Indian Journal of Science and Technology

Abstract

This paper presents a new method for Coordination of UPFC controllers. UPFC is one of the most important FACTS devices which have many applications include damping low-frequency oscillations, transient stability enhancement, active power and reactive power integrated control. Designing the appreciate controller for these devices has a major role in enhancing the stability and damping the oscillations. Using the Power System Stabilizer (PSS) is one of the most important methods for damping low-frequency oscillation which is economically efficient. In recent years, with the development of power electronics, the use of FACTS devices is one of the main strategies for damping low-frequency oscillations. Designing appropriate controllers for these devices has a major role in enhancing the stability and oscillation damping. In this study a new method based on output feedback is proposed for Designing UPFC controller. In this method input of the system expressed in terms of available outputs, so with the right choice of the output feedback gain of the target the system, it become stable. The output feedback gain are designed and compared for various UPFC and PSS controllers.

Keywords: Coordinated Design, Output Feedback, Power System Stabiliser, UPFC