A Novel Multiline Fast Electromagnetic Unified Power Flow Controller Topology for Distribution Network

In order to promote the consumption of distributed generations and meet the power flow regulation requirements of the distribution network, a novel multiline fast electromagnetic unified power flow controller for the distribution network (D-MFEUPFC) is proposed. It has the advantages of compact structure, fast response, good economy, and high reliability with the traditional regulation mode. Besides, based on multiwinding transformer and hybrid on-load tap changer, D-MFEUPFC can quickly adjust the multiline power flow of the distribution network and absorb the output of new energy. The operating principles and characteristics of the D-MFEUPFC are analyzed to verify the deductions. Then, the multiline power flow equation considering D-MFEUPFC is derived with the comprehensive load model and power injection method, and its control strategy is studied. Finally, the effectiveness of the proposed D-MFEUPFC is proved by simulations and a prototype experiment. The results show that D-MFEUPFC can quickly adjust the multiline power flow within 60 ms, reasonably absorb the output of new energy, and improve the section transmission capacity. Moreover, D-MFEUPFC can realize decoupling control with high compensation accuracy, and the maximum errors of the active power and reactive power are 8.33% and 3.71%, respectively.