Abstract:

Various control schemes have been developed to solve the power system inter-area oscillation problem. Increasingly Flexible AC Transmission Systems (FACTS) devices are being planned to solve various power system operational and planning problems in some large-scale power systems in many countries. One of the design objectives is to reduce some critical inter-area oscillations existing inthe system. In this paper, FACTS controllers, based on variable structure control technology, were proposed to alleviate the interarea oscillation problem. Bothseries and parallel connected FACTS devices were studied. Case studies were presented to illustrate the effectiveness of the proposed controllers.

Key words: FACTS; inter-area oscillation; power system stability and control