基于PSCAD的自耦变空载投运谐振过电压仿真分析

PSCAD-based Simulative Analysis of Resonant Overvoltage upon No-load Switching of Autotransformer

对大型自耦变空载投切过程中产生的谐振过电压问题进行仿真,结果表明变电站避雷器、并联电抗器等装置对谐振过电压具有良好的阻尼作用,谐振过电压不会超出变电站限压能力。

A simulative analysis on resonant overvoltage caused by no-load switching of large autotransformer was carried out in the present work.The results showed that substation′s lightning arrester,shunt reactor and other devices have good damping effect on resonant overvoltage,and the resonant overvoltage will not exceed the voltage limiting capacity of substation.