三峡左岸电站机组直流系统接地故障查找分析

机组直流系统担负着机组控制、保护、调速、励磁等重要设备的控制回路供电任务,其运行好坏对机组的安全稳定运行至关重要。文中介绍了三峡左岸电站机组直流系统绝缘监测装置的原理,分析了机组直流系统出现接地故障时的现象和特点,提出了接地故障的查找方法。

Checking and Analysis of Grounding Faults of Units DC System of Three Gorges Left Bank Hydropower Station

The DC system of units supplies power to the control circuits of important devices such as control,protection,governor,excitation and so on;thus,it is very important to the safety and stability of units.The principles of insulation monitoring devices of units' DC system of the Three Gorges Left Bank Hydropower Station are introduced.The phenomena and characteristics of grounding faults of the DC system are analyzed,and the method of checking grounding faults is put forward.