输电线路导线覆冰模拟计算与试验研究

发布时间：2018-04-01 21:10

本文选题：输电线路　切入点：导线　出处：《中国电机工程学报》2014年S1期

【摘要】：输电线路覆冰后,将引发断线倒塔事故,严重威胁电网的安全运行。其覆冰受气温、风速、水滴直径和导线结构的影响,为研究这些因素影响导线覆冰的规律,在导线覆冰理论计算研究的基础上,利用有限元软件二次开发功能,编制了导线覆冰过程中过冷却水滴碰撞导线的数值模型,该模型将反馈的两随机水滴位置插值到网格节点上,最终获得过冷却水滴局部碰撞位置,实现对导线覆冰过程的模拟。通过对不同覆冰影响因素的计算,总结了覆冰强度、局部碰撞率与气温、风速、水滴直径之间的相互关系。最后进行了导线覆冰模拟试验,试验结果与数值计算结果吻合较好,表明模型正确有效,可用于导线覆冰的预测。
[Abstract]:After the transmission line is covered with ice, it will lead to the breakdown tower accident, which will seriously threaten the safe operation of the power grid. Its icing is affected by the temperature, wind speed, water droplet diameter and wire structure. In order to study these factors affecting the rule of conductor icing, On the basis of theoretical calculation of conductor icing, the numerical model of supercooling water droplet collision wire during the course of conductor icing is developed by using the secondary development function of finite element software. The model interpolates the feedback two random droplet positions to the grid node and finally obtains the local collision position of the supercooled water droplets, which can simulate the ice process of the conductor. The ice intensity is summarized by calculating the factors affecting the ice coating. The relationship between local collision rate and air temperature, wind speed and water droplet diameter. Finally, the simulation experiment of conductor icing is carried out. The experimental results are in good agreement with the numerical results. It shows that the model is correct and effective, and can be used to predict the ice coating of conductors.
【作者单位】：中国电力科学研究院;北京航空航天大学航空科学与工程学院;
【基金】：国家电网公司科技项目(GC1317201200170)~~
【分类号】：TM752

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