Design and Implementation of a Power Conversion Module for Solid State Transformers using SiC MOSFET Devices

Abstract

This paper describes the design and implementation of a unit module for a 10 kVA class 13.2 kV/220 V unidirectional solid-state transformer (SST) with silicon-carbide metal-oxide-semiconductor field-effect transistors. The proposed module consists of an active-front-end (AFE) converter to interface 1320 V AC voltage source to 2500 V DC link and an isolated resonant DC-DC converter for 500 V low-voltage DC output. The design approaches of the AFE and the isolated resonant DC-DC converters are addressed. The control structures of the converters are described as well. The experiments for the converters are performed, and results verify that the proposed unit module can be successfully adopted for the entire SST operation. (g 1 , g 2 , g 3 ,g 4 ) (g 1 , g 2 , g 3 ,g 4 ) (g 1 ,g 2 , g 3 , g 4 ) (g 1 ,g 2 , g 3 , g 4 )(1,1,0,0) (0,0,0,0) (0,0,1,1) (0,0,0,0)