CN108562864A - The method that single-point power method calibrates electric energy meter error - Google Patents
The method that single-point power method calibrates electric energy meter error Download PDFInfo
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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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- 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
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
- G01R35/007—Standards or reference devices, e.g. voltage or resistance standards, "golden references"
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Abstract
The present invention relates to a kind of methods that single-point power method calibrates electric energy meter error, are mainly used in intelligent electric meter industry.The purpose of the present invention is come what is completed, the method that single-point power method calibrates electric energy meter error includes the following steps by following technical solution：A, apply voltage, the electric current that power factor is 0.5L to by school electric energy meter；B, initialization is by school electric energy meter；C, voltage, electric current, split-phase active power and the split-phase reactive power of standard scale are obtained；D, voltage error is calculated according to formula Uer=Umsr/Uexp 1, according to 1 calculating current errors of formula Ier=Imsr/Iexp, power error is calculated according to formula Per=Smsr/Sexp 1, phase error is calculated according to formula Pher=Pmsr/Pexp 1, and error correction is completed according to errors value is calculated；The present invention improves the production efficiency of electric energy meter, realizes the disposable reading and analysis of whole parameters.
Description
Technical field
The present invention relates to a kind of methods that single-point power method calibrates electric energy meter error, are mainly used in intelligent electric meter industry.
Background technology
Complicated calibration flow can be required for by the electric energy meter of software calibration at present, is to apply volume to calibrated meter first
Fixed voltage, electric current, power factor are 1.0L, calibrate the voltage of electric energy meter, electric current, power error with this condition；Electricity is given again
Energy top application making alive, electric current, power factor is 0.5L, calibrates the phase error of electric energy meter with this condition.That is, calibrating in two steps
The error of electric energy meter, first step calibration voltage, electric current, power error, the second step calibration phase.
The problems of above-mentioned prior art：The method of calibration error is complicated, and time-consuming too long, production efficiency is not high；It is whole
A calibration process is all completed by host computer substantially, and the electric energy meter of different metered schemes needs to customize different upper computer softwares.
Invention content
It is above-mentioned it is an object of the invention to overcome the problems, such as, a kind of single-point power method calibration electric energy meter error is provided
Method solves the problems, such as that electric energy meter calibration efficiency is low.
The purpose of the present invention is by following technical solution to complete,
The method that single-point power method calibrates electric energy meter error, includes the following steps：
A, apply voltage, the electric current that power factor is 0.5L to by school electric energy meter；
B, initialization is by school electric energy meter；
C, voltage, electric current, split-phase active power and the split-phase reactive power of standard scale are obtained；
D, voltage error is calculated according to formula Uer=Umsr/Uexp-1, electricity is calculated according to formula Ier=Imsr/Iexp-1
Stream error, power error is calculated according to formula Per=Smsr/Sexp-1, and phase is calculated according to formula Pher=Pmsr/Pexp-1
Error, and complete error correction according to errors value is calculated；
In formula, Uer is by school electric energy meter voltage error, and Umsr, Uexp are respectively to measure voltage and standard by school electric energy meter
Table voltage；Ier is by school electrical energy meter electricity stream error, and Imsr, Iexp are respectively to measure electric current and standard scale electric current by school electric energy meter；
Per is by school electric energy meter power error, and Smsr, Sexp are respectively by school electric energy meter apparent energy and standard scale apparent energy；
Pher is by school phase error of energy meter, and Pmsr, Pexp are respectively to measure active power and standard scale wattful power by school electric energy meter
Rate.
Preferably, the host computer being connected respectively with standard scale and by school electric energy meter obtains the voltage of standard scale, electric current, divides
Phase active power and split-phase reactive power, and send it to by school electric energy meter, each mistake is calculated according to step D by school electric energy meter
Difference, and it is automatically performed error correction according to errors value is calculated.
Preferably, the method further includes：
Host computer reads voltage error, current error and the power error after being calibrated by school electric energy meter, analyses whether to calibrate
Qualification terminates this calibration if qualified；Otherwise return to step A.
Preferably, described by school electric energy meter apparent energyWherein Pmsr is by school electricity
Energy table measures active power, and Qmsr is to measure reactive power by school electric energy meter.
