CN102944861A - Electronic transformer calibrator calibration device and method based on digital source - Google Patents
Electronic transformer calibrator calibration device and method based on digital source Download PDFInfo
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- CN102944861A CN102944861A CN201210436816XA CN201210436816A CN102944861A CN 102944861 A CN102944861 A CN 102944861A CN 201210436816X A CN201210436816X A CN 201210436816XA CN 201210436816 A CN201210436816 A CN 201210436816A CN 102944861 A CN102944861 A CN 102944861A
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- 238000004164 analytical calibration Methods 0.000 claims description 26
- 238000004364 calculation method Methods 0.000 claims description 16
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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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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Abstract
The invention provides an electronic transformer calibrator calibration device and an electronic transformer calibrator calibration method based on a digital source. As a calibration measurement system, a digital source and standard synchronous pulse source combined method is adopted, standard IEC61850 data frames are generated by adopting a mathematical method, time delay does not exist between the standard IEC61850 data frames and corresponding analog output signals in another loop, and ratio difference and angular difference are superposed by adopting a digital method. The electronic transformer calibrator calibration device and the electronic transformer calibrator calibration method based on the digital source have the advantages that since the standard IEC61850 data frames are generated by adopting the mathematical method, the standard IEC61850 data frames can be obtained without conducting analog sampling and the time delay does not exist between the standard IEC61850 data frames and the corresponding analog output signals in another loop; and since the ratio difference and the angular difference are superposed by adopting the digital method, the accuracy is high and the tracing process is simple.
Description
Technical field
The present invention relates to a kind of electronic transducer calibration instrument calibration equipment and method based on digital source, belong to calibration, calibrating and detection field to electronic transducer calibration instrument.
Background technology
Electronic transducer calibration instrument is the major equipment of verification electronic mutual inductor, and lot of domestic and international scholar has carried out research to it, such as patent " field calibrator for electronic transformer ".But the method for calibration correlative study for electronic transducer calibration instrument is fewer.Patent " based on the calibrating apparatus for electronic transducer calibration instrument of alternating current bridge balance principle " has proposed a kind of electronic transducer calibration instrument calibration equipment, at first produce the two-way simulating signal by alternating current bridge, differ ratio and the angular difference of known standard between this two-way simulating signal, then adopt standard sampling device that one tunnel simulating signal is wherein carried out sampling with high precision, by conversion unit of protocol sampled value is formed Frame according to the IEC61850-9-1 standard again, send to tested electronic transducer calibration instrument by Ethernet.Another road simulating signal just directly sends to tested electronic transducer calibration instrument.The mode that adds like this numeral sampling by alternating current bridge, obtained a road sign quasi-analog signal, the accurate IEC61850 Frame of one road sign, and two paths of signals differs ratio and the angular difference of known standard, tested electronic transducer calibration instrument receives the calculating of sampling of this two paths of signals, its error that obtains and two paths of signals is differed the ratio of known standard and angular difference compare and just can obtain the error of tested electronic transducer calibration instrument.
But under this mode, owing to need to finish first sampling, the mode that sends of assembled data frame again, so the time-delay that the standard IEC 61850 Frames analog output signal corresponding with other a tunnel that sends compared is larger, it is very large with respect to the absolute time-delay of primary current to be equivalent to standard IEC 61850 Frames, can cause the tested electronic transducer calibration instrument can't be synchronous, can't calibrate for error.
Patent " a kind of calibrating test device of electronic transducer calibration instrument " is sampled to realize owing to also being based on standard A/D, is also had the standard IEC 61850 Frames problem excessive with respect to the absolute time-delay of primary current.
In view of this, the invention provides a kind of electronic transducer calibration instrument calibration equipment and method based on digital source, to address the above problem.
Summary of the invention
The objective of the invention is, in order to overcome the deficiencies in the prior art, thereby a kind of electronic transducer calibration instrument calibration equipment and method based on digital source, as a calibration measurement system, the mode that it has adopted digital source and standard sync souce to combine, adopt mathematical formulae to produce the IEC61850 Frame of standard, nothing is delayed time between the analog output signal corresponding with other a tunnel, and adopts numerical approach stack ratio and angular difference.
