Classification and Comparison of Maximum Power Point Tracking Techniques in DC Micro-Grid Standalone Photovoltaic Systems

Utilizing fossil fuel for conventional power generation has become the major contributor of the greenhouse gas emission. Photovoltaic (PV) power generation are becoming a suitable option to replace conventional power generation to overcome negative environmental impact posed by the use of fossil fuel. However, due to non-linear PV module curve and variable irradiance, the technology produces variable output power which compromises system efficiency. To produce maximum power from the PV module requires Maximum point tracking (MPPT) device. However, choosing a suitable one for specific PV application has been a challenge. This paper has categorized the commonly used MPPTs as Heuristic, model based and hybrid techniques and compared them in terms of their performance which will guide the system designer for implementation purposes. Matlab/Simulink is used to verify the behavior of these MPPTs and the results proved that hybrid technique are highly efficient compared to heuristic and model based MPPT but are more complex in design.