第47卷第4期电网技术Vol.47No.42023年4月PowerSystemTechnologyApr.2023文章编号：1000-3673（2023）04-1395-12中图分类号：TM721文献标志码：A学科代码：470·40惯性同步构网型变换器定量感知电网频率的机理及抗干扰控制策略桑顺1,2，徐婷1，齐琛1，黄杰杰2，薛晓岑2（1．新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司)，北京市海淀区100192；2．南通大学电气工程学院，江苏省南通市226019）MechanismofQuantitativelySensingGridFrequencyandAnti-disturbanceControlStrategyfortheGrid-formingConverterSANGShun1,2,XUTing1,QIChen1,HUANGJiejie2,XUEXiaocen2(1.StateKeyLaboratoryofOperationandControlofRenewableEnergy&StorageSystems(ChinaElectricPowerResearchInstitute),HaidianDistrict,Beijing100192,China;2.SchoolofElectricalEngineering,NantongUniversity,Nantong226019,JiangsuProvince,China)ABSTRACT:Thegrid-formingcontrolbasedontheinertiasynchronouscontrolcanenabletheconvertertoautonomouslysensethegrid’sfrequencyfluctuation,whichhasgreatadvantagesintheapplicationofhigh-voltagedirectcurrenttransmissionsystems.However,thisgrid-formingcontrolstrategyiseasilydisturbedbyfactorssuchasgridvoltagefluctuationsintheprocessofsensingthegrid’sfrequency.Aimingattheseaboveissues,thispaperestablishesthesmall-signalmodelofthegrid-formingconverter,andrevealsthedynamiccouplingmechanismbetweenthedc-linkvoltageandthegridfrequency,thegridvoltageandtheinputmotiveforcefromtheperspectiveofdampingcharacteristics.Next,thehigh-frequencyandlow-frequencyanti-disturbancecontrollersarerespectivelyproposedtodealwithhighandlow-frequencydisturbances,sothatthedc-linkvoltageoftheconvertercanquantitativelysensethegridfrequencyandnotbedisturbedbyfactorssuchasgridvoltagefluctuations.Finally,theparameterdesignmethodoftheproposedhigh-frequencyandlow-frequencyanti-disturbancecontrollersispresented,andtheinfluenceoftheanti-disturbancecontrollersontheinteractionstabilitybetweenthegrid-formingconverterandthegridisanalyzed.OnthePSCAD/EMTDCplatform,thecorrectnessofthetheoreticalanalysisandthefeasibilityoftheproposedcontrolmethodsarever...
