Voltage Sag Source Location in Distribution Networks.

Abstract

his paper describes a method developed to determine, in a distribution system, the relative location of a voltage sag source according to the geographical position of a recording device. The method is based on the analysis of the change in the instantaneous power (calculated from the line voltage and current waveforms recorded by the device) during the transient state.

For the development of the method, a low-voltage electrical model of a simplified distribution network has been used in order to simulate, in a controlled way, the main types of voltage sag sources. The results obtained with this model have been checked up by applying the method procedure to a number of real system voltage and current records.