Research on three-phase imbalance control strategy of low-voltage distribution station area

Abstract

Low-voltage distribution network because of its single-phase load quantity, strong randomness and other characteristics, lead to three-phase imbalance phenomenon for a long time, with the distributed generation of high proportion access, the three-phase imbalance problem further aggravated, so this paper proposes a low-voltage distribution station area three-phase imbalance control strategy, first through MATLAB simulation distribution network balance and imbalance two states, gives the phase conversion of system implementation scheme. Then, a multi-objective optimization model with the minimum number of switching times and the minimum three-phase current imbalance of the phase conversion device in the low-voltage distribution station area is established, and a solution method based on the fast non-dominant genetic algorithm (NSGA-II) is proposed, finally, the effectiveness of the proposed method is verified by simulation examples.