CN104683088B - Multi-reference synchronization method, device and system - Google Patents
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Abstract
The invention provides a multi-reference synchronization method, a device and a system. The multi-reference synchronization system comprises a plurality of reference time frequency clock nodes, wherein each reference time frequency clock node comprises a satellite signal processing device, an atomic clock, a local time frequency comparison device and a local time distribution device; the satellite signal processing device receives the satellite signals of a satellite system, generates local time information Ts and sends the local time information Ts to the local time frequency comparison device; the atomic clock provides frequency reference Fr for a geographical region where the reference time frequency clock node is located, and sends the Fr to the local time frequency comparison device at the same time, and the local time frequency comparison device obtains PTP (point-to-point) message signals from time distribution devices of a plurality of adjacent reference time frequency clock nodes, generates synchronous time reference Tr according to the Ts, the Fr and the time information Tp included by the plurality of PTP message signals, and sends the Tr to the local time distribution device; the local time distribution device receives the Tr, and sends the PTP message signals including the synchronous time reference Tr to a plurality of adjacent reference time frequency clock nodes.
Description
Technical field
The present invention is with regard to electric power networks simultaneous techniquess, especially with regard to a kind of many reference synchronization method, apparatus and system.
Background technology
External digital synchronous network starting is early, research is abundant, fairly perfect through construction for many years.European Countries and U.S.
The synchronous net of state has defined synchronization entirely or theory is entirely synchronous, and such as, European countries are little, and synchronous network planning mould is also little, only has
Ground caesium clock a reference source, inapplicable GPS networking, one reference clock of the whole network, using master-slave synchronisation mode, no frequency under normal circumstances
Partially, that is, realize the whole network synchronous；Though the U.S. is multiple reference clock source, it uses GPS technology networking to combine synchronous net monitoring system
System, controls and improves the frequency departure between reference clock source so as to the long run frequency accuracy of reference clock source is better than ± 1E-
13, synchronous to reach the whole network.
Domestic electrical Frequency Synchronization net develops into today, in terms of networking, employ with save as synchronization zone, master-slave synchronisation side
The networking technology of method, three-level tree structure and mixed synchronization mode；So, the performance between each big synchronization zone is different, crosses over many
The time link of individual synchronization zone, the clockwork segmentation on link synchronizes, and the clock of each sub- synchronization zone is not traced back to
Unified reference clock source, once indivedual clockwork performance degradation will affect whole piece link transmission quality it is therefore necessary to
Realize the whole network synchronously to solve the problems, such as each synchronization zone not homology.
In prior art, many reference synchronization run the full synchronous method that implementation method typically takes common mode common view measurement technology.
As shown in figure 1, common mode common view CMCV (Common Mode Common View) measuring method receives by using two CMCV
Machine, can measure the output of locally GPS to be measured exactly with strange land using the time/frequency modular system that can not carry
Performance.I.e. at a time, the RX path of the signal of CMCV receiver A and CMCV receiver B is all through ionosphere and convection current
Layer, and they all follow the tracks of a certain specific gps satellite simultaneously, now can be approximately considered two GPS have identical
Condition of acceptance, the test being started simultaneously on the basis of them is regarded as the test carrying out with same datum, in addition for eliminating
Measurement error, two CMCV receivers must carry out identical operation to internal timing reference, and makees identical to measurement data
Process, the result recording in this case can eliminate the interference of the interventions such as ionosphere.
Common mode common view method also need to set up centralized monitoring system and frequency standard system in same position, with modular system as ratio
To benchmark, first obtain the frequency absolute error between Primary reference clock PRC and modular system, then processed by centralized monitoring system
To relative error, regulate and control PRC according to relative error, the frequency departure between reduction is to reach all synchro purpose.
Inventor is in realizing process of the present invention, although finding that common mode common view Comparison Method of the prior art can guarantee that many bases
Synchronous operation between standard, but there is following a few point defect：
1st, CMCV receiver needs to follow the tracks of gps signal comparing local the time frequency system, and due to weather, atmosphere and
The factors such as regional space, it is difficult to ensure that the CMCV receiver between each benchmark can follow the tracks of a certain specific gps satellite simultaneously, this
Sample cannot eliminate satellite position error (this is because the position at satellite to two stations is different, and in different directions, the ephemeris of satellite
Error is different) and troposphere and ionospheric additional time delay error.
2nd, CMCV receiver price is higher, and using the method, each benchmark at least should configure one end CMCV receiver, this pole
The earth increased economic investment.
Content of the invention
Embodiments provide a kind of many reference synchronization method, apparatus and system, with reference to aerial big-dipper satellite and
Landline transmission solves many reference frequencies of electric power networks and the time runs simultaneously problem entirely, improves the property of power telecom network
Can, ensure safer, the more reliable operation of power network.
To achieve these goals, embodiments provide a kind of many reference synchronization system, described system includes
Multiple reference time frequency clock nodes, are distributed in different geographic areas；Each reference time frequency clock node includes：At satellite-signal
Reason device, atomic clock, local time-frequency comparison device and local time distributor, described satellite signal processing unit,
Atomic clock and local time distributor are connected with described local time-frequency comparison device respectively；
Described satellite signal processing unit connects the satellite-signal receiving described satellite system to satellite system, according to
Described satellite-signal generates local time information Ts, and by described local time information TsIt is sent to described local time-frequency
Comparison device；
The geographic area that described atomic clock is located for described reference time frequency clock node provides frequency reference source, simultaneously to
Described local time-frequency comparison device transmission frequency benchmark Fr；
Described local time-frequency comparison device obtains PTP from the time distributor of multiple adjacent reference time-frequency clock nodes
Message signals, according to described local time information Ts, described frequency reference FrAnd multiple described PTP message signals comprise when
Between information TpGenerate lock in time benchmark Tr, and by described lock in time benchmark TrIt is sent to described local time distributor；
Described local time distributor, receives described lock in time benchmark Tr, provide described lock in time for local
Benchmark TrAnd described lock in time benchmark T will be comprisedrPTP message signals be sent to multiple adjacent reference time-frequency clock nodes.
