CN106160226A - A kind of method of precision when improving intelligent substation PTP pair - Google Patents
A kind of method of precision when improving intelligent substation PTP pair Download PDFInfo
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- CN106160226A CN106160226A CN201610607565.5A CN201610607565A CN106160226A CN 106160226 A CN106160226 A CN 106160226A CN 201610607565 A CN201610607565 A CN 201610607565A CN 106160226 A CN106160226 A CN 106160226A
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 230000011218 segmentation Effects 0.000 claims abstract description 15
- 230000004048 modification Effects 0.000 claims abstract description 6
- 238000012986 modification Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims description 29
- 238000004891 communication Methods 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 108700009949 PTP protocol Proteins 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 230000002547 anomalous effect Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000015556 catabolic process Effects 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H02J13/0006—
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- H02J13/0062—
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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
Abstract
The invention discloses a kind of method of precision when improving intelligent substation PTP pair, described method includes: switch is configured to the P2P pattern of IEEE1588 agreement；Select network cut-point；The switch property of modification cut-point both sides；IV, will segmentation after network be respectively connected to clock source；The present invention provides a kind of 1588 dividing methods, a string switch is made to be divided into multistage, the attribute cascading port at the switch of modification segmentation portion, limit the forwarding of clock message, then in each section of network of segmentation, add clock source, the cascaded switches quantity of network of making often to throw the net reduces, and then chain-circuit time delay and shake are substantially reduced, reliability when significantly increasing network pair and precision.
Description
Technical field
The present invention relates to intelligent substation clock field of synchronization, when in particular to one improves intelligent substation PTP pair
The method of precision.
Background technology
Transformer station, changes the place of voltage.Electric energy in order to power plant is issued is transported to place farther out, it is necessary to
Voltage raises, and becomes high-tension electricity, on demand voltage is reduced near user again, and the work of this buck/boost comes by transformer station
Complete.The capital equipment of transformer station is switch and transformer.Different by scale, little is referred to as electric substation.Transformer station is more than
Electric substation.Electric substation: be usually the step-down substation at below 110KV for the electric pressure；Transformer station: include various electric pressure
" boosting, step-down " transformer station.
Transformer station is voltage of transformation in power system, acceptance and distribution electric energy, the flow direction of control electric power and adjustment voltage
Electric power facility, the grid contact of each step voltage is got up by it by its transformer.The information by IEC61850 for the intelligent substation
Automated system is divided into station level, wall and process layer by layered mode, to realize entirely stand information digitalization and communications platform
Networking.Thus communication network is divided into station dead level network and process-level network.With intelligent substation and secondary device network
The growth requirement changed, network Time synchronization technique has widely demand.
Time reference unified in intelligent substation is relay protection and the safe and reliable work of other automation equipments
Basis, is also the foundation of Correct Analysis electric network fault and cause of accident.IEEE1588 agreement is for distributed network observing and controlling system
System propose accurate clock synchronization protocol, if there being hardware to assist, pair when precision just can reach submicrosecond rank.Process is laminated
And the requirement of precision is delicate level during the equipment pair such as unit, intelligent terminal.Timestamp mode time delay played by the hardware that PTP protocol proposes
Shake is general within several nanoseconds, beats timestamp significantly eliminate the delays such as protocol stack separating out the nearest place of incoming interface
Impact.Therefore, mode when transformer station process layer should use IEEE1588 pair of hardware supported.
IEEE1588 agreement uses the master-slave mode pattern of layering to carry out time synchronized, main definitions four kinds multicast
Information type: 1. synchronizing information, is called for short Sync；2. the information after Sync, is called for short Follow_Up；3. latency request information, letter
Claim Delay_Req；4. ask response message, be called for short Delay_Resp.Concrete synchronizing process is as follows: .1, main equipment are every one section
Time (this time can set, and is determined by main equipment) sends SYNC message to from equipment, and this message is with the anticipated transmission time.?
