A Remedial Action Scheme Against Oscillatory Instability based on Wide-Area Measurements

Generator tripping is one of the most effective approaches to prevent power system blackouts and to enhance dynamic security. In this paper, an initial study of a remedial action strategy based on generator tripping for multi-swing instability (oscillatory instability) is presented. The point of the proposed scheme is when to shed the generators as well as how many generators to be shed. In this scheme, real-time measurements to assess multi-swing instability are required. Our proposed oscillatory stability assessment scheme is also required for ranking the unstable generators to be shed. The proposed scheme is tested through time domain simulation for a typical study system model and good results are obtained