CA2579700A1 - Systems and methods for protection of electrical networks - Google Patents
Systems and methods for protection of electrical networksInfo
- Publication number
- CA2579700A1 CA2579700A1 CA002579700A CA2579700A CA2579700A1 CA 2579700 A1 CA2579700 A1 CA 2579700A1 CA 002579700 A CA002579700 A CA 002579700A CA 2579700 A CA2579700 A CA 2579700A CA 2579700 A1 CA2579700 A1 CA 2579700A1
- Authority
- CA
- Canada
- Prior art keywords
- swing
- electrical network
- occurrence
- power swing
- center 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
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
Abstract
A system and method for accomplishing power swing blocking and unstable power swing tripping schemes during disturbances of electrical networks is disclosed. The disclosed system and method eliminates the requirement of stability studies. The no-setting scheme utilizes the swing center voltage of the electrical network to carry out its functions.
Claims (17)
1. A power swing detection system for use in conjunction with blocking at least one relay from operating in an electrical network, comprising:
a swing center voltage slope detector designed to detect an occurrence of a power swing within the electrical network based upon a time rate change of a swing center voltage value for the electrical network;
a swing signature detector operatively connected to said swing center voltage slope detector designed to distinguish between an occurrence of a power swing within the electrical network and an occurrence of a fault within the electrical network, said swing signature detector designed to detect the occurrence of a power swing within the electrical network under circumstances wherein the swing center voltage slope detector does not detect the occurrence of said power swing, said swing signature detector designed to detect an occurrence of a power swing within the electrical network based upon a time rate of change of a swing center voltage value for the electrical network; and a dependable power swing detector operatively connected to said swing center voltage slope detector and said swing signature detector designed to detect an occurrence of a power swing within the electrical network when conditions exist within said electrical network that would not permit said swing center voltage slope detector and said swing signature detector to detect said occurrence of said power swing within a predetermined period of time, said dependable power swing detector, upon detection of said occurrence of said power swing, asserting a temporary signal for a predetermined period of time to permit said swing center voltage slope detector to detect said occurrence of said power swing and thereby compensating for a pickup delay of said swing center voltage slope detector.
a swing center voltage slope detector designed to detect an occurrence of a power swing within the electrical network based upon a time rate change of a swing center voltage value for the electrical network;
a swing signature detector operatively connected to said swing center voltage slope detector designed to distinguish between an occurrence of a power swing within the electrical network and an occurrence of a fault within the electrical network, said swing signature detector designed to detect the occurrence of a power swing within the electrical network under circumstances wherein the swing center voltage slope detector does not detect the occurrence of said power swing, said swing signature detector designed to detect an occurrence of a power swing within the electrical network based upon a time rate of change of a swing center voltage value for the electrical network; and a dependable power swing detector operatively connected to said swing center voltage slope detector and said swing signature detector designed to detect an occurrence of a power swing within the electrical network when conditions exist within said electrical network that would not permit said swing center voltage slope detector and said swing signature detector to detect said occurrence of said power swing within a predetermined period of time, said dependable power swing detector, upon detection of said occurrence of said power swing, asserting a temporary signal for a predetermined period of time to permit said swing center voltage slope detector to detect said occurrence of said power swing and thereby compensating for a pickup delay of said swing center voltage slope detector.
2. The power swing detection system of claim 1 further comprising reset logic operatively connected to said swing center voltage slope detector, said swing signature detector and said dependable power swing detector, said reset logic designed to reset a signal generated in response to detection of said occurrence of said power swing by said power swing detection system.
3. The power swing detection system of claim 1 further comprising a three-phase fault detector operatively connected to said swing center voltage slope detector, said swing signature detector and said dependable power swing detector, said three-phase fault detector designed to detect an occurrence of a three-phase fault within said electrical network and, in response, inhibit generation of a signal otherwise generated in response to detection of said occurrence of said power swing by said power swing detection system.
4. The power swing detection system of claim 1 wherein said swing center voltage value corresponds to a true swing center voltage for said electrical network.
5. The power swing detection system of claim 1 wherein said swing center voltage value corresponds to an approximate swing center voltage for said electrical network.
