CN102944861B - 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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- CN102944861B CN102944861B CN201210436816.XA CN201210436816A CN102944861B CN 102944861 B CN102944861 B CN 102944861B CN 201210436816 A CN201210436816 A CN 201210436816A CN 102944861 B CN102944861 B CN 102944861B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005070 sampling Methods 0.000 claims abstract description 13
- 230000001360 synchronised effect Effects 0.000 claims abstract description 8
- 238000004164 analytical calibration Methods 0.000 claims description 26
- 238000004364 calculation method Methods 0.000 claims description 19
- 230000003993 interaction Effects 0.000 claims description 12
- 230000000630 rising effect Effects 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000010606 normalization Methods 0.000 claims 1
- 238000012067 mathematical method Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000013459 approach Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
- G01R35/02—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
-
- 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 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 based on digital source and method, belong to the calibration to electronic transducer calibration instrument, calibrating and detection field.
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, as patent " field calibrator for electronic transformer ".But it is fewer for the method for calibration correlative study of electronic transducer calibration instrument.Patent " calibrating apparatus for electronic transducer calibration instrument based on alternating current bridge balance principle " proposes a kind of electronic transducer calibration instrument calibration equipment, first two-way simulating signal is produced by alternating current bridge, ratio and the angular difference of known standard is differed between this two-way simulating signal, then standard sampling device is adopted to carry out sampling with high precision to a wherein road simulating signal, by conversion unit of protocol, sampled value is formed Frame according to 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 of digital sample is added like this by alternating current bridge, obtain 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 this two paths of signals to carry out sampling and calculates, and the ratio that the error obtained and two paths of signals differ known standard is compared with angular difference and just can be obtained the error of tested electronic transducer calibration instrument.
But under this mode, because needs first complete sampling, the mode of assembled data frame transmission again, so the time delay compared with the standard IEC 61850 Frame analog output signal corresponding with an other road sent is larger, be equivalent to standard IEC 61850 Frame very large relative to the absolute time delay of primary current, can cause tested electronic transducer calibration instrument cannot be synchronous, cannot calibrate for error.
Owing to being also realize based on standard A/D sampling, also there is the problem that standard IEC 61850 Frame is excessive relative to the absolute time delay of primary current in patent " a kind of calibrating test device of electronic transducer calibration instrument ".
In view of this, the invention provides a kind of electronic transducer calibration instrument calibration equipment based on digital source and method, to solve the problem.
Summary of the invention
The object of the invention is, in order to overcome the deficiencies in the prior art, thus a kind of electronic transducer calibration instrument calibration equipment based on digital source and method, as a calibration measurement system, it have employed the mode that digital source and standard synchronisation impulse source combine, adopt mathematical formulae to produce the IEC61850 Frame of standard, without time delay between the analog output signal corresponding with an other road, and adopt numerical approach to superpose 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, synchro source control module, current/voltage output module, synchronizing pulse output module, numeral output control unit and digital output unit, during calibrated electronic formula mutual-inductor tester, laboratory technician arranges the normalized current/voltage and ratio and angular difference that need to export by man-machine interaction unit, synchro source control module controls current/voltage output module output voltage and electric current according to the normalized current/magnitude of voltage of setting, synchro source control module goes back control synchronization pulse output module output sync pulse signal simultaneously, its rising edge of a pulse is synchronous with current/voltage output module zero crossing, its frequency is 1Hz, numeral output control unit is according to the normalized current/voltage of setting and ratio and angular difference, and by calculating standard IEC 61850 Frame, and control figure output unit exports.
As above based on the electronic transducer calibration instrument calibration equipment of digital source, 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/voltage signal that current/voltage output module in electronic transducer calibration instrument calibration equipment exports is connected to the analog input unit in tested electronic transducer calibration instrument; The synchronous pulse per second (PPS) that synchronizing pulse output module exports exports the synchronizing pulse receiver module of tested electronic transducer calibration instrument to; Standard IEC 61850 Frame that digital output unit exports exports the IEC61850 signal receiving unit of tested electronic transducer calibration instrument to.
