Quasi-dynamic line rating spatial and temporal analysis for network planning

This study proposes a methodology to design a quasi-Dynamic Line Rating, based on historical ampacity simulations using weather reanalysis. As opposed to the static rating, this implementation of qDLR varies the current-carrying limit every hour of every month, allowing a higher percentage of an overhead line's capacity to be utilized whilst reducing operational risk. The methodology proposed can be applied to an existing transmission or distribution overhead line to improve its performance or to a geographical region to support network planning. The application of the methodology on an example overhead line shows significant potential gains in transmission capacity, notably due to ampacity increases in the absence of solar radiation. The example also demonstrates better accommodation of low ampacity events during hot weather, potentially improving network operating safety. Its application on the regional level reveals potential ampacity bottleneck locations.