复杂敷设输电电缆线路载流量瓶颈的时空特性  

Time-Space Characteristics of Current-Carrying Capacity Bottleneck of Complicatedly Laid Transmission Cable Line

作　　者：牛海清[1] 郭少锋 余佳[1] NIU Haiqing;GUO Shaofeng;YU Jia(School of Electric Power,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]华南理工大学电力学院,广州510641

出　　处：《南方电网技术》2018年第5期44-50,共7页Southern Power System Technology

基　　金：国家高技术研究发展计划(863计划)(2015AA050201)~~

摘　　要：沿途敷设方式、土壤环境等的不同导致电缆线路存在载流量瓶颈,整条电缆线路的负载能力由其瓶颈段决定。在电缆导体温度评估的基础上,提出了电缆线路载流量瓶颈的识别方法。针对广州220 k V麒天甲乙线的实际情况,识别了典型场景下的载流量瓶颈,分析了载流量瓶颈的时空特性,评估了该线路的负载能力。研究结果表明,在持续负荷作用下,电缆线路的载流量瓶颈段与负荷的轻重、季节等有关;在应急负荷作用下,电缆线路的载流量瓶颈段与初始负荷电流大小、应急时间、应急电流大小等有关。研究成果可为复杂敷设电缆线路的负荷调度提供技术支持,提高负荷高峰期电缆运行的安全性。The differences of laying way and soil environment along the way result in the current-carrying bottleneck of cable line,w hich determines the load capacity of the total cable line. A method for identifying the bottleneck of cable line is proposed based on the evaluation of cable conductor temperature. In view of the actual situation of 220 kV Qilin-Tianhe Line Ⅰ ＆Ⅱ of Guangzhou,the current-carrying capacity bottleneck is identified in typical scenes,and the time-space characteristics of current-carrying capacity bottleneck are analyzed,the load capicity of the line is evaluated. The results show that the capacity bottleneck of line is related to the magnitude of load and season at continuous load,and the capacity bottleneck of line is related to the magnitude of initial load current,the length of the emergency time,the magnitude of emergency current at emergency load. The research results can provide technical support for load dispatching of complicatedly laid transmission cable line,and improve the safety of cable operation at peak load.

关 键 词：单芯电缆 导体温度 载流量瓶颈 时空特性 

分 类 号：TM751[电气工程—电力系统及自动化]