500 kV水平布置输电线路相地间隔棒防舞仿真分析

Simulation of Phase-to-ground Spacer for Anti-galloping of 500 kV Horizontal Arranged Transmission Lines

相地间隔棒是一种新型的输电线路防舞装置,针对500 kV水平布置线路舞动防治的现状,展开了500 kV水平布置输电线路和相地间隔棒防舞的仿真研究。建立了单档500 kV水平布置输电线路和相地间隔棒的有限元模型;模拟导线舞动时程,分析了500 kV水平布置线路的舞动特性;从线路舞动过程中的位移、轨迹以及张力等方面对比了安装相地间隔棒前后线路的舞动响应。分析结果表明:舞动对线路的危害极大,安装相地间隔棒能够大幅降低舞动幅值,减轻张力波动,对500 kV水平布置线路起到明显的抑舞作用。

Phase-to-ground spacer is a new kind of anti-galloping device. We simulated and researched the anti-galloping of 500 kV horizontal arranged transmission lines. Firstly, we established a finite element model of phase-to-ground spacer and 500 kV horizontal arranged transmission lines, simulated the galloping process of the lines, and analyzed the charac- teristics of conductor galloping. Then, we comparatively analyzed the line＇s galloping response before and after installation of the anti-galloping devices according to displacement, trajectory, and tension. The results show that gallop- ing will cause a great damage for transmission line, meanwhile, phase-to-ground spacer can reduce the amplitude of galloping and fluctuation of tension.