500 kV充油海底电缆过负荷能力分析  

Analysis on overload capacity of 500 kV oil-filled submarine cable

作　　者：陈玉[1] 李涵之 姚凯 贾峰 黄小卫[2] CHEN Yu;LI Han-zhi;YAO Kai;JIA Feng;HUANG Xiao-wei(School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China;China Guangzhou Bureau, EHV Transmission Company of China Southern Power Grid Co., Ltd., Guangzhou 510405, China)

机构地区：[1]西安交通大学电气工程学院,陕西西安710049 [2]中国南方电网有限责任公司超高压输电公司广州局,广东广州510405

出　　处：《电工电能新技术》2021年第10期1-9,共9页Advanced Technology of Electrical Engineering and Energy

基　　金：南方电网技改项目(010100GS62200047)。

摘　　要：当海底电缆发生故障时,在进行运维检修前,往往需要在一定时间内进行过载。海底运行环境较为复杂,海底电缆在不同的敷设环境下,其过负荷能力也不相同,有必要对具体敷设环境下海底电缆过负荷能力进行具体分析。本文以海南联网系统500 kV充油海底电缆作为研究对象,构建了500 kV充油海底电缆暂态热路模型,实现了对不同敷设环境下的应急电流和应急时间计算与分析,给出了不同敷设环境下海底电缆过负荷能力的规律,进行了我国首次500 kV充油海底电缆加热实验,实验结果证明了本文建立的充油电缆过负荷分析模型及方法的有效性。本文给出的500 kV充油海底电缆的过负荷能力分析方法及结论,可为运行部门提供过负荷能力评估以及电力调度依据。When a submarine cable fails,it will often endure overload within a certain period of time before carrying out operation and maintenance.The submarine operating environment is relatively complicated,and the overload capacity of submarine cables under different laying environments is different.It is necessary to carry out a specific analysis on the overload capacity of submarine cables under specific laying environments.This paper takes the 500kV oil-filled submarine cable of the Hainan interconnection system as the research object,constructs a 500 kV oil-filled submarine cable transient thermal circuit model,realizes the calculation and analysis of emergency current and emergency time in different laying environments,and gives the law of overload capacity of submarine cable under different laying environments.Finally,the first heating experiment of 500 kV oil-filled submarine cable in China was carried out,the experimental results proved the validity of the oil-filled cable overload capacity analysis model and method established in this paper.The analysis methods and conclusions of the overload capacity of 500 kV oil-filled submarine cables given in this paper can provide the operation department with overload capacity evaluation and power dispatch basis.

关 键 词：充油海底电缆 暂态热路模型 敷设环境 过负荷能力 应急时间 应急电流 

分 类 号：TM247[一般工业技术—材料科学与工程]