In one embodiment, described local time-frequency comparison device includes：
Ranking operation unit, for described local time information TsAnd multiple described temporal information TpCompute weighted,
Generate lock in time information Tw；
Converting unit, for by described frequency reference FrBe converted to time signal tr；
Lock in time benchmark signal generating unit, for according to described lock in time information TwAnd time signal trDescribed generation institute
State lock in time benchmark Tr.
In one embodiment, described ranking operation unit is specifically for by multiple described temporal informations TpBe converted to many
Temporal information T that individual described local time-frequency comparison device is capable of identify thatp‘；To described local time information TsAnd when multiple described
Between information Tp' compute weighted, generate lock in time information Tw.
In one embodiment, described local time information TsSignal type be 1PPS+ToD signal.
In one embodiment, described local time-frequency comparison device has multichannel PTP input/output interface.
In one embodiment, described local time-frequency comparison device and the plurality of adjacent reference time-frequency clock node when
Between communicated using OTN/WDM mode between distributor.
In one embodiment, described satellite system includes：Beidou satellite system, GPS, Glonass and Galilean satellite
System；Described GPS, Glonass and GALILEO satellite system are standby as described Beidou satellite system.
To achieve these goals, embodiments provide a kind of many reference synchronization method, described many benchmark are same
One step process includes：
Receive the local time information T that the satellite signal processing unit of local reference time-frequency clock node sendss；
Receive frequency reference F that the atomic clock of local reference time-frequency clock node sendsr；
Obtain PTP message signals from the time distributor of multiple adjacent reference time-frequency clock nodes；
According to described local time information Ts, described frequency reference FrAnd the time that multiple described PTP message signals comprise
Information TpGenerate lock in time benchmark Tr, and by described lock in time benchmark TrIt is sent to described local time distributor, with
Make described local time distributor will comprise described lock in time benchmark TrPTP message signals be sent to multiple adjacent bases
Punctual frequency clock node.
In one embodiment, according to described local time information Ts, described frequency reference FrAnd multiple described PTP message
Temporal information T that signal packet containspGenerate lock in time benchmark Tr, including：
To described local time information TsAnd multiple described temporal information TpCompute weighted, generate lock in time information
Tw；
By described frequency reference FrBe converted to time signal tr；
According to described lock in time information TwAnd time signal trThe described lock in time benchmark T of described generationr.
In one embodiment, to described local time information TsAnd multiple described temporal information TpCompute weighted, generate
Lock in time information Tw, including：
By multiple described temporal informations TpBe converted to the time letter that multiple described local time-frequency comparison devices are capable of identify that
Breath Tp‘；
To described local time information TsAnd multiple described temporal information Tp' compute weighted, generate lock in time information
Tw.
In one embodiment, described local time information TsSignal type be 1PPS+ToD signal.
In one embodiment, described local time-frequency comparison device has multichannel PTP input/output interface.
In one embodiment, PTP message signals are obtained from the time distributor of multiple adjacent reference time-frequency clock nodes,
Including：Carry out communication using OTN/WDM mode to be communicated with the plurality of adjacent reference time-frequency clock node, obtain PTP report
Civilian signal.
To achieve these goals, the embodiment of the present invention additionally provides a kind of many reference synchronization device, described many benchmark
Synchronizer includes：
Local time information receiving unit, the satellite signal processing unit for receiving local reference time-frequency clock node is sent out
The local time information T sendings；
Frequency reference receiving unit, the frequency reference that the atomic clock for receiving local reference time-frequency clock node sends
Fr；
Message signals acquiring unit, for obtaining PTP from the time distributor of multiple adjacent reference time-frequency clock nodes
Message signals；
Lock in time benchmark signal generating unit, for according to described local time information Ts, described frequency reference FrAnd it is multiple
Temporal information T that described PTP message signals comprisepGenerate lock in time benchmark Tr, and by described lock in time benchmark TrIt is sent to
Described local time distributor, so that described local time distributor will comprise described lock in time benchmark Tr's
PTP message signals are sent to multiple adjacent reference time-frequency clock nodes.
In one embodiment, described lock in time benchmark signal generating unit, including：
Ranking operation module, for described local time information TsAnd multiple described temporal information TpCompute weighted,
Generate lock in time information Tw；
Modular converter, for by described frequency reference FrBe converted to time signal tr；
Lock in time benchmark generation module, for according to described lock in time information TwAnd time signal trDescribed generation institute
State lock in time benchmark Tr.
In one embodiment, described ranking operation module includes：
Transform subblock, for by multiple described temporal informations TpBe converted to multiple described local time-frequency comparison device energy
Temporal information T of enough identificationp‘；
Ranking operation submodule, for described local time information TsAnd multiple described temporal information Tp' it is weighted transporting
Calculate, generate lock in time information Tw.
