CN103036635A - Merging unit synchronization time hack method adaptive for relay protection application and based on Institute of Electrical and Electronic Engineers (IEEE) 1588 - Google Patents
Merging unit synchronization time hack method adaptive for relay protection application and based on Institute of Electrical and Electronic Engineers (IEEE) 1588 Download PDFInfo
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- CN103036635A CN103036635A CN2012105429616A CN201210542961A CN103036635A CN 103036635 A CN103036635 A CN 103036635A CN 2012105429616 A CN2012105429616 A CN 2012105429616A CN 201210542961 A CN201210542961 A CN 201210542961A CN 103036635 A CN103036635 A CN 103036635A
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- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0685—Clock or time synchronisation in a node; Intranode synchronisation
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- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
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Abstract
This invention belongs to the technical field of the power transmission and transformation, and particularly relates to a merging unit synchronization time hack method adaptive for relay protection application and based on an Institute of Electrical and Electronic Engineers (IEEE) 1588 time hack way in a smart substation. A merging unit switches in three time hack states including a step out state, a synchronous follow state and a synchronous punctual state. Based on the hypothesis that a merge unit crystal frequency can not suddenly change, a self clock is compared with a time service clock, if a time difference is beyond a set range, a time hack message is given up, and an accidental big problem that a protection device is caused to be closed and locked in a short time in the actual application process of the IEEE 1588 is solved. According to full test verification, short-time anomalies of all kinds of clock systems are avoided on the basis that the relay protection system reliability is guaranteed, and the merging unit synchronization time hack method adaptive for the relay protection application and based on the IEEE 1588 can be directly applied to a merging unit applied in engineering application.
Description
Technical field
The invention belongs to the T ﹠ D Technology field, particularly in a kind of intelligent substation based on IEEE1588 to the time mode the synchronous setting means of merge cells used of adaptation relaying protection.
Background technology
Electric power system is an integral body that is made of links such as the production of electric energy, conveying, distribution and consumption, occupies very consequence in national economy.The intelligent grid technology is rapidly developed in a lot of countries in recent years as the basis and the prerequisite that realize low-carbon (LC) electric power.China proposes to build take extra-high voltage grid as key rack, electric network coordination development at different levels, the strong intelligent grid of unification with informationization, automation, interactive feature.The task of voltage transitions and electric energy secondary distribution is being undertaken as an important step in the electric power system by transformer station.Intelligent substation is one of core content of strong intelligent grid, it is important part, also be the important support that realizes wind energy, solar energy equal energy source access electrical network, can ground satisfy intelligent grid informationization, automation, interactive requirement technically with on the function.
The synchronized sampling of the electric parameters information such as tradition transformer substation voltage, electric current is finished in protective device; sample-synchronous collection between the different pieces of information passage of protective device is to keep pulse to realize by the sampling that sends; do not rely on external sync to the time signal, do not need unified clock source.Different from traditional transformer station, interior all intelligent electronic devices (Intelligential Electrical Device, IED) of intelligent substation must guarantee synchronous each other, and synchronous with the outer synchronous signal source.In case lose outer synchronous signal or equipment to the time abnormal, will cause the protection blocking of entirely standing, out of service, have a strong impact on the safe and stable operation of electric power system.Merge cells is as the important component part of electronic mutual inductor and protective device interface; its major function is that three-phase voltage, the current data of the synchronization that will collect gathers according to certain formatted output and carry out information processing and operation to the second protection control appliance, so in fact the clock synchronous of each IED is exactly the clock synchronous of merge cells.
At present, in the transformer station clock synchronization mode commonly used have pulse to the time, the IRIG-B code to the time, simple network synchronously to the time (SNTP) and precision net synchronised clock (IEEE1588) etc.The IEC61850 standard is according to the different application of transformer station, and IED in the transformer station has been proposed the synchronization accuracy requirement of different brackets, and the highest ranking required precision reaches 1 μ s.IEEE1588 precision clock agreement (PTP) is as the clock protocols that is applied to Industry Control and fields of measurement, and the mode by software and hardware combines adopts target mode when physical layer hardware is beaten, and can make its synchronization accuracy reach the submicrosecond level.Can satisfy the synchronization accuracy requirement of all equipment of transformer station.
