CN201859212U - Novel calibration device of electronic type mutual inductor - Google Patents
Novel calibration device of electronic type mutual inductor Download PDFInfo
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- CN201859212U CN201859212U CN2010202857609U CN201020285760U CN201859212U CN 201859212 U CN201859212 U CN 201859212U CN 2010202857609 U CN2010202857609 U CN 2010202857609U CN 201020285760 U CN201020285760 U CN 201020285760U CN 201859212 U CN201859212 U CN 201859212U
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- mutual inductor
- inductor
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Abstract
The utility model discloses a novel calibration device of an electronic type mutual inductor, which comprises a calibration power supply and a standard analog mutual inductor, wherein the calibration power supply is respectively connected with the standard analog mutual inductor and the electronic type mutual inductor to be detected; the output end of the standard analog mutual inductor is connected with an analog mutual inductor calibrator after passing through an integrated circuit; if the electronic type mutual inductor to be detected outputs an analog signal, the output end of the electronic type mutual inductor to be detected is directly connected with the analog mutual inductor calibrator; and if the electronic type mutual inductor outputs a digital signal, the output end of the electronic type mutual inductor is connected with the analog mutual inductor calibrator through a merging unit and a digital/analog (DA) conversion circuit. Due to adopting the original calibration method of the analog mutual inductor, the calibration device has the characteristics of low manufacturing cost, high stability, high precision and the like. A measuring method is simple and feasible, and simultaneously, the development can be carried out on the basis of the original analog mutual inductor calibrator; if the calibrator is additionally provided with the DA conversion circuit, the electronic type mutual inductor calibration can be implemented on digital output so that the calibration method has very high technical flexibility.
Description
Technical field
The utility model relates to Power Parameters Measurement Device in a kind of electric system, relates in particular to a kind of calibration equipment of electronic mutual inductor.
Background technology
Fast development along with digital transformer substation and intelligent grid; electronic mutual inductor has obtained very rapidly development; it is the visual plant of electric energy metrical and relay protection in the electric system; the secondary output of electronic mutual inductor is different with traditional electromagnetic transformer; be divided into two kinds of numeral output and simulation outputs, high-voltage mutual inductor is generally realized numeral output by merge cells by Ethernet.This digital way of output is generally followed the standards such as IEC60044-7 electronic type voltage transformer standard, IEC60044-8 electronic current mutual inductor standard and IEC61850-9 that International Electrotechnical Commission issues.Safety, the stable operation of its long-time stability, reliability, security and electric system are closely related, underproof mutual inductor can have a strong impact on the safe operation of electric system, therefore mutual inductor must carry out verification to it before use or after long-term the use, after verification is qualified, can use.
Electronic transducer calibration instrument is the special-purpose exact instrument that is used to check and measure transformer error, at present more domestic producers measuring method commonly used has based on the electronic transducer calibration instrument of industrial computer with based on the electric mutual inductor tester of digital signal processor (DSP), and CN101413995A discloses a kind of apparatus for checking electronic type current mutual inductor as the Chinese invention patent application: two current sources send current signal A respectively
1And A
2, A
1Greater than A
2And the frequency difference, the benchmark mutual inductor is responsive A simultaneously
1With through amplifying the A of N after doubly
2, the responsive A of tested mutual inductor
1Merge cells simultaneously sends synchronization pulse to benchmark mutual inductor, tested mutual inductor and AD converter, and obtains the digital quantity of benchmark mutual inductor, tested transformer current sampled value constantly and the magnitude of voltage at sampling resistor two ends send control computer through the digital quantity of benchmark AD converter conversion back acquisition and after with its generated data frame at the synchronization pulse negative edge.Control computer is with the responsive A of benchmark mutual inductor
1The current signal of current signal that obtains and the output of tested mutual inductor compares, and tested mutual inductor ratio and angular difference are carried out verification, the responsive NA of benchmark mutual inductor
2Current signal that obtains and benchmark AD converter output voltage compare through the current signal that conversion obtains, and the benchmark mutual inductor is carried out self calibration.Though this calibration equipment has the high characteristics of testing accuracy, but the accuracy of the tested mutual inductor higher hamonic wave of verification simultaneously; But stability is not high, be not easy to secondary development, adopt merge cells to send synchronization pulse simultaneously to benchmark mutual inductor, tested mutual inductor and AD converter, and the magnitude of voltage that obtains the digital quantity of benchmark mutual inductor, tested transformer current sampled value and sampling resistor two ends at the synchronization pulse negative edge constantly send control computer through the digital quantity of benchmark AD converter conversion back acquisition and after with its generated data frame, this method is more loaded down with trivial details, keep in repair more tiredly, technology is still waiting further raising.