In one embodiment, described local time information TsSignal type be 1PPS+ToD signal.
In one embodiment, described local time-frequency comparison device has multichannel PTP input/output interface.
In one embodiment, PTP message signals are obtained from the time distributor of multiple adjacent reference time-frequency clock nodes,
Including：Carry out communication using OTN/WDM mode to be communicated with the plurality of adjacent reference time-frequency clock node, obtain PTP report
Civilian signal.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, also may be used
So that other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the effect diagram of common mode common view Comparison Method in prior art；
Fig. 2 is many reference synchronization system structure diagram of the embodiment of the present invention；
Fig. 3 is the 1588v2 synchronization message interaction schematic diagram of the embodiment of the present invention；
Fig. 4 is the structured flowchart of the time-frequency comparison device of the embodiment of the present invention；
Fig. 5 is many reference synchronization method flow diagram of the embodiment of the present invention；
Fig. 6 is the method flow diagram of the S504 of Fig. 5 of the embodiment of the present invention；
Fig. 7 is the method flow diagram of the S601 of Fig. 6 of the embodiment of the present invention；
Fig. 8 is the structured flowchart of many reference synchronization device of the embodiment of the present invention；
Fig. 9 is the structured flowchart of the lock in time benchmark signal generating unit of Fig. 8 in the embodiment of the present invention；
Figure 10 is the structured flowchart of the ranking operation unit of Fig. 9 in the embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
As shown in Fig. 2 embodiments providing a kind of many reference synchronization system it is characterised in that this many benchmark is same
Step system includes multiple reference time frequency clocks (Primary Reference Time Clock PRTC) node, in Fig. 2
PRTC-1, PRTC-2, PRTC-3 ... PRTC-N-1 and PRTC-N.Each reference time frequency clock node is distributed in different geographic regions
Domain, typically with provincial administrative division geographic area, that is, each saves and typically arranges a reference time frequency clock node, but right
In the province that region is larger, such as Xinjiang Uygur Autonomous Regions, 2 PRTC nodes can be set.
As shown in Fig. 2 all comprising identical device in each reference time frequency clock node, with the PRTC-1 node in Fig. 2
As a example, PRTC-1 node includes：Satellite signal processing unit, atomic clock, time-frequency comparison device, time distributor, the Big Dipper are defended
Star and other satellite system (as GPS, Glonass, GALILEO satellite system etc.), satellite signal processing unit, atomic clock are timely
Between distributor be connected with time-frequency comparison device respectively.Satellite signal processing unit connects to big-dipper satellite and other satellite system
System, as primary satellite system, other satellite systems are as standby satellite system for big-dipper satellite.
The long run frequency accuracy of atomic clock should be better than 1E-12, and each atomic clock should have at least 1 road 1PPS input calibration
Interface, channelized frequencies benchmark output interface.When the long run frequency accuracy of atomic clock is 1E-12, it floated through the time of one day
Move as 86ns, as a reference source of full synchronizing network, have that such drift cannot meet the time and the entirely synchronous of frequency requires,
It is thus desirable to receiving the time calibration signal of local frequency comparison device when being derived from, to enter line phase school with the frequency of atomic clock itself
Standard, the frequency signal higher to export accuracy.
Satellite signal processing unit is capable of the satellite-signal of real-time reception satellite system, when obtaining local according to satellite-signal
Between information Ts, and by local time information TsIt is sent to local time-frequency comparison device.In one embodiment, this local zone time letter
Breath TsSignal type be 1PPS+ToD signal.
Atomic clock can on the basis of time-frequency clock node be located geographic area (be located save administrative region or be located save
Subregion) frequency reference source (" frequency reference output " in Fig. 1) is provided, compare to connected local time-frequency simultaneously
Device transmission frequency benchmark Fr, as frequency reference.
Local time-frequency comparison device receives the local time information T that satellite signal processing unit is sentsAnd atomic clock sends out
Frequency reference F comer, as the partial data of time and Frequency Synchronization between multiple reference time frequency clock nodes.In order to realize
Synchronous, local time-frequency comparison device also needs to obtain PTP from the time distributor of multiple adjacent reference time-frequency clock nodes
Message signals, all comprise temporal information T of each node in these PTP message signalsp.
Time and frequency for ensureing many reference synchronization system meet all synchro requirement, carry out between adjacent PRTC node
PTP communication process of crucial importance, should ensure that first local reference time-frequency clock node can obtain exactly adjacent node when
Between and frequency information, so, time-frequency comparison device should have multichannel PTP input/output port, to receive from multiple PRTC section
PTP ((the 1588v2)) message of point and be compared weighting and obtain more accurate Time-Frequency Information.Adjacent reference time-frequency clock section
The process of point PTP synchronization interacting message is as shown in figure 3, specific as follows：
A) master clock sends a Sync message to from clock, and records the moment t of this message transmission1,
B) receive master clock Sync message from clock, and record the moment t receiving2, master clock can pass through
Following two modes are by timestamp t1It is sent to from clock：
Timestamp is placed in Sync message, this requires point-device bottom hardware to process, and this mode is referred to as
one step.
Timestamp is placed on transmission in Follow_Up message, which is referred to as two step.
C) from when clockwise master clock send Delay_Req message, and record its delivery time t3.
D) master clock receives Delay_Req message, and records the moment t receiving4.
E) master clock passes through Delay_Resp by t4It is sent to from clock.
