Design, Simulation, Validation and Comparison of New High Step-up Soft Switched Converter for Fuel Cell Energy System

Torkaman, Hossein; Karami, N.; Nezamabadi, Mehdi

doi:10.22109/jemt.2017.49433

Design, Simulation, Validation and Comparison of New High Step-up Soft Switched Converter for Fuel Cell Energy System

Document Type : Original Article

Authors

Hossein Torkaman ¹

N. Karami ²

Mehdi Nezamabadi ²

¹ Faculty of Electrical Engineering, Shahid Beheshti University, A.C., Tehran, Iran. 1658953571.

² 1Faculty of Electrical Engineering, Shahid Beheshti University, A.C., Tehran, Iran. 1658953571.

10.22109/jemt.2017.49433

Abstract

Fuel cell energy systems can deliver green energy efficiently without CO2 emissions which are nominated as a substitution choice for the conventional power sources. This paper proposes a new high step-up DC-DC converter which is applicable in distributed energy resources, especially for fuel cell power conditioning systems. The converter contains a bidirectional boost cell with a coupled inductor, two transformers whose secondary sides are connected in series to increase the voltage gain and also a voltage doubler. Leakage inductance of coupled inductor limits the currents of output diodes and results in Zero Current Switching (ZCS) of the diodes. The converter schematic is presented at first and then its analysis results in different modes of operation are given. After that the theoretical formulation of voltage gain are achieved and proved. Finally, simulations results for a 400 W/ 380 V load are presented to validate the claimed characteristics of the proposed converter.

Keywords

Fuel Cell

High Step-up Converter

Zero Current Switching

Zero Voltage Switching

Simulation

Subjects