Исследование и расчет доли стекающего с заземлителя подстанции тока при однофазном коротком замыкании в электрической сети

Abstract

On the basis of calculations and studies analyzed the current distribution of single-phase short-circuit between the substation earthing system and earthing "rope-reliance". Studies carried out for the actual range of variation of the circuit parameters, showed that the earthing resistance substation substantially affects the current distribution in the one-phase short circuit fault. For example, using the graph shows that with increasing resistance grounding system of "rope-supported" the proportion of single-phase short-circuit current flowing from the substation earthing increases, while the proportion of single-phase short-circuit current flowing from the grounding device supports decreases and vice versa. In addition, when rationing grounding systems at substations for the touch voltage is necessary to analyze all the possible modes of operation of the network, which is substationed.