So, all of time information t can be received from clock1, t2, t3, t4, according to these time informations, can calculate
Go out itself time delay D elay and master clock between and (assume Delay=tms=tsm) and time deviation Offset, and realize and master
The time synchronized of clock.
The time-frequency comparison device (from clock) of local PRTC node is adjacent the time distributor of PRTC node (when main
Clock), local time distributor (master clock) be adjacent PRTC node time-frequency comparison device (from clock) carry out PTP lead to
It is necessary to ensure the symmetry in the path of transmission during letter, that is, ensure to assume Delay=tms=tsmSet up, guarantee is not passed
The time error impact that defeated unsymmetry introduces.In order to ensure the symmetry in the path transmitted, the present invention can adopt OTN/WDM
Mode is communicated.
Described in above-mentioned Fig. 3, local time-frequency comparison device from multiple adjacent reference time-frequency clock nodes when
Between distributor when obtaining PTP message signals, local time-frequency comparison device as from clock, multiple adjacent reference time-frequency clocks
The time distributor of node is all as master clock.
The local time-frequency comparison device moment receives local time information Ts, described frequency reference FrAnd multiple PTP report
Temporal information T that civilian signal packet containspAfterwards, according to local time information Ts, described frequency reference FrAnd multiple described PTP message
Temporal information T that signal packet containsp, lock in time benchmark T can be generatedr, and by lock in time benchmark TrIt is sent to the local time
Distributor.
Local time distributor receives the lock in time benchmark T that local time-frequency comparison device is sentr, except for originally
Ground provides lock in time benchmark TrOutward in addition it is also necessary to lock in time benchmark T will be comprisedrPTP message signals be sent to multiple adjacent bases
Punctual frequency clock node.
In one embodiment, as shown in figure 4, local time-frequency comparison device includes：Ranking operation unit 401, conversion is single
Unit 402 and lock in time benchmark signal generating unit 403.
Ranking operation unit 401 is specifically for local time information TsAnd multiple temporal information TpCompute weighted, raw
Become lock in time information Tw；Converting unit 402 is specifically for by described frequency reference FrBe converted to time signal tr；Lock in time
Benchmark signal generating unit 403 is specifically for according to described lock in time information TwAnd time signal trGenerate described lock in time benchmark
Tr(for example can be by seeking TwWith trMeansigma methodss try to achieve).
Ranking operation unit 401 is to local time information TsAnd multiple temporal information TpBefore computing weighted, it will be many for needing
Individual temporal information TpBe converted to temporal information T that multiple described local time-frequency comparison devices are capable of identify thatp' and then to local when
Between information TsAnd multiple temporal information Tp' compute weighted, generate lock in time information Tw.
During the ranking operation of ranking operation unit 401, the selection of weight coefficient can have multiple methods, with reference to tool
The example of body illustrates.For example, time-frequency comparison device t0 reception to multiple adjacent reference time-frequency clock nodes when
Between information Tp' respectively b, c, d, local time information Ts=a, time-frequency comparison device is firstly the need of judging in time a, b, c, d to be
No have abnormal time, if d is big with the absolute time deviation of standard time (can be the time that previous time synchronized obtains)
In a certain preset value, then give up time d, be weighted with time a, b, c.For tri- times of a, b, c, weight coefficient can
To take 1/3 (and taking the meansigma methodss of three) respectively.According to weight coefficient x0=1/3, time a, b, the c in t0 moment are weighted
Computing, obtains lock in time information Tw=(a+b+c)/3.This weight coefficient 1/3 can as the weight coefficient of subsequent time t1,
Assume subsequent time t1, local time information Ts=a1, temporal information T of multiple adjacent reference time-frequency clock nodep' respectively
B1, c1, d1 (hypothesis continues to give up), compute weighted to time a1, b1, c1, obtain lock in time information Tw=(a1+b1+
c1)/3.In addition, it is necessary to subsequent time is calculated (when assuming t2 according to time a1, b1, c1 (assuming a1 ∠ b1 ∠ c1) of moment t1
Carve) weight coefficient, the t2 moment adds three time point weight coefficients and is respectively： Above-mentioned weighting system
The algorithm of number only enumerates, and is used for limiting.
In the calibration process of many reference synchronization system of foregoing description, the atomic clock of PRTC node passes through calibration and obtains other
The frequency information of adjacent PRTC node, its effect is equivalent to one atomic clock group of formation, and the atomic clock between atomic clock group is carried out
Mutually compare, make the precision of each atomic clock output frequency be better than 1E-13, that is, can guarantee that all of rate-adaptive pacemaker of the whole network is basically identical
Reach the full synchronization of frequency.The time-frequency comparison device of PRTC node can be obtained by carrying out PTP message interaction with other PRTC nodes
The on-site temporal information of other PRTC, by these temporal informations are carried out with conversion Calculation weighting process, you can obtain with
The UTC consistent time, can guarantee that the time consistency of the whole network and absolute precision is enough to ensure that end-to-end the wanting less than 1us in each synchronization zone
Ask.Pass through ground PTP message interaction between each PRTC node to process, being total to of each node also can be reached by ground transmission
Mould regards effect altogether.
