CN202995020U - Electronic transformer calibrator calibrating device based on digital source - Google Patents
Electronic transformer calibrator calibrating device based on digital source Download PDFInfo
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- CN202995020U CN202995020U CN 201220578275 CN201220578275U CN202995020U CN 202995020 U CN202995020 U CN 202995020U CN 201220578275 CN201220578275 CN 201220578275 CN 201220578275 U CN201220578275 U CN 201220578275U CN 202995020 U CN202995020 U CN 202995020U
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Abstract
An electronic transformer calibrator calibrating device based on digital source is characterized by comprising a human-machine interaction unit, a synchronous power supply control module, a current/voltage output module, a synchronous pulse output module, a digital output control unit and a digital output unit; the standard current/voltage and ratio difference and angular difference needed to be output are set via the human-machine action unit; the synchronous power supply control module controls the current/voltage output module according to the set standard current/voltage value to output the voltage and the current, and synchronously controls the synchronous pulse output module to output the synchronous pulse signal; and the digital output control unit obtains a standard IEC618501 data frame according to the set standard current/voltage and the ratio difference and the angular difference and controls the output thereof. The calibrating device generates the standard IEC61580 data frame by using a mathematical method, the time delaywith respect to another corresponding analog output signal is avoided; by adopting the digital method to superpose the ratio difference and the angular difference, the accuracy is high and the source is easy to trace.
Description
Technical field
The utility model relates to a kind of electronic transducer calibration instrument calibration equipment based on digital source, belongs 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, 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 to carry out sampling with high precision to one tunnel simulating signal wherein, 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.Add like this mode of numeral sampling by alternating current bridge, obtained a road sign quasi-analog signal, the one accurate IEC61850 Frame of 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, because needs are first completed 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, be equivalent to standard IEC 61850 Frames very large with respect to the absolute time-delay of primary current, 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 " samples to realize owing to also being based on standard A/D, also has the standard IEC 61850 Frames problem excessive with respect to the absolute time-delay of primary current.
In view of this, the utility model provides a kind of electronic transducer calibration instrument calibration equipment based on digital source, to address the above problem.
Summary of the invention
The purpose of this utility model is, in order to overcome the deficiencies in the prior art, thereby a kind of electronic transducer calibration instrument calibration equipment 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, between the analog output signal corresponding with other a tunnel, nothing is delayed time, and adopts numerical approach stack ratio and angular difference.
the technical scheme that the utility model adopts 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 controlled current/voltage output module output voltage and electric current according to the normalized current of setting/magnitude of voltage, the synchro source control module is also controlled synchronizing pulse output module output sync pulse signal simultaneously, its rising edge of a pulse is synchronizeed with current/voltage output module zero crossing, its frequency is 1Hz, the numeral output control unit draws standard IEC 61850 Frames according to normalized current/voltage and ratio and the angular difference set, and the output of control figure output unit.
Electronic transducer calibration instrument calibration equipment based on digital source as above 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 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.
Electronic transducer calibration instrument calibration equipment based on digital source as above 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; 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, phase differential is no more than 0.3 minute.
The beneficial effects of the utility model are: 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, traces to the source simple.
Description of drawings
Fig. 1 is the utility model embodiment 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 utility model embodiment 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 in electronic transducer calibration instrument calibration equipment 14 outputs is connected to the analog input unit 9 in 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; 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, phase differential is no more than 0.3 minute;
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 concrete enforcement, at first by man-machine interaction unit 2, relevant following 4 parameters are set:
1) normalized current (voltage) effective value
2) standard error (ratio of this electronic transducer calibration instrument calibration equipment output
And angular difference
);
3) sample frequency corresponding to output IEC61850 Frame
Then synchro source control module 3 is controlled current/voltage output module 4 outputting standard current/voltage signals according to correlation parameter
, wherein
t=0 constantly is the 5 output pulse per second (PPS) moment corresponding to rising edge of synchronizing pulse output module, because synchronous pulse per second (PPS) rising edge is constantly consistent with normalized current/voltage over zero, works as
t=0 o'clock,
=0.
fBe 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 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, 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 obtains respectively sampling after 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 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 modules.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 result is outputed in error calculation unit 12.Meanwhile the IEC61850 signal receiving unit in 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.
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 modification of making, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (3)
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 controlled current/voltage output module output voltage and electric current according to the normalized current of setting/magnitude of voltage, the synchro source control module is also controlled synchronizing pulse output module output sync pulse signal simultaneously, its rising edge of a pulse is synchronizeed with current/voltage output module zero crossing, its frequency is 1Hz, the numeral output control unit draws standard IEC 61850 Frames according to normalized current/voltage and ratio and the angular difference set, 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 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; 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, phase differential is no more than 0.3 minute.
