LOCATING METHOD OF DISTURBANCE SOURCE OF FORCED POWER OSCILLATION BASED ON PRONY ANYASIS

The characteristics of modern power grid such as extreme high voltage, large capacity and interconnection network bring a lot of challenges to the security and stabilization of power system in our country. Among them, forced power oscillation is an important problem which widely exists and needs to be studied urgently. And the study of synchronizing torque and damping torque is an important method to analyze low frequency oscillation. In this paper, Firstly, the theoretical analysis of forced power oscillation based on two-machine equivalent system has been done. Secondly, A new Prony analysis of electric torque coefficient (ETC) is proposed as the old method of ETC doesn't work well. Then, the damping torque of the machine considering the engine speed regulation system is analyzed theoretically. Finally, the simulation in the four-machine two regions system is done and the results have verified the feasibility and effectiveness of the new method.