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Energies
Volume 19
Issue 10
10.3390/en19102320
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Research on an Improved Evaluation Method and Improvement Strategy for the Transportation Capacity of Submarine Cable in a Directional Drilling Section

by
Kun Huang
1,
Hanbo Dan
1,
Yuze Lei
2,
Fei Teng
1,
Junyao Le
1,
Yantao Chen
3,
Ziheng Gao
3,
Honglei Deng
3 and
Gang Liu
3,*
1
China Energy Engineering Group Zhejiang Electric Power Design Institute Co., Ltd., Hangzhou 310012, China
2
Central Southern China Electric Power Design Institute Co., Ltd. of China Power Engineering Consulting Group, Wuhan 430071, China
3
School of Electric Power Engineering, South China University of Technology, Guangzhou 510641, China
*
Author to whom correspondence should be addressed.
Energies 2026, 19(10), 2320; https://doi.org/10.3390/en19102320
Submission received: 12 March 2026 / Revised: 29 April 2026 / Accepted: 6 May 2026 / Published: 12 May 2026
(This article belongs to the Section F: Electrical Engineering)
Versions Notes

Abstract

The submarine cable installed in the directional drilling pipeline may face constrained ampacity due to the narrow air gap and complex thermal environment. The current studies have overlooked the axial heat transfer caused by variable burial depth and the influence of deep ground temperature, resulting in inaccurate assessment of the hot spot temperature and hot spot location of submarine cable in the directional drilling pipeline. To address this issue, the distributed parameter electrical circuit model for long-distance submarine cable and the three-dimensional thermal simulation model for the submarine cable landing section were developed to analyze the heat generation and dissipation characteristics of submarine cable in the directional drilling pipeline. Then, the hot spot location of submarine cable in the directional drilling pipeline was identified. Subsequently, an improved thermal rating method based on the quasi-three-dimensional thermal model was proposed to rapidly assess the hot spot temperature for the submarine cable in the directional drilling pipeline. The accuracy of the improved thermal rating method was verified by comparison with the simulation method. Finally, implementation of water circulation was conducted to resolve the overheating issue in the directional drilling pipeline. The investigations in this paper can provide support for the efficient utilization of submarine cable. The improved evaluation method for submarine cable in a directional drilling section proposed in this paper can be regarded as the supplement to the traditional IEC method.
Keywords: submarine cable; directional drilling pipeline; hot spot location; improved thermal rating method; water circulation system submarine cable; directional drilling pipeline; hot spot location; improved thermal rating method; water circulation system

Share and Cite

MDPI and ACS Style

Huang, K.; Dan, H.; Lei, Y.; Teng, F.; Le, J.; Chen, Y.; Gao, Z.; Deng, H.; Liu, G. Research on an Improved Evaluation Method and Improvement Strategy for the Transportation Capacity of Submarine Cable in a Directional Drilling Section. Energies 2026, 19, 2320. https://doi.org/10.3390/en19102320

AMA Style

Huang K, Dan H, Lei Y, Teng F, Le J, Chen Y, Gao Z, Deng H, Liu G. Research on an Improved Evaluation Method and Improvement Strategy for the Transportation Capacity of Submarine Cable in a Directional Drilling Section. Energies. 2026; 19(10):2320. https://doi.org/10.3390/en19102320

Chicago/Turabian Style

Huang, Kun, Hanbo Dan, Yuze Lei, Fei Teng, Junyao Le, Yantao Chen, Ziheng Gao, Honglei Deng, and Gang Liu. 2026. "Research on an Improved Evaluation Method and Improvement Strategy for the Transportation Capacity of Submarine Cable in a Directional Drilling Section" Energies 19, no. 10: 2320. https://doi.org/10.3390/en19102320

APA Style

Huang, K., Dan, H., Lei, Y., Teng, F., Le, J., Chen, Y., Gao, Z., Deng, H., & Liu, G. (2026). Research on an Improved Evaluation Method and Improvement Strategy for the Transportation Capacity of Submarine Cable in a Directional Drilling Section. Energies, 19(10), 2320. https://doi.org/10.3390/en19102320

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