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 PDFInfo
- 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
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.
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.
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 | |
| US60/067,748 | 1997-12-05 | ||
| US60/067,816 | 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)
| 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)
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4319298A (en) * | 1979-08-28 | 1982-03-09 | General Electric Company | Motor protection device |
-
1998
- 1998-11-18 CA CA002312723A patent/CA2312723C/en not_active Expired - Fee Related
- 1998-11-18 WO PCT/US1998/024780 patent/WO1999030300A1/en active Application Filing
- 1998-11-18 BR BR9814259-3A patent/BR9814259A/en not_active Application Discontinuation
- 1998-11-18 RU RU2000114633A patent/RU2202114C2/en not_active IP Right Cessation
- 1998-11-18 AU AU15943/99A patent/AU1594399A/en not_active Abandoned
Cited By (2)
| 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 |
| AU1594399A (en) | 1999-06-28 |
| CA2312723C (en) | 2002-06-25 |
| RU2202114C2 (en) | 2003-04-10 |
| WO1999030300A1 (en) | 1999-06-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20161118 |