Abstract
In this paper thirteen level asymmetrical multilevel inverter (MLI) is presented. The topology produces thirteen level at the output using eight switches and three voltage sources. The main problem associated with power electronic converters are lower order harmonics. In this paper two control techniques are discussed, which are used to reduce the total harmonic distortion (THD) without using any filter circuit. Nearest level control (NLC) pulse-width modulation and selective harmonic elimination (SHE) technique has been used to generate gating pulse to get better output voltage. The generated pulse has low switching frequency which reduces the switching losses. A three phase MLI topology with reduced number of switches will improve the efficiency and reliability of the topology. Detailedanalysis of MLI topology has been carried out to show the special features of the topology. Comparison of different modulation technique has also been done and various simulation result have been included in this paper.
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