CN108594160A - A kind of correction method of electric energy meter - Google Patents
A kind of correction method of electric energy meter Download PDFInfo
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- CN108594160A CN108594160A CN201810397987.3A CN201810397987A CN108594160A CN 108594160 A CN108594160 A CN 108594160A CN 201810397987 A CN201810397987 A CN 201810397987A CN 108594160 A CN108594160 A CN 108594160A
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- electric energy
- energy meter
- active power
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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
Abstract
The present invention relates to a kind of correction methods of electric energy meter, by electric energy meter under the premise of judging itself to meet calibration condition, measurement channel between electric energy meter and stage body and the corresponding active power value of measurement channel are obtained, realizes the judgement for being in correcting gain point or corrected power bias point to itself；Electric energy meter according to priority gained measurement channel corresponding to circuit voltage, active power, reactive power and electric current register value respectively obtain the phase error that electric energy meter is under different conditions, phase compensation value, active power error and active power offset, and phase compensation value is written to the active power gain register of electric energy meter, active power offset is written in the active power offset register of electric energy meter, the phase compensation value and active power offset by stage body calculating electric energy meter are no longer needed in this way, switch to electric energy meter and independently calculates each offset, it avoids between electric energy meter and stage body for cumbersome communication caused by each compensation value calculation, improve calibration efficiency.
Description
Technical field
The present invention relates to electric energy meter field more particularly to a kind of correction methods of electric energy meter.
Background technology
As the most commonly used publicly-owned infrastructure of country is laid out in city, electric system is in national economy social development
It is most important.In the power system, the calibration work of electric energy meter is particularly important, and can be related to electric energy meter normally, accurately obtain
Take the electricity consumption data at family.
Traditional electric energy meter calibrating method is the chip register value sent by host computer in command frame copy reading electric energy meter, by
The register value of electric energy meter is compared with stage body calibration value and calculates error by stage body, then is calculated according to errors by stage body
Go out offset, and offset is combined in the register for being sent to electric energy meter in command frame and is compensated.But traditional electricity
Can the whole process of table correction method need between stage body and electric energy meter that continually interaction data, communication process are cumbersome so that school
Table process is time-consuming longer, reduces calibration efficiency.
Invention content
The technical problem to be solved by the present invention is to provide a kind of correction method of electric energy meter for the above-mentioned prior art.It should
The correction method of electric energy meter independently calculates the phase compensation value and active power offset of itself by electric energy meter, avoids electricity
The cumbersome communication that can occur for each compensation value calculation between table and stage body, improves calibration efficiency.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of correction method of electric energy meter, for real
The auto-adjustment operation of existing electric energy meter, which is characterized in that the correction method of the electric energy meter includes the following steps：
Step 1, it connects electric energy meter and stage body, the electric energy meter judges whether itself meets calibration condition：At electric energy meter
When factory's internal schema and short circuit electric energy meter calibrating interface, judges that the electric energy meter meets calibration condition, be transferred to step 2；Otherwise, not
Execute electric energy meter calibrating operation；
Step 2, the electric energy meter has set calibration mark, obtains measurement channel of the electric energy meter itself between stage body, and read
The active power value corresponding to measurement channel is taken, step 3 is transferred to；
Step 3, active power value of the electric energy meter corresponding to measurement channel, to the current state of electric energy meter itself
It judges：
When judging that electric energy meter current state is in correcting gain point, it is transferred to step 4；When judging at electric energy meter current state
When corrected power bias point, it is transferred to step 7；It is correcting gain point when judging that electric energy meter current state is both in, not also in
When corrected power bias point, it is transferred to step 1；
Step 4, the electric energy meter executes circuit initialization process for itself, reads current loop corresponding to measurement channel
Voltage, active power, reactive power and electric current register value, be transferred to step 5；
Step 5, the electric energy meter is according to the voltage of the read current loop of step 4, active power, reactive power and electric current
Register value calculates phase error and phase compensation value, and phase compensation register is written in gained phase compensation value, is transferred to step
Rapid 6；
Step 6, the electric energy meter reads again voltage, active power, the idle work(of current loop corresponding to measurement channel
Active power gain error and active power gain compensation value is calculated in rate and electric current register value, and gained is active
Power gain offset is written to active power gain register, is transferred to step 9；
Step 7, active power offset register is done initialization process by the electric energy meter, and is read corresponding to measurement channel
Voltage, active power, reactive power and the electric current register value of current loop；
Step 8, the electric energy meter is according to the voltage of the read current loop of step 7, active power, reactive power and electric current
Register value, calculates active power biased error and active power bias compensation value, and by gained active power bias compensation value
It is written to active power offset register, is transferred to step 9；
Step 9, the calibration mark of the electric energy meter is removed, and is transferred to step 1.
