基于重复pi控制的逆变器并联技术分析

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1、基于重复PI控制的逆变器并联技术研究AbstractInthisever-changingcontemporarytechnologicalera,energydevelopmentandapplicationhascaughtmoreandmorecommunity'sconcernandattention.Howtoimprovethecapacityandreliabilityofpowersupplyhasbecomethemajorfocusofpowersourceresearch,andd

2、istributedgenerationisalsofavored.Undoubtedly,inverterparalleltechnologycanimprovepowercapacitywhiletakingadvantageoftheparallelredundancytoensurethereliabilityofelectricity.theparallelmethodofnointerconnectionlinescanmeettherequirementofdistributedgener

3、ation.sothispaperselectswirelessparallelmethodasthefocusofthisstudy,thiswillbethefutureofparallelpowertechnologydevelopmenttrend.Fortheproblemsexistedinnon-interconnectlineinverterparallelsystem,thispaperhasimprovedthecontrolstrategyofparallelinverterinn

4、on-interconnectlinesystem.repetitivecontrolmethodandtraditionalPIdoubledual-loopcombiningmethodhasbeenbroughtin.thesecondchapterintroducesthecompositecontrolmodel,describingindetailthedesignparametersoftherepetitivecontrollerandPIcontroller.Thiscontrolme

5、thodnotonlyimprovestheaccuracyofsystem'ssteadystatecontrolanddynamicresponsespeed,butalsoimprovesthenonlinearloadingabilityandparallelcirculationcharacteristicsbyrepetitivecontrol.ThepaperalsodescribesthebasicprinciplesofPQdroopcharacteristicsandprincipl

6、esofcirculationgeneration;itgivesthemethodsofdeterminingthedroopfactorandanalyzestheadvantageofthecontrolmethodinthisnon-connectivelineparallelsystem.ThispaperhasbuiltasimulationmodelofparallelsysteminMATLAB/SIMULINK,includingpowercalculationmodulewhichi

7、sthemostcomplexandcriticalpart,anditispackagedintoasubsystemforlatercalls.ThesimulationprovesthesuperiorityofduplicatePIcompositecontrolmethodsinnon-connectivelineparallelsystem.someparameter'sprobablerangeorspecificvaluesareselectedthroughthedebug,theva

8、lidityandsuperiorityofthedesignisfinallyproved.Finally,thispapergivesthedesignproposalforthecorehardwaresystembasedonDSP2812,includingcontrolmodule,protectionmodule,isolationmoduleandpowersupplymodule.KeyWords：PI;repetitiv