第30卷第12期2023年12月仪器仪表用户INSTRUMENTATIONVol.302023No.12DEH系统电源故障分析处理与预控王世云1,何永君2,包伟飞1(1.浙江浙能乐清发电有限责任公司,浙江温州325609;2.中国电机工程学会,北京100761)摘要:DEH系统负责汽轮发电机组转速和负荷控制,其系统电源的可靠性是火电机组安全、稳定运行的关键因素之一。本文首先分析了主汽门位置变送器供电电源设计不合理导致再热器保护误动,DEH系统电源分配模块老化故障导致机组跳闸,DEH系统电源故障造成AST电磁阀失电导致机组跳闸等故障案例,提出了故障处理和防范措施。随后总结出DEH系统电源故障的防范措施,包括搜集同类型机组故障信息,开展设备使用周期管理等,并给出审查回路电源设计合理性,定期更换电源模块,检修时应进行回路电源测量与记录,优化电源报警和电源的日常巡检等建议。关键词:DEH;电源故障;预控中图分类号:TM311文献标志码:APowerSupplyFaultAnalysisandPre-ControlofDEHControlSystemWangShiyun1,HeYongjun2,BaoWeifei1(1.ZhejiangEnergyYueqingPowerGenerationCo.,Ltd.,Zhejiang,Wenzhou,325609,China;2.ChineseSocietyforElectricalEngineering,Beijing,100761,China)Abstract:DEHsystemisresponsibleforspeedandloadcontrolofturbo-generatorset.Thereliabilityofpowersupplyisoneofthekeyfactorsforthesafeandstableoperationofthermalpowerset.Thispaperfirstanalyzesthefaultcasesofreheaterprotectionmisoperationcausedbytheunreasonabledesignofpowersupplyofmainvalvepositiontransmitter,DEHsystempowerdistributionmoduleagingfaultcausedbyunittrip,DEHsystempowerfailurecausedbyASTsolenoidvalvepowerlosscausedbyunittrip,andputsforwardthefaulttreatmentandpreventionmeasures.ThispaperthensummarizestheDEHsystempowerfailurepreventionmeasures,includingfaultinformationcollectedthesametypeunit,equipmentlifecyclemanagement,etc.,andrationality,replacedperiodicallyreviewpowercircuitdesignisgivenpowersupplymodule,maintenanceshouldbedonewhenthecircuitpowermeas-uringandrecording,optimizepowersupplyalarmandpowerofdailyinspection.Keywords:DEH;powersupplyfault;pre-control收稿日期:2023-10-04作者简介:王世云(1978-),男,浙江温岭人,本科,工程师,仪控专工,长期从事火电厂热工自动化设备管理。DO...