Nowadays the requirement of high frequency
dc-dc converters is steadily increasing in many
application areas such as portable electronics
equipment, telecommunication systems, energy storage
systems and uninterruptible power supplies.
Photovoltaic (PV) power systems is the major renewable
energy resource. But, the output voltage of the PV
system is very low and high dc voltage is necessary
for various applications. So inorder to maximise the
voltage gain, a switched inductor concept is introduced
to enhanced gain buck-boost converter. Here a
switched inductor based quadratic converter is analysed.
This converter is the combination of inverting boost
followed by restructured ZETA converter. This
converter has two active switches and two diodes and
features a quadratic conversionratio. The device stresses
are evaluated and compared to a classical buck-boost, it
exhibits, lower input and output current ripples along
with positive output voltage polarity and high gain. It
also exhibits common ground and non-inverting output
voltage. The operation principles and steady-state
characteristics analysis of the converter is discussed in
detail. Results are obtained by simulating the converter
in MATLAB/SIMULINK R2017b. The simulation
results shows that the converter has high voltage gain
and achieves a peak efficiency of 84% . The converter is
controlled using TMS320F28335 microcontroller.
Keywords :
Boost Inverter, Transformerless, Gain, EffiCiency, THD