FPGA based photovoltaic (PV) inverter with SPWM algorithm for photovoltaic system

With the growing concern related to global warming and energy security a need for a clean source of energy has risen. PV system is one of the best renewable sources of energy. PV inverter is a part of the Photo-Voltaic system which is capable of converting AC current into DC current so that the power produced can be used in household appliances and grids. In this paper SPWM technique is used as a control mechanism of PV inverter, behaviour of different FPGAs at three different frequencies is analysed and a most efficient system is find out. The performance of PV system depends upon many factors like irradiation level, temperature and environment effect. So that maximum power is extracted out of PV system, Maximum Power Point Tracker (MPPT) is used using this output load gets maximum power from the panel. In this paper for control signal generation for PV inverter a digital design of sinusoidal pulse width modulation (SPWM) algorithm is used which is designed on VHDL and the design of SPWM algorithm is implemented on field programmable gate array (FPGA). This is a cost efficient technique it can be easily used in developing nations as well.