The technical solution adopted in the present invention is: a kind of electronic transducer calibration instrument calibration equipment based on digital source, it is characterized in that: comprise man-machine interaction unit, the synchro source control module, the current/voltage output module, the synchronizing pulse output module, numeral output control unit and digital output unit, during calibrated electronic formula mutual-inductor tester, the laboratory technician arranges normalized current/voltage and ratio and the angular difference that needs output by man-machine interaction unit, the synchro source control module is according to the normalized current of setting/magnitude of voltage control current/voltage output module output voltage and electric current, the synchro source control module is also controlled synchronizing pulse output module output sync pulse signal simultaneously, its rising edge of a pulse and current/voltage output module zero crossing are synchronous, and its frequency is 1Hz; The numeral output control unit is according to normalized current/voltage and ratio and the angular difference set, by calculating standard IEC 61850 Frames, and the output of control figure output unit.
Aforesaid electronic transducer calibration instrument calibration equipment based on digital source is characterized in that tested electronic transducer calibration instrument is provided with analog input unit, synchronizing pulse receiver module, IEC61850 signal receiving unit, error calculation unit; Normalized current/the voltage signal of the current/voltage output module output in the electronic transducer calibration instrument calibration equipment is connected to the analog input unit in the tested electronic transducer calibration instrument; The synchronous pulse per second (PPS) of synchronizing pulse output module output exports the synchronizing pulse receiver module of tested electronic transducer calibration instrument to; Standard IEC 61850 Frames of numeral output unit output export the IEC61850 signal receiving unit of tested electronic transducer calibration instrument to.
Aforesaid electronic transducer calibration instrument calibration equipment based on digital source is characterized in that, the normalized current scope of described current/voltage output module output is 0-6A, and the normalized current scope is 0-120V, and class of accuracy is 0.01 grade; Phase differential is no more than 0.3 minute between the normalized current of its rising edge of pps pulse per second signal of synchronizing pulse output module output and the output of current/voltage output module/voltage signal zero crossing.
Aforesaid electronic transducer calibration instrument calibration equipment based on digital source, it is characterized in that, described digital output control unit passes through mathematical formulae, according to the normalized current/voltage signal that sets and ratio and angle difference signal, sample calculation goes out the value of each sampled point, then dresses up standard IEC 61850 Frames according to the IEC61850-9-1/2 protocol groups.
The present invention also provides a kind of electronic transducer calibration instrument method of calibration based on digital source, adopts aforesaid electronic transducer calibration instrument calibration equipment, it is characterized in that: comprise the steps:
1) at first by man-machine interaction unit following 4 parameters are set:
1) normalized current/voltage effective value
2) standard error of this electronic transducer calibration instrument calibration equipment output: ratio
And angular difference
3) sample frequency corresponding to output IEC61850 Frame
2) then the synchro source control module is controlled current/voltage output module outputting standard current/voltage signal according to correlation parameter
, wherein
t=0 is the synchronizing pulse output module output pulse per second (PPS) moment corresponding to rising edge constantly, when
t=0 o'clock,
=0;
fBe the frequency of normalized current/voltage signal, its ratings is 50Hz;
3) digital output control unit is according to correlation parameter simultaneously, and the value that calculates each sample point according to formula is:
, wherein
NBe the sequence number value of sampled point, its value since 0 to
-1 finishes; The circulation that so goes round and begins again, cycle period is 1s; The numeral output control unit is respectively sampled after the point value according to formula, according to the IEC61850 data protocol it is assembled into IEC61850 Frame and control figure output unit outputting standard IEC61850 Frame; Numeral output unit outputting standard IEC61850 Frame is spaced apart
, its shake is no more than 10
4) normalized current/voltage signal of the analog input unit received current/voltage in the tested electronic transducer calibration instrument/output module output, the synchronizing pulse receiver module receives the pulse per second (PPS) synchronizing signal of synchronizing pulse output module; Triggering Imitating input block at the synchronizing pulse receiver module carries out the A/D sampling to normalized current/voltage signal, and the result is outputed in the error calculation unit; Meanwhile the IEC61850 signal receiving unit in the tested electronic transducer calibration instrument receives standard IEC 61850 Frames of digital output unit output, and resolves, and analysis result is sent to error calculation unit; The signal that error calculation unit sends over according to simulation output unit and IEC61850 signal receiving unit carries out error and calculates, obtain ratio and angular difference, the standard error of this electronic transducer calibration instrument calibration equipment output that itself and man-machine interaction unit are arranged: ratio
And angular difference
Compare and to obtain the error of tested electronic transducer calibration instrument.