With improvement, in the correction method of the electric energy meter, the phase error computation mode in step 5 is as follows：
Wherein,Indicate that phase error, P indicate that active power, Q indicate that apparent energy, u indicate the phase of the stage body
Point value；
Further, in the correction method of the electric energy meter, the phase compensation value calculation in step 5 is such as
Under：
Wherein,Indicate phase compensation value,Indicate that phase error, asin () expressions negate sine value.
Again with improvement, in the correction method of the electric energy meter, the active power gain error calculating side in step 6
Formula is as follows：
Wherein, △ PGainExpression active power gain error, P expression active power, X representation theory power register values,U indicates that the rated voltage of electric energy meter, I indicate that the rated current of electric energy meter, α indicate power conversion coefficient.
Further, in the correction method of the electric energy meter, the active power gain compensation value in step 6 calculates
Mode is as follows：
Wherein,Indicate active power gain compensation value, △ PGainIndicate active power gain error.
Again with improvement, in the correction method of the electric energy meter, the active power biased error calculating side in step 8
Formula is as follows：
Wherein, △ PBiasingIndicate that active power biased error, P indicate active power, X representation theory power register values.
Further, in the correction method of the electric energy meter, the active power bias compensation value in step 8 calculates
Mode is as follows：
Wherein,Indicate active power bias compensation value, △ PBiasingIndicate active power biased error.
Again with improvement, in the correction method of the electric energy meter, in step 3, when the wattful power corresponding to measurement channel
When rate value is between section (0.5 × 0.7 × X, 0.5 × 0.15 × X), judge that electric energy meter current state is in correcting gain point；When
When active power value corresponding to measurement channel is between section (0.05 × 0.7 × X, 0.05 × 1.3 × X), judge that electric energy meter is worked as
Preceding state is in corrected power bias point, wherein X representation theory power register values.
Further, in the correction method of the electric energy meter, in step 1, the stage body is in the Ib points of 0.5L；u
=0.5.
It improves again, in the correction method of the electric energy meter, includes in step 4, step 6 and step 7：Work as reading
Measurement channel corresponding at least have one in the voltage of current loop, active power, reactive power and electric current register value
When except corresponding default allowable fluctuation range, the electric energy meter returns to the step of reading failure information.
Compared with the prior art, the advantages of the present invention are as follows：
First, the present invention obtains the electric energy meter and platform by electric energy meter under the premise of judging itself to meet calibration condition
The active power value corresponding to measurement channel and the measurement channel between body, realization are in correcting gain point to oneself state
Or the judgement of corrected power bias point；Electric energy meter is according to the voltage in circuit, active power, nothing corresponding to priority gained measurement channel
Work(power and electric current register value respectively obtain the phase error that electric energy meter is under different conditions, phase compensation value, wattful power
Rate error and active power offset, and phase compensation value is written to the active power gain register of electric energy meter, will have
Reactive power compensator value is written in the active power offset register of electric energy meter, no longer needs to calculate electric energy meter by stage body in this way
Phase compensation value and active power offset, but switch to each compensation that the electric energy meter is independently calculated by electric energy meter itself
Value, avoids the cumbersome signal intelligence occurred for each compensation value calculation between electric energy meter and stage body, improves calibration efficiency；
Secondly, the present invention passes through for the voltage of current loop corresponding to measurement channel, active power, reactive power and electricity
Corresponding default allowable fluctuation range is respectively set in stream registers value, it is thus achieved that being filtered to each signal so that institute
Calibration error is more accurate, it is therefore prevented that voltage and current fluctuation the unfavorable interference that is brought to electric energy meter calibrating process.
Description of the drawings
Fig. 1 is the correction method flow diagram of electric energy meter in the embodiment of the present invention.
Specific implementation mode
Below in conjunction with attached drawing embodiment, present invention is further described in detail.
