Implementation & Analysis of MPPT Scheme for a Single Stage PV System

A grid-connected Photovoltaic system with the functionality of maximizing power capability and increased the power rating is introduced in this work. Increasing interest and investment in renewable energy gives rise to rapid development of high penetration solar energy. There are multiple-choice to interface PV arrays with the utility grid. The topology of a single stage (PV) system with two MPPT techniques to increase the power capability is developed; it is suitable for grid connected system. However, output of solar arrays varies due to change of solar irradiation and weather conditions. Therefore, the MPPT algorithm is implemented in auxiliary half-bridge (DC-DC) converter to enable PV arrays to operate at maximum power point. The proposed PV system can effectively increasing permissible dc voltage of a grounding of PV arrays in series with paralleling of auxiliary half-bridge converter, with no need for additional insulation and fuses. This monograph presents the performance of the proposed single-stage PV system with two MPPT techniques. The proposed system has been simulated using MATLAB/SIMULINK software and the results are verified by using hardware implementation.

The authors are working in the Department of Electrical and Electronics Engineering at Bannari Amman Institute of Technology, Sathyamangalam, Tamilnadu,India. They are involved in commissioning and maintenance of a 600 kW roof-top solar plant in their institution. Their research interest includes solar PV system, Power Electronics and Wind Energy