Abstract
This paper deals with the Maximum Power Point Tracking (MPPT) for photovoltaic energy system. It includes photovoltaic array panel, DC/DC converter, and load. The operating point for photovoltaic energy system depends on climatic parameters and load. For each temperature and irradiation pair, there exists only one optimal operating point which corresponds to the maximum power transmitted to the load. The photovoltaic energy system is described by nonlinear equations. It is transformed into an augmented system which is described with a Takagi-Sugeno (T-S) fuzzy model. The proposed MPPT algorithm which permits transfering the maximum power from the panel to the load is based on Parallel Distributed Compensation method (PDC). The control parameters have been computed based on Linear Matrix Inequalities tools (LMI). The Lyapunov approach has been used to prove the stability of the system. Some reliable simulation results are provided to check the efficiency of the proposed algorithm.
Highlights
In the most recent years, photovoltaic (PV) energy has been the subject of several research projects
In the second part of the third section, we describe the T-S fuzzy reference model and the Maximum Power Point Tracking (MPPT) algorithm which is based on T-S fuzzy system
A new algorithm strategy based on the augmented Takagi-Sugeno type fuzzy system has been proposed for the MPPT of a PV energy system
Summary
In the most recent years, photovoltaic (PV) energy has been the subject of several research projects. It is well known that the PV array power panel depends on climatic variables such as temperature and irradiation as shown in Figures 2 and 3. The operating point is variable and the load cannot extract maximum power from the panel. To overcome this disadvantage, a DC/DC converter is inserted between the panel and the load. The main contribution which deals with Maximum Power Point Tracking for photovoltaic panel, consists on developing a new algorithm based on augmented T-S fuzzy system. The optimal duty cycle, which permits extracting the maximum power from the photovoltaic array panel, is computed based on PDC techniques.
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