A multi-line hybrid unified power flow controller for distribution network

Abstract

In order to meet the power flow regulation requirements of distribution network and improve the power flow regulation ability as well as response speed, a novel multi-line hybrid unified power flow controller for distribution network (D-MHUPFC) is proposed. Based on Sen transformer, unified power flow controller (UPFC), and hybrid on-load tap changer, D-MHUPFC can quickly adjust the multi-line power flow of distribution network. Compared with the traditional regulation mode, D-MHUPFC has the advantages of compact structure, fast response, good economy, and high reliability. Then, the multi-line power flow equation considering D-MHUPFC is derived with the ZIP load model, and its cooperative control strategy is optimized. Finally, the effectiveness of proposed D-MHUPFC is proved by a 10 kV distribution network simulation platform. The results show that D-MHUPFC and its control strategy can quickly adjust the multi-line power flow within 0.15 s, and transfer the overload power as well as improve the section transmission limit. Moreover, D-MHUPFC can realize decoupling control, and the compensation errors are less than 1%. It is verified that D-MHUPFC has the same power flow regulation ability as UPFC.

Keywords

• sen transformer
• unified power flow controller(upfc)
• multi-line hybrid unified power flow controller for distribution network (d-mhupfc)
• multiple lines
• power flow regulation
• fast switching