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1. WO2020198141 - FAULT LOCATION SYSTEM USING VOLTAGE OR CURRENT MEASUREMENT FROM DIVERSE LOCATIONS ON A DISTRIBUTION NETWORK

Publication Number WO/2020/198141
Publication Date 01.10.2020
International Application No. PCT/US2020/024215
International Filing Date 23.03.2020
IPC
G01R 31/02 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
02Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
G05F 1/70 2006.01
GPHYSICS
05CONTROLLING; REGULATING
FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
1Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
70Regulating power factor; Regulating reactive current or power
H02H 9/00 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
9Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
CPC
G01R 19/2513
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
25using digital measurement techniques
2513Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
G01R 27/16
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
27Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
16Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
G01R 31/085
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
085in power transmission or distribution lines, e.g. overhead
G01R 31/086
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
086in power transmission or distribution networks, i.e. with interconnected conductors
G01R 31/62
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
62Testing of transformers
G01R 31/64
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
64Testing of capacitors
Applicants
  • S&C ELECTRIC COMPANY [US]/[US]
Inventors
  • SHARON, Yoav
Priority Data
62/823,11725.03.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FAULT LOCATION SYSTEM USING VOLTAGE OR CURRENT MEASUREMENT FROM DIVERSE LOCATIONS ON A DISTRIBUTION NETWORK
(FR) SYSTÈME DE LOCALISATION DE DÉFAILLANCE UTILISANT UNE MESURE DE TENSION OU DE COURANT À PARTIR DE DIVERS EMPLACEMENTS SUR UN RÉSEAU DE DISTRIBUTION
Abstract
(EN)
A method for identifying a location of a fault in an electrical power distribution network that includes identifying an impedance of an electrical line between each pair of adjacent utility poles, measuring a voltage and a current of the power signal at a switching device during the fault, and estimating a voltage at each of the utility poles downstream of the switching device using the impedance of the electrical line between the utility poles and the measured voltage and current during the fault. The method calculates a reactive power value at each of the utility poles using the estimated voltages, where calculating a reactive power value includes compensating for distributed loads along the electrical line that consume reactive power during the fault, and determines the location of the fault based on where the reactive power goes to zero along the electrical line.
(FR)
L'invention concerne un procédé d'identification d'un emplacement d'une défaillance dans un réseau de distribution d'énergie électrique qui comprend l'identification d'une impédance d'une ligne électrique entre chaque paire de pôles d'utilité adjacents, la mesure d'une tension et d'un courant du signal de puissance au niveau d'un dispositif de commutation pendant la défaillance et l'estimation d'une tension au niveau de chacun des pôles d'utilité en aval du dispositif de commutation à l'aide de l'impédance de la ligne électrique entre les pôles d'utilité et la tension et le courant mesurés pendant la défaillance. Le procédé calcule une valeur de puissance réactive au niveau de chacun des pôles d'utilité à l'aide des tensions estimées, le calcul d'une valeur de puissance réactive comprenant la compensation de charges distribuées le long de la ligne électrique qui consomment de l'énergie réactive pendant la défaillance, et détermine l'emplacement de la défaillance sur la base de l'endroit où la puissance réactive passe à zéro le long de la ligne électrique.
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