Study on Calculation Method for Steady-state Temperature Rise of Tunnel Cables Based on Similarity Principle

FU Chenzhao; SI Wenrong; ZHAO Yingying; LIANG Yongchun

doi:10.13296/j.1001-1609.hva.2026.09.022

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Study on Calculation Method for Steady-state Temperature Rise of Tunnel Cables Based on Similarity Principle

Simulation and Analysis of Thermal and Electromagnetic Characteristics of Power Equipment | 更新时间：2026-09-10

- Study on Calculation Method for Steady-state Temperature Rise of Tunnel Cables Based on Similarity Principle
- High Voltage Apparatus Vol. 62, Issue 9, Pages: 221-227(2026)
- 作者机构：
  
  国网上海市电力公司电力科学研究院，上海 200437
  河北科技大学，石家庄 050018
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.09.022
  CLC：
- Received：08 April 2026，
  
  Revised：2026-06-09，
  
  Published：16 September 2026
- 稿件说明：
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FU Chenzhao, SI Wenrong, ZHAO Yingying, et al. Study on Calculation Method for Steady-state Temperature Rise of Tunnel Cables Based on Similarity Principle[J]. High Voltage Apparatus, 2026, 62(9): 221-227.
DOI：

FU Chenzhao, SI Wenrong, ZHAO Yingying, et al. Study on Calculation Method for Steady-state Temperature Rise of Tunnel Cables Based on Similarity Principle[J]. High Voltage Apparatus, 2026, 62(9): 221-227. DOI： 10.13296/j.1001-1609.hva.2026.09.022.

摘要

文中提出了一种基于相似原理求解电缆温升的计算方法。利用相似性与气体辐射特性等传热学知识，将隧道电缆温升计算涉及的对流与辐射相对分离。通过比例缩放，实现利用小尺寸模型下的对流特性反映大尺寸模型的对流传热特性，结合辐射散热系数求解，联立建立表示隧道电缆组温升特性的隐函数方程组，将场域的仿真计算转化为方程组的求解，从而在较少计算资源下进行电缆温升的快速计算。算例验证表明，该方法可信，误差可控，极大提高计算准确性与效率。

Abstract

In this paper a calculation method for determining calble temperature rise based on the similarity principle is presented. By leveraging heat transfer principles such as similarity theory and gas radiation charcateristics

the convective and radiative componsnes involved in the calculation of tunnel calbe temperature rise are relatively decoupled from each other. Through proportional scaling

the convective heat transfer characteristics of the fullscale model are represented by those obtained from a small-scale model. Combined with the determination of the radiative heat tranfer coefficient

a system of implict equations characterizing the temperature rise behavior of the tunnel cable group is established. By transforming the field simulation into the solution of this equation system

rapid cable temperature rise calculation is achieved with relatively low computional resources. Validation through case studies demonstrates that the proposed method is reliable with controllable errors

significantly improving both computional accuracy and efficiency.

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