As above based on the electronic transducer calibration instrument calibration equipment of digital source, it is characterized in that, the normalized current scope that described current/voltage output module exports is 0-6A, and normalized current scope is 0-120V, and class of accuracy is 0.01 grade; Between its rising edge of pps pulse per second signal that synchronizing pulse output module exports and normalized current/voltage signal zero crossing that current/voltage output module exports, phase differential is no more than 0.3 point.
As above based on the electronic transducer calibration instrument calibration equipment of digital source, it is characterized in that, described digital output control unit passes through mathematical formulae, according to the normalized current/voltage signal set and ratio and angle difference signal, sample calculation goes out the value of each sampled point, then dresses up standard IEC 61850 Frame according to 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 electronic transducer calibration instrument calibration equipment as above, it is characterized in that: comprise the steps:
1) first following 4 parameters are set by man-machine interaction unit:
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 IEC61850 Frame is exported
;
2) then synchro source control module controls current/voltage output module outputting standard current/voltage signal according to correlation parameter
, wherein
t=0 moment was that synchronizing pulse output module exports moment corresponding to pulse per second (PPS) rising edge, when
twhen=0,
=0;
ffor 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 going out each sample point according to formulae discovery is:
, wherein
;
nfor the sequence number value of sampled point, its value from 0 to
-1 terminates; So go round and begin again circulation, and cycle period is 1s; Numeral output control unit is assembled into IEC61850 Frame according to IEC61850 data protocol and control figure output unit outputting standard IEC61850 Frame after obtaining each sampling point value according to formula; Digital output unit outputting standard IEC61850 Frame is spaced apart
, its shake is no more than 10
;
4) normalized current/voltage signal that the analog input unit received current/voltage in tested electronic transducer calibration instrument/output module exports, synchronizing pulse receiver module receives the pulse per second (PPS) synchronizing signal of synchronizing pulse output module; At the triggering Imitating input block of synchronizing pulse receiver module, A/D sampling is carried out to normalized current/voltage signal, and result is outputted in error calculation unit; IEC61850 signal receiving unit meanwhile in tested electronic transducer calibration instrument receives standard IEC 61850 Frame that digital output unit exports, and resolves, and analysis result is sent to error calculation unit; The signal that error calculation unit sends over according to modulating output unit and IEC61850 signal receiving unit carries out error calculation, obtain ratio and angular difference, the standard error by this electronic transducer calibration instrument calibration equipment that itself and man-machine interaction unit are arranged exports: ratio
and angular difference
compare and can 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 Frame, need not be obtained by analog sampling, without time delay between the analog output signal corresponding with an other road; 2) adopt numerical approach superposition ratio and angular difference, accuracy is high, traces to the source simple.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention principle of work block diagram.
Fig. 2 is synchronizing pulse and electric current (voltage) oscillogram.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only 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 claims limited range listed by 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-digital 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 present 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, normalized current/voltage signal that the current/voltage output module 4 in electronic transducer calibration instrument calibration equipment 1 exports is connected to the analog input unit 9 in tested electronic transducer calibration instrument 8; The synchronous pulse per second (PPS) that synchronizing pulse output module 5 exports exports synchronizing pulse receiver module 10 to; Standard IEC 61850 Frame that digital output unit 7 exports exports IEC61850 signal receiving unit to.
The normalized current scope that current/voltage output module 4 wherein exports is 0-6A, and normalized current scope is 0-120V, and class of accuracy is 0.01 grade; Between its rising edge of pps pulse per second signal that synchronizing pulse output module 5 exports and normalized current/voltage signal zero crossing that current/voltage output module 4 exports, phase differential is no more than 0.3 point;
Digital output control unit is wherein by mathematical formulae, and according to the normalized current/voltage signal set and ratio angle difference signal, sample calculation goes out the value of each sampled point, then dresses up standard IEC 61850 Frame according to IEC61850-9-1/2 protocol groups.
