Loading [MathJax]/extensions/TeX/cancel.js
An Active Damping Strategy for Input Impedance of Bidirectional Dual Active Bridge DC–DC Converter: Modeling, Shaping, Design, and Experiment | IEEE Journals & Magazine | IEEE Xplore

An Active Damping Strategy for Input Impedance of Bidirectional Dual Active Bridge DC–DC Converter: Modeling, Shaping, Design, and Experiment

Publisher: IEEE

Abstract:

The dual-active-bridge (DAB) converter is applied for power transmission and voltage conversion in dc power grid. To improve the quality of input current, an input LC fil...View more

Abstract:

The dual-active-bridge (DAB) converter is applied for power transmission and voltage conversion in dc power grid. To improve the quality of input current, an input LC filter is cascaded to DAB converter. However, due to the interaction between LC filter and DAB converter, substantial oscillation and instability occur, leading to the excessive electromagnetic interference, large voltage ripple, and power loss and even operation failure. To solve this issue, an active damping strategy is proposed in this article to reshape the small-signal input impedance by parallel virtual impedance. The input voltage is regarded as a control objective, as well as the output voltage, therefore, a triple-closed-loop control structure is established. Besides, all dynamics of controllers are considered for the input impedance modeling of DAB converter. Moreover, compared with traditional methods, an active damping method for cascaded DAB converter with LC filter is adopted to design the virtual impedance and controller, suppressing resonance of LC filter and achieve a larger bandwidth. Therefore, a more stable and rapid dynamics cascaded system composed of DAB converter and LC filter are achieved. Finally, a prototype is set up and the effectiveness and superiority of proposed strategy are verified by experiments.
Published in: IEEE Transactions on Industrial Electronics ( Volume: 68, Issue: 2, February 2021)
Page(s): 1263 - 1274
Date of Publication: 29 January 2020

ISSN Information:

Publisher: IEEE

Funding Agency:


References

References is not available for this document.