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1. WO2020221618 - METHOD FOR DETECTING SOFT FAULTS IN A CABLE BY ANALYSING MAIN COMPONENTS

Publication Number WO/2020/221618
Publication Date 05.11.2020
International Application No. PCT/EP2020/061048
International Filing Date 21.04.2020
IPC
G01R 31/08 2020.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
08Locating faults in cables, transmission lines, or networks
G01R 31/11 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
08Locating faults in cables, transmission lines, or networks
11using pulse-reflection methods
G01R 31/52 2020.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
52Testing for short-circuits, leakage current or ground faults
CPC
G01R 31/088
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
08Locating faults in cables, transmission lines, or networks
088Aspects of digital computing
G01R 31/11
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
08Locating faults in cables, transmission lines, or networks
11using pulse reflection methods
G01R 31/52
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
52Testing for short-circuits, leakage current or ground faults
Applicants
  • COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES [FR]/[FR]
  • CENTRALESUPELEC [FR]/[FR]
  • CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE [FR]/[FR]
  • SORBONNE UNIVERSITE [FR]/[FR]
  • UNIVERSITE PARIS-SUD [FR]/[FR]
Inventors
  • TAKI, Nour
  • BEN HASSEN, Wafa
  • RAVOT, Nicolas
  • DELPHA, Claude
  • DIALLO, Demba
Agents
  • HAMMES, Pierre
  • LUCAS, Laurent
Priority Data
FR190458230.04.2019FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) METHOD FOR DETECTING SOFT FAULTS IN A CABLE BY ANALYSING MAIN COMPONENTS
(FR) PROCEDE DE DETECTION DE DEFAUTS NON FRANCS DANS UN CABLE PAR ANALYSE EN COMPOSANTES PRINCIPALES
Abstract
(EN)
A method for detecting faults in a transmission line (L) comprising the following steps: - defining (300) a plurality of test signals each having a different maximum spectral frequency band; - applying (302) an analysis of main components to the first multidimensional variable in order to determine a model of the transmission line at an initial instant; - acquiring (303) a plurality of temporal reflectograms corresponding to test signals previously introduced into the line (L) at a current instant; - determining (304) at least one prediction error; - comparing (305) the at least one prediction error to a fault detection threshold and deducing therefrom the existence of a fault when at least one prediction error exceeds a fault detection threshold for at least one sample of the multidimensional variable.
(FR)
Procédé de détection de défauts dans une ligne de transmission (L) comprenant les étapes de: - Définir (300) plusieurs signaux de test ayant chacun une bande spectrale de fréquence maximale différente - Appliquer (302) à la première variable multidimensionnelle, une analyse en composantes principales pour déterminer un modèle de la ligne de transmission à un instant initial, - Acquérir (303) plusieurs réflectogrammes temporels correspondants à des signaux de test préalablement injectés dans la ligne (L) à un instant courant - Déterminer (304) au moins une erreur de prédiction, - Comparer (305) l'au moins une erreur de prédiction à un seuil de détection de défauts et en déduire l'existence d'un défaut lorsqu'au moins une erreur de prédiction dépasse un seuil de détection de défauts pour au moins un échantillon de la variable multidimensionnelle.
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