Parameter Optimization of Electric Pulse Deicer for Overhead Ground Wire Based on Finite Element Method

Abstract

Because it is difficult to implement short-circuit deicing, overhead ground wire deicing has always been a difficult problem in power grid ice prevention and disaster reduction. In this paper, the working principle of the overhead ground wire electric pulse deicing device is introduced. Then the electric pulse force calculation model of the overhead ground wire is established. The validity of the model is verified by comparing the model-calculated values of coil inductance and resistance with the experimentally measured values. The effect of coil turns, multiplier thickness, and the side length of the multiplier on the pulse force peak and impulse are analyzed. Finally, the electric pulse deicing test of the short-size ground wire is carried out in the artificial climate chamber. The results show that with the increase in the number of turns of the coil, the peak value of the pulse force decreases gradually, the impulse increases gradually, but the growth rate slows down. With the increase of the thickness of the multiplier, the peak value and impulse of the pulse force increase almost unchanged near the skin depth. With the increase of the side length of the multiplier, the peak value and impulse of the pulse force gradually increase until the area of the multiplier is close to the area of the coil. The electric pulse deicing test shows that the deicing length increases with the increase of the number of coil turns, and the deicing efficiency of the 60-turn coil deicing device is 90%.