第39卷第2期2023年2月电网与清洁能源PowerSystemandCleanEnergyVol.39No.2Feb.2023清洁能源CleanEnergy——————————基金项目:国家自然科学基金项目(51867007)。ProjectSupportedbytheNationalNaturalScienceFoundationofChina(51867007).ABSTRACT:Inresponsetotheproblemsofstochasticityofphotovoltaicpowergenerationandinabilitytoprovideinertialsustainforthesystem,thispaperstudiesthecontrolstrategyforphotovoltaichybridenergystoragebasedonvirtualsynchronousgenerator(VSG).Inordertosuppresspowerfluctuationsandhavegoodsystemresponse,thegridconnectionofthephotovoltaicenergystoragesideinverterisfirstrealizedbasedonVSGcontrol,whichenablesthefrequencyandvoltageofthesystemtoberegulatedautonomously.Next,toprolongthelifetimeofenergystoragecellandsolvetheproblemofcapacitydemand,animprovedtwo-stagelow-passfilteringmethodisadoptedtoachievepowerallocationforhybridenergystorage.Atthesametime,tokeepthestabilityofthesystemDCbusvoltage,adaptivefuzzyPIcontrolisadoptedtoachievedualclosed-loopcontrolofvoltageouterloopandcurrentinnerloop.Finally,simulationexperimentsareperformedtoverifytheeffectivenessandaccuracyoftheproposedcontrolmethod.KEYWORDS:virtualsynchronousgenerator;hybridenergystorage;adaptivefuzzyPI;powerdistribution摘要:针对光伏发电的随机性和无法给系统提供惯性支持的问题,研究了基于虚拟同步发电机(virtualsynchronousgenerator,VSG)的光伏混合储能的控制策略。为了抑制功率的波动和有较好的系统响应能力,首先通过基于VSG控制来实现光伏储能侧逆变器的并网,从而能自主地调节系统的频率和电压。其次为了能延长储能电池的寿命和解决容量需求的问题,采用了改进的二级低通滤波法来实现混合储能的功率分配。同时为了保持系统直流母线电压的稳定性,通过使用自适应模糊PI控制来实现电压外环和电流内环的双闭环控制。最后通过仿真实验来检验所提控制策略的有效性和准确性。关键词:虚拟同步发电机;混合储能;自适应模糊PI;功率分配近年以来,随着大量的可再生能源组成的分布式电源得到了迅猛的发展,光伏储能这类新能源并网的数目也在逐渐增长,给电网的正常运转带来了太多的问题[1-2]。采用传统的电力电子变流器的并网,通过矢量控...