CN106341744A - System and method for testing synchronization feature of synchronous passive optical network - Google Patents
System and method for testing synchronization feature of synchronous passive optical network Download PDFInfo
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- CN106341744A CN106341744A CN201610983369.8A CN201610983369A CN106341744A CN 106341744 A CN106341744 A CN 106341744A CN 201610983369 A CN201610983369 A CN 201610983369A CN 106341744 A CN106341744 A CN 106341744A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
- H04B10/0773—Network aspects, e.g. central monitoring of transmission parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
Abstract
The invention discloses a system and method for testing the synchronization feature of a synchronous passive optical network, and belongs to the technical field of passive optical network. The system comprises a fault wave recording and network message analyzing device, a merging unit tester and an EPON system. The system and method can be used to the problem that the synchronization performance of systems of multi-end line differential protection, bus differential protection and distribution network differential protection cannot be tested in practical engineering process when the EPON serves as the communication network.
Description
Technical field
The invention belongs to passive optical network technique field.
Background technology
In digital transformer substation based on iec 61850 standard, the analog quantity such as electric current, voltage is by harvester temporally etc.
Interval sampling, and with sampled value (smv) message form at equal intervals real-time Transmission to corresponding protection supervisory equipment.In order to realize across
The bus differential at interval or transformer differential protection it is desirable to respectively realize synchronized sampling between the terminal of interval, conventional synchronous method
There are 1-pps pulse per second (PPS), irig-b code and ieee 1588 Precision Time Protocol etc..
For 1-pps pulse per second (PPS) or irig-b code, need to rely on outside gps or Big Dipper isochronon synchronization system.Due to gps
Or Big Dipper isochronon synchronization system needs to receive satellite-signal, its reliability need to rely on satellite, weather, signal reception sky
The links such as line, synchronous reception device.Traditional line differential protection device, considers for reliability, does not also adopt external sync
Mode, but the sample-synchronous between each device are realized with pingpong theory.
In order to realize, circuit multiterminal are differential, bus differential, distribution network systems differential protection extensibility, take into account synchronization simultaneously
The reliability of system, joint Nanjing Zhi Hui power technology company limited of Yunnan Power Grid Company have developed being applied to based on epon
The synchronous communication system of iec61850, this system can ensure that: in the case of no external synchronization clock, is connected to same epon and leads to
The synchronous error of each sampling terminal of letter system is less than 1 μ s；In the case of accessing external clock, it is not connected only to same epon
The synchronous error of each sampling terminal of communication system be less than 1 μ s, with external clock benchmark error again smaller than 1 μ s.
And described the same of each sampling pulse is tested direct based on the synchronous communication system of iec61850 of being applied to of epon
There is very big difficulty during step property.
Content of the invention
It is an object of the invention to provide a kind of system and method for test synchronization EPON synchronizing characteristicss, solve to adopt
Epon network is real as system Practical Projects such as the multi-point circuit differential protection of communication network, bus differential protection, distribution differential protections
Synchronicity test problem is cannot be carried out during applying.
For achieving the above object, the present invention employs the following technical solutions:
A kind of system of the synchronous EPON synchronizing characteristicss of test, including failure wave-recording and network message analytical equipment,
Combining unit tester and epon system, epon system includes epon main side olt terminal, epon passive optical splitters, several epon
Terminal onu unit and several analog acquisition unit, each epon terminal onu unit is all connected with an analog acquisition unit, institute
Analog acquisition unit is had to be all connected with combining unit tester, all epon terminal onu units are all connected with epon passive optical splitters,
Epon passive optical splitters connect epon main side olt terminal, and epon main side olt terminal connects combining unit tester, combining unit
Tester and epon main side olt terminal are all connected with failure wave-recording and network message analytical equipment.
The model apcs-3000 type fault recorded broadcast of described failure wave-recording and network message analytical equipment and network message divide
Analysis apparatus.
The model 7000a- relay-protection tester of described combining unit tester.
The model apcu-1000 intelligent acquisition control terminal of described analog acquisition unit.
