CA2312723A1 - System and method for detecting voltage and current imbalance in an electrical energy supply - Google Patents

System and method for detecting voltage and current imbalance in an electrical energy supply Download PDF

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Publication number
CA2312723A1
CA2312723A1 CA002312723A CA2312723A CA2312723A1 CA 2312723 A1 CA2312723 A1 CA 2312723A1 CA 002312723 A CA002312723 A CA 002312723A CA 2312723 A CA2312723 A CA 2312723A CA 2312723 A1 CA2312723 A1 CA 2312723A1
Authority
CA
Canada
Prior art keywords
electrical energy
threshold
energy supply
current imbalance
detecting voltage
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
CA002312723A
Other languages
French (fr)
Other versions
CA2312723C (en
Inventor
Vick A. Hubbard
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.)
Elster Solutions LLC
Original Assignee
Abb Power T & D Company Inc.
Vick A. Hubbard
Asea Brown Boveri Inc.
Abb Inc.
Elster Electricity, L.L.C.
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 Abb Power T & D Company Inc., Vick A. Hubbard, Asea Brown Boveri Inc., Abb Inc., Elster Electricity, L.L.C. filed Critical Abb Power T & D Company Inc.
Publication of CA2312723A1 publication Critical patent/CA2312723A1/en
Application granted granted Critical
Publication of CA2312723C publication Critical patent/CA2312723C/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
    • 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
    • H02H3/34—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 of a three-phase system
    • H02H3/353—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 of a three-phase system involving comparison of phase voltages

Landscapes

  • Supply And Distribution Of Alternating Current (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

A system (fig. 1) and method (fig. 2) for detecting a current imbalance or a voltage imbalance in multiphase electrical energy provided to an energy meter.
A phase single value is measured for each phase, a normalized phase value for each phase is determined, and a normalized phase ratio is then determined. The highest normalized phase value is compared to a first threshold, and the normalized phase value ratio is compared to a second threshold. It is determined that an imbalance exists when the high normalized phase value is greater than the first threshold and the normalized phase value ratio is less than the second threshold.
CA002312723A 1997-12-05 1998-11-18 System and method for detecting voltage and current imbalance in an electrical energy supply Expired - Fee Related CA2312723C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US6774897P 1997-12-05 1997-12-05
US6781697P 1997-12-05 1997-12-05
US60/067,816 1997-12-05
US60/067,748 1997-12-05
PCT/US1998/024780 WO1999030300A1 (en) 1997-12-05 1998-11-18 System and method for detecting voltage and current imbalance in an electrical energy supply

Publications (2)

Publication Number Publication Date
CA2312723A1 true CA2312723A1 (en) 1999-06-17
CA2312723C CA2312723C (en) 2002-06-25

Family

ID=26748217

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002312723A Expired - Fee Related CA2312723C (en) 1997-12-05 1998-11-18 System and method for detecting voltage and current imbalance in an electrical energy supply

Country Status (5)

Country Link
AU (1) AU1594399A (en)
BR (1) BR9814259A (en)
CA (1) CA2312723C (en)
RU (1) RU2202114C2 (en)
WO (1) WO1999030300A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4067913A1 (en) * 2021-03-26 2022-10-05 Airbus SAS Apparatus and method for detection current imbalance

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6946972B2 (en) 2001-01-25 2005-09-20 Smartsynch, Inc. Systems and methods for wirelessly transmitting data from a utility meter
RU2482588C1 (en) * 2012-04-06 2013-05-20 Открытое акционерное общество "Федеральная сетевая компания Единой энергетической системы" Device to generate synchronised data on power unit condition

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4319298A (en) * 1979-08-28 1982-03-09 General Electric Company Motor protection device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4067913A1 (en) * 2021-03-26 2022-10-05 Airbus SAS Apparatus and method for detection current imbalance
US11788899B2 (en) 2021-03-26 2023-10-17 Airbus (Sas) Apparatus and method for detection current imbalance

Also Published As

Publication number Publication date
BR9814259A (en) 2000-10-03
RU2202114C2 (en) 2003-04-10
AU1594399A (en) 1999-06-28
WO1999030300A1 (en) 1999-06-17
CA2312723C (en) 2002-06-25

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20161118