CN103715766A - Ring network distributed bus protection synchronization method - Google Patents
Ring network distributed bus protection synchronization method Download PDFInfo
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- CN103715766A CN103715766A CN201310700082.6A CN201310700082A CN103715766A CN 103715766 A CN103715766 A CN 103715766A CN 201310700082 A CN201310700082 A CN 201310700082A CN 103715766 A CN103715766 A CN 103715766A
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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
- Y04S10/20—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 discloses a ring network distributed bus protection synchronization method. The ring network distributed bus protection synchronization method includes the steps of sampling synchronization, constant value pressing plate synchronization and time synchronization. According to the sampling synchronization, fixed delay and measurement delay are adopted; the delay correction domain of sampling messages is corrected real time; and after obtaining sampling messages of all interval units, a ring network bus protection unit performs software interpolation synchronization through analyzing sampling delay in the delay correction domain. According to the constant value pressing plate synchronization, a source-end synchronous method is adopted; and a constant value pressing plate can be synchronized at any intervals of ring network bus protection. According to the time synchronization, a time synchronization method based on minimum addresses is adopted; and each interval of the ring network bus protection can still have very high timing precision under the situation in which an external time source is lost at an extreme end. The ring network distributed bus protection synchronization method of the invention is advantageous in easiness in implementation, no need for external synchronization sources and high synchronization precision.
Description
Technical field
The present invention relates to a kind of relay protection of power system protective device new method that is applied to.Be particularly related to the distributed bus protection simultaneous techniques of looped network, can solve the requirement of looped network bus protection to simultaneous techniques.
Background technology
Along with the development of Intelligent transformer station, distributed bus protection, owing to having towards interval, adapts to and transfers on the spot, simplifies the features such as secondary circuit wiring, becomes the best solution that adapts to intelligent substation engineering application demand.Distributed bus protection can be divided into and have two kinds of main website formula and dereliction standing postures according to system architecture: configuration main website and substation; substation Jin Xiang main website interaction data; between substation, without the distributed bus protection of Wei You main website formula of data interaction, this is also the conventional mode of current domestic intelligent station.The distributed bus protection of another kind of dereliction is configuration space unit (substation) only, between unit, interval, by looped network network, is connected in series successively interaction data, by a whole set of bus protection of each interval cell formation.
Both at home and abroad to dereliction formula bus protection, research mainly concentrates on the communication network of compartment, and document comprises based on token ring optical fiber dual ring communication network and the loop network topology structure based on switch technology as seen.Be limited to communication technology level, cannot form matured product.
Have main distributed bus protection to adopt at present point-to-point and networking mode in application for Practical Project, its in the following ways generally synchronously: point-to-point sampling utilizes software interpolation synchronous, networking need outside to time to carry out sequence number synchronous in source.For dereliction formula looped network bus protection, simultaneous techniques will be a key technology, and synchronous method and synchronization accuracy will affect bus protection huge.
Summary of the invention
Object of the present invention provides a kind of looped network distributed bus protection synchronous method, solves the deficiencies in the prior art, is successfully applied in looped network protection equipment for busbar.
For reaching above object, the present invention is achieved through the following technical solutions.
The distributed bus protection synchronous method of looped network, is characterized in that: comprise sample-synchronous, definite value pressing plate synchronously and time synchronized:
Described sample-synchronous adopts the sampling synchronization method in looped network time delay correction territory, specifically comprises the following steps:
1) when the sampling value message at certain interval passes through this interval, the delay time of this interval of looped network bus protection and previous adjacent spaces and the time delay correction territory that the residence time sum of sampling value message at this interval writes the message at this interval in real time will be measured in real time;
2) sampling value message is every revises time delay correction territory through 1 interval, until sampled data transfers all intervals;
3) other spaced sampling value message of this interval acquiring, after the specified time delay of merge cells and time delay correction territory time delay in analytic message, utilizes the method for software interpolation to carry out sample-synchronous;
Described definite value pressing plate synchronously adopts the synchronous method of source, in looped network bus protection arbitrary interval, carries out synchronously;
Described time synchronized adopts the preferential synchronous method of lowest address, by special management message receive in looped network two to time source to time message, when two to time source all adopt effectively time address lower to time source messages; When detect only have 1 to time source adopt when effective this to time source; When two to time source while all losing efficacy, adopt inner to time mechanism.
The invention has the beneficial effects as follows:
(1) sample-synchronous implementation method is simple, and synchronization accuracy is high, does not rely on external synchronization source.
(2) definite value pressing plate synchronously can be realized in arbitrary interval, and synchronizing speed is fast, has very high reliability.
(3) adopt the preferential clock synchronizing method of lowest address can fine solution looped network in each interval to time problem, have to time precision high, redundancy high.
The present invention has well solved synchronous this technical barrier of each compartment of looped network bus protection.
Accompanying drawing explanation
The distributed bus protection of Fig. 1 looped network and synchronous schematic diagram;
The distributed bus protection sample-synchronous of Fig. 2 looped network schematic diagram;
The synchronous schematic diagram of the distributed bus protection definite value of Fig. 3 looped network pressing plate;
The distributed bus protection time synchronized of Fig. 4 looped network schematic diagram.
