Novel decoupling control scheme for IPOP and IPOS modular DC–DC converters

Choul-Woo Jung; Duc Dung Le; Dong-Choon Lee

Novel decoupling control scheme for IPOP and IPOS modular DC–DC converters

Choul-Woo Jung

Duc Dung Le

Dong-Choon Lee

Vol. 21, No. 12, pp. 1793-1803, Dec. 2021

10.1007/s43236-021-00326-5

Decoupling control method

Dual active bridge (DAB) converter

Input current sharing

Modular power converters

Power Conversion

Abstract

This paper proposes a novel decoupling control scheme for input-parallel modular dual active bridge (DAB) DC–DC converters, where the input current sharing (ICS) control loops and output voltage regulation (OVR) control loop are completely decoupled. First, the input-parallel output-parallel and input-parallel output series systems of modular DAB converters are modeled based on the small-signal modelling of a DAB module. In general, coupling effects between the ICS and OVR control loops exist when the input currents and output voltage are employed as control variables. To eliminate this undesirable effect, the input current errors of DAB converters are introduced as new control variables. In this way, independent single-input single-output systems are obtained. Consequently, a uniform power distribution among all of the DAB modules is achieved in the transient state as well as the steady state, even in the case of parameter mismatch. The feasibility of the proposed control scheme has been verified by simulation and experimental results.

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Cite this article

[IEEE Style]

C. Jung, D. D. Le, D. Lee, "Novel decoupling control scheme for IPOP and IPOS modular DC–DC converters," Journal of Power Electronics, vol. 21, no. 12, pp. 1793-1803, 2021. DOI: 10.1007/s43236-021-00326-5.

[ACM Style]

Choul-Woo Jung, Duc Dung Le, and Dong-Choon Lee. 2021. Novel decoupling control scheme for IPOP and IPOS modular DC–DC converters. Journal of Power Electronics, 21, 12, (2021), 1793-1803. DOI: 10.1007/s43236-021-00326-5.