Investigation of voltage regulation in grid connected PV system

In the present scenario the power requirement on load side is increasing day by day, so to balance the power demand and power supply various renewable energy comes to picture as the additional source of electricity generation. The power generated by various renewable resources such as solar, wind, tidal energy and geothermal sources is environmentally clean and have a less emission impact. Out of which PV system draws more attention because it generates energy with a much lower level of carbon dioxide emissions. In the proposed work the objective is to investigate the synchronisation between grid and PV system in terms of voltage and frequency. It includes P-V characteristics under the circumstances of MPPT technique such as P & O technique can able to find local maximum point. The proposed inverter is a voltage source H-Bridge inverter which is controlled using a Clarke and Park transformation to drive a controlled current into the grid to maintain the THD value within the standards. As the grid frequency is fluctuating between ±0.5%. SRF-PLL is generally used to fix the output frequency and phase of the grid. It also includes with the modelling of 3∅ H-bridge inverter as an interface between PV system and grid system. The projected work is designed and simulated in MATLAB SIMULINK 2017b environment