As shown in Figure 1, the correction method of electric energy meter has for realizing the auto-adjustment operation of electric energy meter in the present embodiment
Body, the correction method of the electric energy meter includes the following steps：
Step 1, it connects electric energy meter and stage body, electric energy meter judges whether itself meets calibration condition：When electric energy meter is in factory
When internal schema and short circuit electric energy meter calibrating interface, judges that the electric energy meter meets calibration condition, be transferred to step 2；Otherwise, it not executes
Electric energy meter calibrating operates；Wherein, in the step 1, the stage body being connect with electric energy meter is in the Ib points of 0.5L, can make in this way
Stage body is in optimal school phase error point, facilitates and executes the work of mass calibration；Certainly, stage body can also be in as needed
The Ib points of 0.8L.
Step 2, electric energy meter has set calibration mark, obtains measurement channel of the electric energy meter itself between stage body, and read meter
The active power value corresponding to channel is measured, step 3 is transferred to；Wherein, active power value mentioned here refers to electric energy table register
Interior active power value；
Step 3, active power value of the electric energy meter corresponding to measurement channel makes the current state of electric energy meter itself
Judge：
When judging that electric energy meter current state is in correcting gain point, it is transferred to step 4；When judging at electric energy meter current state
When corrected power bias point, it is transferred to step 7；It is correcting gain point when judging that electric energy meter current state is both in, not also in
When corrected power bias point, it is transferred to step 1；
Specifically, in the present embodiment, electric energy meter judges whether its current state increases in correction in the following way
Benefit point or corrected power bias point：
When active power value corresponding to the measurement channel is between section (0.5 × 0.7 × X, 0.5 × 0.15 × X), judge
Electric energy meter current state is in correcting gain point；Active power value corresponding to the measurement channel between section (0.05 × 0.7 ×
X, 0.05 × 1.3 × X) when, judge that electric energy meter current state is in corrected power bias point, wherein X representation theory power is deposited
Device value；U indicates that the rated voltage of electric energy meter, I indicate that the rated current of electric energy meter, α indicate power conversion coefficient；
Step 4, electric energy meter executes circuit initialization process for itself, reads the electricity of current loop corresponding to measurement channel
Pressure, active power, reactive power and electric current register value, are transferred to step 5；
Step 5, electric energy meter is deposited according to the voltage of the read current loop of step 4, active power, reactive power and electric current
Device value calculates phase error and phase compensation value, and phase compensation register is written in gained phase compensation value, is transferred to step 6；
Wherein, the phase error in the present embodiment obtains in the following way：
Wherein,Indicate that phase error, P indicate that active power, Q indicate that apparent energy, u indicate the phase points of stage body
Value；For example, when the phase point of stage body is in the Ib points of 0.5L, then u=0.5 at this time；The phase point of stage body is in the Ib of 0.8L
When point, then u=0.8 at this time；
In the present embodiment, the phase compensation value calculation in step 5 is as follows：
Wherein,Indicate phase compensation value,Indicate that gained phase error, asin () expressions negate sine value；
Step 6, electric energy meter read again the voltage of current loop corresponding to measurement channel, active power, reactive power and
Electric current register value, is calculated active power gain error and active power gain compensation value, and by gained active power
Gain compensation value is written to active power gain register, is transferred to step 9；Wherein, the active power gain in the present embodiment misses
Difference obtains in the following way：
Wherein, △ PGainExpression active power gain error, P expression active power, X representation theory power register values,U indicates that the rated voltage of electric energy meter, I indicate that the rated current of electric energy meter, α indicate power conversion coefficient；
In the present embodiment, the active power gain compensation value in step 6 obtains in the following way：
Wherein,Indicate active power gain compensation value, △ PGainIndicate active power gain error；
Step 7, active power offset register is done initialization process by electric energy meter, and is read current corresponding to measurement channel
Voltage, active power, reactive power and the electric current register value in circuit；
Step 8, electric energy meter is deposited according to the voltage of the read current loop of step 7, active power, reactive power and electric current
Device value calculates active power biased error and active power bias compensation value, and gained active power bias compensation value is written
To active power offset register, it is transferred to step 9；Wherein, the calculation of active power biased error is as follows in the step 8：
Wherein, △ PBiasingIndicate that active power biased error, P indicate active power, X representation theory power register values；
In the present embodiment, the active power bias compensation value calculation in step 8 is as follows：
Wherein,Indicate active power bias compensation value, △ PBiasingIndicate active power biased error；
Step 9, the calibration mark of electric energy meter is removed, and is transferred to step 1.