The utility model content
The utility model purpose is to overcome the deficiencies in the prior art, a kind of novel calibration equipment of electronic mutual inductor is provided, utilize the method for calibration of original technology maturation, simulation mutual inductor that precision is high, the signal of Electrical Instrument Transducers with Digital output directly is reduced into simulating signal carries out verification, have characteristics such as low cost of manufacture, good stability, precision height.
The technical solution of the utility model is achieved in that
A kind of novel calibration equipment of electronic mutual inductor, the tested electronic mutual inductor, integrated circuit and the simulation mutual-inductor tester that comprise adjustable verification power supply, standard analog mutual inductor, simulation output, described verification power supply links to each other with described standard analog mutual inductor and tested electronic mutual inductor respectively, it is characterized in that: the output terminal of described standard analog mutual inductor links to each other with described simulation mutual-inductor tester behind described integrated circuit; Described tested electronic mutual inductor output terminal links to each other with described simulation mutual-inductor tester.
A kind of novel calibration equipment of electronic mutual inductor, the tested electronic mutual inductor, integrated circuit and the simulation mutual-inductor tester that comprise adjustable verification power supply, standard analog mutual inductor, numeral output, described verification power supply links to each other with described standard analog mutual inductor and tested electronic mutual inductor respectively, it is characterized in that: the output terminal of described standard analog mutual inductor links to each other with described simulation mutual-inductor tester behind described integrated circuit; Described tested electronic mutual inductor output terminal links to each other with described simulation mutual-inductor tester through merging unit and DA change-over circuit.
The utility model compared with prior art has following advantage:
Because this calibration equipment adopts the method for calibration of original simulation mutual inductor, has characteristics such as low cost of manufacture, good stability, precision height.The measuring method simple possible, can develop on the basis based on former simulation mutual-inductor tester simultaneously, on tester, install one additional and meet IEC60044-8 electronic current mutual inductor standard and the IEC60044-7 electronic type voltage transformer is the DA change-over circuit of standard, just can realize making method of calibration have very big technology dirigibility to the checking electronic type transformers of numeral output.
Description of drawings
Fig. 1 is the novel calibration equipment structure principle chart of analog electrical output minor mutual inductor described in the utility model
Fig. 2 is the novel calibration equipment structure principle chart of numeral output electronic mutual inductor described in the utility model
1. verification power supply 2. standard analog mutual inductors 3. tested electronic mutual inductor 4. integrated circuits
5. simulate mutual-inductor tester 6. merge cells 7.DA change-over circuits
Embodiment
Following examples are used to illustrate the utility model, but are not used for limiting scope of the present utility model, and all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be limited by every claim.
As can be seen from Figure 1, a kind of novel calibration equipment of electronic mutual inductor, the tested electronic mutual inductor 3, integrated circuit 4 and the simulation mutual-inductor tester 5 that comprise adjustable verification power supply 1, standard analog mutual inductor 2, simulation output, described verification power supply 1 links to each other with described standard analog mutual inductor 2 and tested electronic mutual inductor 3 respectively, and the output terminal of described standard analog mutual inductor 2 links to each other with described simulation mutual-inductor tester 5 behind described integrated circuit 4; Tested electronic mutual inductor 3 output terminals of described simulation output link to each other with described simulation mutual-inductor tester 5.
In checking procedure, at first act on the primary circuit of the tested electronic mutual inductor 3 of standard analog mutual inductor 2 and simulation output by adjustable verification power supply 1, standard analog mutual inductor 2 produces corresponding to the standard analog voltage signal of primary voltage or corresponding to the standard analog voltage signal of primary current, the secondary of standard analog mutual inductor 2 produces many group standard analog voltage check signals, and this checking signal is input in the simulation mutual-inductor tester 5 after integrated circuit 4 is integrated into the nominal value of exporting corresponding to tested electronic mutual inductor 3 again; The tested simulating signal of tested electronic mutual inductor 3 outputs then is directly inputted in the simulation mutual-inductor tester 5 and standard analog voltage check signal compares, and draws ratio and angular difference.
