CN102570617A - Method for realizing wide area protection system among multiple substations - Google Patents
Method for realizing wide area protection system among multiple substations Download PDFInfo
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- CN102570617A CN102570617A CN2012100357486A CN201210035748A CN102570617A CN 102570617 A CN102570617 A CN 102570617A CN 2012100357486 A CN2012100357486 A CN 2012100357486A CN 201210035748 A CN201210035748 A CN 201210035748A CN 102570617 A CN102570617 A CN 102570617A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000004891 communication Methods 0.000 claims abstract description 23
- 230000001360 synchronised effect Effects 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 11
- 230000003993 interaction Effects 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 7
- 238000012952 Resampling Methods 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04S10/16—Electric power substations
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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
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
Abstract
The invention relates to a method for realizing a wide area protection system among multiple substations, comprising: using an SDH (Synchronous Digital Hierarchy) looped network or a dedicated optical fiber as a communication medium to realize synchronous sampling of electrical capacity in each substation by using an IEEE (Institute of Electrical and Electronic Engineers) 1588 synchronized method; using an IEC (International Electrotechnical Commission) 61850 communication protocol to realize data interaction between a master station and each substation; realizing traditional back-up protection and failure protection with differential protection of cross components on the basis of using differential protection to realize main protection and busbar differential protection of a traditional line; realizing the physical connection between each substation and the master station in a protected area by using SDH network or the dedicated optical fiber, wherein the SDH network bandwidth keeps certain margin based on the data flow flowing through the network. The invention provides a method for realizing the wide area protection system among multiple substations, which realizes main protection and back-up protection of busbars and lines with the same voltage level of multiple substations based on the existing communication technique, network technique and digitization substation technique.
Description
Technical field
The invention belongs to relaying protection field in the electric power system, particularly the implementation method of electrical power system wide-area protection.
Background technology
Wide area protection is to depend on electric power system multiple spot information, to fault carry out fast, reliable, accurately excision, analysis of failure excision simultaneously is to the influence of system safety stable operation, and takes the novel protected of corresponding control measure.In recent years, experts and scholars have done a large amount of research and practice to wide area protection both at home and abroad, have proposed a large amount of constructive systems implementation method and protection strategy.Yet owing to be limited by computer and mechanics of communication, the system information that these researchs or practice are adopted generally all is non-real-time sampling information, thereby can only consider from the angle of backup protection.Along with progressively popularization, the develop rapidly of the communication technology and the applying of power optical fiber communication network of digital transformer substation, present stage has possessed builds the material conditions based on the wide area protection of real-time sampling information.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of method that between a plurality of transformer stations, realizes the wide area protection system is provided.This system is with SDH looped network (Synchronous Digital Hierarchy; Synchronous digital system network; With the transmission of multiple connection, circuit and function of exchange combines together and transmit network by the integrated information of united net management system operation) or special optic fibre as medium of communication; Adopt IEEE 1588 simultaneous techniquess to realize the synchronized sampling of each transformer station's electric parameters, adopt IEC 61850 communication protocols to realize the data interaction between main website and each transformer station.This system is adopting differential protection to realize realizing functions such as traditional backup protection, failure protection with the differential protection of striding element on the basis of traditional circuit main protection and bus differential protection.This method can be widely used in the wide area protection system of different protection ranges.
