CN105223536B - A kind of portable electric meter field calibration system - Google Patents
A kind of portable electric meter field calibration system Download PDFInfo
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- CN105223536B CN105223536B CN201510660775.6A CN201510660775A CN105223536B CN 105223536 B CN105223536 B CN 105223536B CN 201510660775 A CN201510660775 A CN 201510660775A CN 105223536 B CN105223536 B CN 105223536B
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- 238000012795 verification Methods 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000010426 asphalt Substances 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 230000002452 interceptive effect Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
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Abstract
A kind of portable electric meter field calibration system, including signal gathering unit, voltage sensor is electrically connected with signal gathering unit with current sensor, collected standard voltage signal and standard current signal are transferred to signal gathering unit, verified electric energy meter is to signal gathering unit output pulse signal, signal gathering unit is electrically connected with verification platform, the pulse signal that standard voltage signal, standard current signal are sent out with verified electric energy meter is compared by verification platform, to calculate the error of verified electric energy meter.The present invention provides a kind of portable electric meter field calibration system, and voltage sensor and current sensor are all made of open type structure, so as in the case where not interfering electric system normal operation, accurately be verified to running electric energy meter.
Description
Technical field
The present invention relates to power system measuring fields, and in particular to a kind of portable electric meter field calibration system.
Background technology
The accurate metering of electric energy be power system security stable operation guarantee and electric company and user between it is fair
The guarantee of arm's length transaction, thus need to ensure the accuracy of electric energy meter, this just needs to electric energy meter regularly verify or examine
It repaiies.In the field-checking of electric energy meter, need the secondary output voltage for obtaining primary voltage mutual inductor and primary current mutual inductor and
Electric current carries out electrical energy measurement as standard signal, and then by standard electric energy metering device, and error is carried out with verified electric energy meter
It compares, calculates the error of verified electric energy meter and propose solution.Wherein, portable, high-precision voltage sensor and
Current sensor is the guarantee for obtaining accurate check results.
At present in Watt-hour meter's field test, small PT is generally used（Voltage transformer）Or resitstance voltage divider etc. carries out voltage
Conversion, by the output of primary voltage mutual inductor（100V/57.7V）Be converted to the small voltage signal of suitable electric energy meter.Small PT and electricity
Resistance divider needs to be directly accessed in circuit when measuring voltage, the normal operation of disturbing line.In current measurement, current one
As use CT（Current transformer）, CT is also required to be directly accessed in circuit.Although some current methods of calibration are using pincerlike electric current
Table is realized, but does not consider the influence that verification split shed air gap generates, and causes check results accuracy not high.
Invention content
The technical problem to be solved by the present invention is to be directed to sensor or check system in current Watt-hour meter's field test
Existing deficiency provides a kind of portable electric meter field calibration system, is used in Watt-hour meter's field test accurately and conveniently
Normal voltage current signal needed for obtaining, and then running electric energy meter is verified.
To achieve the goals above, the technical scheme is that：A kind of portable electric meter field calibration system, including
Signal gathering unit, voltage sensor are electrically connected with signal gathering unit with current sensor, by collected normal voltage
Signal and standard current signal are transferred to signal gathering unit, verified electric energy meter to signal gathering unit output pulse signal,
Signal gathering unit be electrically connected with verification platform, by verification platform by standard voltage signal, standard current signal and verified electricity
The pulse signal that energy table is sent out is compared, to calculate the error of verified electric energy meter.
Preferably, the signal gathering unit includes FPGA, the first A/D converter, the second A/D converter, level conversion
Module, pci interface, voltage sensor and current sensor are electrically connected with the first A/D converter and the second A/D converter respectively,
Then it is electrically connected with FPGA, the pulse signal of verified electric energy meter output after level switch module by passing to FPGA；FPGA
It is communicated using pci interface between verification platform.
Preferably, the voltage sensor is open type structure.
