Power-Smoothing Scheme of a DFIG Using the Adaptive Gain Depending on the Rotor Speed and Frequency Deviation

Lee, Hyewon; Hwang, Min; Muljadi, Eduard; Sorensen, Poul; Kang, Yong Cheol

doi:10.3390/en10040555

Title: Power-Smoothing Scheme of a DFIG Using the Adaptive Gain Depending on the Rotor Speed and Frequency Deviation

Journal Article · Tue Apr 18 04:00:00 UTC 2017 · Energies (Basel)

DOI: https://doi.org/10.3390/en10040555 · OSTI ID:1358686

Lee, Hyewon ^[1]; Hwang, Min ^[1]; Muljadi, Eduard ^[2]; Sorensen, Poul ^[3];

^[1]

Chonbuk National Univ., Chonju (Korea)
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Technical Univ. of Denmark, Roskilde (Denmark)

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. In conclusion, 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.

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Research Organization:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1358686

Report Number(s):: NREL/JA--5D00-68324

Journal Information:: Energies (Basel), Journal Name: Energies (Basel) Journal Issue: 4 Vol. 10; ISSN 1996-1073; ISSN ENERGA

Publisher:: MDPI AGCopyright Statement

Country of Publication:: United States

Language:: English

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Cited By (2)

Proposals for Enhancing Frequency Control in Weak and Isolated Power Systems: Application to the Wind-Diesel Power System of San Cristobal Island-Ecuador Ochoa, Danny; Martinez, Sergio Energies, Vol. 11, Issue 4 https://doi.org/10.3390/en11040910	journal	April 2018
Incorporating State-of-Charge Balancing into the Control of Energy Storage Systems for Smoothing Renewable Intermittency Shim, Jae; Kim, Heejin; Hur, Kyeon Energies, Vol. 12, Issue 7 https://doi.org/10.3390/en12071190	journal	March 2019

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17 WIND ENERGY
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adaptive gain
doubly-fed induction generator
frequency deviation
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power smoothing
rotor speed

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