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ABSTRACT: This paper proposes a robust decentralized controller based on optimal sequential design. The proposed controller can directly consider the inter-area oscillation mode on design phase. Further, the sequential procedure is applied to design for robust controllers in consideration of other controllers. The best design sequence of the controller is decided by using the condition number. The effectiveness of the proposed controller is demonstrated by comparing it with conventional controllers. Damping of many oscillations for a multi-machine power system is demonstrated through simulations, which considered a three line-to-ground fault for power system disturbance
Power Systems Conference and Exposition, 2006. PSCE '06. 2006 IEEE PES; 12/2006
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ABSTRACT: 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
Power Engineering Conference, 2005. IPEC 2005. The 7th International; 01/2006
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ABSTRACT: This paper presents an approach of controlling induction generator terminal voltage and power factor by adjusting reactive power using compensating capacitor. At first, the theoretical equations expressing induction generator terminal voltage and power factor are derived. Then, the compensating capacitor in terms of wind velocity is determined quantitatively. By using the proposed control method, it is confirmed that the terminal voltage and operating power factor of wind power generation system can be maintained to a target value reference value even in the case when there is abrupt variation of wind speed. The validity of the proposed method is confirmed with MATLAB/SIMULINK simulations.
Intelligent Systems Application to Power Systems, 2005. Proceedings of the 13th International Conference on; 12/2005
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ABSTRACT: This paper deals with the control of induction generator terminal voltage and power factor which they are controlled by adjusting reactive power using compensating capacitor. At first, the theoretical equations expressing induction generator terminal voltage and power factor are derived. Then, the compensating capacitor in terms of wind velocity is determined quantitatively. By using the proposed control method, it is confirmed that to be able to keep the terminal voltage and operating power factor of wind power generation system to a target value even in the case when the abrupt deviation of wind speed is caused. The validity of the proposed method is confirmed with MATLAB/SIMULINK simulations.
Power System Technology, 2004. PowerCon 2004. 2004 International Conference on; 12/2004
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ABSTRACT: This paper presents a new SVC control scheme using H<sub>∞</sub> control design, based on the linear matrix inequality (LMI) approach, which achieve voltage control and damping of power oscillations simultaneously. The main feature of the LMI based H<sub>∞</sub> design is that selection of weighting function is more easier than the Riccati based H<sub>∞</sub> design approach. The proposed controller is available in real power system, since the model of SVC in simulation is a detailed model. Also, control of voltage and simultaneous damping of power oscillations for single-machine infinite-bus power system is demonstrated through simulation studies.
Power System Technology, 2004. PowerCon 2004. 2004 International Conference on; 12/2004
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[show abstract]
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ABSTRACT: This paper deals with the control of induction generator terminal voltage and power factor which controlled by adjusting reactive power using compensating capacitor. At first, the theoretical equations expressing induction generator terminal voltage and power factor are derived. Then, the compensating capacitor in terms of wind velocity is determined quantitatively. By using the proposed control method, it is confirmed to he able to keep the terminal voltage and operating power factor of wind power generation system to a target value even in the case when the abrupt deviation of wind speed is caused. The validity of the proposed method is confirmed with MATLAB/SIMULINK simulations
Power Engineering Conference, 2005. IPEC 2005. The 7th International;
