Transmission line fault location: Simulation of real faults using wavelet transform based travelling wave methods

Abstract

In this study, High Voltage Transmission Line fault location accuracy of distance relays running impedance algorithm are compared with Travelling Wave (TW) method. Line faults in 154 kV Tatvan -Muş and 154 kV Patnos-Erciş lines in Turkish Electrical Transmission System are analyzed. Real faults in both lines are simulated in MATLAB-SIMULINK. Tower configuration and conductor properties of the lines and the source impedances are included in the simulation to comply with real system. Simulations show that both single-end and double-end Wavelet Transform (WT) based TW methods have better accuracy then the distance relays computing fault location by impedance methods.

Disturbance Modeling on Transmission Lines Using Wavelet Transform Method: A Review

“…The fault resistance, load flow, and compensated lines can affect the accuracy of applying the impedance-based fault location methods. There are 2 methods for locating the disturbance, which is Impedance -Based Method [1]. and Traveling Wave (TW) -Based Method [1], [2].…”

“…Distributing electrical energy from generators to consumers through transmission lines frequently encounters disturbances that can affect the reliability of the distribution system itself and the quality of the end product obtained by the consumers [1]- [3]. The unreliability of the system would greatly impact the transmission system, particularly when there are disturbances that can damage the equipment [4]- [6].…”

“…In the application of continuous wavelet transform (CWT), it produces a lot of wavelet transformation coefficients, causing the resulting data to become redundant [1], [7], [8], [22]. This problem can be overcome by using a discrete wavelet transform (DWT), where the decomposition algorithm uses MATLAB, which is the basis of the DWT system, by separating (decomposing) two input waveform signals into a low frequency (low frequency), which is called approximation, and a high frequency (high frequency), which is called detail [2], [23].…”

“…LL (Line to Line) is a phase-to-phase fault, and LLL (Three Phase Fault) is a three-phase short circuit fault classified as a symmetrical fault, where the current and voltage of each phase remain balanced after the disturbance occurs [1], [14]. So that a system like this can be analyzed using only positive sequences LLG (double line to ground or phase to phase to ground) is a twophase fault that causes a break in the middle phase wire on a transmission or distribution line with a vertical configuration, which can cause damage to the insulator in two-phase transmission or distribution at the same time [1]. LLLG (Three Phases to Ground Fault) is a Three-Phase-to-Ground Short Circuit Fault, which is a disturbance that occurs when the third phase is short-circuited to the ground [28].…”

Lifetime and performance alteration of photovoltaic panels, the case of Aerzen, Germany

“…With the development of technology, global electricity energy demand is growing [1][2][3]. Digitized world gives more importance to electrical energy, storage of generated energy and sustainable energy technologies.…”