9、電源故障

電源方面的問題也較多，如備用電源不能自投，保險配置不合理及電源內(nèi)部故障等造成電源中斷，溫壓電源波動引起保護誤動及接插頭接觸不良導(dǎo)致溫壓電源無輸出；有的系統(tǒng)整個機柜通過一路保險供所有輸入信號或一路電源外接負(fù)載很大，還的控制電源既未接又未有冗余備用。

10、SOE工作不正常

SOE的結(jié)論對事故的分析判斷起了很重要的作用，但在現(xiàn)實中，許多電廠發(fā)生保護動作等情況時SOE未記錄下拉或記錄時間與實際情況不符。如電廠#1機組出現(xiàn)過SOE事件順序追憶時間與實際跳閘時間不相對應(yīng)，SOE時間打印瀏覽后不能返回，首次跳閘原因在時間順序未能第一個反應(yīng)，SOE時間順序數(shù)據(jù)不能設(shè)置等問題。而又的電廠在幾次事故分析時發(fā)現(xiàn)SOE結(jié)論中的時序與歷史曲線中的時序有偏差，有時甚至?xí)r序顛倒，具體表現(xiàn)于同一個點在歷史曲線和SOE中民生時間不一致，且有時偏差很大，這會延誤事故分析的進程，有時甚至誤導(dǎo)事故分析方向。SOE問題既與系統(tǒng)設(shè)計不合理，SOE點沒完全集中在一個上有關(guān)，也與系統(tǒng)硬件及軟件考慮不周有關(guān)。

 
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