CN103235279B - A kind of electric mutual inductor output verification device - Google Patents
A kind of electric mutual inductor output verification device Download PDFInfo
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- CN103235279B CN103235279B CN201310105693.6A CN201310105693A CN103235279B CN 103235279 B CN103235279 B CN 103235279B CN 201310105693 A CN201310105693 A CN 201310105693A CN 103235279 B CN103235279 B CN 103235279B
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- 238000012795 verification Methods 0.000 title claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000001360 synchronised effect Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Testing Electric Properties And Detecting Electric Faults (AREA)
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Abstract
The present invention relates to a kind of electric mutual inductor output verification device, comprise benchmark mutual inductor, converter, merge cells, data collecting card and tester, described benchmark mutual inductor is connected with data collecting card, the input end of described converter is connected with mutual inductor to be verified, output terminal is connected with data collecting card and merge cells respectively, and described merge cells, data collecting card are connected with tester respectively.Compared with prior art, the present invention has the advantages such as checking precision is high, easy to operate.
Description
Technical field
The present invention relates to a kind of transducer check technology, especially relate to a kind of electric mutual inductor output verification device.
Background technology
Describe according to IEC standard, electronic mutual inductor has analog quantity voltage or digital output.For the electric testing instrument of frequency 15 ~ 100Hz and the current-voltage transformer of protective relaying device.Its function visible, range of application and routine transformer are completely the same; difference is electronic mutual inductor output quantity; can for secondary device weak analog voltage signal directly or digital quantity; if electronic current mutual inductor analog output standard value is 22.5; 150; 200,225mV (measurement is used) and 4V (protect and use), digital output standard value is 2D41H (measure and use) and 01CFH (protect and use).And conventional current mutual inductor exports as current signal, be generally 5A or 1A, can Direct driver protective relaying device.Visible, the electronic mutual inductor way of output and the conventional electromagnetic mutual inductor way of output make a big difference, and traditional method of calibration cannot meet the requirement of checking electronic type transformers.
Summary of the invention
Object of the present invention is exactly to overcome the defect and the electric mutual inductor output verification device that provides a kind of checking precision high, easy to operate that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of electric mutual inductor output verification device, it is characterized in that, comprise benchmark mutual inductor, converter, merge cells, data collecting card and tester, described benchmark mutual inductor is connected with data collecting card, the input end of described converter is connected with mutual inductor to be verified, output terminal is connected with data collecting card and merge cells respectively, and described merge cells, data collecting card are connected with tester respectively.
Described converter comprises AD conversion unit, analog signal output mouth and digital signal delivery outlet, described mutual inductor to be verified is connected with AD conversion unit, analog signal output mouth respectively, described AD conversion unit is connected with digital signal delivery outlet, and described analog signal output mouth is connected with data collecting card.
Also comprise synchronous clock, this synchronous clock is located between data collecting card and merge cells.
Described data acquisition is arranged with two input channels and an output channel, and two described input channels are connected with the output terminal of benchmark mutual inductor and analog signal output mouth respectively, and described output channel is connected with PCI or the PXI interface of tester.
Described merge cells is connected with the Ethernet transmission interface of tester.
Compared with prior art, the present invention has the following advantages:
1, binary channels synchronized sampling, can ensure phase error measurement accuracy like this, absolute precision reaches more than 0.05%.
2, field-checking 0.2 grade of electronic mutual inductor requirement can be met.
3, because analog-and digital-verification is all direct method, not poor, thus standard channel and by verification electronic mutual inductor export do not need coupling, facilitate manufacturer's standard mutual inductor and support equipment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1, a kind of electric mutual inductor output verification device, comprise benchmark mutual inductor 1, converter, merge cells 5, data collecting card 6, synchronous clock 7 and tester 8, described benchmark mutual inductor 1 is connected with data collecting card 6, the input end of described converter is connected with mutual inductor 2 to be verified, output terminal is connected with data collecting card 6 and merge cells 5 respectively, and described merge cells 5, data collecting card 6 are connected with tester 8 respectively.Described synchronous clock 7 is located between data collecting card 6 and merge cells 8.
Described converter comprises AD conversion unit 3, analog signal output mouth 4 and digital signal delivery outlet, described mutual inductor to be verified 2 is connected with AD conversion unit 3, analog signal output mouth 4 respectively, described AD conversion unit 3 is connected with digital signal delivery outlet, and described analog signal output mouth 4 is connected with data collecting card 6.
Described data collecting card 6 is provided with two input channels and an output channel, and two described input channels are connected with the output terminal of benchmark mutual inductor 1 and analog signal output mouth 4 respectively, and described output channel is connected with PCI or the PXI interface of tester 8.Described merge cells 5 is connected with the Ethernet transmission interface of tester 8.