With a kind of method of testing of the system support of described test synchronization EPON synchronizing characteristicss, walk including following
Rapid:
Step 1: the iec61850-9-2 message that combining unit tester produces is surveyed as test benchmark message, combining unit
Test benchmark message is sent to failure wave-recording and network message analytical equipment by examination instrument；
Step 2:epon system is that the iec61850-9-2 message that epon main side olt terminal produces is as tested by unit
Message, tested message is sent to failure wave-recording and network message analytical equipment by epon main side olt terminal；
Step 3: combining unit tester provides benchmark simulation amount for all analog acquisition units, described benchmark simulation amount is
Required reference voltage or reference current when collection and process analog signalses；All analog acquisition units are all connected by respective
Epon terminal onu unit connect epon network；
Step 4: when do not rely in epon system external synchronization clock do synchronicity test when, analog acquisition unit gather
The voltage-phase data of epon terminal onu unit each connecting and current phase data, all analog acquisition units all will be each
From the voltage-phase data collecting and current phase data, epon main side olt terminal, epon master are sent to by epon network
The all voltage-phase data receiving and described current phase data are processed on iec61850-9-2 message end olt terminal
Pass to failure wave-recording and network message analytical equipment；
Step 5: the iec61850-9-2 that epon main side olt terminal uploads analyzed by failure wave-recording and network message analytical equipment
Message, and store all voltage-phase data and all current phase data, failure wave-recording and network message analytical equipment pass through
Analyze the phase contrast of all voltage-phase data or the phase contrast of described current phase data, indirectly analyze outside not relying on
The clock synchronicity of epon system during portion's clock；
Step 6: when depend in epon system external synchronization clock do synchronicity test when, that is, combining unit tester to
Epon main side olt terminal provides outside pulse per second (PPS), the outside pulse per second (PPS) that combining unit tester is provided by epon system as
The clock reference of epon network；Using industrial frequency interference source, interference is applied to the outside pulse per second (PPS) merging the offer of unit testing instrument；
Step 7: the voltage-phase data of epon terminal onu unit and electric current phase that the collection of analog acquisition unit each connects
Position data, the voltage-phase each collecting data and current phase data are all passed through epon network by all analog acquisition units
It is sent to epon main side olt terminal, epon main side olt terminal is by all voltage-phase data receiving and described current phase
Data is processed into iec61850-9-2 message and is uploaded to failure wave-recording and network message analytical equipment；
Step 8: combining unit tester exports a digital signal according to the Phase synchronization of described benchmark simulation amount, and will
Described digital signal is uploaded to failure wave-recording and network message analytical equipment by the form of iec61850-9-2 message；
Step 9: the voltage-phase data that each analog acquisition unit is gathered by failure wave-recording and network message analytical equipment
Compared with the digital signal exporting with combining unit tester with current phase data, draw voltage phase difference and current phase
Difference, thus draw when the clock between the clock of epon system and reference clock is synchronous in the case of reference clock has external disturbance
Property.
It is an object of the invention to provide a kind of system and method for test synchronization EPON synchronizing characteristicss, solve to adopt
Epon network is real as system Practical Projects such as the multi-point circuit differential protection of communication network, bus differential protection, distribution differential protections
Synchronicity test problem is cannot be carried out during applying.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the synchronicity test result not relying on external synchronization clock in epon system；
Fig. 3 is the clock of epon system and described base when depending on the synchronicity of external synchronization clock to test in epon system
The nonsynchronous test result of quasi-synchro sampling pulse；
Fig. 4 is the clock of epon system and described base when depending on the synchronicity of external synchronization clock to test in epon system
The test result of quasi-synchro sampling impulsive synchronization；
In figure: failure wave-recording and network message analytical equipment 1, combining unit tester 2, epon main side olt terminal 3,
Epon passive optical splitters 4, epon terminal onu unit 5, analog acquisition unit 6.
Specific embodiment
Embodiment one:
A kind of system of test synchronization EPON synchronizing characteristicss as shown in Figure 1 it is characterised in that: include fault record
Involve network message analytical equipment 1, combining unit tester 2 and epon system, epon system include epon main side olt terminal 3,
Epon passive optical splitters 4, several epon terminal onu unit 5 and several analog acquisition unit 6, each epon terminal onu unit
5 are all connected with an analog acquisition unit, and all analog acquisition units are all connected with combining unit tester 2, all epon terminals onu
Unit 5 is all connected with epon passive optical splitters 4, and epon passive optical splitters 4 connect epon main side olt terminal 3, and epon main side olt is eventually
End 3 connection combining unit tester 2, combining unit tester 2 and epon main side olt terminal 3 are all connected with failure wave-recording and network
Message analyzing device 1.
The model apcs-3000 type fault recorded broadcast of described failure wave-recording and network message analytical equipment 1 and network message
Analytical equipment.
