摘要
单芯海缆在生产、施工方面相对于三芯海缆更具优势,但是其接地环流异常引起的海缆故障频繁发生。单芯海缆接地环流运行机理及检测策略有待深入研究。建立了基于阻抗矩阵的单芯海缆数学模型,揭示了铠装电阻率、铠装层相对磁导率、接地电阻、短路电阻等因素对阻抗矩阵内参数和接地环流的影响规律。结合实际工程案例分析了海缆接地环流分配不均的机理,为海缆的运行状态评估及检修提供了参考依据。
Single-core submarine cables have more advantages in production and construction compared to three-core submarine cables,but the submarine cable faults caused by abnormal grounding circulating current in single-core submarine cables occur frequently.The operation mechanism and detection strategy of grounding circulating current of single-core submarine cable need to be further studied.A mathematical model for single-core submarine cables is established based on the impedance matrix,and the influences of factors such as armor resistivity,armor magnetic permeability,grounding resistance,and short-circuit resistance on the parameters within the impedance matrix and grounding circulating current are revealed.Combined with the practical engineering cases,the mechanism of uneven distribution of grounding circulating currents in submarine cables is analyzed,which provides refer⁃ence bases for the evaluation of the operational status and maintenance of submarine cables.
作者
杨玉新
王劲松
朱永利
李岩
YANG Yuxin;WANG Jinsong;ZHU Yongli;LI Yan(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;North China Electric Power Test and Research Institute,China Datang Corporation Science and Technology General Research Institute Co.,Ltd.,Beijing 100040,China)
出处
《南方电网技术》
CSCD
北大核心
2024年第3期56-64,共9页
Southern Power System Technology
基金
中央高校基本科研业务费专项资金项目(2022MS068,20226932)
中国大唐集团有限公司2020年重大科技项目(DTST[2020]-GC-002)。
关键词
单芯海缆
接地环流
阻抗矩阵
PSCAD仿真
single-core submarine cable
grounding circulating current
impedance matrix
PSCAD simulation
