{"id":24498,"date":"2025-01-22T14:50:06","date_gmt":"2025-01-22T14:50:06","guid":{"rendered":"https:\/\/www.trccompanies.com\/?post_type=news-and-insights&p=24498"},"modified":"2025-02-07T20:05:15","modified_gmt":"2025-02-07T20:05:15","slug":"nerc-approves-new-extreme-weather-planning-standard","status":"publish","type":"news-and-insights","link":"https:\/\/www.trccompanies.com\/insights\/nerc-approves-new-extreme-weather-planning-standard\/","title":{"rendered":"NERC Approves New Extreme Weather Planning Standard"},"content":{"rendered":"\n\n
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On December 10, 2024, <\/span>NERC\u2019s <\/span>Board of <\/span>T<\/span>rustees approved <\/span>standard <\/span>TPL-008-1<\/span> Transmission System Planning Performance Requirements for Extreme Temperature Events.<\/span> The <\/span>petition to approve the TPL-008-1 <\/span>standard was filed with <\/span>the <\/span>Federal Energy Regulatory Commission (<\/span>FERC<\/span>)<\/span> on December <\/span>17<\/span>, <\/span>2024<\/span> and will <\/span>initiate<\/span> the implementation<\/span> plan<\/span> upon final approval<\/span>.<\/span><\/span>\u00a0<\/span><\/p>\n

TPL-008-1 Development Background<\/span>\u00a0<\/span><\/h3>\n

In 2023 FERC directed NERC to develop a new Reliability Standard or modifications to Reliability Standard TPL-001-5.1 that would address concerns pertaining to transmission system planning for extreme heat and extreme cold temperature events that included:\u00a0<\/span><\/p>\n

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  1. The development of benchmark planning cases based on major prior extreme heat and cold weather events and\/or meteorological projections.<\/li>\n
  2. Planning for extreme heat and cold weather events using steady-state and transient stability analyses expanded to cover a range of extreme weather scenarios including the expected resource mix’s availability during extreme heat and cold weather conditions, and the wide-area impacts of extreme heat and cold weather.<\/span><\/li>\n
  3. Development of corrective action plans that mitigate instances where performance requirements are not met for extreme heat and cold weather events.<\/li>\n<\/ol>\n

    New Requirements Proposed<\/span><\/span>\u00a0<\/span><\/h3>\n

    Reliability Standard TPL-008-1 focuses on improving how Planning Coordinators and Transmission Planners prepare for the potential reliability performance impacts of extreme heat and extreme cold temperature events on the reliable operation of the Bulk-Power System. <\/span>\u00a0<\/span><\/p>\n

    It consists of 11 requirements, calling for the performance of periodic studies assessing the wide-area impacts of extreme heat and extreme cold temperature events on the Bulk-Power System. These periodic studies are referred to as \u201cExtreme Temperature Assessments\u201d which will become a defined term in the NERC Glossary of Terms.\u00a0<\/span>\u00a0<\/span><\/p>\n

    \"\"<\/a><\/p>\n

    Extreme Temperature Assessment \u2013 Documented evaluation of future Bulk Electric System performance for extreme heat and extreme cold benchmark temperature events.<\/span>\u00a0<\/span><\/p>\n

    Proposed Reliability Standard TPL-008-1 requires entities in a planning zone, a region defined in Attachment 1 to the standard, to coordinate with each other on the development of Extreme Temperature Assessments. <\/span>The need for Extreme Temperature Assessments will be a NERC Standard Requirement once TPL-008-1 is approved and the standard is fully implemented. Planning Coordinators and Transmission Planners should prepare to incorporate Extreme Temperature Assessments into their planning and power system studies. <\/span><\/p>\n

    If the required experience for conducting the assessments is not in house, a third-party such as TRC is more than equipped with the expertise to do so on your behalf.<\/span>\u00a0<\/span>The new definition identifies Weather Zones<\/a> to provide guidance regarding the extent of the weather assessments and geographical areas where collaboration is expected.<\/span>\u00a0<\/span><\/p>\n

    The proposed standard includes several key requirements.\u00a0<\/span>\u00a0<\/span><\/p>\n