The message interaction of the PTP between each PRTC node, and local satellite received signal processing module and atom
The interphase interaction of clock, can reach the local frequency of PRTC node and the absolute precision of time output meets all synchro wanting
Ask, the closed loop that it forms simultaneously enhances the vigorousness of whole system.For the node of single synchronization zone, it is put first
Take off past single utilization gps satellite signal to reach time synchronized and Frequency Synchronization, but the north of primary China independent research
Bucket satellite system, will not be affected on the malicious interference of GPS by abroad for this.And each synchronization zone node all can obtain it
The temporal frequency information of its synchronization zone node, when arbitrary single synchronization zone one malfunctions, it can be by other synchronization zones
The correct Time-Frequency Information of node remains to obtain correct time and frequency reference reference signal ensureing this synchronization zone.
The time-frequency comparison device of the present invention will pass through the frequency reference to the atomic clock receiving, satellite-signal processing module
Time reference benchmark and other node time distribution system be weighted between temporal information contained by PTP message compare,
Ensure the absolute accuracy of its output time and frequency so that the time netting all nodes all consistent with frequency it is ensured that the whole network
Full synchronous operation.
After each province disposes above-mentioned PRTC node, save inter-sync net using this system as a reference source, using master-slave synchronisation side
Formula, reaches full synchronous operation inside the province, simultaneously the time between each province and frequency departure can control minimum range of error it
Interior, that is, can guarantee that the full synchronous operation that national electric power is synchronously netted.
In a word, using many reference synchronization system, the present invention not only can guarantee that power telecom network frequency and the full synchronization of time,
And obtain in terms of vigorousness and safety and greatly improve.Frequency is realized in power system and the full synchronous operation of time is permissible
Ensure the quality exchanging information between Ge great area, each province, improve the overall performance of power frequency synchronization net and clock synchronization system,
The service quality of each service network is made to have obtained great lifting.
As shown in figure 5, embodiments providing a kind of many reference synchronization method, this many reference synchronization method includes：
S501：Receive the local time information T that the satellite signal processing unit of local reference time-frequency clock node sendss；
S502：Receive frequency reference F that the atomic clock of local reference time-frequency clock node sendsr；
S503：Obtain PTP message signals from the time distributor of multiple adjacent reference time-frequency clock nodes；
S504：According to described local time information Ts, described frequency reference FrAnd multiple described PTP message signals comprise
Temporal information TpGenerate lock in time benchmark Tr, and by described lock in time benchmark TrIt is sent to described local time distribution
Device, so that described local time distributor will comprise described lock in time benchmark TrPTP message signals be sent to many
Individual adjacent reference time-frequency clock node.
The executive agent of the many reference synchronization method shown in Fig. 5 is time-frequency comparison device.Flow process as shown in Figure 5 understands,
The present invention pass through time-frequency comparison device from satellite signal processing unit, atomic clock and multiple adjacent reference time-frequency clock node when
Between distributor obtain local time information T respectivelys, described frequency reference FrAnd the time that multiple described PTP message signals comprise
Information Tp, by TsAnd TpWeighting process, generate lock in time information Tw, with frequency reference FrThe time signal being converted to
trGenerate described lock in time benchmark Tr, finally by this lock in time benchmark TrBe sent to atomic clock so that atomic clock reach higher
Time reference, for time distributor provide 1PPS time signal；When time distributor is except being responsible for this reference time frequency
The synchronization zone that clock node is located provides time base source, also carries out PTP communication with other PRTC node time comparison devices simultaneously.
By the present invention, not only can guarantee that power telecom network frequency and the full synchronization of time, and can ensure that between Ge great area, each province
The quality exchanging information, improves the overall performance of power frequency synchronization net and clock synchronization system.
By the flow process shown in Fig. 5, the time and frequency for ensureing many reference synchronization system meets all synchro wanting
Ask, the process carrying out PTP communication between adjacent PRTC node is of crucial importance, should ensure that local reference time-frequency clock node can be accurate first
Really obtain time and the frequency information of adjacent node, so, time-frequency comparison device should have multichannel PTP input/output port,
It is compared weighting with the PTP message receiving from multiple PRTC nodes and obtain more accurate Time-Frequency Information.
As shown in fig. 6, in one embodiment, S504 includes：
S601：To described local time information TsAnd multiple described temporal information TpCompute weighted, generate lock in time
Information Tw；
S602：By described frequency reference FrBe converted to time signal tr；
S603：According to described lock in time information TwAnd time signal trThe described lock in time benchmark T of described generationr.
As shown in fig. 7, in one embodiment, above-mentioned S601 comprises the steps：
S701：By multiple described temporal informations TpBe converted to that multiple described local time-frequency comparison devices are capable of identify that when
Between information Tp‘；
S702：To described local time information TsAnd multiple described temporal information Tp' compute weighted, when generating synchronous
Between information Tw.
In one embodiment, in S501, the local time information T that satellite signal processing unit sendssSignal type be
1PPS+ToD signal.
It should be noted that the time-frequency comparison device of local PRTC node is adjacent the time distributor of PRTC node
Carry out it is necessary to ensure the symmetry in the path of transmission during PTP communication, guarantee is not subject to transmit the time that unsymmetry introduces
Error affects.In order to ensure the symmetry in the path transmitted, the present invention can be to be communicated using OTN/WDM mode.
Using many reference synchronization method of the present invention, can guarantee that all of rate-adaptive pacemaker of the whole network is basically identical and reach frequency
Rate entirely synchronous is it is ensured that the time consistency of the whole network and absolute precision is enough to ensure that the end-to-end requirement less than 1us in each synchronization zone.Respectively
Pass through ground PTP message interaction between PRTC node to process, the common mode that also can reach each node by ground transmission is altogether
Depending on effect.
