第24卷第2期2023年2月电气技术ElectricalEngineeringVol.24No.2Feb.2023厦门柔直工程交流故障穿越失败事件分析及改进措施陈明泉1,2林国栋2晁武杰2严昌华1,2肖世挺1(1.福建中试所电力调整试验有限责任公司,福州350007;2.国网福建省电力有限公司电力科学研究院,福州350007)摘要针对±320kV厦门柔性直流输电工程中一起区外故障引起换流站交流故障穿越失败的事件进行分析。首先简要介绍厦门柔直工程接线方式及配置,然后详细阐述交流故障穿越失败事件的经过及现象,分析并指出事件原因。结合厦门柔直提升改造工程,提出针对阀控系统和极控制保护系统的优化方案,并通过各种运行工况下的仿真试验,验证了方案的可行性,以期为同类工程的改造提升提供参考。关键词:柔性直流;故障穿越;阀控系统;极控制保护系统;桥臂过电流保护AnalysisandimprovementforACfaultride-throughfailureeventinXiamenflexibleHVDCtransmissionprojectCHENMingquan1,2LINGuodong2CHAOWujie2YANChanghua1,2XIAOShiting1(1.FujianZhongshisuoElectricPowerTesting&CommissiongCo.,Ltd,Fuzhou350007;2.StateGridFujianElectricPowerResearchInstitute,Fuzhou350007)AbstractThispaperanalyzestheACfaultride-throughfailureeventofconverterstationcausedbyanexternalfaultinXiamen±320kVflexibleHVDCtransmissionproject.Theconnectionmodeandconfigurationsoftheprojectareintroduced,theprocessandphenomenonoftheeventaredescribed,andthecausesoftheeventareanalyzedandpointedoutinthispaper.IncombinationwiththeXiamenflexibleHVDCtransmissionimprovementproject,theoptimizationschemeforthevalvecontrolsystem,thepolecontrolsystemandthepoleprotectionsystemisproposed.Throughthesimulationundervariousoperatingconditions,thefeasibilityoftheschemeisverified,andtheexperiencecanbeusedasreferenceforsimilarimprovementprojects.Keywords:flexibleDC;faultride-through;valvebasecontroller(VBC);polecontrolandpro-tection(PCP)system;armovercurrentprotection0引言厦门柔性直流输电科技示范工程首次采用对称双极接线方案[1-5],电压等级±320kV,直流电流1600A,输送容量1000MW。相比于其他接线方式,对称双极接线方式供电可靠性更高。正常运行工况下,工程为双极金属回线方式运行[6],两极功率平衡,金属回线无工作电流。若发生单极故障,故障极...