一种基于等离子体的串联补偿电容器间隙技术

Research on Series Compensator Capacitor Gap Technology Based on Plasma

针对串联补偿电容器(以下简称"串补")间隙在运行过程中频繁出现误触发的现象,提出一种等离子体串补间隙技术。根据间隙击穿电压分散性大的特点,利用等离子技术大幅度提高间隙距离,避免间隙误触发。为了避免电容分压元件参数变化引起分压系数变化导致间隙误触发的现象,取消了电容分压系统。由于从长电缆耦合进来的干扰会导致间隙控制设备损坏、间隙误触发等问题,利用超级电容、激光供能等措施避免长电缆的使用,降低干扰的影响。通过研究新型的间隙结构,利用重力避免了污秽的产生,从而避免污秽对间隙放电电压的影响。所研制的串补间隙经过三次区内故障、两次区外故障考验均能正确动作。

In allusion to the phenomenon of frequent false triggering of the gap of series compensation capacitor in operation, this paper proposes a kind of plasma technology. According to the characteristic of large dispersity of gap breakdown voltage, this plasma technology can greatly improve gap distance and avoid false triggering. In order to avoid false triggering of the gap caused by changes of divider coefficients due to changes of parameters of capacitor divider elements, it cancels the capacitor divider system. Aiming at problems of damages of gap control equipment and false triggering caused by interference of long cable coupling, it adopts measures of super capacitors and power supplies of laser to avoid utilization of long cables and reduce influence of interference. By studying new gas structures, it makes use of gravity to avoid generation of pollution so as to avoid influence of pollution on discharge voltage of the gap. It has proved accurate action of the series compensation capacitor gap based on three times of internal faults and twice external faults.