基于ATPDraw的高铁线路合闸过电压研究

Study of closing over-voltage based on ATPDraw for high-speed railway line

为研究新建高铁线路上的典型操作过电压对系统安全运行的影响,以330 kV高铁线路为研究对象,在分析合闸空载线路操作过电压物理过程的基础上,建立合理的电路模型;通过电力系统暂态分析软件ATPDraw对该电路模型进行仿真研究,并对4种不同方案下线路末端所产生的过电压大小值进行对比分析。结果表明:三相不同期合闸时,先合闸相产生的过电压比同期合闸产生的过电压要高;加装并联电抗器可有效抑制合闸过电压;三相不同期合闸产生的过电压在某些电源相角下可超过1.5倍。

The influence of operational over-voltage is studied for 330 kV high-speed railway line.The principle of over-voltage by closing no-load line is analyzed,and the reasonable line circuit model is established and simulated based on the power system transient analysis software ATPDraw.The over-voltages appeared on the line end under four schemes are analyzed and compared.Results show that,the over -voltage appeared on the first closed phase during the asynchronous three-phase closing is higher than that appeared during the synchronous three-phase closing;the shunt reactor can effectively suppress the closing over-voltage;the three-phase closing over-voltage under some closing angles phases may be 1.5 times higher.