CN106443567A - Real-load test system for electric energy meters - Google Patents
Real-load test system for electric energy meters Download PDFInfo
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- CN106443567A CN106443567A CN201611094396.6A CN201611094396A CN106443567A CN 106443567 A CN106443567 A CN 106443567A CN 201611094396 A CN201611094396 A CN 201611094396A CN 106443567 A CN106443567 A CN 106443567A
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to a real-load test system for electric energy meters. The system comprises an upper computer in two-way communication with a central control panel, the central control panel is in two-way communication with a single-phase error test device and a three-phase error test device respectively, the single-phase error test device is used for error testing of single-phase tested electric energy meters, and the three-phase error test device is used for error testing of three-phase tested three-phase error test device. The central control panel supplies power to the single-phase error test device and the three-phase error test device. The real-load test system has advantages that an on-site power consumption simulated real load is adopted for testing metering errors of the electric energy meters under actual power consumption conditions; actual load curves in operation of the electric energy meters can be outputted to assist in proper and accurate knowing and mastering of operation metering conditions of the electric energy meters; under real load conditions, power line carrier communication capability of the tested electric energy meters is tested through an external carrier record controller, so that true reflection of user site environments can be realized.
Description
Technical field
The present invention relates to power test technical field, the actual loading test system of especially a kind of electric energy meter.
Background technology
At present, intelligent electric energy meter has obtained increasingly being widely applied, and electric energy meter produces as a kind of metering of degree of precision
Product, the Stability and veracity of its metering is the importance of user's concern.Before electric energy meter dispatches from the factory, ammeter manufacturer needs
Electric energy meter is measured and the calibrating of performance qualification, be judged the no requirement meeting user of electric energy meter, its measuring accuracy and property
Whether energy quality is qualified, if possess the condition dispatched from the factory.
Before electric energy meter formally comes into operation, to approve through the inspection of electric-power metering department, need also exist for detecting it
Measuring accuracy the accordance of authentication function.It is contemplated that production cost and inspection cost, current production firm and kilowatt meter
Assay device used by amount office is all using fictitious load, the measuring accuracy of electric energy meter to be examined and determine, and installs inside check-out console
The voltage x current source of constant output, when to electric energy meter calibration, exports constant current/voltage source to sampling circuit, by electric energy
The conversion of table Internal Gauge unit draws the variable flowing through ammeter, is then compared with the variable of the standard scale within stage body
Relatively, obtain the error amount of accredited electric energy meter, whether contrast meets deviation requirement, thus judging whether electric energy meter is qualified.This
Method only theoretically judges to the precision of electric energy meter, and added electric current is preferable clean electric current, is not real work
In load current.Operating characteristic under fictitious load might not with real load under work completely the same, error in dipping meeting
Also can there is certain deviation, safer method is electric energy meter to be sampled examining and determine under real load.
Content of the invention
It is an object of the invention to provide one kind is in the case of the analog subscriber actual electricity consumption in scene, using really bearing
Carry, the sample circuit function of measuring of electric energy meter is detected, judge the reality of the whether normal electric energy meter of electric energy meter function of measuring
Load testing system.
For achieving the above object, present invention employs technical scheme below：A kind of actual loading test system of electric energy meter, bag
Include host computer, host computer and center panel both-way communication, described center panel respectively with for single-phase tested electric energy meter
Carry out the single-phase error test device of error testing, being used for the three-phase error testing that the tested electric energy meter to three-phase carries out error testing
Device both-way communication, described center panel is powered to single-phase error test device and three-phase error testing device respectively.
Described center panel adopts main control chip, and described main control chip is STC89C516 main control chip.
