TY - GEN
T1 - A Non-isolated Bidirectional Modular DC-DC Converter with Unipolarand Bipolar Structure for dc Networks Interconnection
AU - Sun, Lejia
AU - Zhuo, Fang
AU - Wang, Feng
AU - Yi, Hao
AU - Zhu, Yanlin
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/12/3
Y1 - 2018/12/3
N2 - In this paper, a novel bidirectional modular dc-dc converter (BMC) with unipolar and bipolar structure for dc networks interconnection is proposed. Compared with traditional dc grid-connecting converters, the proposed converter can realizes high voltage gain with a transformerless structure and reduce the voltage stress across switches. Then, to solve the unbalanced current problem among power units in the BMC, a submodular structure is introduced. The control system was optimized for grid-connection applications by introducing the phase-interval operation between submodules to reduce the current and voltage ripple in both sides. Besides, the control system can provide various control strategies, including output voltage control, voltage gain control and power control to maintain the voltage level or keep a constant voltage gain of the networks and performing precise power control. Finally, simulations of both sub-modular unipolar BMC and bipolar BMC were implemented, and a 1-kW experimental 3-level unipolar prototype was developed.
AB - In this paper, a novel bidirectional modular dc-dc converter (BMC) with unipolar and bipolar structure for dc networks interconnection is proposed. Compared with traditional dc grid-connecting converters, the proposed converter can realizes high voltage gain with a transformerless structure and reduce the voltage stress across switches. Then, to solve the unbalanced current problem among power units in the BMC, a submodular structure is introduced. The control system was optimized for grid-connection applications by introducing the phase-interval operation between submodules to reduce the current and voltage ripple in both sides. Besides, the control system can provide various control strategies, including output voltage control, voltage gain control and power control to maintain the voltage level or keep a constant voltage gain of the networks and performing precise power control. Finally, simulations of both sub-modular unipolar BMC and bipolar BMC were implemented, and a 1-kW experimental 3-level unipolar prototype was developed.
KW - Bidirectional
KW - Bipolar
KW - Modular
KW - Submodule
KW - Unipolar
UR - https://www.scopus.com/pages/publications/85060305870
U2 - 10.1109/ECCE.2018.8557543
DO - 10.1109/ECCE.2018.8557543
M3 - 会议稿件
AN - SCOPUS:85060305870
T3 - 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
SP - 1272
EP - 1278
BT - 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
Y2 - 23 September 2018 through 27 September 2018
ER -
