对流散热对架空导线温度影响的实验研究  

Experimental Study on Impact of Heat Loss through Convection on Overhead Conductor

作　　者：张鸣[1] 阮班义[2] 杨敏[2] 刘刚[2] 刘志陆[2] 

机构地区：[1]广东电网公司佛山供电局,广东佛山528000 [2]华南理工大学电力学院,广东广州510640

出　　处：《广东电力》2013年第9期21-25,共5页Guangdong Electric Power

基　　金：国家重点基础研究发展计划资助项目(973计划)(2009CB724507);广东电网公司科技项目(K-GD2011-1430)

摘　　要：为了更准确地计算架空导线的运行电流,掌握高压架空线路的运行状态,有必要研究和分析不同环境条件下架空导线的对流散热的方法。为此建立架空导线对流散热的数学模型,并根据该模型建立架空导线三维有限元仿真模型,通过仿真计算分析导线与环境温差、风速、风向对架空导线温度的影响。仿真结果表明,风速对导线散热效果最明显,相同风速条件下风向为60°时效果最好,随着导线温度升高导线局部散热效果逐渐变好。最后,设计了架空导线加载恒定电流,垂直导线风速0.8 m/s的室内实验,实验结果与有限元仿真计算基本一致。For more correctly calculating operational current of overhead conductor and knowing well operational state of high voltage overhead conductor, it is necessary to study and analyze methods for heat loss through convection of the over-head conductor under different environmental conditions. Therefore, this paper introduces establishment of mathematical model for heat loss through convection and three-dimensional finite element simulation model for the overhead conductor. By simulating calculation, it analyzes impact of environment temperature, wind speed and wind direction on the overhead con-ductor. The simulation result shows that heat loss effect of wind speed is the most obvious, effect is the best when wind direc-tion is at 60° with the same wind speed condition while with rise of conductor temperature, partial heat loss effect of the conductor is gradually altering for the better. At last, it discusses design for loading constant current of the overhead conduc-tor and indoor experiment when wind speed of the vertical conductor is about 0.8 m/s. The experimental result is basically consistent with finite element simulating calculation.

关 键 词：对流散热 三维模型 有限元仿真 温差 风速 风向 

分 类 号：TM726.3[电气工程—电力系统及自动化]