CA2463575A1 - Protective relay capable of protection applications without protection settings - Google Patents
Protective relay capable of protection applications without protection settings Download PDFInfo
- Publication number
- CA2463575A1 CA2463575A1 CA002463575A CA2463575A CA2463575A1 CA 2463575 A1 CA2463575 A1 CA 2463575A1 CA 002463575 A CA002463575 A CA 002463575A CA 2463575 A CA2463575 A CA 2463575A CA 2463575 A1 CA2463575 A1 CA 2463575A1
- Authority
- CA
- Canada
- Prior art keywords
- phase
- current differential
- relay
- local
- remote
- 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
- H02H3/28—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
- H02H3/286—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus involving comparison of similar homopolar quantities
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/30—Staggered disconnection
Abstract
The current differential relay operates without adjustable settings, and includes a phase current differential element with a predetermined threshold, responsive to local phase current values and remote phase current values, to detect three-phase faults and producing a first output signal if the threshold value is exceeded. Either a negative sequence current differential element or two phase current differential elements, also having predetermined threshold values and responsive to the local and remote phase currents, detect phase-to-phase faults and phase-to-phase-to-ground faults and produces a second output signal if the predetermined threshold is exceeded. A negative sequence or zero sequence current differential current element, with a predetermined threshold value is responsive to the local and remote phase currents to detect phase-to-ground faults and to produce a third output signal if the threshold is exceeded. If any one of the first, second and third output signals occurs, a trip signal is generated and directed to the associated circuit breaker. The thresholds are selected to permit use of the relay in a wide range of possible applications.
Claims (15)
1. A current differential protective relay without adjustable operational settings for use in protecting a selected line portion of a power system, comprising:
at least one phase current differential element, having a first predetermined, fixed threshold value, responsive to phase currents from the power system at a local location of the protective relay and to phase currents from a remote relay on the selected line portion, to detect three-phase faults on the line portion and for providing a first output signal when said predetermined threshold is exceeded by three-phase current;
a negative sequence current differential element or two phase current differential elements, having a second predetermined, fixed threshold value, responsive to said local phase currents and said remote phase currents to detect phase-to-phase faults and phase-to-phase-to-ground faults and for providing a second output signal when said second predetermined threshold is exceeded, wherein said two phase current differential elements include said one phase current differential element for detecting three-phase faults, or two additional phase current differential elements; and a negative sequence current differential element or a zero sequence differential element, having a third predetermined, fixed threshold value, responsive to said local phase currents and said remote phase currents to detect individual phase-to-ground faults and providing a third output signal when said third predetermined threshold is exceeded, wherein if a negative sequence current differential element is used, it is either the negative sequence current differential element used for detecting phase-to-phase and phase-to-phase-to-ground faults or a second negative sequence current differential element, wherein none of the current differential elements include adjustable operational settings.
at least one phase current differential element, having a first predetermined, fixed threshold value, responsive to phase currents from the power system at a local location of the protective relay and to phase currents from a remote relay on the selected line portion, to detect three-phase faults on the line portion and for providing a first output signal when said predetermined threshold is exceeded by three-phase current;
a negative sequence current differential element or two phase current differential elements, having a second predetermined, fixed threshold value, responsive to said local phase currents and said remote phase currents to detect phase-to-phase faults and phase-to-phase-to-ground faults and for providing a second output signal when said second predetermined threshold is exceeded, wherein said two phase current differential elements include said one phase current differential element for detecting three-phase faults, or two additional phase current differential elements; and a negative sequence current differential element or a zero sequence differential element, having a third predetermined, fixed threshold value, responsive to said local phase currents and said remote phase currents to detect individual phase-to-ground faults and providing a third output signal when said third predetermined threshold is exceeded, wherein if a negative sequence current differential element is used, it is either the negative sequence current differential element used for detecting phase-to-phase and phase-to-phase-to-ground faults or a second negative sequence current differential element, wherein none of the current differential elements include adjustable operational settings.
