Multilevel inverters (MLIs) are capable of producing high-quality output voltage and handling large amounts of power. This reduces the size of the filter while also simplifying the circuitry. As a result, they have a wide range of applications in industries, particularly in smart grids. The input voltage boosting feature is required to use the MLI with renewable energy. Moreover, many components are required to get higher output voltage levels that add weight and cost to the circuit. Numerous MLI topologies have been identified to minimize the losses, device count, and device ratings. A seven-level modified H-bridge inverter with a reduced component count, and reduced THD is presented in this paper. Two DC sources with six IGBTs have been used to generate a seven-level output voltage, and the Aquila Optimizer (AO) has been implemented to get the regulated output. MATLAB/Simulink environment has been used for designing the simulation model. Furthermore, the simulation result has been validated in the laboratory on a hardware setup using the DSP-TMS320F28335 Launchpad. With the reduced number of switching devices as well as the dc supply, the size of the inverter is compacted and becomes more economical.
The globe is currently seeing an unheard-of drive toward renewable
energy due to growing concerns about climate change. Small, distributed
types of generation, like solar photovoltaic, played a significant part
in shifting to a clean energy future due to economic factors and
governmental laws. DC-DC converters are essential in the generation of
solar PV electricity because they regulate the output voltage relying on
the input voltage. The conventional boost converter (CBC) has minimal
output voltage gain, and voltage stress at a switch is typically
equivalent to the output voltage. The voltage produced by distribution
generation (DG) sources is minimal, necessitating the use of high-gain
boost converters. This proposed study is concerned with the development
of an improved architecture of non-isolated high-gain DC-DC converters
for PV applications, which provides quadratic output voltage gain and
reduced voltage stress across a switch. The proposed configuration of
the converter is comprised of a conventional quadratic boost converter
with a voltage lift cell, which provides a high gain. The topological
benefit is the use of a single switch with a lower number of inductors
which reduces the circuit bulkiness. The developed topology was
contrasted in terms of voltage gain, number of passive components used,
and switch stress with other recently presented topologies. The
simulation was performed using MATLAB/SIMULINK, and the output voltage
gain was verified by prototype experimental results employing the
simulation data.
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