During concrete enforcement, first relevant following 4 parameters are set by man-machine interaction unit 2:
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 IEC61850 Frame is exported
;
Then synchro source control module 3 controls current/voltage output module 4 outputting standard current/voltage signal according to correlation parameter
, wherein
t=0 moment was that synchronizing pulse output module 5 exports moment corresponding to pulse per second (PPS) rising edge, because synchronous pulse per second (PPS) rising edge is consistent with normalized current/voltage over zero moment, then when
twhen=0,
=0.
ffor the frequency of normalized current/voltage signal, its ratings is 50Hz.
Digital output control unit 6 is according to correlation parameter simultaneously, and the value going out each sample point according to formulae discovery is:
, wherein
.
nfor the sequence number value of sampled point, its value from 0 to
-1 terminates.As
=4000Hz, then N value is from 0 to 3999, and then from 0, so go round and begin again circulation, and cycle period is 1s.Numeral output control unit 6 is assembled into IEC61850 Frame according to IEC61850 data protocol and control figure output unit 7 outputting standard IEC61850 Frame after obtaining each sampling point value according to formula.Digital output unit 7 outputting standard IEC61850 Frame is spaced apart
, its shake is no more than 10
.
Normalized current/voltage signal that analog input unit received current in tested electronic transducer calibration instrument 8/voltage/output module 4 exports, synchronizing pulse receiver module 10 receives the pulse per second (PPS) synchronizing signal of synchronizing pulse output module.Carry out A/D sampling at triggering Imitating input block 9 pairs of normalized current/voltage signals of synchronizing pulse receiver module 10, and result is outputted in error calculation unit 12.IEC61850 signal receiving unit 11 meanwhile in tested electronic transducer calibration instrument 8 receives standard IEC 61850 Frame that digital output unit 7 exports, and resolves, and analysis result is sent to error calculation unit 12.The signal that error calculation unit 12 sends over according to modulating output unit 9 and IEC61850 signal receiving unit 11 carries out error calculation, obtain ratio and angular difference, by the standard error (ratio that this electronic transducer calibration instrument calibration equipment that itself and man-machine interaction unit 2 are arranged exports
and angular difference
) comparing to obtain the error of tested electronic transducer calibration instrument.
These are only embodiments of the invention, be not limited to the present invention, therefore, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within right of the present invention.
Claims (5)
1. the electronic transducer calibration instrument calibration equipment based on digital source, it is characterized in that: comprise man-machine interaction unit, synchro source control module, current/voltage output module, synchronizing pulse output module, numeral output control unit and digital output unit, during calibrated electronic formula mutual-inductor tester, laboratory technician arranges the normalized current/voltage and ratio and angular difference that need to export by man-machine interaction unit, synchro source control module controls current/voltage output module output voltage and electric current according to the normalized current/magnitude of voltage of setting, synchro source control module goes back control synchronization pulse output module output sync pulse signal simultaneously, its rising edge of a pulse is synchronous with current/voltage output module zero crossing, its frequency is 1Hz, numeral output control unit is according to the normalized current/voltage of setting and ratio and angular difference, and by calculating standard IEC 61850 Frame, and control figure output unit exports.
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/voltage signal that current/voltage output module in electronic transducer calibration instrument calibration equipment exports is connected to the analog input unit in tested electronic transducer calibration instrument; The synchronous pulse per second (PPS) that synchronizing pulse output module exports exports the synchronizing pulse receiver module of tested electronic transducer calibration instrument to; Standard IEC 61850 Frame that digital output unit exports exports 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 that described current/voltage output module exports is 0-6A, and normalization voltage range is 0-120V, and class of accuracy is 0.01 grade; Between its rising edge of pps pulse per second signal that synchronizing pulse output module exports and normalized current/voltage signal zero crossing that current/voltage output module exports, phase differential is no more than 0.3 point.
