COMPARISON AND EVALUATION OF THE SINGLE-PHASE FIVE-LEVEL VIENNA WITH FIVE-LEVEL SMC USING SIC DEVICES IN TERMS OF ITS PERFORMANCE AND FAULT TOLERANCE

Abstract

The VIENNA converter is best known for using the fewest semiconductor devices. The purpose of this paper is to do a comparative analysis of the overall loss of the 5-level VIENNA converter, and to compare the fault tolerance of this converter with equivalent 5-level Stacked multicell converter (SMC). New SiC MOSFET and SiC JFET are used, in term of conduction losses and switching losses, SiC MOSFET is better. Both 5-level VIENNA and SMC topologies are studied in this article have fault tolerant capability. But to get that capability in the design, the SMC diodes have to choose with double of rating voltage, which also greatly increases the conduction losses. In terms of energy VIENNA is better than SMC, but in terms of fault tolerance, VIENNA allows the first short-circuit, and for the second fault, it needs to be equipped with fusible at both terminals. PSIM simulation is realized for validation this study