A new single-ended artificial neural network-based protection scheme for shunt faults in six-phase transmission line

Abstract

SUMMARYIn this paper, modular concept of artificial neural network (ANN)-based technique is introduced to identify and locate all type of shunt faults (120) in a six-phase transmission line. The proposed algorithm is composed of two stages. In the first stage, ANN-based algorithm has been developed to detect and classify all possible types of shunt faults within one cycle time. Then, the second stage dispenses the location of shunt faults. Total 11 numbers of modular ANNs have been developed in both the stages which are based on the fundamental components of voltage and current signals at the sending end of transmission line only. For validation of the proposed scheme, simulation studies have been carried out on a six-phase transmission system. The test results of ANN-based fault detector/classifier and locator indicate that the proposed algorithm correctly detects/classifies and locates the shunt faults. The results demonstrate high speed, reliability and suitability of the proposed technique and its adaptability to changing system conditions viz. fault type, fault inception angle, fault location, high fault resistance, short circuit capacity of source and its X/R ratio. Even the cases of slight variations in system frequency, generated voltage and initial power flow angle are also taken into account.

Fault detection and optimal coordination of overcurrent relay in offshore wind farm connected to onshore grid with VSC-HVDC

“…The formal objective function is a linear combination of x 1 , x 2 , x 3 , and x 4 representing TMS1, TMS2, TMS3, and TMS4, respectively, in Equation (18). The basic objective is to minimize time of operation, which is a function of both TMS and PSM.…”

A single-end directional relaying scheme for double-circuit transmission line using fuzzy expert system

“…Numerous strategies have proposed to determine directional relaying in transmission lines [4][5][6]. Researchers have explained technique to classify and locate transmission line faults in [7][8][9]. The protection techniques [10,11,12] have been used the fault currents only.…”

“…A comprehensive study of protection methodology for transmission line is described in [18]. The methodologies in the literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] did not provide the discrimination, classification, and location of shunt faults in double-circuit three-phase transmission (DC3PT) line.…”

“…In this paper, a new fault directional relaying, classification, and location procedure is introduced for DC3PT line based on FES and fundamental frequency component of currents. Unlike most of the past contributions in the literature [4][5][6][7][8][9], the proposed FES approach is independent of other end information. Summary of proposed work contributions is explained as:…”

Fuzzy Logic Based Scheme for Directional Earth Fault Detection and Classification

“…By reason of recent technology advances, new and improved relays for protection of power system are being designed and developed. Various modern protection schemes based on artificial neural networks [2][3] and fuzzy logic [4][5] have been developed for protection of three phase transmission lines. The benefit of using fuzzy logic is its simplicity and flexibility over any problem.…”