Impact of measurement signals on the accuracy of online identification of power system dynamic signature

In order to identify the dynamic signature of power systems, it is important to monitor the generator rotor angles. The rotor angles can be obtained either by direct measurements of the rotor position or by indirect calculation of rotor angle from voltage and current measurements. Considering limited availability of direct measurements of rotor angles the indirect method is used in this paper taking into account the errors in calculated rotor angles. Decision tree based algorithm is used afterwards for online identification of power system dynamic signatures. Finally, the impact of the accuracy of measurement signals on the accuracy of the assessment of system dynamic signature is discussed.