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Novel modulator for the hybrid two-cell flying-capacitor based ANPC converter


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Opened Access Novel modulator for the hybrid two-cell flying-capacitor based ANPC converter
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Author: José I. León
García Franquelo, Leopoldo
Kouro, Samir
Wu, B.
Vázquez Pérez, Sergio
Department: Universidad de Sevilla. Departamento de Ingeniería Electrónica
Date: 2011
Published in: International Conference On Power Engineering, Energy And Electrical Drives (Powereng), 1 - 6. Málaga, España : POWERENG
ISBN/ISSN: 2155-5516
Document type: Presentation
Abstract: Among the multilevel converters present in the industry, the hybrid flying-capacitor based active-neutral-point-clamped converter is very recent. It presents good features such as high quality output voltage, high modularity and easy extension to achieve a high number of levels with reduced number of power devices. This paper introduces a simple modulator for the single-phase two-cell hybrid flying-capacitor based active-neutral-point-clamped converter. The modulation technique is based on the determination of a switching sequence formed by two switching states which generate the two nearest voltage levels to the reference phase voltage. Some extra calculations are added to the modulation method to control the dc-link capacitors and the floating capacitor voltages. The computational cost of the modulation technique is low only including simple comparisons and mathematical expressions. Simulation results show the high quality output voltages and currents including the dc voltage control.
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