某水电厂交流窜入直流系统事件分析

Analysis of the Incident of an AC Channel Entering a DC System in a Hydropower Plant

本文从事件情况、异常排查、原理分析几个方面,分析了交流窜入直流系统,同时继电器一端存在长电缆分布电容导致的继电器误动事件。对直流系统异常的排查思路、交流窜入直流的电路原理进行分析,提出后续的检修维护建议,对水电厂运行维护有一定的借鉴意义。

From the aspects of event situation,abnormal troubleshooting and principle analysis,it analyzes the inflow of AC into the DC system,and at the same time,there is a relay misoperation event caused by a long cable distributed capacitance at one end of the relay.In this paper,the troubleshooting ideas for the DC system anomalies,the analysis of the circuit principle of the AC channeling into the DC,and the follow-up inspection and maintenance suggestions have certain reference significance for the operation and maintenance of the hydropower plant.