Steady state modeling and loss suppression of urban transmission system based on improved multi conductor theory

DUAN Xiaoli; LIU Sanwei; YU Ting; FAN Xiangyu; SUN Ding; LI Huaqiang

doi:10.11930/j.issn.1004-9649.202509059

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Steady state modeling and loss suppression of urban transmission system based on improved multi conductor theory

更新时间：2026-03-17

- Steady state modeling and loss suppression of urban transmission system based on improved multi conductor theory
- Vol. 59, Issue 3, Pages: 134-141(2026)
- 作者机构：
  
  1. 国网湖南省电力有限公司电力科学研究院,长沙,410007
  2. 西安交通大学,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.11930/j.issn.1004-9649.202509059
  CLC：
- Online First：16 March 2026，
  
  Published：16 March 2026
- 稿件说明：
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段肖力, 刘三伟, 喻婷, 范翔宇, 孙丁, 李华强. 基于改进多导体理论的城市输电系统稳态建模与损耗抑制[J]. 中国电力, 2026, 59(3): 134-141.

DUAN Xiaoli, LIU Sanwei, YU Ting, et al. Steady state modeling and loss suppression of urban transmission system based on improved multi conductor theory[J]. 2026, 59(3): 134-141.
段肖力, 刘三伟, 喻婷, 范翔宇, 孙丁, 李华强. 基于改进多导体理论的城市输电系统稳态建模与损耗抑制[J]. 中国电力, 2026, 59(3): 134-141. DOI： 10.11930/j.issn.1004-9649.202509059.

DUAN Xiaoli, LIU Sanwei, YU Ting, et al. Steady state modeling and loss suppression of urban transmission system based on improved multi conductor theory[J]. 2026, 59(3): 134-141. DOI： 10.11930/j.issn.1004-9649.202509059.

摘要

针对城市地下输电系统运行中普遍存在的接地损耗偏高与护套电流风险问题，提出了一种改进多导体建模方法与智能阻抗补偿策略。在建模方面，将输电线路离散为微元段，基于传输线电报方程构建节点导纳矩阵，并引入含接地节点的矩阵级联算法，解决了传统传播矩阵在特征值重复场景下对角化失效的问题，实现了全系统电压与电流分布的高精度求解。仿真结果表明，所提方法能够将护套感应电压与循环电流的计算误差控制在1%以内，为输电系统运维中的实时优化与智能调控提供了技术支撑。

Abstract

Aiming at the problems of high grounding loss and sheath current risk in urban underground power transmission system

an improved multi-conductor modeling and intelligent impedance compensation strategy are proposed. In the modeling aspect

the transmission line is discretized into micro-element segments

and the node admittance matrix is constructed based on telegrapher's equation

and the matrix-level cascade algorithm with grounding nodes is introduced to solve the problem of diagonalization failure of the conventional propagation matrix in the of repeated eigenvalues

and the high-precision solution of the voltage and current distribution in the whole system is realized. The simulation results show that the proposed method can control the calculation error sheath induced voltage and circulating current within 1%

and provide technical support for real-time optimization and intelligent control in the operation and maintenance of power transmission system.

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references

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