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| CN 201220578275 CN202995020U (en) | 2012-11-06 | 2012-11-06 | Electronic transformer calibrator calibrating device based on digital source |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944861A (en) * | 2012-11-06 | 2013-02-27 | 中国电力科学研究院 | Electronic transformer calibrator calibration device and method based on digital source |
| CN103472431A (en) * | 2013-09-11 | 2013-12-25 | 国家电网公司 | Etalon of electronic current mutual inductor and verifying structures of electronic current mutual inductor |
| CN103543430A (en) * | 2013-09-27 | 2014-01-29 | 广东电网公司电力科学研究院 | Standard modulus synchronous signal source |
| 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 |
| CN103901390A (en) * | 2014-04-09 | 2014-07-02 | 国家电网公司 | Meter-source integrated detection device and method used for digitalized electric energy meter detection |
| CN103941214A (en) * | 2014-04-21 | 2014-07-23 | 国家电网公司 | Electronic transformer verification system and method on basis of TDC |
| CN103983930A (en) * | 2014-05-05 | 2014-08-13 | 国家电网公司 | Electronic transformer harmonic calibrator calibration device and method |
| CN106483489A (en) * | 2016-11-17 | 2017-03-08 | 云南电网有限责任公司电力科学研究院 | The assay device of the mutual-inductor tester based on detection feedback |
| CN109061540A (en) * | 2018-10-18 | 2018-12-21 | 国网浙江省电力有限公司电力科学研究院 | Electronic transformer angular difference standard device |
-
2012
- 2012-11-06 CN CN 201220578275 patent/CN202995020U/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102944861A (en) * | 2012-11-06 | 2013-02-27 | 中国电力科学研究院 | Electronic transformer calibrator calibration device and method based on digital source |
| 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 |
| WO2014071753A1 (en) * | 2012-11-06 | 2014-05-15 | 国家电网公司 | Electronic transformer calibrator calibration device and method based on digital source |
| CN103472431A (en) * | 2013-09-11 | 2013-12-25 | 国家电网公司 | Etalon of electronic current mutual inductor and verifying structures of electronic current mutual inductor |
| CN103472431B (en) * | 2013-09-11 | 2015-11-25 | 国家电网公司 | Electronic current mutual inductor standard and electronic current mutual inductor verification structure |
| CN103543430B (en) * | 2013-09-27 | 2014-09-03 | 广东电网公司电力科学研究院 | Standard modulus synchronous signal source |
| CN103543430A (en) * | 2013-09-27 | 2014-01-29 | 广东电网公司电力科学研究院 | Standard modulus synchronous signal source |
| 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 |
| CN103901390A (en) * | 2014-04-09 | 2014-07-02 | 国家电网公司 | Meter-source integrated detection device and method used for digitalized electric energy meter detection |
| CN103901390B (en) * | 2014-04-09 | 2016-04-20 | 国家电网公司 | The resource integrated pick-up unit of table detected for digitalized electrical energy meter and detection method |
| CN103941214A (en) * | 2014-04-21 | 2014-07-23 | 国家电网公司 | Electronic transformer verification system and method on basis of TDC |
| CN103941214B (en) * | 2014-04-21 | 2016-05-25 | 国家电网公司 | A kind of electronic type transformer checking system and method based on TDC |
| CN103983930A (en) * | 2014-05-05 | 2014-08-13 | 国家电网公司 | Electronic transformer harmonic calibrator calibration device and method |
| CN106483489A (en) * | 2016-11-17 | 2017-03-08 | 云南电网有限责任公司电力科学研究院 | The assay device of the mutual-inductor tester based on detection feedback |
| CN106483489B (en) * | 2016-11-17 | 2023-09-29 | 云南电网有限责任公司电力科学研究院 | Calibrating device of mutual-inductor check gauge based on detection feedback |
| CN109061540A (en) * | 2018-10-18 | 2018-12-21 | 国网浙江省电力有限公司电力科学研究院 | Electronic transformer angular difference standard device |
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| GR01 | Patent grant | ||
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Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER NAME: CHINA ELECTRIC POWER RESEARCH INSTITUTE |
|
| CP03 | Change of name, title or address |
Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee before: China Electric Power Research Institute Patentee before: State Grid Corporation of China |
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Granted publication date: 20130612 Effective date of abandoning: 20150506 |
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