180MW水轮发电机组功率测量异常原因分析及防范措施.pdfVIP

内蒙 古 电力 技 术 2013年第31卷第 1期 INNERMONGOLIAELECTRICPOWER 37 doi：10．3969／j．issn．1008-6218．2013．O1．027 180MW水轮发电机组功率测量异常原因分析 及 防范措施 张 宁 (黄河万家寨水利枢纽有限公司，山西 偏关 036412) 摘要：万家寨水电站2号水轮发电机组并网后4min内，因机组的有功功率及无功功率测 量异常，引发机组过负荷的异常告警信息。从相量关系和有功功率计算角度分析了监控系统 LCU装置与调速器装置对有功功率测量的影响，从两者的联动控制逻辑和LCU历史曲线推断 功率测量异常的原因为电流互感器的相电流引出线反接。结合国家电网公司十八项反措要 求，提 出了进行试验或检修时必须填写措施票、重要的TA测量控制设备应从 电气回路中分 离、加大值班员培训力度、加强应急预案演练、提高全员安全素质等防范措施。 关键词：功率测量；监控系统现地控制单元；调速器；电流互感器；有功功率 文献标志码：B 中图分类号：TM622；TM733 文章编号：1008—6218(2013)01—0037—06 ． CauseAnalysisof180MW TurbineGeneratorPowerMeasuringAbnormal and ItsPreventiveMeasures ZhangNing (YellowRiverWanjiazhaiWaterConservancyHubCo．，Ltd，Shanxi Pianguan 036412) Abstract：No．2 hydroelectric generating units in WanjiazhaiHydropowerStation set parallel in 4 minutes， abnormal alarm information was resulted， because the abnormal measurement of active power and reactive power．From phasor relationship and active power calculation angle，make an analysis of the monitoring system LCU device and governor gear for active power measuring abnormaleffects by linkage controllogic and LCU history CHIVe deduce powermeasuring abnormalreason forcurrenttransfomr erofthe phase current lead opposition． Combined with eighteen priorities against lending requirements．the authorputsforward thatthe testand maintenance measuresmustfillin the ticket，important TA measurement control equipment should be aeparated from the electric circuits， increasing the attendant training system， strengthening emergency plan practice，and improvingthequal