The invention has the beneficial effects as follows: 1) adopt mathematical method to produce standard IEC 61850 Frames, need not obtain by analog sampling, nothing time-delay between the analog output signal corresponding with other a tunnel; 2) adopt numerical approach stack ratio and angular difference, accuracy is high, and it is simple to trace to the source.
Description of drawings
Fig. 1 is embodiment of the invention principle of work block diagram.
Fig. 2 is synchronizing pulse and electric current (voltage) oscillogram.
Embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within the listed claims limited range of the application.
The description of symbols of Fig. 1: 1-electronic transducer calibration instrument calibration equipment, 2-man-machine interaction unit, 3-synchro source control module, 4-current/voltage output module, 5-synchronizing pulse output module, 6-numeral output control unit, 7-numeral output unit, the tested electronic transducer calibration instrument of 8-, 9-analog input unit, 10-synchronizing pulse receiver module, 11-IEC61850 signal receiving unit, 12-error calculation unit.
As shown in Figure 1, the embodiment of the invention comprises electronic transducer calibration instrument calibration equipment 1, man-machine interaction unit 2, synchro source control module 3, current/voltage output module 4, synchronizing pulse output module 5, digital output control unit 6, digital output unit 7, tested electronic transducer calibration instrument 8, analog input unit 9, synchronizing pulse receiver module 10, IEC61850 signal receiving unit 11, error calculation unit 12.
For the calibration of electronic transducer calibration instrument, as shown in Figure 1, the normalized current/voltage signal of current/voltage output module 4 outputs in the electronic transducer calibration instrument calibration equipment 1 is connected to the analog input unit 9 in the tested electronic transducer calibration instrument 8; The synchronous pulse per second (PPS) of synchronizing pulse output module 5 outputs exports synchronizing pulse receiver module 10 to; Standard IEC 61850 Frames of numeral output unit 7 outputs export the IEC61850 signal receiving unit to.
The normalized current scope of current/voltage output module 4 outputs wherein is 0-6A, and the normalized current scope is 0-120V, and class of accuracy is 0.01 grade; Phase differential is no more than 0.3 minute between the normalized current of its rising edge of pps pulse per second signal of synchronizing pulse output module 5 outputs and 4 outputs of current/voltage output module/voltage signal zero crossing;
Digital output control unit wherein is by mathematical formulae, and according to the normalized current/voltage signal that sets and ratio angle difference signal, sample calculation goes out the value of each sampled point, then dresses up standard IEC 61850 Frames according to the IEC61850-9-1/2 protocol groups.
During implementation, at first by man-machine interaction unit 2 relevant following 4 parameters are set:
4) normalized current (voltage) effective value
5) standard error (ratio of this electronic transducer calibration instrument calibration equipment output
And angular difference
);
6) sample frequency corresponding to output IEC61850 Frame
Then synchro source control module 3 is according to correlation parameter control current/voltage output module 4 outputting standard current/voltage signals
, wherein
t=0 constantly is the 5 output pulse per second (PPS) moment corresponding to rising edge of synchronizing pulse output module, because the pulse per second (PPS) rising edge is constantly consistent with normalized current/voltage over zero synchronously, then works as
t=0 o'clock,
=0.
fBe the frequency of normalized current/voltage signal, its ratings is 50Hz.
