DK1479148T3 - Method and apparatus for fault current monitoring in an electrical AC network - Google Patents

Method and apparatus for fault current monitoring in an electrical AC network

Info

Publication number
DK1479148T3
DK1479148T3 DK03787796T DK03787796T DK1479148T3 DK 1479148 T3 DK1479148 T3 DK 1479148T3 DK 03787796 T DK03787796 T DK 03787796T DK 03787796 T DK03787796 T DK 03787796T DK 1479148 T3 DK1479148 T3 DK 1479148T3
Authority
DK
Denmark
Prior art keywords
current values
blocks
network
electrical
fault current
Prior art date
Application number
DK03787796T
Other languages
Danish (da)
Inventor
Hans-Peter Hohe
Josef Sauerer
Original Assignee
Fraunhofer Ges Forschung
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Application granted granted Critical
Publication of DK1479148T3 publication Critical patent/DK1479148T3/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Locating Faults (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

The invention relates to a method for monitoring fault currents in an electric AC mains having a predetermined mains frequency. According to the invention, current values of electric currents to be monitored are recorded (12a 12d), after which the recorded current values are converted into digitized current values (14). Afterwards, these digitized current values are used to calculate (16) cumulative current values, from which blocks comprised of the cumulative current values are formed (18) according to the phase position of a mains voltage signal. The blocks are then split (24) into spectral components. The spectral components of the blocks are then monitored (36) with regard to an exceeding of spectral limit values in order to evaluate the danger of the fault current.
DK03787796T 2002-08-14 2003-08-14 Method and apparatus for fault current monitoring in an electrical AC network DK1479148T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10237342A DE10237342B4 (en) 2002-08-14 2002-08-14 Method and device for monitoring residual current in an electrical AC network

Publications (1)

Publication Number Publication Date
DK1479148T3 true DK1479148T3 (en) 2006-03-13

Family

ID=31197025

Family Applications (1)

Application Number Title Priority Date Filing Date
DK03787796T DK1479148T3 (en) 2002-08-14 2003-08-14 Method and apparatus for fault current monitoring in an electrical AC network

Country Status (8)

Country Link
EP (1) EP1479148B1 (en)
AT (1) ATE308148T1 (en)
AU (1) AU2003251708A1 (en)
DE (2) DE10237342B4 (en)
DK (1) DK1479148T3 (en)
ES (1) ES2251703T3 (en)
NO (1) NO334166B1 (en)
WO (1) WO2004017483A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005028881B4 (en) * 2005-06-22 2010-04-29 Siemens Ag Fault current analyzer for detecting a fault current and device with fault current detection function
GB0614125D0 (en) * 2006-07-15 2006-08-23 Deepstream Technologies Ltd Method and apparatus of detecting and compensating for DC residual fault currents on electrical systems
DE102011107721B4 (en) 2011-07-14 2014-02-13 Ean Elektroschaltanlagen Gmbh Method and device for measuring electrical currents using a current transformer
EP2568557B1 (en) * 2011-09-07 2014-02-26 Siemens Aktiengesellschaft Method of operating a residual current circuit breaker and residual current circuit breaker for a frequency converter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE459706B (en) * 1987-11-12 1989-07-24 Asea Ab LAENGSDIFFERENTIALSKYDD
GB2231216B (en) * 1989-04-05 1993-04-14 Mitsubishi Electric Corp Zero-phase sequence current detector
US5075619A (en) * 1990-04-06 1991-12-24 Tektronix, Inc. Method and apparatus for measuring the frequency of a spectral line
DE19634438A1 (en) * 1996-08-26 1998-03-05 Siemens Ag Fault current or differential current (FI/DI) protection and G-type monitoring devices for dangerous shock currents
US6392422B1 (en) * 1997-06-17 2002-05-21 Dip.-Ing. Walther Bender Gmbh & Co. Kg Monitoring insulation and fault current in an A/C current network to provide load shutoff whenever differential current exceeds a certain response value
US6658360B1 (en) * 2000-06-09 2003-12-02 Siemens Aktiengesellschaft Software-controlled evaluation of fault currents for protection and monitoring systems
AT412047B (en) * 2002-05-27 2004-08-26 Moeller Gebaeudeautomation Kg FAULT CIRCUIT BREAKER

Also Published As

Publication number Publication date
ES2251703T3 (en) 2006-05-01
EP1479148A1 (en) 2004-11-24
DE50301495D1 (en) 2005-12-01
DE10237342A1 (en) 2004-03-04
NO334166B1 (en) 2013-12-23
NO20051268L (en) 2005-03-11
AU2003251708A1 (en) 2004-03-03
ATE308148T1 (en) 2005-11-15
EP1479148B1 (en) 2005-10-26
DE10237342B4 (en) 2004-07-29
WO2004017483A1 (en) 2004-02-26

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