Characteristic Frequency of Travelling Waves Applied for Transmission Lines Fault Location Estimation

This paper presents an analytical approach for determining the characteristic frequency of transient signals generated from transmission lines faults. Transient signals of travelling waves generated by faults contain very important information about the fault distance. Therefore, the characteristic frequency can be used for transmission lines fault distance estimation. In order to demonstrate the effectiveness of the developed equations, five cases are simulated using different values for equivalent impedance of local terminal and maintaining the fault distance at 120 km from the sending-end. Results obtained show a good correlation between measured and calculated characteristic frequency allowing very good accuracy for fault distance estimation.