Summary of the invention
Also be in pilot phase in the construction that is applied in intelligent substation of IEEE1588 at present, because switch unexpected problem of wrong setting residence time when transmitting 1588 message has appearred in engineering site and laboratory, cause this high-precision network to the time technology application hindered.Saltus step occurs in (Merge Unit, the MU) time of merge cells when above-mentioned situation occurs, and the sequence number of output is discontinuous, thereby the protective relaying device locking is out of service.From to the time system specification requirement, is the time saltus step that any reason should not appear in master clock or switch certainly.Can escape the unusual function of this class if time service equipment has possessed, just improve synchronous reliability.Based on this idea, the present invention proposes a kind of systematic solution, make merge cells intelligence to determine this class unusual, output characteristic guarantees continuity and the reliability of relay protected operation.
The present invention is based on the hypothesis that the merge cells crystal oscillator frequency can not suddenly change, self clock and time service clock compared, the time difference exceed setting range then abandon this to the time message.On the basis of this basic principle, take into full account the timekeeping performance of equipment and formed a kind of synchronous setting means of merge cells of using based on the adaptation relaying protection of IEEE1588 such as abnormal conditions such as master clock saltus step, merge cells restart.This method can escape the unusual in short-term of all kinds of clock systems on the basis that guarantees the relaying protection system reliability through sufficient verification experimental verification.
The overall principle of the present invention:
1, merge cells can not the number of jumping in synchronous regime, protects not locking.
2, master clock is whole second punctual along can not saltus step, second following time deviation adjustment can adopt each to the time cycle 500ns step-length.
The present invention is achieved by the following technical solutions:
Based on the synchronous setting means of merge cells that the adaptation relaying protection of IEEE1588 is used, merge cells three kinds to the time switch between state: desynchronizing state, synchronously following state, synchronously punctual state;
(1) switching condition of " desynchronizing state " to " synchronously following state " is: N continuous 1 (N1 ∈ [2,60]) individual to the time cycle, time service source time homogeneity error is less than T1 (T1 ∈ [2,4]) us, this moment, merge cells drew sequence number; N continuous 2 (N2 ∈ [60,120]) individual to the time cycle, time service source time homogeneity error is less than T1 (T1 ∈ [2,4]) us;
(2) " synchronously following state " to the switching condition of " synchronously punctual state " is: with time service source absolute time error greater than T2 (T2 ∈ [5,125]) us(1 time wrong to the time), the startup timer of keeping time;
(3) " synchronously punctual state " has 2 to the switching condition of " desynchronizing state ": punctual timer timing is more than or equal to T3 (T3=5,60) min; N continuous 3 (N3 ∈ [2,60]) frame message and merge cells absolute time poor greater than T2 (T2 ∈ [5,125]) us and long-time uniformity less than T1 (T1 ∈ [2,4]) us;
(4) " synchronously punctual state " to the switching condition of " synchronously following state " is: N continuous 4 (N4 ∈ [3,20]) the frame clock source to the time message and merge cells absolute time poor less than or equal to T4 (T4 ∈ [5,125]) the us long-time uniformity is less than T1 (T1 ∈ [2,4]) us, timer is closed in the then punctual timer zero clearing of merge cells;
(5) merge cells is in " synchronously following state ": with time service source absolute time error less than T5 (T5 ∈ [5,20]) us, by once also repeatedly the time is adjusted with the time service source synchronous.
