TY - GEN
T1 - Voltage balancing control in 3-level neutral-point clamped inverters using triangular carrier PWM modulation for FACTS applications
AU - Chivite-Zabalza, F. J.
AU - Izurza, P.
AU - Calvo, G.
AU - Rodríguez, M. A.
PY - 2011
Y1 - 2011
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 PWM 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, the 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 mid-point of the dc bus is then analysed 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 V AC, 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 PWM 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, the 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 mid-point of the dc bus is then analysed 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 V AC, 120 kVA test bench that validate the theory are shown.
KW - Distribution FACTS (DFACTS)
KW - FACTS
KW - IGCT
KW - Multilevel inverters
KW - Static Synchronous Compensator (STATCOM)
UR - http://www.scopus.com/inward/record.url?scp=80053510180&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:80053510180
SN - 9781612841670
T3 - Proceedings of the 2011 14th European Conference on Power Electronics and Applications, EPE 2011
BT - Proceedings of the 2011 14th European Conference on Power Electronics and Applications, EPE 2011
T2 - 2011 14th European Conference on Power Electronics and Applications, EPE 2011
Y2 - 30 August 2011 through 1 September 2011
ER -
