CN100392936C - Integration protection system based on distance algorithm - Google Patents
Integration protection system based on distance algorithm Download PDFInfo
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- CN100392936C CN100392936C CNB2006100122540A CN200610012254A CN100392936C CN 100392936 C CN100392936 C CN 100392936C CN B2006100122540 A CNB2006100122540 A CN B2006100122540A CN 200610012254 A CN200610012254 A CN 200610012254A CN 100392936 C CN100392936 C CN 100392936C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention relates to an integrated protective system based on distance algorithm. The present invention is composed of three major parts of an interface unit, a redundant integrated protective unit based on distance algorithm, a fiber optic network communication unit. An integrated relay unit installed in each substation is connected with each transmission line by CT and PT, and meanwhile, the integrated relay unit is connected to a substation communication network through which a contiguous substation communicates with a central protective control unit. When a fault happens within the range of a I section, the instantaneous trip of protection happens. When the fault is detected to be within the protective range of a II section, a relay communicates with a far-end related relay to determine whether the action is continuously conducted or the relay returns. The present invention has the advantages and effects that the integrated protection can uniformly protect each line section which is connected with the substation; the direction discrimination, the fault phase discrimination, corresponding distance algorithm, etc., are all integrated in the integrated relay unit with a plurality of distance protection constant values, and the present invention can cover the whole protective circuit; the present invention can obtain information from a plurality of transmission lines of a plurality of substations.
Description
Technical field
The present invention relates to a kind of power protection system and guard method thereof, more particularly relate to a kind of relay protection of transmission line system and guard method thereof, belong to the line protection technical field.
Background technology
Along with the progress of modern technologies, the electric system protection device technology has developed into the microprocessor formula from electromechanical, transistor type, ic-type.At present, in the protecting electrical power system field, progressively replace traditional relay based on the digital relay of microprocessor.In the later stage in the eighties of last century sixties, the U.S. has introduced the Rockefeller a kind of centralized transforming plant protecting system based on central computer system.This protection scheme provides an ideal environment to carry out comprehensive integrated protection, and protective device not only monitors the self-contained unit of power plant's (station), and monitors whole network.But up to now, this idea is not thrown people's practicality as yet, and is why like this, is that computer hardware, software and the communication technology are not still supported such idea because of the past period.
Application and development along with the computer relaying protection for transmission line, transformer and generator etc., for the concentrated protection that acquires a certain degree, have had increasing defencive function to be combined in the protection equipment.For example, computer line protection can with apart from or electric current etc. to have a protection of difference in functionality integrated as main protection, also can be with integrated protection in support such as direction protection and overcurrent protection.Yet these protections all are based on independent electric equipment and install, and are still bringing into play leading role based on the various protection philosophies of power frequency component.
Summary of the invention
Purpose of the present invention is enriched the development in relaying protection field, and is proposed a kind of integrated protection system based on distance algorithm in order to replenish prior art.It is by interface unit, form based on redundant integrated protection unit, the fiber optic network communication unit three parts of distance algorithm.Sensors of various types is connected in various device by several interface units; convert analog and digital signal to light signal; deliver to redundant integrated protection unit based on distance algorithm by the fiber optic network communication unit, interface unit can receive and transmit control signal by loop control simultaneously.The integrated protection unit is installed in the B1 of transformer station, B2, B3, can both play a protective role to every the circuit that is connected in transformer station, and each transformer station integrated protection unit can communicate by the fiber optic network communication unit; The fiber optic network communication unit is not only with interface unit, link to each other based on the redundant integrated protection unit of distance algorithm; and be connected to communication gate, man-machine dialogue interface and GPS (Global Position System) gps clock, use the network communication protocol of standard will make the IEDs smart machine of different vendor's production easily in being connected with system.
Integrated protection unit based on distance algorithm is to have source protection equipment to be integrated in the protection relay with a plurality of in the transformer station; form centralized relaying protection system; to measure all transmission line malfunction impedances in the protecting network, integrated protection unit internal structure selects phase, distance algorithm calculating, action decision-making and a multichannel communication unit to form by fault direction detection, fault.This integrated protection unit links to each other with each transmission line with PT by CT, also is connected in the substation communication network that communicates with adjacent substations and central authorities' protection control unit simultaneously; The corresponding actions of integrated protection unit depends on abort situation whether in the scope of setting, and send fault message to the integrated protection unit of far-end so that realize vertical connection tripping operation.Based on above-mentioned integrated protection system, integrated protection system all can be implemented protection to every the part of path that is connected in transformer station; Discriminating direction, choosing phase and corresponding distance algorithm etc. all are melted in the integrated protection unit with a plurality of distance protection definite values, in the hope of covering the whole protecting circuit.