Require to be 4us/10min in that merge cells is punctual, by following parameter the switching index be set when sample frequency is 4000 points/second:
(1) switching condition of " desynchronizing state " to " synchronously following state " is: N continuous 1=10 to the time cycle, time service source time homogeneity error is less than T1=3us, this moment, merge cells drew sequence number; N continuous 2=64 to the time cycle, time service source time homogeneity error is less than T1=3us;
(2) " synchronously following state " to the switching condition of " synchronously punctual state " is: with time service source absolute time error greater than T2=10us(1 time wrong to the time), the startup timer of keeping time;
(3) " synchronously punctual state " has 2 to the switching condition of " desynchronizing state ": punctual timer timing is more than or equal to T3=10min; N continuous 3=10 frame message and merge cells absolute time poor greater than T2=10us and long-time uniformity less than T1=3us;
(4) " synchronously punctual state " to the switching condition of " synchronous following state " is: N continuous 4=10 frame clock source to the time message and merge cells absolute time poor less than or equal to T4=10us and long-time uniformity less than T1=3us, timer is closed in the then punctual timer zero clearing of merge cells;
(5) merge cells is in " synchronously following state ": with time service source absolute time error less than T5=10us, by once also repeatedly the time is adjusted with the time service source synchronous.
Require to be 48us/2h in that merge cells is punctual, by following parameter the switching index be set when sample frequency is 4000 points/second:
(1) switching condition of " desynchronizing state " to " synchronously following state " is: N continuous 1=10 to the time cycle, time service source time homogeneity error is less than T1=3us, this moment, merge cells drew sequence number; N continuous 2=120 to the time cycle, time service source time homogeneity error is less than T1=3us;
(2) " synchronously following state " to the switching condition of " synchronously punctual state " is: with time service source absolute time error greater than T2=10us(1 time wrong to the time), the startup timer of keeping time;
(3) " synchronously punctual state " has 2 to the switching condition of " desynchronizing state ": punctual timer timing is more than or equal to T3=60min; N continuous 3=60 frame message and merge cells absolute time poor greater than T2=10us and long-time uniformity less than T1=3us;
(4) " synchronously punctual state " to the switching condition of " synchronous following state " is: N continuous 4=10 frame clock source to the time message and merge cells absolute time poor less than or equal to T4=40us and long-time uniformity less than T1=3us, timer is closed in the then punctual timer zero clearing of merge cells;
(5) merge cells is in " synchronously following state ": with time service source absolute time error less than T5=40us, by once also repeatedly the time is adjusted with the time service source synchronous.
Advantage of the present invention and effect are: the present invention can use IEEE1588 to the time technology intelligent substation in; avoid in actual motion frequent occur because switch and master clock cause the merge cells output abnormality in short-term unusually, cause the problem that affects transformer station's reliability service of relaying protection locking.Significantly improve the merge cells synchronization dependability, satisfy the reliability of relay protection requirement.Of the present invention applying, will promote IEEE1588 to the time technology, the application of relaying protection network Sampling techniques in the intelligent substation engineering.
Description of drawings
Fig. 1 be in the synchronous setting means of the present invention merge cells to the time change schematic diagram between state and state thereof.
Embodiment
The present invention be applicable to needs that all secondary equipment of intelligent converting station suppliers are manufactured on its manufacturing reliably to the time secondary device on.Especially intelligent substation adopt the relay protection device of sampling Network Based and IEEE1588 network to the time during mode; merge cells adopts setting means of the present invention can improve the relaying protection system unfailing performance; avoid causing transformer station in idle interval unprotect ruuning situation because the network equipment causes the whole network relaying protection locking unusually.The application of the present invention in Intelligent substation merging unit can increase substantially the reliability level of relaying protection network Sampling techniques, promotes its application in intelligent substation.
Merge cells is transformer station process layer equipment, finishes the sampling task of the wall function that comprises relaying protection, each interval merge cells need to by to the time mode keep synchronous.Adopt IEEE1588 to the time mode carry out synchronous realization and be divided into two parts.A part be realize based on IEEE1588 to the time principle realization, this part be receive master clock to the time message the bottom function.In addition a part be according to receive to the time message function that this equipment clock frequency and phase place are revised realize, need in this section to take into full account to the time system reliability, the function of this part realizes using setting means of the present invention.As shown in Figure 1, the merge cells clock status is divided into two kinds of desynchronizing state and synchronous regimes according to requirement of the present invention, and synchronous regime is divided into the two kinds of finely divided states of following and keep time.Judgement and the switch condition between state of equipment state are realized according to setting means of the present invention.
