Modified hysteresis switching scheme for 3-phase voltage source inverter

This paper presents a new switching scheme for 3-phase Voltage source inverter to tackle the harmonics problem in off-grid power system. The proposed strategy is modification over the existing strategy of hysteresis band current control method. The proposed switching strategy for 3-phase inverter system is an upgrade of the scheme that has been tested already with 1- phase system. Simulation with linear as well as nonlinear loads has been performed using new scheme as well as PWM scheme. The results obtained have been compared with results of PWM scheme and the proposed scheme has shown much improved outcomes compared to the PWM scheme. The comparatively higher output voltage and current also ascertain the usefulness of new proposed switching methodology.