侯寨变电站补偿电容器的串联电抗器的仿真选择

Simulative Choice of Serial Reactor for Compensating Capacitor in Houzhai Substation

为了解决侯寨变电站投入两组 10 k V补偿电容器时母线过电压保护动作的问题 ,用 RTDS仿真机对补偿电容器的串联电抗器的参数进行仿真试验。仿真试验结果表明 :仿真结果和实测结果相接近 ;选用 0 .5%或 1%串联电抗器 ,投入两组以上的电容器可解决电容器跳闸和 5次谐波放大的问题。通过仿真试验可正确选择变电站补偿电容器的串联电抗值。

In order to solve the problems about the action of bus over voltage protection when two groups of 10 kV compensating capacitors are switched on in the Houzhai Substation,RTDS Simulation Machine was used to test the parameters of serial reactor in compensating capacitor.The simulation test shows that the simulation result is close to local testing result.The problems about trip of capacitor and 5 order harmonic amplificationg can be solved by choosing 0.5% or 0.1% serial reactor and using more than two groups of the capacitors.The serial reactive value of the compensating capacitor in substation can be chosen correctly by simulation test.