Modelling Analysis of Maximum Power Point Tracking using Extremum Seeking Technique with Application of PV System

Immaculate, bountiful and pollution free source of electricity which turned attention of many researchers has been offered by pv cells. A stability analysis for a maximum power point tracking (MPPT) scheme based on extremum-seeking control has been studied for a photovoltaic (PV) array supplying a dc-to-dc switching converter. The PV output needs to be consistent in terms of voltage, so its output can’t be directly fed to electricity bank or to the main grid. Therefore need exists for design of controller. This can extract and calculate the maximum power point from PV array at any moment. PV array usually drives under indistinct/ unclear environmental disturbance and parameters. Here in this paper enhanced extremum seeking MPPT controller is proposed, which has an excellent tolerance of stochastic fluctuations in nature. In the suggested MPPT algorithm, the convergence rate is not pludged by unknown power map as one in conventional ES algorithm. Further the effectiveness of proposed MPPT scheme has been demonstrated using matlab simulations under effect of different irradiations.