CN113030838B - Electric energy meter calibrating device for on-line on-load calibration - Google Patents
Electric energy meter calibrating device for on-line on-load calibration Download PDFInfo
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- CN113030838B CN113030838B CN202110321474.6A CN202110321474A CN113030838B CN 113030838 B CN113030838 B CN 113030838B CN 202110321474 A CN202110321474 A CN 202110321474A CN 113030838 B CN113030838 B CN 113030838B
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- 238000009434 installation Methods 0.000 claims abstract description 24
- 238000007405 data analysis Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims abstract description 3
- 238000012795 verification Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims 2
- 238000001514 detection method Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 210000000080 chela (arthropods) Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
Abstract
The invention discloses an electric energy meter calibrating device for online on-load calibration, which comprises an installation type standard electric energy meter, a measured installation type electric energy meter, a temperature and humidity transmitter, a current clamp and a data analysis main control platform; the device comprises a tested installed electric energy meter, a standard electric energy meter, a load, a current clamp, a current signal receiving end and a power supply, wherein the tested installed electric energy meter and the standard electric energy meter are connected in parallel with a mains supply interface, the tested installed electric energy meter is connected with the load through a measurement port, the detection end of the current clamp is connected between the load and the tested installed electric energy meter, and the signal output end of the current clamp transmits collected information to the current signal receiving end of the standard electric energy meter; the installation type standard electric energy meter is connected with the temperature and humidity transmitter through a communication interface, is connected with a power supply end of the temperature and humidity transmitter through a self-set power interface, and is wirelessly connected with the data analysis main control platform through a wireless transmission port; the temperature and humidity transmitter is arranged beside the measured installation type electric energy meter; the device can accurately detect the working site environment of the electric energy meter and analyze the influence of the environment on the error of the electric energy meter, and determine whether the variation of the error influenced by the temperature meets the requirements of relevant standards.
Description
Technical Field
The invention relates to the technical field of online on-load verification of an electric energy meter in use, in particular to an electric energy meter online verification device subjected to temperature influence error change.
Background
Currently, the calibration of the metering accuracy of the electric energy meter is carried out by periodically (6 months or 1 year) dismantling the electric energy meter to a laboratory for calibration or using an expensive portable electric energy meter calibrator for field calibration. Firstly, the method is the most conventional detection mode for detaching the electric energy meter from the laboratory, the electric energy meter is required to be detached from the laboratory and returned to the site after being qualified by the laboratory, the disassembly and the assembly are implemented under the condition of power failure, the benefit of the user is sacrificed, the cost of service units is consumed, and meanwhile, the workload is huge, and the electric energy meter which is separated from the post line cannot truly reflect the real working state of the electric energy meter; and a large number of electric energy meters are purchased as standby meters, so that the cost is high. Secondly, the expensive portable electric energy meter calibrator is used for field detection, and the complexity of the use place and the instability of the use environment of the calibrator affect the calibration result of the calibrator, and meanwhile, the expensive portable calibrator is easy to damage from the outside and has certain economic loss in modeling. The two methods bring inconvenience to users, and uninterrupted real-time online detection cannot be achieved. Therefore, online verification of the non-dismantling representation field is required to be realized, so that verification efficiency is improved, repeated disassembly and assembly are reduced, and cost is saved.
And the electric energy meter in use is disassembled back to a laboratory for verification according to the traditional verification method, so that whether the electric energy meter is qualified in the actual use process cannot be completely ensured. Due to the problem of error accuracy of the electric energy meter, the electric energy meter is influenced by external factors such as working environment, temperature, vibration, electromagnetic interference and the like. The method can accurately verify the real condition of the electric energy meter in use, accurately verify the working site environment of the electric energy meter and analyze the influence of the environment on the error of the electric energy meter, and determine whether the variation of the error influenced by temperature meets the requirement of relevant standard or not as one of the conditions for judging whether the electric energy meter works normally.