Preferably, the voltage sensor includes low-field electrode, middle piezoelectricity pole, high-field electrode, low-field electrode and middle piezoelectricity
Pole constitutes low-voltage arm capacitance, and middle piezoelectricity pole constitutes high voltage arm capacitor with high-field electrode, is used for the voltage in primary voltage conducting wire
Signal is converted to the small voltage signal of suitable signal gathering unit acquisition.
Preferably, the low-field electrode, middle piezoelectricity pole, high-field electrode are made of aluminum alloy materials, and low-field electrode is in
It is separated by side panel between piezoelectricity pole, between middle piezoelectricity pole and high-field electrode, side panel is made of epoxide resin material, is used for
It fixes and each electrode is isolated.
Preferably, the medium between the low-field electrode and middle piezoelectricity pole, between middle piezoelectricity pole and high-field electrode is air.
Preferably, the current sensor is open type structure.
Preferably, the current sensor includes iron core, measures wire turn, compensation wire turn, measures wire turn and is wound on iron core,
It compensates wire turn and is set to opening.
Preferably, the measurement wire turn is formed with compensation wire turn by the copper wire winding of a diameter of 0.2mm.
Preferably, the level switch module is made of OPA2227 operational amplifiers, to the output electricity of verified electric energy meter
Energy impulse level is converted.
The present invention relates to a kind of portable electric meter field calibration systems, have the beneficial effect that：
1, voltage sensor includes low-voltage arm capacitance and high voltage arm capacitor, and two capacitances are respectively by two electrodes and sky therein
Air dielectric is constituted, and this capacitance structure is simple, easily manufactured.
2, voltage sensor is designed as open type structure, is made of the capacitive divider of two semicirculars, and when measurement is direct
Be clipped on tested conducting wire, when verification will not disturbing line or power grid normal operation, improve the convenience of execute-in-place
Property.
3, current sensor includes to measure the parts such as wire turn and compensation wire turn, and opening gas can be reduced by compensating the presence of wire turn
Error caused by gap improves the accuracy of current sensor.Normalized current sensor is open type structure, and when measurement directly presss from both sides
It is simple to operate on tested primary current conducting wire.
4, a kind of portable electric meter field calibration system of the present invention, with small, light-weight, high certainty of measurement, absolutely
Edge simple and convenient feature can directly verify running electric energy meter without being contacted with test line when verification.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the structure diagram of information acquisition unit of the present invention；
Fig. 3 is the structural schematic diagram of voltage sensor of the present invention；
Fig. 4 is the dimensional structure diagram of voltage sensor of the present invention；
Fig. 5 is the structural schematic diagram that current sense of the present invention is ridden；
In figure：Low-field electrode 1, middle piezoelectricity pole 2, high-field electrode 3,4, conducting wires 5 of side panel, iron core 6, measure wire turn 7,
Compensate wire turn 8.
Specific implementation mode
As shown in Figure 1, a kind of portable electric meter field calibration system, including signal gathering unit, voltage sensor with
Current sensor is electrically connected with signal gathering unit, and collected standard voltage signal and standard current signal are transferred to letter
Number collecting unit, verified electric energy meter are electrically connected to signal gathering unit output pulse signal, signal gathering unit with verification platform
It connects, is compared the pulse signal that standard voltage signal, standard current signal are sent out with verified electric energy meter by verification platform,
To calculate the error of verified electric energy meter.
The verification platform is made of industrial personal computer, is installed Labview softwares thereon, is write accordingly based on Labview
Verification software.Verification platform is used to calculate the electric flux of standard electric flux and verified electric energy meter, analyzes and records verified electricity
The error of energy table.
As shown in Fig. 2, the signal gathering unit includes FPGA, the first A/D converter, the second A/D converter, level turn
Block, pci interface are changed the mold, FPGA is field programmable gate array, and voltage sensor and current sensor are converted with the first A/D respectively
Device and the electrical connection of the second A/D converter, are then electrically connected with FPGA, and the pulse signal of verified electric energy meter output is turned by level
FPGA is passed to after mold changing block；It is communicated using pci interface between FPGA and verification platform.Signal gathering unit is one
The board of pci interface can be inserted directly on the PCI slot of industrial personal computer.