The present invention realizes through following technical scheme: a kind of method that between a plurality of transformer stations, realizes the wide area protection system; This method with SDH looped network or special optic fibre as medium of communication; Adopt IEEE 1588 method for synchronous (the precision interval clock synchronous protocol standard of network measure and control system) to realize the synchronized sampling of each transformer station's electric parameters, adopt IEC 61850 communication protocols to realize the data interaction between main website and each transformer station.This system is adopting differential protection to realize realizing functions such as traditional backup protection, failure protection with the differential protection of striding element on the basis of traditional circuit main protection and bus differential protection.This method can be widely used in the wide area protection system of different protection ranges.The performing step of this method is characterized in that: further comprising the steps of:
(1). with the physical connection between each transformer station and the main website in SDH network or the special optic fibre realization protected area, the SDH network bandwidth keeps certain nargin according to the data traffic that flows through this network;
(2). adopt to support the switch of 1588 communications, realize in the transformer station, the network of each equipment is connected between transformer station and the main website;
(3). adopt IEEE 1588 method for synchronous, realize the synchronized sampling of electric parameters between each transformer station;
(4). adopt IEC 61850 communication protocols to send the electric parameters of each transformer station to main website;
(5). main website carries out preliminary treatment to the electric parameters of each transformer station, comprises packet parsing, data resampling etc.;
(6). main website is through the topological structure of each transformer station protected area; Automatically generate the differential combination that is applicable to main protection and backup protection; Wherein the differential combination of main protection is made up of the CT that directly links to each other through electric network element, and the differential combination of backup protection is by forming with CT that trans-regional interior electric network element directly links to each other;
(7). according to the differential combination of main protection and backup protection and the electric parameters of synchronous each transformer station afterwards; Protect action to judge; If satisfy operation condition, then the ICU to each transformer station of correspondence sends action command, and notes the fault waveform and the action behavior of fault moment whole system;
(8). the variety of event journal (SOE) in the register system running, and through the back-stage management program write down with reality.
Advantage of the present invention and beneficial effect are: the invention provides a kind of method that between a plurality of transformer stations, realizes wide area protection; This method exists with ... existing mechanics of communication, network technology and digital transformer substation technology; The bus to the same electric pressure of a plurality of transformer stations, the main protection and the backup protection of circuit have been realized; And real time data processing platform between a unified station is provided, for further expanding of function aspects provides the foundation.
Description of drawings
Fig. 1 realizes sketch map for the wide area protection system.
Embodiment
Through specific embodiment the present invention is made further detailed description below, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A kind of method that between a plurality of transformer stations, realizes the wide area protection system.This method as medium of communication, adopts IEEE 1588 simultaneous techniquess to realize the synchronized sampling of each transformer station's electric parameters with SDH looped network or special optic fibre, adopts IEC 61850 communication protocols to realize the data interaction between main website and each transformer station.This method is adopting differential protection to realize realizing functions such as traditional backup protection, failure protection with the differential protection of striding element on the basis of traditional circuit main protection and bus differential protection.This method can be widely used in the wide area protection system of different protection ranges.The performing step of this method, further comprising the steps of:
(1). with the physical connection between each transformer station and the main website in SDH network or the special optic fibre realization protected area, the SDH network bandwidth keeps certain nargin according to the data traffic that flows through this network; Be that bandwidth leaves surplus assurance data flow;
(2). adopt to support the switch of 1588 communications, realize in the transformer station, the network of each equipment is connected between transformer station and the main website;
(3). adopt IEEE 1588 method for synchronous, realize the synchronized sampling of electric parameters between each transformer station;
(4). adopt IEC 61850 communication protocols to send the electric parameters of each transformer station to main website;
(5). realize the preliminary treatment of electric parameters, comprise packet parsing, data resampling etc.
(6). through the topological structure of protected area, generate the differential combination that is applicable to main protection and backup protection automatically.
(7). according to differential combination with synchronously after electric parameters, protect action to judge, if satisfy operation condition, then the ICU to correspondence sends action command, and notes the fault waveform and the action behavior of fault moment whole system.
(8). the various SOE in the register system running, and through the back-stage management program write down with reality.
Described differential combination is meant on the basis of adopting differential protection to realize traditional circuit main protection and bus differential protection, realizes traditional backup protection with the differential protection of striding element.
Application content when the protection of differential combination can be referring to the applicant: adopt differential protection to realize the method for backup protection in the wide area protection, comprise and adopt the differential protection of striding element to realize traditional backup protection; Wide area protection mainly adopts the method by the circuit breaker configuration protection, when break down in the protected area, considers the action behavior of each circuit breaker one by one; In differential combination; Consider each circuit breaker one by one, except self; The expansion of protecting when dead band or malfunctioning fault take place is a reserve differential protection district of this circuit breaker and current transformer, all the differential combinations when obtaining all circuit breakers and current transformer and protecting in support; The signal that each sampling interval provides the differential protection combination of the bus differential district that obtains and circuit differential area carries out action behavior and judges; If satisfy the operation condition of differential protection, this circuit breaker of tripping and current transformer place circuit breaker are striden the element excision system failure.
