Abstract
The photovoltaic generation system (PGS) is considered a potential renewable energy harvesting system. However, the low conversion efficiency of PGS and maximum power point tracking (MPPT) technique are the main challenges that must be solved. In addition, the switching frequency of the converters employed also affects the MPPT system performance. A high gain voltage DC-DC converter is proposed to replace conventional power converter and fuzzy logic controller (FLC) is applied in the MPPT for optimizing solar energy harvesting system. Nevertheless, evaluation of suitable fuzzy membership function is needed for optimal MPPT technique of photovoltaic system. In this paper, FLC of MPPT for photovoltaic application system was built using various membership functions in MATLAB/Simulink environment. The switching frequency of the high gain voltage DC-DC converter is varied to test the robustness of the performance of each FLC membership function. The results showed that the FLC-based MPPT technique for high gain voltage DC-DC converter with GBell membership function type has the capability to track the maximum power point (MPP) accurately and to achieve optimum power conversion. Furthermore, GBell membership showed having stable and consistent performance at various switching frequencies.
Highlights
The demand for photovoltaic generation systems (PGSs) shows a graph of significant improvement
The way to increase the power conversion efficiency of PV is to consider the converter topology used. Another way is to optimize the techniques of techniques that have been developed by many researchers to track MPP which is commonly known as maximum power point tracking (MPPT) [7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45]
The final result of this study aims to improve the MPPT technique using Fuzzy Logic Control (FLC) with basic optimization by adjusting the membership function according to the topology and switching frequency of the converter used
Summary
The demand for photovoltaic generation systems (PGSs) shows a graph of significant improvement. The way to increase the power conversion efficiency of PV is to consider the converter topology used Another way is to optimize the techniques of techniques that have been developed by many researchers to track MPP which is commonly known as maximum power point tracking (MPPT) [7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45]. Apart from increasing the power conversion efficiency, the MPPT technique can increase the lifetime of the PV module [8]
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