CN204129201U - A kind of high-voltage electric energy measurement equipment error pick-up unit - Google Patents
A kind of high-voltage electric energy measurement equipment error pick-up unit Download PDFInfo
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- CN204129201U CN204129201U CN201420433430.8U CN201420433430U CN204129201U CN 204129201 U CN204129201 U CN 204129201U CN 201420433430 U CN201420433430 U CN 201420433430U CN 204129201 U CN204129201 U CN 204129201U
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Abstract
A kind of high-voltage electric energy measurement equipment error pick-up unit, this device comprises using lower part: A, high-voltage great-current experiment power supply (1) are as providing stable and reliable high-voltage great-current test signal, and it directly connects high-voltage electric energy measurement equipment and benchmark electric energy measurement unit by the mode of phase three-wire three two elements method; B, benchmark electric energy measurement unit (2), as the core comparison part of pick-up unit, are detected high-voltage electric energy measurement equipment by relative method; C, compare display instrument (3) and show as the impulse response of high-voltage electric energy measurement equipment is carried out calculating comparison.The utility model reduces load, reduces power attenuation, reduces all to some extent on volume He in weight, meets the requirement of field-checking convenience.
Description
Technical field
The utility model belongs to high-voltage electric energy measurement field, relates to a kind of high-voltage electric energy measurement equipment error structure of the detecting device technical field.
Background technology
10kV/35kV high-voltage electric energy measurement equipment is important electric energy measuring equipment, particularly network interface electric energy measuring equipment, it mainly comprises voltage transformer (VT), current transformer and low-voltage Watt-hour meter, and for a long time, the subject matter that it exists to carry out overall measurement verification and calibration.Current routine mode is the accuracy that the comprehensive method of use error carrys out this metering outfit of specification, verification for high-voltage power metering equipment also can only adopt voltage transformer (VT) on-site calibrator, current mutual inductor on site tester, electric energy meter on-site calibrator and secondary pressure drop tester to verify the various piece of metering outfit respectively, obtain voltage transformer (VT), current transformer and the error of electric energy meter each several part and the influence amount of voltage transformer secondary voltage drop, then calculated the overall precision of high-voltage electric energy measurement equipment by comprehensive error computation.Such as highest ranking is the current transformer of the high-voltage electric energy measurement equipment use 0.2 grade of A.E 1, and the accuracy of the electric energy high-voltage electric energy measurement equipment of the electric energy meter composition of the voltage transformer (VT) of 0.2 grade and 0.2 grade is composition error 0.7%.Cardinal rule according to International Electrotechnical Commission (IEC) specifies about electric energy and calibrator for watt-hour meter: " error of all instrument and measurement mechanism all must carry out actual measurement; without measurement; be only error that is that calculate in measuring with other or that quote the combination of voltage, electric current and power factor; can not as the foundation of evaluating apparatus fundamental error ", so the composition error of 0.7% of above-mentioned high-voltage electric energy measurement equipment can not be used for the accuracy evaluating high-voltage electric energy measurement equipment.
Because technical reason does not also have a kind of equipment can realize examining and determine the entirety of high-voltage electric energy measurement equipment and calibrating so far, according to a kind of measurement instrument not having accuracy index or its accuracy index not to have maybe can not implement objective measurement verification of the measurement Law of China, its metric results can not as the foundation of charging to user, so electric energy measuring equipment verifying attachment becomes the important blank that electric energy metrical field exists for a long time.On the other hand, use the induction type electric energy meter of more than 100 year, realize be electric current (typical ratings is 5A) with voltage (typical ratings is 220V, 100V) ratio that obtains that is multiplied in the power of its aluminium dish rotating speed, by aluminium dish revolution carry out add up just can obtain electric energy meter degree.The expansion of its range then relies on Current Transmit and voltage transformer pt, and thus form one with induction type electric energy meter is core, the electric energy metrical that Current Transmit and voltage transformer pt are supporting with it and electric network measuring and controlling technical system.To the eighties in last century, due to the high speed development of scientific-technical progress and IT industry, there is the digital electronic electric energy meter based on A/D technology, and define the trend replacing induction type electric energy meter very soon, it instead of induction type table completely high-end at present, it is also very fast that product low side replaces induction type watch progress, the electronic watch of current new production oneself exceed induction type table.What electronic electric energy meter realized is voltage and being multiplied of voltage, the voltage signal of corresponding technical system should to be current/voltage (I/V) transducer and voltage/voltage (V/V) transducer by input current and voltage transitions be A/D level match, typical ratings is 1V, 2V.If but continue to continue to use original voltage transformer pt, Current Transmit system, obtained the voltage of A/D level again by sampling resistor and voltage divider on the basis of 5A, 100V, not only add the complicacy of technology, add cost, and affect the accuracy of measuring and technical progress.