Described differential combination is the combination that in differential protection, is used for the CT of difference flowmeter calculation.Differential combination promptly is made up of two groups of CT at circuit two ends in for example traditional line differential protection, and differential combination is made up of all CT that are connected in this bus in the single busbar connection bus differential protecting.
Wherein IEEE 1588 method for synchronous are that a master and slave clock is arranged in electric power system; Master clock is through periodically sending a packets of information that comprises temporal information in network; After receiving from clock; Carry out clock skew and measure and delay measurements, utilize side-play amount to revise local clock, utilize retardation to solve the influence of line delay amount from clock.
And IEC 61850 is to the requirement of the automation of transformation substations and stipulations or agreement that a kind of general communication mode that proposes is realized in the current power system.IEC61850 has proposed a kind of public communication standard, and equipment is standardized.
Claims (1)
1. method that between a plurality of transformer stations, realizes the wide area protection system; It is characterized in that: with SDH looped network or special optic fibre as medium of communication; Adopt IEEE 1588 method for synchronous to realize the synchronized sampling of each transformer station's electric parameters; Adopt IEC 61850 communication protocols to realize the data interaction between main website and each transformer station, and adopting differential protection to realize realizing traditional backup protection, failure protection with the differential protection of striding element on the basis of traditional circuit main protection and bus differential protection; May further comprise the steps:
(1) with the physical connection between each transformer station and the main website in SDH network or the special optic fibre realization protected area, the SDH network bandwidth keeps certain nargin according to the data traffic that flows through this network;
(2) adopt to support the switch of 1588 communication protocols, realize in the transformer station, the network of each equipment is connected between transformer station and the main website;
(3) adopt IEEE 1588 method for synchronous, realize the synchronized sampling of electric parameters between each transformer station;
(4) adopt IEC 61850 communication protocols to send the electric parameters of each transformer station to main website;
(5) main website carries out preliminary treatment to the electric parameters of each transformer station, comprises packet parsing, data resampling etc.;
(6) main website is through the topological structure of each transformer station protected area; Automatically generate the differential combination that is applicable to main protection and backup protection; Wherein the differential combination of main protection is made up of the CT that directly links to each other through electric network element, and the differential combination of backup protection is by forming with CT that trans-regional interior electric network element directly links to each other;
(7) according to the differential combination of main protection and backup protection and the electric parameters of synchronous each transformer station afterwards; Protect action to judge; If satisfy operation condition, then the ICU to each transformer station of correspondence sends action command, and notes the fault waveform and the action behavior of fault moment whole system;
(8) the variety of event journal (SOE) in the register system running, and through the back-stage management program write down with reality.
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| CN2012100357486A CN102570617B (en) | 2012-02-17 | 2012-02-17 | Method for realizing wide area protection system among multiple substations |
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| CN2012100357486A CN102570617B (en) | 2012-02-17 | 2012-02-17 | Method for realizing wide area protection system among multiple substations |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532237A (en) * | 2013-10-21 | 2014-01-22 | 中国南方电网有限责任公司 | Wide-area protection control system based on IEEE1588 network timing protocol |
| CN104064018A (en) * | 2014-06-26 | 2014-09-24 | 广东互维科技有限公司 | Transmission method for environmental-quantity data |
