A triple port active bridge converter based multi-fed power electronic transformer

Abstract

Integration of multiple power sources using power electronic converters and high-frequency isolation links to supply the sustainable electricity is expected to have a significant impact on the future power system. In this paper, a triple port active bridge converter (TAB) based multi-fed power electronic transformer (TMF-PET) is proposed. The proposed PET consists of three ports having the flexibility to connect the power generating units, grid, and loads. The TMF-PET have three power conversion stages: input, isolation, and output. The input stage consists of two active rectifiers for integrating two different ac sources. The isolation stage consists of a triple port active bridge, and the output stage consists of an inverter. A detailed analysis of the principle of operation and the control techniques used for the converters of these stages are presented. The efficacy of the proposed system is verified using the simulation and experimental studies. The illustrated results show that the discussed controllers of TMF-PET are able to maintain the desired powers and voltages at the inputs and outputs of different power conversion stages. As a result, the proposed system can be used as an efficient energy router to interface different sources and loads in the modern power distribution systems.