TY - GEN
T1 - Effects of Imbalances and Nonlinear Loads on the Voltage Balance of a Neutral-Point-Clamped Inverter
AU - Pou, Josep
AU - Boroyevich, Dushan
AU - Pindado, Rafael
PY - 2003
Y1 - 2003
N2 - The effects of linear imbalances and nonlinear loads on the voltage balance of the neutral-point-clamped converter are described in this paper. The study reveals that a negative sequence of output currents (linear imbalance) may produce additional low-frequency oscillations to the neutral-point voltage. Similar consequences are produced by odd-order current harmonics from a nonlinear load, while even-order harmonics can cause the neutral-point voltage to shift. Furthermore, the second, fourth and eighth output current harmonics might produce instability to the neutral-point voltage. The second and fourth harmonics are the worst components. The maximum amplitudes of these harmonics superposed to the current fundamentals that the system can tolerate are described. Simulated and experimental examples are presented. ©2003 IEEE
AB - The effects of linear imbalances and nonlinear loads on the voltage balance of the neutral-point-clamped converter are described in this paper. The study reveals that a negative sequence of output currents (linear imbalance) may produce additional low-frequency oscillations to the neutral-point voltage. Similar consequences are produced by odd-order current harmonics from a nonlinear load, while even-order harmonics can cause the neutral-point voltage to shift. Furthermore, the second, fourth and eighth output current harmonics might produce instability to the neutral-point voltage. The second and fourth harmonics are the worst components. The maximum amplitudes of these harmonics superposed to the current fundamentals that the system can tolerate are described. Simulated and experimental examples are presented. ©2003 IEEE
KW - Linear imbalances
KW - Multilevel inverter
KW - Nearest vectors
KW - Neutral-point balance
KW - Neutral-point-clamped inverter
KW - Nonlinear loads
KW - Space-vector modulation
KW - Three-level inverter
UR - https://www.scopus.com/pages/publications/0042659456
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-0042659456&origin=recordpage
U2 - 10.1109/PESC.2003.1218273
DO - 10.1109/PESC.2003.1218273
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 0-7803-7754-0
VL - 1
T3 - PESC Record - IEEE Annual Power Electronics Specialists Conference
SP - 53
EP - 58
BT - 2003 IEEE 34th Annual Power Electronics Specialists Conference - PESC '03
CY - United States
T2 - IEEE 34th Annual Power Electronics Specialists Conference (PESC'03)
Y2 - 15 June 2003 through 19 June 2003
ER -