Robust STATCOM control for the stabilisation of fixed-speed wind turbines during low voltages

Hossain, M. J., Pota, H. R. and Ramos, R. A. (2011) Robust STATCOM control for the stabilisation of fixed-speed wind turbines during low voltages. Renewable Energy, 36 11: 2897-2905. doi:10.1016/j.renene.2011.04.010


Author Hossain, M. J.
Pota, H. R.
Ramos, R. A.
Title Robust STATCOM control for the stabilisation of fixed-speed wind turbines during low voltages
Journal name Renewable Energy   Check publisher's open access policy
ISSN 0960-1481
1879-0682
Publication date 2011-11
Sub-type Article (original research)
DOI 10.1016/j.renene.2011.04.010
Volume 36
Issue 11
Start page 2897
End page 2905
Total pages 9
Editor A. A. M. Sayigh
Place of publication East Park, Kidlington, Oxford, U.K.
Publisher Pergamon
Collection year 2012
Language eng
Formatted abstract
This paper presents a robust voltage control scheme for fixed-speed wind generators using a static synchronous compensator (STATCOM) controller. To enable a linear and robust control framework with structured uncertainty, the overall system is represented by a linear part plus a nonlinear part that covers an operating range of interest required to ensure stability during severe low voltages. The proposed methodology is flexible and readily applicable to larger wind farms of different configurations. The performance of the control strategy is demonstrated on a two area test system. Large disturbance simulations demonstrate that the proposed controller enhances voltage stability as well as transient stability of induction generators during low voltage ride through (LVRT) transients and thus enhances the LVRT capability.

Highlights: ► This paper presents a control method for a STATCOM for regulating reactive power exchanged between the machine and the grid. ► The proposed method can be used to design a linear robust controller to accommodate post-fault low-voltage conditions. ► The overall system is represented by a linear part plus a nonlinear part that covers an operating range of interest required to ensure stability. ► The reactive power control allows getting a unitary power factor between the stator and the grid. ► The STATCOM control scheme is based on the reformulation of the nonlinear dynamics using the mean-value theorem.
Keyword Dynamic voltage stability
Nonlinearity
Linearisation
STATCOM
Robust control
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Information Technology and Electrical Engineering Publications
 
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Created: Wed, 29 Jun 2011, 15:04:57 EST by Dr Jahangir Hossain on behalf of School of Information Technol and Elec Engineering