Impact Factor:5.2
DOI number:10.1109/TCSI.2024.3523196
Journal:IEEE Transactions on Circuits and Systems I： Regular Papers
Key Words:Voltage control, feedforward, sampling rates, harmonic stability, impedance shaping
Abstract:Grid-forming converters have demonstrated their ability to enhance the operation of renewable energy resources by providing essential grid voltage and frequency support. However, control delays can cause the output impedance of the converter having a negative-resistance region, which potentially leads to high-frequency instability in voltage control. While passivity-based design is typically employed to shape the output impedance, aspects such as ease of implementation, robustness, and constraints related to LC-filter design have not been fully explored. To address this gap, this paper examines four feedforward damping methods with varying sampling rates, ultimately recommending sixteen-sampling capacitor voltage feedforward as the optimal approach. The effectiveness of proposed approach is validated through experiments, with grid current feedforward used as a benchmark for comparison.
Indexed by:Journal paper
Discipline:Engineering
Document Type:J
ISSN No.:1558-0806
Translation or Not:no
Date of Publication:2025-01-01
Included Journals:SCI
Links to published journals:https://ieeexplore.ieee.org/document/10819995