CN107884735A - Source tracing method based on light digital quantity transmission of quantity value - Google Patents
Source tracing method based on light digital quantity transmission of quantity value Download PDFInfo
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- CN107884735A CN107884735A CN201711035100.8A CN201711035100A CN107884735A CN 107884735 A CN107884735 A CN 107884735A CN 201711035100 A CN201711035100 A CN 201711035100A CN 107884735 A CN107884735 A CN 107884735A
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- light
- source
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- data processing
- processing module
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
Abstract
The present invention discloses a kind of source tracing method based on light digital quantity transmission of quantity value, including analog simulation module simulation different signal source is transferred to light Digital source data processing module；The light data signal obtained after processing is inputted conversion unit of protocol by light Digital source data processing module, produces the semaphore for meeting national standard；Light data signal after conversion unit of protocol is changed inputs standard light numeral table data processing module and treats light-metering numeral table respectively；Standard light numeral table data processing module is calculated by value error calculating module and treats the value error of light-metering numeral table output, eventually through the reliability for comparing to determine light digital quantity transmission of quantity value and tracing to the source with national standard error parameter.The present invention solves the problems, such as the magnitude tracing of digital protective relay test device, digital quantity tracing technology is made breakthroughs from theory and practice.
Description
Technical field
The present invention relates to light digital signal processing technique field, and in particular to a kind of tracing back based on light digital quantity transmission of quantity value
Source method.
Background technology
Light Digital Signal Processing is to information such as its amplitude, phases by some optical signal by other optical signal
Changed and controlled.Light Digital Signal Processing needs to include many links, such as amplifies, caches, signal regeneration.Will be complete
Optical signal processing technology is effectively applied on communication network, can promote the raising of network transmission speed, broadband utilization rate.
With accelerating development for state grid corporation of smart grid strategy, the construction of intelligent substation quickly propels, with
Digital relay protection based on IEC61850 is widely applied with automatic safety device in Practical Project, and relay protection is surveyed
Examination technology proposes new challenge.Can not be right by analog output and the traditional relay protection tester based on switching value inspection
Test is carried out using the digital relay protection of IEC61850 technologies, each relay-protection tester manufacturer releases be based on one after another
The test device for relay protection of IEC61850 digitizing techniques, but because IEC61850 technologies apply complex, new production itself
The product construction cycle is shorter, practical engineering application experience is less and the reason such as unified technical standard and specification shortage, these surveys
Problems be present in examination instrument, some devices in even applying at the scene many basic tests can not all complete.Further, since work
Make principle difference, the function and performance difference of various type products are also larger.These generate larger to live practical application
Influence, the technical requirements of relay protection test can not be met.
Therefore, there is an urgent need to carry out the coherent detection of digital protective relay tester, specification digital protective relay is surveyed
The correlation function of instrument is tried, its overall performance is lifted, better way and means is provided for relay protection test.
For digital protective relay test device, the current country there is no application specific standard and specification.Due to lacking unification
Technical specification and technical conditions, the function and performance difference of various type products are larger, live practical application are generated larger
Influence, therefore there is an urgent need to formulate unified technical conditions and technical specification, specification and the globality for improving digital tester
Energy.
Unlike traditional relay protection tester, the output of digital protective relay tester is digital quantity, logarithm
The problem of tracing to the source of word amount does not solve also.
Comprehensive technology status at home and abroad, the digital protective relay test device of each manufacturing enterprise's production, spread in performance is not
Together；The calibration equipment that each grid company gauge check mechanism uses, its amount, which passes, to be unified.Therefore, intelligent substation equipment
Operational reliability can not be protected.In order to adapt to the requirement that the whole station of intelligent substation is implemented, it is necessary in new technical conditions
On the basis of research meet the tracing technology of digital protective relay test device feature.
The content of the invention
To solve the above problems, the present invention provides a kind of source tracing method based on light digital quantity transmission of quantity value, according to light number
The characteristics of word amount, establish corresponding light digital quantity and pass system to verify the process of tracing to the source of light digital quantity, to ensure light digital quantity instrument
The reliability and security that device equipment is traced to the source.
To achieve the above object, the technical scheme is that：A kind of source tracing method based on light digital quantity transmission of quantity value,
Including：
Analog simulation module simulation different signal source is transferred to light Digital source data processing module；
The light data signal obtained after processing is inputted conversion unit of protocol by light Digital source data processing module, and generation meets country
The semaphore of standard；
Light data signal after conversion unit of protocol is changed inputs standard light numeral table data processing module and treats light-metering respectively
Digital table；
Standard light numeral table data processing module is calculated by value error calculating module and treats that the value of light-metering numeral table output misses
Difference, eventually through the reliability for comparing to determine light digital quantity transmission of quantity value and tracing to the source with national standard error parameter.
Further, the signal source includes analog quantity, switching value and synchronizing signal.
Further, the smooth Digital source data processing module supports clock synchronization input and output, real under clock control
Existing analog quantity sampling, support the demarcation of Ethernet markers, FT3 transmitting-receivings.
Further, the standard light numeral table data processing module supports the point-to-point transmission of Ethernet, FT3 transmitting-receivings.
