Study on Equivalent Viscous Damping of Aeolian Vibration for Transmission Line by AACSR-400 Steel Core Aluminum Alloy Wire

Abstract

To ensure its operational security, it is important to study the vibration state of transmission line. The equivalent viscous damping of aero-vibration for a large-span overhead conductor is obligated to be determined. In this paper, the damping characteristics of conductor by AACSR-400 steel core aluminum alloy wire are studied by use of energy balance principle. Based on the Diana wind energy curve and equivalent viscous damping, the relationship between frequency and damping ratio is conducted and discussed. Furthermore, a numerical simulation by ANSYS is performed to verify the validity of the equivalent damping coefficient and equivalent damping ratio with the same material parameters. Study shows that the result of finite element method by ANSYS is consistent well with that by energy balance principle.

Research on online monitoring and anti-dance technology of transmission line dance based on wide-area information transmission

“…The study of the vibration state of transmission lines can ensure the safety problem of transmission lines to a certain extent. Zhang, B. et al studied the damping characteristics of the conductor of AACSR-400 copper-core aluminum alloy transmission conductor based on the principle of conservation of energy, analyzed the relationship between the frequency of power transmission and damping, and simulated experiments on the transmission data by using ANSYS, and the study showed that the ANSYS finite element The analysis is consistent with the results of the principle of energy conservation [8]. Fan, W. et al believe that to ensure the safety of transmission lines in the extreme cold region transmission process, taking into account the existence of de-icing robots, to construct a dynamic movement model of multi-span transmission lines, combined with the de-icing robot's trajectory, to classify the icing conditions of the transmission lines in the extreme cold region, to avoid the de-icing robots to the transmission line of the damage [9].…”

A Comparative Analysis of the Economic Performance of New Energy-saving Wires Based on Life Cycle Cost

“…In recent years, research on the economic performance of conductors has primarily focused on traditional wire types, such as steel-reinforced aluminum alloy stranded wire conductors [3], steel core aluminum stranded wire [4], expanded-diameter conductors [5] and others. Research involving new wire types has focused primarily on transmission capacity [6], transmission line applications [7], conductor selection methods [8], optimization design of the conductor section selection [9] and other aspects.…”