Instantaneous modal estimation of sub-synchronous oscillations using Simplified Recursive Newton Type Algorithm

A method for instantaneous identification of parameters from sub-synchronous oscillations is proposed. The developed methodology uses an IIR band-pass filter bank to separate a generator speed signal into mono-component signals. A Simplified Recursive Newton Type Algorithm is employed to estimate modal parameters from the separated mono-component signals. Simulations with synthetic and test power system signals are used to assess the proposed method. The IEEE second benchmark on sub-synchronous resonance is used as a test power system.

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