The time-frequency comparison device of the present invention will pass through the frequency reference to the atomic clock receiving, satellite-signal processing module
Time reference benchmark and other node time distribution system be weighted between temporal information contained by PTP message compare,
Ensure the absolute accuracy of its output time and frequency so that the time netting all nodes all consistent with frequency it is ensured that the whole network
Full synchronous operation.
After each province disposes above-mentioned PRTC node, save inter-sync net using this system as a reference source, using master-slave synchronisation side
Formula, reaches full synchronous operation inside the province, simultaneously the time between each province and frequency departure can control minimum range of error it
Interior, that is, can guarantee that the full synchronous operation that national electric power is synchronously netted.
In a word, the present invention not only can guarantee that power telecom network frequency and the full synchronization of time, and in vigorousness and safety
Property aspect obtain and greatly improve.Frequency is realized in power system and the full synchronous operation of time can ensure that Ge great area, each province it
Between the quality that exchanges information, improve the overall performance of power frequency synchronization net and clock synchronization system, make the service of each service network
Quality has obtained great lifting.
As shown in figure 8, embodiments providing a kind of many reference synchronization device, described many reference synchronization device bag
Include：Ranking operation unit 801, frequency reference receiving unit 802, message signals acquiring unit 803 and lock in time benchmark generate
Unit 804.
Local time information receiving unit 801 is used for receiving the satellite signal processing unit of local reference time-frequency clock node
The local time information T sendings；
Frequency reference receiving unit 802 is used for receiving the frequency reference that the atomic clock of local reference time-frequency clock node sends
Fr；
Message signals acquiring unit 803 is used for obtaining from the time distributor of multiple adjacent reference time-frequency clock nodes
PTP message signals；
Lock in time benchmark signal generating unit 804 is used for according to described local time information Ts, described frequency reference FrAnd it is many
Temporal information T that individual described PTP message signals comprisepGenerate lock in time benchmark Tr, and by described lock in time benchmark TrSend
To described local time distributor, so that described local time distributor will comprise described lock in time benchmark Tr's
PTP message signals are sent to multiple adjacent reference time-frequency clock nodes.
As shown in Figure 8, the present invention passes through time-frequency comparison device from satellite signal processing unit, atomic clock and multiple adjacent base
The time distributor of punctual frequency clock node obtains local time information T respectivelys, described frequency reference FrAnd multiple described PTP
Temporal information T that message signals comprisep, by TsAnd TpWeighting process, generate lock in time information Tw, with frequency reference Fr
Time signal t being converted torGenerate described lock in time benchmark Tr, finally by this lock in time benchmark TrIt is sent to atomic clock,
Make atomic clock reach higher time reference, provide 1PPS time signal for time distributor；Time distributor except
Be responsible for this reference time frequency clock node be located synchronization zone provide time base source, simultaneously also with other PRTC node time ratios
PTP communication is carried out to device.By the present invention, not only can guarantee that power telecom network frequency and the full synchronization of time, and permissible
Ensure the quality exchanging information between Ge great area, each province, improve the overall performance of power frequency synchronization net and clock synchronization system.
As shown in Figure 8, time and frequency for ensureing many reference synchronization system meet all synchro requirement, adjacent PRTC
The process carrying out PTP communication between node is of crucial importance, should ensure that local reference time-frequency clock node can obtain phase exactly first
The time of neighbors and frequency information, so, time-frequency comparison device should have multichannel PTP input/output port, is derived from receiving
The PTP message of multiple PRTC nodes and be compared weighting and obtain more accurate Time-Frequency Information.
In one embodiment, as shown in figure 9, lock in time benchmark signal generating unit 804, including：Ranking operation module 901,
Modular converter 902 and lock in time benchmark generation module 903.
Ranking operation module 901 is used for described local time information TsAnd multiple described temporal information TpIt is weighted transporting
Calculate, generate lock in time information Tw；
Modular converter 902 is used for described frequency reference FrBe converted to time signal tr；
Lock in time benchmark generation module 903 is used for according to described lock in time information TwAnd time signal trDescribed generation
Described lock in time benchmark Tr.
In one embodiment, as shown in Figure 10, ranking operation module 901 includes：Transform subblock 1001 and ranking operation
Submodule 1002.
Transform subblock 1001 is used for multiple described temporal informations TpBe converted to multiple described local time-frequencies and compare dress
Put temporal information T being capable of identify thatp‘；
Ranking operation submodule 1002 is used for described local time information TsAnd multiple described temporal information Tp' carry out adding
Power computing, generates lock in time information Tw.
In one embodiment, in S501, the local time information T that satellite signal processing unit sendssSignal type be
1PPS+ToD signal.
It should be noted that the time-frequency comparison device of local PRTC node is adjacent the time distributor of PRTC node
Carry out it is necessary to ensure the symmetry in the path of transmission during PTP communication, guarantee is not subject to transmit the time that unsymmetry introduces
Error affects.In order to ensure the symmetry in the path transmitted, the present invention can be to be communicated using OTN/WDM mode.
Using many reference synchronization device of the present invention, can guarantee that all of rate-adaptive pacemaker of the whole network is basically identical and reach frequency
Rate entirely synchronous is it is ensured that the time consistency of the whole network and absolute precision is enough to ensure that the end-to-end requirement less than 1us in each synchronization zone.Respectively
Pass through ground PTP message interaction between PRTC node to process, the common mode that also can reach each node by ground transmission is altogether
Depending on effect.