6. The power swing detection system of claim 1 wherein said swing center voltage slope detector generates a signal indicative of detection of an occurrence of a power swing in response to detection that an absolute value of a positive-sequence swing center voltage time rate of change for said electrical network is within a first predetermined range defined by a first maximum threshold and a first minimum threshold, in response to detection that a magnitude of a positive-sequence swing center voltage is within a second predetermined range defined by a second maximum threshold and a second minimum threshold, and in response to detection that a positive sequence impedance measured by a distance element is within a third predetermined range.
7. The power swing detection system of claim 1 wherein said swing signature detector compares a threshold based upon a maximum measurement of an absolute value of a positive-sequence swing center voltage time rate of change for said electrical network from a select plurality of such measurements to a plurality of measurements of an absolute value of a positive-sequence swing center voltage time rate of change for said electrical network to determine whether a discontinuity has occurred within a waveform for the positive-sequence swing center voltage of said electrical network.
8. The power swing detection system of claim 7 wherein said swing signature detector detects an occurrence of a fault within said electrical network in response to determining that a discontinuity has occurred within a waveform for the positive swing center voltage of said electrical network.
9. The power swing detection system of claim 8 wherein said swing signature detector may detect an occurrence of a power swing within said electrical network in response to determining that no discontinuity has occurred within said waveform for the positive swing center voltage of said electrical network.
10. The power swing detection system of claim 1 wherein said dependable power swing detector measures a second derivative time rate of change of a swing center voltage value for the electrical network to enable detection of an occurrence of a power swing within the electrical network under predetermined network conditions.
11. A method of detecting an occurrence of a power swing within an electrical network, comprising the steps of:
employing a first power swing detector to detect said occurrence of said power swing within the electrical network based upon a time rate change of a swing center voltage value for the electrical network;
employing a second power swing detector to distinguish between an occurrence of a power swing within the electrical network and an occurrence of a fault within the electrical network and detecting the occurrence of a power swing within the electrical network under circumstances wherein the first power swing detector does not detect the occurrence of said power swing, said second power swing detector detecting said occurrence of said power swing within the electrical network based upon a time rate of change of a swing center voltage value for the electrical network; and employing a third power swing detector to detect said occurrence of said power swing within the electrical network when conditions exist within said electrical network that would not permit said first and second power swing detectors to detect said occurrence of said power swing within a predetermined period of time, said third power swing detector, upon detection of said occurrence of said power swing, asserting a temporary signal for a predetermined period of time to permit one of said first and second power swing detectors to detect said occurrence of said power swing and thereby compensating for a pickup delay of said one of said first and second power swing detectors.
employing a first power swing detector to detect said occurrence of said power swing within the electrical network based upon a time rate change of a swing center voltage value for the electrical network;
employing a second power swing detector to distinguish between an occurrence of a power swing within the electrical network and an occurrence of a fault within the electrical network and detecting the occurrence of a power swing within the electrical network under circumstances wherein the first power swing detector does not detect the occurrence of said power swing, said second power swing detector detecting said occurrence of said power swing within the electrical network based upon a time rate of change of a swing center voltage value for the electrical network; and employing a third power swing detector to detect said occurrence of said power swing within the electrical network when conditions exist within said electrical network that would not permit said first and second power swing detectors to detect said occurrence of said power swing within a predetermined period of time, said third power swing detector, upon detection of said occurrence of said power swing, asserting a temporary signal for a predetermined period of time to permit one of said first and second power swing detectors to detect said occurrence of said power swing and thereby compensating for a pickup delay of said one of said first and second power swing detectors.
