【英文标准名称】:Electromagneticcompatibility(EMC)-Part3-13:Limits-AssessmentofemissionlimitsfortheconnectionofunballancedinstallationstoMV,HVandEHVpowersystems
【原文标准名称】:电磁兼容性(EMC).第3-13部分:限值.不平衡装置对MV、HV和EHV动力系统的连接用排放限值的评估
【标准号】:IEC/TR61000-3-13-2008
【标准状态】:现行
【国别】:国际
【发布日期】:2008-02
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC77A
【标准类型】:()
【标准水平】:()
【中文主题词】:评估;不对称的;定义;电气工程;电磁兼容性;EMC;闪光;低压电源;供电系统;非对称;电压波动
【英文主题词】:Assessment;Asymmetrical;Definitions;Electricalengineering;Electromagneticcompatibility;EMC;Flicker;Lowvoltagemains;Powersupplysystem;Unsymmetry;Voltagefluctuations
【摘要】:ThispartofIEC61000providesguidanceonprincipleswhichcanbeusedasthebasisfordeterminingtherequirementsfortheconnectionofunbalancedinstallations(i.e.three-phaseinstallationscausingvoltageunbalance)toMV,HVandEHVpublicpowersystems(LVinstallationsarecoveredinotherIECdocuments).Forthepurposesofthisreport,anunbalancedinstallationmeansathree-phaseinstallation(whichmaybealoadoragenerator)thatproducesvoltageunbalanceonthesystem.Theconnectionofsingle-phaseinstallationsisnotspecificallyaddressed,astheconnectionofsuchinstallationsisunderthecontrolofthesystemoperatororowner.Thegeneralprincipleshowevermaybeadaptedwhenconsideringtheconnectionofsingle-phaseinstallations.Theprimaryobjectiveistoprovideguidancetosystemoperatorsorownersonengineeringpractices,whichwillfacilitatetheprovisionofadequateservicequalityforallconnectedcustomers.Inaddressinginstallations,thisdocumentisnotintendedtoreplaceequipmentstandardsforemissionlimits.Thereportaddressestheallocationofthecapacityofthesystemtoabsorbdisturbances.Itdoesnotaddresshowtomitigatedisturbances,nordoesitaddresshowthecapacityofthesystemcanbeincreased.Sincetheguidelinesoutlinedinthisreportarenecessarilybasedoncertainsimplifyingassumptions,thereisnoguaranteethatthisapproachwillalwaysprovidetheoptimumsolutionforallunbalancedloadsituations.Therecommendedapproachshouldbeusedwithflexibilityandjudgmentasfarasengineeringisconcerned,whenapplyingthegivenassessmentproceduresinfullorinpart.Thesystemoperatororownerisresponsibleforspecifyingrequirementsfortheconnectionofinstallationswhichmaycauseunbalanceonthesystem.Thedisturbinginstallationistobeunderstoodasthecompletecustomer’sinstallation(i.e.includingbalancedandunbalancedparts).Problemsrelatedtounbalancefallintotwobasiccategories.?Unbalancedinstallationsthatdrawnegative-sequencecurrentswhichproducenegativesequencevoltagesonthesupplysystem.Examplesofsuchinstallationsincludearcfurnacesandtractionloads(typicallyconnectedtothepublicnetworkatHV),andthreephaseinstallationswheretheindividualloadsarenotbalanced(typicallyconnectedatMVandLV).Negative-sequencevoltagesuperimposedontotheterminalvoltageofrotatingmachinescanproduceadditionalheatlosses.Negative-sequencevoltagecanalsocausenon-characteristicharmonics(typicallypositive-sequence3rdharmonic)tobeproducedbypowerconverters.?Unbalancedinstallationsconnectedline-to-neutralcanalsodrawzero-sequencecurrentswhichcanbetransferredornotintothesupplysystemdependingonthetypeofconnectionofthecouplingtransformer.Theflowofzero-sequencecurrentsinagroundedneutralsystemcauseszero-sequenceunbalanceaffectingline-to-neutralvoltages.Thisisnotnormallycontrolledbysettingemissionlimits,butratherbysystemdesignandmaintenance.Ungrounded-neutralsystemsandphase-to-phaseconnectedinstallationsarenot,however,affectedbythiskindofvoltageunbalance.
【中国标准分类号】:L06
【国际标准分类号】:33_100_01
【页数】:44P.;A4
【正文语种】:英语

标准名称：	家具表面硬质覆面材料剥离强度的测定
中标分类：	轻工、文化与生活用品 >> 家具 >> 家具综合
替代情况：	转化为QB/T 3656-99
发布日期：
实施日期：	1991-01-01
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