基于VSC-HVDC线路过电压抑制策略研究

Line overvoltage suppression strategy research based on VSC-HVDC

该文分析了空载线路电容效应产生的工频过电压和合闸空载线路产生的操作过电压的形成机理,在此基础上提出了利用联网的VSC-HVDC抑制这两种过电压的控制策略,建立了VSC-HVDC启动空载长线路的数学模型,并对VSC直接启动与柔性启动两种方式下启动空载长线路利用PSCAD/EMTDC进行了仿真。

This paper analyzes the formation mechanism of the no-load line capacitance effect pro-duce power frequency overvoltage and switching operating over-voltage.On the basis of this puts forward the use of networking of VSC-HVDC inhibit both overvoltage control strategy .Established the mathemati-cal model of VSC-HVDC start no-load long lines , the VSC directly start with the flexible start two start mode start no-load long lines using PSCAD/EMTDC simulation .