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Volume XIII, Number 90

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FERC Proposes to Approve Regional Underfrequency Load Shedding Reliability Standard

In a Notice of Proposed Rulemaking issued on September 20, 2012, FERC proposed to approve the Northeast Power Coordinating Council’s (NPCC’s) Regional Reliability Standard on Underfrequency Load Shedding (UFLS). The proposed PRC-006-NPCC-1 Regional Reliability Standard (Regional Standard) would address declining system frequency events in coordination with the existing continentwide PRC-006-1 UFLS Standard.

The Regional Standard contains 23 requirements, including a threshold for setting underfrequency trip protection for generators in the NPCC Region. The Regional Standard follows the existing NPCC Directory #12 Underfrequency Load Shedding Program Requirements, which have governed NPCC’s automatic UFLS programs since 2009. The Regional Standard is intended to accommodate the differences in transmission and distribution topology between NPCC Planning Coordinators caused by their historical design criteria, their load demands, and their generation resources. FERC concluded that the Regional Standard is stricter than the continentwide standard because it provides more specific requirements, such as a requirement for nonnuclear owners to have compensatory load shedding to compensate for the loss of their generation due to early tripping.

FERC sought comments on (1) the technical basis for the 57.8 Hz maximum tripping limit for existing nuclear units established in requirement R19 and (2) the timeframes for actions that result in changes to the NPCC UFLS program.

FERC proposed to approve the effective dates requested by NERC. Requirements R1 through R7 would become effective on the first day of the first calendar quarter after regulatory approval, but no earlier than January 1, 2016, to accommodate the six-year implementation period in NPCC Directory #12. Requirements R8 through R28 would become effective on the first day of the first calendar quarter two years after regulatory approval.

Copyright © 2023 by Morgan, Lewis & Bockius LLP. All Rights Reserved.National Law Review, Volume II, Number 279
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About this Author

John McGrane, Morgan Lewis, Energy attorney
Partner

John D. McGrane brings more than 35 years of experience to advising electric utilities and other participants in the electric power industry on electric regulation and transactions. John has experience in electric power and transmission issues, and is particularly active in audits and investigations by the US Federal Energy Regulatory Commission (FERC) and the North American Electric Reliability Corporation relating to electric regulation and reliability.

202-739-5621
Stephen Spina, Morgan Lewis, Energy attorney
Partner

Stephen M. Spina represents electric utilities and other electric industry participants before the Federal Energy Regulatory Commission (FERC) in restructuring, market investigations, and Federal Power Act regulatory matters. He advises electric utilities on issues relating to market pricing, transmission, reliability standards compliance, rate matters, and participation in regional transmission organizations, including capacity and energy market issues. His representation also extends to audits and investigations before FERC’s Office of Enforcement, as well as...

202-739-5958
J. Daniel Skees, Energy attorney, Morgan Lewis
Partner

J. Daniel Skees represents electric utilities before the Federal Energy Regulatory Commission (FERC) and other agencies on rate, regulatory, and transaction matters. He handles rate and tariff proceedings, electric utility and holding company transactions, reliability standards development and compliance, and FERC rulemaking proceedings. The mandatory electric reliability standards under Section 215 of the Federal Power Act are a major focus of Dan’s practice. He advises clients regarding compliance with reliability standards, and helps them participate in the...

202-739-5834