ABSTRACT
Multilevel inverters are attractive in industrial applications due to low total harmonic distortion (THD), low stress on power switches and they are free from EMI issues. The quality of output power from an inverter can be improved using a few traditional modulation and control techniques. SPWM and its variants are pretty in control due to ease of control. But switching losses are higher because of higher switching frequencies. In the SHE technique, an inverter works with a low switching frequency thereby switching losses are less. Also, the lowest harmonics can be removed to reduce the filtering components. In this work, the comparative analysis of optimization algorithms such as the Cuckoo Search Algorithm (CSA), Particle Swarm Optimization (PSO), Simulated Annealing and Bat Algorithm (BA) are discussed for nine-level inverters and the experimental results have been verified with simulation results.
