A Cable Configuration Technique for the Balance of Current Distribution in Parallel Cables

A cable configuration technique for the balance of current distribution in parallel-connected single-core cables is proposed. Based on the mutual inductance theorem, a closed form solution for the calculation of current distributions in parallel-connected cables is first derived. To compare the performances of different cable configurations, two indices are introduced, one for the power losses of all cables and the other for the largest cable current. A novel combinationgenerating method for the parallel cables of three phase systems is proposed to create the cable configuration patterns. The index values of the created cable configuration patterns are calculated and sorted to obtain the top configurations which have good current distribution performance. According to the sorting results and magnetic coupling theorem, some recommendations for the configuration of parallel cables are presented, which aim to achieve equal current distribution.