CN205157765U - Electric energy meter error calibration system - Google Patents
Electric energy meter error calibration system Download PDFInfo
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- CN205157765U CN205157765U CN201521001582.1U CN201521001582U CN205157765U CN 205157765 U CN205157765 U CN 205157765U CN 201521001582 U CN201521001582 U CN 201521001582U CN 205157765 U CN205157765 U CN 205157765U
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Abstract
The utility model discloses an electric energy meter error calibration system, including the relay switch board, the AD module of sampling, 6.4K trigger impulse collection module suspends outward, pulse capture module, first processor, second processor, two port RAM and display terminal module, wherein, multichannel signal of voltage and current inserts the relay switch board, the relay switch board is connected with the input of AD sampling module, the output of AD sampling module passes through data bus and is connected with first processor, 6.4K trigger impulse collection module suspends outward, pulse capture module all inserts first processor, while first processor passes through data bus and is connected through two port RAM and second processor, second processor is connected with display terminal module and relay switch board. The utility model discloses can carry out error checking to many 0.2 grade of gateway energy meter simultaneously, and can take notes vector diagram and the original wave form of waiting to examine the electric energy meter, work efficiency is high, the height is rateed to site utilization, and calibration system's precision can reach 0.05 grade.
Description
Technical field
The utility model relates to electric energy metrical field, is specifically related to a kind of high-voltage electric energy meter error checking system, and protection supplies, the economic interests of electricity consumption both sides.
Background technology
The core that electric energy metrical is runed as electric power enterprise, the value of electric energy is embodied by measuring apparatus.And the accuracy of electric power meter metering, directly have influence on the economic interests of confession, electricity consumption both sides.Therefore, power supply enterprise has generally carried out the cycle field-checking to electric power meter error in dipping present stage.
According to statistics, China's high-voltage electric-energy meter amount total is more than 4,000,000 (cover), and wherein 6 ~ 35kV electric pressure accounts for more than 90%.For electric energy meter error verification, generally adopt method of standard table, by standard scale compared with the energy value of electric energy meter Simultaneously test, determine the relative error of electric energy meter, if relative error is greater than the accuracy of electric energy meter, then illustrate that electric energy meter can not accurate-metering.
Because electric energy meter error producing cause is many, as excessive in: electric energy meter light running, secondary voltage drop, electric energy meter inclination, wiring error etc., and whether relative error magnitudes can only illustrate electric energy meter accurate measurement, existing field calibration system does not record the raw data that electric energy meter runs, and lacks actual directive significance to instructing electric energy meter operating maintenance.
Summary of the invention
The technical problems to be solved in the utility model is, for prior art above shortcomings, a kind of online electric energy meter error check system is provided, carry out error checking for multiple stage 0.2 grade of gate energy meter simultaneously, and vector plot and the original waveform of electric energy meter to be checked can be recorded, the precision of check system can reach 0.05 grade.
The utility model for solving the problems of the technologies described above adopted technical scheme is:
A kind of electric energy meter error check system, comprise: relay switch boards, AD sampling module, the outer down trigger pulse collection module of 6.4K, pulse capture module, dual processors module, dual port RAM and display terminal module, wherein, dual processors module comprises first processor and the second processor, plurality of voltages current signal cut-in relay switch boards, relay switch boards is connected with the input end of AD sampling module, the output terminal of AD sampling module is connected with first processor by data bus, the outer down trigger pulse collection module of 6.4K, pulse capture module all accesses first processor, first processor is connected with the second processor through dual port RAM by data bus simultaneously, second processor and display terminal model calling, second processor is also provided with switch boards control signal port simultaneously, verification pulse output end mouth, communication interface, switch boards control signal port is connected with relay switch boards, communication interface is used for the second processor and upper computer control system to communicate to connect, relay switch boards is for ensureing that electric energy meter error check system carries out error checking for 8 pieces of gate energy meters simultaneously, the outer down trigger pulse collection module of 6.4K is used for ensureing that AD sampling module has fixing sampling number within each sampling period by design phase-locked loop circuit.
