TY - GEN
T1 - A single leg switched PWM method for three-phase H-Bridge Voltage Source Converters
AU - Senturk, Osman Selcuk
AU - Helle, Lars
AU - Munk-Nielsen, Stig
AU - Rodriguez, Pedro
AU - Teodorescu, Remus
PY - 2009
Y1 - 2009
N2 - This paper proposes a single leg switched or a hybrid PWM (HPWM) method for three-phase three-level H-Bridge Voltage Source Converters (3L-HB-VSCs). By means of the proposed modulation, a 3L-HB-VSC can generate the same output as a three-level neutral point clamped (3L-NPC) VSC with phase disposition (PD) PWM provided that the outputs of 3L-HBVSC are isolated by transformers or connected to open winding machines. Thus, the proposed method is called PD-HPWM. Moreover, it is emphasized that 3L-HB-VSC with HPWM utilizes its switches similar to 3L-NPC-VSC. Compared to 3L-NPC-VSCs, 3L-HB-VSCs (without neutral point clamping diodes) have simpler, more modular, and more reliable 2L circuit structure. Therefore, this method encourages the use of 3L-HB-VSCs in the applications utilizing transformers such as grid-side converters of multi-MW wind turbines. The proposed PWM method's performance is demonstrated by the simulations of a 6MW wind turbine's grid connection and experimentally verified via a smallscale prototype.
AB - This paper proposes a single leg switched or a hybrid PWM (HPWM) method for three-phase three-level H-Bridge Voltage Source Converters (3L-HB-VSCs). By means of the proposed modulation, a 3L-HB-VSC can generate the same output as a three-level neutral point clamped (3L-NPC) VSC with phase disposition (PD) PWM provided that the outputs of 3L-HBVSC are isolated by transformers or connected to open winding machines. Thus, the proposed method is called PD-HPWM. Moreover, it is emphasized that 3L-HB-VSC with HPWM utilizes its switches similar to 3L-NPC-VSC. Compared to 3L-NPC-VSCs, 3L-HB-VSCs (without neutral point clamping diodes) have simpler, more modular, and more reliable 2L circuit structure. Therefore, this method encourages the use of 3L-HB-VSCs in the applications utilizing transformers such as grid-side converters of multi-MW wind turbines. The proposed PWM method's performance is demonstrated by the simulations of a 6MW wind turbine's grid connection and experimentally verified via a smallscale prototype.
KW - H-Bridge
KW - Hybrid modulation
KW - Neutral point clamped
KW - Multilevel converters
KW - Wind energy
U2 - 10.1109/ECCE.2009.5316373
DO - 10.1109/ECCE.2009.5316373
M3 - Article in proceeding
SP - 3137
EP - 3142
BT - Proceedings of the IEEE Energy Conversion and Expo 2009
PB - IEEE
T2 - IEEE Energy Conversion and Expo 2009 - ECCE 09
Y2 - 20 September 2009 through 24 September 2009
ER -