Desarrollo de una herramienta computacional para localización de fallas en líneas aéreas de transmisión mediante el tratamiento de señales almacenadas en archivos COMTRADE

Abstract

When a short circuit occurs in a transmission line, the location of the fault and the identification of the failed phase (s) delivered by the Intelligent Electronic Devices (IEDs) are the primary information that allows maintenance groups to repair the damage in the L/T; However, IEDs generally use single-ended fault locating algorithms that are subject to sources of error such as fault resistance or capacitive effect on the line, therefore, the present work aims to develop of a computational tool using the software MATLAB that allows estimating the location of the fault using information from the two terminals to minimize errors and unavailability times of the L/T. In addition, the tool allows to identify the type of failure and determine the failed phase (s).

The computational routines developed use one and two terminal fault location algorithms, and make estimates from: signal processing (current and voltage) stored by the IEDs in COMTRADE format files and transmission line parameters. To identify the type of fault, the sequence components of the fault current are used.