Improved Control of PV System using Variable Step Size
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Date
2025-06-30
Journal Title
Journal ISSN
Volume Title
Publisher
University of M’sila
Abstract
In the present context, where industrial, economic, and ecological development are
the priorities, photovoltaic energy stands as a favorable option when compared to the
use of fossil fuels, which are known to be harmful to the environment. This study
presents an improved Maximum Power Point Tracking (MPPT) method for
photovoltaic systems based on a DC DC boost converter, using a variable step size
method, compared to the drawbacks of the conventional algorithmic MPPT method.
Therefore, five MPPT methods were analyzed and compared: the first is the P erturb
and O bserve method with fixed step size, the second is the P&O method with variable
step size, the third is the IC (Incremental Conductance) method with fixed step size,
the fourth is the IC method with variable step size and the fifth is the PID
(Proportional Integral and Derivative) controller. This study was carried out using a
100kW solar panel under fixed temperature and variable irradiation conditions in
MATLAB/Simulink. The results show the effectiveness of variable step size in terms
of fast response time, overshoot and accurate tracking of MPP.
Description
Keywords
Photovoltaic system, Boost converter, Maximum Power Point Tracking, Perturbation and Observation, Incremental Conductance, Proportional Integral Derivative, Fixed Step Size, Variable Step Size.