The model 7000a- relay-protection tester of described combining unit tester 2.
The model apcu-1000 intelligent acquisition control terminal of described analog acquisition unit.
Embodiment two:
Method of testing with a kind of system support of the test synchronization EPON synchronizing characteristicss described in embodiment one is
Realize on the basis of a kind of system of the test synchronization EPON synchronizing characteristicss implemented described in, walk including following
Rapid:
Step 1: the iec61850-9-2 message that combining unit tester 2 produces is as test benchmark message, combining unit
Test benchmark message is sent to failure wave-recording and network message analytical equipment 1 by tester 2；
Step 2:epon system is that the iec61850-9-2 message that epon main side olt terminal 3 produces is as conduct by unit
Tested message, tested message is sent to failure wave-recording and network message analytical equipment 1 by epon main side olt terminal 3；
Step 3: combining unit tester 2 provides benchmark simulation amount, described benchmark simulation amount for all analog acquisition units
For gathering and processing required reference voltage during analog signalses or reference current；All analog acquisition units are all by each connecting
The epon terminal onu unit 5 connecing connects epon network；
Step 4: when do not rely in epon system external synchronization clock do synchronicity test when, analog acquisition unit gather
The voltage-phase data of combining unit tester output and current phase data, all analog acquisition units are all each collected
Voltage-phase data and current phase data epon main side olt terminal 3 is sent to by epon network, epon main side olt is eventually
The all voltage-phase data receiving and described current phase data are processed into iec61850-9-2 message and are uploaded to event by end 3
Barrier record involves network message analytical equipment 1；
Step 5: the iec61850- that epon main side olt terminal 3 uploads analyzed by failure wave-recording and network message analytical equipment 1
9-2 message, and store all voltage-phase data and all current phase data, failure wave-recording and network message analytical equipment 1
By analyzing the phase contrast of all voltage-phase data or the phase contrast of described current phase data, indirectly analyze and be independent of
The clock synchronicity of epon system when external clock；
Step 6: when depending on external synchronization clock to do synchronicity test in epon system, i.e. combining unit tester 2
There is provided outside pulse per second (PPS) to epon main side olt terminal 3, the outside pulse per second (PPS) that combining unit tester 2 provides is made by epon system
Clock reference for epon network；Using industrial frequency interference source, interference is applied to the outside pulse per second (PPS) merging unit testing instrument 2 offer；
Step 7: the voltage-phase data of epon terminal onu unit 5 and electric current that the collection of analog acquisition unit each connects
Phase data, the voltage-phase each collecting data and current phase data are all passed through epon net by all analog acquisition units
Network is sent to epon main side olt terminal 3, and epon main side olt terminal 3 is by all voltage-phase data receiving and described electric current
Phase data is processed into iec61850-9-2 message and is uploaded to failure wave-recording and network message analytical equipment 1；
Step 8: combining unit tester 2 exports a digital signal according to the Phase synchronization of described benchmark simulation amount, and
Described digital signal is uploaded to failure wave-recording and network message analytical equipment 1 by the form of iec61850-9-2 message；
Step 9: the voltage-phase data that each analog acquisition unit is gathered by failure wave-recording and network message analytical equipment 1
Compared with the digital signal exporting with combining unit tester 2 with current phase data, draw voltage phase difference and current phase
Difference, thus draw when the clock between the clock of epon system and reference clock is synchronous in the case of reference clock has external disturbance
Property.
Embodiment three:
As shown in Fig. 2 when not relying on the synchronicity test of external synchronization clock in epon system, disconnecting combining unit and survey
The outside pulse per second (PPS) that examination instrument provides for epon main side olt terminal, all analog acquisition units are all by the voltage each collecting phase
Position data and current phase data are sent to epon main side olt terminal by epon network, and epon main side olt terminal will receive
All voltage-phase data and described current phase data be processed into iec61850-9-2 message and be uploaded to failure wave-recording and net
Network message analyzing device；Failure wave-recording and network message analytical equipment compare the iec61850- that each analog acquisition unit uploads
Sampled value phase waveform information between 9-2 message: wherein 101 voltage a, 101 voltage b and 101 voltage c are respectively any one
A phase voltage, b phase voltage and c phase voltage that analog acquisition unit is gathered, its corresponding oscillogram is " i "；103 voltage a, 103 electricity
Pressure b and 103 voltage c is respectively a phase voltage, b phase voltage and the c phase voltage that another analog acquisition unit is gathered, its ripple pair
Oscillogram is answered to be " ii ".