Adopt the merge cells of setting means of the present invention, greatly improved IEEE1588 to the time application reliability of technology in intelligent substation, greatly improved the reliability of relaying protection network sampling.The present invention systematically solved the transformer station process layer use IEEE1588 to the time switch correction territory that runs in technology and the mechanical and electrical protection network Sampling techniques engineering application process cause unusually that merge cells time modulation causes the serious problems of relaying protection locking on a large scale.
The present invention realizes in merge cells, and engineering is used in what 220kV intelligent substation of Chaoyang, has carried out sufficient test and verified its performance in the dynamic simulation test of the full station scale of finishing when different parameters arranges.
1, to the time cycle be 1 second, merge cells setting means parameter is set to T1=2; T2=5; T3=5; T4=5; N1=2; N2=60; N3=2; N4=3.
Master clock normally moves, and merge cells powers on and showed afterwards in 62 seconds and enter synchronous regime.1 second 1 second duration of master clock time saltus step recovers afterwards, and merge cells is in synchronous regime always, and outgoing message and actual value are synchronous.1 second 3 seconds duration of master clock time saltus step recovers afterwards, and merge cells enters desynchronizing state and reenters synchronous regime after 62 seconds.In the time of master clock output variable, add amplitude less than 1 second stochastic variable, merge cells step-out after 5 minutes.The cancellation amplitude enters synchronous regime less than 1 second stochastic variable after 62 seconds in the time of master clock output variable.Add in the time of master clock output variable and cancel stochastic variable after amplitude is 4 minutes less than stochastic variable duration of 1 second, merge cells is in synchronous regime always.Add the saltus step that added in the cancellation stochastic variable after amplitude is 4 minutes less than stochastic variable duration of 1 second 1 second in the time of master clock output variable, merge cells enters desynchronizing state after 2 seconds, reenters synchronous regime after 62 seconds.
2, to the time cycle be 1 second, merge cells setting means parameter is set to T1=4; T2=125; T3=60; T4=125; N1=60; N2=120; N3=60; N4=20.
Master clock normally moves, and merge cells powers on and showed afterwards in 180 seconds and enter synchronous regime.1 second 59 seconds duration of master clock time saltus step recovers afterwards, and merge cells is in synchronous regime always, and outgoing message and actual value are synchronous.1 second 61 seconds duration of master clock time saltus step recovers afterwards, and merge cells enters desynchronizing state and reenters synchronous regime after 180 seconds.In the time of master clock output variable, add amplitude less than 1 second stochastic variable, merge cells step-out after 60 minutes.The cancellation amplitude enters synchronous regime less than 1 second stochastic variable after 180 seconds in the time of master clock output variable.Add in the time of master clock output variable and cancel stochastic variable after amplitude is 59 minutes less than stochastic variable duration of 1 second, merge cells is in synchronous regime always.Add the saltus step that added in the cancellation stochastic variable after amplitude is 59 minutes less than stochastic variable duration of 1 second 1 second in the time of master clock output variable, merge cells enters desynchronizing state after 125 seconds, reenters synchronous regime after 180 seconds.
3, to the time cycle be 1 second, merge cells setting means parameter is set to T1=3; T2=10; T3=10; T4=10; N1=10; N2=64; N3=10; N4=3.
Master clock normally moves, and merge cells powers on and showed afterwards in 74 seconds and enter synchronous regime.1 second 9 seconds duration of master clock time saltus step recovers afterwards, and merge cells is in synchronous regime always, and outgoing message and actual value are synchronous.1 second 11 seconds duration of master clock time saltus step recovers afterwards, and merge cells enters desynchronizing state and reenters synchronous regime after 74 seconds.In the time of master clock output variable, add amplitude less than 1 second stochastic variable, merge cells step-out after 10 minutes.The cancellation amplitude enters synchronous regime less than 1 second stochastic variable after 74 seconds in the time of master clock output variable.Add in the time of master clock output variable and cancel stochastic variable after amplitude is 9 minutes less than stochastic variable duration of 1 second, merge cells is in synchronous regime always.Add the saltus step that added in the cancellation stochastic variable after amplitude is 9 minutes less than stochastic variable duration of 1 second 1 second in the time of master clock output variable, merge cells enters desynchronizing state after 10 seconds, reenters synchronous regime after 74 seconds.
