CN107085195A - The method and system that a kind of transformer and electric energy meter to plant stand is matched - Google Patents
The method and system that a kind of transformer and electric energy meter to plant stand is matched Download PDFInfo
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- CN107085195A CN107085195A CN201710245718.0A CN201710245718A CN107085195A CN 107085195 A CN107085195 A CN 107085195A CN 201710245718 A CN201710245718 A CN 201710245718A CN 107085195 A CN107085195 A CN 107085195A
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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
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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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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Abstract
The present invention relates to the method and system that a kind of transformer and electric energy meter to plant stand is matched, the transformer and clearing class stoichiometric point electric energy meter that methods described includes first to plant stand are matched, then the transformer to plant stand and examination class calculate point electric energy meter and matched.The step of transformer and stoichiometric point electric energy meter to plant stand are matched be：Calculate the elementary error of transformer combined error and the electric energy meter of stoichiometric point and be added, form transformer and electric energy meter combined error matching table；Determine the error threshold of combined error matching table, and screen the combined error met in the combined error matching table of error threshold scope and determine the quantitative value of the combined error for meeting condition, the quantitative value that then quantitative value of combined error is more than to 0 is arranged according to order from big to small；Determine that stoichiometric point installs the numbering of electric energy meter according to ranking results, and specify the installation site with the corresponding electric energy meter of numbering.
Description
Technical field
The present invention relates to electrotechnical instrument and meter industry, and more particularly, to a kind of transformer and electric energy to plant stand
The method and system that table is matched.
Background technology
Electric power transmission line loss is otherwise known as technical loss by theory wire loss and management line loss composition, theory wire loss, i.e.,
The loss that transmission facility is produced.Management line loss then mainly causes by electric power meter error, for selling the not same period.Now with remote
The popularization of square Electric Energy Acquisition System (TMR), stoichiometric point clearing above the provincial level have been realized for selling the same period, therefore reduction management line loss
Major measure be reduce electric power meter composition error.Electric power meter composition error refers to voltage transformer, electricity
Current transformer, secondary circuit voltage drop, the combination of stoichiometric point electric energy meter error.At present, transformer, secondary circuit, gate energy meter
Error-detecting is separated progress, and transformer and electric energy meter are random combine, transformer and stoichiometric point electric energy meter during in-site installation
Random installation does not take into full account combination error, does not form matching strategy to reduce the error of stoichiometric point.
At present, metering points of electric energy can be divided into clearing class stoichiometric point and examination class stoichiometric point.Settling accounts class stoichiometric point is used for trade
Clearing, examination class stoichiometric point, which is used for internal economies technical indicator, to be examined, because clearing class stoichiometric point is related to power plant and power network, no
Clearing between same power grid enterprises, power grid enterprises and user, it is therefore necessary to which the electric energy metrical of class stoichiometric point is settled accounts in reduction first
Device combined error, then reduces the combined error for examining class stoichiometric point further according to matching result.
The content of the invention
In order to which the transformer and stoichiometric point electric energy meter random installation that solve background technology presence do not take into full account the group of the two
The problem of closing error, the present invention provides the method and system that a kind of transformer and electric energy meter to plant stand is matched, the side
Method and system can reduce the combined error of stoichiometric point by matching algorithm, and then mitigate influence of the management line loss to line loss calculation.
The method that the transformer and electric energy meter to plant stand is matched includes：
Calculate the combined error γ of every group of voltage transformer summation current transformer one by one according to testing sitehIt is every with stoichiometric point
The elementary error γ of individual electric energy metercAnd γ, form the combined error matching table of each electric energy meter of stoichiometric point and every group of transformer；
The error threshold E of each electric energy meter of stoichiometric point and the combined error matching table of every group of transformer is determined, screening is met
Combined error and determination in each combination matching table of the error threshold scope meet the quantitative value of the combined error of condition,
Then the quantitative value of combined error is more than 0 stoichiometric point electric energy meter according to the quantitative value of combined error size, with from big
Arranged to small order；
Determine that stoichiometric point installs the numbering of electric energy meter according to ranking results, and specify the installation with the corresponding electric energy meter of numbering
Position.
