柔性直流输电在交直流混联电网中的应用与展望
POWERNOKI直流输电技术全国重点实验室中国南方电网StateKeyLaboratoryofHVDCCHINASOUTHERNPOWERGRID2023JINAN柔性直流输电在交直流混联电网中的应用与展望APPLICATIONANDPROSPECTOFVSC-HVDCINAC/DCHYBRIDPOWERGRID黄伟煌南方电网科学研究院Weihuang HUANGSEPRI-CSG2023年9月22日，济南22ndSept.,2023，JINAN春 提纲CONTENTS柔性直流的技术特点TechnicalcharacteristicsofVSC-HVDC柔性直流的发展现状DevelopmentofVSC-HVDC川.柔性直流在大电网中发挥的作用RoleofVSC-HVDCinLargePowerGridsIV.柔性直流在新型电力系统的应用与展望ApplicationandProspectofVSC-HVDCinNewPowerSystems2 柔性直流技术特点VsC-HVDCtechnicalcharacteristics柔性直流是采用全控型功率器件和模块化拓扑结构的新一代直流输电技术，可控性高、适应性好，可实现有功和无功独立解耦的全域运行。VSC-HVDC is a newgenerationofDc transmissiontechnologythatadopts fully-controlledpowerdevices and modularized topology,withhighcontrollability,andcanrealizefourquadrantsoperationwithdecouplingcontrolofactiveandreactivepower.除了输电外，柔性直流能否部分取代交流系统元件的功能，例如“交流联络线模拟”“虚拟电磁环网”？“直流电厂”？这是本报告主要讨论的问题之Inadditiontotransmission,canVSC-HVDCpartiallyreplacethefunctionsofACsystemcomponents,suchas"Aclineemulation","Virtualelectromagneticloop","Dcpowerstation"?Thesearethemainquestionsthatwillbediscussedinthisreport.“箱革元A“箱量元B箱量元直流侧正极功率模块动率模块功率模块第二象限第一象限母线模功率模块功率模块quadrant2quadrant1桥臂有功和无功独立解耦的全域运行半桥子模块直流侧Half-bridge ModuleIndependent decouplingofactiveandreactivepowerfor full-domainoperation直流侧负极鲜线全桥子模块第三象限第四象限柔性直流拓扑结构Full-bridge Modulequadrant3quadrant 4VSC-HVDCtopology3 提纲CONTENTS柔性直流的技术特点TechnicalcharacteristicsofVSC-HVDo柔性直流的发展现状DevelopmentofVSC-HVDC川I.柔性直流在大电网中发挥的作用RoleofVSC-HVDCinLargePowerGridsIV.柔性直流在新型电力系统的应用与展望ApplicationandProspectofVSC-HVDCinNewPowerSystems 柔性直流技术发展现状DevelopmentofVSC-HVDC柔性直流技术已成为全球关注热点和发展趋势VSC-HVDCtechnologyhasbecomeaglobalconcernanddevelopmenttrend已运行的直流工程，传统直流占大多数、达到70%，柔性直流占21%LCCaccountsforthemajority(70%)oftheHVDCprojectsinoperation,andVSC-HVDCaccountsfor21%规划中的直流工程，柔性直流成为主流方案，规划数量是传统直流的2倍AmongplannedHVDCprojects,VSC-HVDChasbecomethemainstream,twiceofconventionalLCC3%86%16%12%331921%LETT39%ETTLTTLTT8454%VSCVSCMixtureMixture25Unknown21Unknown16%43%00%已运行直流工程数据来源：CIGREB4规划建设中直流工程5HVDCprojectsinoperationData source: CIGRE B4HVDCprojectsunderplanningandconstruction 柔性直流技术发展现状DevelopmentofVSC-HVDC柔性直流工程的电压和容量不断提高ThevoltageandcapacityofVSC-HVDCcontinuetoincrease.·中国虽然起步晚，但无论是从发展速度还是工程容量上，都呈赶超趋势Although China started late, it is catching up both in terms of development speed and engineering capacity800乌东德国外直流电压5000MW中国600张北3000MW±800kvINEFLE容量：1000MW=30Q0MW→5000MW鲁西1000MW1000MWNord Lin↑400Transbaycable渝鄂1400MW±500kVCrosssoundcable400MW4*1250MW330MW厦门2001000MW1Hellsjon舟山多端南汇±320kv10MW20MW南澳多端400MW中海油200MW0TOMW199720022010201320162020年份6 柔性直流技术发展现状DevelopmentofVsC-HVDC目前柔性直流在电网互联、远距离输电、新能源送出、中低压配电等四类主要场景得到了广泛应用Currently,VsC-HVDCiswidelyused infourmajor scenarios,includinggridinterconnection,long-distancepowertransmission,renewableenergytransmission,andpowerdistribution.