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ORIGINAL RESEARCH article
Front. Phys.
Sec. Interdisciplinary Physics
Volume 13 - 2025 | doi: 10.3389/fphy.2025.1584225
This article is part of the Research Topic Gas Discharge and Dielectrics Insulation View all articles
Investigation on Temperature Characteristics of High Voltage Cable Joints
Provisionally accepted- State Grid Jiangsu Electric Power Co., Ltd. Yangzhou Power Supply Bureau, Yangzhou, China
Explosion-proof shells are required to install high-voltage cable joints in tunnels, but if the internal filling and external air cooling systems are not reasonable, the heat of the joints cannot be dissipated promptly. Therefore, studying the heat dissipation characteristics and air cooling strategy of explosion-proof shell joints under tunnel laying is crucial for improving current carrying capacity and reducing safety hazards. This article establishes a fidelity model of 220kV high-voltage cable joints and investigates the effects of different fillers and filling ratios in explosion-proof shells on the heat dissipation characteristics of the joints; A model of external air cooling for joints under tunnel laying conditions was established, and the improvement of joint heat dissipation performance by different air cooling methods was analyzed. The results show that filling the explosion-proof shell with epoxy resin can increase the joint current carrying capacity by 1.78 times compared to air. As the proportion of air increases, the joint temperature linearly increases; The best heat dissipation effect is achieved when the wind direction in the tunnel is perpendicular to the axis of the cable joint, and the current carrying capacity can be increased by 1.38 times when the wind speed is 2m/s. The research content of this article has theoretical reference value for improving the current carrying capacity of high-voltage cable joints and reducing the main insulation temperature rise of joints.
Keywords: High voltage cables, Cable connectors, Explosion proof shell, Tempe rature distribution, current carrying capacity
Received: 27 Feb 2025; Accepted: 26 Mar 2025.
Copyright: © 2025 XU, ZHOU, ZHU and TENG. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
YONG XU, State Grid Jiangsu Electric Power Co., Ltd. Yangzhou Power Supply Bureau, Yangzhou, China
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