Described single-phase error test device includes program control single-phase power source, a RLC load box, the first high-power pressure regulation
Source, the first standard electric energy meter, the first Error Calculator and multiple first error display, the first communication of described center panel
Port is connected with the Communication Control end in program control single-phase power source, and described program control single-phase power source is divided by the first high-power pressure regulation source
Continuous running voltage, described center panel and a RLC is not provided to bear for single-phase tested electric energy meter, the first standard electric energy meter
Carry case both-way communication, a described RLC load box output real current signal is respectively to the first standard electric energy meter and single-phase tested
Electric energy meter, the signal output part of the first standard electric energy meter and single-phase tested electric energy meter input phase all with the first Error Calculator
Even, the outfan of the first Error Calculator is connected with the input of the first error display.
Described three-phase error testing device includes program control three phase power source, the 2nd RLC load box, second largest power regulation
Source, threephase potential transformer PT, threephase current transformer CT, supervisory instrument, three-phase on-site calibrator, the second Error Calculator and
Multiple second error displays, the second PORT COM of described center panel and the Communication Control port of program control three phase power source
It is connected, described program control three phase power source passes through second largest power regulation source provides the continuous electricity that works for the tested electric energy meter of three-phase
Pressure, described center panel and the 2nd RLC load box both-way communication, described 2nd RLC load box output real current signal divides
Not to threephase current transformer CT and the tested electric energy meter of three-phase, the signal output part of described threephase current transformer CT respectively with prison
Current input terminal depending on instrument, three-phase on-site calibrator is connected；The outfan in described second largest power regulation source and three-phase voltage
The input of transformer PT is connected, the signal output part of threephase potential transformer PT respectively with supervisory instrument, three-phase field-checking
The voltage input end of instrument is connected, described three-phase on-site calibrator, the tested electric energy meter of three-phase signal output part all with the second error
The input of computer is connected, and the outfan of the second Error Calculator is connected with the input of the second error display.
Described first Error Calculator and center panel both-way communication.
Described second Error Calculator and center panel both-way communication, setting second mark in described three-phase on-site calibrator
Quasi- electric energy meter.
As shown from the above technical solution, it is an advantage of the current invention that：First, the present invention can adopt simulated field electricity consumption
Real load, tests the error in dipping of ammeter in the case of actual electricity consumption；Second, the present invention can export the reality of ammeter operation
Load curve, helps properer operation metering situation more accurately understanding and grasping electric energy meter；3rd, the present invention is truly bearing
In the case of load, by external subcarrier copy controller, the power carrier communication ability of detected electric energy meter is tested, more can be true
Reaction user scene environment.
Brief description
Fig. 1 is the system construction drawing of the present invention；
Fig. 2 is the overall operation flow chart of the present invention.
Specific embodiment
As shown in figure 1, a kind of actual loading test system of electric energy meter, including host computer, host computer is double with center panel
To communication, described center panel respectively with the single-phase error test device for single-phase tested electric energy meter carried out with error testing
1st, it is used for three-phase error testing device 2 both-way communication that the tested electric energy meter to three-phase carries out error testing, described center panel
Power to single-phase error test device 1 and three-phase error testing device 2 respectively.Described center panel adopts main control chip, institute
Stating main control chip is STC89C516 main control chip.
As shown in figure 1, described single-phase error test device 1 include program control single-phase power source, a RLC load box, first
High-power pressure regulation source, the first standard electric energy meter, the first Error Calculator and multiple first error display, described center panel
The first PORT COM be connected with the Communication Control end in program control single-phase power source, described program control single-phase power source pass through the first big work(
Rate pressure regulation source is respectively single-phase tested electric energy meter, the first standard electric energy meter provides continuous running voltage, described center panel
With a RLC load box both-way communication, a described RLC load box output real current signal is respectively to the first standard electric energy meter
With single-phase tested electric energy meter, the signal output part of the first standard electric energy meter and single-phase tested electric energy meter all with the first Error Calculator
Input be connected, the outfan of the first Error Calculator is connected with the input of the first error display.Described first error
Computer and center panel both-way communication.
