高压单芯电缆不等长交叉互联接地环流分析  

Analysis of Grounding Circulating Current for High-voltage Single-core Cables in Unequal-length Cross-bonding Connection

作　　者：王爱华[1] 张勇[1] 刘云杰 田连博 芦灯[1] WANG Aihua;ZHANG Yong;LIU Yunjie;TIAN Lianbo;LU Deng(Shandong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan 250013,China)

机构地区：[1]山东电力工程咨询院有限公司,山东济南250013

出　　处：《山东电力高等专科学校学报》2022年第1期1-4,共4页Journal of Shandong Electric Power College

摘　　要：研究单芯电缆金属护套在交叉互联接地情况下的等值电路,建立金属护套交叉互联数学模型,编写Matlab程序,计算交叉互联单元内电缆布置方式和段长不一致时的金属护套环流,并对段长与金属护套环流大小的关系进行了分析。为减少金属护套环流,高压单芯电缆在满足电缆载流量的前提下,应尽可能采用正三角形布置方式且段长尽量相等。The equivalent circuit of single-core cable metal sheath in cross-bonding grounding is researched,the mathematical model of cross-bonding metal sheath is established,and a Matlab program is coded.The circulating current in the sheaths is calcu⁃lated for the cable connection with different arrangements and lengths in the cross-bonding grounding unit,and the relationship between the length and circulating current in the sheaths is analyzed.In order to reduce the circulating current in the sheaths,the high-voltage single-core cable should take equilateral triangle arrangement with the same cable length under the right ampacity of power cable.

关 键 词：电力电缆 护套环流 交叉互联 布置方式 

分 类 号：TM753[电气工程—电力系统及自动化]