The method of calibration of the utility model electric energy meter error check system, comprises the steps:
(1) the pulse capture model calling of electric energy meter error check system is by the pulse output interface of school electric energy meter;
The communication interface (485 order wire) of (2) second processors connects upper computer control system;
(3) current input terminal that three-phase voltage line parallel connects the voltage input end of tested electric energy meter and electric energy meter error check system, three-phase electricity streamline is connected in series tested electric energy meter and electric energy meter error check system;
(4) the verification number of turns that upper computer control system is correct according to the verification number of turns setting electric energy meter error check system of tested electric energy meter;
(5) electric energy meter error check system normally runs, and verifies tested electric energy meter error.
By such scheme, described step (5) specifically comprises:
I) directly obtained the pulse information of tested electric energy meter by pulse capture module, obtain the energy value of tested electric energy meter;
Ii) by electric current, the magnitude of voltage of each sampled point of AD sampling module real-time sampling, and each electric current, magnitude of voltage are sent into first processor;
Iii) by first processor, the electric current of each sampled point, magnitude of voltage are multiplied, obtain the power of sampled point and send into dual port RAM;
Iv) read the data stored in dual port RAM by the second processor, carry out the calculating of electric energy and the output of verification pulse, and by the real-time display vector figure of display terminal module, the fundamental measurement value of current/voltage power, original waveform, alarming value.
The beneficial effects of the utility model are:
1, with Traditional Method obtain compared with power by the root-mean-square value of the voltage in the sampling period, current value, adopt the process of first processor real-time sampling, precision is higher; By inner two CSTR co-ordination, to calculate electric energy voltage signal and current signal adopts in real time, in real time calculate, compare in real time, and the data of Real-time Collection are stored, conveniently provides guidance to follow-up maintenance, also theoretical foundation is provided to chasing of electric energy simultaneously;
2, because mains frequency has undulatory property, the outer down trigger pulse collection module of 6.4K adopts PHASE-LOCKED LOOP PLL TECHNIQUE to compare traditional timing sampling, and it adopts precision higher, can effectively prevent from fluctuating the error produced because of mains frequency;
3, an electric energy meter error check system can manipulate 8 gate energy meters simultaneously, and error checking work efficiency is significantly improved;
4, the precision of electric energy meter error check system is up to 0.05 grade, can meet the gate energy meter error checking demand of 0.2 grade;
5, the original waveform of electric energy meter to be checked can be recorded, by the vector plot that the display terminal module of electric energy meter error check system shows, staff can be facilitated to determine connection box of electric energy meter whether mistake, the function of have mistake proofing wiring, reporting to the police to abnormal conditions, has the advantages that work efficiency is high, utilization of area rate is high.
Accompanying drawing explanation
Fig. 1 is the system architecture diagram of the utility model electric energy meter error check system.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
As shown in Figure 1, electric energy meter error check system described in the utility model, system mainly comprises relay switch boards, AD sampling module, the outer down trigger pulse collection module of 6.4K, pulse capture module, dual processors module, dual port RAM and display terminal module, wherein, dual processors module comprises first processor DSPA and the second processor DSPB, plurality of voltages current signal cut-in relay switch boards, relay switch boards is connected with the input end of AD sampling module, the output terminal of AD sampling module is connected with first processor DSPA by data bus, the outer down trigger pulse collection module of 6.4K, pulse capture module all accesses first processor, first processor DSPA is connected with the second processor DSPB through dual port RAM by data bus simultaneously, second processor DSPB and display terminal model calling, second processor DSPB is also provided with switch boards control signal port simultaneously, verification pulse output end mouth, communication interface, switch boards control signal port is connected with relay switch boards, communication interface is used for the second processor DSPB and upper computer control system to communicate to connect, relay switch boards is for ensureing that electric energy meter error check system carries out error checking for 8 pieces of gate energy meters simultaneously, the outer down trigger pulse collection module of 6.4K is used for ensureing that AD sampling module has fixing sampling number within each sampling period by design phase-locked loop circuit.
The outer look-at-me of 6.4K realizes precisely sampling, and strict control AD acquisition module one-period gathers 128 sampled points.
