Power Control of Solar Grid-Tie Inverter Using Bidirectional DC-DC Converter

Today, we are moving more and more towards green and sustainable energy. This has resulted in ever increasing integration of DGS to service grids. In solar grid-tied inverters, there is a continuous effort by Researchers to provide non-stop power force from Distributed generation systems (DGS) to the service grid to avoid the faults found in grids and to provide assistance to the grid during voltage sag situation. Improved topologies and control approaches have received a lot of attention in order to meet the goal of enhancing the accuracy of solar tied grid inverters, specifically at grid breakdowns. The main objective of this research is to provide a method, a very simple one and at the same time a very reliable and best control solution - envisaging a system for satisfactory performance under distorted grid condition for 3- position 4- line grid- tie inverters for power injection. We do this by utilizing two stages for separate management of the input and yield: a dc - dc converter that extracts the greatest energy from the solar PV modules and an inverter that transfers this electricity to the grid while maintaining grid standards. A DC link balancing solution is also described, which uses a proportionate regulator. The suggested method of control is modelled in the MATLAB-Simulink platform using a 3-position NPC (i.e.,) Neutral Point Clamped grid-tie inverter. The simulation findings are used to validate its performance in terms of operating under undesirable grid setup and reduces THD(i.e.,) Total Harmonic Distortion with the help of simulation results.