As shown in figure 1, described three-phase error testing device 2 include program control three phase power source, the 2nd RLC load box, second
High-power pressure regulation source, threephase potential transformer PT, threephase current transformer CT, supervisory instrument, three-phase on-site calibrator, the second mistake
Difference computer and multiple second error display, the second PORT COM of described center panel is logical with program control three phase power source
News control port is connected, and described program control three phase power source passes through second largest power regulation source to be provided continuously for the tested electric energy meter of three-phase
Running voltage, described center panel and the 2nd RLC load box both-way communication, described 2nd RLC load box output truly electricity
Stream signal is respectively to threephase current transformer CT and the tested electric energy meter of three-phase, the signal output part of described threephase current transformer CT
It is connected with the current input terminal of supervisory instrument, three-phase on-site calibrator respectively；The outfan in described second largest power regulation source with
The input of threephase potential transformer PT is connected, the signal output part of threephase potential transformer PT respectively with supervisory instrument, three-phase
The voltage input end of on-site calibrator is connected, described three-phase on-site calibrator, the tested electric energy meter of three-phase signal output part all with
The input of the second Error Calculator is connected, the input phase of the outfan of the second Error Calculator and the second error display
Even.Described second Error Calculator and center panel both-way communication, setting the second standard electric in described three-phase on-site calibrator
Can table.
As shown in Fig. 2 Section 3 selects to refer to select single-phase or three-phase, Basic function testing and multifunctional testing concrete
As follows：
Direct current stress_responsive genes refer to that direct current even-order harmonic is tested：Rated frequency is the harmonic wave of fundamental frequency even-multiple, is referred to as " even
Subharmonic ", such as 2,4,6,8 subharmonic, using the alternating current series diode to access electric energy meter, the electric energy of test in stage body
The necessary mounted in pairs of table, during test, reference current chooses 14.1A, and power factor is 1.
Voltage Drop test refers in normal voltage test process, by operating high-power pressure regulation source fast lifting, real
The existing quick fall-down test of voltage.
Power consumption test refers to, by internal power consumption test module, test voltage loop and current loop power consumption, carrying respectively
Ripple reads the power data of standard scale in the case of communicating and not communicating, obtain the power consumption of electric energy meter.
Carrier test refers to, in stage body energising test process, by external power carrier copy controller, electric energy meter be carried
Ripple copy reading, the accurate success rate of copy reading information under different voltages and load for the test.
Mains isolation test refers to be equipped with high-power insulating power supply inside test device, and test process is to guarantee test peace
Entirely, start insulating power supply, realize mains isolation.
Actual loading test refers to that start RLC load box carries out power band load to electric energy meter, and test is tested to as actual loading.
Below in conjunction with Fig. 1,2 the present invention is further illustrated.
Tested electric energy meter is fixed on the patch bay of inspection table platform, starts stage body, on tested electric energy meter, electricity runs, and opens
Dynamic RLC load box, the metering of tested electric energy meter is run and is driven by the actual loading power consumption of rear end.Host computer is through serial ports
Server expands the load characteristic that the serial ports multichannel arranges RLC load box by RS485 or RS232 communication mode, thus adjusting
The size of current of section load and phase angle characteristics.By adjusting the voltage of power supply, can be with simulated implementation electric energy meter in actual fortune
Voltage occurs during row quickly fall and the metering situation under voltage quickly rising situation, judge whether electric quantity metering not
Accurately.
Host computer detects the variable of electric energy meter by serial communication, measures with standard electric energy meter through tested electric energy meter
Energy value compare and obtain the relative error of tested ammeter, compare, with the error upper limit of user setup, the error to judge electric energy meter
Whether qualified.When inspection table parameter（Such as current specification, capacitance-resistance characteristic, perception etc.）After determination, host computer is according to the calibration setting
Parameter is sequentially adjusted in the electric current loading, and carries out error testing, verification result is stored in data base.By to load and power on/off
Operation, host computer also have test electric energy meter load curve function.