Preferably, described initialize by school electric energy meter, specially：
The host computer being connected respectively with standard scale and by school electric energy meter sends initialization command, initially to by school electric energy meter
Change by school electric energy meter, it is made to use acquiescence calibration parameter.
The method that single-point power method calibrates electric energy meter error, includes the following steps：
A, apply voltage, the electric current that power factor is 0.5L to by school electric energy meter；
B, initialization is by school electric energy meter；
C, voltage, electric current, split-phase active power and the split-phase reactive power of standard scale are obtained；
D, voltage error is calculated according to formula Uer=Umsr/Uexp-1, electricity is calculated according to formula Ier=Imsr/Iexp-1
Stream error calculates power error, according to formula Pher=1/ (1+Per) × Pmsr/ according to formula Per=Smsr/Sexp-1
Pexp-1 calculates phase error, and completes error correction according to errors value is calculated；
In formula, Uer is by school electric energy meter voltage error, and Umsr, Uexp are respectively to measure voltage and standard by school electric energy meter
Table voltage；Ier is by school electrical energy meter electricity stream error, and Imsr, Iexp are respectively to measure electric current and standard scale electric current by school electric energy meter；
Per is by school electric energy meter power error, and Smsr, Sexp are respectively by school electric energy meter apparent energy and standard scale apparent energy；
Pher is by school phase error of energy meter, and Pmsr, Pexp are respectively to measure active power and standard scale wattful power by school electric energy meter
Rate.
Preferably, the host computer being connected respectively with standard scale and by school electric energy meter obtains the voltage of standard scale, electric current, divides
Phase active power and split-phase reactive power, and send it to by school electric energy meter, each mistake is calculated according to step D by school electric energy meter
Difference, and it is automatically performed error correction according to errors value is calculated.
Preferably, the method further includes：
Host computer reads voltage error, current error and the power error after being calibrated by school electric energy meter, analyses whether to calibrate
Qualification terminates this calibration if qualified；Otherwise return to step A.
Preferably, described by school electric energy meter apparent energyWherein Pmsr is by school electricity
Energy table measures active power, and Qmsr is to measure reactive power by school electric energy meter.
Preferably, described initialize by school electric energy meter, specially：
The host computer being connected respectively with standard scale and by school electric energy meter sends initialization command, initially to by school electric energy meter
Change by school electric energy meter, it is made to use acquiescence calibration parameter.
The present invention has the following advantages compared with prior art and effect：1, the present invention compared with the prior art, eliminates 1.0L
Under voltage, electric current and power calibration, only under conditions of 0.5L can calibration voltage, electric current, power and phase error, it is real
Show the error for calibrating electric energy meter in a power points, substantially increases the production efficiency of electric energy meter.2, real inside electric energy meter
Existing calibration, need not customize dedicated host computer, and the electric energy meter for solving different metered schemes in the prior art needs to customize not
With upper computer software the problem of, have important meaning to the mass production of electric energy meter.3, host computer is read by school electric energy meter
Voltage error, current error after calibration and power error analyse whether that calibration is qualified, realize the disposable reading of whole parameters
It takes and analyzes.
Description of the drawings
Fig. 1 is the flow chart of the method for the present invention.
Specific implementation mode
Detailed introduction is done to the present invention below in conjunction with attached drawing.
As shown in Figure 1, the present invention improves on the basis of existing electric energy meter is calibrated, eliminate voltage under 1.0L,
The calibration of electric current and power, only under conditions of 0.5L can calibration voltage, electric current, power and phase error, realize one
The error of a power points calibration electric energy meter, substantially increases the production efficiency of electric energy meter.The premise that the present invention realizes is calibration electricity
The equipment of energy table can export accurate voltage, electric current, active power, reactive power, power factor 0.5L.
