特高压直流换流站金属回线转换开关电磁暂态特性分析  

Analysis of electromagnetic transient characteristics of metallic return transfer breaker in UHVDC converter station

作　　者：刘守豹 侯玉成 盛明珺 方圆 童理 雷潇 LIU Shoubao;HOU Yucheng;SHENG Mingjun;FANG Yuan;TONG Li;LEI Xiao(Datang Hydropower Science&Technology Research Institute Co.,Ltd.,Nanning 530007,China;State Grid Sichuan Electric Power Research Institute,Chengdu 610094,China)

机构地区：[1]大唐水电科学技术研究院有限公司,广西南宁530007 [2]国网四川省电力公司电力科学研究院,四川成都610094

出　　处：《电力自动化设备》2021年第6期220-224,共5页Electric Power Automation Equipment

基　　金：中国大唐集团有限公司科技项目(智能水电设备状态评估及仿真关键技术研究及应用)。

摘　　要：相比交流断路器,直流断路器的开断过程较为复杂,开展直流开关电磁暂态模拟具有重要的理论和现实意义。以某特高压直流换流站金属回线转换开关(MRTB)避雷器爆炸事故为分析对象,采用PSCAD/EMTDC建立仿真模型。利用Mayr电弧方程对直流断路器动态电阻进行模拟,将MRTB纳入完整的直流系统对其暂态过程进行分析,对MRTB开断过程中避雷器能量吸收进行量化计算,确定了避雷器爆炸故障原因。实现了对MRTB开断过程的电磁暂态仿真分析,对直流断路器的制造和运维具有重要参考价值。Compared with AC circuit breaker,the breaking process of DC circuit breaker is more complex,so it has important theoretical and practical significance to carry out electromagnetic transient simulation of DC circuit breaker.The explosion accident of arrester in a UHVDC MRTB(Metallic Return Transfer Breaker)is selected as the research object,the simulation model is built by PSCAD/EMTDC.The Mayr arc equation is used to simulate the dynamic resistance of DC circuit breaker.The MRTB is integrated into a complete DC system to analyze its transient process.The energy absorption of arrester during the breaking process of MRTB is quantitatively calculated,which determines the cause of the explosion failure of the arrester.The electromagnetic transient simulation analysis of UHVDC switch breaking process is realized,which has important reference value for the manufacture,operation and maintenance of DC circuit breaker.

关 键 词：特高压直流 换流站 金属回线转换开关 电磁暂态 电弧 避雷器 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM862