Abstract
In this article, the actions of the dual active bridge (DAB)-based three-phase single-stage ac-dc converter under the nonideal grid conditions and corresponding solution are researched for the first time. The average state-space model of the converter is built first. Then the effect of grid harmonics and unbalance on the three-phase grid current are analyzed and it reals the grid current harmonics, and unbalance is caused by the distorted grid. In order to solve this problem, a proportional-resonant (PR) + reduced parallel repetitive control closed-loop controller of grid current in the two-phase stationary frame is proposed. The parameter constraint and frequency-domain characteristics of the proposed compound controller are analyzed in detail. The detailed experimental results verify the correctness of the theoretical analysis and the feasibility of the proposed closed-loop controller.
| Original language | English |
|---|---|
| Pages (from-to) | 1192-1202 |
| Number of pages | 11 |
| Journal | IEEE Journal of Emerging and Selected Topics in Power Electronics |
| Volume | 10 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 Feb 2022 |
Keywords
- Closed-loop control
- current distortion
- single-stage isolated ac-dc converter
- three phase
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