2. The protective relay of claim 1, including a gate function responsive to any one of said first, second and third output signals to produce a trip signal for a circuit breaker on the selected line portion.
3. The protective relay of claim 1, including a first phase differential current element for detecting three-phase faults and second and third phase current differential elements for detecting phase-to-phase and phase-to-phase-to-ground faults.
4. The protective relay of claim 1, including a first negative sequence current differential element used for detecting phase-to-phase and phase-to-phase-to-ground faults and a second negative sequence current differential element for detecting phase-to-ground faults.
5. The protective relay of claim 1, including a negative sequence current differential element for detecting phase-to-phase faults and phase-to-phase-to-ground faults and a zero sequence current differential element for detecting phase-to-ground faults.
6. A current differential protective relay without adjustable operational settings for use in protecting a selected line portion of a power system: comprising:
a first current differential protection function, having a first predetermined, fixed threshold, but no adjustable operational setting capability, responsive to phase currents from the power system at a local location of the protective relay on the selected line portion and to phase currents from a remote relay on the selected line portion to detect three-phase faults on the line portion and for providing a first output signal when said first predetermined threshold is exceeded by three phase current;
a second current differential protection function, having a second predetermined, fixed threshold value, but no adjustable operational netting capability, responsive to signals related to said local phase currents and said remote phase currents to detect phase-to-phase and phase-to-phase-to-ground faults and for providing a second output signal when said second predetermined threshold is exceeded; and a third current differential protection function, having a third predetermined, fixed threshold value, but no adjustable operational netting capability, responsive to signals related to said local phase currents and said remote phase currents to detect phase-to~-ground faults and for providing a third output signal when said third predetermined threshold is exceeded.
a first current differential protection function, having a first predetermined, fixed threshold, but no adjustable operational setting capability, responsive to phase currents from the power system at a local location of the protective relay on the selected line portion and to phase currents from a remote relay on the selected line portion to detect three-phase faults on the line portion and for providing a first output signal when said first predetermined threshold is exceeded by three phase current;
a second current differential protection function, having a second predetermined, fixed threshold value, but no adjustable operational netting capability, responsive to signals related to said local phase currents and said remote phase currents to detect phase-to-phase and phase-to-phase-to-ground faults and for providing a second output signal when said second predetermined threshold is exceeded; and a third current differential protection function, having a third predetermined, fixed threshold value, but no adjustable operational netting capability, responsive to signals related to said local phase currents and said remote phase currents to detect phase-to~-ground faults and for providing a third output signal when said third predetermined threshold is exceeded.
7. The protective relay of claim 6, wherein said first differential protection function includes at least one phase differential current element, wherein said second current differential function includes a negative sequence current differential element responsive to negative sequence current values or at least one additional phase current differential element, and wherein said third current differential function includes a negative sequence element or a zero sequence element responsive to negative sequence current values and zero sequence current values, respectively.
8. A protective relay for current differential protection for a selected power lime, comprising:
a local current differential relay for protection of a selected power line portion of a power system, the local current differential relay having the capability of sampling three phase current values from its location on the power line at selected intervals of time and transmitting them to a remote relay also connected to the selected power line for current differential protection, wherein the remote relay is not coordinated with said local current differential relay for protection functions; and a sensing function in the local current differential relay for determining when said relay is connected to a remote relay which has adjustable settings for fault determination, wherein the local current differential relay, upon such determination, disables any protection functions therein while continuing to provide phase current values to the remote relay and to receive trip commands from the remote relay.
a local current differential relay for protection of a selected power line portion of a power system, the local current differential relay having the capability of sampling three phase current values from its location on the power line at selected intervals of time and transmitting them to a remote relay also connected to the selected power line for current differential protection, wherein the remote relay is not coordinated with said local current differential relay for protection functions; and a sensing function in the local current differential relay for determining when said relay is connected to a remote relay which has adjustable settings for fault determination, wherein the local current differential relay, upon such determination, disables any protection functions therein while continuing to provide phase current values to the remote relay and to receive trip commands from the remote relay.
