Institute of Information Theory and Automation

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AS seminář: On-line detection of oscillations in power networks

2010-10-18 11:30
The problem of early on-line detection of inter-area electro-mechanical oscillations in power systems is considered. The main objective is to give the transmission operator qualitative information regarding stability margins. The observed signal consisting of currents, voltages and angle differences is modeled using non-stationary second order autoregressive model. Bayesian estimation of the system is based on the forgetting approach. The stability margins are obtained as posterior probabilities that the poles of the estimated system are unstable. The approach is demonstrated on real retrospective data recorded in a 500 kV power grid and voltage data obtained by numerical simulations.
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2010-11-08 11:28