Вплив параметрів силових трансформаторів розрахунок струмів коротких замикань

Abstract

The influence of power transformer parameters on the accuracy of short-circuit current calculations in electrical networks was investigated. Methods for determining short-circuit currents based on transformer passport data were analyzed and recommendations were developed for taking into account real equipment parameters. It was established that deviation of transformer parameters from nominal values can lead to errors in short-circuit current calculations of up to 15-20%, which critically affects the choice of switching equipment and relay protection settings [1].