TY - GEN
T1 - Neutral-Point Voltage Balancing Control of Active NPC Converter for the High-Power Flywheel Energy Storage System
AU - Chen, Junliang
AU - Zeng, Zeming
AU - Gao, Congzhe
AU - Zhang, Dahui
AU - Wang, Ziwei
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Renewable energy is connected to the grid on a large scale, and the frequency stability of the grid is reduced. The high-power flywheel energy storage system (FESS) can reduce the power fluctuation of renewable energy and improve the frequency stability of power grid. The three-level (3L) active neutral point clamped (ANPC) voltage-source converter is widely used in high-power medium-voltage applications. But, the neutral point (NP) voltage unbalance has always been a disadvantage of this topology. This paper analyzes the principle of the back-to-back ANPC converter in the high-power flywheel energy storage system, studied the NP voltage fluctuation problem of the back-to-back ANPC converter. Then aiming at the problem of the NP voltage fluctuation, an algorithm based on small vector coefficient adjustment of capacitor voltage difference is designed. Finally, the effectiveness of the NP voltage balancing algorithm is verified in the simulation and experiments.
AB - Renewable energy is connected to the grid on a large scale, and the frequency stability of the grid is reduced. The high-power flywheel energy storage system (FESS) can reduce the power fluctuation of renewable energy and improve the frequency stability of power grid. The three-level (3L) active neutral point clamped (ANPC) voltage-source converter is widely used in high-power medium-voltage applications. But, the neutral point (NP) voltage unbalance has always been a disadvantage of this topology. This paper analyzes the principle of the back-to-back ANPC converter in the high-power flywheel energy storage system, studied the NP voltage fluctuation problem of the back-to-back ANPC converter. Then aiming at the problem of the NP voltage fluctuation, an algorithm based on small vector coefficient adjustment of capacitor voltage difference is designed. Finally, the effectiveness of the NP voltage balancing algorithm is verified in the simulation and experiments.
KW - active neutral point clamped converter(ANPC)
KW - flywheel energy storage system
KW - neutral point voltage control
UR - http://www.scopus.com/inward/record.url?scp=85182319835&partnerID=8YFLogxK
U2 - 10.1109/ICEMS59686.2023.10344994
DO - 10.1109/ICEMS59686.2023.10344994
M3 - Conference contribution
AN - SCOPUS:85182319835
T3 - 2023 26th International Conference on Electrical Machines and Systems, ICEMS 2023
SP - 4743
EP - 4748
BT - 2023 26th International Conference on Electrical Machines and Systems, ICEMS 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 26th International Conference on Electrical Machines and Systems, ICEMS 2023
Y2 - 5 November 2023 through 8 November 2023
ER -
