CA2346732A1 - A protective relay-based monitoring system of dc power within an electric power substation - Google Patents

A protective relay-based monitoring system of dc power within an electric power substation Download PDF

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Publication number
CA2346732A1
CA2346732A1 CA002346732A CA2346732A CA2346732A1 CA 2346732 A1 CA2346732 A1 CA 2346732A1 CA 002346732 A CA002346732 A CA 002346732A CA 2346732 A CA2346732 A CA 2346732A CA 2346732 A1 CA2346732 A1 CA 2346732A1
Authority
CA
Canada
Prior art keywords
monitoring system
substation
protective relay
electric power
power
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002346732A
Other languages
French (fr)
Other versions
CA2346732C (en
Inventor
Jeffrey B. Roberts
Tony J. Lee
David E. Whitehead
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schweitzer Engineering Laboratories Inc
Original Assignee
Schweitzer Engineering Laboratories, Inc.
Jeffrey B. Roberts
Tony J. Lee
David E. Whitehead
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 Schweitzer Engineering Laboratories, Inc., Jeffrey B. Roberts, Tony J. Lee, David E. Whitehead filed Critical Schweitzer Engineering Laboratories, Inc.
Publication of CA2346732A1 publication Critical patent/CA2346732A1/en
Application granted granted Critical
Publication of CA2346732C publication Critical patent/CA2346732C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency 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
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/06—Arrangements for supplying operative power
    • 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
    • H02H3/16—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 fault current to earth, frame or mass

Abstract

A DC monitoring system is provided in each protective relay in an electric power substation to detect DC grounds on the DC supply system. The DC monitoring system includes a first portion (62, 64) which indicates the presence of a DC ground. In a second portion of the system (76, 78), the voltages at the contact inputs of the relay are recognized and compared against a standard voltage value range.
An indication is provided when the recognized voltage is within said range.
The combination of the indications from the first and second portions is useful in determining the location of DC grounds in the substation DC supply system.
CA002346732A 1998-10-08 1999-10-06 A protective relay-based monitoring system of dc power within an electric power substation Expired - Fee Related CA2346732C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/169,370 1998-10-08
US09/169,370 US6084755A (en) 1998-10-08 1998-10-08 Protective relay-based monitoring system of DC power within an electric power substation
PCT/US1999/023333 WO2000021175A1 (en) 1998-10-08 1999-10-06 A protective relay-based monitoring system of dc power within an electric power substation

Publications (2)

Publication Number Publication Date
CA2346732A1 true CA2346732A1 (en) 2000-04-13
CA2346732C CA2346732C (en) 2008-08-05

Family

ID=22615387

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002346732A Expired - Fee Related CA2346732C (en) 1998-10-08 1999-10-06 A protective relay-based monitoring system of dc power within an electric power substation

Country Status (6)

Country Link
US (1) US6084755A (en)
EP (1) EP1119891A4 (en)
AU (1) AU761774B2 (en)
BR (1) BR9914383A (en)
CA (1) CA2346732C (en)
WO (1) WO2000021175A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2620828A1 (en) * 2005-09-19 2007-03-29 Schweitzer Engineering Laboratories, Inc. Method and apparatus for routing data streams among intelligent electronic devices
US7755872B2 (en) * 2006-09-14 2010-07-13 Schweitzer Engineering Laboratories, Inc. System, method and device to preserve protection communication active during a bypass operation
US8040139B2 (en) * 2009-02-16 2011-10-18 Maxim Integrated Products, Inc. Fault detection method for detecting leakage paths between power sources and chassis
US8598897B2 (en) * 2010-01-26 2013-12-03 Maxim Integrated Products, Inc. Isolation monitoring system and method utilizing a variable emulated inductance
CN106707083A (en) * 2016-12-28 2017-05-24 国家电网公司 Substation direct current grounding detecting device
JP6932964B2 (en) * 2017-03-25 2021-09-08 東京電力ホールディングス株式会社 DC power supply circuit disconnection discriminator and wiring discriminator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619775A (en) * 1969-11-25 1971-11-09 Pulse Monitors Inc Polarity and voltage level detecting test probe
CA933237A (en) * 1971-06-16 1973-09-04 A. I. Young John Dc bus resistive path to ground fault detector
US4929901A (en) * 1985-09-06 1990-05-29 Dorr Kimball DC ground fault detection
US5530363A (en) * 1994-10-31 1996-06-25 John Gaughan DC ground fault detecting apparatus with an auto-null circuit and method

Also Published As

Publication number Publication date
WO2000021175A1 (en) 2000-04-13
AU761774B2 (en) 2003-06-12
CA2346732C (en) 2008-08-05
EP1119891A1 (en) 2001-08-01
US6084755A (en) 2000-07-04
BR9914383A (en) 2002-01-15
AU6418999A (en) 2000-04-26
EP1119891A4 (en) 2002-03-20

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Effective date: 20171006