Simulation verifies by the present invention (adopting Direct Digital check addition) and digit check (adopting A/D mode) combines, and the requirement of each parts is as follows:
1, benchmark mutual inductor design, because analog-and digital-verification is all direct method, not poor, so standard channel and tested electronic mutual inductor export do not need coupling, facilitate manufacturer's standard mutual inductor and support equipment.
2, high-precise synchronization data collecting card is selected.A/D conversion is the key component of whole check system.And the angular difference impact of synchronized sampling on mutual inductor is very large.So select suitable data collecting card very crucial.
3, synchronous clock design.Synchronous clock and data acquisition card interface etc.
4, tester data processing software exploitation.Use virtual instrument technique, a lot of function has all been come by software, so the exploitation of output processing software is also very important, can strengthen the intelligent of whole system and interactivity.
Claims (2)
1. an electric mutual inductor output verification device, it is characterized in that, comprise benchmark mutual inductor, converter, merge cells, data collecting card and tester, described benchmark mutual inductor is connected with data collecting card, the input end of described converter is connected with mutual inductor to be verified, the output terminal of described converter is connected with data collecting card and merge cells respectively, and described merge cells, data collecting card are connected with tester respectively;
Described converter comprises AD conversion unit, analog signal output mouth and digital signal delivery outlet, described mutual inductor to be verified is connected with AD conversion unit, analog signal output mouth respectively, described AD conversion unit is connected with digital signal delivery outlet, and described analog signal output mouth is connected with data collecting card;
Described data acquisition is arranged with two input channels and an output channel, and two described input channels are connected with the output terminal of benchmark mutual inductor and analog signal output mouth respectively, and described output channel is connected with PCI or the PXI interface of tester;
Also comprise synchronous clock, this synchronous clock is located between data collecting card and merge cells.
2. a kind of electric mutual inductor output verification device according to claim 1, it is characterized in that, described merge cells is connected with the Ethernet transmission interface of tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310105693.6A CN103235279B (en) | 2013-03-28 | 2013-03-28 | A kind of electric mutual inductor output verification device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310105693.6A CN103235279B (en) | 2013-03-28 | 2013-03-28 | A kind of electric mutual inductor output verification device |
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| Publication Number | Publication Date |
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| CN103235279A CN103235279A (en) | 2013-08-07 |
| CN103235279B true CN103235279B (en) | 2016-03-23 |
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| CN201310105693.6A Active CN103235279B (en) | 2013-03-28 | 2013-03-28 | A kind of electric mutual inductor output verification device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103630867B (en) * | 2013-12-06 | 2016-10-12 | 国家电网公司 | A kind of charged calibration equipment of transformer |
| CN104020435B (en) * | 2014-06-16 | 2017-04-05 | 国网上海市电力公司 | A kind of metering low-voltage current mutual inductor pressure and error verification device of insulation |
| CN104569897B (en) * | 2014-12-11 | 2018-05-22 | 许继集团有限公司 | A kind of electronic current mutual inductor check system based on standard Rogowski coil |
| CN108630418B (en) * | 2018-06-15 | 2019-12-24 | 国网江苏省电力有限公司电力科学研究院 | Double-channel mutual-checking electronic current transformer based on hollow coil |
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| CN201156084Y (en) * | 2007-12-21 | 2008-11-26 | 中国西电电气股份有限公司 | Checking apparatus of electronic mutual inductor |
| 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 |
| CN201757779U (en) * | 2010-05-28 | 2011-03-09 | 深圳市科陆电子科技股份有限公司 | Electronic transformer calibrator |
| CN202661620U (en) * | 2012-05-15 | 2013-01-09 | 河南省电力公司济源供电公司 | Verification system for electronic-type mutual inductor and for merging unit |
| CN203178465U (en) * | 2013-03-28 | 2013-09-04 | 国家电网公司 | Electronic transformer output calibration device |
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2013
- 2013-03-28 CN CN201310105693.6A patent/CN103235279B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201156084Y (en) * | 2007-12-21 | 2008-11-26 | 中国西电电气股份有限公司 | Checking apparatus of electronic mutual inductor |
| 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 |
| CN201757779U (en) * | 2010-05-28 | 2011-03-09 | 深圳市科陆电子科技股份有限公司 | Electronic transformer calibrator |
| CN202661620U (en) * | 2012-05-15 | 2013-01-09 | 河南省电力公司济源供电公司 | Verification system for electronic-type mutual inductor and for merging unit |
| CN203178465U (en) * | 2013-03-28 | 2013-09-04 | 国家电网公司 | Electronic transformer output calibration device |
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| CN103235279A (en) | 2013-08-07 |
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