TY - GEN
T1 - Scalar modulation technique applied to a three-level/-phase/-wire back-to-back converter system with reduced dc-link capacitance for AC drives
AU - Moia, Joabel
AU - Heldwein, Marcelo Lobo
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/6/16
Y1 - 2015/6/16
N2 - This work introduces a novel modulation technique applied to a three-level/-phase/-wire back-to-back NPC converter system focusing on reduced dc-link capacitance applications. The technique is implemented within a scalar PWM modulation scheme and is based on the mathematical analysis of the back-to-back NPC system in the αβ0 stationary reference frame. There, the ac-side currents and the modulation signals α and β components from both converters are used to obtain the required 0-axis modulation signal to be employed in the grid-side converter. This ensures that the dc-link center point low frequency current components are canceled out and, thus, that the required dc-link capacitors requirements are lowered. The main consequence of this is the possibility of replacing, for instance, electrolytic capacitors by film capacitors in order to increase reliability, keeping the functionality, performance, volume, weight and cost of the system, while reducing capacitors losses.
AB - This work introduces a novel modulation technique applied to a three-level/-phase/-wire back-to-back NPC converter system focusing on reduced dc-link capacitance applications. The technique is implemented within a scalar PWM modulation scheme and is based on the mathematical analysis of the back-to-back NPC system in the αβ0 stationary reference frame. There, the ac-side currents and the modulation signals α and β components from both converters are used to obtain the required 0-axis modulation signal to be employed in the grid-side converter. This ensures that the dc-link center point low frequency current components are canceled out and, thus, that the required dc-link capacitors requirements are lowered. The main consequence of this is the possibility of replacing, for instance, electrolytic capacitors by film capacitors in order to increase reliability, keeping the functionality, performance, volume, weight and cost of the system, while reducing capacitors losses.
KW - ac drives
KW - back-to-back converters
KW - neutral point current
KW - stationary frame analysis
KW - three-level NPC
UR - http://www.scopus.com/inward/record.url?scp=84937689857&partnerID=8YFLogxK
U2 - 10.1109/ICIT.2015.7125555
DO - 10.1109/ICIT.2015.7125555
M3 - Conference contribution
AN - SCOPUS:84937689857
T3 - Proceedings of the IEEE International Conference on Industrial Technology
SP - 3091
EP - 3098
BT - 2015 IEEE International Conference on Industrial Technology, ICIT 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2015 IEEE International Conference on Industrial Technology, ICIT 2015
Y2 - 17 March 2015 through 19 March 2015
ER -