Experiences in using damping estimation methods in real-time oscillation monitoring

This paper presents experiences in applying electromechanical oscillation damping estimation methods in real-time use from the transmission system operator´s perspective. A wavelet based method and a method based on the multivariate autoregressive model are used for real-time monitoring of electromechanical oscillations. The paper analyzes the performance of these methods both under transient and ambient conditions. In the paper, real-time ambient data measured from the Nordic power system are analyzed. For transient analysis, also simulated data are used. Based on the results, recommendations regarding the use of modal analysis methods for monitoring of real power systems are given.