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）04-1432-07中图分类号：TM721文献标志码：A学科代码：470·40基于励磁绕组差模电流基频分量的新型磁阀式并联电抗器匝间保护方案郑涛1，孟令昆1，杨剑友2，田浩宇1，苏毅3（1．新能源电力系统国家重点实验室(华北电力大学)，北京市昌平区102206；2．国网温州供电公司，浙江省温州市325000；3．北京四方继保自动化股份有限公司，北京市海淀区100085）TurntoTurnProtectionSchemeforNovelMagneticValveControllableReactorBasedonFundamentalFrequencyComponentofDifferentialModeCurrentofExcitationWindingZHENGTao1,MENGLingkun1,YANGJianyou2,TIANHaoyu1,SUYi3(1.StateKeyLaboratoryofAlternateElectricalPowerSystemWithRenewableEnergySource(NorthChinaElectricPowerUniversity),ChangpingDistrict,Beijing102206,China;2.StateGridWenzhouElectricPowerSupplyCompany,Wenzhou325000,ZhejiangProvince,China;3.BeijingSifangAutomationCo.,Ltd.,HaidianDistrict,Beijing100085,China)ABSTRACT:Asanewtypeofreactivepowercompensationdevice,themagneticvalvecontrollablereactor(MVCR)realizesthesmoothregulationofthereactivepowerinawiderange,andtheneffectivelysolvetheproblemofvoltagefluctuationcausedbyreactivepowerimbalance.Inthispaper,anovelMVCRisstudied.Firstly,thetopologyofthenovelMVCRisintroduced,andtheelectricalcharacteristicsoftheexcitationwindingduringitsnormaloperationareanalyzed.Onthebasis,thefaultcharacteristicsofthenovelMVCRexcitationwindingsandworkingwindingsincaseoftheinter-turnfaultarediscussed,andtheconceptofdifferentialmodecurrentoftheexcitationwindingisintroducedtocharacterizethecharacteristicsofinterturnfault.Whentheinter-turnfaultoccurs,therewillbeabigfundamentalfrequencycomponentinthedifferentialmodecurrentofthenovelMVCRexcitationwindings.Basedonthisfeature,aninterturnfaultprotectionschemebasedonthefundamentalfrequencycomponentofthedifferentialmodecurrentoftheexcitationwindingsisproposed,andtheadaptabilityofthisprotectionschemeinthetransientprocessofthepre-excitationclosingisanalyzed.Finally,thefeasibilityandeffectivenessofthenove...