12. A method of enabling detection of an occurrence of a power swing within an electrical network, comprising the steps of:
measuring a plurality of absolute values of a positive-sequence swing center voltage time rate of change for said electrical network;
selecting a threshold based upon a maximum measurement taken from said plurality of absolute values of a positive-sequence swing center voltage time rate of change for said electrical network;
comparing said threshold to said plurality of absolute values of a positive-sequence swing center voltage time rate of change for said electrical network;
determining whether a discontinuity has occurred within a waveform for the positive-sequence swing center voltage of said electrical network based upon said comparing step; and enabling detection of said occurrence of said power swing within said electrical network in response to determining that said discontinuity has not occurred within said waveform for the positive-sequence swing center voltage of said electrical network.
measuring a plurality of absolute values of a positive-sequence swing center voltage time rate of change for said electrical network;
selecting a threshold based upon a maximum measurement taken from said plurality of absolute values of a positive-sequence swing center voltage time rate of change for said electrical network;
comparing said threshold to said plurality of absolute values of a positive-sequence swing center voltage time rate of change for said electrical network;
determining whether a discontinuity has occurred within a waveform for the positive-sequence swing center voltage of said electrical network based upon said comparing step; and enabling detection of said occurrence of said power swing within said electrical network in response to determining that said discontinuity has not occurred within said waveform for the positive-sequence swing center voltage of said electrical network.
13. The method of claim 12 further comprising the step of detecting an occurrence of a fault within said electrical network in response to determining that said discontinuity has occurred within said waveform for the positive-sequence swing center voltage of said electrical network.
14. A method of detecting an occurrence of a fault within an electrical network, comprising the steps of:
measuring a plurality of absolute values of a positive-sequence swing center voltage time rate of change for said electrical network;
selecting a threshold based upon a maximum measurement taken from said plurality of absolute values of a positive-sequence swing center voltage time rate of change for said electrical network;
comparing said threshold to said plurality of absolute values of a positive-sequence swing center voltage time rate of change for said electrical network;
determining whether a discontinuity has occurred within a waveform for the positive-sequence swing center voltage of said electrical network based upon said comparing step; and detecting said occurrence of said fault within said electrical network in response to determining that said discontinuity has occurred within said waveform for the positive-sequence swing center voltage of said electrical network.
measuring a plurality of absolute values of a positive-sequence swing center voltage time rate of change for said electrical network;
selecting a threshold based upon a maximum measurement taken from said plurality of absolute values of a positive-sequence swing center voltage time rate of change for said electrical network;
comparing said threshold to said plurality of absolute values of a positive-sequence swing center voltage time rate of change for said electrical network;
determining whether a discontinuity has occurred within a waveform for the positive-sequence swing center voltage of said electrical network based upon said comparing step; and detecting said occurrence of said fault within said electrical network in response to determining that said discontinuity has occurred within said waveform for the positive-sequence swing center voltage of said electrical network.
15. A method of detecting an occurrence of a power swing within an electrical network having multiple phases, comprising the steps of:
detecting a multi-phase fault within said electrical network;
in response to said multi-phase fault being present within said electrical network for a predetermined period of time, enabling detection of said occurrence of said power swing;
sampling measurements of a second time derivative of a swing center voltage value of said electrical network;
determining whether a predetermined sudden change has occurred within said sampled measurements of said second time derivative of said swing center voltage value of said electrical network; and detecting said occurrence of said power swing within said electrical network in response to determining that said predetermined sudden change has occurred within said sampled measurements of said second time derivative of said swing center voltage value of said electrical network.
detecting a multi-phase fault within said electrical network;
in response to said multi-phase fault being present within said electrical network for a predetermined period of time, enabling detection of said occurrence of said power swing;
sampling measurements of a second time derivative of a swing center voltage value of said electrical network;
determining whether a predetermined sudden change has occurred within said sampled measurements of said second time derivative of said swing center voltage value of said electrical network; and detecting said occurrence of said power swing within said electrical network in response to determining that said predetermined sudden change has occurred within said sampled measurements of said second time derivative of said swing center voltage value of said electrical network.