Embodiment 1
The amendment of power error can influence phase error in actual metered, but since each chip producer calibration algorithm is each
It is different, cause the amendment of power error not necessarily to influence phase error, therefore, needs are according to by school when carrying out phase error computation
The difference of electric energy meter chip takes different schemes.Electric energy meter of the present embodiment based on U.S. letter SOC schemes, power error and phase
It is independent between error, it is independent of each other；The method that the present embodiment single-point power method calibrates electric energy meter error, includes the following steps：
A, apply voltage, the electric current that power factor is 0.5L to by school electric energy meter；
B, initialization is by school electric energy meter；
C, voltage, electric current, split-phase active power and the split-phase reactive power of standard scale are obtained；
D, voltage error is calculated according to formula Uer=Umsr/Uexp-1, electricity is calculated according to formula Ier=Imsr/Iexp-1
Stream error, power error is calculated according to formula Per=Smsr/Sexp-1, and phase is calculated according to formula Pher=Pmsr/Pexp-1
Error, and complete error correction according to errors value is calculated；Obtained voltage error, current error, power error and phase
Error writes correction value to corresponding register according to the requirement of different chips, and backs up correction value to nonvolatile memory；
In formula, Uer is by school electric energy meter voltage error, and Umsr, Uexp are respectively to measure voltage and standard by school electric energy meter
Table voltage；Ier is by school electrical energy meter electricity stream error, and Imsr, Iexp are respectively to measure electric current and standard scale electric current by school electric energy meter；
Per is by school electric energy meter power error, and Smsr, Sexp are respectively by school electric energy meter apparent energy and standard scale apparent energy；
Pher is by school phase error of energy meter, and Pmsr, Pexp are respectively to measure active power and standard scale wattful power by school electric energy meter
Rate.
Preferably, the host computer being connected respectively with standard scale and by school electric energy meter obtains the voltage of standard scale, electric current, divides
Phase active power and split-phase reactive power, and it is sent to according to the communications protocol that electric energy meter is supported by school electric energy meter, by school
Electric energy meter calculates each error amount according to step D, and is automatically performed error correction according to errors value is calculated.It realizes autonomous
Calibration does not need upper computer software and calculates and be written correction value, need not customize dedicated host computer, solve in the prior art
The electric energy meter of different metered schemes needs the problem of customizing different upper computer softwares.
In practical application, can also directly it carried out data transmission between school electric energy meter and standard scale.
Preferably, the method for the single-point power method calibration electric energy meter error further includes：
Host computer reads voltage error, current error and the power error after being calibrated by school electric energy meter, analyses whether to calibrate
Qualification terminates this calibration if qualified；Otherwise return to step A realizes the disposable reading and analysis of whole parameters.
Preferably, described by school electric energy meter apparent energyWherein Pmsr is by school electricity
Energy table measures active power, and Qmsr is to measure reactive power by school electric energy meter.
Preferably, described initialize by school electric energy meter, specially：
The host computer being connected respectively with standard scale and by school electric energy meter sends initialization command, initially to by school electric energy meter
Change by school electric energy meter, it is made to use acquiescence calibration parameter.
Embodiment 2
The amendment of power error can influence phase error in actual metered, but since each chip producer calibration algorithm is each
It is different, cause the amendment of power error not necessarily to influence phase error, therefore, needs are according to by school when carrying out phase error computation
The difference of electric energy meter chip takes different schemes.Electric energy meter of the present embodiment based on MSP430 schemes, the amendment of power error
It can influence phase error；The method that the present embodiment single-point power method calibrates electric energy meter error, includes the following steps：
A, apply voltage, the electric current that power factor is 0.5L to by school electric energy meter；
B, initialization is by school electric energy meter；
C, voltage, electric current, split-phase active power and the split-phase reactive power of standard scale are obtained；
D, voltage error is calculated according to formula Uer=Umsr/Uexp-1, electricity is calculated according to formula Ier=Imsr/Iexp-1
Stream error calculates power error, according to formula Pher=1/ (1+Per) × Pmsr/ according to formula Per=Smsr/Sexp-1
Pexp-1 calculates phase error, and completes error correction according to errors value is calculated；Obtained voltage error, current error,
Power error and phase error write correction value to corresponding register according to the requirement of different chips, and back up correction value to non-
Volatile memory；
In formula, Uer is by school electric energy meter voltage error, and Umsr, Uexp are respectively to measure voltage and standard by school electric energy meter
Table voltage；Ier is by school electrical energy meter electricity stream error, and Imsr, Iexp are respectively to measure electric current and standard scale electric current by school electric energy meter；
Per is by school electric energy meter power error, and Smsr, Sexp are respectively by school electric energy meter apparent energy and standard scale apparent energy；
Pher is by school phase error of energy meter, and Pmsr, Pexp are respectively to measure active power and standard scale wattful power by school electric energy meter
Rate.
