CN202929194U - Calibrating device for dc electric energy meter - Google Patents
Calibrating device for dc electric energy meter Download PDFInfo
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- CN202929194U CN202929194U CN 201220509204 CN201220509204U CN202929194U CN 202929194 U CN202929194 U CN 202929194U CN 201220509204 CN201220509204 CN 201220509204 CN 201220509204 U CN201220509204 U CN 201220509204U CN 202929194 U CN202929194 U CN 202929194U
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- energy meter
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- 238000009434 installation Methods 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding 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
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model provides a calibrating device for a dc electric energy meter, comprising a tested dc electric energy meter, a standard resistor, a control computer, and a dc voltage source, a dc current source, a counter, a digital voltmeter and a DCC (direct current comparator) type current proportioner connected with the control computer respectively. Voltage signals generated by the dc voltage source are connected with the digital voltmeter and the voltage input end of the tested dc electric energy meter in parallel; current signals generated by the dc current source are successively connected with the current input end of the tested electric energy meter and the input end of the DCC type current proportioner in series; the DCC type current proportioner is connected with the digital voltmeter via the standard resistor; and pulse output signals of the tested dc electric meter are input into the counter. The calibrating device can calibrate dc electric meters or dc standard electric meters connected directly or via a mutual inductor, wherein the calibrating range is 0-1200V and 0.1-1000A, and the calibrating result can reach national standard.
Description
Technical field
The utility model relates to calibrating installation, is specifically related to a kind of direct current energy meter calibrating installation.
Background technology
The eighties in 19th century, because being increased to high voltage with the direct current low-voltage, inconvenience carries out long-distance transmissions, galvanic application is restricted, make way for gradually alternating current, but along with the use of novel energy, the application of direct current transportation mode and the popularization of electric automobile, direct current energy has progressed into again people's sight line.Owing to lacking for a long time applied environment, the direct current energy metering has become the blank in the existing field of tracing to the source.Theoretically, direct current energy measures due to the problem that does not need to consider phase place, should more easily realize than the metering of AC energy.But because direct current energy metering referent comprises the fields such as electric automobile, generation of electricity by new energy, itself also has certain characteristics: DC voltage is not desirable straight line output, may have the pulsating waveform that produces due to AC-DC conversion; The DC current and the magnitude of voltage that are applied to charging electric vehicle are larger, need to consider this problem in the output of power supply, voltage, current measurement process, thereby need research to be applicable to the direct current energy meter calibrating installation of these frontiers.
The utility model content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of direct current energy meter calibrating installation, can calibrate direct access or through mutual inductor access type direct current energy meter, direct current standard electric energy meter, calibration range (0 ~ 1200V, 0.1A ~ 1000A), calibration result can be traceable to national standard.
To achieve these goals, the utility model is taked following scheme:
A kind of direct current energy meter calibrating installation is provided, and described device comprises tested direct current energy meter, measuring resistance, control computing machine and the direct voltage source, DC current source, counter, digital voltmeter and the dc comparator formula current ratio device that are connected respectively with described control computing machine; The voltage input end of the voltage signal that described direct voltage source the produces described digital voltmeter of access in parallel and described tested direct current energy meter, the current signal series connection that described DC current source produces accesses the current input terminal of described tested direct current energy meter and the input end of described dc comparator formula current ratio device successively, described dc comparator formula current ratio device connects described digital voltmeter by described measuring resistance, the described counter of pulse output signals input of described tested direct current energy meter.
The current signal of described DC current source output carries out ratio by described dc comparator formula current ratio device to be dwindled.
The electric current output area of described DC current source is 0.1A～1000A, and the voltage range of described direct voltage source output is 0V～1100V.
Described dc comparator formula current ratio device carries out ratio to current signal to be dwindled, and the ratio accuracy is less than 5 * 10
-6
Described dc comparator formula current ratio device output signal becomes voltage signal through described measuring resistance, and described digital voltmeter is measured described voltage signal.
