高电压技术2017，Vol.43Issue(5)：1670-1676,7.DOI:10.13336/j.1003-6520.hve.20170428037
110kV电缆中间接头载流能力计算与实验分析
Current Capacity Calculation and Experimental Analysis of 110 kV Cable Joint
摘要
Abstract
To evaluate the current capacity of 110 kV cable joint,thermal-circuit method is used in analysis of radial conduction difference between cable and its matching joint,also the impact range of axial conduction.Based on theoretical analysis,1/2 axial plane geometry model with limited length is built,then current capacity of cable joint is obtained using iterative method in thermal simulation.High-current temperature-rise experiment is done under air-laying environment,and local temperature distribution law of cable joint is obtained.The results show:radial temperature difference of cable joint is higher relative to cable itself,accordingly,radial thermal resistance of cable joint is higher;the impact range of axial conduction is small,axial temperature distribution uniformity is observed in cable conductor close to cable joint;the temperature difference between cable and cable joint increase with the rise of current;under air-laying environment,ampacity of 110 kV cable line is reduced by 145 A in consideration of cable joint;the relative calculation error is less than 6％,when axial plane geometry model with limited length is used in thermal simulation of cable joint.The research results obtained can be used as reference to assess the restriction of cable joint to current capacity of 110 kV cable line.关键词
中间接头/110kV电缆线路/载流能力/热路法/温升实验/轴切面几何模型Key words
cable joint/110 kV cable line/current capacity/thermal-circuit method/temperature-rise experiment/axial plane geometry model引用本文复制引用
刘刚,王振华,徐涛,刘毅刚,王鹏宇..110kV电缆中间接头载流能力计算与实验分析[J].高电压技术,2017,43(5):1670-1676,7.基金项目
国家高技术研究发展计划(863计划)(2015AA050201).Project supported by National High-tech Research and Development Program of China (863 Program) (2015AA050201). （863计划）