Reported by the iec61850-9-2 that failure wave-recording and network message analytical equipment upload to each analog acquisition unit
The phase place of literary composition carries out homophase phase place " nuclear phase " and compares, and records a homophase phase contrast every 60 seconds after restarting epon system；
Required according to sample-synchronous precision techniques in " analog input formula combining unit inspection criterion ", test result as shown in table 1
Understand, the sample-synchronous error of each analog acquisition unit difference analog quantity channel is less than 0.01 °, meets the phase of corresponding analog quantity
Position error class of accuracy 0.1 requires.Illustrate that epon system can not rely on external synchronization clock and carries for second protection control unit
For accurate Synchronous Sampling Pulse data.
Example IV:
As shown in figure 3, when depending on the synchronicity of external synchronization clock to test in epon system, disconnecting combining unit test
The outside pulse per second (PPS) that instrument provides for epon main side olt terminal, Synchronous Sampling Pulse on the basis of described outside pulse per second (PPS), failure wave-recording
And the sampled value phase waveform letter of network message analytical equipment iec61850-9-2 message that each analog acquisition unit is uploaded
The sampled value phase waveform information phase of the iec61850-9-2 message that breath is uploaded with combining unit tester compares: wherein 101 electricity
Pressure a, 101 voltage b and 101 voltage c are respectively a phase voltage, b phase voltage and the c phase that any one analog acquisition unit is gathered
Voltage, its corresponding oscillogram is " i "；A phase voltage, b phase voltage and c phase voltage that combining unit tester is gathered are as phase place
Benchmark, its corresponding oscillogram is " ii "；
By failure wave-recording and network message analytical equipment, the iec61850-9-2 that each analog acquisition unit uploads is reported
The sampled value phase waveform of the iec61850-9-2 message that the sampled value phase waveform information of literary composition is uploaded with combining unit tester
Information carries out homophase phase place " nuclear phase " and compares, and records a homophase phase contrast every 60 seconds after restarting epon system；As table 2
Shown test result, the angle between tested electric parameters phase place and reference phase is random value, its reason mainly due to
Phase contrast between epon system time pulse per second (PPS) and the internal pulse per second (PPS) of combining unit tester is random, leads to reference phase
With tested electric parameters phase contrast random distribution it is possible to analyze the clock of epon system and described reference synchronization sampling pulse
Asynchronous.
Embodiment five:
As shown in figure 4, when depending on the synchronicity of external synchronization clock to test in epon system, connecting combining unit test
The outside pulse per second (PPS) that instrument provides for epon main side olt terminal, Synchronous Sampling Pulse on the basis of described outside pulse per second (PPS), failure wave-recording
And the sampled value phase waveform letter of network message analytical equipment iec61850-9-2 message that each analog acquisition unit is uploaded
The sampled value phase waveform information phase of the iec61850-9-2 message that breath is uploaded with combining unit tester compares: wherein 101 electricity
Pressure a, 101 voltage b and 101 voltage c are respectively a phase voltage, b phase voltage and the c phase that any one analog acquisition unit is gathered
Voltage, its corresponding oscillogram is " i "；A phase voltage, b phase voltage and c phase voltage that combining unit tester is gathered are as phase place
Benchmark, its corresponding oscillogram is " ii "；
By failure wave-recording and network message analytical equipment, the iec61850-9-2 that each analog acquisition unit uploads is reported
The sampled value phase waveform of the iec61850-9-2 message that the sampled value phase waveform information of literary composition is uploaded with combining unit tester
Information carries out homophase phase place " nuclear phase " and compares, and records a homophase phase contrast every 60 seconds after restarting epon system；As table 3
Shown test result, the homophase phase contrast of tested electric parameters phase place and reference phase is less than 0.01 °, and " analog quantity is defeated for satisfaction
Enter formula combining unit inspection criterion " in sample-synchronous precision class of accuracy 0.1 will it is possible to analyze the clock of epon system with
Described reference synchronization sampling pulse is synchronous.
