舟山多端柔性直流工程系统方案

System Scheme of Zhoushan Multi-Terminals VSC-HVDC Project

舟山多端柔性直流工程是目前世界上在建的端数最多、容量最大的柔性直流工程。工程新建5座换流站,总容量达1 000 MW,电压等级为±200 kV,各换流站间采用电缆连接。舟山多端柔性直流工程的成套设计、关键设备制造等均由国内相关单位完成,工程建成后将进一步改善舟山群岛的电网结构,提高电网供电可靠性。提出舟山柔性直流工程的系统方案,包括换流站主接线、运行方式、主回路参数与功率运行圆图、控制保护策略等,对于指导我国后续建设的大容量柔性直流工程具有重要的参考价值。

Zhoushan multi-terminals voltage source converter based high voltage direct current （VSC-HVDC） project, with the most terminal number and the largest converter capacity in the world, will construct 5 ± 200 kV converter stations with the total capacity of 1 000 MW, which are interlinked by cables. The complete design and key equipment of Zhoushan multi-terminals VSC-HVDC project were provided by China domestic company. The grid structure of Zhoushan will be enhanced and the reliability of power supply can be increased after the project being put into operation. This paper introduced the system scheme of Zhoushan VSC-HVDC project, including main connection of convertor station, operation modes, main circuit parameters, active and reactive power diagram, control and protection strategy, etc. The result has important reference value to the follow-up construction of high-capacity VSC-HVDC project in China.