MPPT for PV using Coupled Inductor SEPIC converter for standalone power system

The characteristic of the photovoltaic system (PV) varies with time to time based on solar irradiation and whether condition. However, the Maximum Power can be extracted from the PV system with the help of Maximum Power Point Tracking (MPPT) techniques. In this paper, a Perturb and Observe (P & O) algorithm is used to obtain the maximum power by the procedure of perturbing and observation. To avoid the ripple content present in the solar cell array (SCA) current a Coupled Inductor SEPIC converter is proposed here based on governing circumstance of the ripple. Moreover, the efficiency of the converter is improved by using coupled inductor because it needs only lesser amount of magnetic core. So the P & O algorithm changes the duty cycle of the converter switch to cope with the load equivalent to the Maximum Power. It is achieved by MPPT algorithm, and it is determines the changes in converter duty cycle. In this invention, Mathematical models are defined and P & O algorithm is progressed. Then the PV system incorporated with MPPT controller modeling is invented in the SIMULINK.