During transmission, main equipment records the real time T1 that SYNC message sends, and from equipment when receiving this bag, records accurately
Reception time T2.In order to improve precision, it should send in physical layer or close to the local detection of physical layer, record and mark or connect
Between the time receiving.2nd, main equipment is after sending SYNC message, follows message to sending one from equipment at once, this message contained previously with
The correct time stamp T1 that step message sends.3rd, from equipment to main equipment forward delay interval request message (Delay_Req message), send
The time interval of this message is set by from equipment.From the actual transmission time T3 of equipment record Delay_Req message, main equipment is remembered
The actual time of arrival T4 of record Delay_Req request message.4th, main equipment responds a Delay_Resp message to from equipment, should
Message is with the accurate arrival time T4 of request message.According to T1, T2, T3, T4, transmission delay and clock can be calculated from equipment
Error.
From synchronization principles above it can be seen that during link bidirectional transmission delay equal (such as point-to-point transmission),
IEEE1588 can obtain very high synchronization accuracy.But message is when switch transmits, owing to switch transmission message needs
, inevitably there is transmission delay jitter in storage and queuing up, and time delay with queueing message number, the varying in size of message
And change.Therefore precision degradation when general switch transmission IEEE1588 message can cause pair, it is necessary to use and support
The network switch of IEEE1588 carries out message transmissions.
The clock module of IEEE1588 switch mainly has boundary clock (BC), end-to-end transparent clock (E2ETC) and point
To a transparent clock (P2P TC) three kinds.Under P2P pattern, switch will filter all of latency request and response message, and master clock is only
The latency request message that the switch being joined directly together with it sends need to be processed, though a lot of situation of terminal quantity in a network
Under, precision, therefore intelligent substation many selections P2P pattern when P2P pattern also can well ensure pair.But, owing to intelligence becomes
In power plant process layer network, the hub-and-spoke configurations that use, produce multi-stage cascade sometimes, and clock message passes through to hand over by multicast mode
Change planes and forward downwards step by step, even if yet suffering from time delay under P2P pattern and shaking bigger problem, combining unit or intelligence
There is bigger fluctuation in the territory of revising that terminal receives in the follow_up message that switch forwards, it is possible to can trigger from clock
Pair when anomalous event.
To this end, in the urgent need to a kind of improve intelligent substation PTP pair when precision method, lower the time delay of link and tremble
Dynamic, precision during raising pair.
Content of the invention
In order to solve the above-mentioned deficiency in the presence of prior art, the present invention provides and a kind of improves intelligent substation PTP pair
The method of Shi Jingdu, described method includes:
I, the P2P pattern that switch is configured to IEEE1588 agreement；
II, selection network cut-point；
III, the switch property of modification cut-point both sides；
IV, will segmentation after network be respectively connected to clock source.
Preferably, the switch of the P2P pattern that described step I is configured to IEEE1588 agreement includes: switch filters institute
Some latency request and response message, the latency request message that master clock source is processed and its switch being joined directly together sends.
Preferably, the clock source of the switch of described P2P pattern with multicast form to from clock source send sync and
Follow up message.
Preferably, the selection of described step II network cut-point includes: the switch quantity according to cascade and Ge Tai exchange
The quantity of device that machine connects and data traffic, select according to the flow summation value at each Self-cascading of each section of switch after segmentation
Cut-point.
Preferably, the switch property of described step III cut-point both sides includes: switch receives upper level clock source
Sync message, after processing through cpu, except not in addition to cascade port forwards, normally forwards to other ports.
Preferably, the network after described step IV is split is respectively connected to clock source and includes: the network after segmentation is respectively connected to
One road clock source or respectively access two-way clock source standby each other.
Preferably, described clock source accesses each section of network middle position.
Preferably, described intelligent substation includes process layer devices, bay device, station level equipment, station level network
And process-level network；
Described station level equipment and bay device carry out information transmission, described bay device and process by Ethernet
Layer equipment is communicated by optical cable；
Described bay device bridges described station level network and described process-level network.
Preferably, described process layer devices includes: smart machine, combining unit and intelligent terminal, completes transformer station's electric energy
Distribution, change, transmission and measurement thereof, control, protection, metering and status monitoring function；
Described bay device includes: protective relaying device, measure and control device and failure wave-recording secondary device, it is achieved use one
The data at individual interval and the function acting on this interval primary equipment；
Described station level equipment includes: automated system, territory control system of standing, communication system and pair when system, it is achieved face
The measurement of Xiang Quanzhan or primary equipment and control function, data acquisition and supervision control, operation locking and synchronized phasor
Collection, generated energy acquisition and protection information management function.