Simultaneously digital output control unit 6 is according to correlation parameter, and the value that calculates each sample point according to formula is:
, wherein
NBe the sequence number value of sampled point, its value since 0 to
-1 finishes.As
=4000Hz, then the N value from 0 to 3999, and then since 0, the circulation that so goes round and begins again, cycle period is 1s.Numeral output control unit 6 is respectively sampled after the point value according to formula, according to the IEC61850 data protocol it is assembled into IEC61850 Frame and control figure output unit 7 outputting standard IEC61850 Frames.Numeral output unit 7 outputting standard IEC61850 Frames are spaced apart
, its shake is no more than 10
Normalized current/the voltage signal of the analog input unit received current/voltage in the tested electronic transducer calibration instrument 8/output module 4 outputs, synchronizing pulse receiver module 10 receives the pulse per second (PPS) synchronizing signal of synchronizing pulse output module.9 pairs of normalized current/voltage signals of triggering Imitating input block at synchronizing pulse receiver module 10 carry out the A/D sampling, and the result is outputed in the error calculation unit 12.Meanwhile the IEC61850 signal receiving unit in the tested electronic transducer calibration instrument 8 11 receives standard IEC 61850 Frames of digital output unit 7 outputs, and resolves, and analysis result is sent to error calculation unit 12.The signal that error calculation unit 12 sends over according to simulation output unit 9 and IEC61850 signal receiving unit 11 carries out error and calculates, obtain ratio and angular difference, the standard error (ratio of this electronic transducer calibration instrument calibration equipment output that itself and man-machine interaction unit 2 arranged
And angular difference
) comparing to obtain the error of tested electronic transducer calibration instrument.
Be embodiments of the invention only below, be not limited to the present invention, therefore within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (5)
1. electronic transducer calibration instrument calibration equipment based on digital source, it is characterized in that: comprise man-machine interaction unit, the synchro source control module, the current/voltage output module, the synchronizing pulse output module, numeral output control unit and digital output unit, during calibrated electronic formula mutual-inductor tester, the laboratory technician arranges normalized current/voltage and ratio and the angular difference that needs output by man-machine interaction unit, the synchro source control module is according to the normalized current of setting/magnitude of voltage control current/voltage output module output voltage and electric current, the synchro source control module is also controlled synchronizing pulse output module output sync pulse signal simultaneously, its rising edge of a pulse and current/voltage output module zero crossing are synchronous, and its frequency is 1Hz; The numeral output control unit is according to normalized current/voltage and ratio and the angular difference set, by calculating standard IEC 61850 Frames, and the output of control figure output unit.
2. the electronic transducer calibration instrument calibration equipment based on digital source according to claim 1, it is characterized in that tested electronic transducer calibration instrument is provided with analog input unit, synchronizing pulse receiver module, IEC61850 signal receiving unit, error calculation unit; Normalized current/the voltage signal of the current/voltage output module output in the electronic transducer calibration instrument calibration equipment is connected to the analog input unit in the tested electronic transducer calibration instrument; The synchronous pulse per second (PPS) of synchronizing pulse output module output exports the synchronizing pulse receiver module of tested electronic transducer calibration instrument to; Standard IEC 61850 Frames of numeral output unit output export the IEC61850 signal receiving unit of tested electronic transducer calibration instrument to.
3. the electronic transducer calibration instrument calibration equipment based on digital source according to claim 1 is characterized in that, the normalized current scope of described current/voltage output module output is 0-6A, and the normalized current scope is 0-120V, and class of accuracy is 0.01 grade; Phase differential is no more than 0.3 minute between the normalized current of its rising edge of pps pulse per second signal of synchronizing pulse output module output and the output of current/voltage output module/voltage signal zero crossing.
4. the electronic transducer calibration instrument calibration equipment based on digital source according to claim 1, it is characterized in that, described digital output control unit passes through mathematical formulae, according to the normalized current/voltage signal that sets and ratio and angle difference signal, sample calculation goes out the value of each sampled point, then dresses up standard IEC 61850 Frames according to the IEC61850-9-1/2 protocol groups.
