SURVEY OF MAXIMUM POWER POINT TRACKING TECHNIQUES IN SOLAR PV SYSTEM UNDER PARTIAL SHADING CONDITIONS

Conventional energy sources such as thermal, diesel appliances, and nuclear are difficult to generate the electricity for the presence of greenhouse emission, maintenance problem. To overcome such problems, solar energy is one of the fastest growing renewable energy sources across the globe. In recent trends, solar power generation has tremendous growth. Solar energy offers various advantages such as contamination free, quiet in operation, long life, zero input energy cost, low maintenance. From the sunlight the light beams will be hit on a photovoltaic cell, it emitted the electrons from n-type to p-type layer and it will generate the power. Partial shading may takes place due to clouds, trees, dirt and dust in solar power generation systems. In partial shading, multiple peaks are followed in the PV characteristic curve. MPPT is a technique used to track the maximum power point of the PV source. MPPT can minimize the system cost and maximize the array efficiency. For tracking the GMPP, different types of algorithms and various techniques for MPPT are reported in various literatures. This paper reviews about the various MPPT algorithms of PV system based on partial shading conditions.