Artículo
Variable-Angle Phase-Shifted PWM for Multilevel Three-Cell Cascaded H-bridge Converters
Autor/es | Márquez Alcaide, Abraham
León Galván, José Ignacio Vázquez Pérez, Sergio Portillo Guisado, Ramón Carlos García Franquelo, Leopoldo Freire Macías, Emilio Kouro, Samir |
Departamento | Universidad de Sevilla. Departamento de Ingeniería Electrónica Universidad de Sevilla. Departamento de Matemática Aplicada II |
Fecha de publicación | 2017 |
Fecha de depósito | 2020-01-24 |
Publicado en |
|
Resumen | Multilevel cascaded H-bridge converters have become a mature technology for applications where high-power medium ac voltages are required. Normal operation of multilevel cascaded H-bridge converters assumes that all power ... Multilevel cascaded H-bridge converters have become a mature technology for applications where high-power medium ac voltages are required. Normal operation of multilevel cascaded H-bridge converters assumes that all power cells have the same dc voltage, and each power cell generates the same voltage averaged over a sampling period using a conventional phase-shifted pulse width modulation (PWM) technique. However, this modulation method does not achieve good results under unbalanced operation per H-bridge in the power converter, which may happen in grid-connected applications such as photovoltaic or battery energy storage systems. In the paper, a simplified mathematical analysis of the phase-shifted PWM technique is presented. In addition, a modification of this conventional modulation method using variable shift angles between the power cells is introduced. This modification leads to the elimination of harmonic distortion of low-order harmonics due to the switching (triangular carrier frequency and its multiples) even under unbalanced operational conditions. The analysis is particularized for a three-cell cascaded H-bridge converter, and experimental results are presented to demonstrate the good performance of the proposed modulation method. |
Cita | Márquez Alcaide, A., León, J.I., Vázquez Pérez, S., Portillo Guisado, R.C., García Franquelo, L., Freire Macías, E. y Kouro, S. (2017). Variable-Angle Phase-Shifted PWM for Multilevel Three-Cell Cascaded H-bridge Converters. IEEE Transactions on Industrial Electronics, 64 (5), 3619-3628. |
Ficheros | Tamaño | Formato | Ver | Descripción |
---|---|---|---|---|
ALL_16-TIE-1377.pdf | 4.687Mb | [PDF] | Ver/ | |