Modeling and performance analysis of perturb & observe, incremental conductance and fuzzy logic MPPT controllers

This paper presents the modeling of three different control techniques used in solar power generation systems using MATLAB Simulink. These techniques are namely Perturb and Observe (P&O), Incremental Conductance (IC) and Fuzzy Logic Controller (FLC) algorithms. These algorithms are introduced in the circuit to facilitate Maximum Power Point Tracking (MPPT). This paper also deals with the analysis and performance evaluation of these three techniques. The P-V and I-V characteristics are obtained for various values of solar irradiation with the cell temperature kept constant. All the algorithms works in association with a DC-DC converter. In this paper a boost converter is utilized for the realization of maximum power point tracking. The results of the three techniques are compared are made based on the factors like PV array dependence, oscillations at maximum power point, algorithm complexity and convergence speed, and suitable conclusions are made.