高压直流输电系统逆变站最后断路器跳闸装置配置原则

高压直流输电系统逆变站最后断路器跳闸装置是非常重要的换流站直流系统控制设备,主要防止直流系统运行时逆变站交流负荷突然全部断开造成换流站交流侧及其它部分过电压,导致交、直流设备绝缘损坏。文章结合我国第一个全面国产化高压直流工程——灵宝背靠背直流联网工程,分析了最后断路器跳闸装置配置原则,结合工程系统调试实际对该控制功能进行了优化和完善,并总结了最后断路器跳闸装置设计原则和调试经验,这些经验同样适用于其它高压直流输电系统,有助于提高我国高压直流输电工程的设计、调试和运行水平。

Configuration Principle of Last Breaker Trip Equipment in Inverter Station of HVDC

The last breaker trip equipment in inverter station of HVDC system is a very important control device in converter station of DC system, whose main function is to prevent overvoltages at the AC side in converter station and other parts, which are caused by sudden trip-out of all AC loads in inverter station while the DC system is being operated, and the insulation damage of AC and DC equipments caused by the overvoltages. Taking the Lingbao back-to-back HVDC project for example, which is the first fully home-produced HVDC project in China, the configuration principle of last breaker trip equipment is analyzed . Combining with practical commissioning of this project, the control functions of last breaker trip equipment are optimized and perfected, and the design principle and commissioning experiences of this equipment are summarized. These experiences are suitable to other HVDC projects and are also helpful for improving the design, commissioning and operation level of HVDC projects in China.