Research on Wind-induced Displacement Response of Overhead Transmission Lines Based on Nonlinear Structural Analysis
The stability and reliability of high voltage transmission line are important factor affecting the safe and stable operation of power grid.Therefore,the study on wind-induced response of transmission tower line system has been a hot research topic in the field of transmission engineering technology.Taking 220 kV transmission line as an example,we carried out the numerical simulation of pulsating wind field,analyzed the vibration form of tower line system,and fo-cused on the vibration form of wire under wind load,as well as the displacement change caused by the vibration of wire under different working conditions.In addition,we deeply analyzed the transient dynamic response of the transmission line,including the modal analysis of the overhead transmission line,the vibration process under wind load and the dis-placement change of the tower line under different working conditions.The results show that the vibration of the tower and the wire is mainly the first and second mode low frequency vibration.What's more,the vibration mode of the wire mainly affects the vibration of the tower and wire system,and the maximum value of the vibration displacement at dif-ferent times has a more serious impact on the safe operation of the system.The results of the research and analysis have guiding significance for the safe and stable operation of transmission lines.
transmission tower line systemwind-induced responsefinite element methodnonlinear structural analysis
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