Symmetrization of three-phase circuit as the multi-objective optimization problem
The unbalanced loads cause the negative and zero sequences, the temporary variation of active power in the neutral wire that appears in three-phase systems. These components there are usual cause of the increasing energy losses and decreasing the quality of energy. This paper is presented a method, which focuses on the reducing the number of one-phase devices for compensation asymmetry, based on a novel approach to the optimization of the unbalanced operating mode in three-phase power systems. The components, which appear in unbalanced systems, are considered as goal-functions for the multi-objective optimization. For multi-objective optimization, we used a genetic algorithm with non-dominated sorting (NSGA-II). A new approach is proposed for estimating target functions in three-phase systems. This approach allows us to significantly reduce the necessary amount of calculations and proceed to the estimation of objective functions in real time.