Application of magnetic amplifier-based adjustable reactor

The power electronic devices have disadvantages including high cost and complex control facility. In order to solve the problem,magnetic amplifier was presented as a new approach to improve the system stability based on magnetically saturating reactor concept.The new device has more simple structure, smaller response time and linear output reactance.The operation principles of the magnetic amplifier were analyzed,and the model was built.A control strategy was proposed to demonstrate the application of the new device for damping low-frequency oscillation in single-machine infinite-bus system.A comparative analysis of the controller's performance was conducted.The experiments were developed by power systems CAD(PSCAD).Results verified the effectiveness of controller in damping low-frequency oscillations.