Abstract

Grid-connected voltage source converters are widely used in various applications. In these Grid-connected converters, volume of the passive components such as AC side inductors and harmonic filters becomes sometimes a practical problem. As a solution to reduce the volume of the passive components in the grid-connected converters, flying capacitor multilevel converters are expected. The multilevel converters can generate multilevel voltage waveforms in the AC side with smaller instantaneous deviation from its reference. Therefore, the multilevel converter can miniaturize the AC side inductors and harmonic filters. In this paper, to obtain guidelines to reduce the volume of the passive components, the minimum required capacitance of the flying capacitors and required inductance of the AC side inductors are investigated.

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