Simulation Analysis of Resonant Deicing of Overhead Ground Wire
Overhead ground wire icing is one of the common natural disasters that threatening the safety of the power grid.Verifying the feasibility of resonant deicing technology through the simulation analysis of overhead ground wire resonant deicing is of great significance for the design of resonant deicing scheme.The finite element model of the ice-covered ground wire system is established and the dynamic response of the single-file ice covered ground wire under harmonic excitation is analyzed by ANSYS Workbench.A form-finding method based on non-stress original length is proposed.The stress and arcs of ground wire and ice-covered ground wire under the action of gravity alone are calculated.The natural frequency and vibration mode of single file ice-covered ground wire are calculated,and the deicing effect of ice-covered ground wire with different vibration frequencies is simulated.The comparison shows that the best deicing effect can be achieved when the vibration with a frequency of 7.655 Hz is applied at 5m or 15m away from the suspension point,with an excitation force of only 1000 N.This study provides reference for the design of resonant deicing schemes and resonant deicing machines.
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