CN102879760B - Method and device for checking errors of direct current electric energy meter by using standard alternating current electric energy meter - Google Patents
Method and device for checking errors of direct current electric energy meter by using standard alternating current electric energy meter Download PDFInfo
- Publication number
- CN102879760B CN102879760B CN201210372453.8A CN201210372453A CN102879760B CN 102879760 B CN102879760 B CN 102879760B CN 201210372453 A CN201210372453 A CN 201210372453A CN 102879760 B CN102879760 B CN 102879760B
- Authority
- CN
- China
- Prior art keywords
- current
- energy meter
- energy
- direct current
- standard scale
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a method and a device for checking errors of a direct current electric energy meter by using a standard alternating current electric energy meter. Alternating current is input to the standard alternating current meter, the alternating current is converted into direct current through direct current and then input to the direct current electric energy meter to be tested, and according to the principle that an effective value of the input alternating current of the standard alternating current electric energy meter and an effective value of the input direct current of the direct current electric energy meter to be tested are equivalent, errors of the direct current electric energy meter are checked by using the standard alternating current electric energy meter. According to the method and the device, the standard alternating current electric energy meter is used, so that errors of the direct current electric energy meter to be tested can be checked, and the method and the device are convenient to use.
Description
Technical field
The present invention relates to the error checking field of direct current energy meter, relate in particular to a kind of AC energy standard scale of using and realize the method and apparatus to direct current energy meter error checking.
Background technology
At present, the accuracy of verification electric energy meter normally realizes by relative method, use exactly a high-precision standard electric energy meter and one by school electric energy meter, connect voltage source and current source simultaneously, make standard electric energy meter and measured electric energy by school electric energy meter, by comparing the metering energy value of these two electric energy meters or comparing this two electrical energy pulses that electric energy meter sends, calculate by school electric energy meter error.All at present the system that adopts Alternating Current Power Supply and electricity consumption in the world, use be all AC energy meter.And along with the development of green energy, the utilization of direct supply is more and more, as direct current cabinet, solar powered, telecomm base station, subway, electric motorcar charging station etc.Also be just accompanied by a large amount of appearance of direct current energy meter, recently the manufacturer such as instrument wasion, Xu Ji is is constantly researching and developing direct current energy meter, and this has just required direct-current electric energy meter calibrating device, will have direct current standard scale.But at present direct current standard scale does not also occur, if replace direct current standard scale to remove to examine and determine direct current energy meter with interchange standard electric energy meter, should be an extraordinary scheme.
Summary of the invention
The object of this invention is to provide a kind of AC energy standard scale of using and realize the apparatus and method to direct current energy meter error checking, verification is easy to use.
The present invention adopts following technical proposals: a kind of method that realizes direct current energy meter error checking with AC energy standard scale, alternating current is input to AC energy standard scale, alternating current is input to tested direct current energy meter after overcommutation becomes DC current, the output signal of AC energy standard scale and the output signal of tested direct current energy meter are input to error calculation unit, the effective value that utilizes the input AC electric current of AC energy standard scale and the input direct-current electric current of tested direct current energy meter is equivalent principle, realization is carried out error checking with AC energy standard scale to direct current energy meter.
The present invention also provides a kind of use AC energy standard scale of realizing said method to realize the device of direct current energy meter error checking, comprise AC energy standard scale, ac current source, make the output current transformer of ac current source output transform to required current value, the current sampling mutual inductor that the electric current of output current transformer output is sampled, error calculation unit, the output current of described current sampling mutual inductor is input to AC energy standard scale, the input current of described current sampling mutual inductor is also input to tested direct current energy meter by current rectifying and wave filtering circuit, the output pulse of described AC energy standard scale and the output pulse of tested direct current energy meter output to error calculation unit and carry out error calculating.
The output terminal of described current sampling mutual inductor is also connected with current compensation circuit.
The input current end of described interchange standard electric energy meter is also connected with current transformer, and the current feedback of current transformer output is to ac current source.
The present invention is this principle that equivalence equates by utilizing the alternating current of AC energy standard scale metering and the DC current of tested direct current energy meter metering, uses AC energy standard scale, just can complete the error checking of tested direct current energy meter, easy to use; DC current is in the current transformer sampling through being provided with band compensation before rectifying and wave-filtering, ensured to be input to direct current energy meter and obtained direct current and have high precision, and reliability is high.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram of the present invention;
Fig. 2 is the relatively schematic diagram of direct current after alternating current and rectification.
