Актуалізація розрахунку струмів короткого замикання в мережах зі змінною конфігурацією та розосередженою генерацією

Abstract

The necessity of updating short-circuit current calculations in electrical networks whose configuration changes rapidly due to post-emergency restoration, temporary supply schemes, replacement of damaged equipment with transformers having different nameplate parameters, and the connection of distributed generation sources is substantiated. It is shown that the emergence of numerous small generating units, renewable energy sources, and battery energy storage systems complicates the determination of both maximum and minimum short-circuit currents. It is proposed to consider short-circuit current calculation as a basis for reducing the probability of thermal and electrodynamic equipment damage, as well as for ensuring correct operation of relay protection and automation when controlling switching devices.