9. A system of claim 8, wherein the sensing function is responsive to a signal from the remote relay, indicating that it has adjustable settings.
10. A system of claim 9, wherein said signal is part of a data packet sent by the remote relay to the current differential relay.
11. A system of claim 9, wherein the signal is part or the format of the data packet.
12. A system of claim e, wherein the local current differential relay is a relay without an adjustable settings capability.
13. A system of claim e, wherein the local current differential relay is a relay having an adjustable settings capability.
14. A system of claim 8, wherein the local current differential relay is not capable of providing any protection functions.
15. A system of claim 8, wherein the selected power line is an intertie.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2682919A CA2682919C (en) | 2003-04-07 | 2004-04-07 | Protective relay capable of protection applications without protection settings |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/409,355 US7123459B2 (en) | 2003-04-07 | 2003-04-07 | Protective relay capable of protection applications without protection settings |
| US10/409,355 | 2003-04-07 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2682919A Division CA2682919C (en) | 2003-04-07 | 2004-04-07 | Protective relay capable of protection applications without protection settings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2463575A1 true CA2463575A1 (en) | 2004-10-07 |
| CA2463575C CA2463575C (en) | 2011-09-13 |
Family
ID=33097830
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2463575A Expired - Fee Related CA2463575C (en) | 2003-04-07 | 2004-04-07 | Protective relay capable of protection applications without protection settings |
| CA2682919A Expired - Fee Related CA2682919C (en) | 2003-04-07 | 2004-04-07 | Protective relay capable of protection applications without protection settings |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2682919A Expired - Fee Related CA2682919C (en) | 2003-04-07 | 2004-04-07 | Protective relay capable of protection applications without protection settings |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US7123459B2 (en) |
| AU (1) | AU2004201474B2 (en) |
| BR (1) | BRPI0402390A (en) |
| CA (2) | CA2463575C (en) |
| MX (1) | MXPA04003328A (en) |
| NZ (1) | NZ532214A (en) |
| ZA (1) | ZA200402726B (en) |
Families Citing this family (43)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7123459B2 (en) * | 2003-04-07 | 2006-10-17 | Schweitzer Engineering Laboratories, Inc. | Protective relay capable of protection applications without protection settings |
| CN100395933C (en) * | 2004-12-24 | 2008-06-18 | 许继集团有限公司 | Method for discriminating directions of fault components in positive / negative sequence, and direction of homopolar power |
| MX2010002163A (en) * | 2007-09-28 | 2010-06-02 | Schweitzer Engineering Lab Inc | Amplitude and phase comparators for line protection. |
| US20090088990A1 (en) * | 2007-09-30 | 2009-04-02 | Schweitzer Iii Edmund O | Synchronized phasor processor for a power system |
| CA2702210C (en) * | 2007-10-09 | 2014-03-18 | Schweitzer Engineering Laboratories, Inc. | Transformer through-fault current monitor |
| US7903381B2 (en) * | 2008-03-11 | 2011-03-08 | Schweitzer Engineering Laboratories, Inc. | Negative sequence differential element |
| EP2289137A1 (en) * | 2008-06-18 | 2011-03-02 | Siemens Aktiengesellschaft | Method and arrangement for generating an error signal |
| ES2754711T3 (en) * | 2008-09-25 | 2020-04-20 | Schneider Electric Ind Sas | Directional detection of a ground fault |
| US8558551B2 (en) * | 2010-04-21 | 2013-10-15 | Schweitzer Engineering Laboratories Inc | Fault location in electric power delivery systems |