Preferably, the host computer being connected respectively with standard scale and by school electric energy meter obtains the voltage of standard scale, electric current, divides
Phase active power and split-phase reactive power, and it is sent to according to the communications protocol that electric energy meter is supported by school electric energy meter, by school
Electric energy meter calculates each error amount according to step D, and is automatically performed error correction according to errors value is calculated.It realizes autonomous
Calibration does not need upper computer software and calculates and be written correction value, need not customize dedicated host computer, solve in the prior art
The electric energy meter of different metered schemes needs the problem of customizing different upper computer softwares.
In practical application, can also directly it carried out data transmission between school electric energy meter and standard scale.
Preferably, the method for the single-point power method calibration electric energy meter error further includes：
Host computer reads voltage error, current error and the power error after being calibrated by school electric energy meter, analyses whether to calibrate
Qualification terminates this calibration if qualified；Otherwise return to step A realizes the disposable reading and analysis of whole parameters.
Preferably, described by school electric energy meter apparent energyWherein Pmsr is by school electricity
Energy table measures active power, and Qmsr is to measure reactive power by school electric energy meter.
Preferably, described initialize by school electric energy meter, specially：
The host computer being connected respectively with standard scale and by school electric energy meter sends initialization command, initially to by school electric energy meter
Change by school electric energy meter, it is made to use acquiescence calibration parameter.
Claims (10)
1. a kind of method of single-point power method calibration electric energy meter error, it is characterised in that include the following steps：
A, apply voltage, the electric current that power factor is 0.5L to by school electric energy meter；
B, initialization is by school electric energy meter；
C, voltage, electric current, split-phase active power and the split-phase reactive power of standard scale are obtained；
D, voltage error is calculated according to formula Uer=Umsr/Uexp-1, is missed according to formula Ier=Imsr/Iexp-1 calculating currents
Difference calculates power error according to formula Per=Smsr/Sexp-1, and calculating phase according to formula Pher=Pmsr/Pexp-1 misses
Difference, and complete error correction according to errors value is calculated；
In formula, Uer is by school electric energy meter voltage error, and Umsr, Uexp are respectively to measure voltage and standard scale electricity by school electric energy meter
Pressure；Ier is by school electrical energy meter electricity stream error, and Imsr, Iexp are respectively to measure electric current and standard scale electric current by school electric energy meter；Per
For by school electric energy meter power error, Smsr, Sexp are respectively by school electric energy meter apparent energy and standard scale apparent energy；Pher is
By school phase error of energy meter, Pmsr, Pexp are respectively to measure active power and standard scale active power by school electric energy meter.
2. the method for single-point power method calibration electric energy meter error according to claim 1, it is characterised in that：Respectively with standard
The host computer that table is connected with by school electric energy meter obtains voltage, electric current, split-phase active power and the split-phase reactive power of standard scale, and
It sends it to by school electric energy meter, each error amount is calculated according to step D by school electric energy meter, and certainly according to calculating errors value
It is dynamic to complete error correction.
3. the method for single-point power method calibration electric energy meter error according to claim 2, which is characterized in that the method is also
Including：
Host computer reads voltage error, current error and the power error after being calibrated by school electric energy meter, analyses whether that calibration is qualified,
If qualified, terminate this calibration；Otherwise return to step A.
4. the method for single-point power method calibration electric energy meter error according to claim 1, it is characterised in that：It is described electric by school
It can table apparent energyWherein Pmsr is to measure active power by school electric energy meter, and Qmsr is by school
Electric energy meter measures reactive power.
5. the method for single-point power method calibration electric energy meter error according to claim 1, which is characterized in that the initialization
By school electric energy meter, specially：
The host computer being connected respectively with standard scale and by school electric energy meter sends initialization command to by school electric energy meter, initializes quilt
School electric energy meter makes it use acquiescence calibration parameter.
