EJONS 16th INTERNATIONAL CONFERENCE ON MATHEMATICS, ENGINEERING, NATURAL & MEDICAL SCIENCES, İstanbul, Türkiye, 11 - 13 Kasım 2023, ss.22
To increase the utility of renewable energy sources in electrical energy production, low-cost
DC-DC converters with high voltage gain and efficiency are used as an interface. The desired
output voltage cannot be obtained with the series-connected form of solar panels as a renewable
energy source, due to the shadow effect and module incompatibility. In renewable energy
systems with the low output voltage and the high output current, there is a need to use DC-DC
converters with a high voltage gain to obtain the desired voltage of the grid system through
inverters. Conventional boost converter has a low efficiency and performance in the high stepup applications due to its wide duty cycle range. Therefore, in order to obtain a high output
voltage, a many DC-DC step-up converters with high voltage gain have been designed in the
literature. There are many proposed topologies in the literature for non-isolated DC-DC
converters with high voltage gain due to their high performance for use in renewable energy
sources. In this study, high step-up non-isolated stacked coupled inductor DC-DC boost
converters are discussed. The coupled inductor boost converters and their derived topologies
have become more remarkable than the others due to their advantages such as; a high voltage
conversion ratio is achieved with fewer components, some designed coupled inductor network
structures, such as active switched coupled inductor network and reverse coupled inductor
network can be included in the input section of the converter, by integrating a boost converter
with a single switching component, a low input current ripple and a quadratic feature can be
achieved. In this study, the generalized topologies of these converter were derived and
categorized. For each category, generalized topologies were evaluated in terms of performance
and efficiency. By taking care a photovoltaic (PV) system example, the efficiency comparison
under the same standards was estimated using the simulation data and the values of the
components data of the manufacturer.