摘要
模块化多电平换流阀(MMC)作为柔性直流输电系统中的关键设备,其子模块的可靠性直接影响整个系统的安全稳定运行。文中系统设计了基于永磁双驱动旁路开关的主动旁路方案、基于双向转折晶闸管的被动旁路方案,并结合主动旁路的经济性和被动旁路的可靠性,设计了分级旁路方案。试验结果表明,主动旁路方案能主动下发旁路命令,可靠旁路故障子模块;在主动旁路方案失效的情况下,被动旁路方案可靠旁路故障子模块。所提方案解决了因子模块单一故障引起系统跳闸的难题,为后续柔性直流换流阀工程实施提供了设计指导。
As the key equipment of high voltage direct current(HVDC) flexible transmission system,the reliability of modular multilevel converter sub-module operation directly affects the safety and stability of the whole system. A sub-module bypass scheme is fully proposed. An active bypass scheme based on a permanent magnetic dual-drive bypass switch is designed. A passive bypass scheme based on breakover bidirectional thyristor is designed. Considering the economics of active bypass and the reliability of passive bypass,a hierarchical bypass scheme is designed. The test results show that fault sub-module can be reliable bypassed by command from the active bypass scheme. Meanwhile,in the case of the failure of active bypass scheme,the passive bypass scheme can reliably bypass the fault sub-module. The hierarchical bypass solves the problem that a single faulty sub-module causes the transfer system tripping. Design guidance for the implementation of HVDC-flexible valve is provided.
作者
段军
谢晔源
朱铭炼
殷冠贤
方太勋
DUAN Jun;XIE Yeyuan;ZHU Minglian;YIN Guanxian;FANG Taixun(NR Electrie Co.,Ltd.,Nanjing 211102,China)
出处
《电力工程技术》
2020年第4期207-213,共7页
Electric Power Engineering Technology
基金
国家重点研发计划资助项目(2017YFB0903100)。
关键词
柔性直流
模块化多电平(MMC)
换流阀
子模块
旁路方案
high voltage direct current(HVDC)flexible transmission system
modular multilevel converter(MMC)
value
submodule
bypass scheme
