特高压输电线路防舞装置的应用仿真

Simulation of Anti-galloping Device's Application in UHV Transmission Line

为保障特高压输电线路安全可靠运行,以郑州尖山真型输电线路试验基地特高压8分裂试验段为基础,开展了特高压输电线路防舞装置应用的仿真研究。首先建立了特高压8分裂线路和相地间隔棒的有限元模型,对8分裂线路模型进行气动激励和舞动时程分析,并对比相地间隔棒安装前后系统模型的响应情况;分析了相地间隔棒在不同预紧力、不同安装方式下的防舞动效果。仿真结果表明:安装相地间隔棒后,档距中点最大峰峰值较未安装时缩小了62%,动张力标准差减小了77.5%,舞动被明显抑制;同时,适当提高相地间隔棒的预紧力、配合一定预紧力逆风向与导线连接能够使相地间隔棒起到更好的舞动抑制效果。

To guarantee safe operation of UHV transmission lines, we researched and simulated anti-galloping device which was based on real overhead transmission line in Comprehensive Test Technology Laboratory in Zhengzhou. We firstly established a finite element model of UHV transmission line and phase-to-ground spacer, simulated the aerody- namic actuation and the process of galloping, compared the response of the system before and after the device installed, and analyzed the effects of different pre-tightening forces and different installations. The results show that phase-to-ground spacer works well for anti-galloping, the peak value of span midpoint decreases by 62%, and the stand- ard deviation of dynamic tension decreases by 77.5%, indicating that galloping of the line is significantly inhibited. At the same time, increasing pre-tightening force appropriately and coordinating against wind with appropriate pre-tightening force can make the device to work better.