Generalized Feed-Forward Sampling Method for Multilevel Cascaded H-Bridge Converters
Abstract—Multilevel cascaded H-bridge converters are usually operated applying a phase-shifted pulse-width modulation (PS- PWM) method. In this modulation strategy, it is important to define the sampling instants in order to obtain a superior harmonic performance in the CHB output waveforms. Previou...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/173884 |
| Acceso en línea: | https://hdl.handle.net/11441/173884 https://doi.org/10.1109/TIE.2023.3319737 |
| Access Level: | acceso abierto |
| Palabra clave: | Harmonic analysis multilevel converters pulsewidth modulation (PWM) |
| Sumario: | Abstract—Multilevel cascaded H-bridge converters are usually operated applying a phase-shifted pulse-width modulation (PS- PWM) method. In this modulation strategy, it is important to define the sampling instants in order to obtain a superior harmonic performance in the CHB output waveforms. Previous approaches to define the PS-PWM method consider a shorter sampling time, becoming even smaller when the number of cells of the CHB is large. In addition, unbalanced operational conditions in the CHB aggravate this issue also degrading the CHB harmonic performance. In this work, both challenges (small sampling time and unbalanced operational conditions) are faced. A feed-forward compensation technique is proposed to face with the unbalanced operating conditions and enlarging the available computational time for control schemes keeping the good CHB harmonic performance. Experimental results demonstrate the superior performance of the proposed strategy |
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