Title :
A power electronic transformer (PET) with multiport bidirectional resonant DC-DC converters for electric traction applications
Author :
Chunyang Gu ; Zedong Zheng ; Yongdong Li
Author_Institution :
Tsinghua Univ., Beijing, China
Abstract :
A novel power electronic transformer (PET) topology with multiport bidirectional resonant DC-DC converters is proposed where several medium-frequency multi-winding transformers is applied to realize the isolation. The topology is with high power density as well as high efficiency, which is a appropriate solution for electric tracton application like locomotives and high speed EMU trains. The power balancing could be realized by common flux linkage of the transformer, so that the load of the PET ports can be different from each other. Three control strategies of the multiport bidirectional LLC resonant DC-DC converters are proposed for either independent and paralleled secondary DC links with small LC parameter difference. Simulation and experimental results are given to validate the proposed topology and control strategies.
Keywords :
DC-DC power convertors; couplings; magnetic flux; power electronics; power transformers; resonant power convertors; traction; transformer windings; PET topology; common flux linkage; electric tracton application; medium-frequency multiwinding transformer; multiport bidirectional LLC resonant DC-DC converter control strategy; paralleled secondary DC links; power electronic transformer topology; small LC parameter difference; DC-DC power converters; Generators; Inverters; Regulators; Traction motors; Voltage control; Zinc;
Conference_Titel :
Transportation Electrification Conference and Expo (ITEC), 2015 IEEE
Conference_Location :
Dearborn, MI
DOI :
10.1109/ITEC.2015.7165742
