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1. EP3271985 - SECURED FAULT DETECTION IN A POWER SUBSTATION

Office European Patent Office
Application Number 16765891
Application Date 21.03.2016
Publication Number 3271985
Publication Date 24.01.2018
Publication Kind A4
IPC
H02H 3/00
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
G01R 31/02
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
G01R 31/44
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
44Testing lamps
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
H02H 7/28
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
28for meshed systems
CPC
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 7/261
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
H02H 7/28
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
28for meshed systems
H02H 1/04
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
1Details of emergency protective circuit arrangements
04Arrangements for preventing response to transient abnormal conditions, e.g. to lightning ; or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
H02H 1/043
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
1Details of emergency protective circuit arrangements
04Arrangements for preventing response to transient abnormal conditions, e.g. to lightning ; or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
043to inrush currents
H02H 1/046
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
1Details of emergency protective circuit arrangements
04Arrangements for preventing response to transient abnormal conditions, e.g. to lightning ; or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
046upon detecting saturation of current transformers
Applicants ABB INC
Inventors CUI TAO
NUQUI REYNALDO
ISHCHENKO DMITRY
WANG ZHENYUAN
Designated States
Priority Data 201562135469 19.03.2015 US
Title
(DE) GESICHERTE FEHLERERKENNUNG IN EINEM UMSPANNWERK
(EN) SECURED FAULT DETECTION IN A POWER SUBSTATION
(FR) DÉTECTION DE DÉFAILLANCE SÉCURISÉE DANS UN POSTE ÉLECTRIQUE
Abstract
(EN)
Systems and methods for fault detection and protection in electric power systems that evaluates electromagnetic transients caused by faults. A fault can be detected using sampled data from a first monitored point in the power system. Detection of fault transients and associated characteristics, including transient direction, can also be extracted through evaluation of sample data from other monitored points in the power system. A monitoring device can evaluate whether to trip a switching device in response to the detection of the fault and based on confirmation of an indication of detection of fault transients at the other monitored points of the power system. The determination of whether to trip or activate the switching device can also be based on other factors, including the timing of receipt of an indication of the detection of the fault transients and/or an evaluation of the characteristics of the detected transients.

(FR)
La présente invention concerne des systèmes et des procédés de détection de défaillance et de protection dans des systèmes électriques. Ladite invention évalue les transitoires électromagnétiques causés par des défaillances. Une défaillance peut être détectée en utilisant des données échantillonnées à partir d'un premier point surveillé dans le système électrique. La détection de transitoires de défaillance et de caractéristiques associées, y compris la direction de transitoire, peut également être extraite par évaluation de données d'échantillon à partir d'autres points surveillés dans le système électrique. Un dispositif de surveillance peut évaluer s'il faut déclencher un dispositif de commutation en réponse à la détection de la défaillance et en fonction de la confirmation d'une indication de détection de transitoires de défaillance aux autres points surveillés du système électrique. La détermination du fait qu'il faut déclencher ou activer le dispositif de commutation peut également être fondée sur d'autres facteurs, y compris l'instant de réception d'une indication de la détection des transitoires de défaillance et/ou une évaluation des caractéristiques des transitoires détectés.

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