Summary of the invention
In order to the error amount of high-voltage electric energy measurement equipment accurately can be obtained, the utility model provides a kind of high-voltage electric energy measurement equipment error pick-up unit, this device not only achieves the entirety verification of electric energy measuring equipment, high pressure dosing apparatus is made to be provided with overall measuring accuracy, the complicated processes of electric energy meter, mutual inductor, secondary circuit is detected respectively under avoiding traditional approach, thus substantially increase verifying work efficiency, by reducing the volume and weight of this device, the requirement of field-checking convenience can also be met.
To achieve these goals, a kind of high-voltage electric energy measurement equipment error pick-up unit of the present utility model, this device comprises with lower part:
A, high-voltage great-current experiment power supply are as providing stable and reliable high-voltage great-current test signal, and it directly connects high-voltage electric energy measurement equipment and benchmark electric energy measurement unit by the mode of phase three-wire three two elements method;
B, benchmark electric energy measurement unit, as the core comparison part of pick-up unit, are detected high-voltage electric energy measurement equipment by relative method;
C, compare display instrument and show as the impulse response of high-voltage electric energy measurement equipment is carried out calculating comparison.
Further, described high-voltage great-current experiment power supply includes low voltage voltage current signal generation device, voltage power amplifier, current power amplifier, stepup transformer, current lifting device; Described benchmark electric energy measurement unit contains standard potential transformer, standard current transformer and standard electric energy meter; High-voltage electric energy measurement equipment and benchmark electric energy measurement unit can be compared the high-voltage electric energy measurement equipment error value that obtains and show by described comparison display instrument.
Further, described low voltage voltage current signal generation device mainly comprises PC, touch-screen, industrial computer, serial server, signal source, voltage boosting current booster feedback of voltage and current control system.
Further, described voltage boosting current booster feedback of voltage and current control system mainly comprises collection standard potential transformer, standard current transformer, form secondary circuit signal and be used for backfeed loop to control the output of low voltage voltage, electric current, thus the high-voltage great-current obtained by vertification regulation requirement, output to high-voltage electric energy measurement equipment, high-voltage electric energy measurement equipment is normally worked.
High-voltage electric energy measurement equipment error pick-up unit of the present utility model, utilize high-precision mutual inductor and standard scale, form the benchmark electric energy measurement unit of accuracy class more than 0.05 grade, and detected the entirety verification achieving electric energy measuring equipment by the error of relative method to high-voltage electric energy measurement equipment.Also have passed reduction load, reduce power attenuation, reduce all to some extent on volume He in weight, meet the requirement of field-checking convenience.
Accompanying drawing explanation
Fig. 1 the utility model process flow diagram;
Fig. 2 the utility model detailed construction schematic diagram.
Embodiment
Below in conjunction with Fig. 1,2 the utility model is described in more detail:
A kind of high-voltage electric energy measurement equipment error pick-up unit, this device comprises with lower part:
A, high-voltage great-current experiment power supply 1 are as providing stable and reliable high-voltage great-current test signal, and it directly connects high-voltage electric energy measurement equipment and benchmark electric energy measurement unit by the mode of phase three-wire three two elements method;
B, benchmark electric energy measurement unit 2, as the core comparison part of pick-up unit, are detected high-voltage electric energy measurement equipment by relative method;
C, compare display instrument 3 and show as the impulse response of high-voltage electric energy measurement equipment is carried out calculating comparison.
Described high-voltage great-current experiment power supply includes low voltage voltage current signal generation device, voltage power amplifier, current power amplifier, stepup transformer, current lifting device; Described benchmark electric energy measurement unit contains standard potential transformer, standard current transformer and standard electric energy meter; High-voltage electric energy measurement equipment and benchmark electric energy measurement unit can be compared the high-voltage electric energy measurement equipment error value that obtains and show by described comparison display instrument.
Described low voltage voltage current signal generation device comprises PC1.1.1, touch-screen 1.1.2, industrial computer 1.1.3, serial server 1.1.4, signal source 1.1.5, voltage boosting current booster feedback of voltage and current control system 1.1.6.