| US8717725B2 (en) | 2010-12-02 | 2014-05-06 | Schweitzer Engineering Laboratories Inc | Dual-comparator restricted earth fault protection |
| CN102118023A (en) * | 2011-03-01 | 2011-07-06 | 许继集团有限公司 | Asymmetric identification method of fiber channel for three-terminal differential protection of T connection line |
| US8717721B2 (en) * | 2011-08-25 | 2014-05-06 | Southern States, Llc | High impedance fault isolation system |
| US8791704B2 (en) * | 2011-10-11 | 2014-07-29 | Schweitzer Engineering Laboratories Inc. | Fault-type identification for electric power delivery systems |
| CN102403699B (en) * | 2011-11-08 | 2014-04-23 | 西安交通大学 | Self-adaptive current differential protection method for direct-current lines |
| CN102694375B (en) * | 2012-06-11 | 2014-07-30 | 国家电网公司 | Ultra high-voltage alternating current transmission line protection method based on all-component differential coefficient matrix |
| CN103001196B (en) * | 2012-11-13 | 2015-09-30 | 江苏省电力公司镇江供电公司 | The relay protecting method of excision failure in transformer dead zone |
| CN103063984A (en) * | 2012-12-20 | 2013-04-24 | 北京交通大学 | Power distribution network single-phase earth fault line selection method based on line double-terminal negative sequence current |
| CN103346540B (en) * | 2013-03-25 | 2016-04-27 | 浙江大学 | A kind of hybrid line traveling wave differential protecting method adopting phase current to brake |
| CN103326333B (en) * | 2013-05-24 | 2015-09-16 | 广东电网公司东莞供电局 | A kind of differential protecting method of asymmetric electric transmission line fault and system thereof |
| CN104037738B (en) * | 2013-12-24 | 2018-04-17 | 许继集团有限公司 | 3/2 wiring T areas short leg differential protection starts method and differential protecting method |
| CN104037742A (en) * | 2014-07-09 | 2014-09-10 | 国家电网公司 | Extra-high voltage alternating current transmission line protection method |
| CN104092196B (en) * | 2014-07-15 | 2017-01-18 | 国家电网公司 | Ultra-high voltage alternating-current transmission line relay protection method |
| CN104078950B (en) * | 2014-07-15 | 2017-02-22 | 国家电网公司 | Ultra-high voltage transmission line relay protection method based on positive-sequence break variable differential coefficient matrix |
| CN104319749B (en) * | 2014-11-14 | 2017-04-26 | 国家电网公司 | Line phase-to-phase fault relay protection method based on fault location factor phase characteristics |
| CN104319750B (en) * | 2014-11-14 | 2017-06-27 | 国家电网公司 | Circuit phase fault relay protecting method based on the abort situation factor |
| US9660438B2 (en) | 2014-11-26 | 2017-05-23 | Schweitzer Engineering Laboratories, Inc. | Secure and dependable differential protection for electric power generators |
| CN104716636B (en) * | 2015-03-11 | 2018-02-13 | 国电南瑞科技股份有限公司 | The method for preventing distance protection III sections from making by overload mis-operation |
| CN104701830A (en) * | 2015-03-24 | 2015-06-10 | 北京四方继保自动化股份有限公司 | System and method for identifying overloads and system and method for protecting distances |
| CN104852366B (en) * | 2015-05-20 | 2018-08-24 | 天津大学 | The direct-flow distribution system short trouble guard method of the current limiter containing resistive superconducting |
| CN105140894B (en) * | 2015-08-07 | 2018-09-25 | 许继电气股份有限公司 | A kind of power distribution network differential protecting method based on Phase Difference Principle |
| CN105071346B (en) * | 2015-08-27 | 2017-11-21 | 南京国电南自电网自动化有限公司 | A kind of forward-order current for preventing restricted earth protection malfunction intersects braking method |
| CN105244857B (en) * | 2015-10-10 | 2017-12-19 | 江苏省电力公司苏州供电公司 | Prevent power network distance protection first start after decompression malfunction method |
