Simulation and Calculation of Temperature Field and Current-Carrying Capacity of Power Cables under Different Laying Methods

Yongjie Nie, Daoyuan Chen, Shuai Zheng (), Xiaowei Xu, Xilian Wang and Zhensheng Wu
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Yongjie Nie: Electric Power Research Institute, Yunnan Power Grid Co., Ltd., Kunming 650217, China
Daoyuan Chen: Electric Power Research Institute, Yunnan Power Grid Co., Ltd., Kunming 650217, China
Shuai Zheng: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Xiaowei Xu: Electric Power Research Institute, Yunnan Power Grid Co., Ltd., Kunming 650217, China
Xilian Wang: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Zhensheng Wu: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China

Energies, 2024, vol. 17, issue 18, 1-17

Abstract: Precisely determining how cables distribute their current-carrying capacity and temperature field is crucial for the dependable and cost-effective functioning of power grids. Firstly, the power cable structure and the advantages and disadvantages of different laying methods are analyzed in detail. Secondly, the theoretical model of current-carrying capacity calculation and temperature field of power cables, including heat convection, heat conduction, and heat radiation, is constructed, and the method for calculating cable current-carrying capacity, relying on the double-point chordal interception method, is suggested. Then, the COMSOL multiphysics 6.2 finite element simulation software is utilized to create a simulation model that aligns with the real cable laying technique. Finally, the current-carrying capacity and temperature field of power cables are simulated and analyzed for different arrangements of power cables in three laying modes, namely directly buried, row pipe, and trench. The simulation results show that the cable laying method greatly affects the cable’s carrying capacity; the more centralized the cable distribution, the smaller the flow. The method can be realized in different ways of laying power cables in the real-time rapid calculation of flow as the actual laying of power cables has an important reference and reference significance.

Keywords: current-carrying capacity; temperature field; power cable; different laying methods; double-point chordal interception method (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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