As can be seen from Figure 2, a kind of novel calibration equipment of electronic mutual inductor, the tested electronic mutual inductor 3, integrated circuit 4 and the simulation mutual-inductor tester 5 that comprise adjustable verification power supply 1, standard analog mutual inductor 2, numeral output, described verification power supply 1 links to each other with described standard analog mutual inductor 2 and tested electronic mutual inductor 3 respectively, and the output terminal of described standard analog mutual inductor 2 links to each other with described simulation mutual-inductor tester 5 behind described integrated circuit 4; Described tested electronic mutual inductor 3 output terminals link to each other with described simulation mutual-inductor tester 5 through merging unit 6 and DA change-over circuit 7.
In checking procedure, at first act on the primary circuit of the tested electronic mutual inductor 3 of standard analog mutual inductor 2 and numeral output by adjustable verification power supply 1, standard analog mutual inductor 2 produces corresponding to the standard analog voltage signal of primary voltage or corresponding to the standard analog voltage signal of primary current, the secondary of standard analog mutual inductor 2 produces many group standard analog voltage check signals, and this checking signal is input in the simulation mutual-inductor tester 5 after integrated circuit 4 is integrated into the nominal value of exporting corresponding to tested electronic mutual inductor 3 again; The measured number signal of tested electronic mutual inductor 3 outputs, then digital signal is reduced into simulating signal through merge cells 6 and DA change-over circuit 7, be input to then the simulation mutual-inductor tester 5 in and standard analog voltage check signal compare, draw ratio and angular difference.
Claims (2)
1. the novel calibration equipment of an electronic mutual inductor, the tested electronic mutual inductor (3), integrated circuit (4) and the simulation mutual-inductor tester (5) that comprise adjustable verification power supply (1), standard analog mutual inductor (2), simulation output, it is characterized in that: described verification power supply (1) links to each other with described standard analog mutual inductor (2) and tested electronic mutual inductor (3) respectively, and the output terminal of described standard analog mutual inductor (2) links to each other with described simulation mutual-inductor tester (5) behind described integrated circuit (4); Tested electronic mutual inductor (3) output terminal of described simulation output links to each other with described simulation mutual-inductor tester (5).
2. the novel calibration equipment of an electronic mutual inductor, the tested electronic mutual inductor (3), integrated circuit (4) and the simulation mutual-inductor tester (5) that comprise adjustable verification power supply (1), standard analog mutual inductor (2), numeral output, it is characterized in that: described verification power supply (1) links to each other with described standard analog mutual inductor (2) and tested electronic mutual inductor (3) respectively, and the output terminal of described standard analog mutual inductor (2) links to each other with described simulation mutual-inductor tester (5) behind described integrated circuit (4); Described tested electronic mutual inductor (3) output terminal links to each other with described simulation mutual-inductor tester (5) through merging unit (6) and DA change-over circuit (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202857609U CN201859212U (en) | 2010-08-09 | 2010-08-09 | Novel calibration device of electronic type mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202857609U CN201859212U (en) | 2010-08-09 | 2010-08-09 | Novel calibration device of electronic type mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201859212U true CN201859212U (en) | 2011-06-08 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202857609U Expired - Fee Related CN201859212U (en) | 2010-08-09 | 2010-08-09 | Novel calibration device of electronic type mutual inductor |
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| CN (1) | CN201859212U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102662152A (en) * | 2012-05-15 | 2012-09-12 | 河南省电力公司济源供电公司 | Electronic type mutual inductor as well as system and method for verifying merging unit |
| CN103135013A (en) * | 2012-12-28 | 2013-06-05 | 辽宁省电力有限公司 | Detecting and evaluating system of data acquisition unit |
| CN104880686A (en) * | 2015-05-12 | 2015-09-02 | 贵州电力试验研究院 | Device and method for checking portable electronic current transformer |
| 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 |
-
2010
- 2010-08-09 CN CN2010202857609U patent/CN201859212U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102662152A (en) * | 2012-05-15 | 2012-09-12 | 河南省电力公司济源供电公司 | Electronic type mutual inductor as well as system and method for verifying merging unit |
| CN103135013A (en) * | 2012-12-28 | 2013-06-05 | 辽宁省电力有限公司 | Detecting and evaluating system of data acquisition unit |
| CN103135013B (en) * | 2012-12-28 | 2015-12-02 | 辽宁省电力有限公司 | Data acquisition unit test and assessment system |
| CN104880686A (en) * | 2015-05-12 | 2015-09-02 | 贵州电力试验研究院 | Device and method for checking portable electronic current transformer |
| CN104880686B (en) * | 2015-05-12 | 2019-04-26 | 贵州电力试验研究院 | A kind of portable electronic piece formula current transformer calibration device and method |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110608 Termination date: 20130809 |