Evidence the parameter of method arrange carry out in the scope proving test all can improve the merge cells network to the time reliability.In conjunction with the specification requirement of test of many times and merge cells, relay protection device, the 3rd group of parameter of recommendation.
Claims (3)
1. the synchronous setting means of merge cells of using based on the adaptation relaying protection of IEEE1588, it is characterized in that merge cells three kinds to the time switch between state: desynchronizing state, synchronously following state, synchronously punctual state;
(1) switching condition of " desynchronizing state " to " synchronously following state " is: N continuous 1 (N1 ∈ [2,60]) individual to the time cycle, time service source time homogeneity error is less than T1 (T1 ∈ [2,4]) us, this moment, merge cells drew sequence number; N continuous 2 (N2 ∈ [60,120]) individual to the time cycle, time service source time homogeneity error is less than T1 (T1 ∈ [2,4]) us;
(2) " synchronously following state " to the switching condition of " synchronously punctual state " is: with time service source absolute time error greater than T2 (T2 ∈ [5,125]) us(1 time wrong to the time), the startup timer of keeping time;
(3) " synchronously punctual state " has 2 to the switching condition of " desynchronizing state ": punctual timer timing is more than or equal to T3 (T3=5,60) min; N continuous 3 (N3 ∈ [2,60]) frame message and merge cells absolute time poor greater than T2 (T2 ∈ [5,125]) us and long-time uniformity less than T1 (T1 ∈ [2,4]) us;
(4) " synchronously punctual state " to the switching condition of " synchronously following state " is: N continuous 4 (N4 ∈ [3,20]) the frame clock source to the time message and merge cells absolute time poor less than or equal to T4 (T4 ∈ [5,125]) the us long-time uniformity is less than T1 (T1 ∈ [2,4]) us, timer is closed in the then punctual timer zero clearing of merge cells;
(5) merge cells is in " synchronously following state ": with time service source absolute time error less than T5 (T5 ∈ [5,20]) us, by once also repeatedly the time is adjusted with the time service source synchronous.
2. the synchronous setting means of merge cells used of described adaptation relaying protection based on IEEE1588 according to claim 1 is characterized in that requiring to be 4us/10min in that merge cells is punctual, by following parameter the switching index is set when sample frequency is 4000 points/second:
(1) switching condition of " desynchronizing state " to " synchronously following state " is: N continuous 1=10 to the time cycle, time service source time homogeneity error is less than T1=3us, this moment, merge cells drew sequence number; N continuous 2=64 to the time cycle, time service source time homogeneity error is less than T1=3us;
(2) " synchronously following state " to the switching condition of " synchronously punctual state " is: with time service source absolute time error greater than T2=10us(1 time wrong to the time), the startup timer of keeping time;
(3) " synchronously punctual state " has 2 to the switching condition of " desynchronizing state ": punctual timer timing is more than or equal to T3=10min; N continuous 3=10 frame message and merge cells absolute time poor greater than T2=10us and long-time uniformity less than T1=3us;
(4) " synchronously punctual state " to the switching condition of " synchronous following state " is: N continuous 4=10 frame clock source to the time message and merge cells absolute time poor less than or equal to T4=10us and long-time uniformity less than T1=3us, timer is closed in the then punctual timer zero clearing of merge cells;
(5) merge cells is in " synchronously following state ": with time service source absolute time error less than T5=10us, by once also repeatedly the time is adjusted with the time service source synchronous.
