Abstract
Metaheuristic techniques have shown remarkable performance in a vast variety of engineering problems. Accurate solving of nonlinear equation set in selective harmonic elimination (SHE) has been one of the widely discussed numerical problems in power electronics. Current study aims at conducting an inclusive comparison of prominent stochastic methods adopted for SHE and modified SHE (MSHE) pulse width modulation techniques. The problem is defined as finding local optima of cascaded H-bride converter operation parameters. The survey investigates key indices of low-order harmonic components and weighted total harmonic distortion. Floating fundamental component is introduced for SHE and MSHE to achieve higher rate of flexibility for optimization techniques. Finally, an advanced modulation technique is proposed to address the dc-link voltage ripples. Simulation and experimental results are presented as a proof of concept.
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