直流断路器及阻尼快速恢复系统在舟山多端柔性直流输电工程中的应用

Application of DC Circuit Breaker and Damping Fast Recovery System in Multi Terminal Flexible DC Transmission Project in Zhoushan

介绍舟山多端柔性直流输电换流站直流断路器及阻尼快速恢复系统的基本情况,对直流断路器、谐振开关、阻尼模块等设备原理进行说明,分析直流输电系统快速重启动及换流站单站投退在工程中的应用,针对实际运行过程中发现的换流站极隔离失败的隐患,给出了解决方法,缩短直流故障清除和非故障端重启动时间,大大提高舟山多端柔性直流输电系统运行的可靠性。

This paper introduces DC circuit breaker and damping fast recovery system in multi-terminal flexi-ble DC transmission project in Zhoushan;besides,it describes principles of DC circuit breaker,resonantswitch,damping modules. Finally,it analyzes the engineering application of fast restart of DC transmissionsystem and single station switching of converter station. In accordance with potential hazards in polar isolationof converter station in operation,the paper proposes a solution to shorten time for DC fault handling andrestart at non-fault terminal,and therefore improve operation reliability of Zhoushan multi-terminal flexibleDC transmission system.