RECURSIVE IDENTIFICATION OF MPP USING ADAPTIVE MPPT CONTROLLER FOR SOLAR PV SYSTEM

Abstract

In this paper maximum power point of solar PV system is identified recursively using an adaptive maximum power point tracking (MPPT) method for improved dynamic performance. This adaptive controller modifies the behaviour of the system using certainty equivalence principle to maintain the load voltage as constant irrespective of the variation in solar insolation conditions. It also enhances the tracking speed of maximum power point by directly adjusting the duty cycle of the DC-DC converter based upon the system output voltage. Math Work Simulink environment is used for evaluating the performance of the entire system. The simulated results indicate enhanced dynamic performance with improved voltage gain.