Research on the Test of Transmission Line Galloping

3rd International Conference on Energy Equipment Science and Engineering

Zhang, Lichun^1 ; Li, Qing^2 ; Lv, Zhongbin^2 ; Ji, Kunpeng^1 ; Liu, Bin^1

China Electric Power Research Institute Beijing, 100055, China^1

Electric Power Research Institute of State Grid Henan Electric Power Company, Zhengzhou

450052, China^2

关键词: Development process;    Early Warning System;    Environmental factors;    Environmental temperature;    Meteorological condition;    Scientific references;    Structural parameter;    Wind tunnel tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/128/1/012123/pdf
DOI  :  10.1088/1755-1315/128/1/012123

来源: IOP

【 摘 要 】

The load of iced transmission line and the load generated by galloping after the conductor are covered by ice all may cause severe circuit faults, such as tripping, conductor breaking, armor clamp damage and even tower collapse, thus severely threatening running safety of power system. The generation and development processes of galloping of power transmission line is very complicated, and numerous factors may influence the galloping excitation, such as environmental factors, terrain factors and structural parameters of power transmission line; in which, the ice covering of conductor is one of necessary factors causing galloping. Therefore, researches on ice covering increasing test of different types of conductors under different meteorological conditions have been conducted in large-sized multi-functional phytotron, thus obtaining the relation curve of ice covering increasing of conductor along with time under different conditions, and analyzing factors influencing increasing of ice covering. The research result shows that under the same ice covering conditions, the increasing of ice covering of conductor with small diameter is relatively rapid; both environmental temperature and wind speed have obvious influence on increasing of ice covering of conductor, and the environmental temperature will decide the type of ice covering of conductor surface. Meanwhile, after wind tunnel tests targeting conductors with different ice covering shapes, pneumatic stability loss characteristics of conductors with different ice shapes have been obtained. Research results have important scientific reference value for revealing the mechanism of galloping of iced power transmission line, and have relatively high engineering practicability value for promoting realization of early warning system for galloping of iced power transmission line.