| CN105391035B (en) * | 2015-12-15 | 2017-11-24 | 华北电力大学 | The differential protection system of transmission line of electricity and guard method based on fault compression |
| CN106526291A (en) * | 2016-11-04 | 2017-03-22 | 国网山东省电力公司潍坊供电公司 | Bypass operation low voltage rapid conversion device, and monitoring, releasing and displaying methods thereof |
| CN106711963B (en) * | 2016-11-17 | 2018-11-20 | 云南电网有限责任公司电力科学研究院 | Multistage route differential protective system and method |
| CN106711964B (en) * | 2016-11-17 | 2018-11-13 | 云南电网有限责任公司电力科学研究院 | Double line terminal differential protective system and method |
| CN107104414B (en) * | 2017-05-04 | 2019-06-11 | 中国南方电网有限责任公司 | A kind of relay protection maintenance aid decision-making method based on online data |
| CN108110737B (en) * | 2017-11-28 | 2019-06-25 | 酒泉钢铁(集团)有限责任公司 | 6-10kV isolated neutral system casing zero sequence optical differential protective relaying device |
| US10859639B2 (en) | 2018-10-02 | 2020-12-08 | Schweitzer Engineering Laboratories, Inc. | Fault-type identification in an electric power delivery system using composite signals |
| US11177645B2 (en) | 2019-11-22 | 2021-11-16 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for improving restricted earth fault protection |
| US11469588B2 (en) | 2020-08-31 | 2022-10-11 | Schweitzer Engineering Laboratories, Inc. | Electric power system differential protection with DC compensation |
| US11411390B2 (en) | 2020-12-31 | 2022-08-09 | Schweitzer Engineering Laboratories, Inc. | Secure and dependable restricted earth fault protection for electric power generators and transformers |
| CN113725826B (en) * | 2021-04-19 | 2023-12-05 | 保定钰鑫电气科技有限公司 | Fault processing method for interphase short circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4538196A (en) * | 1983-04-22 | 1985-08-27 | Westinghouse Electric Corp. | Protective relay apparatus and method for providing single-pole tripping |
| US4795983A (en) * | 1988-03-07 | 1989-01-03 | Westinghouse Electric Corp. | Method and apparatus for identifying a faulted phase |
| US4896241A (en) * | 1989-02-28 | 1990-01-23 | Westinghouse Electric Corp. | Directional comparison blocking protective relay system |
| US5793750A (en) * | 1995-10-20 | 1998-08-11 | Schweitzer Engineering Laboratories, Inc. | System of communicating output function status indications between two or more power system protective relays |
| US7123459B2 (en) * | 2003-04-07 | 2006-10-17 | Schweitzer Engineering Laboratories, Inc. | Protective relay capable of protection applications without protection settings |
-
2003
- 2003-04-07 US US10/409,355 patent/US7123459B2/en not_active Expired - Lifetime
-
2004
- 2004-04-07 AU AU2004201474A patent/AU2004201474B2/en not_active Ceased
- 2004-04-07 NZ NZ532214A patent/NZ532214A/en not_active IP Right Cessation
- 2004-04-07 CA CA2463575A patent/CA2463575C/en not_active Expired - Fee Related
- 2004-04-07 CA CA2682919A patent/CA2682919C/en not_active Expired - Fee Related
- 2004-04-07 MX MXPA04003328A patent/MXPA04003328A/en active IP Right Grant
- 2004-04-07 ZA ZA2004/02726A patent/ZA200402726B/en unknown
- 2004-04-07 BR BR0402390-0A patent/BRPI0402390A/en not_active Application Discontinuation
-
2006
- 2006-10-16 US US11/582,257 patent/US7375941B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| AU2004201474B2 (en) | 2009-01-08 |
| NZ532214A (en) | 2004-11-26 |
| US20040196603A1 (en) | 2004-10-07 |
| CA2463575C (en) | 2011-09-13 |
| BRPI0402390A (en) | 2004-12-07 |
| US7375941B2 (en) | 2008-05-20 |
| MXPA04003328A (en) | 2006-04-27 |
| US7123459B2 (en) | 2006-10-17 |
| ZA200402726B (en) | 2005-07-27 |
| CA2682919C (en) | 2010-10-12 |
| AU2004201474A1 (en) | 2004-10-21 |
| CA2682919A1 (en) | 2004-10-07 |
| US20070035902A1 (en) | 2007-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20170407 |