Embodiment
Below in conjunction with block diagram, the present invention is done to concrete introduction.
Fig. 1 is the distributed bus protection of looped network and synchronous schematic diagram.Distributed bus protection, by reciprocity interval cell formation, adopts bidirectional loop network to connect, bandwidth 1000M between unit, interval as shown in the figure.After the data acquisition at each Jiang Zhe interval, unit, interval, by looped network, be shared to other unit, all intervals, by each interval complete independently bus protection function.After each unit action, only jump this interval switch.
Due to each unit, interval equity, synchronous method of the present invention comprises sample-synchronous, the synchronous and time synchronized of definite value pressing plate.Sample-synchronous technique guarantee sample-synchronous precision, definite value pressing plate synchronously guarantees the consistency at each interval, time synchronized maintains the clock accuracy at each interval.
Fig. 2 is the distributed bus protection sample-synchronous of looped network schematic diagram.Looped network bus protection is by six interval cell formations as shown in the figure, each interval with reference to IEEE1588 to time mechanism, based on adopting balanced method to calculate the link transmission time delay T1 between adjacent node under the consistent prerequisite of link transmit-receive loop time delay, T2, T3, T4, T5, T6(wherein T1 is the transmission delay between interval 1 to interval 2, T2 is the transmission delay between interval 2 to interval 3, T3 is the transmission delay between interval 3 to interval 4, T4 is the transmission delay between interval 4 to interval 5, T5 is the transmission delay between interval 5 to interval 6, T6 is the transmission delay between interval 6 to interval 1).The message residence time t1 that each unit, interval forwards from receiving Packet by Packet, t2, t3, t4, t5, t6(t1 be sampling value message at interval 2 residence time, t2 be sampling value message at interval 3 residence time, t3 be sampling value message at interval 4 residence time, t4 be sampling value message at interval 5 residence time, t5 be sampling value message at interval 6 residence time, t6 be sampling value message at interval 1 residence time).
The sampling value message transmitting in looped network is safeguarded a time delay correction territory, when this interval of sampling value message process, by above-mentioned two times, revises in real time this time delay correction territory.For the total transmission delay of recorded message.
The sampled data one-way transmission in looped network that unit, interval 1 receives of take is example, and in the time delay correction territory that each interval receives, propagation delay time is as follows:
Interval 1:0
Interval 2:t6+T1
Interval 3:t6+T1+t1+T2
Interval 4:t6+T1+t1+T2+t2+T3
Interval 5:t6+T1+t1+T2+t2+T3+t3+T4
Interval 6:t6+T1+t1+T2+t2+T3+t3+T4+t4+T5
In conjunction with the specified time delay in each unit (Td, digital sample is taken from the specified time delay of merge cells, traditional sampling constant time lag), with interval 6, the total time delay of each interval sampling link is as follows:
Interval 6 sampling total time delay: Td6
The interval 5 sampling total time delays in arrival interval 6: Td5+ t4+T5
The interval 4 sampling total time delays in arrival interval 6: Td4+ t4+T5+t3+T4
The interval 3 sampling total time delays in arrival interval 6: Td3+ t4+T5+t3+T4+t2+T3
The interval 2 sampling total time delays in arrival interval 6: Td2+ t4+T5+t3+T4+t2+T3+t1+T2
The interval 1 sampling total time delay in arrival interval 6: Td1+ t4+T5+t3+T4+t2+T3+t1+T2+t6+T1
Interval 6 obtains the sampling time delay at above-mentioned each interval, adopts the method for software interpolation to carry out sample-synchronous.
If consider looped network access unit, 36 intervals at most, the transmission rate based on 1000M, from interval, 1 to interval, 36 total link delays are less than 160us to sampling value message, consider each interval Ethernet shake and each interval crystal oscillator deviation, and total shake time is less than 1 us.According to 36 intervals, maximum transmitted time delay is less than 165 us.Can meet sampling value message transmission delay and be less than 3ms, the transmission delay shake of message is less than 10us requirement.When being configured to bidirectional loop network, above-mentioned link delay will reduce greatly.
Fig. 3 is the synchronous schematic diagram of the distributed bus protection definite value of looped network pressing plate.At interval, 1 carry out definite value pressing plate when synchronous as shown in the figure, interval 16 sends definite value sync messages as source to 1 ~ interval, interval, after each interval feedback, interval 1 is sent to each interval with file mode by definite value pressing plate, and each interval writes definite value buffer memory after receiving file.After above-mentioned steps finishes, interval 1 issues definite value by rapid message and upgrades message, the unified definite value of upgrading in each interval.In like manner interval 4 also can be used as source and carries out aforesaid operations.
Fig. 4 is the distributed bus protection time synchronized of looped network schematic diagram.As shown in the figure optional two arranged spaced man-machine interaction modules access GPS/ Big Dipper to time source, under normal circumstances, unit, two intervals by looped network, to other intervals, send to time message.Other intervals receive to time message after, according to the preferential method of lowest address carry out to time message process, address, interval lower to time message prior, adopting as shown in the figure 1(address, interval is 1) to time message.When interval 1 lose to time source after, each interval automatically switch to interval 2 to time message.When interval 1, interval 2 loses after clock source simultaneously, and clock chip itself that automatically select interval 1 to safeguard carries out looped network time service.