The time-frequency comparison device of the present invention will pass through the frequency reference to the atomic clock receiving, satellite-signal processing module
Time reference benchmark and other node time distribution system be weighted between temporal information contained by PTP message compare,
Ensure the absolute accuracy of its output time and frequency so that the time netting all nodes all consistent with frequency it is ensured that the whole network
Full synchronous operation.
After each province disposes above-mentioned PRTC node, save inter-sync net using this system as a reference source, using master-slave synchronisation side
Formula, reaches full synchronous operation inside the province, simultaneously the time between each province and frequency departure can control minimum range of error it
Interior, that is, can guarantee that the full synchronous operation that national electric power is synchronously netted.
In a word, the present invention not only can guarantee that power telecom network frequency and the full synchronization of time, and in vigorousness and safety
Property aspect obtain and greatly improve.Frequency is realized in power system and the full synchronous operation of time can ensure that Ge great area, each province it
Between the quality that exchanges information, improve the overall performance of power frequency synchronization net and clock synchronization system, make the service of each service network
Quality has obtained great lifting.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can be using complete hardware embodiment, complete software embodiment or the reality combining software and hardware aspect
Apply the form of example.And, the present invention can be using in one or more computers wherein including computer usable program code
The upper computer program implemented of usable storage medium (including but not limited to disk memory, CD-ROM, optical memory etc.) produces
The form of product.
The present invention is the flow process with reference to method according to embodiments of the present invention, equipment (system) and computer program
Figure and/or block diagram are describing.It should be understood that can be by each stream in computer program instructions flowchart and/or block diagram
Flow process in journey and/or square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processor instructing general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device is to produce
A raw machine is so that produced for reality by the instruction of computer or the computing device of other programmable data processing device
The device of the function of specifying in present one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing device with spy
Determine in the computer-readable memory that mode works so that the instruction generation inclusion being stored in this computer-readable memory refers to
Make the manufacture of device, this command device realize in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or
The function of specifying in multiple square frames.
These computer program instructions also can be loaded in computer or other programmable data processing device so that counting
On calculation machine or other programmable devices, execution series of operation steps to be to produce computer implemented process, thus in computer or
On other programmable devices, the instruction of execution is provided for realizing in one flow process of flow chart or multiple flow process and/or block diagram one
The step of the function of specifying in individual square frame or multiple square frame.
Apply specific embodiment in the present invention principle of the present invention and embodiment are set forth, above example
Explanation be only intended to help and understand the method for the present invention and its core concept；Simultaneously for one of ordinary skill in the art,
According to the thought of the present invention, all will change in specific embodiments and applications, in sum, in this specification
Hold and should not be construed as limitation of the present invention.
Claims (16)
1. a kind of many reference synchronization system, it is characterised in that described system includes multiple reference time frequency clock nodes, is distributed in
Different geographic areas；Each reference time frequency clock node includes：Satellite signal processing unit, atomic clock, local when frequency ratio
To device and local time distributor, described satellite signal processing unit, atomic clock and local time distributor
It is connected with described local time-frequency comparison device respectively；Wherein,
Described satellite signal processing unit connects the satellite-signal receiving described satellite system to satellite system, according to described
Satellite-signal generate local time information Ts, and by described local time information TsIt is sent to described local time-frequency to compare
Device；
The geographic area that described atomic clock is located for described reference time frequency clock node provides frequency reference source, simultaneously to described
Local time-frequency comparison device transmission frequency benchmark Fr；
Described local time-frequency comparison device obtains PTP message from the time distributor of multiple adjacent reference time-frequency clock nodes
Signal, according to described local time information Ts, described frequency reference FrAnd the time letter that multiple described PTP message signals comprise
Breath TpGenerate lock in time benchmark Tr, and by described lock in time benchmark TrIt is sent to described local time distributor；
Described local time distributor, receives described lock in time benchmark Tr, provide described lock in time benchmark T for localr
And described lock in time benchmark T will be comprisedrPTP message signals be sent to multiple adjacent reference time-frequency clock nodes；
Wherein, described local time-frequency comparison device includes：
Ranking operation unit, for described local time information TsAnd multiple described temporal information TpCompute weighted, generate
Lock in time information Tw；
Converting unit, for by described frequency reference FrBe converted to time signal tr；
Lock in time benchmark signal generating unit, for according to described lock in time information TwAnd time signal trDescribed generation is described same
Step time reference Tr.
2. many reference synchronization system according to claim 1 is it is characterised in that described ranking operation unit is specifically used
In by multiple described temporal informations TpBe converted to temporal information T that multiple described local time-frequency comparison devices are capable of identify thatp‘；
To described local time information TsAnd multiple described temporal information Tp' compute weighted, generate lock in time information Tw.
3. many reference synchronization system according to claim 1 is it is characterised in that described local time information TsClass signal
Type is 1PPS+ToD signal.
4. many reference synchronization system according to claim 1 is it is characterised in that described local time-frequency comparison device has
Multichannel PTP input/output interface.
5. many reference synchronization system according to claim 1 is it is characterised in that described local time-frequency comparison device and institute
Communicated using OTN/WDM mode between the time distributor stating multiple adjacent reference time-frequency clock nodes.
6. many reference synchronization system according to claim 1 is it is characterised in that described satellite system includes：The Big Dipper is defended
Star system, GPS, Glonass and GALILEO satellite system；Described GPS, Glonass and GALILEO satellite system are as described north
Bucket satellite system standby.
