TY - JOUR
T1 - Voltage balancing control in 3-level neutral-point clamped inverters using triangular carrier PWM modulation for facts applications
AU - Chivite-Zabalza, Javier
AU - Izurza-Moreno, Pedro
AU - Madariaga, Danel
AU - Calvo, Gorka
AU - Rodríguez, Miguel Angel
PY - 2013
Y1 - 2013
N2 - In this paper, a novel technique to balance the voltage of the two split dc capacitors of a 3-Level neutral-point-clamped inverter using triangular carrier pulse width modulation is presented. This technique, suitable for reactive power compensation and for inverters operating with a relatively low switching frequency, consists in adding a square wave at six times the output frequency. Subsequently, this paper presents a comparison with two already known strategies in which a sinusoidal waveform at two and six times the output frequency are injected. The current contribution to the midpoint of the dc bus is then analyzed for different modulation indexes and operating conditions. Based on this analysis, a small-signal averaged model, suitable for control design purposes is presented. Finally, simulation and experimental results on a 690-Vac, 120-kVA test bench that validate the theory are shown.
AB - In this paper, a novel technique to balance the voltage of the two split dc capacitors of a 3-Level neutral-point-clamped inverter using triangular carrier pulse width modulation is presented. This technique, suitable for reactive power compensation and for inverters operating with a relatively low switching frequency, consists in adding a square wave at six times the output frequency. Subsequently, this paper presents a comparison with two already known strategies in which a sinusoidal waveform at two and six times the output frequency are injected. The current contribution to the midpoint of the dc bus is then analyzed for different modulation indexes and operating conditions. Based on this analysis, a small-signal averaged model, suitable for control design purposes is presented. Finally, simulation and experimental results on a 690-Vac, 120-kVA test bench that validate the theory are shown.
KW - FACTS
KW - SHE
KW - STATCOM
KW - VSC
KW - insulated gate bipolar transistors (IGBT)
KW - multilevel inverters
KW - static synchronous series compensator (SSSC)
UR - http://www.scopus.com/inward/record.url?scp=84875202916&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2012.2237415
DO - 10.1109/TPEL.2012.2237415
M3 - Article
AN - SCOPUS:84875202916
SN - 0885-8993
VL - 28
SP - 4473
EP - 4484
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 10
M1 - 6401198
ER -