A Model-Based Dead-Band Compensation for the Dual-Active-Bridge Isolated Bidirectional DC-DC Converter

作者：Bai Hua^*; Nie Ziling; Mi Chris Chunting

来源：IEEJ Transactions on Electrical and Electronic Engineering, 2011, 6(6): 517-524.

DOI：10.1002/tee.20690

• dead-band
• DC-DC converter
• phase-shift
• PI controller
• short timescale

The dual active bridge (DAB)-based isolated bidirectional converter has been used to realize bidirectional energy flow while offering needed isolation between the primary and secondary side: for example, the battery side and grid side of one plug-in hybrid electric vehicle (PHEV). Even though the operation of a DAB-based DC-DC converter is straightforward, various transient processes exist, such as the dead-band effect, which deeply affects the dynamic performance of the converter in real world applications. Compensation of this effect is not easy because of the strong nonlinearity of the entire system. This paper quantitatively analyzed the dead-band effect at different output powers, and presented a model-based controller to realize the nonlinear dead-band compensation strategy, which can effectively mitigate demerits of the traditional PI-based control strategy. The proposed control algorithm is validated through theoretical simulation and experimental results.

• 出版日期2011-11