The cascaded H-bridge converter (CHB) is a well-known solution for multiple applications, such as motor drivesor flexible ac transmission systems, among others. This paperis focused on a CHB composed by a large number of cells(more than three) operated in general with unequal dc voltages.Under this circumstance, the output voltage spectrum presentshigh harmonic distortion at twice the carrier frequency and itsmultiples. In order to analyze this phenomenon, a harmonicdistortion analysis of the CHB output voltage is presented.From this mathematical analysis, a modification of the phase-shifted PWM modulation is proposed in order to obtain a betterharmonic performance
High-quality Output Voltage of Multilevel Cascaded H-bridge Converters with Large Number of Cells with Unequal DC Voltages / Marquez, Abraham; Leon, Jose I.; Monopoli, Vito Giuseppe; Zafra, Eduardo; Vazquez, Sergio; Franquelo, Leopoldo G.; Liserre, Marco. - ELETTRONICO. - (2019). (Intervento presentato al convegno 13th International Conference on Compatibility, Power Electronics and Power Engineering, CPE-POWERENG 2019 tenutosi a Sønderborg, Denmark nel April 23-25, 2019) [10.1109/CPE.2019.8862332].
High-quality Output Voltage of Multilevel Cascaded H-bridge Converters with Large Number of Cells with Unequal DC Voltages
Vito Giuseppe Monopoli;
2019-01-01
Abstract
The cascaded H-bridge converter (CHB) is a well-known solution for multiple applications, such as motor drivesor flexible ac transmission systems, among others. This paperis focused on a CHB composed by a large number of cells(more than three) operated in general with unequal dc voltages.Under this circumstance, the output voltage spectrum presentshigh harmonic distortion at twice the carrier frequency and itsmultiples. In order to analyze this phenomenon, a harmonicdistortion analysis of the CHB output voltage is presented.From this mathematical analysis, a modification of the phase-shifted PWM modulation is proposed in order to obtain a betterharmonic performanceI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