电网互联新能源送出回丰合柔性直流技术GridRenewable EnergyAYInterconnectionTransmission远距离输电中国团80%低压配网交流微电网直流微电网g-distancePowerPowerTransmissionDistribution德能 柔性直流技术应用于电网互联VSC-HVDCTechnologyAppliedtoGridlnterconnection柔直应用于电网互联，实现两个电网电力交换，并提高已有交流电网安全稳定水平Vsc-HVDC for grid interconnection is applied to exchange power between two grids and improve thesecurityandstabilityofexistingACgrids，电网互联可实现互供电力、互通有无、互为备用，可减少事故备用容量，增强抵御事故能力柔直不增加交流短路电流，不受交流系统短路容量限制，可快速灵活调节潮流，是电网互联的重要技术手段VSC-HVDCdoesnotincreasetheshort-circuitcurrentoftheACpowergrid,notlimitedbySCRoftheACsystem,canquicklyandflexiblyregulatethepowerflow,andisanimportanttechnicalsolutionforgridinterconnection国内外已建成的柔直背靠背联网工程分区2Completedback-to-backVSC-HVDCprojectsinChinaandabroad工程名称容量交流电压投入时间美国EaglePass工程36MW/±15.9kV132kV2000分区1分区3澳大利亚Murraylink工程220MW/±150kV132/220kV2002爱沙尼亚Estlink工程350MW/±150kV400/330kV2006英国Britain-500MW/±200kV400kV2013Ireland工程鲁西背靠背桑直工程1000MW/±350kV500kV2016渝鄂背靠背柔直工程1250MW/±420kV500kV2019柔直应用手交流电网互联中南通道柔直工程1500MW/±400kV500kV2022VSc-HVDCapplicationsforACgridinterconnections8 柔性直流技术应用于电网互联VSC-HVDCTechnologyAppliedtoGridlnterconnection电网互联典型应用Typicalapplicationsforgridinterconnection鲁西背靠背柔直工程：首次将柔性直流用于西电东送主通道，实现电网分区柔性互联Luxiback-to-backvSC-HvDCproject:thefirsttimetouseVSC-HVDCforthemainchannelofwest-eastpowertransmission,realizingflexibleinterconnectionofasynchronouspowergrids.厂东电网背靠背直工程：应用于广东电网负荷中心，实现不同交流电网区域交流系统敌障的隔离，提供快速功率控制与紧急功率支撑，增加电网稳定性GuangdongBack-to-BackvsC-HvDCProject:AppliedintheloadcenterofGuangdong,itrealizestheisolationofACsystemfaultsindifferentACpowergridareas,providesfastpowercontrolandemergencypowersupport,andincreasesthestabilityofthepowergrid滇月东罗平雨变电站汪罗平背靠背广西云南百色广东电网背靠背柔直工程鲁西背靠背桑直工程Guangdongback-to-backVSC-HVDCprojectLuxiback-to-backVSC-HVDCproject9 柔性直流技术应用于远距离输电VSC-HVDCTechnologyAppliedtoLongDistancePowerTransmission柔直运行控制，拓扑结构和核心器件的发展，促进了电压等级及输电距离的提升Development of control strategy,circuit topology and power electronic devices have facilitated the increase ofvoltagelevelsandtransmissiondistances-双阀组串联拓扑与3000A等级器件研制，将柔直电压提升至±800kV，容量提升至5000MW-Dual-valve serial topology and 3000A-rated device development to increase voltage to ±800kV and capacity to 5000Mw加装直流断路器或“全桥+半桥”混合拓扑，可阻隔直流故障电流，实现远距离架空线故障的清除和快速重启-ByinstallingDCcircuitbreakersoradopting"fullbridg
