断路器动作延时时间对GAMMA-KICK功能影响的仿真分析

Simulation Analysis on Influence of Action Delay Time of Circuit Breaker on GAMMA-KICK Function

基于PSCAD/EMTDC仿真平台建立了典型的500 kV直流输电系统模型,依据快速无功功率控制(GAMMA-KICK)的原理以及与交流滤波器断路器配合的要求,对GAMMA-KICK抑制暂态电压波动的功能进行了仿真验证;并通过设置不同的动作延时时间,研究了交流滤波器断路器投切时间对快速无功功率控制的影响。仿真结果表明:快速无功功率控制能够有效降低投切时的暂态波动,延时时间直接影响快速无功功率控制效果;关断角改变越大,抑制换流母线电压暂态变化的能力越强。

Based on PSCAD/EMTDC simulation platform,a typical 500 kV DC transmission system model is established.Based on the principle of fast reactive power control(GAMMA-KICK)and the requirement of matching with AC filter circuit breaker,the function of GAMMA-KICK suppressing transient voltage fluctuation is simulated and verified.The influence of switching time of AC filter circuit breaker on fast reactive power control is studied.The simulation results show that the fast reactive power control can effectively reduce the transient fluctuation during switching,and the delay time directly affects the effect of fast reactive power control.The larger the change of turn-off angle is,the stronger the ability of restraining the transient change of converter bus voltage is.