柔性直流输电在交直流混联电网中的应用与展望-42页.pdf

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WeihuangHUANGSEPRI-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-HVDCisanewgenerationofDctransmissiontechnologythatadoptsfully-controlledpowerdevicesandmodularizedtopology,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-bridgeModuleIndependentdecouplingofactiveandreactivepowerforfull-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-bridgeModulequadrant3quadrant4VSC-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5HVDCprojectsinoperationDatasource:CIGREB4HVDCprojectsunderplanningandconstruction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AlthoughChinastartedlate,itiscatchingupbothintermsofdevelopmentspeedandengineeringcapacity800乌东德国外直流电压5000MW中国600张北3000MW±800kvINEFLE容量：1000MW=30Q0MW→5000MW鲁西1000MW1000MWNordLin↑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-HVDCiswidelyusedinfourmajorscenarios,includinggridinterconnection,long-distancepowertransmission,renewableenergytransmission,andpowerdistribution.电网互联新能源送出回丰合柔性直流技术GridRenewableEnergyAYInterconnectionTransmission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-HVDCforgridinterconnectionisappliedtoexchangepowerbetweentwogr