Adaptive Static Line Rating for Systems with HTLS Conductors
Albizu Flórez, Igor
Fernández Herrero, Elvira
Bedialauneta Landaribar, Miren Terese
Mazón Sainz-Maza, Angel Javier
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IEEE Transactions on Power Delivery (2018)
Operation and planning of a power system are constrained by the rating of power lines. Usually, the static line rating is used for system operation and planning. The static line rating defined for an electric grid uses the same conservative weather assumptions for the whole grid regardless of the location of each line or its maximum-allowable conductor temperature. A separate analysis of the weather magnitudes measured in a pilot line shows how favorable air temperature and solar heating compensate for unfavorable wind speed. However, this compensation is limited for high maximum-allowable conductor temperatures. As a result, the risk of the static line rating exceeding this maximum temperature is higher for HTLS conductors. An adaptive static line rating is proposed to control the assumed risk. The wind speed assumption for the static rating is reduced for higher maximum-allowable conductor temperature.