Active Power Filter.pdf

1、中南大學(xué)碩士學(xué)位論文ActivePowerFilter姓名：RafiYoussef（約瑟夫）申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：計(jì)算機(jī)應(yīng)用技術(shù)指導(dǎo)教師：羅安20040101Didacticxwtemofcompensationofharmonicsandreactivepower(byRaftYousse—D—MasteI—pegree—jhesisLikeanygeneratorofelectdcpower，anetworkofpowerprov

2、idesenergytotheapparatusesusersbytheintermediaryofthetensionswhichitmaintainsontheirterminalsItappearsobviousthatthequalityofthisenergydependsonthatofthelensionatthepointofdeliveryThistensiongenerallyundergoesmanydisturb

3、ancesoftwodistinctodgins：—Disturbancesoftensioncausedbythepassageintheelectdcalsupplynetworks。oftheinterferencecurrentsliketheharmonicunbalantedandreactivecurrents一DisturbancesoftensioncausedbydisturbingtensionsIiketheha

4、rmonicandunbalancedtensionsandthehollowsoftensionInanelectdcalnetworkunbalancedandharmoniccurrentsgeneratedbynonlinearandunbalancedIoadscancauseharmonicsandunbalancedvoltageThesevoltageperturbationsalongwithvoItagesagcan

5、stronglydegradecustomerpowerqualityNowadays，theactivefilterssuchasshunt，seriesandcombinedshuntsedesarestudiedasafiexiblesolutiontocompensatealIcurrentandvoltageperturbationsThispaperpresentsdesigningtheactivepowerfilterT

6、hisparalleltypeactivepowerfilterisusedtoimprovepowerfactorofnon1inearIoadtobeneedy1ThepdncipleisthattheactivepowerfilterwouldsupportreactivepowerandharmonicspowerthatIcadconsumes。thenthepowersupplywoulddeliveronlyaverage

7、powerThefilterconsistsofacapacitoraninductorandfourpowerswitches。ThecapacitorisasourcewhereenergyisstoredinforbalancingpowerTheinductorisusedtodecreaserateofcurrentchangeAndthepowerswitchesareusedtocontroIthedirectionofp

8、owerflowThepowerswitchesjsabletocontroIthedirectionofpowerflowasIongasthecapacitorvoltageiskepthigherthanthesystemvoltageAndbesidesswitchingcouldcontroIthesystemcurrenttobesinewavethatisinphasetosystemvoltageThecommandth

9、atiSusedtodefinetheamplitudeofthereferencecurrent，iSgeneratedbycomparingthecapacitorvoltagewiththereferencevoltage。thisiSdonetokeepthecapacitorvoltageconstantWithintheframeworkofreportofthesisfortheobtainmentofMasterdegr

10、eeithascardedoutadidacticsystemofcompensationofharmonicsandteactivepowerTheprototypewaselaboratedjnautomaticdeptcontroIengineeringIaboratodes(incentralsouthuniversity)WththetechnicaIassistancefrommembersofthelaboratoryan