Preferably, the stoichiometric point in methods described includes clearing class stoichiometric point and examination class stoichiometric point.
Preferably, the transformer and electric energy meter to plant stand, which carries out matching, includes the transformer and clearing class meter to plant stand
Amount point electric energy meter is matched and the transformer to plant stand is matched with examination class stoichiometric point electric energy meter, and the order of matching
It is that first the transformer and clearing class stoichiometric point electric energy meter of plant stand are matched, then the transformer to plant stand and examination class stoichiometric point
Electric energy meter is matched.
Preferably, the combined error and stoichiometric point of every group of voltage transformer summation current transformer are calculated one by one according to testing site
Each electric energy meter elementary error sum, formed each electric energy meter of stoichiometric point and every group of transformer combined error matching table it
Before include：
The combined error of every group of voltage transformer summation current transformer is asked for by ct calibrating error calculation formula
γh, calculation formula is：
γ h=1/3 (fI1+fV1+fI2+fV2+fI3+fV3)
+0.0097(δI1-δV1+δI2-δV2+δI3-δV3) tan φ (%)
Wherein, fI1、fI2、fI3Poor, the f for the ratio of current transformerV1、fV2、fV3Poor, the δ for the ratio of voltage transformerI1、δI2、
δI3For the angular difference of current transformer, δV1、δV2、δV3For the angular difference of voltage transformer, tan φ be voltage and current and phase difference just
Cut value；
The elementary error γ of stoichiometric point electric energy meter is asked for according to electric power meter comprehensive error computation formulac, calculate public
Formula is：
Wherein, m is actual measurement umber of pulse, m0For presetting pulse number.
Preferably, the error threshold E of each electric energy meter of stoichiometric point and the combined error matching table of every group of transformer, sieve are determined
The combined error and determination that are full in each combination matching table of the foot error threshold scope meet the combined error of condition
Quantitative value, including：
Calculate the average value of all combined errors in the electric energy meter combined error matching table of transformer and stoichiometric pointAnd standard
Poor σ；
According to Pauta criterion setting error threshold E=3 σ；
Select to meet in combined error matching tableAll combined errors and determine combined error
Quantity.
Preferably, when determined combination mistake in an electric energy meter of stoichiometric point and the combined error matching table of multigroup transformer
When the quantity of difference is equal, the standard of multiple testing sites in the equal each combined error matching table of quantity of combined error is calculated
Difference, and electric energy meter is installed on one group of minimum transformer of standard deviation, the standard deviation calculation formula is as follows：
Wherein, S is the standard deviation after calculating, and n is testing site quantity, γiFor the combined error under different tests point,For
The average value of all testing site combined error sums.
According to another aspect of the present invention, the present invention provide a kind of transformer and electric energy meter to plant stand matched be
System, the system includes：
Combined error matching table determining unit, it is used to calculate every group of voltage transformer one by one according to testing site and electric current is mutual
The combined error γ of sensorhWith the elementary error γ of each electric energy meter of stoichiometric pointcAnd γ, formed each electric energy meter of stoichiometric point
With the combined error matching table of every group of transformer；
Error threshold determining unit, it is used to determine that the combined error of each electric energy meter of stoichiometric point and every group of transformer is matched
The error threshold E of table, screening meets the combined error in each combination matching table of the error threshold scope and determines to meet
The quantitative value of the combined error of condition, the electric energy meter that then quantitative value of combined error is more than to 0 stoichiometric point is missed according to combination
The size of the quantitative value of difference, is arranged with order from big to small；
Stoichiometric point electric energy meter determining unit, it is used to determine that stoichiometric point installs the numbering of electric energy meter according to ranking results, and
Specify the installation site with the corresponding electric energy meter of numbering.
Preferably, the stoichiometric point includes clearing class stoichiometric point and examination class stoichiometric point.