Guard method of the present invention is achieved by the following technical solution, and the steps include:
(1) when fault occurs on arbitrary the circuit that is connected with transformer station, faulty line and fault direction will at first be determined in the integrated protection unit, then determine its fault phase;
(2) distance algorithm with relevant definite value will be used for faulty line/to determine abort situation;
(3) if when detecting I segment protect scope fault; the instantaneous tripping operation of integrated protection unit meeting; when detecting when being fault in the II segment protect scope, the integrated protection unit can communicate the integrated protection unit relevant with far-end, continues action or returns determining whether.
The present invention compared with prior art has following advantage and benefit:
Integrated protection all can be implemented protection to every the part of path that is connected in transformer station; Discriminating direction, fault are differentiated mutually with corresponding distance algorithm etc. and all are melted in the integrated protection unit with a plurality of distance protection definite values, can cover the whole protecting circuit; Information from a plurality of transmission line of a plurality of transformer stations is obtained can be used to derive new protection philosophy and scheme, with respect to existing independent protective technology based on independent electric equipment, has remarkable advantages, has broad application prospects in electric power system.
Description of drawings
Fig. 1 is the framework map of integrated protection system of the present invention;
Fig. 2 is the typical electric power system diagram of guard method of the present invention;
Fig. 3 is the structural representation of integrated protection of the present invention unit.
Embodiment:
The invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, integrated protection system is mainly by constituting with the lower part:
(1) interface unit---this is a measure-controlling unit, is connected in each equipment by sensors of various types, such as traditional CT and PT, and light mixing instrument transformer.Convert analog and digital signal to light signal, the integrated protection unit and the central authorities that deliver to based on distance algorithm by the fiber optic network communication unit protect control unit;
(2) fiber optic network communication unit, this fiber optic network communication unit not only links to each other with the integrated protection unit with interface unit, and be connected to some other equipment, such as communication gate, man-machine dialogue interface and GPS (Global Position System) gps clock. use the network communication protocol of standard will make the IEDs smart machine of different vendor's production easily in being connected with system;
(3) the integrated protection unit receives from the metrical information of transformer station various places and the information that comes from each relevant transformer station that transmits by Communication Gateway by network.The integrated protection unit calculates immediately, analyzes and judges, to determine in this transformer station or whether coupled circuit has fault to take place.Occur if detected fault, this integrated protection unit will send instruction, the circuit breaker that tripping is relevant.
As shown in Figure 2, provide the typical electric power system of a guard method of the present invention.
Integrated protection unit IDR is installed on the bus end of each B1 of transformer station, B2, B3, and is connected with an electric power system with CT by PT, and PT is connected the bus end, and CT then is installed in each outlet that links to each other with bus.Collection a plurality of setpoint distance algorithms in integrated protection unit are one, are melted in the integrated protection unit, to implement the protection to each circuit that is connected in the bus end.These equipment comprise the I section corresponding to every circuit, II section and III segment protect.
When breaking down in the system, the F1 place of circuit 1 as shown in Figure 2 breaks down, and integrated protection unit IDR1 and the IDR2 approaching with abort situation will detect this fault message by distance algorithm; Then fault direction, regional extent and fault can be determined mutually in each integrated protection unit; If fault is in I segment protect scope, IDR1 and IDR2 understand instantaneous tripping operation in two integrated protection unit; And for exceeding I segment protect scope and the fault in II segment protect scope, such as the vertical trip signal that is sent by faulty line integrated protection unit IDR2 can be waited in IDR1 integrated protection unit.
As shown in Figure 3, be integrated protection cellular construction schematic diagram of the present invention, select phase, distance algorithm to calculate and the action decision-making by fault direction detection, fault respectively, and a multichannel communication unit formed.
The multichannel communication unit sends and receives the signal from each the integrated protection unit IDR that is connected in circuit, has only " opening " and " pass " two kinds of signals, is used to describe trip signal.
In case the integrated protection unit detects fault message, at first determine faulty line and fault direction, then choose fault mutually and calculate the distance protection scope, all before entering tripping operation action decision-making, carry out.This action decision-making will determine whether instantaneous tripping faulty line (for the I segment fault) still continues to wait for the vertical trip signal that sends from the relevant integrated protection unit IDR of far-end.
The present invention is applied to power system transmission line, and the interface unit in the integrated protection system, integrated protection unit and communication gate are had independently hardware, connects by the fiber optic network communication unit.
Above-mentioned instantiation has been described in realization in order to demonstrate the invention.Should be understood that other variations of the present invention and modification it will be apparent to those skilled in the art that the present invention is not limited to described embodiment.Therefore, at the true spirit of the disclosed content of the present invention and any/all modifications, variation or the equivalent transformation in the basic principle scope, all belong to claim protection range of the present invention.
Claims (3)
1. integrated protection system based on distance algorithm is characterized in that: it is by interface unit, form based on redundant integrated protection unit, the fiber optic network communication unit three parts of distance algorithm; Sensors of various types is connected in various device by several interface units, convert analog and digital signal to light signal, deliver to redundant integrated protection unit based on distance algorithm by the fiber optic network communication unit, interface unit can receive and transmit control signal by loop control simultaneously; The integrated protection unit is installed in transformer station (B1, B2, B3), can both play a protective role to every the circuit that is connected in transformer station, and each transformer station integrated protection unit can communicate by the fiber optic network communication unit; The fiber optic network communication unit is not only with interface unit, link to each other based on the redundant integrated protection unit of distance algorithm; and be connected to communication gate, man-machine dialogue interface and GPS (Global Position System) gps clock, use the network communication protocol of standard that the IEDs smart machine of different vendor's production will be connected with system.
