输电线路垂直双分裂导线粘连分析

Analysis of adhesion characteristics of vertically arranged double-split conductors

垂直双分裂导线粘连故障多发,研究垂直双分裂导线粘连具有现实意义。以实际运行的220 kV线路故障为例,基于导线状态方程和电磁力计算,建立双分裂导线粘连模型,研究导线温度、风速、直流电阻误差、张力等因素对导线粘连的影响。研究表明子导线粘连的临界电流随导线温度的增大而增大,随张力、子导线电阻误差、风速的增大而减小。考虑电阻、风速交互作用时,当电阻误差值最大风速最小时临界电流最小。研究结果可为线路设计和改造提供有益参考。

Given the frequent adhesion of vertically arranged double-split conductors,the research on adhesion is of practical significance.The fault of 220 kV lines is taken as an example to establish an adhesion model of the doublesplit model based on the conductor state equation and electromagnetic force calculation to study the impact of wire temperature,wind speed,DC resistance error,tension,and other factors on conductor adhesion.The study shows that the critical current of the conductor adhesion increases as the conductor temperature rises and decreases with the increase of the tension,sub-conductor resistance error,and wind speed.Under the interaction of resistance and wind speed,the critical current reaches its minimum in the case of the maximum resistance error value and the minimum wind speed.The research results can provide a useful reference for line design and modification.