Preferably, the system carries out matching to the transformer and electric energy meter of plant stand includes the transformer to plant stand and clearing
Class stoichiometric point electric energy meter is matched and the transformer to plant stand is matched with examination class stoichiometric point electric energy meter, and matching
Order is that first the transformer and clearing class stoichiometric point electric energy meter of plant stand are matched, then the transformer to plant stand and examination class meter
Amount point electric energy meter is matched.
Preferably, the system also includes transformer combined error determining unit and stoichiometric point Basic Error of Energy Meter is determined
Unit, the transformer combined error determining unit is used to ask for every group of mutual induction of voltage by ct calibrating error calculation formula
The combined error γ of device summation current transformerh, calculation formula is：
γh=1/3 (fI1+fV1+fI2+fV2+fI3+fV3)
+0.0097(δI1-δV1+δI2-δV2+δI3-δV3) tan φ (%)
Wherein, fI1、fI2、fI3Poor, the f for the ratio of current transformerV1、fV2、fV3Poor, the δ for the ratio of voltage transformerI1、δI2、
δI3For the angular difference of current transformer, δV1、δV2、δV3For the angular difference of voltage transformer, tan φ be voltage and current and phase difference just
Cut value；
Stoichiometric point Basic Error of Energy Meter determining unit is used to be asked for according to electric power meter comprehensive error computation formula
The elementary error γ of stoichiometric point electric energy meterc, calculation formula is：
Wherein, m is actual measurement umber of pulse, m0For presetting pulse number.
Preferably, error threshold determining unit determines that the combined error of each electric energy meter of stoichiometric point and every group of transformer is matched
The error threshold E of table, screening meets the combined error in each combination matching table of the error threshold scope and determines to meet
The quantitative value of the combined error of condition, including：
Calculate the average value of all combined errors in the electric energy meter combined error matching table of transformer and stoichiometric pointAnd standard
Poor σ；
According to Pauta criterion setting error threshold E=3 σ；
Select to meet in combined error matching tableAll combined errors and determine combined error
Quantity.
Preferably, in error threshold determining unit, when an electric energy meter of stoichiometric point is missed with the combination of multigroup transformer
When the quantity of determined combination error is equal in poor matching table, the equal each combined error pairing of the quantity of combined error is calculated
The standard deviation of multiple testing sites in table, and electric energy meter is installed on one group of minimum transformer of standard deviation, the standard deviation
Calculation formula is as follows：
Wherein, S is the standard deviation after calculating, and n is testing site quantity, γiFor the combined error under different tests point,For
The average value of all testing site combined error sums.
In summary, the method and system matched to the transformer and electric energy meter of plant stand that the present invention is provided is with plant stand
For unit, matching for electric energy meter and transformer is completed according to the installation process of plant stand electric power meter, matching process is with mutual inductance
The combined error of device and electric energy meter is starting point, forms transformer and the matching table of Basic Error of Energy Meter, and according to setting
Rule, therefrom screens satisfactory error information and is ranked up, reasonable according to the result of sequence then in conjunction with metering vertex type
The installation site of electric energy meter is arranged, so as to reduce influence of the electric power meter error to line loss calculation.
Brief description of the drawings
By reference to the following drawings, the illustrative embodiments of the present invention can be more fully understood by：
Fig. 1 is the flow of the method matched to the transformer and electric energy meter of plant stand of the specific embodiment of the invention
Figure；And
Fig. 2 is the structure of the system matched to the transformer and electric energy meter of plant stand of the specific embodiment of the invention
Figure.
Embodiment
The illustrative embodiments of the present invention are introduced with reference now to accompanying drawing, however, the present invention can use many different shapes
Formula is implemented, and it is to disclose at large and fully there is provided these embodiments to be not limited to embodiment described herein
The present invention, and fully pass on the scope of the present invention to person of ordinary skill in the field.For showing for being illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements are attached using identical
Icon is remembered.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has to person of ordinary skill in the field
It is common to understand implication.Further it will be understood that the term limited with usually used dictionary, is appreciated that and it
The linguistic context of association area has consistent implication, and is not construed as Utopian or excessively formal meaning.
