河池串补装置火花间隙系统自触发原因分析

针对河池串补MOV在人工单相接地试验中火花间隙系自触发启动现象，基于河池串补火花间隙的工作原理，对串补装置火花间隙自触发进行分析和检测验证：人工单相接地试验与仿真计算表明串补电压VD测量装置可能存在较大误差，火花间隙自触发电压明显低于整定值，进一步对火花间隙进行检测，结果显示均压电容参数的变化使得火花间隙的自触发电压降低，从而导致了火花间隙的自触发。建议定期检测已投运串补装置的火花间隙参数，确保火花间隙正确动作。

Analysis on the Cause of Spark Gap System Self-Triggering of Hechi Series Compensation Device

Aiming at the phenomenen of Spark Gap System Self-Triggering during the artificial single-phase grounding test on the MOV of Hechi fixed series compensation FSC device, this paper analyzes the cause of the phenomenen based on the functional principles of the spark gap system. The artificial single-phase grounding test and simulation calculation show that abnormal errors existed in FSC voltage metering device as the self triggering voltage of the spark gap was obviously lower than the setting value. The detection on the spark gap turns out that the parameter variation of grading capacitor caused the voltage reduction of the spark gap self-triggering, resulting in the spark gap self-triggering. It's suggested that the parameters of the spark gap should be periodically detected to make the device work properly.