| Autor: |
Rui Xie, Qingfa Zeng, Fei Yang, Bin Lin, Ouyang Xu, Yuanbin He |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
IEEE Access, Vol 12, Pp 21453-21463 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2169-3536 |
| DOI: |
10.1109/ACCESS.2024.3359456 |
| Popis: |
A digital controlled unipolar hysteresis current control strategy applied to the single-phase grid-connected inverter is studied in the paper. In view of the problem of current zero-crossing distortion in the traditional unipolar hysteresis current control based on finite state machines (FSM), a new unipolar hysteresis current control strategy based on current decoupling is proposed. By introducing a virtual zero-sequence current, the single-phase full-bridge inverter is decoupled into two independent half-bridge inverter units, which are controlled by two bipolar hysteresis current control loops under the constraints of a finite state machine. Therefore, the operation rules of the FSM ensure the frequency doubling output of the unipolar modulation, and the virtual two-phase decoupled current eliminates the zero-crossing distortion problem of inverter output current. Finally, the effectiveness and feasibility of the proposed method were verified by building a 1kW single-phase full-bridge grid-connected inverter in the laboratory. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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