自动跟踪补偿消弧系统综述

Survey on automatic tracking compensation arc suppression system

针对电网发生单相接地故障时,系统无法快速、准确地对单相接地电容电流进行有效补偿的问题,对中性点电压和补偿原理进行了研究,通过采用中性点经消弧线圈的接地方式,建立了自动跟踪补偿消弧系统,同时提出了自动调谐原理。该系统主要由消弧线圈和控制系统组成,在发生单相接地故障时,自动进入补偿状态,接地故障消除后,自动退出补偿状态。调谐原理是系统进行自动跟踪补偿的关键技术,在很大程度上影响系统的跟踪补偿速度与精度。通过对国内外几种常用的调谐原理进行总结和对比,指出了各自存在的优缺点及适用范围。研究结果表明,不同结构特点的消弧线圈所适用的调谐原理也不同,选择合适的调谐原理才能快速、有效地补偿接地电容、电流。

Aiming at the system cannot quickly and accurately compensate for single-phase grounding capacitor current effectively when the power grid grounding fault occurs,the neutral point voltage and compensation principles were studied.Through the use of neutral point via arc-suppression coil grounding mode,the automatic tracking compensation arc-suppression system was established and automatic tuning principle was proposed.The system was mainly composed of arc suppression coil and control system,when single-phase grounding fault occurs,it automatically into the compensation condition,the grounding fault is eliminated,it automatically exit the compensation state.Tuning principle is a key technology of automatic tracking compensation system and the compensation speed and accuracy of system were largely affected by it.After several kinds of tuning principle commonly used at home and abroad were summarized and compared,their advantages and disadvantages and application scope were pointed out.The results indicate that tuning principle applies to the suppression coil with different structures are also different,choosing the appropriate tuning principle can rapidly and effectively compensate the grounding capacitor current.