±1100 kV/12 GW特高压换流阀关键技术研究  

Research on Key Technologies of ±1100 kV/12 GW UHV Converter Valve

作　　者：马元社 苟锐锋 MA Yuan-she;GOU Rui-feng(Xi'an XD Power Systems Co.,Ltd.,Xi'an 710065,China)

机构地区：[1]西安西电电力系统有限公司,陕西西安710065

出　　处：《电力电子技术》2023年第11期40-42,67,共4页Power Electronics

摘　　要：随着特高压(UHV)直流输电技术的不断成熟和完善,输送容量又达到了新高度,总结了±1 100 kV/12 GW UHV换流阀设计所采用的关键技术,此处仅从换流阀关断特性研究、结温控制技术研究和型式试验展开分析,首先结合晶闸管特性和试验数据,提出了换流阀不同运行工况下反向恢复电荷修正函数;在此基础上根据换流阀内部拓扑结构,提出了晶闸管结温计算方法,建立了换流阀应力分析模型。所设计制造的±1 100 kV/12GW晶闸管换流阀,根据IEC 60700-1标准通过了全套型式试验,并应用于世界上第一条电压等级最高、输送容量最大的“昌吉-古泉±1 100 kV/12 GW UHV直流工程”,为后续UHV换流阀精益化设计奠定了良好基础。With the continuous maturity and improvement of ultra-high voltage(UHV)direct current transmission tech-nology,transmission capacity has reached a new height.The key technologies used in the design of±1100 kV/12 GW UHV converter valves are summarized.Due to space constraints,only research on the turn-off characteristics of con-verter valves,junction temperature control technology,and type tests are analyzed.Firstly,combined with thyristor characteristics and experimental data,the reverse recovery charge correction function of the converter valve under different operating conditions is proposed.Based on this,according to the internal topology of the converter valve,a calculation method for the junction temperature of the thyristor is proposed,and a stress analysis model for the converter valve is established.The±1100 kV/12 GW thyristor converter valve designed and manufactured has passed a full set of type tests in accordance with the IEC60700-1 standard,and has been applied to the world's first"Changji Guquan+1100 kV/12 GW UHV direct current Project"with the highest voltage level and the largest transmission capacity,wh-ich also lays a good foundation for the subsequent lean design of UHV converter valves.

关 键 词：换流阀 关断特性 结温控制 

分 类 号：TM721.1[电气工程—电力系统及自动化]