This paper proposes a frequency-smoothing scheme of a doubly-fed induction generator (DFIG) that can significantly eliminate the frequency fluctuations caused by continuously fluctuating wind speeds. To achieve this, a proportional-integral (PI) control loop depending on the frequency deviation instead of a proportional control loop used in conventional schemes is added to the maximum power point tracking loop. The P control loop in the proposed frequency-smoothing scheme eliminates the alternating component in the frequency deviation, whereas the I control loop eliminates the slowly-varying component. The gains for the P control loop and I control loop are suggested for effectively using the rotating masses of a DFIG while avoiding over-deceleration of the rotor speed. The simulation results evidently demonstrate that the proposed scheme nearly removes the frequency deviation under various wind conditions, by using the proposed PI control loop, especially in high penetration levels of wind.
|Number of pages||9|
|Journal||IEEE Transactions on Sustainable Energy|
|Publication status||Published - 2021 Jul|
Bibliographical noteFunding Information:
Manuscript received July 6, 2020; revised November 15, 2020 and January 31, 2021; accepted March 1, 2021. Date of publication March 17, 2021; date of current version June 21, 2021. This work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education under Grant 2019R1A6A1A03032119. Paper no. TSTE-00741-2020. (Corresponding author: Yong Cheol Kang.) Hyungseon Jeon, Yong Cheol Kang, and Jung-Wook Park are with Yon-sei University, Seoul 03722, South Korea (e-mail: email@example.com; firstname.lastname@example.org; email@example.com).
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment