High Gain Boost Converter with Reduced Voltage in Capacitors for Fuel-Cells Energy Generation Systems

Abstract

This work presents a power-electronics based system for renewable energy applications, the system is driven with an only one switch quadratic type boost converter, the discussed converter is based on a stack of switching stages which provide a large voltage gain, a desirable feature for fuel cell generation systems, the converters gain function is the quadratic boost-type converters; furthermore, the topology can be extended. The major benefit of the topology is that there is not a capacitor that sustains the entire output voltage, in contrast to other similar topologies in which there is a capacitor rated to the output port voltage, there is no high voltage capacitor in this system. Experimental verification is presented to confirm the system principles; experiments included a fuel cell emulator that was built and used for the experiments.

Development of an efficient voltage regulation mechanism for switched capacitor converter with exponential gain

“…To achieve maximum efficiency, V o,o.c. has to be as low as possible as indicated in (1). For a given reference output voltage * , o V the number of idle stages (j) is determined to meet the following condition:…”

“…Step-up DC-DC converters with high voltage gain and wide voltage range are required in variety of applications [1,2]. Most step-up converters use inductors to trap energy in order to lift the output potential [3−5].…”

Output Voltage Ripple Reduction in a Symmetric Multistage-Stacked Boost Architecture (MSBA) Converter

“…Other solutions to achieve large voltage gain are the use of voltage multipliers combined with traditional converters [4][5][6], or quadratic topologies [7,8].…”

Ultimate Transformerless Boost DC-DC Converter for Renewable Energy Applications

“…In case of applications such as photovoltaic (PV) energy systems, a step-up dc/dc boost converter is mandatory to boost low voltage to high voltage to enable grid integration or supply power to an islanded load. In most of the practical cases, the converter is configured to generate output voltage around 400 V with input voltage ranges from 18 to 50 V only [3]- [5].…”