简介:Powerreliabilitypromotedin1sthalfof1997Fromthestatisticsof27municipalitiesandprovincialcapitalscollectedbythePowerReliability...
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简介:Co-hostedbyChinaSocietyforHydropowerEngineeringandChinaThreeGorgesProjectCorporation,co-organizedbyChinaHydropowerEngineeringConsultingGroupCorporation,SINOHYDROCorporation,ChinaGezhouba(Group)CorporationandChinaInstituteofWaterResourcesandHydropowerResearch,organizedbyChinaElectricPowerInformationCenterBeijingZhongdianqiuzhenT&DCo.,Ltd.,supportedbyStateElectricityRegulatoryCommissionofChina,StateGridCorporationofChina,ChinaSouthernPowerGridCo.,Ltd.,ChinaHuaneng
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简介:本文对一种新的感应电动机即静电屏蔽电动机(ESIM)作了评估。ESIM可将转子轴电压降低到低于轴承润滑剂的电场强度击穿的电平,并且为脉冲宽度调制(PWM)逆变器导致的沟蚀所造成的轴承加速磨损提供了一个解决办法。本文是从评述轴电压及其在PWM电压源逆变器上运行时所产生的轴承电流开始的。本文展示了轴承电沟蚀的一个例子,叙述和讨论了系统模型。还提出了几种ESI的结构详情和试验结果。实验结果表明,ESIM在不降低电动机电磁性能的情况下,解决了静电产生的转子轴电压和轴承问题。
简介:TheDevelopmentof3DCADtechnologypresentsaneweffectivetoolindesigningoutdoorswitchyardforpowerplant.Anewlayoutpatternof330kVswitchyard(SWYD)ofalignedtypewasstudiedwiththismethod.Someissuesaboutcomputerized3DmodesappliedinSWYDdesignarealsodiscussedinthispaper.
简介:Basedonthecalculationandanalysisofenergy-savingbenefitundervariousoperatingconditions,andtheinvestmentpaybackperiodforthelowpressureeconomizerofthe3rdstageprojectofLongkouPowerPlant,theoptimumoperatingconditionsofthesystemanditsreasonableheatingsurfacearedefined,andthefeasibilityofthedesignalternativeofthelowpressureeconomizersystemisverified.