Space Vector Modulation for Two Level and Three Level Vsi and Comparison with Wavelet Modulation

Multilevel inverters with space vector pulse width modulation strategy are gained importance in high power high performance industrial drive applications.This paper presents a simplified space vector PWM method for a two-level and three level inverter The threelevel inverter has a large number of switching states as compared to two level inverter. In the proposed scheme, three-level space vector PWM inverter is easily implemented as conventional two-level space vector PWM inverter. Therefore, the proposed method can also be applied to multilevel inverters. Simulation results are presented for various operation conditions using R-L load to verify the system model .Also Wavelet modulation technique is also introduced .The output of power inverter using wavelet modulation is found to be the best approximation of the continuoustime sinusoidal reference signal over Space vector modulation and all other modulation technique.