冲击电容器直流叠加操作冲击回路仿真分析

Analysis on Loop Simulation of DC Voltage Superimposed with Switching Impulse Voltage for Surge Capacitors

摘要:

直流输电线路中性线上运行的冲击电容器，同时承受直流电压及站内外故障操作冲击电压的影响。基于 pscad 电磁暂态仿真软件对冲击电容器直流叠加操作冲击电压老化试验回路进行了仿真，分析了该试验回路中直流电 压对冲击电压发生器输出波形的影响，以及连接操作冲击电压侧与直流电压侧的耦合电容对试品电压波形的影响。 分析认为，直流电压对冲击电压发生器输出波形影响极小，耦合电容取值对试品电压波形影响也极小。仿真结果表 明，冲击电容器直流与冲击叠加老化试验具有可行性。

Abstract:

The surge capacitor running on the neutral line of DC transmission line is affected by DC voltage and switching impulse voltage of the faults inside and outside the station． Based on pscad electromagnetic transient simulation software，the aging test loop of DC voltage superimposed with switching impulse voltage in surge capacitor is simulated． The influence of DC voltage on the output voltage waveform of impulse voltage generator is analyzed as well as the influence of coupling capacitor connected switching impulse voltage side with DC voltage side on the sample voltage waveform． According to the analysis，DC voltage has little influence on the output voltage waveform of impulse voltage generator，and the value of coupling capacitor also has little influence on the sample voltage waveform． The simulation results show that the aging test of DC voltage superimposed with switching impulse voltage is feasible．