防火防爆装置对10 kV三芯电缆中间接头温升及载流量的影响  

Influence of fire-proof and explosion-proof devices on temperature rise and ampacity of 10 kV three-core cable middle joint

作　　者：陶贻青 舒胜文[1] 董懿飞 张梓奇 钱健 张明龙 TAO Yiqing;SHU Shengwen;DONG Yifei;ZHANG Ziqi;QIAN Jian;ZHANG Minglong(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou,Fujian 350108,China;Electric Power Research Institute,State Grid Fujian Electric Power Co.,Ltd.,Fuzhou,Fujian 350007,China)

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108 [2]国网福建省电力有限公司电力科学研究院,福建福州350007

出　　处：《福州大学学报（自然科学版）》2022年第5期642-649,共8页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省自然科学基金资助项目(2021J01635)。

摘　　要：为分析不同类型防火防爆装置对10 kV三芯电缆中间接头温升及载流量的影响,搭建大电流温升试验平台,开展无防火防爆装置,含不锈钢、铝镁合金和玻璃钢的防爆盒,以及含防爆毯、防火毯共6组温升试验.试验结果表明,在散热效果方面,防爆毯最好,不锈钢防爆盒最差;不同试验组在电缆中间接头径向和轴向表现出相似的温度分布规律.为便于工程应用的同时开展机理分析,基于温升试验数据,分别从解析法和数值法出发,计算不同试验组电缆的载流量.研究结果表明,含不锈钢防爆盒电缆载流量下降比例超过10%,含防爆毯电缆载流量下降比例仅为1%左右,其余下降比例约为10%.研究结果可为电缆中间接头防火防爆装置的选型设计提供参考.In order to analyze the influence of different types of fire-proof and explosion-proof devices on temperature rise and ampacity of the 10 kV three-core cable middle joint,a large current temperature rise test platform was built.And six groups of temperature rise tests were carried out,including no fire-proof and explosion-proof devices,explosion-proof boxes containing stainless steel,aluminum-magnesium alloy and FRP,and explosion-proof blankets and fire blankets.The test results show that the explosion-proof blanket is the best,and the stainless steel explosion-proof box is the worst.Different test groups show similar temperature distribution in radial and axial direction of cable middle joints.In order to facilitate engineering application and carry out mechanism analysis at the same time,based on temperature rise test data,the ampacity of different test groups was calculated by analytical method and numerical method respectively.The results show that the load rate of the cable containing stainless steel explosion-proof box decreases by more than 10%,the load rate of the cable containing explosion-proof blanket decreases by only about 1%,and the rest decreases by about 10%.The research results can provide reference for the selection and design of the cable joint fireproof and explosion-proof device.

关 键 词：电缆中间接头 防火防爆装置 温升 载流量 解析法 数值法 

分 类 号：TM89[电气工程—高电压与绝缘技术]