IEEE P2797

This guide involves on-line monitoring of the ice on overhead lines (OHL), weather forecast, terrain identification, and icing prediction. It can serve the high-precision demands of forecasting line icing in specific micro-topographic areas during the design, operation, and maintenance of OHLs. This guide can also provide references for other industries like the communications industry. This guide intends to provide basic principles and recommended method to predict icing on overhead lines (OHL) in micro-topographic areas with high precision so as to ensure secure operation of OHLs in winter. Based on the results of on-line monitoring, micro-topography identification and high-precision meteorological forecast, this guide provides references for early warning of icing on OHLs, for selecting the best time of ice melting and for assessing icing risks to facilitate the design of OHLs in icing-prone areas. New IEEE Standard - Active - Draft. This guide is applicable to the prediction and early warning of icing on overhead transmission lines (OHLs) in micro-topographic areas, presenting criteria for identifying micro topographic areas and methods for predicting the icing thickness of OHLs. This guide aims to provide guidelines for the observation, monitoring, prediction, early warning, and melting of ice on OHLs in micro-topographic areas, serving as references for anti-icing design and maintenance of OHLs in icing prone areas.