Maximum Power Point Tracking Algorithm for Grid-connected Photo Voltaic System

The Photo-Voltaic (PV) system is designed to supply solar power through photo-voltaic. The PV generator exhibits non-linear voltage-current characteristics and its Maximum Power Point (MPP) varies with cell temperature and solar radiation. The MPP Tracking (MPPT) technique gains more attraction in the field of PV systems and it is considered as a vital part in photovoltaic system design to maximize the output power of a photovoltaic array. The conversion efficiency of PV arrays is typically low; it requires MPPT control techniques to enhance the efficiency. The MPPT technique has been proposed for PV systems to reach the MPP. The most common issues associated with MPPTs are low tracking efficiency, need more transient time and steady state oscillation. This paper presents a comprehensive review of the MPPT techniques and analyzed the merits and demerits with different factors such as MPP, tracking error and power estimation error. (paper)