Certainly, in the present embodiment, step 4, step 6 and step 7 can also each include：When the measurement channel institute of reading
It corresponds in voltage, active power, reactive power and the electric current register value of current loop and at least has one positioned at corresponding pre-
If when except allowable fluctuation range, electric energy meter returns to the step of reading failure information.That is, each step described in here
In, respectively it is correspondingly provided with one in advance for the voltage of current loop, active power, reactive power and electric current register value
If allowable fluctuation range；For example, once current loop voltage is more than its corresponding default allowable fluctuation range, electric energy meter at this time
Reading failure information will be returned.Certainly, if other parameters (such as active power, reactive power or the electric current of current loop
Register value) it is not within its corresponding default allowable fluctuation range, electric energy meter will also return to reading failure information.It needs
Illustrate, the embodiment by setting respectively for the voltage of current loop, active power, reactive power and electric current register value
Corresponding default allowable fluctuation range is set, it is thus achieved that being filtered to each signal so that gained calibration error is more accurate
Really, it is therefore prevented that voltage and current fluctuation the unfavorable interference that is brought to electric energy meter calibrating process.
In addition, the electric energy meter in the present embodiment can also successively execute step 4 and step 6 respectively according to prefixed time interval
In for the voltage of current loop corresponding to measurement channel, the read operation of active power, reactive power and electric current register value.
Although the preferred embodiment of the present invention described in detail above, it is to be clearly understood that for this field
Technical staff for, the invention may be variously modified and varied.Appoint made by all within the spirits and principles of the present invention
What modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of correction method of electric energy meter operates, which is characterized in that the electric energy meter for realizing the auto-adjustment of electric energy meter
Correction method include the following steps：
Step 1, it connects electric energy meter and stage body, the electric energy meter judges whether itself meets calibration condition：When electric energy meter is in factory
When internal schema and short circuit electric energy meter calibrating interface, judges that the electric energy meter meets calibration condition, be transferred to step 2；Otherwise, it not executes
Electric energy meter calibrating operates；
Step 2, the electric energy meter has set calibration mark, obtains measurement channel of the electric energy meter itself between stage body, and read meter
The active power value corresponding to channel is measured, step 3 is transferred to；
Step 3, active power value of the electric energy meter corresponding to measurement channel makes the current state of electric energy meter itself
Judge：
When judging that electric energy meter current state is in correcting gain point, it is transferred to step 4；When judging that electric energy meter current state is in school
When positive bias point, it is transferred to step 7；It is correcting gain point when judging that electric energy meter current state is both in, not also in correction
When power bias point, it is transferred to step 1；
Step 4, the electric energy meter executes circuit initialization process for itself, reads the electricity of current loop corresponding to measurement channel
Pressure, active power, reactive power and electric current register value, are transferred to step 5；
Step 5, the electric energy meter is deposited according to the voltage of the read current loop of step 4, active power, reactive power and electric current
Device value calculates phase error and phase compensation value, and phase compensation register is written in gained phase compensation value, is transferred to step 6；
Step 6, the electric energy meter read again the voltage of current loop corresponding to measurement channel, active power, reactive power and
Electric current register value, is calculated active power gain error and active power gain compensation value, and by gained active power
Gain compensation value is written to active power gain register, is transferred to step 9；
Step 7, active power offset register is done initialization process by the electric energy meter, and is read current corresponding to measurement channel
Voltage, active power, reactive power and the electric current register value in circuit；
Step 8, the electric energy meter is deposited according to the voltage of the read current loop of step 7, active power, reactive power and electric current
Device value calculates active power biased error and active power bias compensation value, and gained active power bias compensation value is written
To active power offset register, it is transferred to step 9；
Step 9, the calibration mark of the electric energy meter is removed, and is transferred to step 1.
2. the correction method of electric energy meter according to claim 1, which is characterized in that the phase error computation in step 5
Mode is as follows：
Wherein,Indicate that phase error, P indicate that active power, Q indicate that apparent energy, u indicate the phase points of the stage body
Value.
3. the correction method of electric energy meter according to claim 2, which is characterized in that the phase compensation value meter in step 5
Calculation mode is as follows：
Wherein,Indicate phase compensation value,Indicate that phase error, asin () expressions negate sine value.
