Research on optimal placement methodology of power cable in ductbank

Abstract

Power cable plays an important role for energy supply for urban areas and lots of cables lay in the ductbank. Usually, ductbank has several pipes arranged in parallel. There are many combined arrangement to set the multi-loop cable in the ductbank. The arrangement of the cable in the proper hole is helpful to improve the current carrying capacity of the cable line. In this paper, the calculation formula of the current carrying capacity of the power cable laid in ductbank is derived. The multi-objective optimization function is established by taking the lowest temperature rise as the objective, and cable laying in ductbank is edited into a binary code which can be recognized by the computer. And then the multi-objective optimization function is solved by NSGA-III algorithm. The pareto solution set of the cable laying is obtained, and the reasonable layout of the cable is gained by comparing the temperature rise variance of each scheme. The results show that the proposed methodology can gain well cable arrangement in ductbank, which can improve the ampacity of the transmission lines.