Ilham Nassar-Eddine
ABSTRACT
Due to the large penetration of photovoltaic systems into the grid, improving the power quality and ensuring better grid interconnection became a major issue. Controlling the inverter currents and extracting the PV generator maximum power with intelligent methods are the most important aspects to overcome this issue in the single-stage three-phase grid-connected PV system. For that, we employed the intelligent controllers of fuzzy logic for controlling the inverter currents as well as for maintaining constant the DC-link voltage. Then, we applied a Fuzzy logic algorithm for tracking the PV generator maximum power point and generating simultaneously the reference value of DC-link voltage.
Matlab/Simulink simulations were carried out to evaluate the performances of the intelligent fuzzy logic controller compared to those of classical proportional-integral controller (PI). The simulations results prove that the efficiency of the PV system control strategy using fuzzy logic controllers has been improved in term of reducing the current harmonics as well as the response time of the PV system.
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