6. a kind of method of single-point power method calibration electric energy meter error, it is characterised in that include the following steps：
A, apply voltage, the electric current that power factor is 0.5L to by school electric energy meter；
B, initialization is by school electric energy meter；
C, voltage, electric current, split-phase active power and the split-phase reactive power of standard scale are obtained；
D, voltage error is calculated according to formula Uer=Umsr/Uexp-1, is missed according to formula Ier=Imsr/Iexp-1 calculating currents
Difference calculates power error, according to formula Pher=1/ (1+Per) × Pmsr/Pexp-1 according to formula Per=Smsr/Sexp-1
Phase error is calculated, and error correction is completed according to errors value is calculated；
In formula, Uer is by school electric energy meter voltage error, and Umsr, Uexp are respectively to measure voltage and standard scale electricity by school electric energy meter
Pressure；Ier is by school electrical energy meter electricity stream error, and Imsr, Iexp are respectively to measure electric current and standard scale electric current by school electric energy meter；Per
For by school electric energy meter power error, Smsr, Sexp are respectively by school electric energy meter apparent energy and standard scale apparent energy；Pher is
By school phase error of energy meter, Pmsr, Pexp are respectively to measure active power and standard scale active power by school electric energy meter.
7. the method for single-point power method calibration electric energy meter error according to claim 6, it is characterised in that：Respectively with standard
The host computer that table is connected with by school electric energy meter obtains voltage, electric current, split-phase active power and the split-phase reactive power of standard scale, and
It sends it to by school electric energy meter, each error amount is calculated according to step D by school electric energy meter, and certainly according to calculating errors value
It is dynamic to complete error correction.
8. the method for single-point power method calibration electric energy meter error according to claim 7, which is characterized in that the method is also
Including：
Host computer reads voltage error, current error and the power error after being calibrated by school electric energy meter, analyses whether that calibration is qualified,
If qualified, terminate this calibration；Otherwise return to step A.
9. the method for single-point power method calibration electric energy meter error according to claim 6, it is characterised in that：It is described electric by school
It can table apparent energyWherein Pmsr is to measure active power by school electric energy meter, and Qmsr is by school
Electric energy meter measures reactive power.
10. the method for single-point power method calibration electric energy meter error according to claim 6, which is characterized in that described initial
Change by school electric energy meter, specially：
The host computer being connected respectively with standard scale and by school electric energy meter sends initialization command to by school electric energy meter, initializes quilt
School electric energy meter makes it use acquiescence calibration parameter.
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| CN109298379A (en) * | 2018-12-06 | 2019-02-01 | 国网四川省电力公司电力科学研究院 | A kind of recognition methods of the intelligent electric meter site error exception based on data monitoring |
| CN109407042A (en) * | 2018-12-27 | 2019-03-01 | 深圳市德帮能源科技有限公司 | A kind of method of calibration of intelligent electric meter |
| CN109541520A (en) * | 2018-11-13 | 2019-03-29 | 国网四川省电力公司绵阳供电公司 | The split-phase calculating method of electric energy metering device failure wrong electric energy |
| CN109738849A (en) * | 2019-03-08 | 2019-05-10 | 威胜集团有限公司 | Universal quick calibration method for single-phase electric energy meter |
| CN111413661A (en) * | 2020-05-06 | 2020-07-14 | 郑州万特电气股份有限公司 | Detection method for instrument constant test by adopting standard meter method |
| CN111896909A (en) * | 2020-07-16 | 2020-11-06 | 河南省计量科学研究院 | Electric energy meter error correction method and device |
| CN112230179A (en) * | 2020-05-06 | 2021-01-15 | 青岛鼎信通讯股份有限公司 | MSP430F 47187-based calibration method |
| CN113774471A (en) * | 2021-09-06 | 2021-12-10 | 吉林江机特种工业有限公司 | Current and voltage parameter online calibration method based on electroplating automatic production line |
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| CN111413661A (en) * | 2020-05-06 | 2020-07-14 | 郑州万特电气股份有限公司 | Detection method for instrument constant test by adopting standard meter method |
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| CN111413661B (en) * | 2020-05-06 | 2022-03-29 | 郑州万特电气股份有限公司 | Detection method for instrument constant test by adopting standard meter method |
| CN111896909A (en) * | 2020-07-16 | 2020-11-06 | 河南省计量科学研究院 | Electric energy meter error correction method and device |
| CN113774471A (en) * | 2021-09-06 | 2021-12-10 | 吉林江机特种工业有限公司 | Current and voltage parameter online calibration method based on electroplating automatic production line |
| CN113774471B (en) * | 2021-09-06 | 2024-05-10 | 吉林江机特种工业有限公司 | Current and voltage parameter online calibration method based on electroplating automation production line |
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Application publication date: 20180921 |