Single-Phase Fault Location in Four-Circuit Transmission Lines Based on Wavelet Analysis Using ANFIS

Abstract

This paper presents an efficient and effective method to determine the location of the single phase to ground fault in four-circuit transmission lines. In the proposed method, wavelet analysis based on advanced signal processing techniques are used to extract important features and record the dynamic characteristics of the fault signal using current sampled data of one side of the line. In this regard, the ANFIS network is used to find the relationship between the obtained characteristics from wavelet signal analysis of the fault signal and the changes in different fault conditions. In proposed method, there is no need to know the type of the fault or line information. Also, determination of faulty circuit and the use of intelligent methods to reduce computations are among the advantages of the proposed method. Studies and simulations have been implemented on a four-circuit transmission line of 500 kV and 200 km in PSCAD software. The results of wavelet analysis have been applied as an input of ANFIS network in MATLAB software. The results of the simulations are based on the implementation of different fault conditions, including the faulty circuit, fault location, fault inception, and fault resistance. These results indicate the high accuracy of the proposed method.