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In deep-sea cable laying projects, ocean current velocities and seawater thermal properties can affect the current-carrying capacity of submarine cables by altering seawater heat transfer efficiency. To address this issue, this study employs the finite element method to establish a three-dimensional electro-thermal-fluid coupled model of the submarine cable and its deployment environment. Based on actual deployment conditions and operational scenarios, an analytical-numerical coupled model is proposed. Analytical functions are used to dynamically adjust seawater thermal properties parameters, determine the range of ocean current velocities, and calculate and analyze the influence of seawater thermal properties parameters (such as thermal conductivity and specific heat capacity) and different velocities on the static current-carrying capacity of submarine cables. The research findings provide scientific basis for submarine cable selection in offshore wind power transmission projects, thereby enhancing the transmission efficiency and reliability of offshore wind power systems.

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Assessment of High-Voltage Direct Current Submarine Cable Current Carrying Capacity Considering the Multi-Factor Influence of Ocean Currents and Seawater Thermal Properties

  • 会议论文

  • 发表日期：

    2026年

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  • Lv Cui,
  • Honglei Li,
  • Xingxing Zhou,
  • Zhe Chen,
  • Aiqing Ma,
  • Xinyu Wu,
  • Huangxiang Su

摘要

In deep-sea cable laying projects, ocean current velocities and seawater thermal properties can affect the current-carrying capacity of submarine cables by altering seawater heat transfer efficiency. To address this issue, this study employs the finite element method to establish a three-dimensional electro-thermal-fluid coupled model of the submarine cable and its deployment environment. Based on actual deployment conditions and operational scenarios, an analytical-numerical coupled model is proposed. Analytical functions are used to dynamically adjust seawater thermal properties parameters, determine the range of ocean current velocities, and calculate and analyze the influence of seawater thermal properties parameters (such as thermal conductivity and specific heat capacity) and different velocities on the static current-carrying capacity of submarine cables. The research findings provide scientific basis for submarine cable selection in offshore wind power transmission projects, thereby enhancing the transmission efficiency and reliability of offshore wind power systems.