9、电源故障

电源方面的问题也较多，如备用电源不能自投，保险配置不合理及电源内部故障等造成电源中断，温压电源波动引起保护误动及接插头接触不良导致温压电源无输出；有的系统整个机柜通过一路保险供所有输入信号或一路电源外接负载很大，还的控制电源既未接又未有冗余备用。

10、SOE工作不正常

SOE的结论对事故的分析判断起了很重要的作用，但在现实中，许多电厂发生保护动作等情况时SOE未记录下拉或记录时间与实际情况不符。如电厂#1机组出现过SOE事件顺序追忆时间与实际跳闸时间不相对应，SOE时间打印浏览后不能返回，首次跳闸原因在时间顺序未能第一个反应，SOE时间顺序数据不能设置等问题。而又的电厂在几次事故分析时发现SOE结论中的时序与历史曲线中的时序有偏差，有时甚至时序颠倒，具体表现于同一个点在历史曲线和SOE中民生时间不一致，且有时偏差很大，这会延误事故分析的进程，有时甚至误导事故分析方向。SOE问题既与系统设计不合理，SOE点没完全集中在一个上有关，也与系统硬件及软件考虑不周有关。

 
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