磁控电抗器对特高压输电线路工频过电压的抑制作用

Restraint of Power Frequency Over-voltage by Magnetic Controllable Reactor in UHV Transmission System

基于对磁控电抗器抑制长距离输电线路工频过电压的理论分析,仿真分析了不同装设方式下磁控电抗器抑制工频电压的效果。仿真结果表明:并联磁控电抗器及其装设方式对线路工频电压升高有一定的抑制作用;在长线空载电容效应、不对称接地和突然甩负荷这3种工况下,磁控电抗器对工频过电压都有显著的抑制作用,但装设在线路末端时抑制工频过电压的效果比装设在首段或装设在两端的效果好。

Based on the theoretical analyses that power frequency overvoltage generated by long-distance transmission line can be restrained by magnetic controllable reactor（MCR） effectively,the restraint of power frequency overvoltage by MCR is simulated in three different working conditions,that is, no-load line capacitance effect,asymmetric earthing and sudden load shedding.It is shown that parallel MCR is effective to restraining the overvoltage,of which the installation in the tail end of line is better than in the head end and in two ends.