Flexible Harmonic Control For Three-Level Selective Harmonic Modulation Using The Exchange Market Algorithm

Reduction of switching losses in power converters is especially important for very high power applications looking for improving the reliability and efficiency. In contrast to carrier-based modulations, selective harmonic elimination and mitigation techniques use optimal waveform computation to generate a fundamental component while managing voltage harmonic content. However, these techniques, and specially selective harmonic mitigation, impose a high non-linear set of expressions to be solved. Therefore, complexity and computational burden rise up. Meta-heuristic algorithms are commonly used to solve the mathematical optimization problem involved. Preliminary application of Exchange Market Algorithm for harmonic mitigation problem has already been presented. However, in this paper a redefinition of the optimization is proposed to consider harmonic content for a wider range of frequencies. Results from computation for a wide range of modulation index are presented.