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1. WO2000040982 - PARTIAL DISCHARGE SITE LOCATION SYSTEM FOR DETERMINING THE POSITION OF FAULTS IN A HIGH VOLTAGE CABLE

Publication Number WO/2000/040982
Publication Date 13.07.2000
International Application No. PCT/US1999/031032
International Filing Date 29.12.1999
Chapter 2 Demand Filed 03.08.2000
IPC
G01R 31/08 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
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 31/12 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
12Testing dielectric strength or breakdown voltage
CPC
G01R 31/083
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
081according to type of conductors
083in cables, e.g. underground
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 31/1272
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
12Testing dielectric strength or breakdown voltage ; ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
1227of components, parts or materials
1263of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
1272of cable, line or wire insulation, e.g. using partial discharge measurements
Applicants
  • HUBBELL INCORPORATED [US/US]; 584 Derby Milford Road Orange, CT 06477-4024, US
Inventors
  • FAWCETT, Timothy; GB
Agents
  • LONGANECKER, Stacey ; Roylance, Abrams, Berdo & Goodman, LLP Suite 600 1300 19th Street, N.W. Washington, DC 20036, US
Priority Data
09/225,30505.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PARTIAL DISCHARGE SITE LOCATION SYSTEM FOR DETERMINING THE POSITION OF FAULTS IN A HIGH VOLTAGE CABLE
(FR) SYSTEME DE LOCALISATION DE SITE DE DECHARGE PARTIELLE POUR LOCALISER LES PANNES DANS UN CABLE A HAUTE TENSION
Abstract
(EN)
A pulse discharge site location (PDSL) system (12) is provided which captures pulses on a conductor without requiring the triggering functions of an oscilloscope. The PDSL system (12) comprises a pulse discharge measurement (PDM) system and is programmed to store the data captured by the PDM system in a reference buffer (46) corresponding in size to the propagation time of a pulse along the length of the conductor. Samples of the captured pulses are scanned to locate the peaks of pulses above a selected noise level. These pulses are stored into a temperary working buffer, along with a selected number of samples, normalized and then added to the reference buffer (46). The reference buffer (46) provides a statistical average of pulse activity. Fault site distances from the end of the cable can be determined due to the proportional dimension of the reference buffer (46) with respect to the length of the cable and cable propagation time.
(FR)
L'invention concerne un système de localisation de site de décharge d'impulsions (12) qui capte les impulsions sur un conducteur sans passer par les fonctions de déclenchement d'un oscillateur. Le système (12), qui comprend un dispositif de mesure de décharge des impulsions, est programmé pour enregistrer les données captées, dans un tampon de référence (46), dont la taille correspond au temps de propagation d'une impulsion le long du conducteur. Des échantillons de données ainsi recueillies sont explorés, afin de déterminer les crêtes d'impulsion situées au-dessus d'un niveau de bruit spécifique. On enregistre les impulsions dans un tampon de travail temporaire, avec un certain nombre d'échantillons, que l'on normalise et que l'on ajoute au tampon de référence (46). Ledit tampon de référence (46) donne une moyenne statistique de l'activité des impulsions. Il est possible de déterminer la distance des pannes par rapport à l'extrémité du câble, puisque le tampon de référence (46) a une taille proportionnelle à la longueur du câble et au temps de propagation sur le câble..
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