Analysis on Influencing Factors of Temperature Distribution of Shore Power Cable

The shore power cable is directly connected between the ship and the shore. Affected by direct sunlight, sea wind and tide, the shore power cable's insulation has aged, which has a significant impact on the shore power cable's service life and current carrying capability. In order to investigate the effects of wind speed, water flow velocity, solar radiation, and ambient temperature on the temperature distribution of shore power cables, the paper builds an electromagnetic-thermal-flow multiphysics simulation model of shore power cable CEU94 - 8.7/10 kV - 3 x 120 mm(2). Each layer of the model takes into account parameters such as thermal conductivity and electrical conductivity of the material and is based on the characteristics of the finite element method to ensure accurate calculation of the temperature distribution. Meanwhile, the boundary conditions such as wind speed and water flow velocity are based on meteorological data and water current measurements of the actual harbor to ensure the technical rationality of the model. The findings demonstrate that the conductor temperature varies in a linear fashion with the surrounding temperature. There is a 10 degrees C increase in the ambient temperature and an 11.66 degrees C increase in the conductor temperature; When the wind speed increases from still to 10 m/s, the maximum conductor temperature decreases by 13.84 degrees C; When the shore power cable is laid in the air, the decrease in temperature is within 2 degrees C when the water speed is 10 m/s, and the decrease in temperature is within 15 degrees C when the wind speed is 10 m/s. When laid in water, the temperature stabilizes with the flow velocity, and the temperature of laying in water is about 5.5 degrees C lower than that of laying in air; In extremely hot summer weather, the shore power cable's maximum conductor temperature is 117.6 degrees C.