张电4号机汽动泵调门异常摆动原因剖析

Real Cause of Adjustable Port Anomaly Swing at Turbine Driven Pump of No.4 Unit in Zhangjiakou Power Plant

分析2005年5月张家口发电厂4号机组1号汽动泵调节汽门的摆动现象。通过对INF I90控制系统最低层数据传输总线的剖析,找出了事故的真正原因。

This paper analizes the swing phenomenon of the adjusting port of No. 1 steam pump of No. 4 Unit in Zhangjiakou Power Plant in May, 2005. Based on the dissection of lowest layer data bus of INFI90 system, the internal cause of the fault is found out.