基于流-固耦合分析的架空输电线路流场和温度场的数值研究  

Numerical Study on Flow Field and Temperature Field of Overhead High Voltage Line Based on Fluid-Solid Coupling Analysis

作　　者：郭振强 朱超 王永庆 赵隆[3] 王磊 刘亚柳 张勇[2] GUO Zhen-qiang;ZHU Chao;WANG Yong-qing;ZHAO Long;WANG Lei;LIU Ya-liu;ZHANG Yong(State Grid Shaanxi Electric Power Research Institute,Xi'an 710021,China;School of Mechanical and Electrical Engineering,Shaanxi University of Science&Technology,Xi'an 710021,China;School of Electronic Information,Xi'an Engineering University,Xi'an 710021,China;State Grid Shaanxi Xi'an New Area Power Supply Company,Xi'an 710021,China)

机构地区：[1]国网陕西省电力公司电力科学研究院,西安710021 [2]陕西科技大学电机工程学院,西安710021 [3]西安工程大学电子信息学院,西安710021 [4]国网陕西西咸新区供电公司,西安710021

出　　处：《电力学报》2020年第4期302-312,共11页Journal of Electric Power

基　　金：国网陕西省电力公司资助项目(2126KY19006K)。

摘　　要：为了得到架空输电线路的流场和温度场分布,以LJG240/40型钢芯铝绞线为例,建立了架空线路流-固耦合模型,通过分析导线周围流场与温度场的关系,得到了流场-温度场-弧垂相结合的架空线路最大实时允许载流量的计算方法。仿真结果表明,导线周围流场变化对温度场造成的影响不容忽视。导线弧垂随着载流量的增大而增大。导线周围流场对其弧垂造成很大的影响,流场风速在一定范围内越大,导线弧垂越小。In order to obtain the flow field and temperature field distribution of overhead high voltage lines,taking LJG240/40 ACSR as an example,a more realistic model of overhead high-voltage lines Fluid-Solid coupling is established.By analyzing the relationship between the flow field and the temperature field around the wire,a method for calculating the maximum real-time allowable current-carrying capacity of overhead high-voltage lines based on the combination of flow field-temperature field-sag is formed.The simulation results show that the influence of the change of the flow field around the wire on the temperature field cannot be ignored.Based on the investigation of temperature field and flow field,it is found that the sag of the wire increases with the increase of current-carrying capacity.The flow field around the wire has a great influence on its sag:the larger the wind speed of the flow field in a certain range,the smaller the sag of the wire.

关 键 词：架空线路 流固耦合 温度场 流场 弧垂 

分 类 号：TM751[电气工程—电力系统及自动化]