REDUCTION OF SWITCHING LOSS IN GRID-CONNECTED INVERTERS USING A VARIABLE SWITCHING CYCLE

Distributed generation s (DGs) converting renewable energy sources such as solar , wind power , and biomass into grid system s have become very popular in the world recently . The DG using power inverter injects significant harmonics into the grid and can cause in stability of the system . Thus, t he stringent grid standards are imposed by utility companies t o maintain the grid stability . These lead to requirement of reducing current harmonic s of grid - connected inverters to achieve compliance with such grid codes . Increasing the switching frequency of the sinusoidal pulse - width modulation ( SPWM ) of inverters is a common method for reducing the total harmonic distortion (THD) of the current ; however, this increases switching losses .