16. An unstable power swing detection system for use in conjunction of permitting separation of at least one zone within an electrical network from a remainder of said electrical network, comprising:
a no-setting power swing detector designed to detect an occurrence of a power swing within said electrical network, said no-setting power swing detector generating a power swing detection signal upon detection of said power swing; and an unstable power swing detector operatively coupled to said no-setting power swing detector and designed to track a trajectory of a complex impedance within a predetermined complex plane designated for said electrical network, said unstable power swing detector generating a signal indicative of an occurrence of an unstable power swing within said electrical network upon receipt of said power swing detection signal from said power no-setting power swing detector and upon detection that said trajectory of said complex impedance has moved entirely across said predetermined complex plane designated for said electrical network.
a no-setting power swing detector designed to detect an occurrence of a power swing within said electrical network, said no-setting power swing detector generating a power swing detection signal upon detection of said power swing; and an unstable power swing detector operatively coupled to said no-setting power swing detector and designed to track a trajectory of a complex impedance within a predetermined complex plane designated for said electrical network, said unstable power swing detector generating a signal indicative of an occurrence of an unstable power swing within said electrical network upon receipt of said power swing detection signal from said power no-setting power swing detector and upon detection that said trajectory of said complex impedance has moved entirely across said predetermined complex plane designated for said electrical network.
17. A method for detecting an occurrence of an unstable power swing, comprising the steps of:
detecting an occurrence of a power swing within said electrical network by employing a no-setting power swing detector;
tracking a trajectory of a complex impedance within a predetermined complex plane designated for said electrical network;
detecting that said trajectory of said complex impedance has moved entirely across said predetermined complex plane designated for said electrical network; and determining that said unstable power swing has occurred based upon said detecting steps.
detecting an occurrence of a power swing within said electrical network by employing a no-setting power swing detector;
tracking a trajectory of a complex impedance within a predetermined complex plane designated for said electrical network;
detecting that said trajectory of said complex impedance has moved entirely across said predetermined complex plane designated for said electrical network; and determining that said unstable power swing has occurred based upon said detecting steps.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US61406604P | 2004-09-29 | 2004-09-29 | |
| US60/614,066 | 2004-09-29 | ||
| US11/236,352 US7457088B2 (en) | 2004-09-29 | 2005-09-27 | Systems and methods for protection of electrical networks |
| US11/236,352 | 2005-09-27 | ||
| PCT/US2005/034401 WO2006039233A2 (en) | 2004-09-29 | 2005-09-28 | Systems and methods for protection of electrical networks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2579700A1 true CA2579700A1 (en) | 2006-04-13 |
| CA2579700C CA2579700C (en) | 2010-05-04 |
Family
ID=36098838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2579700A Expired - Fee Related CA2579700C (en) | 2004-09-29 | 2005-09-28 | Systems and methods for protection of electrical networks |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7457088B2 (en) |
| CA (1) | CA2579700C (en) |
| MX (1) | MX2007003801A (en) |
| WO (1) | WO2006039233A2 (en) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7930117B2 (en) * | 2007-09-28 | 2011-04-19 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for power swing and out-of-step detection using time stamped data |
| US7987059B2 (en) * | 2007-10-09 | 2011-07-26 | Schweitzer Engineering Laboratories, Inc | Real-time power system oscillation detection using modal analysis |
| US8204632B2 (en) * | 2008-06-03 | 2012-06-19 | Electric Power Research Institute, Inc. | Emergency frequency load shedding scheme |
| US8451570B2 (en) * | 2008-06-26 | 2013-05-28 | Siemens Aktiengesellshaft | Method for production of an oscillating signal and of an electrical protection device or measurement instrument having an oscillation identification device |
