Power flow control scheme for multiport power electronics transformers

Abstract

Development of power electronics transformers (PETs) has made dc distribution and hybrid ac/dc systems a competitive solution for future network expansion. This study focuses on the functions of a multiport PET interfacing medium-voltage and low-voltage networks. A comprehensive power flow control scheme based on a globalised multiport transmission model of the PET and droop control is derived. This allows for a coordinated energy exchange between the ports of the PET, which enables autonomous operation. Simulations of the proposed approach in a hybrid ac/dc distribution network with different levels of distributed generation and loads verify the effectiveness of the method.

Keywords

• AC-DC power convertors
• power transformers
• power grids
• load flow control
• power electronics
• power convertors
• distributed power generation
• distribution networks
• hybrid ac/dc distribution network
• distributed generation
• multiport power electronics transformers
• hybrid ac/dc systems
• competitive solution
• future network expansion
• multiport PET interfacing medium-voltage
• low-voltage networks
• comprehensive power flow control scheme
• globalised multiport transmission model
• droop control
• coordinated energy exchange