Embodiment
As shown in Figure 1, realize the device to direct current energy meter error checking with AC energy standard scale, comprise AC energy standard scale, ac current source, make the output current transformer of ac current source output transform to required current value, the current sampling mutual inductor that the electric current of output current transformer output is sampled, error calculation unit, the output current of described current sampling mutual inductor is input to AC energy standard scale, the input current of described current sampling mutual inductor is also input to tested direct current energy meter by rectification circuit, the output pulse of described AC energy standard scale and the output pulse of tested direct current energy meter output to error calculation unit and carry out error calculating, the electrical energy pulse that completes standard scale and tested table is compared.The output terminal of described current sampling mutual inductor is also connected with current compensation circuit, for overcoming the impact of exciting current on electric current no-load voltage ratio precision of sampling mutual inductor, ensures secondary current precision with self-balancing type current compensation circuit.The input current end of described interchange standard electric energy meter is also connected with current transformer, and the current feedback of current transformer output is to ac current source, for revising the current precision of ac current source output.
Ac current source is given after output current transformer, electric current is through over-sampling mutual inductor, electric current after conversion is sampled, sampling mutual inductor has current compensation circuit, to ensure the sampling precision of electric current, the electric current of sampling is input to interchange standard scale and measures, and the alternating current of current transformer output is simultaneously through two half-wave rectifying circuit rectifications, become DC current, DC current is given tested direct current energy meter and is measured.Because alternating current and DC current are by rectifying conversion, so the alternating current of interchange standard scale metering and the DC current of tested direct current energy meter metering are that equivalence equates, to be converted into energy value with direct current energy meter be also the same to AC energy meter like this, so just finally completes to utilize to exchange the error checking of standard scale to direct current energy meter.
A kind of AC energy standard scale of using of the present invention is realized the method to direct current energy meter error checking, alternating current is input to interchange standard scale, alternating current is input to tested direct current energy meter after overcommutation becomes DC current, the effective value that utilizes the DC current of the input AC electric current of AC energy standard scale and the input of tested direct current energy meter is equivalent principle, and realization is carried out error checking with AC energy standard scale to direct current energy meter.
Concrete principle is as follows: the definition of effective value: the square root of the mean value of integration square in one-period of each instantaneous value, is expressed as
Be I1 if establish DC current effective value, AC value is I2, according to the definition of effective value, electric current after alternating current and AC rectification should equate, the DC current that the value of as shown in Figure 2, the alternating current on the left side being given to AC energy standard scale metering equals the right is given the value of tested direct current energy meter metering.The present invention realizes and utilizes the error checking of AC energy standard scale to direct current energy meter according to this principle.
Claims (4)
1. realize the method for direct current energy meter error checking with AC energy standard scale for one kind, it is characterized in that: alternating current is input to AC energy standard scale, alternating current is input to tested direct current energy meter after overcommutation becomes DC current, the output signal of AC energy standard scale and the output signal of tested direct current energy meter are input to error calculation unit, the effective value that utilizes the input AC electric current of AC energy standard scale and the input direct-current electric current of tested direct current energy meter is equivalent principle, and realization is carried out error checking with AC energy standard scale to direct current energy meter.
2. realize the use AC energy standard scale of method as claimed in claim 1 and realize the device of direct current energy meter error checking for one kind, it is characterized in that: comprise AC energy standard scale, ac current source, make the output current transformer of ac current source output transform to required current value, the current sampling mutual inductor that the electric current of output current transformer output is sampled, error calculation unit, the output current of described current sampling mutual inductor is input to AC energy standard scale, the input current of described current sampling mutual inductor is also input to tested direct current energy meter by current rectifying and wave filtering circuit, the output pulse of described AC energy standard scale and the output pulse of tested direct current energy meter output to error calculation unit and carry out error calculating.
3. the AC energy standard scale of using according to claim 2 is realized the device to direct current energy meter error checking, it is characterized in that: the output terminal of described current sampling mutual inductor is also connected with current compensation circuit.
