TY - GEN
T1 - Power electronic transformer based on LLC resonant converter
AU - Chen, Qichao
AU - Pan, Yanlin
AU - Ji, Yanchao
AU - Wang, Jianze
AU - Yang, Nan
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/10/20
Y1 - 2014/10/20
N2 - A three-stage buck power electronic transformer (PET) topology based on the LLC resonant converter is proposed. In the proposed PET, the high voltage stage on the input side is a diode-clamped three-level rectifier used in reducing the voltage withstanding grade of switching devices. The isolation stage adopts a three-level LLC series resonant DC-DC converter, the voltage stress of each whose main switches is half the input voltage. It can realize soft-switching from no-load to full load, which will reduce losses and improve efficiency. The low voltage stage on the output side is a two-level three-phase four-leg inverter coping with the huge imbalance and nonlinear loads. A control scheme is designed and simulation is performed to verify the performance of the proposed PET. Simulation results show that the proposed PET not only has the basic features of isolation, voltage transformation and energy transmission as does the traditional transformer, but also carries out the power quality regulating function, which can avoid the mutual influence between system and load due to imbalance and distortion.
AB - A three-stage buck power electronic transformer (PET) topology based on the LLC resonant converter is proposed. In the proposed PET, the high voltage stage on the input side is a diode-clamped three-level rectifier used in reducing the voltage withstanding grade of switching devices. The isolation stage adopts a three-level LLC series resonant DC-DC converter, the voltage stress of each whose main switches is half the input voltage. It can realize soft-switching from no-load to full load, which will reduce losses and improve efficiency. The low voltage stage on the output side is a two-level three-phase four-leg inverter coping with the huge imbalance and nonlinear loads. A control scheme is designed and simulation is performed to verify the performance of the proposed PET. Simulation results show that the proposed PET not only has the basic features of isolation, voltage transformation and energy transmission as does the traditional transformer, but also carries out the power quality regulating function, which can avoid the mutual influence between system and load due to imbalance and distortion.
KW - LLC resonant converter
KW - double closed loop control
KW - power electronic transformer
KW - three-stage
UR - https://www.scopus.com/pages/publications/84912124395
U2 - 10.1109/ICIEA.2014.6931414
DO - 10.1109/ICIEA.2014.6931414
M3 - 会议稿件
AN - SCOPUS:84912124395
T3 - Proceedings of the 2014 9th IEEE Conference on Industrial Electronics and Applications, ICIEA 2014
SP - 1543
EP - 1548
BT - Proceedings of the 2014 9th IEEE Conference on Industrial Electronics and Applications, ICIEA 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 9th IEEE Conference on Industrial Electronics and Applications, ICIEA 2014
Y2 - 9 June 2014 through 11 June 2014
ER -