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ARTICLE · 23 FEBRUARY 2022

FERC Seeks Comment On Implementation Of Dynamic Line Ratings For Transmission Facilities

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On February 17, 2022, the Federal Energy Regulatory Commission (FERC) issued a Notice of Inquiry (NOI) on whether using "dynamic line ratings" (DLR) for electric transmission lines is necessary...

United StatesEnergy and Natural Resources
Scott Johnson
Scott Johnson
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On February 17, 2022, the Federal Energy Regulatory Commission (FERC) issued a Notice of Inquiry (NOI) on whether using "dynamic line ratings" (DLR) for electric transmission lines is necessary for just and reasonable wholesale transmission rates. Transmission line ratings "represent the maximum transfer capability of each transmission line," which can "change based on weather conditions"1 and can affect rates for transmission service. DLRs, in contrast to less sophisticated rating methods, represent how much electricity a given line can transmit based on a combination of factors like weather, tension and sag.2 More accurate and transparent ratings could increase grid efficiency, potentially reducing costs for customers. Accordingly, in the NOI, FERC requested comments on numerous topics, including "whether the lack of DLR requirements renders current wholesale rates unjust and unreasonable; potential criteria for DLR requirements; the benefits, costs, and challenges

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