4. the AC energy standard scale of using according to claim 3 is realized the device to direct current energy meter error checking, it is characterized in that: the input current end of described interchange standard electric energy meter is also connected with current transformer, the current feedback of current transformer output is to ac current source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210372453.8A CN102879760B (en) | 2012-09-29 | 2012-09-29 | Method and device for checking errors of direct current electric energy meter by using standard alternating current electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210372453.8A CN102879760B (en) | 2012-09-29 | 2012-09-29 | Method and device for checking errors of direct current electric energy meter by using standard alternating current electric energy meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102879760A CN102879760A (en) | 2013-01-16 |
| CN102879760B true CN102879760B (en) | 2014-09-17 |
Family
ID=47481156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210372453.8A Active CN102879760B (en) | 2012-09-29 | 2012-09-29 | Method and device for checking errors of direct current electric energy meter by using standard alternating current electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102879760B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103995247A (en) * | 2014-05-28 | 2014-08-20 | 国家电网公司 | Electric energy meter calibrating apparatus for anechoic chamber |
| CN104749547A (en) * | 2015-03-12 | 2015-07-01 | 国家电网公司 | Novel on-site power meter calibration instrument |
| CN113655304B (en) * | 2021-07-13 | 2024-03-22 | 国网浙江省电力有限公司营销服务中心 | System and method for online detection of metering performance of electric vehicle charger |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3849727A (en) * | 1973-08-10 | 1974-11-19 | Canadian Patents Dev | Current comparator for power and energy measurements |
| CN87201768U (en) * | 1987-02-05 | 1987-12-26 | 牡丹江市测试仪器厂 | Portable test unit for ac/dc electric meters |
| CN201859213U (en) * | 2010-11-11 | 2011-06-08 | 陕西电力科学研究院 | Intelligent energy meter verifying device |
| CN102253357A (en) * | 2011-04-01 | 2011-11-23 | 青岛乾程电子科技有限公司 | Pulse collector for mass watt-hour meter |
-
2012
- 2012-09-29 CN CN201210372453.8A patent/CN102879760B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3849727A (en) * | 1973-08-10 | 1974-11-19 | Canadian Patents Dev | Current comparator for power and energy measurements |
| CN87201768U (en) * | 1987-02-05 | 1987-12-26 | 牡丹江市测试仪器厂 | Portable test unit for ac/dc electric meters |
| CN201859213U (en) * | 2010-11-11 | 2011-06-08 | 陕西电力科学研究院 | Intelligent energy meter verifying device |
| CN102253357A (en) * | 2011-04-01 | 2011-11-23 | 青岛乾程电子科技有限公司 | Pulse collector for mass watt-hour meter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102879760A (en) | 2013-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202758062U (en) | Overall metering error detection system of digital transformer station electric energy metering device | |
| GB201320625D0 (en) | Field integral detecting system of three-phase electric energy measuring system of electric distribution network | |
| CN101806876A (en) | Electronic type transformer checking system | |
| CN202886584U (en) | Novel integrated error checking device of high-voltage energy measurement device | |
| CN104062625A (en) | Digital electric energy metering device calibration equipment and method thereof | |
| CN203930043U (en) | A kind of digitalized electric energy measuring apparatus correcting device | |
| CN204945357U (en) | A kind of electronic mutual inductor steady state error measuring means | |
| CN203658570U (en) | Portable calibrating device for digital electric energy metering device | |
| CN203054211U (en) | Apparatus for realizing DC electric energy meter error verification by using AC electric energy standard meter | |
| AU2011371437A1 (en) | Electric energy meter on-line detection method | |
| CN106054110A (en) | Intelligent electric energy meter harmonic influence testing method | |
| CN102879760B (en) | Method and device for checking errors of direct current electric energy meter by using standard alternating current electric energy meter | |
| CN103605038A (en) | Protective error detecting and verifying system of electronic current transformer | |
| CN103675751A (en) | Three-phase voltage and current analog power source for site metering device | |
| CN202563077U (en) | Detector for electric energy metering apparatus | |
| CN204241579U (en) | Portable type current transformer on-site calibrator | |
| CN202502134U (en) | Secondary voltage drop detection device for voltage transformer | |
| CN105044641A (en) | Electric vehicle charging metering instrument field calibration device | |
| CN104101856A (en) | Method and device for detecting error of electronic measurement unit of zero-flux DC (Direct Current) current transformer | |
| CN203747682U (en) | Device of single-phase AC-DC conversion power supply | |
| CN203981796U (en) | The transmission line power frequency parameter test instrument that the anti-high induction voltage of electronic type disturbs | |
| CN102621519A (en) | Tester for electric energy metering device | |
| CN203759067U (en) | High stability alternating current standard voltage boosting system | |
| CN102866378A (en) | Voltage or current transformer on-line test device and voltage or current transformer on-line test method | |
| CN203606483U (en) | Three-phase voltage current simulation power supply used for on-site metering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |