Park´s transformation analitycal approach of transient signal analysis for power systems

A rapid change in power system states leads to appearing of electromagnetic transients signals in system variables. Such transients are in the form of DC offset or frequencies above de fundamental and have information about its producer phenomenon. Thus, system signals can be recorded using adequate equipment in order to diagnose the phenomenon. Within the previous contextualization, this paper present an analytical study of Park´s transformation applied in the framework of power system three-phase signals. Furthermore, this paper highlights the potential use of such transformation as a filter that could be useful to improve the transient signal analysis. By means of a numerical implementation of Park´s transformation taken on Matlab environment, four cases are analyzed. Three of them consist on studying synthetics and controlled signals, whereas the last analyze the phase voltages of a faulted power system simulation performed in ATP-EMTP.