Modified quasi-Y-source converter for increasing boost factor

In this paper, a new topology of quasi-Y-source impedance networks is presented. This converter utilizes the factor of change of winding and shoot through state in order to improve the gain of network. The proposed impedance network employs low turns ratio compared to quasi-Y-source and Y-source networks to achieve high voltage gain. The continuous input current of the proposed converter is an advantage, particularly for the applications related to the renewable energy sources such as Fuel Cell (FC) and photovoltaic (PV) systems. Furthermore, there are dc-current-blocking capacitors in the proposed network, which help to avoid the saturation of the coupled inductor. Operation principles of the converter are discussed and the steady-state relations as well as voltage gain and voltage stress across the dc-blocking capacitors are derived. The proposed converter is compared with the conventional quasi-Y-source network to show the advantages of the converter. Several simulations are performed and the results are shown to indicate the performance of the proposed network. In this paper, an experimental prototype of a converter is presented. To prove the validity and consistency of the proposed network, several tests are carried out. This plan can have a negative gain, similar to the quasi-Y-source network. © 2020 Sharif University of Technology. All rights reserved.