TY - GEN
T1 - DC-bus voltage balancing for three-level NPC inverter using deadbeat controller
AU - Cai, Xinbo
AU - Zhang, Zhenbin
AU - Chen, Zhe
AU - Kennel, Ralph
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/7/13
Y1 - 2016/7/13
N2 - A new DC-bus voltage balancing method using the deadbeat control concept for three-level neutral-point clamped power converters (3L-NPCs) is proposed and experimentally verified in this work. Within this paper, we firstly derived a model of the instant neutral point current, with which, the average model of the neutral point current is obtained. This average model allows us to calculate neutral point current within one sample interval. Based on a well-known model of the DC-bus voltage and the developed average neutral-point current model, a deadbeat controller dealing with the DC-bus balancing control is designed and incorporated into a space vector modulation (SVM) method, which allows to adjust the neutral-point current continuously. The novelty of the proposed method is that, a good DC-bus voltage balancing control can be assured, at a any load condition and any output voltage of the converter, while the normal functionality (phase voltage and current output) of a 3L-NPC remains, which have been proofed with both simulation and experimental data. The experimental data also shows that good dynamics of the dc-bus voltage adjusting and low neutral point voltage ripples can be achieved with such solution.
AB - A new DC-bus voltage balancing method using the deadbeat control concept for three-level neutral-point clamped power converters (3L-NPCs) is proposed and experimentally verified in this work. Within this paper, we firstly derived a model of the instant neutral point current, with which, the average model of the neutral point current is obtained. This average model allows us to calculate neutral point current within one sample interval. Based on a well-known model of the DC-bus voltage and the developed average neutral-point current model, a deadbeat controller dealing with the DC-bus balancing control is designed and incorporated into a space vector modulation (SVM) method, which allows to adjust the neutral-point current continuously. The novelty of the proposed method is that, a good DC-bus voltage balancing control can be assured, at a any load condition and any output voltage of the converter, while the normal functionality (phase voltage and current output) of a 3L-NPC remains, which have been proofed with both simulation and experimental data. The experimental data also shows that good dynamics of the dc-bus voltage adjusting and low neutral point voltage ripples can be achieved with such solution.
KW - Neutral-Point-Clamped (NPC) inverter
KW - deadbeat control
KW - neutral-point voltage balance control
KW - three-level space vector modulation
UR - http://www.scopus.com/inward/record.url?scp=84983262264&partnerID=8YFLogxK
U2 - 10.1109/IPEMC.2016.7512336
DO - 10.1109/IPEMC.2016.7512336
M3 - Conference contribution
AN - SCOPUS:84983262264
T3 - 2016 IEEE 8th International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016
SP - 496
EP - 501
BT - 2016 IEEE 8th International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 8th IEEE International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016
Y2 - 22 May 2016 through 26 May 2016
ER -