INTRODUCTION:
The
amount of power generated from a photovoltaic (PV) system mainly depends on the
following factors, such as temperatures and solar irradiances. According to the
high cost and low efficiency of a PV system, it should be operated at the
maximum power point (MPP) which changes with solar irradiances or load
variations. This paper presents an improved maximum power point tracking (MPPT)
algorithm of a PV system under real climatic conditions. The proposed MPPT is
based on the perturbation and observation (P&O) strategy and the variable
step method that control the load voltage to ensure optimal operating points of
a PV system. The proposed MPPT algorithm has been implemented by a dSPACE DSP controller.
The experimental results show that the PV power System, using the proposed MPPT
algorithm, is able to accurately track maximum power points (with minimum
steady-state power oscillations) under rapid ir-radiance variations.
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