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A hybrid multilevel converter for medium and high voltage applications

Adam, Grain Philip and Ahmed, Khaled and Singh, N.K. and Finney, Stephen and Williams, Barry (2010) A hybrid multilevel converter for medium and high voltage applications. In: IEEE PES Trondheim PowerTech 2011, 2011-06-19 - 2011-06-23. (Unpublished)

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Abstract

This paper investigates the suitability of the hybrid multilevel converter for medium and high voltage application. The converter operation, modulation, and capacitor voltage balancing method are described in detail. The ability of the hybrid multilevel converter to operate with different modulation indices and load power factors is investigated. It has been established that the hybrid multilevel converter is capable of operating independent of load power factor. Operation with variable modulation index increases voltage stresses on the converter switches and does not alter the fundamental voltage magnitude as in all known voltage source converter topologies. The viability of the hybrid multilevel converter for medium and high voltage applications is confirmed by simulations.