--------------------------校验:_____________-----------------------日期:_____________几起350MW机组磨煤机跳闸故障分析及处理几起350MW机组磨煤机跳闸故障分析及处理杨浩1(,长春130103)摘要:针对某电厂350MW机组在运行过程中磨煤机油站故障引发磨煤机跳闸的事故,根据现场故障历史曲线和DCS数据,以及通过一系列检查及试验,发现磨煤机跳闸的原因,是由于该厂热网疏水泵变频器输入侧产生谐波干扰造成磨煤机油站控制箱双电源切换动作导致控制电源失电所造成的。对整个事故进行处理分析,对类似故障处理提出一些经验和建议。介绍磨煤机跳闸的情况,以及查找故障点的方法。对故障原因进行了分析,并提出了防范措施。关键词:热电厂、发电机、磨煤机、油站、ripfaultof350MWgeneratorstatorYangHao1(-Generationpowerplant,Changchun130103,Jilin,China)Abstract:The present work was aimed at a malfunction ofthecoalpulverizeroilstationcausedby the fault of coal mill tripping accidents during the trial operation of 350 MW power generation unit in a power ,andthroughaseriesofexaminationsandtests,foundthatMillTrippingreason,isbecausethefactoryheatinghydrophobicpumpinverterinputsideharmonicinterferencecausedbycoaloilstationcontrolbox of double power supply switch action causes the control power source failure caused to the handling and analysis of the whole accident,some experiences and advices were proposed for handling similar :ThermalPowerPlant,Generator,CoalGrrindingMachine,OilStation,FaultTreatment1磨煤机油站事故经过2012年11月05日10时08分38秒,该热电厂主控制室DCS画面显示2号机2B磨煤机油站加载电机、润滑油泵电机(A运行,B备用)同时故障,油压下降,2秒后2B磨煤机跳闸,10秒后,油站加载油泵、润滑油泵(A、B)自动启动运行;2012年11月05日10时08分38秒,该热电厂主控制室DCS画面显示2号机2A磨煤机油站加载电机、润滑油泵电机
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