Disclosure of Invention
The invention aims to provide an on-line on-load verification electric energy meter verification device (the device comprises an installation type standard electric energy meter, a temperature and humidity transmitter, a current clamp and a data analysis main control platform), which can accurately verify the working site environment of the electric energy meter and analyze the influence of the environment on the error of the electric energy meter, and determine whether the variation of the error influenced by temperature meets the requirements of related standards.
The invention adopts the technical scheme that:
the invention has the beneficial effects that the temperature and humidity transmitter is connected to the installed standard electric energy meter by upgrading and reforming the installed standard electric energy meter, the temperature and humidity transmitter is placed near the installed electric energy meter to be tested, the temperature and humidity conditions around the installed electric energy meter to be tested are collected in real time, the installed standard electric energy meter performs primary processing on the temperature and humidity conditions, and then information is sent to the data analysis main control platform through the Bluetooth module or the wireless communication module; meanwhile, the circuit current condition of the tested installed electric energy meter under the working state is collected by using the current clamp, then the current data information is sent to the installed standard electric energy meter, the installed standard electric energy meter analyzes the pulse errors, then the analysis result is sent to the data analysis main control platform through the Bluetooth module or the wireless communication module, and the data analysis main control platform calculates and processes the received temperature and humidity information and the pulse errors according to relevant standards, so that the electric energy meter in use under different working condition environments is subjected to error detection and temperature influence error analysis.
Drawings
FIG. 1 is a schematic block diagram of a circuit of the present invention;
FIG. 2 is a schematic diagram of the structure of the current clamp of the present invention;
FIG. 3 is a schematic diagram of a left-hand cross-sectional structure of the current clamp of the present invention;
FIG. 4 is a schematic view of a partial enlarged structure of the current clamp of the present invention at A in FIG. 2;
FIG. 5 is a schematic view of a partially enlarged structure of the current clamp of the present invention at B in FIG. 2;
fig. 6 is a schematic view of a partial enlarged structure of the current clamp of the present invention at C in fig. 2.
In the figure: 1. a fixed block; 2. a first semicircular body; 3. a first briquette; 4. a first fixed ear; 5. a second semicircular body; 6. a tension spring; 7. a connecting rod; 8. a second fixed ear; 9. a connecting plate; 10. a third fixed ear; 11. a push-pull rod; 12. a second briquetting; 13. a first slide plate; 14. a first screw; 15. a second slide plate; 16. a compression spring; 17. a first rotating shaft; 18. a square block; 19. a second rotating shaft; 20. a round tube; 21. a solenoid; 22. a swivel; 23. a circular ring; 24. a fixing plate; 25. a telescopic rod; 26. a second screw; 27. a connecting block; 28. an anti-skid sleeve; 29. a rotating handle; 30. protection pad, 31, wire.
Detailed Description
As shown in FIG. 1, the invention comprises an installation type standard electric energy meter, a measured installation type electric energy meter, a temperature and humidity transmitter, a current clamp and a data analysis main control platform; the measured installation type electric energy meter and the installation type standard electric energy meter are connected in parallel with a mains supply interface, the measured installation type electric energy meter is connected with a load through a measuring port, a detecting end of the current clamp is connected with a circuit between the load and the measured installation type electric energy meter, the current signal receiving end is used for receiving the current information of the current clamp, and the current signal receiving end is used for receiving the current information of the current clamp; the wireless transmission port of the installed standard electric energy meter is connected with the data analysis main control platform in a wireless mode; the temperature and humidity transmitter is arranged beside the measured installation type electric energy meter.
The installation type standard electric energy meter is internally provided with a Bluetooth module, a wireless communication module, a measurement module, a power module, a communication module and a micro-processing module. The Bluetooth module and the wireless communication module are used for uploading detection data of the installed standard electric energy meter to the data analysis main control platform; the measuring module is used for measuring pulse errors on a load circuit of the measured installation type electric energy meter through the current clamp; the power supply module is used for providing stable 5V voltage for the temperature and humidity transmitter; the communication module adopts an RS485 communication interface and is used for transmitting acquired temperature and humidity information data for the installed standard electric energy meter by the temperature and humidity transmitter; the micro-processing module is mainly used for calculating and processing the pulse errors according to the relevant standards.
