CA2210857A1 - Improved loss of potential determination for use in protective relays for electric power systems - Google Patents

Improved loss of potential determination for use in protective relays for electric power systems

Info

Publication number
CA2210857A1
CA2210857A1 CA2210857A CA2210857A CA2210857A1 CA 2210857 A1 CA2210857 A1 CA 2210857A1 CA 2210857 A CA2210857 A CA 2210857A CA 2210857 A CA2210857 A CA 2210857A CA 2210857 A1 CA2210857 A1 CA 2210857A1
Authority
CA
Canada
Prior art keywords
electric power
power systems
loss
protective relays
potential determination
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
CA2210857A
Other languages
French (fr)
Other versions
CA2210857C (en
Inventor
Jeffrey B. Roberts
Daqing Hou
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
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 filed Critical Schweitzer Engineering Laboratories Inc
Publication of CA2210857A1 publication Critical patent/CA2210857A1/en
Application granted granted Critical
Publication of CA2210857C publication Critical patent/CA2210857C/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
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/12—Measuring rate of change
    • 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
    • H02H3/24—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 undervoltage or no-voltage
    • H02H3/253—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 undervoltage or no-voltage for multiphase applications, e.g. phase interruption
    • 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
    • H02H3/38—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 both voltage and current; responsive to phase angle between voltage and current
    • H02H3/385—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 both voltage and current; responsive to phase angle between voltage and current using at least one homopolar quantity

Abstract

The positive sequence voltage on the power line is measured at a given time, i.e. the present time, and also for one cycle earlier, and the ratio thereof is then compared against a threshold value of 0.9. There are four other supervisory tests which also must be true for a loss of potential condition to be indicated. These include determination of change in positive sequence current and angle and zero sequence current and angle. If the change in those values is smaller than selected thresholds, then a loss of potential condition is indicated.
CA002210857A 1996-07-26 1997-07-18 Improved loss of potential determination for use in protective relays for electric power systems Expired - Fee Related CA2210857C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/687,836 US5883578A (en) 1996-07-26 1996-07-26 Loss of potential determination for use in protective relays for electric power systems
US08/687,836 1996-07-26

Publications (2)

Publication Number Publication Date
CA2210857A1 true CA2210857A1 (en) 1998-01-26
CA2210857C CA2210857C (en) 2000-11-14

Family

ID=24762064

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002210857A Expired - Fee Related CA2210857C (en) 1996-07-26 1997-07-18 Improved loss of potential determination for use in protective relays for electric power systems

Country Status (2)