Program control single-phase power source provides continuous running voltage through the first high-power pressure regulation source for single-phase tested electric energy meter,
First RLC load box is single-phase tested electric energy meter and the first standard electric energy meter provides real electric current output, and each is single-phase tested
Electric energy meter through first Error Calculator calculate again by with the first standard electric energy meter comparison data, finally by first error show
Show that device shows.
Program control three phase power source provides three-phase continuously to work electricity through second largest power regulation source for the tested electric energy meter of three-phase
Source, calculates simultaneously and shows by supervisory instrument real-time display actual voltage value through voltage transformer pt.Host computer control
Making the 2nd RLC load box provides actual loading electric current for the tested electric energy meter of three-phase, and through Current Transmit conversion, through three-phase
After on-site calibrator verification, then reality is finally shown on the second error display by the second Error Calculator calculating comparison
Error amount.
A RLC load box that this device adopts and the 2nd RLC load box are collect resistive, perceptual, capacitive and one negative
Carry case, the use electric consumption at user scene for the true simulation electric energy meter, electric energy metrical is truly counted according to live actual kwh loss
Amount, supply voltage passes through high-power voltage source, the unexpected incidents of electricity in the quick power down of true simulated field, and detection electricity is existing
Electric energy metrical situation under the accident of field.Voltage transformer pt summation current transformer CT is as the adnexa of program control three phase power source
It is fixed together with program control three phase power source；Error Calculator is an integrated component of error display, is arranged on error and shows
Show inside device, tested electric energy meter is outside measurand, on the correspondence position being only fixed on device in test；
In test, its step is as follows：
First, select start button, run to electricity on stage body, according to product type to be tested, tested electric energy meter is arranged on platform
On body, single-phase patch bay or three-phase patch bay correspond to epi-position, operation crimping handle, tested electric energy meter is fixed, adjusts photoelectricity and adopt
Storage position is so as to be directed at product pulse output indicator to be measured；The optical telecommunications of the effect acquisition pulse output of photoelectric gathering apparatus
Number, then be transferred to error counter and carry out Error Calculation；
2nd, the power control switch of RLC load box, opening operation display screen, configuration parameter are operated；Open host computer, according to quilt
Inspection electric energy meter place station and test event, setup parameter configures；
3rd, automatically according to set content, voluntarily the tested electric energy meter on calibrating rack carries out trueness error measurement to system and direct current is even
Subharmonic is tested；
4th, pass through to control the output of stage body power supply, complete stage body performance test communication test；
5th, after test terminates, press test conclusion button, power cutoff switchs.
The present invention can adopt the real load of simulated field electricity consumption, tests the metering of ammeter by mistake in the case of actual electricity consumption
Difference；The present invention can export the realized load curve of ammeter operation, and help is properer more accurately to understand and grasp electric energy meter
Run metering situation；The present invention, in the case of real load, is carried to the electric power of detected electric energy meter by external subcarrier copy controller
Ripple ability to communicate is tested, and more can really react the environment at user scene.
Claims (6)
1. a kind of electric energy meter actual loading test system it is characterised in that：Including host computer, host computer is two-way with center panel
Communication, described center panel respectively with the single-phase error test device for single-phase tested electric energy meter carried out with error testing
（1）, carry out the three-phase error testing device of error testing for the tested electric energy meter to three-phase（2）Both-way communication, the control of described center
Making sheet is respectively to single-phase error test device（1）With three-phase error testing device（2）Power supply.
2. electric energy meter according to claim 1 actual loading test system it is characterised in that：Described center panel adopts
Main control chip, described main control chip is STC89C516 main control chip.
3. electric energy meter according to claim 1 actual loading test system it is characterised in that：Described single-phase error test dress
Put（1）Including program control single-phase power source, a RLC load box, the first high-power pressure regulation source, the first standard electric energy meter, the first mistake
Difference computer and multiple first error display, the first PORT COM of described center panel is logical with program control single-phase power source
News control end connect, described program control single-phase power source by the first high-power pressure regulation source be respectively single-phase tested electric energy meter, first
The standard electric energy meter continuous running voltage of offer, described center panel and a RLC load box both-way communication, described first
RLC load box output real current signal is respectively to the first standard electric energy meter and single-phase tested electric energy meter, the first standard electric energy meter
All be connected with the input of the first Error Calculator with the signal output part of single-phase tested electric energy meter, the first Error Calculator defeated
Go out end to be connected with the input of the first error display.
