Performance and Analysis of Single-Phase Cascaded Boost AC-AC Converter without Commutation Problem

Abstract

The single-phase cascaded AC-AC converter in this article presents the capacity to boost for problems with power quality. High steady-state performance, a power factor at the input side that is almost unity, and a quick dynamic response are the proposed converter performance characteristics. The number of cascaded units can be used to get a high voltage gain. In the cascaded connection, the basic architecture of one unit requires just four IGBT switches with low-voltage ratings. The converter may keep running while achieving the required voltage gain even if one of the cascaded units fails thanks to a suitable PWM-based control mechanism that is developed. Furthermore, it can solve the commutation problem in singlephase AC-AC converters. The suggested AC-AC converters may be short-and open-circuited without damaging the switching devices by employing a basic switching cell construction and coupled inductors. The operation modes and mathematical analysis for the cascaded converter are described. The proposed technique’s effectiveness and reliability are proved using computer simulation using MATLAB/Simulink. In addition, an experimental setup for the system is built on the laboratory to confirm its practicability and tested under various conditions. Already, the excellent match between theoretical and experimental data is obtained.