First processor DSPA passes through AD acquisition module by the real-time electric power signal of collection stored in dual port RAM, second processor DSPB carries out the calculating of electric energy and the output of verification pulse by the value reading dual port RAM, and in the required content shown of the upper display of display terminal module (touching liquid-crystal display screen), the switching of DSPB pilot relay switch boards simultaneously completes the collection to different electric energy meter.
The method of calibration of the utility model electric energy meter error check system, comprises the steps:
(1) the pulse capture model calling of electric energy meter error check system is by the pulse output interface of school electric energy meter;
The communication interface (485 order wire) of (2) second processor DSPB connects upper computer control system;
(3) current input terminal that three-phase voltage line parallel connects the voltage input end of tested electric energy meter and electric energy meter error check system, three-phase electricity streamline is connected in series tested electric energy meter and electric energy meter error check system;
(4) the verification number of turns that upper computer control system is correct according to the verification number of turns setting electric energy meter error check system of tested electric energy meter;
(5) electric energy meter error check system normally runs, and verifies tested electric energy meter error, specifically comprises:
I) directly obtained the pulse information of tested electric energy meter by pulse capture module, obtain the energy value of tested electric energy meter;
Ii) by electric current, the magnitude of voltage of each sampled point of AD sampling module real-time sampling, and each electric current, magnitude of voltage are sent into first processor;
Iii) by first processor DSPA, the electric current of each sampled point, magnitude of voltage are multiplied, obtain the power of sampled point and send into dual port RAM;
Iv) read the data stored in dual port RAM by the second processor DSPB, carry out the calculating of electric energy and the output of verification pulse, and by the real-time display vector figure of display terminal module, the fundamental measurement value of current/voltage power, original waveform, alarming value.
Above-described embodiment is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And these belong to spirit institute's apparent change of extending out of the present utility model or change and are still among protection domain of the present utility model.
Claims (1)
1. an electric energy meter error check system, it is characterized in that, comprise: relay switch boards, AD sampling module, the outer down trigger pulse collection module of 6.4K, pulse capture module, dual processors module, dual port RAM and display terminal module, wherein, dual processors module comprises first processor and the second processor, plurality of voltages current signal cut-in relay switch boards, relay switch boards is connected with the input end of AD sampling module, the output terminal of AD sampling module is connected with first processor by data bus, the outer down trigger pulse collection module of 6.4K, pulse capture module all accesses first processor, first processor is connected with the second processor through dual port RAM by data bus simultaneously, second processor and display terminal model calling, second processor is also provided with switch boards control signal port simultaneously, verification pulse output end mouth, communication interface, switch boards control signal port is connected with relay switch boards, communication interface is used for the second processor and upper computer control system to communicate to connect, relay switch boards is for ensureing that electric energy meter error check system carries out error checking for 8 pieces of gate energy meters simultaneously, the outer down trigger pulse collection module of 6.4K is used for ensureing that AD sampling module has fixing sampling number within each sampling period by design phase-locked loop circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521001582.1U CN205157765U (en) | 2015-12-04 | 2015-12-04 | Electric energy meter error calibration system |
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| CN201521001582.1U CN205157765U (en) | 2015-12-04 | 2015-12-04 | Electric energy meter error calibration system |
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| CN205157765U true CN205157765U (en) | 2016-04-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319529A (en) * | 2015-12-04 | 2016-02-10 | 国网电力科学研究院武汉南瑞有限责任公司 | System and method for calibrating errors of watt-hour meters |
| CN112305491A (en) * | 2020-10-30 | 2021-02-02 | 海南电网有限责任公司 | Multi-loop switching method |
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2015
- 2015-12-04 CN CN201521001582.1U patent/CN205157765U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319529A (en) * | 2015-12-04 | 2016-02-10 | 国网电力科学研究院武汉南瑞有限责任公司 | System and method for calibrating errors of watt-hour meters |
| CN105319529B (en) * | 2015-12-04 | 2018-06-12 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of electric energy meter error check system and method for calibration |
| CN112305491A (en) * | 2020-10-30 | 2021-02-02 | 海南电网有限责任公司 | Multi-loop switching method |
| CN112305491B (en) * | 2020-10-30 | 2023-12-29 | 海南电网有限责任公司 | Multi-loop switching method |
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