交流电流回路两点接地危害的分析及应对措施

Analysis and solution of harm of two points grounding in AC loop

继电保护电流回路两点接地问题是造成继电保护不正确动作的隐患,本文通过对一起继电保护装置误动作行为,采取现场检查、录波波形分析等方法,证实了电流回路两点接地问题是造成本次保护装置不正确动作的直接原因,对交流电流回路两点接地的危害进行了分析,并结合电网反事故措施提出了相应的措施和对策。

The problem of two points grounding in AC loop is a hidden trouble for relay protection false-action .The paper analyses an accident of relay protection false-action based on scene checking and recorded diagram analyzing. It substantiates this problem is the efficient causation of relay protection false-action and analyses the harm of two points grounding in AC loop. Finally, the paper brings forward relevant solutions based on the grid anti-accident prediction.