Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Improved frequency mitigation of a variable-speed wind turbine

Authors
Li, M.Yang, D.Kang, Y.C.Hong, J.
Issue Date
Jun-2018
Publisher
Korean Institute of Electrical Engineerselecjour@kiee.or.kr
Keywords
Control gain; Frequency mitigation; Over-frequency section; Power smoothing; Variable-speed wind turbine
Citation
Transactions of the Korean Institute of Electrical Engineers, v.67, no.6, pp.695 - 701
Journal Title
Transactions of the Korean Institute of Electrical Engineers
Volume
67
Number
6
Start Page
695
End Page
701
URI
https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/4366
DOI
10.5370/KIEE.2018.67.6.695
ISSN
1975-8359
Abstract
For a power grid that has a high wind penetration level, when wind speeds are continuously fluctuating, the maximum power point tracking (MPPT) operation of a variable-speed wind turbine (VSWT) causes the significant output power fluctuation of a VSWT, thereby significantly fluctuating the system frequency. In this paper, an improved power-smoothing scheme of a VSWT is presented that significantly mitigates the frequency fluctuation caused by varying wind speeds. The proposed scheme employs an additional control loop based on the frequency deviation that operates in combination with the MPPT control loop. To improve the power-smoothing capability of a VSWT in the over-frequency section (OFS), the control gain of the additional loop, which is set to be inversely proportional to the rotor speed, is proposed. In contrast, the control gain in the under-frequency section is set to be proportional to the rotor speed to improve the power-smoothing capability while avoiding over-deceleration of the rotor speed of a VSWT. The proposed scheme significantly improves the performance of the power-smoothing capability in the OFS, thereby smoothing the frequency fluctuation. The results clearly demonstrate that the proposed scheme significantly mitigates the frequency fluctuation by employing the different control gain for the OFS under various wind penetration scenarios.
Files in This Item
There are no files associated with this item.
Appears in
Collections
IT융합대학 > 에너지IT학과 > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Hong, Jun Hee photo

Hong, Jun Hee
College of IT Convergence (Department of smart city)
Read more

Altmetrics

Total Views & Downloads

BROWSE