784 / 2022-03-31 21:59:48

Ampacity analysis and optimization of AC XLPE submarine cable based on genetic algorithm

submarine cable,ampacity,genetic algorithm,thermal circuit model

Purpose/Aim

The steady-state thermal circuit model based on IEC 60287 standard is widely used to analyze the ampacity of submarine cable due to the high efficiency. However, the value selection of some parameters only refers to the range given by IEC 60287 standard in the existing thermal circuit models, without specific suggestions. In this paper, a method for steady-state thermal circuit model optimization of AC XLPE submarine cable based on genetic algorithm is proposed, which improves the accuracy of the steady-state thermal circuit model.

Experimental/Modeling methods

Based on IEC 60287 and JB/T 10181 standards, this paper investigates the parameter values of the submarine cables used in literatures in recent years. By selecting the key parameters that affect the ampacity of submarine cable and setting the initial value, the steady-state thermal circuit model is established based on the genetic algorithm. After iterative calculation, the optimal solution with the minimum error of the cable ampacity is finally obtained.

Results/discussion

The key parameters affecting the ampacity of submarine cable mainly are the soil thermal conductivity coefficient ρ and the surface heat transfer coefficient h, as well as the ratio of the metal sheath temperature to the conductor temperature η. The calculation results show that the steady-state thermal circuit model of submarine cables optimized by genetic algorithm has less error than the ordinary steady-state thermal circuit model, compared with the experimental results.

Conclusions

The steady-state thermal circuit model optimization method of AC XLPE submarine cable based on genetic algorithm proposed in this paper effectively reduces the error of the ampacity calculation, and provides suggestions for the value selection of submarine cable parameters in the model.