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大小:778.82 KB
页数:15页
时间:2019-05-27
《Proper selection of passive and active power quality filters for the mitigation of mains ha》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、http://www.elecfans.comSchaffnerEMVAG电子发烧友Nordstrasse114542LuterbachSwitzerlandhttp://bbs.elecfans.com电子技术论坛T+41326816626F+41326816630www.schaffner.comenergyefficiencyandreliabilityWhitepaperProperselectionofpassiveandactivepowerqualityfiltersforthemitigationofmainsharmonicsAbstractThe
2、steadyincreaseinnon-linearloadsonthepowersupplynetworksuchas,forinstance,variablespeedmotordrives(VSDs),raisesquestionsaboutpowerqualityandreliability.Inthisrespect,agreatdealofattentionhasbeenfocusedonharmonicsastheyoverloadthenetworkinfrastructure,causereliabilityproblemsonequipmenta
3、ndsystemlevel,andwasteenergy.Passiveandactiveharmonicfiltersareusedtokeeptheseharmonicproblemsincheck.Theuseofbothactiveandpassivetechnologyisjustified.Thedifficultyisinhowtoselectanddeployharmonicfilterscorrectly,whichiskeytoachievingasatisfactoryperformance.Thispaperexplainswhichspec
4、ificationsaresuitablewhenitcomestochoosingactiveandpassiveharmonicfiltersandwhichmistakesneedtobeavoided.AndrzejPietkiewicz,Ph.D.,ProjectManagerInnovationCenterStefanMelly,BusinessDevelopmentManagerDecember20081/15http://www.elecfans.com电子发烧友http://bbs.elecfans.com电子技术论坛SchaffnerEMVAGW
5、hitepaperRatingofharmonicfiltersDecember,20082/15PowerqualityandharmonicsTheloadexertedbyharmonicsonthepowernetworkinfrastructurehasincreaseddramaticallyoverthepastfewyears.Harmoniccurrentsarecausedbynon-linearloads.Anon-linearloadisaconsumerofelectricitythatdrawsanon-sinusoidalcurrent
6、fromthesupplynetworkwhensuppliedwithasinusoidalvoltage.Theseharmoniccurrentsflowinadditiontothe“active”sinewave,generateadditionallossesinelectricalinstallations,andcanresultinthermaloverload.Harmoniccurrentsflowthroughthesystemimpedance,resultinginnon-sinusoidalvoltagedropsthatcancomp
7、romisenetworkvoltagequality.Sensitiveloads,suchasmedicaldevicesorITinfrastructure,canhavetheiroperationaffectedifthevoltagesupplyisdistorted.Measuresforreducingharmonicsareimplementednowadaysinordertoresolvethisissueandcomplywithnationalandinternationalstandardsateverylevelofthenetwo
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