Compared with prior art, the present invention has beneficial effect：The value for solving digital protective relay test device traces back
Source problem, digital quantity tracing technology is made breakthroughs from theory and practice, realize to digital relay-protection tester
Calibration Deng intelligent substation instrument and equipment, detect and trace to the source.
Brief description of the drawings
Fig. 1 is the source tracing method schematic flow sheet of the invention based on light digital quantity transmission of quantity value；
Fig. 2 is one embodiment of the invention light digital source Source Tracing structure chart；
Fig. 3 is one embodiment of the invention light numeral table Source Tracing structure chart；
Fig. 4 is one embodiment of the invention goose markers Source Tracing structure charts；
Fig. 5 is Calculation of Sensitivity schematic diagram of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention will be further described.
As shown in figure 1, a kind of source tracing method based on light digital quantity transmission of quantity value, including：
Analog simulation module simulation different signal source is transferred to light Digital source data processing module；
The light data signal obtained after processing is inputted conversion unit of protocol by light Digital source data processing module, and generation meets country
The semaphore of standard；
Light data signal after conversion unit of protocol is changed inputs standard light numeral table data processing module and treats light-metering respectively
Digital table；
Standard light numeral table data processing module is calculated by value error calculating module and treats that the value of light-metering numeral table output misses
Difference, eventually through the reliability for comparing to determine light digital quantity transmission of quantity value and tracing to the source with national standard error parameter.
In an embodiment of the present invention, light digital source includes the light digital quantity values such as transient state source, synchronous input and output, FT3
Function is transmitted, light digital source Source Tracing structure chart is as shown in Fig. 2 analog simulation module provides analog output, 3 road voltage electricity
Stream, supports transient-wave output, 3 phase currents can Parallel opertation, when being tested due to 20 times of transient high-currents, based on 1A rated values
Calculate, maximum instantaneous peak value is close to 60A, therefore current temporary state output instantaneous peak value presses 20A（Direct current）Calculate, the most long output time of transient state
<2 seconds, 10A, 120V designs were pressed in stable state output.Master control borad realizes that major function, including clock synchronization input and output, AD are sampled, opened
Pass amount input and output, the demarcation of Ethernet markers, FT3 transmitting-receivings etc..3 road synchronism outputs are set, and 2 tunnel phototiming mouths, 1 road electricity is synchronously
Mouthful, the synchronizing signal type of output is consistent, can support B codes, PPS, and B code checks position be can be set, and PPS rising edges trailing edge can be set
Put；2 tunnels are synchronously inputted, and main synchronous input port is used for use synchronous with external clock, and another synchronous mouth is done for receiving Mu clocks
Pair when it is punctual use, master control borad supports test two-way clock error originated from input, i.e., pair when time keeping error.3 are realized under clock control
Road voltage x current AD analog quantitys sampling, sampled data include sampling time delay, 6 tunnel sampled values, can use more ASDU（Such as 8ASDU）
Be transmitted, low required to transmission delay, less than 100mS, i.e., master control borad within the one whole second of PPS triggering moments by between 1/4k seconds etc.
Every carrying out AD samplings, and by sampled value according to being sent to Ethernet after protocol packing.For the demarcation of delay, ensureing that sampling can
In the case of leaning on, demarcated by theoretical value, such as 0 serial number 0,1 serial number 250us, 3999 serial number 3999*250us.
In an embodiment of the present invention, light numeral table is traced to the source and detection is integrated on a complete set of equipments, there is provided by upper one
The method traced to the source of level and interface, light numeral table Source Tracing structure chart as shown in figure 3, under clock control it is point-to-point to two-way with
Too network data carries out timestamp demarcation and is forwarded to communication Ethernet mouth, and markers resolution ratio is 10nS, and stated accuracy is better than
100nS, realize the point-to-point Ethernet in 2 tunnels while carry out the demarcation of data receiver markers and forward, the point-to-point maximum Ethernet of single channel
Load>20Mbps；The point-to-point Ethernet sending function in 1 tunnel is realized simultaneously, interval combining unit can be carried out to emulate bus Mu's
Test；Timestamp demarcation is carried out to FT3 input datas under clock control and is forwarded to communication Ethernet mouth, markers resolution ratio is
10nS, stated accuracy are better than 100nS, can increase a timer, record markers.
In an embodiment of the present invention, the detection according to light digital quantity time response, analyze goose markers and its trace to the source,
Realize calibration, the detection to the intelligent substation instrument and equipment goose modules including digital protective relay tester etc.
With trace to the source.Goose markers Source Tracing gives light digital quantity real time calibration as shown in figure 4, digital relay protection tester exports PPS
Device, the PPS signal of light digital quantity real time calibration device tracking outside input adjust oneself clock and export PPS, digital oscillography
The rising time that device or chronometer time synthesis analyzer record two PPS is poor, is integrated by digital oscilloscope or chronometer time
The test result of analyzer, checking light digital quantity real time calibration device pair when the degree of accuracy, it is real-time to light digital quantity so as to realize
The markers of calibrating installation is traced to the source function.
