Modelling and Control of Dual Active Bridge DC-DC Converters in DC Grids

This paper investigates the stability of cascaded Dual Active Bridge (DAB) DC/DC converters operating under a range of conditions. The multi-DAB converter's reduced-order small signal models are formulated, and outer voltage and inner current loop controls are designed for each DAB converter. T...

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Bibliographic Details
Published in2023 IEEE PES Innovative Smart Grid Technologies - Asia (ISGT Asia) pp. 1 - 5
Main Authors Adiyabazar, Choidorj, Schipper, Josh, Watson, Jeremy, Wood, Alan
Format Conference Proceeding
LanguageEnglish
Published IEEE 21.11.2023
Subjects
Analytical models
Asia
Bridge circuits
control design
Inductance
Multi dual active bridge converter
Power transmission lines
reduced order model
Sensitivity analysis
state space model
System dynamics
time-domain validation
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Summary:This paper investigates the stability of cascaded Dual Active Bridge (DAB) DC/DC converters operating under a range of conditions. The multi-DAB converter's reduced-order small signal models are formulated, and outer voltage and inner current loop controls are designed for each DAB converter. The performance of the proposed reduced-order model with the proposed control was validated via PSCAD/EMTDC simulation. These are used to predict the dynamics of the two DAB converters connected through a transmission line for different parameter values. Using sensitivity analysis, the impact of the transmission line inductance on the dynamic performance of the multi-DAB converter is investigated.
ISSN:2378-8542
DOI:10.1109/ISGTAsia54891.2023.10372767