2. the integrated protection system based on distance algorithm according to claim 1, it is characterized in that: the integrated protection unit is to have source protection equipment to be integrated in the protection relay with a plurality of in the transformer station, form centralized relaying protection system, to measure all transmission line malfunction impedances in the protecting network, integrated protection unit internal structure selects phase, distance algorithm calculating, action decision-making and a multichannel communication unit to form by fault direction detection, fault; The integrated protection unit links to each other with each transmission line with PT by CT, also is connected in the substation communication network that communicates with adjacent substations and central authorities' protection control unit simultaneously; The corresponding actions of integrated protection unit depends on abort situation whether in the scope of setting, and send fault message to the integrated protection unit of far-end so that realize vertical connection tripping operation; Based on above-mentioned integrated protection system, integrated protection system all can be implemented protection to every the part of path that is connected in transformer station; Discriminating direction, choosing phase and corresponding distance algorithm all are melted in the integrated protection unit with a plurality of distance protection definite values, in the hope of covering the whole protecting circuit.
3. for realizing the guard method of claim 1 or 2 described integrated protection systems based on distance algorithm, its feature is comprising the steps:
The first step, when fault occurs on arbitrary the circuit that is connected with transformer station, faulty line and fault direction will at first be determined in the integrated protection unit, then determine its fault phase;
Second step, the distance algorithm with relevant definite value will be used for faulty line or fault with definite abort situation;
If the 3rd step is when detecting I segment protect scope fault; the instantaneous tripping operation of integrated protection unit meeting; when detecting when being fault in the II segment protect scope, the integrated protection unit can communicate the integrated protection unit relevant with far-end, continues action or returns determining whether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100122540A CN100392936C (en) | 2006-06-15 | 2006-06-15 | Integration protection system based on distance algorithm |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100122540A CN100392936C (en) | 2006-06-15 | 2006-06-15 | Integration protection system based on distance algorithm |
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| CN1885662A CN1885662A (en) | 2006-12-27 |
| CN100392936C true CN100392936C (en) | 2008-06-04 |
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| CNB2006100122540A Expired - Fee Related CN100392936C (en) | 2006-06-15 | 2006-06-15 | Integration protection system based on distance algorithm |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7599161B2 (en) * | 2006-12-29 | 2009-10-06 | General Electric Company | Relay device and corresponding method |
| US7542256B2 (en) * | 2006-12-29 | 2009-06-02 | General Electric Company | Relay device and corresponding method |
| CN101158847B (en) * | 2007-08-23 | 2011-10-26 | 济钢集团有限公司 | Electric power substation software emulation platform building method and no power off upgrading improved method |
| CN104167717B (en) * | 2013-05-15 | 2017-10-20 | 南京南瑞继保电气有限公司 | A kind of fast area distance relay based on regional power grid information |
| CN111009886B (en) * | 2019-11-20 | 2022-04-01 | 金诗瑶 | Remote-set power protection method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0284546A1 (en) * | 1987-03-23 | 1988-09-28 | Siemens Aktiengesellschaft | Method of testing assemblies |
| CN1472858A (en) * | 2003-07-09 | 2004-02-04 | 北京四方继保自动化有限公司 | Circuit breakdown and oscillation identifying method based on resistance change rule |
| US6845333B2 (en) * | 2002-04-17 | 2005-01-18 | Schweitzer Engineering Laboratories, Inc. | Protective relay with synchronized phasor measurement capability for use in electric power systems |
| CN1595750A (en) * | 2004-07-07 | 2005-03-16 | 江苏省电力公司苏州供电公司 | 220 thousand volt high-voltage T-connection line three-side longitudinal protection device |
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2006
- 2006-06-15 CN CNB2006100122540A patent/CN100392936C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0284546A1 (en) * | 1987-03-23 | 1988-09-28 | Siemens Aktiengesellschaft | Method of testing assemblies |
| US6845333B2 (en) * | 2002-04-17 | 2005-01-18 | Schweitzer Engineering Laboratories, Inc. | Protective relay with synchronized phasor measurement capability for use in electric power systems |
| CN1472858A (en) * | 2003-07-09 | 2004-02-04 | 北京四方继保自动化有限公司 | Circuit breakdown and oscillation identifying method based on resistance change rule |
| CN1595750A (en) * | 2004-07-07 | 2005-03-16 | 江苏省电力公司苏州供电公司 | 220 thousand volt high-voltage T-connection line three-side longitudinal protection device |
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| CN1885662A (en) | 2006-12-27 |
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Granted publication date: 20080604 Termination date: 20110615 |