Publikationer pr. år
Publikationer pr. år
Yonghao Gui, Frede Blaabjerg, Xiongfei Wang, Jan Dimon Bendtsen, Dongsheng Yang, Jakob Stoustrup
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › 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.
Originalsprog | Engelsk |
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Artikelnummer | 9080581 |
Tidsskrift | I E E E Transactions on Industrial Electronics |
Vol/bind | 68 |
Udgave nummer | 6 |
Sider (fra-til) | 4977-4987 |
Antal sider | 11 |
ISSN | 0278-0046 |
DOI | |
Status | Udgivet - jun. 2021 |
Publikation: Bidrag til bog/antologi/rapport/konference proceeding › Konferenceartikel i proceeding › Forskning › peer review