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Power system stabilization based on robust centralized and decentralized controllers

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5 Author(s)
Senjyu, T. ; Dept. of Electr. & Electron. Eng., Ryukyus Univ., Okinawa ; Kuninaka, R. ; Urasaki, N. ; Fujita, H.
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For the improvement of electric power system transient stability, not only power system stabilizer (PSS) but also FACTS devices such as static VAr compensator (SVC) with voltage control and damping ability of power oscillation have already been practically used in power systems. A conventional control design for these stabilizers is based on classical control method, and its performance depends on the operating point. In this paper, we propose that decentralized controller needs only local information. In order to establish effectivity of proposed controller, we discuss and compare centralized and decentralized controllers for PSS and SVC based on mu-synthesis, which achieve voltage control and damping of power oscillations simultaneously. The /mu-synthesis is one of the robust controls and is used to coordinate PSS and SVC considering interactions among generators. Moreover, damping of power system oscillations and simultaneous control of terminal voltage for multi-machine power system are demonstrated through MATLAB/SIMULINK simulation

Published in:

Power Engineering Conference, 2005. IPEC 2005. The 7th International

Date of Conference:

Nov. 29 2005-Dec. 2 2005