变电站改造中短路电流的分析

Analysis of Short-Circuit current in Substation Reformation

通过理论推导得出快速的近似计算短路电流方法,并与PSASP软件计算结果进行了比较,该方法在精度上虽不及传统算法,然而计算公式简单、快捷,适合应用于电网规划;并且使用该近似计算公式分析了变电站改造工程对各站点短路电流的影响,以期对电网规划起到指导作用。

A quick method of calculating short-circuit current is deduced by theory in this paper.The result of it is compaired with that of PSASP method,and it is showed the accuracy of the quick method is not as good as PSASP method.However,it is suitable for power network planning with the easy fomula,saving time.The impact of substation reformation to every node short-circuit current is analysed,so as to be intended to give a guide effect to power network planning.