Design and Implementation of MPPT Algorithm for Solar Energy System

Renewable energy sources such as solar energy are acquiring more significance, due to shortage and environmental impacts of conventional fuels. The photovoltaic (PV) system for converting solar energy into electricity is in general costly and is a vital way of electricity generation only if it can produce the maximum possible output for all weather conditions. This paper presents the design and practical implementation of the real-time P & O algorithm for maximum power point tracking (MPPT) control in a photovoltaic (PV) system. The PV system usually consists of a PV array that converts solar energy to electrical energy, a DC/DC converter that converters low dc voltages produced by the PV array to a high dc voltage (Buck boost converter), which is directly connected to load or battery. A DSP that controls the total system and implement the MPPT algorithm by controlling the current and voltage of the PV array. The MPPT algorithm is vital in increasing the efficiency of the system. A 100 W prototyping PV system was implemented with a buck boost dc-dc converter using a DSP controller to execute the proposed MPPT algorithm. An MPPT algorithm was tested for fast changing environmental conditions, and the test results are analysed .These are very useful to design low power residential application.