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 set and ratio and angle difference signal, sample calculation goes out the value of each sampled point, then dresses up standard IEC 61850 Frame according to IEC61850-9-1/2 protocol groups.
5., based on an electronic transducer calibration instrument method of calibration for digital source, adopt electronic transducer calibration instrument calibration equipment as claimed in claim 2, it is characterized in that: comprise the steps:
1) first following 4 parameters are set by man-machine interaction unit:
A) normalized current/voltage effective value
i n ;
B) standard error of this electronic transducer calibration instrument calibration equipment output: ratio
and angular difference
;
C) sample frequency corresponding to IEC61850 Frame is exported
f s ;
2) then synchro source control module controls current/voltage output module outputting standard current/voltage signal according to correlation parameter
, wherein
t=0 moment was that synchronizing pulse output module exports moment corresponding to pulse per second (PPS) rising edge, when
twhen=0,
=0;
ffor 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 going out each sample point according to formulae discovery is:
, wherein
,
,
;
nfor the sequence number value of sampled point, its value from 0 to
f s -1 terminates; So go round and begin again circulation, and cycle period is 1s; Numeral output control unit is assembled into IEC61850 Frame according to IEC61850 data protocol and control figure output unit outputting standard IEC61850 Frame after obtaining each sampling point value according to formula; Digital output unit outputting standard IEC61850 Frame is spaced apart △
t, its shake is no more than 10
μ s;
4) normalized current/voltage signal that the analog input unit received current in tested electronic transducer calibration instrument/voltage output module exports, synchronizing pulse receiver module receives the pulse per second (PPS) synchronizing signal of synchronizing pulse output module; At the triggering Imitating input block of synchronizing pulse receiver module, A/D sampling is carried out to normalized current/voltage signal, and result is outputted in error calculation unit; IEC61850 signal receiving unit meanwhile in tested electronic transducer calibration instrument receives standard IEC 61850 Frame that digital output unit exports, and resolves, and analysis result is sent to error calculation unit; The signal that error calculation unit sends over according to modulating output unit and IEC61850 signal receiving unit carries out error calculation, obtain ratio and angular difference, the standard error by this electronic transducer calibration instrument calibration equipment that itself and man-machine interaction unit are arranged exports: ratio
and angular difference
compare and can obtain the error of tested electronic transducer calibration instrument.
Priority Applications (2)
| 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 |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
|---|---|
| CN102944861A CN102944861A (en) | 2013-02-27 |
| CN102944861B true CN102944861B (en) | 2015-05-06 |
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|---|---|
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| WO (1) | WO2014071753A1 (en) |
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| CN117310240B (en) * | 2023-11-30 | 2024-02-09 | 国网山西省电力公司营销服务中心 | Signal source generation system and method for calibrating device of transformer calibrator |
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| CN102944861B (en) * | 2012-11-06 | 2015-05-06 | 国家电网公司 | Electronic transformer calibrator calibration device and method based on digital source |
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| US5453697A (en) * | 1993-09-09 | 1995-09-26 | Carma Industries | Technique for calibrating a transformer element |
| CN101718851A (en) * | 2009-12-15 | 2010-06-02 | 广东电网公司电力科学研究院 | Calibrating apparatus for electronic transducer calibration instrument based on alternating current bridge balance principle |
| CN101872004A (en) * | 2010-03-04 | 2010-10-27 | 国网电力科学研究院 | Calibrating test device of electronic type transformer checking instrument |
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| CN109100672A (en) * | 2018-10-18 | 2018-12-28 | 深圳供电局有限公司 | A kind of adjustment system and adjusting process of the voltage and current sampling module suitable for non-intrusion type load monitoring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102944861A (en) | 2013-02-27 |
| WO2014071753A1 (en) | 2014-05-15 |
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