三相光伏并网Z源逆变器的比例谐振控制.pdf

144Vol14No4

20104ELECTRICMACHINESANDCONTROLApr.2010

Z-

王继东,朱雪玲,苏海滨,王玲花

(,450011)

:将具有独特的X型网络的Z源逆变器应用于光伏并网系统,利用逆变器桥臂直通状态实

现直流升压对Z源逆变器的拓扑结构和工作原理进行了详细的分析;根据电网电压定向的控

制策略结合比例谐振控制器,利用改进的空间矢量脉宽调制方法实现了逆变器并网控制,使Z源

光伏并网系统能够动态跟踪光伏电池最大功率点电压,输出电流和电网电压相位,实现单位功率因

数运行和电流波形正弦化仿真结果表明系统具有良好的静态和动态性能,验证了采用的系统结

构和控制策略的有效性和可行性

:光伏发电;Z源逆变器;并网;电网电压定向;比例谐振控制器;空间矢量脉宽调制;最

大功率点跟踪

:TM44:A:1007-449X(2010)04-008-0

ProportionalresonantcontrolforZsourceinverter

inthreephasePVgridconnectedsystem

WANGJidong,ZHUXueling,SUHaibin,WANGLinghua

(CollegeofElectricalEngineering,NorthChinaUniversityofWaterConservancyandElectricPower,

Zhengzhou450011,China)

Abstract:Inthispaper,theZsourceinverterwhichhasauniqueXtypeZsourcenetworkisisappliedin

threephasephotovoltaic(PV)gridconnectedsystem.TheZsourceinvertercanutilizetheshootthrough

statethatsmiultaneouslyturnsonbothpowerswitchesinalegtoboostaDClinkvoltage.Thecircuitto

pologyandbasicprinciplesoftheZsourceinverterweredescribedindetail.Thegridvoltageoriented

controliscombinedwithamodifiedspacevectorpulsewidthmodulationandproportionalresonant(PR)

controllersmadetheZsourceinvertergenerateasinusoidalACcurrentinphasewithgridvoltage.PV

generationsystemcantrackthemaxmiumpowerpointofthePVarrayandtransformp