模块化多电平变换器研究综述-谢瑞

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1、31ज12௹ࠏ׈۽ӱVol.31No.122014୍12ᄅJournalofMechanical&ElectricalEngineeringDec.2014DOIğ10.3969/j.issn.1001-4551.2014.12.022ଆॶ߄؟׈௜эߐఖ࿹࣮ሸඍ121111྆ೋđޱਙཕđྷࡹۚđڃఫđӑᆽᇛđݓᆽਟč1.ᆄࡾസ׈৯ഡ࠹ჽđᆄࡾࡾᆄđඳ܄৯׈സࡾᆄຩݓ.2Ġ310012ᇜᇜ310007Ďᅋေğᆌؓଆॶ߄؟׈௜эߐఖčMMCĎ۲ᇕሰଆॶຉ௪ࢲܒđٳ༅ਔఃᄎྛٚൔࠣหđ๙ݖࢳ༅ٚمਔఃൻԛބߌੀི׈ਫ਼đѩሹࢲਔྟཌఃؓൔղі༅ࢳಒࣚႨ০đمٚᇅט๝҂CMMؓᆌൈ๝bކӆႨႋ௪

2、ຉॶଆሰᇕ۲aཾѯหྟࣉྛਔбࢠݓਔകࢺb࣮࿹ࢠбਔྛࣉ૫ٚٳ෥๤༢aᄖگᇅ॥aЧӮ๤༢Ֆđ੻Ҧޙ௜࿢׈ಸ׈๝҂CMMؓᆌb༅ٳଽၘࣜࡹӮބᆞᄝࡹഡ4่ࠎႿMMC಼ྟᆰੀൻ׈۽ӱđбࢠਔᆃ4่ཌਫ਼׈࿢ࠩa༢๤ಸਈၛࠣᄎྛหb࿹࣮ࢲݔіૼđቋ࣍׈௜مཌྷ၍ѯᄛđކӆ؟ࢠඔॶଆሰႿႨൡđޙ௜࿢׈ಸ׈གྷൌمෘ྽ஆކࢲϮ၂đགྷൌၞaֆࡥمᇅטིषܱ௔ੱࢠمෘ྽ஆᆀࠇمෘߌоႨ০ၛॖđཬѯཾ࿢׈ԛൻđۚൌགྷ׈ಸ׈࿢௜ޙđᄝሰଆॶඔࢠഒൈಯॖൡႨbܱ࡯Սğଆॶ߄؟׈௜эߐఖĠᆰੀൻ׈ĠࢨะѯטᇅĠᄛѯ၍ཌྷטᇅĠ׈ಸ׈࿢௜ޙᇏ๭щᅣ໓Ağ઒ᆽѓང໓464MTğোٳğ1001-4551č2014Ď12-

3、1615-08Reviewofresearchingaboutmodularmultilevelconverter121111XIERuiđHULie-xiangđXVJian-guođZHOUZhi-chaođQIANFengđGAOZhi-lingč1.ZhejiangElectricPowerDesignInstituteđHangzhou310012đChinaĠ2.StateGridZhejiangElectricPowerCompanyđHangzhou310007đChinaĎAbstractğAimingatcomparingthedifferentsub-module

4、sofmodularmultilevelconverterčMMCĎđtheoperationprocessandcharacteristicswereanalyzed.Theequivalentcircuitsofoutputvoltageandcirculatingcurrentwereobtainedbythedetailedmathematicalexpressions.Alsotheapplicationsofthesedifferentsub-modulesofMMCweresummarized.Inordertocomparethedifferentmodulations

5、trategiesđtheaccurateexpressionswerecalculatedtoanalyzetheirlinearityandharmoniccharacteristics.Thentheperformancesofdifferentcapacitorvoltagebalancingmethodswereconcludedfromtheperspectivesofsystemcostđcontrollingcomplexityandsystemlossdistribution.Thevoltagelevelđsystemcapacityandoperationchar

6、acteristicsoffourMMCbasedHVDCprojectsinChinawerecomparedwitheachother.TheresearchingresultsindicatethatnearestlevelmodulationčNLMĎmethodiseasytoberealizedandusuallyadoptedforthelargescaleMMCwiththecapacitorvoltagesortingalgorithm.CarrierphaseshiftpulsewidthmodulationčCPS-PWMĎcanobtaintheperforma

7、ncesofhighequivalentswitchingfrequencyandlowdistortionđandcanbeusedwithcapacitorvoltagesortingalgorithmorclosed-loopbalancingmethodevenwhenthenumberofsub-modulesissmall.KeywordsğmodularmultilevelconverterčMMCĎĠhighvoltagedir