Optimal scheduling of asymmetrical AC/DC micro-grid based on PET

Aiming at the AC/DC hybrid micro-grid with power electronic transformer (PET) and considering the asymmetric operation mode of three-phase load in low voltage AC system, a multi-objective optimal scheduling model of AC/DC system based on PET is proposed in this paper. In view of the topology of PET establish its steady state model then analyzing the three-phase unbalance mitigation mechanism. Make full use of the flexibility of multi-port PET to coordinate the controlled DGs in AC/DC networks. Then a long-time scale optimal scheduling model was established to minimize the operating costs and suppression the three-phase voltage unbalance factor. The economy and reliability of the system have been improved. Finally through the simulation analysis of the constructed example, the results verify the correctness and effectiveness of the proposed model in this paper.