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BR9814259A - System and method for detecting voltage and current imbalances in an electricity supply - Google Patents

System and method for detecting voltage and current imbalances in an electricity supply

Info

Publication number
BR9814259A
BR9814259A BR9814259-3A BR9814259A BR9814259A BR 9814259 A BR9814259 A BR 9814259A BR 9814259 A BR9814259 A BR 9814259A BR 9814259 A BR9814259 A BR 9814259A
Authority
BR
Brazil
Prior art keywords
limit
electricity supply
normalized phase
detecting voltage
phase
Prior art date
Application number
BR9814259-3A
Other languages
Portuguese (pt)
Inventor
Vick A Hubbard
Original Assignee
Abb Power T & D Co
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 Co filed Critical Abb Power T & D Co
Publication of BR9814259A publication Critical patent/BR9814259A/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
    • 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

Patente de Invenção: <B>"SISTEMA E MéTODO PARA DETECTAR O DESEQUILìBRIO DE VOLTAGEM E DE CORRENTE EM UM FORNECIMENTO DE ENERGIA ELéTRICA"<D>. Um sistema (Figura 1) e um método (Figura 2) para detectar um desequilíbrio de corrente ou um desequilíbrio de voltagem em energia elétrica de fases múltiplas fornecida para um medidor de energia. Um valor único de fase é medido para cada fase, um valor de fase normalizado para cada fase é determinado, e uma razão de fases normalizadas é então determinada. O valor de fase normalizado mais alto é comparado com um primeiro limite, e a razão de valores de fase normalizados é comparada com um segundo limite. é determinado que um desequilibrio existe quando o valor de fase normalizado mais alto for maior do que o primeiro limite e a razão de valores de fase normalizados for menor do que o segundo limite.Invention Patent: <B> "SYSTEM AND METHOD FOR DETECTING VOLTAGE AND CURRENT IMBALANCE IN AN ELECTRICITY SUPPLY" <D>. A system (Figure 1) and a method (Figure 2) for detecting a current imbalance or voltage imbalance in multiphase electrical energy supplied to a power meter. A single phase 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 limit, and the ratio of normalized phase values is compared to a second limit. it is determined that an imbalance exists when the highest normalized phase value is greater than the first limit and the ratio of normalized phase values is less than the second limit.

BR9814259-3A 1997-12-05 1998-11-18 System and method for detecting voltage and current imbalances in an electricity supply BR9814259A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US6774897P 1997-12-05 1997-12-05
US6781697P 1997-12-05 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 (1)

Publication Number Publication Date
BR9814259A true BR9814259A (en) 2000-10-03

Family

ID=26748217

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9814259-3A BR9814259A (en) 1997-12-05 1998-11-18 System and method for detecting voltage and current imbalances in an electricity 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)

Families Citing this family (3)

* 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
GB2606337A (en) * 2021-03-26 2022-11-09 Airbus Sas apparatus and method for detecting current imbalance

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

Also Published As

Publication number Publication date
AU1594399A (en) 1999-06-28
CA2312723C (en) 2002-06-25
RU2202114C2 (en) 2003-04-10
CA2312723A1 (en) 1999-06-17
WO1999030300A1 (en) 1999-06-17

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Legal Events

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B09B Decision: refusal

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B09B Decision: refusal

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