7. a kind of many reference synchronization method is it is characterised in that described many reference synchronization method includes：
Receive the local time information T that the satellite signal processing unit of local reference time-frequency clock node sendss；
Receive frequency reference F that the atomic clock of local reference time-frequency clock node sendsr；
Obtain PTP message signals from the time distributor of multiple adjacent reference time-frequency clock nodes；
According to described local time information Ts, described frequency reference FrAnd the temporal information that multiple described PTP message signals comprise
TpGenerate lock in time benchmark Tr, and by described lock in time benchmark TrIt is sent to described local time distributor, so that institute
State local time distributor and will comprise described lock in time benchmark TrPTP message signals when being sent to multiple adjacent reference
Frequency clock node；
Wherein, according to described local time information Ts, described frequency reference FrAnd multiple described PTP message signals comprise when
Between information TpGenerate lock in time benchmark Tr, including：
To described local time information TsAnd multiple described temporal information TpCompute weighted, generate lock in time information Tw；
By described frequency reference FrBe converted to time signal tr；
According to described lock in time information TwAnd time signal trThe described lock in time benchmark T of described generationr.
8. many reference synchronization method according to claim 7 is it is characterised in that to described local time information TsAnd it is multiple
Described temporal information TpCompute weighted, generate lock in time information Tw, including：
By multiple described temporal informations TpBe converted to temporal information T that multiple described local time-frequency comparison devices are capable of identify thatp‘；
To described local time information TsAnd multiple described temporal information Tp' compute weighted, generate lock in time information Tw.
9. many reference synchronization method according to claim 8 is it is characterised in that described local time information TsClass signal
Type is 1PPS+ToD signal.
10. many reference synchronization method according to claim 8 is it is characterised in that described local time-frequency comparison device has
There is multichannel PTP input/output interface.
11. many reference synchronization methods according to claim 7 are it is characterised in that from multiple adjacent reference time-frequency clock sections
The time distributor of point obtains PTP message signals, including：Carry out communicating and the plurality of adjacent base using OTN/WDM mode
Punctual frequency clock node is communicated, and obtains PTP message signals.
A kind of 12. many reference synchronization devices are it is characterised in that described many reference synchronization device includes：
Local time information receiving unit, the satellite signal processing unit for receiving local reference time-frequency clock node sends
Local time information Ts；
Frequency reference receiving unit, frequency reference F that the atomic clock for receiving local reference time-frequency clock node sendsr；
Message signals acquiring unit, for obtaining PTP message from the time distributor of multiple adjacent reference time-frequency clock nodes
Signal；
Lock in time benchmark signal generating unit, for according to described local time information Ts, described frequency reference FrAnd it is multiple described
Temporal information T that PTP message signals comprisepGenerate lock in time benchmark Tr, and by described lock in time benchmark TrIt is sent to described
Local time distributor, so that described local time distributor will comprise described lock in time benchmark TrPTP report
Civilian signal is sent to multiple adjacent reference time-frequency clock nodes；
Wherein, described lock in time benchmark signal generating unit, including：
Ranking operation module, for described local time information TsAnd multiple described temporal information TpCompute weighted, generate
Lock in time information Tw；
Modular converter, for by described frequency reference FrBe converted to time signal tr；
Lock in time benchmark generation module, for according to described lock in time information TwAnd time signal trDescribed generation is described same
Step time reference Tr.
13. many reference synchronization devices according to claim 12 are it is characterised in that described ranking operation module includes：
Transform subblock, for by multiple described temporal informations TpBe converted to multiple described local time-frequency comparison devices can know
Other temporal information Tp‘；
Ranking operation submodule, for described local time information TsAnd multiple described temporal information Tp' compute weighted,
Generate lock in time information Tw.
14. many reference synchronization devices according to claim 13 are it is characterised in that described local time information TsSignal
Type is 1PPS+ToD signal.
15. many reference synchronization devices according to claim 13 are it is characterised in that described local time-frequency comparison device has
There is multichannel PTP input/output interface.
16. many reference synchronization devices according to claim 12 are it is characterised in that from multiple adjacent reference time-frequency clock sections
The time distributor of point obtains PTP message signals, including：Carry out communicating and the plurality of adjacent base using OTN/WDM mode
Punctual frequency clock node is communicated, and obtains PTP message signals.
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| CN104935394A (en) * | 2015-06-26 | 2015-09-23 | 上海市计量测试技术研究院 | Time signal generator and time tester |
| CN106788853B (en) * | 2017-01-26 | 2018-12-07 | 华为技术有限公司 | A kind of clock synchronization apparatus and method |
| CN108259108B (en) * | 2018-01-26 | 2019-09-27 | 郑州云海信息技术有限公司 | A kind of homologous clock system of multi node server redundancy and clock selection method |
| CN109586715A (en) * | 2018-11-20 | 2019-04-05 | 中国电子科技集团公司第五十四研究所 | A kind of Multi-Source Integration clock-generating device |
| CN110286579B (en) * | 2019-05-08 | 2021-04-06 | 全球能源互联网研究院有限公司 | Joint clock acquisition method, device, equipment and computer readable storage medium |
| CN114900262A (en) * | 2022-05-07 | 2022-08-12 | 沈阳安信合科技有限公司 | Method and device for identifying fault of satellite clock equipment |
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| CN202818320U (en) * | 2012-08-30 | 2013-03-20 | 上海远景数字信息技术有限公司 | Clock server based on multi-mode clock source synchronization |
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