A comparative study of MPPT controllers for Photovoltaic Pumping System

this paper presents a comparative analysis of control methods to achieve an optimal PV module output voltage and to track the maximum power point from photovoltaic PV systems under changeable conditions such as (Temperature and solar irradiances) and load changes, with the help of Perturb and Observe "P&O" algorithm that provides the reference voltage. The PV system consists of a solar module and a DC/DC converter; in this case a boost converter is used, connected to a load. The first is to use the integral and derivative (PI) controller, while in the second a Backstepping, with and without integral action, is used. The study is done for a centrifugal pump driven by permanent magnet DC motor. The parameters considered for the comparison are the extracted power from the PV system under changeable conditions such as the temperature and the irradiances and signal ripples. Simulations used to demonstrate the efficiency of the compared methods in presence of the environmental perturbations and load changes.