首条国产公里级高温超导电缆输电特性分析  

Transmission Characteristics Analysis of First Domestic km-level HTS Cables

作　　者：马爱清 张杨欢 吕江平 汪恒 李红雷 MA Aiqing;ZHANG Yanghuan;LÜ Jiangping;WANG Heng;LI Honglei(College of Electrical Engineering,Shanghai University of Electric Power,Yangpu District,Shanghai 200090,China;Henan Electric Power Company DC Transportation Inspection Branch,Zhengzhou 450000,Henan Province,China;State Grid Electric Power Research Institute.SMEPC.Hongkou District,Shanghai 200437,China)

机构地区：[1]上海电力大学电气工程学院,上海市杨浦区200090 [2]国网河南电力公司直流运检分公司,河南省郑州市450000 [3]国网上海市电力公司电力科学研究院,上海市虹口区200437

出　　处：《电网技术》2022年第3期1206-1213,共8页Power System Technology

基　　金：上海市自然科学基金项目(19ZR1420600);上海绿色能源并网工程技术研究中心项目(13DZ2251900)。

摘　　要：针对大型城市用电需求不断增加导致的用电负荷密集与原有输电走廊狭小难扩展的矛盾,该文基于解析计算、数值计算和现场实测相结合的方法,以上海宝山城市工业园区启动的我国首条公里级高温超导电缆(35kV/2kA/1.15km)输电工程为计算对象,分析了超导电缆总体损耗及磁场特性,在线路回路数、输送容量、损耗、周围电磁环境影响方面与传统电缆及架空线路进行了深入比较。结果表明,超导电缆在解决电能大容量传输方面具有潜在的优势,输送容量120MVA分别需要超导电缆1回、常规电缆5回、架空线4回;在额定输送容量120MVA下,超导电缆总损耗分别为常规电缆、架空线的65.51%、28.92%;在传输电流2kA时的周围磁场分布,超导电缆、常规电缆、架空线外部最大磁场分别为0.25×10^(-3)、1.54、11.92mT。随着超导带材和制冷成本的降低,高温超导电缆具有广阔的实际应用前景。In those large cities, the increasing demand for electricity power results in the contradiction between the intensive power loads and the narrow and inexpansible transmission corridors. In order to solve theis problem, this paper combines the analytical calculation, the numerical calculation with the field measurement. Taking the first kilometer-level high temperature superconducting cable(HTS cable)(35 kV/2 kA/1.15 km) transmission project launched by Baoshan City Industrial Park in Shanghai as the calculation object, we analyze the overall loss and the magnetic field characteristics of the superconducting cables, and compare with the traditional power cables and the overhead lines in the number of circuits, the transmission capacities, the losses and the influences of the surrounding electromagnetic environment. The results show that the superconducting cable has the potential advantages in large capacity power transmission: The 120 MVA transmission capacity requires only one_circuit of superconducting cables, but five_circuits of conventional cables orfour_circuits of overhead lines;Under the rated transmission capacity of 120 MVA, the total loss of superconducting cable is 65.51% and 28.92% of those of conventional cables or overhead lines respectively;When the transmission current is 2 kA, the maximum external magnetic field of superconducting cables is 0.25×10^(-3) mT,but for conventional cables and overhead lines, those are 1.54 mT and 11.92 mT respcetively. With the decrease of superconducting tape and refrigeration cost, the high temperature superconducting cable will have a broader practical application prospect.

关 键 词：高温超导电缆 常规电缆 架空线 损耗 磁场特性 

分 类 号：TM721[电气工程—电力系统及自动化]