Below with preferred embodiment, announced the present invention, so it is not intended to limiting the invention, all take to be equal to replace or technical scheme that the scheme of equivalent transformation obtains, all drop in protection scope of the present invention.
Claims (2)
1. the distributed bus protection synchronous method of looped network, is characterized in that: comprise sample-synchronous, definite value pressing plate is synchronous and time synchronized:
Described sample-synchronous adopts the sampling synchronization method in looped network time delay correction territory, specifically comprises the following steps:
1) when the sampling value message at certain interval passes through this interval, the delay time of this interval of looped network bus protection and previous adjacent spaces and the time delay correction territory that the residence time sum of sampling value message at this interval writes the message at this interval in real time will be measured in real time;
2) sampling value message is every revises time delay correction territory through 1 interval, until sampled data transfers all intervals;
3) other spaced sampling value message of this interval acquiring, after the specified time delay of merge cells and time delay correction territory time delay in analytic message, utilizes the method for software interpolation to carry out sample-synchronous;
Described definite value pressing plate synchronously adopts the synchronous method of source, in looped network bus protection arbitrary interval, carries out synchronously;
Described time synchronized adopts the preferential synchronous method of lowest address, by special management message receive in looped network two to time source to time message, when two to time source all adopt effectively time address lower to time source messages; When detect only have 1 to time source adopt when effective this to time source; When two to time source while all losing efficacy, adopt inner to time mechanism.
2. the distributed bus protection synchronous method of looped network according to claim 1, it is characterized in that: when definite value pressing plate is synchronous, interval 1 sends definite value sync message as source to other interval, after other each interval feedback, interval 1 is sent to other each interval with file mode by definite value pressing plate, after other each interval receives file, writes definite value buffer memory; Interval 1 issues definite value by rapid message and upgrades message, the unified definite value of upgrading in other each interval.
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Cited By (9)
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| CN104219016A (en) * | 2014-09-10 | 2014-12-17 | 广西电网公司电力科学研究院 | Method for selecting clock synchronizing moments of power distribution master stations and power distribution terminals |
| CN105449845A (en) * | 2014-05-30 | 2016-03-30 | 华为技术有限公司 | Message processing method, device and system |
| CN105977925A (en) * | 2016-06-20 | 2016-09-28 | 南京国电南自电网自动化有限公司 | Bus protection implementation method capable of adapting to host-including mode and host-free mode |
| CN106506260A (en) * | 2016-10-17 | 2017-03-15 | 国电南瑞科技股份有限公司 | A kind of message time delay measurement and modification method based on HSR bidirectional loop networks |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449845A (en) * | 2014-05-30 | 2016-03-30 | 华为技术有限公司 | Message processing method, device and system |
| CN105449845B (en) * | 2014-05-30 | 2017-12-12 | 华为技术有限公司 | Processing method, device and the system of message |
| CN104219016B (en) * | 2014-09-10 | 2018-03-09 | 广西电网公司电力科学研究院 | The system of selection of distribution main website and distribution terminal clock synchronization point |
| CN104219016A (en) * | 2014-09-10 | 2014-12-17 | 广西电网公司电力科学研究院 | Method for selecting clock synchronizing moments of power distribution master stations and power distribution terminals |
| CN105977925A (en) * | 2016-06-20 | 2016-09-28 | 南京国电南自电网自动化有限公司 | Bus protection implementation method capable of adapting to host-including mode and host-free mode |
| CN106506260A (en) * | 2016-10-17 | 2017-03-15 | 国电南瑞科技股份有限公司 | A kind of message time delay measurement and modification method based on HSR bidirectional loop networks |
| WO2018072273A1 (en) * | 2016-10-17 | 2018-04-26 | 国电南瑞科技股份有限公司 | Message delay measurement and correction method based on bidirectional hsr ring network |
| CN110199502A (en) * | 2016-11-23 | 2019-09-03 | 德吉润股份有限公司 | Arrange loop network |
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| CN107508719A (en) * | 2017-02-15 | 2017-12-22 | 北京中航通用科技有限公司 | Measure the method, apparatus and network node of network delay |
| CN107508719B (en) * | 2017-02-15 | 2020-04-14 | 北京中航通用科技有限公司 | Method and device for measuring network time delay and network node |
| CN108565824A (en) * | 2018-04-26 | 2018-09-21 | 许继集团有限公司 | The data processing method of distributed protection device and distributed protection system |
| CN108565824B (en) * | 2018-04-26 | 2020-05-19 | 许继集团有限公司 | Data processing method of distributed protection device and distributed protection system |
| CN109088400A (en) * | 2018-08-07 | 2018-12-25 | 许继集团有限公司 | A kind of distribution protecting method and system |
| CN109600289A (en) * | 2018-12-06 | 2019-04-09 | 中国电力科学研究院有限公司 | Intelligent substation is in HSR looped network and data receiving-transmitting method and protection between looped network |
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