故障选线中残流增量法与扰动法的对比

Comparison of Remnant Current Increment Method with Disturbance Method in Fault-Line Selection

针对当前国内中低压配电网普遍采用的中性点经消弧线圈接地方式存在的故障选线不准的问题,在目前主要的选线方法中,选取最具代表意义的残流增量法和扰动法,分别分析了其选线原理,对实际运行效果做了比较,得出结论:无论是理论上还是实际运行效果,残流增量法明显优于其他的选线方式,可有效的解决目前谐振接地选线的问题。

The neutral point of low and middle voltage distribution networks is grounded mainly by arc suppression coil. In such network, the fault-line selection by neutral point grounding through is not very accurate. The principles of line selecting of remnant current increment method and disturbance method are analyzed. After comparing the practical effect of both methods, it is concluded that the remnant current increment method is superior than the other, and the method could effectively solve the problem of fault-line selection in resonant grounding system.