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PRC-006-2: Automatic Underfrequency Load Shedding

Purpose

To establish design and documentation requirements for automatic underfrequency load shedding (UFLS) programs to arrest declining frequency, assist recovery of frequency following underfrequency events and provide last resort system preservation measures

Applicability

4.1. Planning Coordinators

4.2. UFLS entities shall mean all entities that are responsible for the ownership,

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PRC-023-3: Transmission Relay Loadability

Purpose
Protective relay settings shall not limit transmission loadability; not interfere with  system operators’ ability to take remedial action to protect system reliability and; be set to reliably detect all fault conditions and protect the electrical network from these faults.

Applicability
4.1.

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PRC-017-0: Special Protection System Maintenance and Testing

Purpose
To ensure that all Special Protection Systems (SPS) are properly designed, meet performance requirements, and are coordinated with other protection systems. To ensure that maintenance and testing programs are developed and misoperations are analyzed and corrected.

Applicability

  • Transmission Owner that owns an SPS
  • Generator Owner that owns an SPS
  • Distribution Provider that owns an SPS

Effective Date
April 1,

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PRC-016-0.1: Special Protection System Misoperations

Purpose
To ensure that all Special Protection Systems (SPS) are properly designed, meet performance requirements, and are coordinated with other protection systems. To ensure that maintenance and testing programs are developed and misoperations are analyzed and corrected.

Applicability

  • Transmission Owner that owns an SPS
  • Generator Owner that owns an SPS
  • Distribution Provider that owns an SPS

Effective Date
May 13,

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PRC-021-1: Under-Voltage Load Shedding Program Data

Purpose
Ensure data is provided to support the Regional database maintained for Under- Voltage Load Shedding (UVLS) programs that were implemented to mitigate the risk of voltage collapse or voltage instability in the Bulk Electric System (BES).

Applicability

  • Transmission Owner that owns a UVLS program.

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PRC-022-1: Under-Voltage Load Shedding Program Performance

Purpose
Ensure that Under Voltage Load Shedding (UVLS) programs perform as intended to mitigate the risk of voltage collapse or voltage instability in the Bulk Electric System (BES).

Applicability

  • Transmission Operator that operates a UVLS program.
  • Distribution Provider that operates a UVLS program.

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PRC-023-2: Transmission Relay Loadability

Purpose
Protective relay settings shall not limit transmission loadability; not interfere with  system operators’ ability to take remedial action to protect system reliability and; be set to reliably detect all fault conditions and protect the electrical network from these faults.

Applicability

  • Functional Entity
    • Transmission Owners with load-responsive phase protection systems as described in PRC-023-2 –

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PRC-015-0: Special Protection System Data and Documentation

Purpose
To ensure that all Special Protection Systems (SPS) are properly designed, meet performance requirements, and are coordinated with other protection systems. To ensure that maintenance and testing programs are developed and misoperations are analyzed and corrected.

Applicability

  • Transmission Owner that owns an SPS
  • Generator Owner that owns an SPS
  • Distribution Provider that owns an SPS

Effective Date
April 1,

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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,

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PRC-006-SERC-01:Automatic Underfrequency Load Shedding Requirements

Purpose
To establish consistent and coordinated requirements for the design, implementation, and analysis of automatic underfrequency load shedding (UFLS) programs among all SERC applicable entities.

Applicability

  • Planning Coordinators
  • UFLS entities shall mean all entities that are responsible for the ownership, 

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