| EP2301128B1 (en) * | 2008-07-17 | 2017-03-22 | Siemens Aktiengesellschaft | Method for producing a fault signal and electric protective device |
| RU2503111C2 (en) * | 2009-06-15 | 2013-12-27 | Абб Текнолоджи Аг | Device for protection of equipment of power system |
| US8554385B2 (en) * | 2009-09-11 | 2013-10-08 | Schweitzer Engineering Laboratories Inc. | Systems and methods for monitoring and controlling electrical system stability |
| US10063059B2 (en) * | 2009-10-27 | 2018-08-28 | Vestas Wind Systems A/S | Wind power plant with optimal power output |
| US9568535B2 (en) * | 2011-11-04 | 2017-02-14 | Abb Research Ltd. | Methods for detecting an open current transformer |
| US8773829B2 (en) * | 2012-10-31 | 2014-07-08 | General Electric Company | Method and system for power swing detection in a generator |
| MX2015010240A (en) | 2013-02-14 | 2015-10-29 | Schweitzer Engineering Lab Inc | Detection of poorly damped oscillation modes. |
| MX2015009588A (en) | 2013-02-26 | 2015-11-25 | Schweitzer Engineering Lab Inc | State trajectory prediction in an electric power delivery system. |
| AT514024A1 (en) * | 2013-02-28 | 2014-09-15 | Ge Jenbacher Gmbh & Co Og | Pole slip detection method |
| US10333312B2 (en) * | 2013-06-26 | 2019-06-25 | Schweitzer Engineering Laboratories, Inc. | Distributed control in electric power delivery systems |
| US10024920B2 (en) * | 2013-08-16 | 2018-07-17 | General Electric Company | Systems and methods for swing angle estimation in an electrical power system |
| US10436823B2 (en) * | 2013-08-16 | 2019-10-08 | General Electric Company | Systems and methods for swing angle estimation in an electrical power system |
| JP6165086B2 (en) * | 2014-03-10 | 2017-07-19 | 三菱電機株式会社 | Step-out prediction apparatus and step-out prediction method |
| CA2907443C (en) * | 2014-10-21 | 2023-03-21 | General Electric Company | Systems and methods for swing angle estimation in an electrical power system |
| DE102015202493B4 (en) * | 2015-02-12 | 2018-02-01 | Siemens Aktiengesellschaft | Distance protection device and method for monitoring an electrical power transmission line and for generating an error signal in the event of a fault on the power transmission line |
| US10495677B2 (en) * | 2015-05-14 | 2019-12-03 | General Electric Technology Gmbh | Angle-based management of a power grid system |
| EP3375065A4 (en) * | 2015-11-09 | 2019-09-04 | ABB Schweiz AG | Electrical system protection strategy using slip frequency calculation |
| CN106249105B (en) * | 2016-08-02 | 2019-03-01 | 华北电力大学 | A kind of power system oscillation identifying system and its method |
| US10594138B2 (en) | 2016-10-04 | 2020-03-17 | Schweitzer Engineering Laboratories, Inc. | Detection and remediation of transients in electric power systems |
| AT520806B1 (en) * | 2018-01-11 | 2021-02-15 | Sprecher Automation Gmbh | Procedure for triggering a distance protection relay monitoring a zone |
| US11018497B2 (en) * | 2019-04-09 | 2021-05-25 | Schweitzer Engineering Laboratories, Inc. | In-phase motor bus transfer |
| US11736051B2 (en) | 2021-08-05 | 2023-08-22 | Schweitzer Engineering Laboratories, Inc. | Synchronous motor startup configuration to synchronous mode at a field zero-crossing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0057948B1 (en) | 1981-02-11 | 1985-11-27 | BBC Aktiengesellschaft Brown, Boveri & Cie. | Method of protecting electric networks in case of oscillations by means of a blocking device, and blocking device for carrying out this method |
| US5731943A (en) * | 1996-01-04 | 1998-03-24 | Schweitzer Engineering Laboratories, Inc. | Protective relay having out-of-step logic capability |
| US6519537B1 (en) * | 2000-05-09 | 2003-02-11 | Eaton Corporation | Apparatus providing on-line indication of frequency of an AC electric power system |
| US6833711B1 (en) * | 2003-08-01 | 2004-12-21 | Schweitzer Engineering Laboratories, Inc. | Protective relay for powers systems having dependable out-of-step blocking capability |
-
2005
- 2005-09-27 US US11/236,352 patent/US7457088B2/en active Active
- 2005-09-28 WO PCT/US2005/034401 patent/WO2006039233A2/en active Application Filing
- 2005-09-28 MX MX2007003801A patent/MX2007003801A/en active IP Right Grant
- 2005-09-28 CA CA2579700A patent/CA2579700C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| MX2007003801A (en) | 2007-07-11 |
| US20060067095A1 (en) | 2006-03-30 |
| CA2579700C (en) | 2010-05-04 |
| US7457088B2 (en) | 2008-11-25 |
| WO2006039233A3 (en) | 2007-12-27 |
| WO2006039233A2 (en) | 2006-04-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20170928 |