220V工频交流窜入直流控制回路造成机组跳闸分析

摘要

介绍了一起由于电弧引起的工频交流窜人直流控制回路造成机组跳闸的故障情况。通过试验检查、分析找出了问题的原因，并采取相应的处理及防范措施。%Abnormal condition of a 220V AC intrude DC current fault caused by electric-arc is introduced in this paper. This caused generating units tripping. The reason is concluded and the corresponding measures are proposed with the experiment, inspection, analysis.