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Abstmct-This paper deals with the control o f 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 quan-titativeIy. By using the proposed control method, it Is confirmed 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 dviation of wind speed is caused. The validity of the prc+ posed method is confirmed with MATLAB/SIMULINK simulations.Keyword.9-induction generator, compensating capacitor, terminal voltage control, power factor control, MATLAB/SIMULINK

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.

SUMMARYThis paper deals with two types of control method for induction generators used in wind power generating stations. One is aimed at maintaining the voltage of the station node and the other is aimed at maintaining a constant power factor through the branch connecting to the station. Both can be in the controllable area by adjusting the generator reactive power with compensating capacitors. First, theoretical equations for the terminal voltage and power factor of an induction generator are derived, and then the compensating capacitance corresponding to the wind velocity variation is determined quantitatively. By using the proposed control method, it is shown to be possible to maintain the terminal voltage and operating power factor of a wind power generation system at the target values, even when abrupt deviations are caused by wind power disturbances.

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 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.