Influence of the wind variability on the calculation of dynamic line rating

This paper presents a novel technique to calculate the ampacity of an overhead transmission line in real time, considering the dynamic evolution of the conductor temperature. In case this method cannot be applied due to lack of adequate information, a correction is proposed for the maximum current, based on Monte Carlo simulations assuming unfavorable external conditions, and validated with real data from a weather station. This technique might be used to avoid the temporary violation of the minimum electrical clearance in transmission lines. •Variability of weather conditions affects the DLR calculated with low sample rates.•A method is proposed to correct the ampacity calculated with usual techniques.•The presented correction coefficient is calculated using Monte Carlo simulations.•The good performance of the proposed technique is tested with real data.•The proposed method might contribute to a more secure operation of the lines.