高压输电线路耦合共振除冰技术分析

高压输电线路除冰是电网安全运行的有力保障,为提高线路的除冰效率,提出一种耦合共振除冰方法。重点对覆冰导线做动力特性分析和实验测试,计算分析圆柱形、椭圆形和扇形雨凇导线的共振除冰频率,并考察覆冰区域应力分布,通过与实验结果比较发现,覆冰导线共振产生的应力大于覆冰破碎强度,论证了该方法的有效性和可行性,为输电线路耦合共振除冰提供参考依据。

Analysis on the De-icing Technology of Coupled Resonance for High Voltage Transmission Line

Development of de-icing technology for high voltage transmission line is a guarantee for the safe operation of power grid. In order to improve the de-icing efficiency of transmission lines, a local coupling resonance-based de-icing method is proposed in this paper. The focus of this study is put on the dynamic characteristics analysis of the iced wires and the experimental test. The resonance frequency of the cylindrical, oval and fan shaped glaze conductors are calculated, and the resonance-induced stress distribution in the iced area is investigated. A comparison with tested results shows that the resonance-induced stress of constraint section is greater than the crushing strength of ice, which validates the efficiency and feasibility of the method and can provide a theoretical basis for the de-icing technology of coupling resonance for transmission lines.