4. electric energy meter according to claim 1 actual loading test system it is characterised in that：Described three-phase error testing dress
Put（2）Including program control three phase power source, the 2nd RLC load box, second largest power regulation source, threephase potential transformer PT, three-phase
Current Transmit, supervisory instrument, three-phase on-site calibrator, the second Error Calculator and multiple second error display, described
Second PORT COM of center panel is connected with the Communication Control port of program control three phase power source, described program control three phase power source
There is provided continuous running voltage, described center panel and second by second largest power regulation source for the tested electric energy meter of three-phase
RLC load box both-way communication, described 2nd RLC load box output real current signal is respectively to threephase current transformer CT and three
Mutually tested electric energy meter, the signal output part of described threephase current transformer CT respectively with supervisory instrument, three-phase on-site calibrator
Current input terminal is connected；The outfan in described second largest power regulation source is connected with the input of threephase potential transformer PT, and three
The signal output part of phase voltage transformer PT is connected with the voltage input end of supervisory instrument, three-phase on-site calibrator respectively, described
The signal output part of the tested electric energy meter of three-phase on-site calibrator, three-phase is all connected with the input of the second Error Calculator, and second
The outfan of Error Calculator is connected with the input of the second error display.
5. electric energy meter according to claim 3 actual loading test system it is characterised in that：Described first Error Calculator
With center panel both-way communication.
6. electric energy meter according to claim 4 actual loading test system it is characterised in that：Described second Error Calculator
With setting the second standard electric energy meter in center panel both-way communication, described three-phase on-site calibrator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611094396.6A CN106443567B (en) | 2016-12-02 | 2016-12-02 | Real load test system of electric energy meter |
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| CN201611094396.6A CN106443567B (en) | 2016-12-02 | 2016-12-02 | Real load test system of electric energy meter |
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| CN106443567B CN106443567B (en) | 2023-06-16 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108919171A (en) * | 2018-06-29 | 2018-11-30 | 国网宁夏电力有限公司固原供电公司 | Ammeter internal fault tester |
| CN110888100A (en) * | 2019-11-29 | 2020-03-17 | 国网重庆市电力公司电力科学研究院 | Single-phase intelligent electric energy meter online on-load detection system and method |
| CN112731262A (en) * | 2020-12-11 | 2021-04-30 | 国网上海市电力公司 | Verification equipment for electric energy meter |
| CN113281696A (en) * | 2021-04-29 | 2021-08-20 | 煜邦电力智能装备(嘉兴)有限公司 | Carrier interface state detection device and method for three-phase electric energy meter and concentrator |
| CN114114130A (en) * | 2021-09-18 | 2022-03-01 | 宁夏隆基宁光仪表股份有限公司 | Electric energy meter testing method, system and device based on actual load on simulation site |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112731262A (en) * | 2020-12-11 | 2021-04-30 | 国网上海市电力公司 | Verification equipment for electric energy meter |
| CN113281696A (en) * | 2021-04-29 | 2021-08-20 | 煜邦电力智能装备(嘉兴)有限公司 | Carrier interface state detection device and method for three-phase electric energy meter and concentrator |
| CN114114130A (en) * | 2021-09-18 | 2022-03-01 | 宁夏隆基宁光仪表股份有限公司 | Electric energy meter testing method, system and device based on actual load on simulation site |
| CN114114130B (en) * | 2021-09-18 | 2024-05-14 | 宁夏隆基宁光仪表股份有限公司 | Electric energy meter testing method, system and device based on simulation site actual load |
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|---|---|
| CN106443567B (en) | 2023-06-16 |
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