Described voltage boosting current booster feedback of voltage and current control system 1.1.6 comprises collection standard potential transformer, standard current transformer, form secondary circuit signal and be used for backfeed loop to control the output of low voltage voltage, electric current, thus the high-voltage great-current obtained by vertification regulation requirement, output to high-voltage electric energy measurement equipment, high-voltage electric energy measurement equipment is normally worked.
Display instrument 3, high-voltage great-current experiment power supply 1, benchmark electric energy measurement unit 2 is compared as Fig. 1 high-voltage electric energy measurement equipment error pick-up unit comprises.Produce two equivalent high-voltage great-current signals by high-voltage great-current experiment power supply and pass to tested high-tension apparatus and benchmark electric energy measurement unit 2 respectively.The pulse signal produced by tested high-tension apparatus and benchmark electric energy measurement unit 2 reaches and compares display instrument 3 and compare the error amount drawing tested high-tension apparatus.
Claims (4)
1. a high-voltage electric energy measurement equipment error pick-up unit, is characterized in that, this device comprises with lower part:
A, high-voltage great-current experiment power supply (1) are as providing stable and reliable high-voltage great-current test signal, and it directly connects high-voltage electric energy measurement equipment and benchmark electric energy measurement unit by the mode of phase three-wire three two elements method;
B, benchmark electric energy measurement unit (2), as the core comparison part of pick-up unit, are detected high-voltage electric energy measurement equipment by relative method;
C, compare display instrument (3) and show as the impulse response of high-voltage electric energy measurement equipment is carried out calculating comparison.
2. a kind of high-voltage electric energy measurement equipment error pick-up unit as claimed in claim 1, it is characterized in that, described high-voltage great-current experiment power supply includes low voltage voltage current signal generation device, voltage power amplifier, current power amplifier, stepup transformer, current lifting device; Described benchmark electric energy measurement unit contains standard potential transformer, standard current transformer and standard electric energy meter; High-voltage electric energy measurement equipment and benchmark electric energy measurement unit can be compared the high-voltage electric energy measurement equipment error value that obtains and show by described comparison display instrument.
3. a kind of high-voltage electric energy measurement equipment error pick-up unit as claimed in claim 2, it is characterized in that, described low voltage voltage current signal generation device comprises PC (1.1.1), touch-screen (1.1.2), industrial computer (1.1.3), serial server (1.1.4), signal source (1.1.5), voltage boosting current booster feedback of voltage and current control system (1.1.6).
4. a kind of high-voltage electric energy measurement equipment error pick-up unit as claimed in claim 3, it is characterized in that, described voltage boosting current booster feedback of voltage and current control system (1.1.6) comprises collection standard potential transformer, standard current transformer, form secondary circuit signal and be used for backfeed loop to control the output of low voltage voltage, electric current, thus the high-voltage great-current obtained by vertification regulation requirement, output to high-voltage electric energy measurement equipment, high-voltage electric energy measurement equipment is normally worked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420433430.8U CN204129201U (en) | 2014-08-01 | 2014-08-01 | A kind of high-voltage electric energy measurement equipment error pick-up unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420433430.8U CN204129201U (en) | 2014-08-01 | 2014-08-01 | A kind of high-voltage electric energy measurement equipment error pick-up unit |
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| CN204129201U true CN204129201U (en) | 2015-01-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501758A (en) * | 2016-12-02 | 2017-03-15 | 国网四川省电力公司电力科学研究院 | A kind of electric power meter metering performance Compare System and method |
| CN109991515A (en) * | 2019-04-09 | 2019-07-09 | 国网四川省电力公司电力科学研究院 | The method and system of a high current are obtained under a kind of low actual load |
| CN111323741A (en) * | 2020-04-13 | 2020-06-23 | 湖南省计量检测研究院 | Indirect access type direct current electric energy meter calibrating device and method |
-
2014
- 2014-08-01 CN CN201420433430.8U patent/CN204129201U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501758A (en) * | 2016-12-02 | 2017-03-15 | 国网四川省电力公司电力科学研究院 | A kind of electric power meter metering performance Compare System and method |
| CN109991515A (en) * | 2019-04-09 | 2019-07-09 | 国网四川省电力公司电力科学研究院 | The method and system of a high current are obtained under a kind of low actual load |
| CN111323741A (en) * | 2020-04-13 | 2020-06-23 | 湖南省计量检测研究院 | Indirect access type direct current electric energy meter calibrating device and method |
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