Described digital voltmeter is eight Semi-digital voltage tables, and accuracy of measurement is less than 10 * 10
-6
Described measuring resistance is First class standard resistance, and its year, stability was less than 2 * 10
-6
Compared with prior art, the beneficial effects of the utility model are: the utility model utilizes dc comparator formula current ratio standard device greatly to improve the calibration current scope, improve accuracy of measurement, used computing machine to control, improved the automaticity of calibration process; Utilize this device can calibrate direct access or through mutual inductor access type direct current energy meter, direct current standard electric energy meter, calibrate value and can be traceable to national highest standard; Install simple and reliable, stable high.
Description of drawings
Fig. 1 is direct current energy meter calibrating installation structure principle chart.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As Fig. 1, the utility model provides a kind of direct current energy meter calibrating installation, and described device comprises tested direct current energy meter, measuring resistance, control computing machine and is connected direct voltage source, DC current source, counter, digital voltmeter and the dc comparator formula current ratio device that gpib bus and described control computing machine are connected respectively; Digital voltmeter comprises digital voltage Table A and digital voltmeter B, the voltage input end of the voltage signal that described direct voltage source the produces described digital voltage Table A of access in parallel and described tested direct current energy meter, the current signal series connection that described DC current source produces accesses the current input terminal of described tested direct current energy meter and the input end of described dc comparator formula current ratio device successively, described dc comparator formula current ratio device connects described digital voltmeter B by described measuring resistance, the described counter of pulse output signals input of described tested direct current energy meter.
The current signal of described DC current source output carries out ratio by described dc comparator formula current ratio device to be dwindled.
The electric current output area of described DC current source is 0.1A～1000A, and the voltage range of described direct voltage source output is 0V～1100V.
Described dc comparator formula current ratio device carries out ratio to current signal to be dwindled, and the ratio accuracy is less than 5 * 10
-6Dc comparator formula direct current proportioner is based on the magnetic modulation type dc comparator: be and the current related quantity of magnetism indirectly to compare with the current transformation of tested electric current and the output of driven power supply.Namely on iron core coiling fixedly winding Ns and variable winding Nx, current flowing Is and Ix separately, the magnetic potential numerical value equal direction that they produce on iron core is opposite, i.e. ampere-turn equilibrium, IsNs=IxNx.When magnetic potential is uneven, by flux detection device detecting signal, automatically go to control the current values of driven power supply, make ampere-turn recover to equate.The method accuracy is high, good stability, to environment temperature and supply voltage without being strict with.
Described dc comparator formula current ratio device output signal becomes voltage signal through described measuring resistance, and described digital voltmeter is measured described voltage signal.
Described digital voltage Table A and digital voltmeter B are eight Semi-digital voltage tables, and accuracy of measurement is less than 10 * 10
-6
Described measuring resistance is First class standard resistance, and its year, stability was less than 2 * 10
-6
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment, the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (7)
1. direct current energy meter calibrating installation is characterized in that: described device comprises tested direct current energy meter, measuring resistance, control computing machine and the direct voltage source, DC current source, counter, digital voltmeter and the dc comparator formula current ratio device that are connected respectively with described control computing machine; The voltage input end of the voltage signal that described direct voltage source the produces described digital voltmeter of access in parallel and described tested direct current energy meter, the current signal series connection that described DC current source produces accesses the current input terminal of described tested direct current energy meter and the input end of described dc comparator formula current ratio device successively, described dc comparator formula current ratio device connects described digital voltmeter by described measuring resistance, the described counter of pulse output signals input of described tested direct current energy meter.
2. direct current energy meter calibrating installation according to claim 1 is characterized in that: the current signal of described DC current source output carries out ratio by described dc comparator formula current ratio device to be dwindled.
3. direct current energy meter calibrating installation according to claim 1, it is characterized in that: the electric current output area of described DC current source is 0.1A～1000A, the voltage range of described direct voltage source output is 0V～1100V.
4. direct current energy meter calibrating installation according to claim 1, it is characterized in that: described dc comparator formula current ratio device carries out ratio to current signal to be dwindled, and the ratio accuracy is less than 5 * 10
-6
5. direct current energy meter calibrating installation according to claim 4, it is characterized in that: described dc comparator formula current ratio device output signal becomes voltage signal through described measuring resistance, and described digital voltmeter is measured described voltage signal.