4. the correction method of electric energy meter according to claim 1, which is characterized in that the active power gain in step 6
Error calculation mode is as follows：
Wherein, △ PGainExpression active power gain error, P expression active power, X representation theory power register values,
U indicates that the rated voltage of electric energy meter, I indicate that the rated current of electric energy meter, α indicate power conversion coefficient.
5. the correction method of electric energy meter according to claim 4, which is characterized in that the active power gain in step 6
Compensation value calculation mode is as follows：
Wherein, GainP gainsIndicate active power gain compensation value, △ PGainIndicate active power gain error.
6. the correction method of electric energy meter according to claim 5, which is characterized in that the active power biasing in step 8
Error calculation mode is as follows：
Wherein, △ PBiasingIndicate that active power biased error, P indicate active power, X representation theory power register values.
7. the correction method of electric energy meter according to claim 6, which is characterized in that in step 3, corresponding to measurement channel
Active power value between section (0.5 × 0.7 × X, 0.5 × 0.15 × X) when, judge electric energy meter current state be in correction increase
Beneficial point；When active power value corresponding to the measurement channel is between section (0.05 × 0.7 × X, 0.05 × 1.3 × X), electricity is judged
Energy table current state is in corrected power bias point, wherein X representation theory power register values.
8. the correction method of electric energy meter according to claim 2, which is characterized in that the stage body in the step 1 is in 0.5L
Ib points；U=0.5.
9. the correction method of electric energy meter according to claim 1, which is characterized in that in step 4, step 6 and step 7
Including：When in the voltage of current loop corresponding to the measurement channel of reading, active power, reactive power and electric current register value extremely
When having one less except corresponding default allowable fluctuation range, the electric energy meter returns to the step of reading failure information.
10. the correction method of electric energy meter according to claim 1, which is characterized in that the electric energy meter is according between preset time
It is executed respectively in step 4 and step 6 for voltage, active power, the idle work(of current loop corresponding to measurement channel every successively
The read operation of rate and electric current register value.
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| CN201810397987.3A CN108594160A (en) | 2018-04-28 | 2018-04-28 | A kind of correction method of electric energy meter |
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Cited By (7)
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| CN109901099A (en) * | 2019-03-04 | 2019-06-18 | 宁波三星医疗电气股份有限公司 | A kind of voltage change automatic compensating method of electric energy meter |
| CN110907886A (en) * | 2019-12-27 | 2020-03-24 | 广东电科院能源技术有限责任公司 | Error detection system and method for electric energy of electric energy meter |
| CN111175575A (en) * | 2020-01-07 | 2020-05-19 | 宁波市计量测试研究院（宁波市衡器管理所、宁波新材料检验检测中心） | Method for improving power factor angle measurement precision of standard electric energy meter |
| 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 |
| CN112596017A (en) * | 2020-11-30 | 2021-04-02 | 华立科技股份有限公司 | Single-phase electric energy meter intelligent calibration method based on big data |
| CN113311377A (en) * | 2021-05-18 | 2021-08-27 | 河南许继仪表有限公司 | Current frequency compensation method and system for electric energy meter |
| CN114545072A (en) * | 2021-12-27 | 2022-05-27 | 杭州明特科技有限公司 | Reactive power compensation method, electric energy meter and computer readable storage medium |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901099A (en) * | 2019-03-04 | 2019-06-18 | 宁波三星医疗电气股份有限公司 | A kind of voltage change automatic compensating method of electric energy meter |
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| CN111175575A (en) * | 2020-01-07 | 2020-05-19 | 宁波市计量测试研究院（宁波市衡器管理所、宁波新材料检验检测中心） | Method for improving power factor angle measurement precision of standard electric energy meter |
| 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 |
| CN112596017A (en) * | 2020-11-30 | 2021-04-02 | 华立科技股份有限公司 | Single-phase electric energy meter intelligent calibration method based on big data |
| CN113311377A (en) * | 2021-05-18 | 2021-08-27 | 河南许继仪表有限公司 | Current frequency compensation method and system for electric energy meter |
| CN114545072A (en) * | 2021-12-27 | 2022-05-27 | 杭州明特科技有限公司 | Reactive power compensation method, electric energy meter and computer readable storage medium |
| CN114545072B (en) * | 2021-12-27 | 2022-11-08 | 杭州明特科技有限公司 | Reactive power compensation method, electric energy meter and computer readable storage medium |
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Application publication date: 20180928 |