TY - GEN
T1 - A Neutral-Point-Potential Balancing Strategy of Three-Level NPC Inverters by Injecting Absolute Value of Modulation Signal
AU - Yu, Deshuo
AU - Li, Yuguo
AU - Yi, Hao
AU - Zhuo, Fang
AU - Wang, Zhenxiong
AU - Xie, Yihan
N1 - Publisher Copyright:
© 2023 The Korean Institute of Power Electronics.
PY - 2023
Y1 - 2023
N2 - This paper presents a strategy for neutral potential (NPP) balancing in a three-level neutral point clamped (NPC) inverter by injecting the absolute value of the modulating signal. The injection involves the zero-sequence component and the 2nd harmonic component. When the power factor is large, the injected zero-sequence component maintains the balance of the neutral potential on the DC side. Besides, the injection of the 2nd harmonic component also achieves the objective of NPP balancing and the control effect is independent of the power factor. The analysis shows that when an absolute value of the modulating signal is injected, both the zero-sequence and the 2nd harmonic component lead to voltage balancing of the DC side and can be scaled adaptively to the path as the power factor changes. The NPP balancing strategy is verified by simulation from the voltage balancing effect and adaptive reduction of harmonic components.
AB - This paper presents a strategy for neutral potential (NPP) balancing in a three-level neutral point clamped (NPC) inverter by injecting the absolute value of the modulating signal. The injection involves the zero-sequence component and the 2nd harmonic component. When the power factor is large, the injected zero-sequence component maintains the balance of the neutral potential on the DC side. Besides, the injection of the 2nd harmonic component also achieves the objective of NPP balancing and the control effect is independent of the power factor. The analysis shows that when an absolute value of the modulating signal is injected, both the zero-sequence and the 2nd harmonic component lead to voltage balancing of the DC side and can be scaled adaptively to the path as the power factor changes. The NPP balancing strategy is verified by simulation from the voltage balancing effect and adaptive reduction of harmonic components.
KW - Balancing control
KW - neutral-point-clamped inverter
KW - pulse width modulation
UR - https://www.scopus.com/pages/publications/85170648942
U2 - 10.23919/ICPE2023-ECCEAsia54778.2023.10213844
DO - 10.23919/ICPE2023-ECCEAsia54778.2023.10213844
M3 - 会议稿件
AN - SCOPUS:85170648942
T3 - ICPE 2023-ECCE Asia - 11th International Conference on Power Electronics - ECCE Asia: Green World with Power Electronics
SP - 549
EP - 554
BT - ICPE 2023-ECCE Asia - 11th International Conference on Power Electronics - ECCE Asia
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 11th International Conference on Power Electronics - ECCE Asia, ICPE 2023-ECCE Asia
Y2 - 22 May 2023 through 25 May 2023
ER -