Study of New Vibration Suppression Devices for Application to EHV Transmission Line Groundwires

Aeolian vibration of overhead groundwires is intense in transmission lines located in flat and windy areas; this easily leads to line failure as a result of material fatigue. To suppress the aeolian vibration of lines located in the Hexi corridor, new dampers and damping wires for groundwires were developed and configured, based upon analysis of the characteristics of aeolian vibration. Simulation tests were conducted according to the energy balance principle (EBP), and field vibration tests were also performed. The test results showed that the dampers meet the requirements of the prescribed standard. The efficiency of the vibration suppression of these new devices was verified, and the devices were successfully applied to 750 kV transmission lines. These new types of vibration suppression devices offer easy installation, slip resistance, and a satisfactory vibration suppression effect, so they can be widely used in future transmission line projects.