This paper analyzes why dc system ground fault causes power unit outage and proposes improvement plans. The prevention measures are put into effect.
文章分析了直流接地引起主机停运的原因，并提出了改进方案，实施了防范措施。
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.
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。
What's more, the paper researches Expert system of fault diagnosis to ground in DC power in detail, especially focusing on the foundation of repository and the design of inference machine.
对直流电源系统接地故障诊断专家系统作了较深入研究，着重研究了知识库的建立和推理机的设计。
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