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This paper compares the unbalanced load correction capacity between four different PET topologies: the SPC modular topology, the CPC modular topology, the modular self-balancing topology and a proposed MAB based self-balancing topology. The theoretical analysis show that the SPC and CPC can only achieve unbalanced load compensation within a limited range and both of them require additional power rating...
Power electronic transformer(PET) has been the focus of interest in recent years. Compared with conventional low frequency transformers, PETs can offer many additional functions such as phase shifting, frequency shifting and reactive power/harmonic compensation. This paper proposes a single phase PET for the Scott railway power system. The PET achieves active power control which balances the Scott's...
Power electronic transformer (PET) has many merits as compared with conventional power transformer. For high-voltage high-power applications, silicon based IGBT and the cascaded modular structure are still the mainstream power semiconductor device and structure, respectively. In this paper, a basic design process of the power stage of an H-bridge based three-stage PET system is presented. Based on...
Power Electronic Transformer (PET) has been the focus of interest for many years. The PET opens up the possibility to replace bulky low-frequency transformers, and has more functions and better performance. In this paper, the model and the control strategy of a three-phase three-stage PET are analyzed, and its average model is derived to increase the simulation speed. However, the average model would...
Power electronic transformer (PET) has many merits as compared with traditional power transformer. Therefore, PET is the prospectively significant component in the future power system and renewable energy field. The single-stage PET topology can severely reduce the weight and volume of the system, and has simple control, but has fewer functions as compared with three-stage topology. Therefore, the...
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