A Combination of INC and Fuzzy Logic-Based Variable Step Size for Enhancing MPPT of PV Systems
(1) Ouassa Mohammed Lamine Mail (El-Oued University, Algeria)
(2) Noureddine Bessous Mail (El-Oued University, Algeria)
(3) Borni Abdelhalim Mail (Ghardaïa Université, Algeria)
(4) Fahd A. Banakhr Mail (Yanbu Industrial College, Saudi Arabia)
(5) Mohamed I. Mosaad Mail (Yanbu Industrial College, Saudi Arabia)
(6) Mammeri Oussama Mail (El-Oued University, Algeria)
(7) * Mohamed Metwally Mahmoud Mail (Aswan University, Egypt)
*corresponding author

Abstract


The significance of using the variable step Incremental Conductance (INC) technique in Maximum Power Point monitoring (MPPT) of photovoltaic (PV) systems resides in its capacity to improve the efficiency of energy conversion. This is accomplished through the constant measurement and comparison of incremental changes in current and voltage, precisely monitoring the maximum power point amidst changing environmental conditions. This traditional INC-MPPT approach has two primary disadvantages. Initially, it employs a predetermined scaling factor that necessitates human adjustment. Furthermore, it adjusts the inclination of the PV characteristics curve to modify the step size. This implies that even little changes in PV module voltage will have a substantial impact on the total step size. As a result, it shifts the operating point away from the intended reference maximum power point. The objective of this work is to improve the efficiency of traditional INC by overcoming the constraints associated with step size modifications. This is achieved by using a fuzzy logic (FL) technique to adjust the step size adaptively in response to environmental changes. The presented INC-FL-MPPT successfully achieves MPPT for a PV system under enhanced steady-state and transient-state settings. The results demonstrate the superiority of the suggested approach compared to three distinct MPPT strategies, namely Perturb and Observe (P&O), Classical INC, and P&O-FL technique.

Keywords


INC MPPT; Fuzzy Logic; Variable Step Size; Direct Control of PV Panel; Boost DC-DC Converter

   

DOI

https://doi.org/10.31763/ijrcs.v4i2.1428 		      

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International Journal of Robotics and Control Systems
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