TY - GEN
T1 - Amplitude control of the neutral-point voltage oscillations in the three-level converter
AU - Zaragoza, J.
AU - Pou, J.
AU - Arias, A.
AU - Ceballos, S.
AU - Robles, E.
AU - Ibáñez, P.
AU - Gabiola, I.
PY - 2008
Y1 - 2008
N2 - This paper presents a control method to regulate the amplitude of the voltage oscillations that appear in the neutral-point of the three-level diode-clamped converter for some operating conditions. The control is applied to the hybrid modulation technique, which is based on combining two modulation techniques. One of them is based on two modulation signals per phase, and can remove completely the low-frequency voltage oscillations on the neutral point. However, such a modulation strategy has an important drawback; it increases significantly switching losses on the converter. The hybrid modulation used here combines such a modulation with sinusoidal PWM. The main characteristic of this hybrid modulation is the capacity to reduce switching losses at the cost of having some low-frequency voltage oscillations on the neutral point. The amplitude of these oscillations can be regulated thanks to the proposed controller, which defines the exact degree of mixture between the two modulation strategies. Some simulation and experimental results are presented in this paper.
AB - This paper presents a control method to regulate the amplitude of the voltage oscillations that appear in the neutral-point of the three-level diode-clamped converter for some operating conditions. The control is applied to the hybrid modulation technique, which is based on combining two modulation techniques. One of them is based on two modulation signals per phase, and can remove completely the low-frequency voltage oscillations on the neutral point. However, such a modulation strategy has an important drawback; it increases significantly switching losses on the converter. The hybrid modulation used here combines such a modulation with sinusoidal PWM. The main characteristic of this hybrid modulation is the capacity to reduce switching losses at the cost of having some low-frequency voltage oscillations on the neutral point. The amplitude of these oscillations can be regulated thanks to the proposed controller, which defines the exact degree of mixture between the two modulation strategies. Some simulation and experimental results are presented in this paper.
UR - http://www.scopus.com/inward/record.url?scp=52349096920&partnerID=8YFLogxK
U2 - 10.1109/PESC.2008.4592312
DO - 10.1109/PESC.2008.4592312
M3 - Conference contribution
AN - SCOPUS:52349096920
SN - 9781424416684
T3 - PESC Record - IEEE Annual Power Electronics Specialists Conference
SP - 2473
EP - 2477
BT - PESC '08 - 39th IEEE Annual Power Electronics Specialists Conference - Proceedings
T2 - PESC '08 - 39th IEEE Annual Power Electronics Specialists Conference
Y2 - 15 June 2008 through 19 June 2008
ER -