Improvement of Efficiency for AC Photovoltaic Module by Using High Step Up Dc – Dc Converter

Abstract

The photovoltaic (PV) applications are becoming a fast growing segment in the PV market due to the shortage of the fossil fuel energy and the great environmental pollution. The renewable energy sources such as PV modules, fuel cells or energy storage devices such as super capacitors or batteries deliver output voltage at the range of around 15 to 40 V DC. In order to connect them to the grid the voltage level should be adjusted according to the electrical network standards in the countries. In general low voltage output is obtained from the PV panel. In order to get high voltage the numbers of the panelsare increased. So the cost the equipment is more. So to avoid this disadvantage a new system is proposed with a coupled inductor. By using the turn ratio of the coupled inductor the voltage and gain of the system can be increased with respect to the sudden loading condition. The obtained high DC output voltage from the proposed converter is converted in to AC voltage by using a 3-level inverter and different loads are connected to that and simulation results are presented. Simulation is carried out in MATLAB/SIMULINK soft ware.