基于导线温度的架空线路弧垂新算法  

A new sag calculation method based on the temperature of overhead transmission line

作　　者：聂耸[1] 程养春[1,2] 戴沅[3] 

机构地区：[1]华北电力大学高电压与电磁兼容北京市重点实验室,北京102206 [2]华北电力大学新能源电力系统国家重点实验室,北京102206 [3]广东电网公司电力科学研究院,广东广州510080

出　　处：《华北电力大学学报（自然科学版）》2013年第6期27-32,共6页Journal of North China Electric Power University：Natural Science Edition

基　　金：广东电网公司重点科技资助项目(K-GD2011-431)

摘　　要：为保证输电线路增容运行的安全性,研究导线温度与弧垂的关系有很现实的意义。常用的状态方程法和应力积累法只适用于较低的导线温度范围,一旦导线温度过高,铝股发生径向膨胀,弧垂的计算结果将会出现很大误差。输电线路导线温度——弧垂新模型的提出解决了上述问题,当导线温度逐渐升高,铝股受力由拉力变为压力时,将利用纯钢特性继续求解弧垂。实验结果表明,该算法使得计算的弧垂误差均小于其他两种方法,新模型的应用将为输电线路增容安全运行提供保障。To ensure the security of transmission line capacityincreasing running, research of conductor temperature and sag relationship has a very realistic meaning. Some common methods, like state equation and strainsummation method, are only suitable for conductor with a lower temperature range. Once the conductor temperature is too high, a luminum strands have mutant mechanical characteristics because of radial expansion, which will cause sag calculation results error. Transmission line conductor temperaturesag new model addresses the issues raised. Experimental results show that, while the conductor temperature is high, new model continues to solve sag with steelcore characteristics, the error of sag calculation is less than the other two methods ; application of the new model will help ensure safe opera tion of transmission line capacityincreasing.

关 键 词：导线温度 弧垂 状态方程 钢芯铝绞线 动态增容 

分 类 号：TM751[电气工程—电力系统及自动化]