基于导线温度的架空线路弧垂新算法.docxVIP

第40卷第6期华北电力大学学报V01．40，No．62013年11月Journal of Noah China Electric Power UniversityNov．，2013doi：10．3969／j．ISSN．1007—2691．2013．06．05基于导线温度的架空线路弧垂新算法聂耸1，程养春1”，戴沅3(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)摘要：为保证输电线路增客运行的安全性，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。关键词：导线温度；孤垂；状态方程；钢芯铝绞线；动态增容中图分类号：TM751 文献标识码：A 文章编号：1007—2691(2013)06—0027—06A new sag calculation method based on the temperature ofoverhead transmission lineNIE Son91，CHENG Yang．chunl”，DAI Yuan3(1．State Key Laboratory of Alternate Electric Power System with Renewable Energy Sources，Noah China Electric Power University，Beijing 102206，China；2．Beijing Key Laboratory of High Voltage＆EMC，Noah China Electric Power University，Beijing 102206，China；3．Electric Power Research Institute of Guangdong Power Grid Corporation， Guangzhou 510080，China)Abstract：To ensure the security of transmission line capacity-increasing running，research of conductor temperature and sag relationship has a very realistic meaning．Some common methods，like state equation and strain—summation 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 temperature·sag new model addresses the issues raised．Experimental results show that，while the conductor temperature is high，new model continues to solve sag with steel-core 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 capacity-increasing．Key words：conductor temperature；sag；state equation；ACSR；dynamic capacity—