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- W4310450849 abstract "In grid-forming (GFM) converters with regulated dc-link dynamics, the dc-link voltage control can directly generate the frequency that is used for synchronizing GFM converters with the grid. However, this synchronization method suffers from low-frequency oscillations (LFO). To tackle this challenge, this paper proposes a flexible synchronization control scheme for grid-forming converters. In the approach, the dc-link voltage control, the active power feedforward control, and the q-axis voltage feedforward control loops are connected in parallel for the synchronization purpose. It is found that both the active power feedforward and the q-axis voltage feedforward loops can dampen the LFO. Yet, the active power feedforward loop with different controllers induces additional synchronous- or low-frequency instability issues, whereas the q-axis voltage feedforward loop does not have such adverse effect. Therefore, the paralleled dc-link voltage and q-axis voltage feedforward control-based synchronization scheme is recommended. Experimental tests of GFM converters with different grid impedances are performed. The results confirm the effectiveness of theoretical analysis and of the proposed control approach." @default.
- W4310450849 created "2022-12-10" @default.
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- W4310450849 date "2022-10-09" @default.
- W4310450849 modified "2023-09-27" @default.
- W4310450849 title "Flexible Synchronization Control for Grid-Forming Converters with Regulated DC-Link Dynamics" @default.
- W4310450849 doi "https://doi.org/10.1109/ecce50734.2022.9947855" @default.
- W4310450849 hasPublicationYear "2022" @default.
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