Impact Factor:5.697
DOI number:10.1109/TPEL.2022.3218378
Journal:IEEE Transactions on Power Electronics
Key Words:Dissipation, grid-side current control, grid voltage feedforward, LCL-filter parameter deviation, multisampling pulsewidth modulation (PWM)
Abstract:Capacitor current active damping is a common method to achieve dissipation for LCL -filtered grid-connected converters using grid-side current control. However, the dissipative characteristic of converter output admittance near the critical frequency can easily be jeopardized by the filter parameter deviation. Besides, the grid voltage feedforward is often overlooked when designing dissipativity, which is, however, preferred to improve transient performance. To tackle these challenges, a multisampled current control scheme is proposed in this article. By combining the capacitor current active damping and the capacitor voltage feedforward, not only the dissipation can be achieved below the Nyquist frequency but also the dissipativity robustness against the filter parameter deviation is enhanced. Besides, the LCL -filter resonant frequency can be designed near the critical frequency, which simplifies the internal stability design. Finally, the effectiveness of the proposed method is verified through the experiments.
Indexed by:Journal paper
Discipline:Engineering
Document Type:J
Volume:38
Issue:3
Page Number:3992-4004
ISSN No.:0885-8993
Translation or Not:no
Date of Publication:2022-10-31
Included Journals:SCI
Links to published journals:https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=63