可控串补区内故障间隙自触发问题分析及处理建议

Analysis and treatment of gap self-triggering on TCSC at in-area fault

针对冯屯500 k V可控串补站在区内瞬时性单相接地故障过程中的火花间隙系自触发问题,笔者根据火花间隙的结构和原理,结合伊冯甲线可控串补保护动作和录波数据,分析了火花间隙的自触发原因,结果表明,火花间隙的自触发与火花间隙元件本身和环境因素有关,伊冯甲线可控串补火花间隙自触发属于误触发。同时,为保证伊冯甲线可控串补系统安全运行,提出对投运火花间隙进行定期维检建议。

Aiming at the spark gap self - triggering occurring during the in - area transient single - phase grounding in Fengtun 500 kV TCSC station, the author analyzes the cause for spark gap self - triggering, on the basis of the structure and principle of spark gap, combined with the TCSC protection action and the recorded data of Yifeng Line A. The result shows that selftriggering relates to spark gap component and its environment, besides TCSC spark gap self - triggering of Yifeng Line A is a fault. In order to guarantee the safe operation of the TCSC system of Yifeng Line A, the paper advises to maintain and overhaul spark gap periodically.