The data analysis main control platform comprises a PC, a notebook computer and matched analysis software. And judging whether the error of the measured installation type electric energy meter affected by the temperature is qualified or not through data analysis according to the detection result. The error qualification of the electric energy meter affected by temperature in use is required to be within the national standard allowable range of the nominal accuracy level.
As shown in fig. 2-6, the current clamp comprises a fixed block 1, a first semicircular device body 2 is embedded and mounted at the top end of the fixed block 1, a first pressing block 3 is fixedly connected to the upper side of the inside of the first semicircular device body 2, an adjusting cavity is arranged at the left side of the top end of the fixed block 1, a second semicircular device body 5 is rotatably connected to the inside of the adjusting cavity through a first fixed lug 4, the top end of the push-pull rod 11 is sleeved on the outer side of a bus through the first semicircular device body 2 and the second semicircular device body 5 and measures the bus, a tension spring 6 is connected to the front side of the bottom end of the second semicircular device body 5, the bottom end of the tension spring 6 is fixedly connected with the front side of the bottom end of the adjusting cavity, a connecting rod 7 is fixedly connected with a second fixed lug 8, a connecting plate 9 is rotatably connected to the bottom end of the connecting rod 7, a third fixed lug 10 is rotatably connected to the bottom end of the connecting plate 9, a rod 11 is rotatably connected to the left side of the inside of the fixed block 1, the top end of the push-pull rod 11 is extended to the inside of the adjusting cavity, the top end of the rod 11 is fixedly connected with the bottom end of the third fixed lug 10, a second semicircular device body 2 is fixedly connected with the bottom end of the second semicircular device body 12, a wire guide wire is connected with the second semicircular device 12 and the bottom end of the second semicircular device 12 is fixedly connected with the bottom end of the second semicircular device 12, and the second pressing block is provided with a standard wire receiving end of the electric energy meter 31; the first pressing block and the second pressing block form an induction clamp; the right side on the top of fixed block 1 is provided with first spout, the inside slip of first spout is provided with first slide 13, the bottom fixed connection of top and second briquetting 12 of first slide 13 is provided with first screw hole, the inside threaded connection of first screw hole has first screw rod 14, the inside of fixed block 1 is located the downside of first spout and is provided with the cavity, the bottom of first screw rod 14 extends to the inside of cavity, first screw rod 14 is connected with fixed block 1 rotation, the bottom of first screw rod 14 is provided with the second spout, the inside slip of second spout is provided with second slide 15, the bottom fixedly connected with compression spring 16 of second slide 15, the bottom fixedly connected with first pivot 17 of second slide 15, the bottom of first pivot 17 extends to the below of first screw rod 14, the bottom fixedly connected with square 18 of first pivot 17, square 18 and square groove looks adaptation, the bottom fixedly connected with second pivot 19 of square 18, the bottom of cavity is provided with the second screw hole, the bottom of second screw hole is provided with the inside of cavity, the bottom of second screw rod 14 is provided with the second spout, the inside slip is provided with second slide 15, the bottom of second slide 20 is connected with the inside spin-in groove 20, the inside of second slide 15 is provided with the side of spin-in the inside of second slide 15, the spin-in the spin-down sleeve is connected with the inside of second slide 20, the inside spin-in the spin-down sleeve is connected with the inside of spin-down sleeve 20, the spin-down sleeve is connected with the spin-down sleeve, the inside of spin-down device is connected with the spin-down.
