional Reliability Organization and NERC as specified in Reliability Standard PRC-010-0_R2. (Retirement approved by FERC effective January 21, 2014.)