直流系统环网是接地故障检测中的一个关键因素。
Loop net of DC system is an important factor in the grounding fault detection.
在发电厂和变电所内，直流系统接地故障的检测，过去一直采用手动方式来完成。
In electric power plants and substations, a detection of DC system ground fault was usually completed in hand manner, which is very much trouble and danger.
文中提出直流系统接地故障检测方法。
In this paper, a new method for DC system grounding fault detecting is presented.
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