WO2008018940A3 - Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system - Google Patents

Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system Download PDF

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Publication number
WO2008018940A3
WO2008018940A3 PCT/US2007/011602 US2007011602W WO2008018940A3 WO 2008018940 A3 WO2008018940 A3 WO 2008018940A3 US 2007011602 W US2007011602 W US 2007011602W WO 2008018940 A3 WO2008018940 A3 WO 2008018940A3
Authority
WO
WIPO (PCT)
Prior art keywords
power distribution
distribution system
methods
systems
detecting high
Prior art date
Application number
PCT/US2007/011602
Other languages
French (fr)
Other versions
WO2008018940A2 (en
Inventor
Daqing Hou
Original Assignee
Schweitzer Engineering Lab Inc
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
Priority claimed from US11/499,620 external-priority patent/US7720619B2/en
Application filed by Schweitzer Engineering Lab Inc filed Critical Schweitzer Engineering Lab Inc
Priority to BRPI0714604-3A priority Critical patent/BRPI0714604A2/en
Priority to CA2659791A priority patent/CA2659791C/en
Publication of WO2008018940A2 publication Critical patent/WO2008018940A2/en
Publication of WO2008018940A3 publication Critical patent/WO2008018940A3/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The system and methods monitor odd harmonics within a power distribution system quantity using a special digital filter (1602). A normal level of odd harmonics for the monitored quantity is established. Over predetermined time periods, the odd harmonics within th power distribution quantity are compared to the normal level, and a determination of whether a high-impedance fault is present in the monitored power distribution system is made.
PCT/US2007/011602 2006-08-04 2007-05-15 Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system WO2008018940A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BRPI0714604-3A BRPI0714604A2 (en) 2006-08-04 2007-05-15 system and method for detecting a high impedance fault in a multi-grounded power distribution system, circuit, and methods for generating a digital output signal consisting substantially of odd harmonics in a digital input signal, for detecting the occurrence of an event within at least one digital signal and to disable a high impedance fault detector in a multi-grounded three-phase power distribution system
CA2659791A CA2659791C (en) 2006-08-04 2007-05-15 Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11/499,620 2006-08-04
US11/499,620 US7720619B2 (en) 2006-08-04 2006-08-04 Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system
US11/803,386 2007-05-14
US11/803,386 US7945400B2 (en) 2006-08-04 2007-05-14 Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system

Publications (2)

Publication Number Publication Date
WO2008018940A2 WO2008018940A2 (en) 2008-02-14
WO2008018940A3 true WO2008018940A3 (en) 2008-10-02

Family

ID=39033451

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/011602 WO2008018940A2 (en) 2006-08-04 2007-05-15 Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system

Country Status (1)

Country Link
WO (1) WO2008018940A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103279650B (en) * 2013-05-10 2016-12-28 国家电网公司 The sampling value synchronization interpolation method of compatible data delay jitter or loss

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5521946A (en) * 1994-01-07 1996-05-28 The 3Do Company Multi-phase filter/DAC
US5561605A (en) * 1993-08-20 1996-10-01 Eaton Corporation Arc detection using current variation
US6934654B2 (en) * 2003-03-21 2005-08-23 Schweitzer Engineering Laboratories, Inc. System and method for exact compensation of fundamental phasors

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5561605A (en) * 1993-08-20 1996-10-01 Eaton Corporation Arc detection using current variation
US5521946A (en) * 1994-01-07 1996-05-28 The 3Do Company Multi-phase filter/DAC
US6934654B2 (en) * 2003-03-21 2005-08-23 Schweitzer Engineering Laboratories, Inc. System and method for exact compensation of fundamental phasors

Also Published As

Publication number Publication date
WO2008018940A2 (en) 2008-02-14

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