±400kV青藏直流输电工程用直流转换开关研究与设计  

Research and Design of DC Transfer Switches for ±400 k V Qinghai to Tibet HVDC Transmission Project

作　　者：高文[1] 曹蕤[1] 焦秋忠[1] 赵曦英[1] 张文兵[1] 白笑怡 

机构地区：[1]西安高压电器研究院有限责任公司,西安710077

出　　处：《高压电器》2015年第11期79-84,共6页High Voltage Apparatus

摘　　要：高压直流输电作为最为经济的能源输送方式,具有输送容量大、传输距离远、损耗低等多种优势,±400 k V青藏直流工程的建设实现了西北与西藏电网的联网,优化了能源资源配置。直流系统使用直流转换开关可以获得多种功能和运行的灵活性。文中以研发直流转换开关为目标,阐述了无源型基本原理,从产品的总体结构、断路器的电弧电压与直流开断的关系、自激振荡回路的元件设计及工程设计等方面进行了研究。所研发的直流转换开关通过了试验验证,并已应用于青藏直流输电工程的拉萨换流站。As the most economical way to delivery energy, high voltage direct current（HVDC） transmission systemhas many advantages, such as large transmission capability, long distance transmission, low loss and so on. Theconstruction of the ±400 kV Qinghai to Tibet HVDC transmission project interconnected the northwest power gridand Tibet power grid, and optimized the allocation of energy resources in China. Using DC transfer switches, the DCsystem could obtain a variety of functions and operate flexibly. Aiming at developing DC transfer switches, this paperillustrates the basic principles of passive DC transfer switches, studies the overall structure of the product, therelationship between the arc voltage of circuit breaker and the DC interruption, designs elements of the self-excitedoscillation circuit and the engineering designs. The developed DC transfer switch has passed the test and gotcertification, and now are used in Lhasa converter station of HVDC transmission project form Qinghai to Tibet.

关 键 词：直流转换开关 无源型 自激振荡回路 断路器 

分 类 号：TM721.1[电气工程—电力系统及自动化]