Research output per year
Research output per year
Yonghao Gui, Frede Blaabjerg, Xiongfei Wang, Jan Dimon Bendtsen, Dongsheng Yang, Jakob Stoustrup
Research output: Contribution to journal › Journal article › Research › peer-review
In this article, an improved dc-link voltage regulation strategy is proposed for grid-connected converters applied in dc microgrids. For the inner loop of the grid-connected converter, a voltage modulated direct power control is employed to obtain two second-order linear time-invariant systems, which guarantees that the closed-loop system is globally exponentially stable. For the outer loop, a sliding mode control strategy with a load current sensor is employed to maintain a constant dc-link voltage even in the presence of constant power loads at the dc-side, which adversely affect the system stability. Furthermore, an observer for the dc-link current is designed to remove the dc current sensor at the same time improving the reliability and decreasing the cost. From both simulation and experimental results obtained from a 15-kVA prototype setup, the proposed method is demonstrated to improve the transient performance of the system and has robustness properties to handle parameter mismatches compared with the input-output linearization method.
Original language | English |
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Article number | 9080581 |
Journal | I E E E Transactions on Industrial Electronics |
Volume | 68 |
Issue number | 6 |
Pages (from-to) | 4977-4987 |
Number of pages | 11 |
ISSN | 0278-0046 |
DOIs | |
Publication status | Published - Jun 2021 |
Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review