Country Link
US (1) US5883578A (en)
CA (1) CA2210857C (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1303897A1 (en) * 2000-06-26 2003-04-23 Premier Aviation, Inc. Method and apparatus for detecting electrical faults and isolating power source from the electrical faults
US6671144B1 (en) 2000-06-26 2003-12-30 Premier Aviation, Inc. Method and apparatus for detecting ground faults and for isolating power supply from the ground faults
US6833711B1 (en) * 2003-08-01 2004-12-21 Schweitzer Engineering Laboratories, Inc. Protective relay for powers systems having dependable out-of-step blocking capability
CN101171730B (en) * 2005-05-13 2010-12-08 Abb技术有限公司 Method and apparatus for improving operational reliability during a loss of a phase voltage
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
CN101523681B (en) * 2006-10-13 2013-03-06 Abb技术有限公司 Faulted phase decision method and device between current and voltage based delta phase selectors
US8035944B2 (en) * 2008-02-22 2011-10-11 Liebert Corporation Power supply system with adaptive blown fuse detection using negative sequence component
DE102014202198A1 (en) * 2014-02-06 2015-08-06 Robert Bosch Gmbh Method for checking an automatic parking brake system
US10340684B2 (en) 2015-04-17 2019-07-02 Schweitzer Engineering Laboratiories, Inc. Voltage derivative and zero-sequence broken conductor detection
US10823777B2 (en) 2018-04-16 2020-11-03 Schweitzer Engineering Laboratories, Inc. Detection and location of broken conductors for transmission lines
US11143715B2 (en) 2019-08-15 2021-10-12 Schweitzer Engineering Laboratories, Inc. Broken conductor detection in a multiple-phase electric power delivery system
US11320495B2 (en) 2019-08-30 2022-05-03 Schweitzer Engineering Laboratories, Inc. Current-based directional element in a power delivery system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743889A (en) * 1971-12-16 1973-07-03 Hatch Inc Polyphase electric system protective apparatus
US3875463A (en) * 1974-03-14 1975-04-01 Dunham Associates Inc Motor protection circuit and automatic restart control system
US3947728A (en) * 1974-05-23 1976-03-30 Westinghouse Electric Corporation Network protector relay
US4091433A (en) * 1977-02-10 1978-05-23 General Electric Company Protective relay circuit for interphase faults
US4210948A (en) * 1978-06-15 1980-07-01 Allen-Bradley Company Method and apparatus for monitoring line voltage in a polyphase source
FR2480441A1 (en) * 1980-04-15 1981-10-16 Enertec METHOD AND DEVICES FOR IDENTIFYING DEFECTIVE PHASES IN AN ELECTRICAL DISTRIBUTION NETWORK
US4795983A (en) * 1988-03-07 1989-01-03 Westinghouse Electric Corp. Method and apparatus for identifying a faulted phase
US5041737A (en) * 1990-01-25 1991-08-20 Schweitzer Engineering Laboratories, Inc. Programmable bus-tie relay having a plurality of selectable setting groups
US5300924A (en) * 1992-08-21 1994-04-05 Basic Measuring Instruments Harmonic measuring instrument for AC power systems with a time-based threshold means
CA2145691A1 (en) * 1993-12-08 1996-09-29 Stephen B. Kuznetsov Method and apparatus for limiting high current electrical faults in distribution networks by use of superconducting excitation in transverse flux magnetic circuit

Also Published As

Publication number Publication date
CA2210857C (en) 2000-11-14
US5883578A (en) 1999-03-16

Similar Documents

Publication Publication Date Title
CA2210857A1 (en) Improved loss of potential determination for use in protective relays for electric power systems
CA2216434A1 (en) Arcing fault detection system
CA2052683A1 (en) A.c. electrical power supply installation with back-up power supply
EP0769836A3 (en) A directional element
CA2024488A1 (en) Method and apparatus for line power monitoring for uninterruptible power supplies
EP1126282A4 (en) Battery voltage detector
AU6036798A (en) Arcing fault detection system
EP0254992A3 (en) Alternating current power loss detector
TW342788U (en) Electric vehicle propulsion system power bridge with built-in test
EP0538618A3 (en) An h-shaped bridge circuit with protection against crossover conduction during the reversal of the current in the load
MY120430A (en) Battery protection circuit
CA2296958A1 (en) Detection of sub-cycle, self-clearing faults
EP0854365A3 (en) Numerical comparator
CA2045884A1 (en) Fault location in a multi-terminal network
EP0845681A3 (en) Electric motor monitoring arrangement
EP0657742A3 (en) Detection of arcs in power cables.
CA2023242A1 (en) Water sensing type power breaker circuit
GR3006796T3 (en)
CA2024351A1 (en) Differential protective relay apparatus
JPS6439222A (en) Circuit breaker
EP0392367A3 (en) Load state decision apparatus of servomotor
CA2346732A1 (en) A protective relay-based monitoring system of dc power within an electric power substation
EP0364591A4 (en) Electric discharge machining apparatus preventing electrolytic corrosion by short-circuit detection voltage.
IT9048351A0 (en) IMPROVED ALTERNATING CURRENT RELAY CIRCUIT WITH ZERO VOLTAGE SWITCHING.
CA2312723A1 (en) System and method for detecting voltage and current imbalance in an electrical energy supply

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20170718