In an embodiment of the present invention, the intelligent substation instrument and equipment including digital protective relay tester etc. is passed through
The light-receiving and light transfer characteristic of optical port module are detected, and realize sensitivity Source Tracing by the following method：
Light digital received sensitivity is the photosensitive required minimum optical power under conditions of regulation bit error rate requirement；Therefore it is all
Sensitivity parameter should all be represented using the input of light-receiving as reference point；
It is assumed that either metrorrhagia noise or thermal noise, its probability density distribution all Gaussian distributeds, as shown in figure 5, then sentencing
Certainly overall noise probability density of point when being " 0 " code is：
P0 =
Mean square noise when wherein x is " 0 " code, i.e. N0=；
Instantaneous signal voltage when V0 is " 0 " code.
When light pulse is " 0 " code, the luminous power of light pulse is 0, and the output instantaneous voltage of photoreceiver is also 0, in addition
It is similar with the expression formula of thermal noise, output instantaneous signal voltage V1 conversions are indicated to the input of light-receiving；Then V1
Implication change, turn into the light energy Em of " 1 " code light pulse, expression formula is changed into：
Em=
Q is quality factor, i.e. the light energy Em of " 1 " code light pulse and total root mean square noise power ratio.
Radical sign is eliminated, and brings N1 and N0 expression formula into, after arrangement：
-2Em+()-4()=0
Then in general, the general expression of optical receiver sensitivity is：
Pr=BEm=B(E1+2)。
In an embodiment of the present invention, goose transmission of quantity value source tracing method includes：
Analog simulation module simulation creates goose channel datas, creates goose message transmissions and handles mould to light Digital source data
Block, while input light digital synchronous is believed；
Light Digital source data processing module handles goose messages and synchronizing signal so that goose markers and synchronizing signal clock one
Cause；
Goose messages are input to conversion unit of protocol and carry out protocol verification, verify goose uniformity；
Synchronizing signal is inputted standard light numeral table data processing module, goose messages are input to by optical port treats light-metering numeral
Table；
The goose semaphores and synchronizing signal amount of light numeral table data processing mould are input to magnitude calculation module, calculate goose
Markers precision, standard is compared according to result of calculation, judgement is traced to the source reliable.
The foregoing is only presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, it should all belong to the covering scope of the present invention.
Claims (4)
- A kind of 1. source tracing method based on light digital quantity transmission of quantity value, it is characterised in that including：Analog simulation module simulation different signal source is transferred to light Digital source data processing module；The light data signal obtained after processing is inputted conversion unit of protocol by light Digital source data processing module, and generation meets country The semaphore of standard；Light data signal after conversion unit of protocol is changed inputs standard light numeral table data processing module and treats light-metering respectively Digital table；Standard light numeral table data processing module is calculated by value error calculating module and treats that the value of light-metering numeral table output misses Difference, eventually through the reliability for comparing to determine light digital quantity transmission of quantity value and tracing to the source with national standard error parameter.
- 2. the source tracing method according to claim 1 based on light digital quantity transmission of quantity value, it is characterised in that the signal source Including analog quantity, switching value and synchronizing signal.
- 3. the source tracing method according to claim 1 based on light digital quantity transmission of quantity value, it is characterised in that the light numeral Source data processing module supports clock synchronization input and output, realizes that analog quantity samples under clock control, supports Ethernet markers Demarcation, FT3 transmitting-receivings.
- 4. the source tracing method according to claim 1 based on light digital quantity transmission of quantity value, it is characterised in that the standard light Digital table data processing module supports the point-to-point transmission of Ethernet, FT3 transmitting-receivings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711035100.8A CN107884735A (en) | 2017-10-30 | 2017-10-30 | Source tracing method based on light digital quantity transmission of quantity value |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711035100.8A CN107884735A (en) | 2017-10-30 | 2017-10-30 | Source tracing method based on light digital quantity transmission of quantity value |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558577A (en) * | 2013-10-29 | 2014-02-05 | 国家电网公司 | Double-input-type digital standard energy meter, detecting system and quantity value source tracing system |
| CN104914405A (en) * | 2015-06-26 | 2015-09-16 | 国家电网公司 | Detection method and device |
| CN105203986A (en) * | 2015-09-16 | 2015-12-30 | 国家电网公司 | Digital power source tracing method and system |
| CN105548947A (en) * | 2016-01-28 | 2016-05-04 | 云南电网有限责任公司电力科学研究院 | Method and system of synchronization traceability of digitalization electric energy meter |
-
2017
- 2017-10-30 CN CN201711035100.8A patent/CN107884735A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558577A (en) * | 2013-10-29 | 2014-02-05 | 国家电网公司 | Double-input-type digital standard energy meter, detecting system and quantity value source tracing system |
| CN104914405A (en) * | 2015-06-26 | 2015-09-16 | 国家电网公司 | Detection method and device |
| CN105203986A (en) * | 2015-09-16 | 2015-12-30 | 国家电网公司 | Digital power source tracing method and system |
| CN105548947A (en) * | 2016-01-28 | 2016-05-04 | 云南电网有限责任公司电力科学研究院 | Method and system of synchronization traceability of digitalization electric energy meter |
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