As shown in figure 3, the voltage sensor is open type structure.So as to not interfere power equipment normal operation
In the case of, primary voltage signal is directly acquired, the convenience of execute-in-place is improved.
The voltage sensor includes low-field electrode 1, middle piezoelectricity pole 2, high-field electrode 3, low-field electrode 1 and middle piezoelectricity pole 2
Low-voltage arm capacitance is constituted, middle piezoelectricity pole 2 constitutes high voltage arm capacitor with high-field electrode 3, is used for the voltage in primary voltage conducting wire 5
Signal is converted to the small voltage signal of suitable signal gathering unit acquisition.Voltage sensor rated output is 4V.
As shown in figure 4, the low-field electrode 1, middle piezoelectricity pole 2, high-field electrode 3 are made of aluminum alloy materials, low tension
It is separated by side panel 4 between pole 1 and middle piezoelectricity pole 2, between middle piezoelectricity pole 2 and high-field electrode 3, side panel 4 is by epoxy resin
Material is made, for fixing and being isolated each electrode.
Medium between the low-field electrode 1 and middle piezoelectricity pole 2, between middle piezoelectricity pole 2 and high-field electrode 3 is air.It is empty
Gas is as dielectric, capacitance corresponding with electrode composition.
As shown in figure 5, the current sensor is open type structure.It is directly sandwiched in when measurement on a tested conducting wire 5 i.e.
Can, so as in the case where not interfering power equipment normal operation, directly acquire primary current signal, improve live behaviour
The convenience of work.
The current sensor includes iron core 6, measures wire turn 7, compensation wire turn 8, measures wire turn 7 and is wound on iron core 6, mends
Repay wire turn and be set to opening, when verification may because be closed it is not close due to have opening air gap, lead to test result generation error.It mends
Error existing for opening air gap can be reduced by repaying the presence of wire turn, improve the accuracy of check results.
The measurement wire turn 7 is formed with compensation wire turn 8 by the copper wire winding of a diameter of 0.2mm.
The level switch module is made of OPA2227 operational amplifiers, to the output electrical energy pulse of verified electric energy meter
Level is converted, and the level value for being suitble to the ports I/O of FPGA to receive is converted into.
Using the above structure, the present invention provides a kind of portable electric meter field calibration system, voltage sensor and electricity
Flow sensor is all made of open type structure, so as in the case where not interfering electric system normal operation, to running
Electric energy meter is accurately verified.Voltage sensor is real using the capacitive divider that circular metal electrode and air dielectric are constituted
It is existing, it is simple and reliable for structure.Normalized current sensor improves the accurate of live current measurement using the design method of compensation wire turn
Degree.The check system has the characteristics that small, light-weight, high certainty of measurement, bandwidth, insulation are simple and convenient, when verification without
It need to be contacted with test line, the normal operation of other power equipments will not be interfered, there are no needing verified electric energy meter out of service,
Improve the convenience of Watt-hour meter's field test.
Claims (4)
1. a kind of portable electric meter field calibration system, including signal gathering unit, it is characterised in that：Voltage sensor and electricity
Flow sensor is electrically connected with signal gathering unit, and collected standard voltage signal and standard current signal are transferred to signal
Collecting unit, verified electric energy meter are electrically connected to signal gathering unit output pulse signal, signal gathering unit with verification platform,
The pulse signal that standard voltage signal, standard current signal are sent out with verified electric energy meter is compared by verification platform, from
And calculate the error of verified electric energy meter；
The voltage sensor is open type structure；
The voltage sensor includes low-field electrode（1）, middle piezoelectricity pole（2）, high-field electrode（3）, low-field electrode（1）With middle piezoelectricity
Pole（2）Constitute low-voltage arm capacitance, middle piezoelectricity pole（2）With high-field electrode（3）High voltage arm capacitor is constituted, is used for primary voltage conducting wire
（5）In voltage signal be converted to the small voltage signal of suitable signal gathering unit acquisition；
The low-field electrode（1）, middle piezoelectricity pole（2）, high-field electrode（3）It is made of aluminum alloy materials, low-field electrode（1）With in
Piezoelectricity pole（2）Between, middle piezoelectricity pole（2）With high-field electrode（3）Between by side panel（4）It separates, side panel（4）By asphalt mixtures modified by epoxy resin
Fat material is made, for fixing and being isolated each electrode；
The low-field electrode（1）With middle piezoelectricity pole（2）Between, middle piezoelectricity pole（2）With high-field electrode（3）Between medium be sky
Gas；
The current sensor is open type structure；
The current sensor includes iron core（6）, measure wire turn（7）, compensation wire turn（8）, measure wire turn（7）It is wound in iron core
（6）On, compensation wire turn is set to opening.
