Design and Investigation of Improved Perturb & Observe MPPT algorithm for Photovoltaic Systems

Abstract

As the use of energy is increasing, the requirements for the quality of the supplied electrical energy are more tighten. The conventional sources of energy are rapidly depleting and the cost of energy is rising, photovoltaic energy becomes a promising alternative source. Photovoltaic (PV) generation is becoming increasingly important as a renewable source since it exhibits a great many merits such as cleanness, little maintenance and no noise. However, the output power of PV arrays is always changing with weather conditions, i.e., solar irradiation and atmospheric temperature. Therefore, a Maximum Power Point Tracking (MPPT) control to extract maximum power from the PV arrays at real time becomes necessary in PV generation system. In recent years, a large number of techniques have been proposed for tracking the maximum power point (MPP). The present Perturb & Observe (P&O) MPPT algorithm is used in photovoltaic (PV) systems to maximize the photovoltaic array output power, irrespective of the temperature and irradiation conditions. However, the resulting system has poor-efficiency with fixed perturb. In this paper proposes, Improved Perturb & Observe algorithm (IP&O), system for PV arrays is proposed and analyzed. Improved Perturb & Observe algorithm (IP&O) is a very promising technique that allows the increase of efficiency with self-tuning perturb. This paper present in details comparison of most popular MPPT algorithms techniques which are Perturb & Observe algorithm (P&O)