| CN104078946A (en) * | 2013-10-30 | 2014-10-01 | 中国南方电网有限责任公司 | Wide-area distance protecting method for transformer substations |
| CN104202214A (en) * | 2014-09-10 | 2014-12-10 | 广西电网公司电力科学研究院 | Distribution automation wireless communication terminal and distribution master station communication channel delay test method |
| CN104505935A (en) * | 2014-12-01 | 2015-04-08 | 华中科技大学 | Routing method for substation system based on protection intelligent center |
| CN104901758A (en) * | 2015-04-13 | 2015-09-09 | 北京四方继保自动化股份有限公司 | Double-plane clock synchronization method applied to wide-area protection control system |
| WO2015180529A1 (en) * | 2014-05-27 | 2015-12-03 | 国家电网公司 | Microgrid adaptive overcurrent protection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409442A (en) * | 2008-11-25 | 2009-04-15 | 中国南方电网有限责任公司 | Rapid line backup protection method with reliable selection based on wide area measuring system |
| CN101478146A (en) * | 2008-10-13 | 2009-07-08 | 清华大学 | Digital transforming plant protecting controlling method and multifunctional protection controller |
-
2012
- 2012-02-17 CN CN2012100357486A patent/CN102570617B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478146A (en) * | 2008-10-13 | 2009-07-08 | 清华大学 | Digital transforming plant protecting controlling method and multifunctional protection controller |
| CN101409442A (en) * | 2008-11-25 | 2009-04-15 | 中国南方电网有限责任公司 | Rapid line backup protection method with reliable selection based on wide area measuring system |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532237A (en) * | 2013-10-21 | 2014-01-22 | 中国南方电网有限责任公司 | Wide-area protection control system based on IEEE1588 network timing protocol |
| CN104078946A (en) * | 2013-10-30 | 2014-10-01 | 中国南方电网有限责任公司 | Wide-area distance protecting method for transformer substations |
| CN104078946B (en) * | 2013-10-30 | 2015-08-05 | 中国南方电网有限责任公司 | A kind of wide area distance protecting method towards transformer station |
| WO2015180529A1 (en) * | 2014-05-27 | 2015-12-03 | 国家电网公司 | Microgrid adaptive overcurrent protection method |
| CN104064018A (en) * | 2014-06-26 | 2014-09-24 | 广东互维科技有限公司 | Transmission method for environmental-quantity data |
| CN104202214A (en) * | 2014-09-10 | 2014-12-10 | 广西电网公司电力科学研究院 | Distribution automation wireless communication terminal and distribution master station communication channel delay test method |
| CN104505935A (en) * | 2014-12-01 | 2015-04-08 | 华中科技大学 | Routing method for substation system based on protection intelligent center |
| CN104901758A (en) * | 2015-04-13 | 2015-09-09 | 北京四方继保自动化股份有限公司 | Double-plane clock synchronization method applied to wide-area protection control system |
| CN104901758B (en) * | 2015-04-13 | 2018-07-27 | 北京四方继保自动化股份有限公司 | A kind of biplane clock synchronizing method applied to wide area protection control system |
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| CN102570617B (en) | 2013-10-30 |
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Owner name: JIANGSU WISCOM TECHNOLOGY CO., LTD. STATE GRID COR Free format text: FORMER OWNER: JIANGSU WISCOM TECHNOLOGY CO., LTD. Effective date: 20130105 |
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Effective date of registration: 20130105 Address after: 150090 No. 301, Han River Road, Nangang District, Heilongjiang, Harbin Applicant after: Heilongjiang Power Co., Ltd. Applicant after: Jinzhi Science and Technology Co., Ltd., Jiangsu Applicant after: State Grid Corporation of China Address before: 150090 No. 301, Han River Road, Nangang District, Heilongjiang, Harbin Applicant before: Heilongjiang Power Co., Ltd. Applicant before: Jinzhi Science and Technology Co., Ltd., Jiangsu |
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Address after: 150090 No. 301, Han River Road, Nangang District, Heilongjiang, Harbin Patentee after: State Grid Heilongjiang Electric Power Co., Ltd. Patentee after: Jinzhi Science and Technology Co., Ltd., Jiangsu Patentee after: State Grid Corporation of China Address before: 150090 No. 301, Han River Road, Nangang District, Heilongjiang, Harbin Patentee before: Heilongjiang Power Co., Ltd. Patentee before: Jinzhi Science and Technology Co., Ltd., Jiangsu Patentee before: State Grid Corporation of China |
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Inventor after: Bo Jinsong Inventor after: Zhou Yingqiu Inventor after: Xiao Rongguo Inventor after: Long Zhu Inventor after: Zeng Bingyuan Inventor before: Bo Jinsong Inventor before: Zhou Yingqiu Inventor before: Xiao Rongguo Inventor before: Zeng Bingyuan |
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