5. the electronic transducer calibration instrument method of calibration based on digital source adopts electronic transducer calibration instrument calibration equipment as claimed in claim 1, it is characterized in that: comprise the steps:
1) at first by man-machine interaction unit following 4 parameters are set:
Normalized current/voltage effective value
The standard error of this electronic transducer calibration instrument calibration equipment output: ratio
And angular difference
Sample frequency corresponding to output IEC61850 Frame
2) then the synchro source control module is controlled current/voltage output module outputting standard current/voltage signal according to correlation parameter
, wherein
t=0 is the synchronizing pulse output module output pulse per second (PPS) moment corresponding to rising edge constantly, when
t=0 o'clock,
=0;
fBe the frequency of normalized current/voltage signal, its ratings is 50Hz;
3) digital output control unit is according to correlation parameter simultaneously, and the value that calculates each sample point according to formula is:
, wherein
NBe the sequence number value of sampled point, its value since 0 to
-1 finishes; The circulation that so goes round and begins again, cycle period is 1s; The numeral output control unit is respectively sampled after the point value according to formula, according to the IEC61850 data protocol it is assembled into IEC61850 Frame and control figure output unit outputting standard IEC61850 Frame; Numeral output unit outputting standard IEC61850 Frame is spaced apart
, its shake is no more than 10
4) normalized current/voltage signal of the analog input unit received current/voltage in the tested electronic transducer calibration instrument/output module output, the synchronizing pulse receiver module receives the pulse per second (PPS) synchronizing signal of synchronizing pulse output module; Triggering Imitating input block at the synchronizing pulse receiver module carries out the A/D sampling to normalized current/voltage signal, and the result is outputed in the error calculation unit; Meanwhile the IEC61850 signal receiving unit in the tested electronic transducer calibration instrument receives standard IEC 61850 Frames of digital output unit output, and resolves, and analysis result is sent to error calculation unit; The signal that error calculation unit sends over according to simulation output unit and IEC61850 signal receiving unit carries out error and calculates, obtain ratio and angular difference, the standard error of this electronic transducer calibration instrument calibration equipment output that itself and man-machine interaction unit are arranged: ratio
And angular difference
Compare and to obtain the error of tested electronic transducer calibration instrument.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210436816.XA CN102944861B (en) | 2012-11-06 | 2012-11-06 | Electronic transformer calibrator calibration device and method based on digital source |
| PCT/CN2013/080269 WO2014071753A1 (en) | 2012-11-06 | 2013-07-29 | Electronic transformer calibrator calibration device and method based on digital source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210436816.XA CN102944861B (en) | 2012-11-06 | 2012-11-06 | Electronic transformer calibrator calibration device and method based on digital source |
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| CN102944861B CN102944861B (en) | 2015-05-06 |
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| CN110967658A (en) * | 2018-09-29 | 2020-04-07 | 武汉格蓝若智能技术有限公司 | Analog input merging unit calibrator tracing method based on digital differential method |
| CN110596485A (en) * | 2019-08-22 | 2019-12-20 | 国网安徽省电力有限公司 | Digital-analog integrated tester and digital-analog synchronous output method thereof |
| CN111679238A (en) * | 2020-06-16 | 2020-09-18 | 国网四川省电力公司电力科学研究院 | System and method for testing broadband transmission characteristics of direct current transformer |
| CN111679238B (en) * | 2020-06-16 | 2022-07-22 | 国网四川省电力公司电力科学研究院 | System and method for testing broadband transmission characteristics of direct current transformer |
| CN112180314A (en) * | 2020-09-25 | 2021-01-05 | 南京国电南自电网自动化有限公司 | Anti-interference self-correction GIS electronic transformer acquisition method and device |
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| CN102944861B (en) | 2015-05-06 |
| WO2014071753A1 (en) | 2014-05-15 |
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