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1. EP3367528 - LOCALIZED APPLICATION OF HIGH IMPEDANCE FAULT ISOLATION IN MULTI-TAP ELECTRICAL POWER DISTRIBUTION SYSTEM

Office
European Patent Office
Application Number 18157241
Application Date 16.02.2018
Publication Number 3367528
Publication Date 29.08.2018
Publication Kind A1
IPC
H02H 3/04
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
3Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
02Details
04with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
G01R 31/08
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
H02H 7/26
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
7Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred
H02J 13/00
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
13Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
CPC
H02H 3/042
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
3Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection
02Details
04with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
042combined with means for locating the fault
H02H 7/261
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
7Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
261involving signal transmission between at least two stations
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 31/52
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
H02J 13/00026
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
13Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
00006characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
00022using wireless data transmission
00026involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
H02J 13/00034
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
13Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
00032Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
00034the elements or equipment being or involving an electric power substation
Applicants ELECTRICAL MAT COMPANY
Inventors O'REGAN TIMOTHY M
O'REGAN TIMOTHY J
HAYES THOMAS M
Designated States
Priority Data 15435002 16.02.2017 US
Title
(DE) LOKALISIERTE ANWENDUNG VON HOHER IMPEDANZFEHLERISOLIERUNG IN MULTI-TAP-STROMVERTEILUNGSSYSTEM
(EN) LOCALIZED APPLICATION OF HIGH IMPEDANCE FAULT ISOLATION IN MULTI-TAP ELECTRICAL POWER DISTRIBUTION SYSTEM
(FR) APPLICATION LOCALISÉE D'UNE ISOLATION DE DÉFAUTS DE HAUTE IMPÉDANCE DANS UN SYSTÈME DE DISTRIBUTION D'ÉNERGIE ÉLECTRIQUE À PRISES MULTIPLES
Abstract
(EN) A high impedance fault isolation system (HIFIS) identifies, isolates and dissipates high impedance, low current faults which occur within an individual tap, or branch, of an electric power distribution system using only portions of the tap affected. A master meter, or father smart meter (FSM), on the affected tap sends a coded signal to an antenna receiver combined with a microprocessor and chip (420) which operates an electromagnetic control (EMC) grounding spring (409) switch which isolates the downed primary conductor by causing the distribution system protecting device (334), i.e., a high voltage fuse or recloser, to de-energize the downed primary wire. This localized application of the HIFIS at the individual tap level allows the FSM to analyze and determine, for example, that the specific field condition is a "downstream wire down", and that the installed isolating device has failed to operate because of insufficient fault current, allowing the localized intervention of the HIFIS to achieve the de-energization more efficiently and safely, and within a much shorter time period. A fire door sensor circuit then receives the trip signal from the microprocessor, causing the fire door sensor to melt open and release a shorting spring, in initiating operation of an expulsion fuse or recloser, which kills the downed live wire. Fig. 3
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