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）04-1415-08中图分类号：TM721文献标志码：A学科代码：470·40基于能量分布的新能源场站送出线路纵联保护杨国生1，樊沛林1，王聪博1，余越1，吕鹏飞2，梁英1，张志2（1．电网安全与节能国家重点实验室(中国电力科学研究院有限公司)，北京市海淀区100192；2．国家电网有限公司，北京市西城区100031）PilotProtectionBasedonEnergyDistributionforTransmissionLineConnectedtoRenewablePowerPlantsYANGGuosheng1,FANPeilin1,WANGCongbo1,YUYue1,LÜPengfei2,LIANGYing1,ZHANGZhi2(1.StateKeyLaboratoryofPowerGridSafetyandEnergyConservation(ChinaElectricPowerResearchInstitute),HaidianDistrict,Beijing100192,China;2.StateGridCorporationofChina,XichengDistrict,Beijing100031,China)ABSTRACT:Withtheincreaseofthescaleofrenewableenergy,powerelectronicdevicesinpowersystemsarealsoincreasing.Thiscausestheshort-circuitcurrentsofthetransmissionlinetopresentthecharacteristicsofcontrolledphaseangles,limitedamplitudes,etc.,whichbringsnewchallengestothetraditionalprotectionbasedonthepowerfrequencycomponents.Byutilizingthedifferencedistributionofthedifferentialcurrentfrequencybandsintheinternalandtheexternalareafaults,thesignalenergyisdefinedtocharacterizethedifferencedistributionofdifferentialcurrentfrequencybandsintheinternalandtheexternalareafaults.Then,anewcriterionofpilotprotectionbasedontheenergydistributionofdifferentialcurrentfrequencybandsisproposed.Thisprotectiondoesnotrelyonthepowerfrequencyandislessaffectedbythenewcharacteristicsofshort-circuitcurrentbroughtbythepowerelectronicdevices.Itcanbeappliedtothetransmissionlinesofdifferenttypesofthenewenergystations.Theproposedprotectionprincipleisverifiedbysimulation.Thefastestactiontimeoftheprotectionschemeis3ms,andithasthestrongabilitytowithstandfaultresistance.KEYWORDS:renewableenergygridconnection;faultanalysis;differentialprotection;energydistribution摘要：随着新能源规模的提升，电力系统中电力电子装置的比例也在升高，使得送出线路的短路电流出现相角受控、幅值受限等特性，对以工...