2. a kind of portable electric meter field calibration system according to claim 1, it is characterised in that：The signal acquisition list
Member includes FPGA, the first A/D converter, the second A/D converter, level switch module, pci interface, voltage sensor and electric current
Sensor is electrically connected with the first A/D converter and the second A/D converter respectively, is then electrically connected with FPGA, verified electric energy meter
The pulse signal of output after level switch module by passing to FPGA；It is carried out using pci interface between FPGA and verification platform
Communication.
3. a kind of portable electric meter field calibration system according to claim 1, it is characterised in that：The measurement wire turn
（7）With compensation wire turn（8）It is formed by the copper wire winding of a diameter of 0.2mm.
4. a kind of portable electric meter field calibration system according to claim 2, it is characterised in that：The level conversion mould
Block is made of OPA2227 operational amplifiers, is converted to the output electrical energy pulse level of verified electric energy meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510660775.6A CN105223536B (en) | 2015-10-14 | 2015-10-14 | A kind of portable electric meter field calibration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510660775.6A CN105223536B (en) | 2015-10-14 | 2015-10-14 | A kind of portable electric meter field calibration system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105223536A CN105223536A (en) | 2016-01-06 |
| CN105223536B true CN105223536B (en) | 2018-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510660775.6A Expired - Fee Related CN105223536B (en) | 2015-10-14 | 2015-10-14 | A kind of portable electric meter field calibration system |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918799A (en) * | 2017-04-12 | 2017-07-04 | 华北电力科学研究院有限责任公司 | Electric energy meter remote checking method and system |
| 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 |
| CN112557997B (en) * | 2019-09-26 | 2023-11-03 | 深圳电蚂蚁数据技术有限公司 | Mesh-shaped electric energy sensor system convenient for error verification and error verification method |
| CN110780261B (en) * | 2019-10-31 | 2021-12-24 | 南京国电南自电网自动化有限公司 | Method and system for checking electric quantity acquisition data |
| CN112986896B (en) * | 2021-02-09 | 2023-05-02 | 南方电网数字电网研究院有限公司 | Electric energy meter test system, method and device based on graphical programming |
| CN114264890B (en) * | 2021-12-22 | 2024-05-10 | 成都高斯电子技术有限公司 | Non-contact type electric parameter measurement and verification device and method for operating power equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200962142Y (en) * | 2006-08-31 | 2007-10-17 | 武汉国测科技股份有限公司 | High-voltage power meter correction device |
| CN101980042A (en) * | 2010-10-20 | 2011-02-23 | 河南大学 | Design scheme for on-spot calibration instrument of small-sized single-phase electric energy meter |
| CN102156274B (en) * | 2011-04-22 | 2012-10-03 | 四川电力科学研究院 | Field integral detecting system of three-phase electric energy measuring system of electric distribution network |
| CN102162842B (en) * | 2011-05-25 | 2013-04-10 | 重庆市电力公司电力科学研究院 | Online check meter of high-voltage electric energy metering device |
| CN204065400U (en) * | 2014-10-10 | 2014-12-31 | 国网重庆市电力公司电力科学研究院 | High-voltage electric energy meter on-site calibrator |
| CN204964744U (en) * | 2015-10-14 | 2016-01-13 | 国家电网公司 | On --spot calibration system of portable electric energy meter |
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| CN105223536A (en) | 2016-01-06 |
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Granted publication date: 20180928 Termination date: 20191014 |