Preferably, described measure and control device includes main fransformer oil chromatogram monitoring module, arrester state detection module
And power-supply system；
Described power-supply system includes AC power supply system, DC power system, ups power system, the power supply system for communications, inverse
Variable power source system and communications monitor system.
Compared with immediate prior art, the present invention has a following excellent beneficial effect:
1st, in intelligent substation, a fairly large number of network of switch concatenation, chain can be significantly reduced by this invention
Road time delay and shake, precision during raising pair.
2nd, the present invention does not needs physical segmentation network, will not change network topology structure, thus will not be to other business yet
Communication impacts.
3rd, having only to expanding clock source and precision when configuration switch just can improve pair, engineering construction is relatively simple.
Brief description
The method schematic diagram of precision when Fig. 1 is raising intelligent substation PTP pair of the present invention；
Fig. 2 is the intelligent substation structural representation of the present invention.
Detailed description of the invention
In order to be more fully understood that the present invention, below in conjunction with Figure of description and example, present disclosure is done further
Explanation.
The present invention provides a kind of method of precision when improving intelligent substation PTP pair, and described method comprises the steps:
1st, the clock module of 1588 switches of process layer is configured to P2P pattern.
As in figure 2 it is shown, intelligent substation is divided into station level equipment, bay device, process layer devices, control of standing from structure
Layer network and process-level network, be functionally divided into process layer and station level:
Described station level equipment and wall carry out information transmission by Ethernet, and described bay device and process layer set
Standby communicated by optical cable；
Described bay device bridges described station level network and described process-level network.
Process layer devices includes: intelligent operation box, combining unit and the intelligent terminal that primary equipment and intelligent assembly are constituted；
Primary equipment includes: electronic mutual inductor and switchgear etc..
Bay device includes: the secondary devices such as protective relaying device, measure and control device, metering device and failure wave-recording；
Station level equipment includes: automated system, territory control system of standing, communication system and pair when system.
Described measure and control device includes main fransformer oil chromatogram monitoring module, arrester state detection module and power supply system
System；
Power-supply system includes AC power supply system, DC power system, ups power system, the power supply system for communications, inversion electricity
Origin system and communications monitor system
Station level equipment is by telemechanical communicator, Network records analysis, territory control system of standing and substation supervision system, clothes
The information integral platform that the equipment such as business device are constituted, it is achieved to the monitoring of intelligent substation panoramic view data, process and comprehensive analysis
And the function such as remote communication；
Realized and process layer devices, substation level equipment and various controller and biography by bay device communication bus
Data communication between sensor, and utilize the intelligence secondary devices such as supporting measure and control device, protective relaying device to process layer
The primary equipments such as electronic mutual inductor, breaker, transformer are monitored and signal sampling, by the analysis of sampled signal and
Judge and perform corresponding operation；
By using advanced electronic installation and intelligent assembly to the transformer in process layer devices, voltage/current mutual inductance
The replacement of the primary equipments such as device, breaker and disconnecting switch and transformation, it is achieved that the intellectuality of process layer devices.
The present invention is when process-level network uses IEEE1588 agreement pair, and the clock module by IEEE1588 switch is joined
Being set to P2P pattern, under P2P pattern, switch will filter all of latency request and response message, and master clock only need to be processed and it
The latency request message that the switch being joined directly together sends, even if terminal quantity is a lot of in a network in the case that, P2P pattern is also
Precision when can well ensure pair；
Clock source sends sync and follow_up message to from clock source with multicast form, and in network, all switches are received
Processing mode after sync and follow_up message is that each port on switch forwards.
2nd, select network cut-point, two sections will be divided in the switch logic of a string cascade so that sync message and
Follow_up message is isolated.Can simply separate from centre according to the quantity of cascade, the switch quantity of two sections is big
Generally identical, the quantity of the device simultaneously connecting according to each switch and data traffic size, split position is entered line displacement.Combine
Close the quantity considering the quantity of switch concatenation and each switch attachment means, there is more to evaluate the flow etc. of service message because of
Element.Make the flow summation at each Self-cascading of two sections of switches roughly the same.
