Experimental investigation of three-level active neutral point voltage source converters using integrated gate-commutated thyristors
Tipo de material:
TextoDetalles de publicación: Valparaíso: UTFSM, 2013Descripción: xv, 147 p.: ilClasificación CDD: M ELO A552 2013 Nota de disertación: Tesis (Doctor en Ing. Electrónica) -- Prof. Guía:José RodríguezTesis Resumen: The basis for the characterization of the 3L -ANPC-VSC and every power converter is the characterization of the power semiconductors. Semiconductor datasheets include information about the switching losses; however, these are normally obtained in a test circuit, which differs from the specific power converter conditions, such as the stray inductance of the commutation paths or the junction temperature, among others. Therefore, it is necessary to perform an experimental characterization which will lead to more accurate loss models. This work is focused on the experimental investigation of a 3L -ANPC phase leg for medium voltage applications. For this purpose, a 3L -ANPC-VSC testbench was built at the Technische Universität Dresden. It was specially designed to characterize all the 32 ANPC commutations at nominal conditions, i.e. commutation voltages from 2.5 to 3 kV, commutation currents from 0.5 to 5 kA, and junction temperatures from 25 C to 70 C. The 3L -ANPC phase leg features 5SHY55L4500 IGCTs and D1961SH45T presspack diodes. To verify the function of all possible ANPC commutations, suitable switching sequences for the IGCTs, including the dead times, are designed, implemented, and reported for the first time. Each commutation transient is processed and analyzed. From the characterization of the IGCT and the diode for all the ANPC commutations, it is possible to derivate accurate switching loss models, which together with the modulation, will mainly lead to the estimation of the converter?s maximal output power and the converter?s efficiency. The performance of the 3L -ANPC-VSC depends on the loss balancing method. For this purpose, a newly temperature balancing method for the 3L -ANPC-VSC is introduced, the predictive active loss balancing (PALB) method. The PALB method shows a superior performance compared to the standard method (ALB), especially for low frequencies and zero speed applications. Compared to the 3L -NPC-VSC, the 3L -ANPC-VSC applying the PALB method allows output current increments from 15.9% to 316%. Moreover, compared to the 3L -ANPC-VSC applying the standard method, it allows current increments up to 40%. The evaluation of the 3L -ANPC-VSC is performe
| Tipo de ítem | Biblioteca actual | Colección | número de clasificación | Copia número | Estado | Notas | Fecha de vencimiento | Código de barras |
|---|---|---|---|---|---|---|---|---|
Memorias
|
Biblioteca Central | Memorias | M ELO A552 2013 (Navegar estantería(Abre debajo)) | 1 | Disponible | DISPONIBLE A TRAVES DE REPOSITORIO INSTITUCIONAL | 3560900220559 | |
|
Memorias
|
Biblioteca Central | Memorias | M ELO A552 2013 (Navegar estantería(Abre debajo)) | 2 | Disponible | DISPONIBLE A TRAVES DE REPOSITORIO INSTITUCIONAL | 3560900220561 |
Tesis (Doctor en Ing. Electrónica) -- Prof. Guía:José Rodríguez
The basis for the characterization of the 3L -ANPC-VSC and every power converter is the characterization of the power semiconductors. Semiconductor datasheets include information about the switching losses; however, these are normally obtained in a test circuit, which differs from the specific power converter conditions, such as the stray inductance of the commutation paths or the junction temperature, among others. Therefore, it is necessary to perform an experimental characterization which will lead to more accurate loss models. This work is focused on the experimental investigation of a 3L -ANPC phase leg for medium voltage applications. For this purpose, a 3L -ANPC-VSC testbench was built at the Technische Universität Dresden. It was specially designed to characterize all the 32 ANPC commutations at nominal conditions, i.e. commutation voltages from 2.5 to 3 kV, commutation currents from 0.5 to 5 kA, and junction temperatures from 25 C to 70 C. The 3L -ANPC phase leg features 5SHY55L4500 IGCTs and D1961SH45T presspack diodes. To verify the function of all possible ANPC commutations, suitable switching sequences for the IGCTs, including the dead times, are designed, implemented, and reported for the first time. Each commutation transient is processed and analyzed. From the characterization of the IGCT and the diode for all the ANPC commutations, it is possible to derivate accurate switching loss models, which together with the modulation, will mainly lead to the estimation of the converter?s maximal output power and the converter?s efficiency. The performance of the 3L -ANPC-VSC depends on the loss balancing method. For this purpose, a newly temperature balancing method for the 3L -ANPC-VSC is introduced, the predictive active loss balancing (PALB) method. The PALB method shows a superior performance compared to the standard method (ALB), especially for low frequencies and zero speed applications. Compared to the 3L -NPC-VSC, the 3L -ANPC-VSC applying the PALB method allows output current increments from 15.9% to 316%. Moreover, compared to the 3L -ANPC-VSC applying the standard method, it allows current increments up to 40%. The evaluation of the 3L -ANPC-VSC is performe
Tesis
2
CONSULTE EN LINEA A TRAVES DE REPOSITORIO INSTITUCIONAL