Optimization Design and Research on Bending Resistance of Vibration Dampers for Overhead Transmission Lines

This paper focuses on the plastic bending deformation of ground wire and optical cable vibration dampers in the operation of 500 kV AC overhead transmission lines in the western Inner Mongolia region, conducting cause analysis and research on the optimization of the bending resistance of vibration dampers. First, the bending data of ground wire and optical cable vibration dampers were classified and summarized. Then, an analysis of the terrain, landform and other factors of the line route was carried out. Combined with the results of the vibration fatigue test and ice-shedding jump simulation test of vibration dampers, the main causes of plastic bending of vibration dampers were inferred. To enhance the ability of the vibration damper’s steel strand to resist external impact deformation, three structural optimization design schemes for vibration dampers were proposed by shortening the length of the steel strand and increasing the diameter of the steel strand. Subsequently, ice-shedding jump simulation tests and vibration damper power characteristic tests were conducted. Based on the test results, the optimal structural optimization design scheme for vibration dampers was put forward. The research results can provide a reference for the anti-vibration design of overhead transmission lines.