作者
Arjita Pal, Diptak Pal, Bijaya Ketan Panigrahi
发表日期
2022/11/10
期刊
IEEE Transactions on Circuits and Systems II: Express Briefs
卷号
70
期号
3
页码范围
1009-1013
出版商
IEEE
简介
This brief proposes a new current saturation strategy (CSS) for grid-forming (GFM) inverters to comply with the existing low-voltage ride-through (LVRT) capability requirements. The proposed control philosophy enables the GFM inverters to follow one of the standardized grid codes by limiting the output current during LVRT via a new control parameter, the power factor angle (PFA). First, a nonlinear mathematical model capturing the full-order averaged dynamics of a GFM inverter embedded with current limiting control has been developed. Following this, the proposed CSS has been analytically evaluated by developing a simplified equivalent circuit model. Finally, numerical and experimental results are presented to verify the accuracy of the CSS for assessing the large-signal stability of a GFM inverter subjected to severe symmetrical grid faults.
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A Pal, D Pal, BK Panigrahi - IEEE Transactions on Circuits and Systems II: Express …, 2022