During the low‐voltage ride‐through (LVRT) of the doubly fed induction generator (DFIG), the change rate of the stator flux is introduced as the feed‐forward compensation (FFC) to prevent the stator flux oscillation from affecting the rotor current control. The dual‐sequence FFC is proposed for the asymmetrical LVRT of the DFIG. To reduce the rotor voltage increase due to the FFC, the controllable resistive‐type fault current limiter (CRTFCL) is implemented at the stator side to improve damping to the stator flux oscillation. The resistance of the CRTFCL is controlled based on the ramp function to relieve oscillations resulted from the switch‐out of the CRTFCL. With the dual‐sequence FFC and CRTFCL applied to the asymmetrical LVRT, analytical expressions of the stator current, rotor current, and rotor voltage are derived. The accuracy of the analytical expressions and the improved LVRT performance with the dual‐sequence FFC and the CRTFCL are verified based on the time‐domain simulations. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

中文翻译：

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DFIG的非对称LVRT集成了前馈瞬态电流控制和可控电阻型故障限流器

在双馈感应发电机（DFIG）的低压穿越（LVRT）期间，引入定子磁通的变化率作为前馈补偿（FFC），以防止定子磁通振荡影响转子电流控制。针对DFIG的不对称LVRT，提出了双序列FFC。为了减少由于FFC引起的转子电压升高，在定子侧安装了可控电阻型故障电流限制器（CRTFCL），以改善对定子磁通振荡的阻尼。CRTFCL的电阻基于斜坡函数进行控制，以缓解因CRTFCL关闭而引起的振荡。通过将双序列FFC和CRTFCL应用于不对称LVRT，可以得出定子电流，转子电流和转子电压的解析表达式。基于时域仿真，验证了解析表达式的准确性以及使用双序列FFC和CRTFCL改进的LVRT性能。©2020日本电气工程师学会。由John Wiley＆Sons，Inc.发布