FPGA implementation of DPWM utility/DG interfaced solar (PV) power converter for green home power supply

In this paper, utility/DG interfaced DPWM solar (PV) power converter (SPC) has been proposed and developed to meet the growing green energy demand of household applications in a developing country like India. The use of new software based direct PWM strategy (DPWM) in the inverter circuit has resulted in to produce a very near sine-wave, most suitable for various home loads. Simulated results of proposed PWM output wave form and computation of its harmonics content in terms of THD value (upto 5% or even less) using MATLAB software has been reflected in the proposed scheme. The features like an intelligent control action to prevent battery from overcharge or undercharge, higher efficiency (> 90%), generation of grid quality green electricity, sustainability of solar renewable energy sources, cost effective hardware realization with FPGA based VLSI embedded system, shows the superiority of the proposed scheme over conventional power supply systems.