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  4. Vol 9, Issue 1, 2026

Research on Ampacity and Influencing Factors of High-Voltage Submarine Cables in Deep-Sea Environments

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DOI: 10.23977/jeeem.2026.090110 | Downloads: 1 | Views: 21

Author(s)

Tingxi Zheng 1

Affiliation(s)

1 School of Advanced Manufacturing, Guangdong University of Technology, Jieyang, 11845, Guangdong, China

Corresponding Author

Tingxi Zheng

ABSTRACT

China has a mainland coastline of approximately 18,000 kilometers, with abundant offshore and deep-sea wind energy resources. The technically exploitable capacity reaches 2.78 billion kW. As the core channel for power transmission and grid integration of offshore wind power, the ampacity of submarine cables is a key parameter that characterizes transmission capacity and thermal safety. However, existing ampacity calculation methods still have deficiencies. The analytical methods based on IEC standards lack sufficient accuracy under complex environmental conditions. Moreover, most studies fail to comprehensively consider deep-sea environmental factors (such as seawater flow velocity, seabed temperature distribution, and soil thermal properties), resulting in deviations in ampacity assessment results.To address the above issues, this paper proposes a combined analytical and numerical simulation method for ampacity calculation. First, based on the IEC 60287 standard, an analytical model is established using MATLAB to calculate key parameters. Subsequently, a multi-physics field coupling model is constructed using COMSOL, which comprehensively considers seawater flow and environmental temperature distribution. The temperature field of the cable under deep-sea laying conditions is simulated and analyzed to achieve accurate ampacity evaluation. The results show that considering factors such as seawater flow velocity, soil temperature, and seawater temperature can significantly improve calculation accuracy. This method helps reduce design margins, lower engineering investment and operation & maintenance costs, and provides theoretical support for the safe operation of high-voltage submarine cables.

KEYWORDS

Submarine cable; deep-sea laying; temperature field; ampacity; seawater flow velocity

CITE THIS PAPER

Tingxi Zheng. Research on Ampacity and Influencing Factors of High-Voltage Submarine Cables in Deep-Sea Environments. Journal of Electrotechnology, Electrical Engineering and Management (2026). Vol. 9, No.1, 80-87. DOI: http://dx.doi.org/10.23977/jeeem.2026.090110.

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