Power-Smoothing Scheme of a DFIG Using the Adaptive Gain Depending on the Rotor Speed and Frequency Deviation
In an electric power grid that has a high penetration level of wind, the power fluctuation of a large-scale wind power plant (WPP) caused by varying wind speeds deteriorates the system frequency regulation. This paper proposes a power-smoothing scheme of a doubly-fed induction generator (DFIG) that...
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doaj-95c6e93bb92a4bf9a6e5cb38f1d4b4742020-11-24T22:48:03ZengMDPI AGEnergies1996-10732017-04-0110455510.3390/en10040555en10040555Power-Smoothing Scheme of a DFIG Using the Adaptive Gain Depending on the Rotor Speed and Frequency DeviationHyewon Lee0Min Hwang1Eduard Muljadi2Poul Sørensen3Yong Cheol Kang4Department of Electrical Engineering and Wind Energy Grid-Adaptive Technology (WeGAT) Research Center, Chonbuk National University, Chonju 54896, KoreaDepartment of Electrical Engineering and Wind Energy Grid-Adaptive Technology (WeGAT) Research Center, Chonbuk National University, Chonju 54896, KoreaNational Renewable Energy Laboratory, Golden, CO 80401, USADepartment of Wind Energy, Technical University of Denmark, 4000 Roskilde, DenmarkDepartment of Electrical Engineering, WeGAT Research Center, and Smart Grid Research Center, Chonbuk National University, Chonju 54896, KoreaIn an electric power grid that has a high penetration level of wind, the power fluctuation of a large-scale wind power plant (WPP) caused by varying wind speeds deteriorates the system frequency regulation. This paper proposes a power-smoothing scheme of a doubly-fed induction generator (DFIG) that significantly mitigates the system frequency fluctuation while preventing over-deceleration of the rotor speed. The proposed scheme employs an additional control loop relying on the system frequency deviation that operates in combination with the maximum power point tracking control loop. To improve the power-smoothing capability while preventing over-deceleration of the rotor speed, the gain of the additional loop is modified with the rotor speed and frequency deviation. The gain is set to be high if the rotor speed and/or frequency deviation is large. The simulation results based on the IEEE 14-bus system clearly demonstrate that the proposed scheme significantly lessens the output power fluctuation of a WPP under various scenarios by modifying the gain with the rotor speed and frequency deviation, and thereby it can regulate the frequency deviation within a narrow range.http://www.mdpi.com/1996-1073/10/4/555power smoothingdoubly-fed induction generatorfrequency regulationadaptive gainrotor speedfrequency deviation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hyewon Lee Min Hwang Eduard Muljadi Poul Sørensen Yong Cheol Kang |
spellingShingle |
Hyewon Lee Min Hwang Eduard Muljadi Poul Sørensen Yong Cheol Kang Power-Smoothing Scheme of a DFIG Using the Adaptive Gain Depending on the Rotor Speed and Frequency Deviation Energies power smoothing doubly-fed induction generator frequency regulation adaptive gain rotor speed frequency deviation |
author_facet |
Hyewon Lee Min Hwang Eduard Muljadi Poul Sørensen Yong Cheol Kang |
author_sort |
Hyewon Lee |
title |
Power-Smoothing Scheme of a DFIG Using the Adaptive Gain Depending on the Rotor Speed and Frequency Deviation |
title_short |
Power-Smoothing Scheme of a DFIG Using the Adaptive Gain Depending on the Rotor Speed and Frequency Deviation |
title_full |
Power-Smoothing Scheme of a DFIG Using the Adaptive Gain Depending on the Rotor Speed and Frequency Deviation |
title_fullStr |
Power-Smoothing Scheme of a DFIG Using the Adaptive Gain Depending on the Rotor Speed and Frequency Deviation |
title_full_unstemmed |
Power-Smoothing Scheme of a DFIG Using the Adaptive Gain Depending on the Rotor Speed and Frequency Deviation |
title_sort |
power-smoothing scheme of a dfig using the adaptive gain depending on the rotor speed and frequency deviation |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2017-04-01 |
description |
In an electric power grid that has a high penetration level of wind, the power fluctuation of a large-scale wind power plant (WPP) caused by varying wind speeds deteriorates the system frequency regulation. This paper proposes a power-smoothing scheme of a doubly-fed induction generator (DFIG) that significantly mitigates the system frequency fluctuation while preventing over-deceleration of the rotor speed. The proposed scheme employs an additional control loop relying on the system frequency deviation that operates in combination with the maximum power point tracking control loop. To improve the power-smoothing capability while preventing over-deceleration of the rotor speed, the gain of the additional loop is modified with the rotor speed and frequency deviation. The gain is set to be high if the rotor speed and/or frequency deviation is large. The simulation results based on the IEEE 14-bus system clearly demonstrate that the proposed scheme significantly lessens the output power fluctuation of a WPP under various scenarios by modifying the gain with the rotor speed and frequency deviation, and thereby it can regulate the frequency deviation within a narrow range. |
topic |
power smoothing doubly-fed induction generator frequency regulation adaptive gain rotor speed frequency deviation |
url |
http://www.mdpi.com/1996-1073/10/4/555 |
work_keys_str_mv |
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