TY - GEN
T1 - Fault-tolerant multilevel converter topology
AU - Ceballos, Salvador
AU - Pou, Josep
AU - Gabiola, Igor
AU - Villate, José Luis
AU - Zaragoza, Jordi
AU - Boroyevich, Dushan
PY - 2006
Y1 - 2006
N2 - This paper presents a modified topology of the neutral-point-clamped converter. The main change consists on adding a fourth leg, which is based on the flying-capacitor converter structure. The aim of this additional leg is to provide fault tolerance to the converter. Furthermore, during normal operation mode, this leg is able to provide a stiff neutral voltage. Consequently, the low-frequency voltage oscillations that appear in the neutral point of the standard three-level topology for some operation conditions no longer exist. As a result, the modulation strategy of the three main legs of the converter does not have to take care of voltage balance, and it can be design to achieve optimal output voltage waveforms, as well as to improve efficiency of the converter. Some simulation results are presented to show viability of this approach under both, normal operation mode and fault event. Experimental results are expected to include in the final paper.
AB - This paper presents a modified topology of the neutral-point-clamped converter. The main change consists on adding a fourth leg, which is based on the flying-capacitor converter structure. The aim of this additional leg is to provide fault tolerance to the converter. Furthermore, during normal operation mode, this leg is able to provide a stiff neutral voltage. Consequently, the low-frequency voltage oscillations that appear in the neutral point of the standard three-level topology for some operation conditions no longer exist. As a result, the modulation strategy of the three main legs of the converter does not have to take care of voltage balance, and it can be design to achieve optimal output voltage waveforms, as well as to improve efficiency of the converter. Some simulation results are presented to show viability of this approach under both, normal operation mode and fault event. Experimental results are expected to include in the final paper.
KW - Fault tolerance
KW - Multilevel converter
KW - Neutralpoint-clamped (NPC) converter
KW - Reliability
KW - Voltage oscillation
UR - http://www.scopus.com/inward/record.url?scp=46649089073&partnerID=8YFLogxK
U2 - 10.1109/ISIE.2006.295707
DO - 10.1109/ISIE.2006.295707
M3 - Conference contribution
AN - SCOPUS:46649089073
SN - 1424404975
SN - 9781424404971
T3 - IEEE International Symposium on Industrial Electronics
SP - 1577
EP - 1582
BT - International Symposium on Industrial Electronics 2006, ISIE 2006
T2 - International Symposium on Industrial Electronics 2006, ISIE 2006
Y2 - 9 July 2006 through 13 July 2006
ER -