特高压直流输电线路全启动过电压仿真分析

Simulation Analysis of Full-voltage Starting Over-voltage on UHVDC Transmission Lines

故障或操作引起的过电压是换流站直流侧设备绝缘的主要威胁,针对这个问题,采用EMTDC为计算工具,对±800kV的直流输电线路的全启动过电压进行了分析,特别是对阀桥的顶点、线路的首端和线路末端3个节点的过电压进行了精确计算,结果表明直流输电线路的全启动过电压也应在建设和运行中予以重视。

The operating voltage caused by fault or switch is the main threat of the dc-side equipment insulation. This paper analysis on the over-voltage of ±800kV DC line using EMTDC, especially for the top of valve bridge, the liead end of line and the end of line. The research shows that full-voltage start-up over-voltage of DC should also be paid attention to in the construction and operation.