抄録
Large area interconnection of power systems are increasing year by year to improve reliability and economy of the interconnected system, and its configuration has become very complex. In such a system undamped power swings with low frequency tend to occur. For the stabilization of the power systems, it is important to detect the unstable mode efficiently and to operate a power system stabilizer adequately according to the detected signal. A system observer is often used for this purpose. On the other hand, the complexity of power system configuration may make it difficult to construct the observer.
In this paper a simple observer is constructed by using the order reduction method for power system models and is applied to the power system stabilization by superconducting magnetic energy storage. Some numerical and experimental studies demonstrate the significance of the state observation and its power stabilization capability.
