陆海段不等径海缆匹配方案与载流能力提升研究  

Research on improvement of current carrying capacity of submarine cable based on unequal diameter matching of land and sea sections

作　　者：孙璐 乐彦杰 阮天余 张磊 刘宗喜 SUN Lu;LE Yanjie;RUAN Tianyu;ZHANG Lei;LIU Zongxi(State Grid Zhoushan Power Supply Company,Zhoushan Zhejiang 316021,China;Zhejiang Zhoushan Marine Power Research Institute Co.,Ltd.,Zhoushan Zhejiang 316021,China;China Electric Power Research Institute Co.,Ltd.,Wuhan 430074,China)

机构地区：[1]国网浙江省电力有限公司舟山供电公司,浙江舟山316021 [2]浙江舟山海洋输电研究院有限公司,浙江舟山316021 [3]中国电力科学研究院有限公司,武汉430074

出　　处：《浙江电力》2022年第8期80-86,共7页Zhejiang Electric Power

基　　金：国网浙江省电力有限公司科技项目(2021ZK40)。

摘　　要：提升海底电缆(简称“海缆”)登陆段载流量的常规方法会增加海缆制造成本和运维投入。为此,通过引入不等径电缆接头技术,校核分析了220 kV海缆登陆段与海中段的实际载流能力,提出差异化的不等径海缆登陆段与海中段导体截面匹配原则,评价了不等径海缆匹配方案的经济性。研究结果表明:海缆导体截面越大,登陆段载流能力下降越大;不等径匹配方法中单芯或铜丝铠装的海中段海缆所需导体截面较小;海缆线路全部为单芯铜丝铠装时可获得最大的输送能力,全部为单芯钢丝铠装时可兼顾海缆线路较大输送容量和最优单位容量成本。The conventional method of increasing the current carrying capacity of the submarine cable landing section increases the manufacturing cost of the submarine cable and the long-term operational reliability.This paper introduces the unequal diameter cable joint technology and checks and analyzes the actual current-carrying capacity of the 220 kV submarine cable landing section and the submarine section.Also,it proposes a differentiated unequal diameter submarine cable landing section and submarine section conductor cross-section matching principle and evaluates the economic efficiency of the unequal diameter cable matching scheme.The research results show that the larger the conductor cross-section of the submarine cable,the greater the drop in current-carrying capacity during the landing section.In the unequal diameter matching method,the single-core or copper wire armored submarine cable requires a smaller conductor cross-section.The maximum transmission capacity can be obtained when the submarine cable line is all single-core copper wire armored.When it is all single-core steel wire armor,it can take account of the larger transmission capacity of the submarine cable line and the optimal unit capacity cost.

关 键 词：海底电缆 不等径 载流量 截面匹配 经济性 

分 类 号：TM757.4[电气工程—电力系统及自动化]