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Selective harmonic elimination in five level inverter using sine cosine algorithm

Multilevel inverters (MLIs) are getting popular in high power application due to its inherent characteristics of minimal switching losses due to low switching frequency. This paper presents elimination of important lower order 5th harmonic in cascaded five level inverters. This has been performed by solving multiple variable high-order nonlinear equations with aim to reduce total harmonic distortion (THD), using recently introduced sine cosine algorithm. The proposed method efficiently eliminates the pre-specified 5th harmonic with reduced THD.