DocumentCode :
2838914
Title :
A Robust Feedback Linearization Controller Design for Thyristor Control Series Capacitor to Damp Electromechanical Oscillations
Author :
Barkhordary, M. ; Nabavi, S.M.H. ; Motlagh, M. R Jahed ; Kazemi, A.
Author_Institution :
Iran Univ. of Sci. & Technol., Tehran
fYear :
2006
fDate :
15-17 Dec. 2006
Firstpage :
2587
Lastpage :
2592
Abstract :
FACTS devices such as TCSC are capable of controlling power flow, improving transient stability, mitigating sub synchronous resonance (SSR), and reducing fault currents. An efficient control scheme is required to ensure the best use of TCSC. Conventional control strategies are based on approximate linearized model with fixed structures and parameters. But in fact, the nature of a power system not only is highly nonlinear but also exhibits some kind of uncertainty. In this paper, a robust feedback linearization controller is designed for this purpose. First, a suitable diffeomorphism transformation is used to linearize the nominal model. Then, a recursive method is used to complete the adaptive control law. The obtained controller can stabilize the uncertain system if the value of the uncertain parameter belongs to a presupposed closed region. Two different faults have been applied in the system. A symmetrical three-phase short-circuit fault which occurs at the generator bus and at the midpoint of the transmission line as well as a sudden load removing fault are applied. By using computer simulation of different operating conditions and disturbances, the effectiveness of the proposed robust nonlinear controller is established. The designed controller is applicable as it doesn´t need any complicated computation while providing good performance in different operating conditions.
Keywords :
adaptive control; control system synthesis; feedback; linearisation techniques; nonlinear control systems; oscillations; power system faults; power system transient stability; power transmission control; robust control; short-circuit currents; thyristor applications; uncertain systems; FACTS devices; TCSC; adaptive control law; damp electromechanical oscillations; diffeomorphism transformation; fault currents; power flow control; robust feedback linearization controller; robust nonlinear controller; sub synchronous resonance; three-phase short-circuit fault; thyristor control series; transient stability; uncertain system; Fault currents; Linear feedback control systems; Load flow; Power capacitors; Power system modeling; Power system stability; Power system transients; Resonance; Robust control; Thyristors; Adaptive Feedback Linearization; Electromechanical oscillations; Robust Control; TCSC controller;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Technology, 2006. ICIT 2006. IEEE International Conference on
Conference_Location :
Mumbai
Print_ISBN :
1-4244-0726-5
Electronic_ISBN :
1-4244-0726-5
Type :
conf
DOI :
10.1109/ICIT.2006.372674
Filename :
4237996
Link To Document :
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