Research and Analysis on the Dynamic Response of Power Devices After Automatic De-icing of Distribution Network Transmission Lines
As a critical connecting component between the tower and the distribution network transmission lines,power devices play a significant role in ensuring the safe operation of transmission lines.Therefore,this paper takes the 500 kV transmission line as the research object to study the power devices in heavy icing areas.The experimental results show that the dynamic tension of line A3 reaches its minimum value of 63.22 kN under condition ④.In contrast,the dynamic tension of line A2 reaches its maximum value of 77.58 kN under condition ③.Under stable wind and ice-snow loads,the power device guy wires exhibit displacement in the X,Y,and Z directions and rotate around the Y-axis and Z-axis.In the X-Y plane,the displacement range of the suspension cable in the X-direction is-0.75 to 80.73 mm.In the Y-Z plane,the displacement range of the suspended insulator string in the Z-direction is-106.30 to 2.30 mm.Within the first 30 seconds after ice shedding,the dynamic tension fluctuations at the suspension points of each transmission line are significant and show a rapid decay trend.However,from 30 to 60 seconds,the fluctuations are much slower.
distribution network transmission linesautomatic de-icingpower devicesfinite element model
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万方数据
