Fast transient control for power adjustment in a dual-active-bridge converter

• Published in: Electronics letters Vol. 53; no. 16; pp. 1130 - 1132
• Main Authors: Lin, S.-T, Li, X, Sun, C, Tang, Y
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 03.08.2017
• Subjects: control variables; current overshoot elimination; DAB DC‐DC converter; DC‐DC power convertors; dual‐active‐bridge converter; fast transient control; gating signals; high‐current overshoot; nonzero DC‐bias current; phase‐shifts; power adjustment; Power electronics, energy conversion and sustainability; universal expression; power adjustment; nonzero DC-bias current; gating signals; control variables; current overshoot elimination; universal expression; high-current overshoot; phase-shifts; dual-active-bridge converter; fast transient control; DC-DC power convertors; DAB DC-DC converter
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2017.1662

A transient control for a dual-active-bridge (DAB) dc/dc converter to realise power adjustment in a fast and smooth way is proposed. The converter is able to transfer power between two dc sources with two phase-shifts as control variables. To eliminate the possible high-current overshoot and non-zero dc-bias current, the adjustments of the two phase-shifts are distributed to the gating signals of different switch arms according to a ratio x, which has an universal expression for any transitions among different operation modes in a DAB converter. Experimental results have proved the validity of the proposed transient control in elimination of current overshoot and dc-bias current.