Detection and Classification of Faults on the Transmission Line Using Lissajous Figure

Abstract

This paper represents a method to detect and classify faults on the transmission line using Lissajous pattern of voltage and current signals. Three-phase fault voltage and current signals are recorded at one end of the transmission line, and the Lissajous figure is obtained for each phase. The area of the Lissajous figures is calculated at each point for its previous cycle. By calculating the change in this area, indices for fault detection and classification are obtained. The method is tested on a hybrid transmission line consisting of an overhead line and four underground cable sections for different fault conditions and found fast and accurate to detect and classify faults. Electromagnetic transient program (EMTP) and MATLAB software are used for power system simulation and computation, respectively.