Efficient Implementation of Maximum Power Point Tracking Using Perturb and Observe Method

Abstract - Solar energy and photovoltaic system are used to power the embedded system and other mobile devices. Since, the output characteristics of a photovoltaic array vary nonlinearly when temperature or irradiance conditions change, the maximum power cannot be achieved by directly connecting the PV models. Tracking of the Maximum Power Point (MPP) must be used to effectively get the maximum output power. According to Maximum Power Transfer theorem, the power output of a circuit is maximum, when the Thevenin impedance of the circuit or source impedance matches with the load impedance. Hence, our problem of tracking the maximum power point reduces to an impedance matching problem and also improves the efficiency of the solar panel. The improved MPPT technique, which is constructed with close loop control system with DC to DC converter and also follow the basic requirements of MPPT ie., temperature and radiation.