6. direct current energy meter calibrating installation according to claim 1, it is characterized in that: described digital voltmeter is eight Semi-digital voltage tables, and accuracy of measurement is less than 10 * 10
-6
7. direct current energy meter calibrating installation according to claim 1, it is characterized in that: described measuring resistance is First class standard resistance, its year, stability was less than 2 * 10
-6
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220509204 CN202929194U (en) | 2012-09-27 | 2012-09-27 | Calibrating device for dc electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220509204 CN202929194U (en) | 2012-09-27 | 2012-09-27 | Calibrating device for dc electric energy meter |
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| Publication Number | Publication Date |
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| CN202929194U true CN202929194U (en) | 2013-05-08 |
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| CN 201220509204 Expired - Lifetime CN202929194U (en) | 2012-09-27 | 2012-09-27 | Calibrating device for dc electric energy meter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914760A (en) * | 2012-09-27 | 2013-02-06 | 中国电力科学研究院 | Direct-current power meter calibrating device |
| CN103913719A (en) * | 2014-04-18 | 2014-07-09 | 国家电网公司 | Method for judging mistaken powering-down fault causes of single-phase carrier intelligent electric meter |
| CN105093165A (en) * | 2015-09-08 | 2015-11-25 | 国家电网公司 | Comprehensive test method of pulse signals of digitization electric energy meter |
| CN105425197A (en) * | 2015-11-10 | 2016-03-23 | 深圳市科陆电子科技股份有限公司 | DC energy meter calibration method and system |
| CN107589394A (en) * | 2017-09-19 | 2018-01-16 | 国网江西省电力公司电力科学研究院 | A kind of electric energy meter direct current and even-order harmonic pilot system and method |
| CN109856336A (en) * | 2019-02-28 | 2019-06-07 | 中国矿业大学 | A kind of method of determining MEMS methane transducer recommended current |
| CN109975737A (en) * | 2019-03-05 | 2019-07-05 | 国网浙江省电力有限公司电力科学研究院 | Direct current calibrating installation based on the high steady power source of measuring resistance method adjustment |
-
2012
- 2012-09-27 CN CN 201220509204 patent/CN202929194U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914760A (en) * | 2012-09-27 | 2013-02-06 | 中国电力科学研究院 | Direct-current power meter calibrating device |
| CN102914760B (en) * | 2012-09-27 | 2015-11-04 | 中国电力科学研究院 | A kind of direct current energy meter calibrating installation |
| CN103913719A (en) * | 2014-04-18 | 2014-07-09 | 国家电网公司 | Method for judging mistaken powering-down fault causes of single-phase carrier intelligent electric meter |
| CN103913719B (en) * | 2014-04-18 | 2015-11-04 | 国家电网公司 | A kind of method judging single-phase carrier intelligent electric meter mistake power down failure cause |
| CN105093165A (en) * | 2015-09-08 | 2015-11-25 | 国家电网公司 | Comprehensive test method of pulse signals of digitization electric energy meter |
| CN105093165B (en) * | 2015-09-08 | 2017-06-16 | 国家电网公司 | A kind of integrated test facility of digitalized electrical energy meter pulse signal |
| CN105425197A (en) * | 2015-11-10 | 2016-03-23 | 深圳市科陆电子科技股份有限公司 | DC energy meter calibration method and system |
| CN105425197B (en) * | 2015-11-10 | 2018-09-21 | 深圳市科陆电子科技股份有限公司 | Direct current energy meter correction method and system |
| CN107589394A (en) * | 2017-09-19 | 2018-01-16 | 国网江西省电力公司电力科学研究院 | A kind of electric energy meter direct current and even-order harmonic pilot system and method |
| CN107589394B (en) * | 2017-09-19 | 2020-06-23 | 国网江西省电力公司电力科学研究院 | Direct current and even harmonic test system and method for electric energy meter |
| CN109856336A (en) * | 2019-02-28 | 2019-06-07 | 中国矿业大学 | A kind of method of determining MEMS methane transducer recommended current |
| CN109975737A (en) * | 2019-03-05 | 2019-07-05 | 国网浙江省电力有限公司电力科学研究院 | Direct current calibrating installation based on the high steady power source of measuring resistance method adjustment |
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Granted publication date: 20130508 |
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| CX01 | Expiry of patent term |