LAUSR

Abstract A novel model-free method for detecting coherency of generators in power systems by means of the Wavelet Packet Decomposition (WPD) and the Recurrence Quantification Analysis (RQA) is developed. The time-series rotor angles of generators are used in this approach to detect coherent group of generators. Noise is a critical issue that needs to be considered when evaluating the performance of the coherency detection methods based on monitored data. Coherent groups of generators are detected under different disturbances and the results appear to be robust in the presence of noise. Simulation data from a 29-machine 179-bus system model are applied and results based on this method presented.