Transient analysis of dual active bridges under short circuit at load side

Yirong Su; Fuhu Lv; Huamin Liang; Weixiao Xiong

doi:10.1117/12.2611046

14 October 2021 Transient analysis of dual active bridges under short circuit at load side

Yirong Su, Fuhu Lv, Huamin Liang, Weixiao Xiong

Proceedings Volume 11930, International Conference on Mechanical Engineering, Measurement Control, and Instrumentation; 119302U (2021) https://doi.org/10.1117/12.2611046
Event: International Conference on Mechanical Engineering, Measurement Control, and Instrumentation (MEMCI 2021), 2021, Guangzhou, China

Abstract

In this paper, the transient process of double active bridge DC converter under output short circuit fault is analyzed. The internal and external circuits are decoupled by time-domain analysis method, the current and voltage transient quantities of DAB after short-circuit fault are derived in different modes, the overcurrent phenomenon in the transient process is demonstrated, and the most serious overcurrent risk is pointed out. By analyzing the transient process, this paper proposes a method to realize DAB short-circuit fault crossing by series inductance at the output end, and deduces the range of series inductance value, so as to identify short-circuit fault characteristics on the premise of no overcurrent in the circuit. In this paper, a 50kW DAB simulation model is built and verified through MATLAB/Simulink. The simulation and experimental results verify the correctness of the analysis results and the proposed method.

Citation Download Citation

Yirong Su, Fuhu Lv, Huamin Liang, and Weixiao Xiong "Transient analysis of dual active bridges under short circuit at load side", Proc. SPIE 11930, International Conference on Mechanical Engineering, Measurement Control, and Instrumentation, 119302U (14 October 2021); https://doi.org/10.1117/12.2611046

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