串联补偿电容器短路冲击试验仿真分析

Simulation and Analysis of Short-Circuit Impact Test of Series Capacitors

目前串联补偿设备中串联电容器运行不够稳定,故障频发。根据并联电容器试验标准,以往进行的试验项目主要包括局部放电试验、介损试验及交流耐压试验,但是这些试验不能全面地反映电容器的质量情况。为考核串联补偿电容器的过负荷承受能力,需模拟线路短路故障时电容器上的短时过电压工况。为此,在分析多种方案的基础上,确定采用并联谐振储能试验回路的试验方案。通过仿真确定试验回路中各种参数对试验结果的影响,并提出最优的参数配置方案,为下一步进行具体实际的串联补偿电容器短路冲击试验提供指导意见。

Currently,series capacitors as a series compensation device cannot run steadily enough,which leads faults happen frequently.According to the parallel capacitor test standard,many tests conducted in the past,such as the partial discharge test,the dielectric loss test and AC withstand voltage test,cannot fully reflect the quality of the capacitors.In order to inspect the overload capacity of the series capacitors,it is necessary to simulate the short-time over voltage conditions of series compensation capacitors when short circuit fault happens.After analysis of various solutions,the test scheme of parallel resonant energy storage test loop is selected.The influence of various parameters in the test loop on the test results is determined by simulation and the optimal parameter configuration is proposed,which can provide a guidance for the specific tests in the next step.