3. the synchronous setting means of merge cells used of described adaptation relaying protection based on IEEE1588 according to claim 1 is characterized in that requiring to be 48us/2h in that merge cells is punctual, by following parameter the switching index is set when sample frequency is 4000 points/second:
(1) switching condition of " desynchronizing state " to " synchronously following state " is: N continuous 1=10 to the time cycle, time service source time homogeneity error is less than T1=3us, this moment, merge cells drew sequence number; N continuous 2=120 to the time cycle, time service source time homogeneity error is less than T1=3us;
(2) " synchronously following state " to the switching condition of " synchronously punctual state " is: with time service source absolute time error greater than T2=10us(1 time wrong to the time), the startup timer of keeping time;
(3) " synchronously punctual state " has 2 to the switching condition of " desynchronizing state ": punctual timer timing is more than or equal to T3=60min; N continuous 3=60 frame message and merge cells absolute time poor greater than T2=10us and long-time uniformity less than T1=3us;
(4) " synchronously punctual state " to the switching condition of " synchronous following state " is: N continuous 4=10 frame clock source to the time message and merge cells absolute time poor less than or equal to T4=40us and long-time uniformity less than T1=3us, timer is closed in the then punctual timer zero clearing of merge cells;
(5) merge cells is in " synchronously following state ": with time service source absolute time error less than T5=40us, by once also repeatedly the time is adjusted with the time service source synchronous.
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| CN201210542961.6A CN103036635B (en) | 2012-12-15 | 2012-12-15 | Based on the synchronous setting means of merge cells that the adaptation relaying protection of IEEE1588 is applied |
| AU2013359779A AU2013359779A1 (en) | 2012-12-15 | 2013-11-06 | IEEE1588-based merging unit synchronous timing method adapted to relay protection application |
| PCT/CN2013/001343 WO2014089898A1 (en) | 2012-12-15 | 2013-11-06 | Ieee1588-based merging unit synchronous timing method adapted to relay protection application |
| AU2013101745A AU2013101745A4 (en) | 2012-12-15 | 2013-11-06 | IEEE1588-based merging unit synchronous timing method adapted to relay protection application |
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| CN103281171A (en) * | 2013-05-10 | 2013-09-04 | 国家电网公司 | Multi-clock synchronization method of distributed type sampling value network |
| WO2014089898A1 (en) * | 2012-12-15 | 2014-06-19 | 辽宁省电力有限公司电力科学研究院 | Ieee1588-based merging unit synchronous timing method adapted to relay protection application |
| CN103970008A (en) * | 2014-05-06 | 2014-08-06 | 积成电子股份有限公司 | Timekeeping method based on crystal oscillator error compensation |
| CN104036308A (en) * | 2014-05-09 | 2014-09-10 | 中国南方电网有限责任公司电网技术研究中心 | Timing synchronization method used for electromechanical transient and electromagnetic transient simulation systems |
| CN104393974A (en) * | 2014-10-21 | 2015-03-04 | 杭州华三通信技术有限公司 | Autosave method of time hopping information, and equipment |
| CN105630066A (en) * | 2015-12-30 | 2016-06-01 | 工业和信息化部电子第五研究所 | Clock drift monitoring method and system for relay protection device controller |
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| CN113567852A (en) * | 2021-08-10 | 2021-10-29 | 武汉映瑞电力科技有限公司 | Device and method for testing time deviation and time keeping precision of relay protection device |
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| CN105069587B (en) * | 2015-09-08 | 2018-08-14 | 国网上海市电力公司 | A kind of relay protection check device based on mobile interchange |
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| CN116527542B (en) * | 2023-07-04 | 2023-10-13 | 云南电网有限责任公司 | Relay protection device clock out-of-step judging method aligned through fault points |
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| CN103036635B (en) * | 2012-12-15 | 2015-11-25 | 辽宁省电力有限公司电力科学研究院 | Based on the synchronous setting means of merge cells that the adaptation relaying protection of IEEE1588 is applied |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2014089898A1 (en) | 2014-06-19 |
| AU2013101745A4 (en) | 2016-03-03 |
| CN103036635B (en) | 2015-11-25 |
| AU2013359779A1 (en) | 2015-07-02 |
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