第47卷第2期电网技术Vol.47No.22023年2月PowerSystemTechnologyFeb.2023文章编号：1000-3673（2023）02-0815-08中图分类号：TM721文献标志码：A学科代码：470·40自适应正负序复合控制的VSG低电压穿越策略董纪清，潘佳清，毛行奎（福州大学电气工程与自动化学院，福建省福州市350108）LowVoltageRide-throughStrategyofVSGBasedonAdaptivePositiveandNegativeSequenceCompositeControlDONGJiqing,PANJiaqing,MAOXingkui(CollegeofElectricalEngineeringandAutomation,FuzhouUniversity,Fuzhou350108,FujianProvince,China)ABSTRACT:Inordertosolvetheproblemofreducingthesystemequivalentdampingandinertiacausedbytheincreaseofdistributednewenergypenetration,somescholarsputforwardthevirtualsynchronousgenerator(VSG)controlstrategy.TheVSGmostlyadoptsthepositiveandnegativesequencecompoundcontrolbasedonthed-qaxisunderthetwo-phaserotatingcoordinatesystem,soastosuppressthenegativesequencecomponentinthegridcurrentwhenthegridvoltagedropsasymmetrically.However,thedelayofpositiveandnegativesequenceseparationworsensthetransitionprocessofVSGoutputcurrentwhenthegridvoltagesagfaultoccurrsorrecovers,resultinginanincreasedriskoftheVSGovercurrent.Aimingatthisproblem,thearticlefirstlyanalyzesthecharacteristicofgridvoltageequivalentamplitudewaveformswhenthegridvoltagedropssymmetricallyandasymmetrically,andalowvoltageride-throughstrategyoftheVSGthatmayautomaticallyidentifythefaulttypestoachievetheadaptivepositiveandnegativesequencecompoundcontrolisproposed.Themethoddoesnotonlysuppressthenegativesequencecomponentintheoutputcurrentunderasymmetricfaults,butalsoreducethedelayeffectofpositiveandnegativesequenceseparationandthepossibilityoftheVSGtransientovercurrent,makingthetransitionprocessoftheVSGoutputcurrentsmootherwhenthefaultoccurrsorrecovers.Finally,simulationsystemisbuilttoverifythefeasibilityoftheproposedmethod.KEYWORDS:virtualsynchronousgenerator;lowvoltageride-through;adaptivecontrol;positiveandnegativesequencecompoundcontrol摘要：为了解决分布式新能源渗透率提高带来电网的系统等效阻尼和惯性降低的问题，一些学者提出了虚拟同步发电...
