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Abstract:
This paper
aims to demonstrate the energy efficiency improvements in a boost converter
using supercapacitors and the Perturb and Observe (P&O) control method,
particularly in the context of photovoltaic (PV) systems under partial shading
conditions. Supercapacitors, known for their high energy density and rapid charge/discharge
capabilities, are integrated into the boost converter circuit to mitigate
voltage fluctuations and enhance energy storage efficiency. The PO control
method is utilized to dynamically adjust the duty cycle of the MOSFET, ensuring
the output voltage remains stable at the desired level of 70V, with an input
voltage range of 30V to 60V. The study employs simulation techniques to
evaluate performance improvements, focusing on energy efficiency and system
stability when supercapacitors are used as filtering elements alongside
advanced control strategies in PV systems experiencing partial shading.
Simulation results indicate a significant reduction in voltage ripple and
enhanced overall system efficiency, achieving a stable output voltage of
exactly 70 volts. Specifically, the efficiency of the boost converter without a
supercapacitor and Zener diode is 8.36%, while the configuration with a
supercapacitor and Zener diode achieves 16.09% efficiency. Most notably, the
configuration with a supercapacitor and without a Zener diode achieves an
efficiency of 50.29%. The findings conclude that integrating supercapacitors
and the PO control method in boost converters for PV applications substantially
enhances energy efficiency and system stability, even under partial shading
conditions
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