Detección direccional de un fallo a tierra

The device (20) has a signal processing module (30) comprising a calculation device (34) for calculating standardized correlation coefficients (rA-rC) between a signal representative of a homopolar current and signals representing phase currents (I-A-I-C) in a predetermined duration. The module incl...

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Bibliographic Details
Main Authors Verneau, Guillaume, Cumunel, Pascal
Format Patent
LanguageSpanish
Published 20.04.2020
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:The device (20) has a signal processing module (30) comprising a calculation device (34) for calculating standardized correlation coefficients (rA-rC) between a signal representative of a homopolar current and signals representing phase currents (I-A-I-C) in a predetermined duration. The module includes another calculation device (36) for calculating an arithmetic average (mu) and a standard deviation (sigma) between absolute values of the calculated correlation coefficients. An interpretation module (40) comprises a comparison device (38) for comparing the average and the standard deviation. Independent claims are also included for the following: (1) a ground fault passage indicator comprising current sensors (2) a ground protection relay comprising an activation unit (3) a method for directional-detection of a ground fault in a multiphase electrical network (4) a method for protecting a current line during appearance of a ground fault.
Bibliography:Application Number: ES20090354036T