Electromagnetic-Fluid-Thermal Field Analysis of Power Cable under Vertical Laying Mode

doi:10.3969/j.issn.1008-0198.2023.02.005

Abstract

Abstract: The temperature distribution is one of the key factors that determine the operation of the power cable, and it is mainly affected by the running current, the laying mode and the operating environment. In order to study the temperature distribution characteristics of cables under the vertical laying mode, the paper takes the cable shafts of high-rise buildings as the research object, and builds a simplified three-dimensional multi-physics simulation model of the cable shafts. The finite element method is used to calculate the fluid and temperature distribution inside the cable shafts, and the temperature variation trend is analyzed. Then, the influence of factors such as running current and fire blocking material on the temperature distribution of the cable is comparatively studied. The research results show that compared with the horizontal laying mode, the vertical laying of the cable is more susceptible to the influence of the air flow in-side the cable shaft, resulting in a large difference in the temperature distribution between different parts of the cable. At the same time, the increase of load current and the addition of fire blocking materials will cause the increase of cable temperature and the change of temperature distribution between different floors.

Key words: power cable, vertical laying mode, multi-physics simulation, finite element method, current carrying capacity, cable fire blocking

CLC Number:

TM756

QU Bo, YANG Juntao, LI Xin, XIANG Xingyao, SHU Shengwen. Electromagnetic-Fluid-Thermal Field Analysis of Power Cable under Vertical Laying Mode[J]. Hunan Electric Power, 2023, 43(2): 24-31.

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