9、電源故障

電源方面的問(wèn)題也較多，如備用電源不能自投，保險(xiǎn)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(dòng)引起保護(hù)誤動(dòng)及接插頭接觸不良導(dǎo)致溫壓電源無(wú)輸出；有的系統(tǒng)整個(gè)機(jī)柜通過(guò)一路保險(xiǎn)供所有輸入信號(hào)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(duì)事故的分析判斷起了很重要的作用，但在現(xiàn)實(shí)中，許多電廠(chǎng)發(fā)生保護(hù)動(dòng)作等情況時(shí)SOE未記錄下拉或記錄時(shí)間與實(shí)際情況不符。如電廠(chǎng)#1機(jī)組出現(xiàn)過(guò)SOE事件順序追憶時(shí)間與實(shí)際跳閘時(shí)間不相對(duì)應(yīng)，SOE時(shí)間打印瀏覽后不能返回，首次跳閘原因在時(shí)間順序未能第一個(gè)反應(yīng)，SOE時(shí)間順序數(shù)據(jù)不能設(shè)置等問(wèn)題。而又的電廠(chǎng)在幾次事故分析時(shí)發(fā)現(xiàn)SOE結(jié)論中的時(shí)序與歷史曲線(xiàn)中的時(shí)序有偏差，有時(shí)甚至?xí)r序顛倒，具體表現(xiàn)于同一個(gè)點(diǎn)在歷史曲線(xiàn)和SOE中民生時(shí)間不一致，且有時(shí)偏差很大，這會(huì)延誤事故分析的進(jìn)程，有時(shí)甚至誤導(dǎo)事故分析方向。SOE問(wèn)題既與系統(tǒng)設(shè)計(jì)不合理，SOE點(diǎn)沒(méi)完全集中在一個(gè)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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