A Hybrid Energy and Mode Decomposition-Based Method for Evaluating Generators Damping in Multi-Machine Power Systems

The increasing number of low-frequency oscillation events has posed significant challenges to power system stability. It is imperative accurately identify and properly control generators with poor or negative damping contribution for better damping. This paper proposes a hybrid energy mode decomposition-based method evaluating in multi-machine systems. derived that the aggregate electric torque can be modeled as superposition torques different modes. In each mode, decomposed into synchronizing torque. Moreover, novel function developed evaluate generators' effect mode. result proves attenuated energies have effects. Simulation results single multinegative cases, well comparison other methods, demonstrate effectiveness robustness proposed evaluation.