低电容电压应力准Z源光伏升压变换器的设计

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中图分类号：TN624-34；TM46 文献标识码：A 文章编号：1004-373X（2026）06-0056-08

Design of quasi-Z-source PV boost converter with low capacitor voltage stress

ZHANGGuochao，MA Xun，SHENKaiwen，DONGXiaoming，CHENYubao （InstituteofSolarEnergy，YunnanNormalUniversity，Kunming65O5OO，China）

Abstract：Under the "doublecarbon"goal，PVpowergenerationsystemsrequireadvancedDCconverters.Traditionalboost convertersfacehighcapacitorvoltagestress whenachievinghighvoltagegain.Toadressthis，aquasi-Z-sourcePVboostcoverter withlowcapacitorvoltagestressisprposed.Theconvertercanicreasethevoltagegainandreducethevoltagestresofthecapacitorbyadding thestructurewheretheswitched inductorandthreecapacitors dischargetotheloadtogether.Theconverter's working principle，componentvoltagestressandparameterdesignwereanalyzedindetailandthesimulationverificationand 100Wprototypeexperimentswereconducted.Theexperimentalresultsshowthat，whenthedutycycleisO.2O，theconverter efficiency can reach 94.4% and the voltage gain is 3.2 times.Under the conditionof the same output voltage，its capacitor voltagestressisO.4timesofthetraditionalquasi-Zsourcebosconverteranditshosalineardowwardtrendwithheicreaseof thedutycycle.Teesultssowthatheproposedimprovedquasi-Z-sourcecoverterofershighgaiandowcapacitorstress，aningsafetyandreliabilityofthesystem.Itissuitableforhighvoltagestressscenariosgeneratedbyphotovltaicpowergeneration and has a certain engineering practicability.

Keywords：quasi-Z-source;lowcapacitorvoltagestress;boostconverter;switchedinductor;highvoltagegain;photovolaic power generation

0 引言

随着“碳达峰”“碳中和"战略决策的落实，新能源发电技术不断发展，电力系统的脱碳已成为当前研究的热点。（剩余6278字）