南瑞直流技术路线换相失败状态量分析刘羽超,尹海涛(中国南方电网超高压输电公司广州局,广东广州510405)摘要:为了得到南瑞直流技术路线保护系统中换相失败状态量与换相失败次数的关系,基于保护系统换相失败判据,通过对比换相失败录波,研究各状态量与换流器交、直流侧电流的内在逻辑联系。分析换相失败发生前后换流器的倒换相过程,并从定义出发讨论各阀臂是否正常倒换相。总结出保护系统中换相失败状态量的特点,便于运维人员更充分地运用状态量分析换相失败过程。关键词:高压直流;换相失败;保护系统;状态量中图分类号:TM63DOI:10.19768/j.cnki.dgjs.2022.24.050AnalysisofCommutationFailureStateofNariDCTechnicalLineLIUYuchao,YINHaitao(GuangzhouBureau,CSGEHVPowerTransmissionCompany,Guangzhou510405,China)Abstract:InordertoobtaintherelationshipbetweencommutationfailurestatequantityintheprotectsystemofNariDCtechnicalrouteandcommutationfailuretimes,basedonthecommutationfailurecriterionoftheprotectsystem,bycom-paringthecommutationfailurerecordings,theinternallogicbetweeneachstatequantityandtheAC/DCsidecurrentoftheconverterisstudied.Thecommutationprocessoftheconverterbeforeandaftercommutationfailureisanalyzed,andwhethereachvalveisnormallycommutatedfromthedefinitionisdiscussed.Thecharacteristicsofcommutationfailurestatequantityintheprotectsystemaresummarized,whichi...