Abstract:
Renewable energy systems (solar, fuel cells, batteries) are one of the trending research topics due
to its ease of availability, sustainability, and environmental friendliness. DC-DC converters
impart a crucial role in these renewable energy systems while boosting up the voltages to higher
levels. In this thesis, a novel structure of DC-DC boost converter based on voltage lift technique
is presented. The extensive analysis is performed for the proposed converter in continuous
current mode (CCM) and discontinuous current mode (DCM) along with the voltage and current
relations of converter elements and semiconductor devices. Moreover, critical values of
inductors are determined to investigate the boundary conditions between CCM and DCM. It was
firmly concluded that while considering the lesser number of elements and semiconductor
devices for the same input voltage the proposed converter can yield comparatively high voltage
gain than the conventional boost dc-dc converters. Root mean square (RMS) values of the
voltages and currents for the elements and semiconductors are also calculated along with the
converter’s efficiency at various duty cycles. Simulation results of the proposed converter are
provided in CCM and DCM using PSIM software. Finally, to avail the desired validation of
acquired simulation results a laboratory prototype of the proposed converter is tested and
comparisons were made with the theoretical analysis.
