第51卷第4期电力系统保护与控制Vol.51No.42023年2月16日PowerSystemProtectionandControlFeb.16,2023DOI:10.19783/j.cnki.pspc.221033基于暂态高频能量的直驱风场汇集线路保护孔祥敏1,刘丽花1,张亮红1,赵文越2,马静2(1.国网山西省电力公司经济技术研究院，山西太原030024；2.华北电力大学电气与电子工程学院，北京102206)摘要：针对直驱风场汇集线路故障难以识别的问题，提出了一种基于暂态高频能量的直驱风场汇集线路保护方法。首先，基于风机变流器控制系统与电气参数影响，结合元件在高频区段的暂态特性，建立由感性阻抗构成的风场汇集线路暂态高频模型。在此基础上，建立区内外故障下的暂态高频网络，根据不同故障场景与保护安装处暂态高频能量的匹配特性，构建基于暂态高频能量方向差异的保护判据。最后，在RT-LAB仿真平台验证了所提方法在各种故障情况下，均能正确识别区内外故障，故障识别不受同步误差影响，耐过渡电阻能力强。关键词：直驱风场；控制策略；汇集线路；暂态能量；方向保护Protectionofadirect-drivenwindfarmcollectionlinebasedontransienthigh-frequencyenergyKONGXiangmin1,LIULihua1,ZHANGLianghong1,ZHAOWenyue2,MAJing2(1.EconomicandElectricalResearchInstituteofShanxiElectricalPowerCompanyofSGCC,Taiyuan030024,China;2.SchoolofElectricalandElectronicEngineering,NorthChinaElectricPowerUniversity,Beijing102206,China)Abstract:Itisdifficulttoidentifyafaultonadirect-drivenwindfarmcollectionline.Thusaprotectionofthelinebasedontransienthigh-frequencyenergyisproposed.First,consideringtheconvertercontrolstrategy,theelectricalparametersandcomponenttransientcharacteristicsinthehigh-frequencysection,awindfarmcollectionlinetransienthigh-frequencymodelcomposedofinductiveimpedanceisestablished.Thenatransienthigh-frequencynetworkofinternalorexternalfaultsisestablished.Accordingtothematchingdegreeofdifferentfaultcasesandtransienthighfrequencyenergyattheprotectioninstallationsite,aprotectioncriterionisconstructedusingthedifferenceoftransienthigh-frequencyenergydirection.Finally,anRT-LABsimulationplatformverifiesthatthismethodcancorrectlyidentifytheinternalorexternalfaultsundervariousfaultconditions.Thefaultidentificationisnotaffectedbysynchr...
