Primary Review on MPPT Method and Size of Grid Connected Solar Photovoltaic Inverter

In case of grid connected solar photovoltaic inverter, the MPPT technique and size of inverter should be selected carefully. The study in this paper is aimed to address these two major issues subjected with grid connected solar photovoltaic system viz. (i) accurate tracking of maximum power point and (ii) power loss due to use of centralized inverter. Although these both issues are independent of each other, they will result in power loss and reduced output power. The conventional MPPT method suffers from three major problems of continues oscillations around MPP, divergence away from MPP by losing the tracking direction and partial shading. Lot of modified version of MPPT methods are presented by researchers around the globe to address the problem and possible solutions, few of them are discussed in this paper. Still, the advanced MPPT methods are yet to be commercialized. In addition to that, a centralized inverter for large solar photovoltaic power plant has few dis advantages like module mismatch loss, shading losses etc. A module integrated inverter can be the best option to reduce this power loss problem. A comparative analysis of power generation by centralized inverter and module integrated inverter is done for 3.0kWp solar photovoltaic system in PVSyst software.