Table 1
Table 2
Table 3
Claims (5)
1. a kind of synchronous EPON synchronizing characteristicss of test system it is characterised in that: include failure wave-recording and network message
Analytical equipment (1), combining unit tester (2) and epon system, epon system includes epon main side olt terminal (3), epon no
Source beam splitter (4), several epon terminal onu unit (5) and several analog acquisition unit (6), each epon terminal onu unit
(5) it is all connected with an analog acquisition unit, all analog acquisition units are all connected with combining unit tester (2), all epon are eventually
End onu unit (5) is all connected with epon passive optical splitters (4), and epon passive optical splitters (4) connect epon main side olt terminal (3),
Epon main side olt terminal (3) connects combining unit tester (2), combining unit tester (2) and epon main side olt terminal (3)
It is all connected with failure wave-recording and network message analytical equipment (1).
2. as claimed in claim 1 a kind of synchronous EPON synchronizing characteristicss of test system it is characterised in that: described therefore
Barrier record involves the type fault recorded broadcast of model apcs-3000 and the network message analytical equipment of network message analytical equipment (1).
3. a kind of system of synchronous EPON synchronizing characteristicss of test as claimed in claim 1, is characterised by: described merging
The model 7000a- relay-protection tester of unit testing instrument (2).
4. a kind of system of synchronous EPON synchronizing characteristicss of test as claimed in claim 1, is characterised by: described simulation
The model apcu-1000 intelligent acquisition control terminal of collecting unit.
5. the method for testing with a kind of system support of the test synchronization EPON synchronizing characteristicss described in claim 1, its
It is characterised by: comprise the steps:
Step 1: the iec61850-9-2 message that combining unit tester (2) produces is surveyed as test benchmark message, combining unit
Test benchmark message is sent to failure wave-recording and network message analytical equipment (1) by examination instrument (2)；
Step 2:epon system is that the iec61850-9-2 message that epon main side olt terminal (3) produces is as quilt by unit
Observe and predict literary composition, tested message is sent to failure wave-recording and network message analytical equipment (1) by epon main side olt terminal (3)；
Step 3: combining unit tester (2) provides benchmark simulation amount for all analog acquisition units, described benchmark simulation amount is
Required reference voltage or reference current when collection and process analog signalses；All analog acquisition units are all connected by respective
Epon terminal onu unit (5) connect epon network；
Step 4: when do not rely in epon system external synchronization clock do synchronicity test when, analog acquisition unit collection merge
The voltage-phase data of unit testing instrument output and current phase data, all analog acquisition units are all by the electricity each collecting
Pressure phase data and current phase data are sent to epon main side olt terminal (3), epon main side olt terminal by epon network
(3) all voltage-phase data receiving and described current phase data are processed into iec61850-9-2 message and are uploaded to event
Barrier record involves network message analytical equipment (1)；
Step 5: the iec61850- that epon main side olt terminal (3) uploads analyzed by failure wave-recording and network message analytical equipment (1)
9-2 message, and store all voltage-phase data and all current phase data, failure wave-recording and network message analytical equipment
(1) pass through to analyze the phase contrast of all voltage-phase data or the phase contrast of described current phase data, indirectly analyze not
Depend on the clock synchronicity of epon system during external clock；
Step 6: when depend in epon system external synchronization clock do synchronicity test when, that is, combining unit tester (2) to
Epon main side olt terminal (3) provides outside pulse per second (PPS), the outside pulse per second (PPS) that combining unit tester (2) is provided by epon system
Clock reference as epon network；Using industrial frequency interference source, the outside pulse per second (PPS) that merging unit testing instrument (2) provides is applied
Interference；
Step 7: the voltage-phase data of epon terminal onu unit (5) and electric current phase that the collection of analog acquisition unit each connects
Position data, the voltage-phase each collecting data and current phase data are all passed through epon network by all analog acquisition units
It is sent to epon main side olt terminal (3), epon main side olt terminal (3) is by all voltage-phase data receiving and described electricity
Stream phase data is processed into iec61850-9-2 message and is uploaded to failure wave-recording and network message analytical equipment (1)；
Step 8: combining unit tester (2) exports a digital signal according to the Phase synchronization of described benchmark simulation amount, and will
Described digital signal is uploaded to failure wave-recording and network message analytical equipment (1) by the form of iec61850-9-2 message；
Step 9: voltage-phase data that each analog acquisition unit is gathered by failure wave-recording and network message analytical equipment (1) and
Compared with the digital signal that current phase data is exported with combining unit tester (2), draw voltage phase difference and current phase
Difference, thus draw when the clock between the clock of epon system and reference clock is synchronous in the case of reference clock has external disturbance
Property.
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| CN112583475A (en) * | 2019-09-27 | 2021-03-30 | 华为技术有限公司 | Test method, optical line terminal and optical network terminal |
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