It should be further noted that, the stretching mechanism includes telescopic link 25, the top fixedly connected with second screw rod 26 of telescopic link 25, the bottom fixedly connected with connecting block 27 of second pivot 19, the bottom of connecting block 27 is provided with the third screw hole, second screw rod 26 spiral shell dress is in the inside of third screw hole, be convenient for with telescopic link 25 and second pivot 19 fixed connection through the inside of second screw rod 26 spiral shell dress in the third screw hole, be convenient for adjust the height of current clamp, the outside cover of the bottom of telescopic link 25 is equipped with antiskid cover 28, play skid-proof effect, increase the frictional force between telescopic link 25 and the people's hand, the outside fixedly connected with turning handle 29 of connecting block 27, be convenient for rotate connecting block 27 through turning handle 29, second pivot 19, first pivot 17 and first screw rod 14, be convenient for fix the current clamp on the measurement busbar of low, the inside of two semicircle grooves is all fixedly connected with protection pad 30, play the effect of protecting the busbar.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Before verification, the current clamp is clamped on a circuit wire between a load and a tested installed electric energy meter, and the installation method is as follows:
the telescopic rod 25 is rotationally connected with the second rotating shaft 19 through the cooperation of the second screw rod 26 and the third threaded hole, the height of the fixed block 1 is adjusted through the telescopic rod 25, the first semicircular body 2 and the second semicircular body 5 are separated through the action of the extension spring 6, then the telescopic rod 25 is pulled down, the bus bar is embedded between the first semicircular body 2 and the second semicircular body 5 through the notch, the bus bar is clamped in the semicircular groove on the first pressing block 3, then the telescopic rod 25 is pulled downwards, meanwhile, the telescopic rod 25 is forced to pull the square 18, the round tube 20, the fixed plate 24 and the push-pull rod 11 to synchronously move downwards through the external force, the second semicircular body 5 is rotated anticlockwise through the action of the connecting plate 9 and the connecting rod 7, when the screw tube 21 moves downwards to the position of the second threaded hole, the telescopic rod 25 is rotated, the screw tube 21 is screwed in the second threaded hole, the first semicircular body 2 is contacted with the second semicircular body 5, and the notch of the second semicircular body 5 and the first semicircular body 2 is closed. Then upwards promote telescopic link 25 and make square 18 move to the upside of square groove, then rotate telescopic link 25 and make second pivot 19, first pivot 17 and first screw rod 14 rotate, make first slide 13 upwards move, broken make first clamp plate and second clamp plate compress tightly fixedly the generating line to be convenient for measure the generating line, be convenient for make the reliable embracing of current pincers press on the generating line, improved the stability of current pincers. An iron core and a coil are arranged in the first pressing plate and the second pressing plate, an induction clamp is formed after the first pressing plate and the second pressing plate are closed, and current induction measurement is carried out on a bus.
After equipment is installed, the device is electrified, the environment numerical value detected by the temperature and humidity transmitter is directly read after the installation type standard electric energy meter is electrified, when the installation type standard electric energy meter is used for detecting the installation type electric energy meter field to be detected in use, the temperature and humidity parameters of the experimental environment and other detection data are transmitted to the data analysis main control platform in a Bluetooth or WI-FI communication mode, and the data analysis main control platform compares the temperature detected on site with the temperature under the reference condition according to the temperature detected on site, so that whether the error of the electric energy meter affected by the temperature in site operation meets the related standard requirement is analyzed. Therefore, error detection and temperature influence error analysis are carried out on the electric energy meter in use under different working condition environments.
Because the error of the electric energy meter in use in actual detection changes along with the temperature rise and fall, in actual measurement, a plurality of relatively stable temperature values of high, medium and low can be selected for multiple detection according to the working environment of the measured installation type electric energy meter, and whether the error variation of the electric energy meter after being influenced by the temperature is qualified is calculated and judged through a data analysis main control platform.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the technical solutions according to the embodiments of the present invention.