3rd, by two switch property modifications of segmentation portion, cascaded switches receives upper level clock source under normal circumstances
Sync and follow_up sync message, after processing through cpu, forwards to all of the port, and after splitting, in the friendship of two segmentation portion
To change on changing planes so that the switch of cpu segmentation portion no longer forwards to cascade port, but still normal to other ports
Forward.
4th, two sections of networks after splitting are respectively connected to a road clock source, or each access two-way clock source, and a road is primary,
Another road is standby, accesses each section of network middle position so that terminal in logic will not be too remote from clock device distance clock source,
The negligible amounts of the switch being i.e. spaced.
5, network can be divided into more multisegment for when cascading more, simply in segmentation portion configuration exchange
Machine, each network segment is respectively connected to clock source simultaneously, and cut-in method is with step 4.
These are only embodiments of the invention, be not limited to the present invention, all in the spirit and principles in the present invention
Within, any modification, equivalent substitution and improvement etc. done, be all contained in applying for the scope of the presently claimed invention that awaits the reply it
In.
Claims (10)
1. the method for precision when improving intelligent substation PTP pair, it is characterised in that described method includes:
I, the P2P pattern that switch is configured to IEEE1588 agreement；
II, selection network cut-point；
III, the switch property of modification cut-point both sides；
IV, will segmentation after network be respectively connected to clock source.
2. the method for precision when improving intelligent substation PTP pair as claimed in claim 1, it is characterised in that described step I
Switch filters all of latency request and response message, the time delay that master clock source is processed and its switch being joined directly together sends
Request message.
3. the method for precision when improving intelligent substation PTP pair as claimed in claim 2, it is characterised in that described P2P pattern
Switch master clock source with multicast form to from clock source send sync and follow up message.
4. the method for precision when improving intelligent substation PTP pair as claimed in claim 1, it is characterised in that described step II
The selection of network cut-point includes: according to the switch quantity cascading, the quantity of the device of each switch connection and data stream
After amount, and segmentation, the flow summation value at each Self-cascading of each section of switch selects cut-point.
5. the method for precision when improving intelligent substation PTP pair as claimed in claim 1, it is characterised in that described step III
The switch property of cut-point both sides includes: switch receives the sync message of upper level clock source, after processing through cpu, except not
Outside cascade port forwards, normally forward to other ports.
6. the method for precision when improving intelligent substation PTP pair as claimed in claim 1, it is characterised in that described step IV
Network after segmentation is respectively connected to clock source and includes: the network after segmentation is respectively connected to a road clock source or each access two-way is mutual
For standby clock source.
7. the method for precision when improving intelligent substation PTP pair as claimed in claim 6, it is characterised in that described clock source
Access each section of network middle position.
8. the method for precision when improving intelligent substation PTP pair as claimed in claim 1, it is characterised in that described intelligence becomes
Power station includes process layer devices, bay device, station level equipment, station level network and process-level network；
Described station level equipment and bay device carry out information transmission by Ethernet, and described bay device and process layer set
Standby communicated by optical cable；
Described bay device bridges described station level network and described process-level network.
9. the method for precision when improving intelligent substation PTP pair as claimed in claim 8, it is characterised in that described process layer
Equipment includes: smart machine, combining unit and intelligent terminal；
Described bay device includes: protective relaying device, measure and control device and failure wave-recording secondary device；
Described station level equipment includes: automated system, territory control system of standing, communication system and pair when system.
10. the method for precision when improving intelligent substation PTP pair as claimed in claim 9, it is characterised in that described observing and controlling fills
Put and include main fransformer oil chromatogram monitoring module, arrester state detection module and power-supply system；
Described power-supply system includes AC power supply system, DC power system, ups power system, the power supply system for communications, inversion electricity
Origin system and communications monitor system.
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| CN201610607565.5A CN106160226B (en) | 2016-07-28 | 2016-07-28 | Method for improving PTP time synchronization precision of intelligent substation |
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