Delay-independent decentralized stabilizer design for large interconnected power systems based on WAMS

Recent stabilizer design using wide-area measurement systems (WAMS) signals has been suggested to enhance the dynamic performance of large interconnected power systems. However, there is an unavoidable delay involved before these signals are received at the stabilizer site. Long time-delay may be de...

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Bibliographic Details
Published in:International journal of electrical power & energy systems 2007-12, Vol.29 (10), p.775-782
Main Authors: Dou, Chun-xia, Jia, Qing-quan, Jin, Shi-jiu, Bo, Zhi-qian
Format: Article
Language:English
Subjects:
Applied sciences
Delay-independent
Electrical engineering. Electrical power engineering
Electrical machines
Electrical power engineering
Exact sciences and technology
H∞ fuzzy control
LMI
Miscellaneous
Operation. Load control. Reliability
Power networks and lines
Power systems
Regulation and control
T–S fuzzy model
WAMS
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Summary:Recent stabilizer design using wide-area measurement systems (WAMS) signals has been suggested to enhance the dynamic performance of large interconnected power systems. However, there is an unavoidable delay involved before these signals are received at the stabilizer site. Long time-delay may be detrimental to system stability and may degrade system performance. Therefore, the delay-independent robust control problem of large interconnected power systems based on WAMS is studied via H ∞ fuzzy control method. First, a set of equivalent Takagi–Sugeno (T–S) fuzzy model is employed to represent the large interconnected power systems. A wide-area state feedback decentralized control scheme is developed to stabilize the T–S fuzzy systems without any wide-area signals delay information such that the H ∞ performance is achieved. The H ∞ fuzzy robust control design problem is parameterized in terms of a linear matrix inequality (LMI) problem, and the LMI problem can be solved very efficiently using the convex optimization techniques. Finally, the performance of the robust control is studied using a fourteen-machine interconnected power system example.
ISSN:0142-0615
1879-3517
DOI:10.1016/j.ijepes.2007.06.024