On the analysis of the existing route method and route system,the problem faced by the integration ideas of arc suppression coil and small current alignment are proposed.When single-phase grounding system,the compensation system by changing the arc off the harmonic degree of the feeder circuit,to calculate the zero sequence current variation selected fault line.The test results show that the method can accurately realize the small current grounding system of one-phase ground fault line,and do not need distinguish between transient and steady process.%对现有选线方法和选线系统作了分析探讨,提出了采用消弧线圈和小电流选线一体化的新方法,即当系统单相接地时,通过改变消弧补偿系统的脱谐度,计算各馈线回路的零序电流的变化量选出故障线路。试验结果表明,该方法可以准确地实现小电流接地系统单相接地故障的选线,并且无需区分暂态和稳态过程。
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