Preliminary Research On Aided Design Technology Of Aeolian Vibration Resistance Scheme For Large-span Transmission Lines

With the continuous expansion of China’s power grid construction scale,especially the construction of long-distance uhv transmission lines,there are more and more projects across rivers,rivers and even across the sea.With higher hanging points,larger spacing,greater tension,and more steel cores in large span projects,the difference between transmission wires with ordinary spacing is obvious,which leads to more severe situation of the problem of breeze vibration.The current wind vibration response analysis method and anti-wind vibration design method are difficult to meet the needs of the project.It is of great significance to carry out technical research on wind-proof vibration scheme of long-span transmission lines and to provide efficient and practical design methods for anti-vibration,so as to ensure the safety and reliability of long-span projects.The main research contents of this paper are as follows:(1)On the basis of the transmission wire breeze vibration theory,established a conductor and vibration damper hammer,such as vibration analysis model of vibration control hardware,wire solution obtained by calculation system of the vibration mode of each components,parameters such as energy consumption,analysis of the wire diameter,span span,the damping coefficient,separate quantity,spacing and the tension on the influence law of large span transmission wire.(2)Based on energy balance principle,the large span wire wind vibration scheme aided design technology,selecting AACSR/EST-410/150 wire as the research object,this paper analyzes the types of wires from the damping test results,obtained the corresponding power characteristic curve,according to the matched with wire vibration damping line of the hammer,the dynamic characteristic test results,has been clear about the vibration parameter and energy consumption level of each element analysis has been considering wind speed probability distribution of vibration hammer,the optimal installation position and the number of the installation of vibration hammer and damper installation method.(3)Carried out according to the China electricity academy two preliminary simulation test result of vibration control scheme,the two kinds of scheme comparison and optimization,the vibration control scheme that could satisfy the requirement of engineering technology,considering the large split across the wire vibration control scheme of each wire in exactly the same,in order to closer to the real situation,further analyzes the optimal vibration control scheme is installed on the split conductor review test results,the analysis shows that the optimization scheme of large span wire wind vibration effect is good.can effectively reduce the large span transmission line prototype vibration test times,improve the anti-vibration design quality and efficiency.