Claims (3)
1. An electric energy meter calibrating device of on-line on-load verification, which is characterized in that: the device comprises an installation type standard electric energy meter, a measured installation type electric energy meter, a temperature and humidity transmitter, a current clamp and a data analysis main control platform; the device comprises a power supply interface, a current clamp, a current signal receiving end, a current signal output end and a power supply interface, wherein the power supply interface is connected with the power supply interface in parallel; the wireless transmission port of the installed standard electric energy meter is connected with the data analysis main control platform in a wireless mode; the temperature and humidity transmitter is arranged beside the measured installation type electric energy meter;
the current clamp comprises a fixed block, a first semicircle device body is embedded and mounted at the top end of the fixed block, a first pressing block is fixedly connected to the upper side of the inside of the first semicircle device body, an adjusting cavity is formed in the left side of the top end of the fixed block, a second semicircle device body is rotatably connected to the inside of the adjusting cavity through a first fixing lug, a tension spring is connected to the front side of the bottom end of the second semicircle device body, the bottom end of the tension spring is fixedly connected with the front side of the bottom end of the adjusting cavity, a connecting rod is connected to the bottom end of the rear end of the first fixing lug, a second fixing lug is fixedly connected to the bottom end of the connecting rod, a connecting plate is rotatably connected to the bottom end of the connecting plate, a push-pull rod is rotatably connected to the left side of the inside of the fixed block, the top end of the push-pull rod is fixedly connected with the bottom end of the third fixing lug, the bottom ends of the first semicircle device body and the inside of the second semicircle device body are provided with second pressing blocks, semicircular grooves are respectively formed in the top ends of the second pressing blocks and the bottom ends of the first pressing blocks, and the other ends of the second pressing blocks are connected with conducting wires, and the conducting wires are connected to the standard receiving ends of the electric energy meter; the first pressing block and the second pressing block form an induction clamp; the right side at the top of the fixed block is provided with a first sliding groove, the inside of the first sliding groove is provided with a first sliding plate in a sliding manner, the top of the first sliding plate is fixedly connected with the bottom end of a second pressing block, the bottom end of the first sliding plate is provided with a first threaded hole, the inside of the first threaded hole is connected with a first screw rod in a threaded manner, the inside of the fixed block is provided with a cavity at the lower side of the first sliding groove, the bottom end of the first screw rod extends to the inside of the cavity, the first screw rod is rotationally connected with the fixed block, the bottom end of the first screw rod is provided with a second sliding groove, the inside of the second sliding groove is provided with a second sliding plate, the bottom end of the second sliding plate is fixedly connected with a compression spring, the bottom end of the second sliding plate is fixedly connected with a first rotating shaft, the bottom end of the first rotating shaft extends to the lower side of the first screw rod, the bottom end of the first rotating shaft is fixedly connected with a square block, the bottom end of the square block is fixedly connected with a second rotating shaft, the bottom end of the square block is provided with a circular groove, the inside of the circular groove is rotationally connected with a circular tube, the inner side wall of the circular tube is rotationally connected with a rotating ring, the top end of the circular tube is rotationally connected with a rotating ring is provided with a rotating shaft, and the rotating ring is fixedly connected with the rotating ring, and the rotating ring is connected with the rotating ring;
the stretching mechanism comprises a telescopic rod, the top end of the telescopic rod is fixedly connected with a second screw rod, the bottom end of the second rotating shaft is fixedly connected with a connecting block, the bottom end of the connecting block is provided with a third threaded hole, and the second screw rod is screwed in the third threaded hole;
the outer side of the connecting block is fixedly connected with a rotating handle;
the second sliding plate is of a square structure.
2. The on-line load-tested electrical energy meter testing device of claim 1, wherein: the installation type standard electric energy meter is internally provided with a Bluetooth module, a wireless communication module, a measurement module, a power module, a communication module and a micro-processing module.
3. The on-line load-tested electrical energy meter testing device of claim 1, wherein: the inside of two semicircle grooves is all fixedly connected with protection pad.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110321474.6A CN113030838B (en) | 2021-03-25 | 2021-03-25 | Electric energy meter calibrating device for on-line on-load calibration |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110321474.6A CN113030838B (en) | 2021-03-25 | 2021-03-25 | Electric energy meter calibrating device for on-line on-load calibration |
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| CN113030838A CN113030838A (en) | 2021-06-25 |
| CN113030838B true CN113030838B (en) | 2024-02-02 |
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Address after: No.21, Jinshui Garden Road, Zhengzhou City, Henan Province 450008 Patentee after: Henan Institute of Metrology and Testing Science Country or region after: China Address before: No.21, Jinshui Garden Road, Zhengzhou City, Henan Province 450008 Patentee before: HENAN PROVINCE INSTITUTE OF METROLOGY Country or region before: China |