并联电缆电流不平衡抑制方法研究

陈德志; CHEN Dezhi; 王远; WANG Yuan; 王思竣; WANG Sijun; 苏钟焕; SU Zhonghuan; 张世崇; ZHANG Shichong; 孙云; SUN Yun

doi:10.48014/csgr.20251126001

并联电缆电流不平衡抑制方法研究

Research on Suppression Methods for Current Imbalance in Parallel Cables

中国智能电网研究 2025年第2卷第4期页码[32-38] 下载全文[2.9MB]

摘要

单根高压电缆的输电能力已难以适应不断增长的负荷需求, 因此通常采用并联电缆方式来提升输送容量。然而并联电缆复杂的电磁耦合及阻抗不对称导致电流分配不均, 引发绝缘老化、热击穿等问题, 严重威胁并联的电缆输电系统安全。针对这一问题, 本文首先分析了两种影响并联电缆线路电流不平衡的原因, 主要是由于电缆阻抗值不同和电磁耦合导致并联电缆电流不平衡。基于此提出了一种磁解耦动态补偿方法, 该方法是为并联电缆线路加装磁屏蔽来抑制电磁耦合。最后通过有限元仿真验证磁解耦动态补偿方法对并联电缆输电线路电流不平衡具有快速响应和抑制作用。

Abstract

The transmission capacity of a single high-voltage cable can no longer meet the ever-increasing load demand, necessitating the use of parallel cables to enhance transmission capacity. However, the complex electromagnetic coupling and inherent impedance asymmetry among parallel cables result in uneven current distribution, leading to issues such as insulation aging and thermal breakdown, which severely compromise the safety of parallel cable transmission systems. To address this issue, this paper first analyzes two primary causes of current imbalance in parallel cable circuits: differing cable impedance values and electromagnetic coupling. Building upon this analysis, a magnetic decoupling dynamic compensation method is proposed. This method involves installing magnetic shielding around the parallel cables to suppress electromagnetic coupling. Finally, finite element simulation is employed to verify that the proposed magnetic decoupling dynamic compensation method exhibits both rapid response and an effective suppression effect on current imbalance in parallel cable transmission lines.

DOI

10.48014/csgr.20251126001

文章类型

研究性论文

收稿日期

2025-11-26

接收日期

2025-12-17

出版日期

2025-12-28

关键词

并联电缆, 电磁耦合, 磁解耦动态补偿, 有限元仿真

Keywords

Parallel cables, electromagnetic coupling, magnetic decoupling dynamic compensation, finite element simulation

作者

陈德志^1,*, 王远¹, 王思竣¹, 苏钟焕², 张世崇², 孙云²

Author

CHEN Dezhi^1,*, WANG Yuan¹, WANG Sijun¹, SU Zhonghuan², ZHANG Shichong², SUN Yun²

所在单位

1. 沈阳工业大学, 沈阳 110870
2. 特变电工衡阳变压器有限公司, 衡阳 421000

Company

1. Shenyang University of Technology, Shenyang 110870, China
2. Hengyang Transformer Co. , Ltd. , Hengyang 421000, China

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引用本文

陈德志,王远,王思竣,等,并联电缆电流不平衡抑制方法研究[J].中国智能电网研究,2025,2(4):32-38.

Citation

CHEN Dezhi, WANG Yuan, WANG Sijun, et al. Research on suppression methods for current imbalance in parallel cables[J]. Chinese Smart Grid Research, 2025, 2(4): 32-38.