Fig. 1 is the flow of the method matched to the transformer and electric energy meter of plant stand of the specific embodiment of the invention
Figure.As shown in figure 1, the method 100 that the transformer and electric energy meter to plant stand is matched is since step 101.
In step 101, the combined error γ of every group of voltage transformer summation current transformer is calculated one by one according to testing sitehWith
The elementary error γ of each electric energy meter of stoichiometric pointcAnd γ, form the combination of each electric energy meter of stoichiometric point and every group of transformer
Error matching table.In following table 1 into table 4, according to JJG1021-2007《Electric power mutual-inductor》Vertification regulation, voltage transformer and
Tables 1 and 2 is seen in current transformer elementary error testing site.According to JJG596-2012《Electronic type AC energy meter》Vertification regulation,
Basic Error of Energy Meter (forward and reverse active) testing site is shown in Table 3.By 1~table of table 3 combine after participation error matching basic mistake
Almost it is shown in Table 4.
The voltage transformer elementary error testing site of table 1
The current transformer elementary error testing site of table 2
The active elementary error of the electric energy meter of table 3 (forward and reverse active) testing site
The transformer of table 4 and the combination of Basic Error of Energy Meter testing site
In step 102, the error threshold of each electric energy meter of stoichiometric point and the combined error matching table of every group of transformer is determined
E, screening meets the combined error in each combination matching table of the error threshold scope and determination meets the combination mistake of condition
The quantitative value of difference, then the electric energy meter of the stoichiometric point by the quantitative value of combined error more than 0 is according to the quantitative value of combined error
Size, is arranged with order from big to small；
In step 103, determine that stoichiometric point installs the numbering of electric energy meter according to ranking results, and specify and the corresponding electricity of numbering
The installation site of energy table.
Preferably, the stoichiometric point in methods described includes clearing class stoichiometric point and examination class stoichiometric point.
Preferably, the transformer and electric energy meter to plant stand, which carries out matching, includes the transformer and clearing class meter to plant stand
Amount point electric energy meter is matched and the transformer to plant stand is matched with examination class stoichiometric point electric energy meter, and the order of matching
It is that first the transformer and clearing class stoichiometric point electric energy meter of plant stand are matched, then the transformer to plant stand and examination class stoichiometric point
Electric energy meter is matched.
Preferably, the combined error and stoichiometric point of every group of voltage transformer summation current transformer are calculated one by one according to testing site
Each electric energy meter elementary error sum, formed each electric energy meter of stoichiometric point and every group of transformer combined error matching table it
Before include：
The combined error of every group of voltage transformer summation current transformer is asked for by ct calibrating error calculation formula
γh, calculation formula is：
γh=1/3 (fI1+fV1+fI2+fV2+fI3+fV3)
+0.0097(δI1-δV1+δI2-δV2+δI3-δV3) tan φ (%)
Wherein, fI1、fI2、fI3Poor, the f for the ratio of current transformerV1、fV2、fV3Poor, the δ for the ratio of voltage transformerI1、δI2、
δI3For the angular difference of current transformer, δV1、δV2、δV3For the angular difference of voltage transformer, tan φ be voltage and current and phase difference just
Cut value；
The elementary error γ of stoichiometric point electric energy meter is asked for according to electric power meter comprehensive error computation formulac, calculate public
Formula is：
Wherein, m is actual measurement umber of pulse, m0For presetting pulse number.
Preferably, the error threshold E of each electric energy meter of stoichiometric point and the combined error matching table of every group of transformer, sieve are determined
The combined error and determination that are full in each combination matching table of the foot error threshold scope meet the combined error of condition
Quantitative value, including：
Calculate the average value of all combined errors in the electric energy meter combined error matching table of transformer and stoichiometric pointAnd mark
Quasi- difference σ；
According to Pauta criterion setting error threshold E=3 σ；
Select to meet in combined error matching tableAll combined errors and determine combined error
Quantity.
Preferably, when determined combination mistake in an electric energy meter of stoichiometric point and the combined error matching table of multigroup transformer
When the quantity of difference is equal, the standard of multiple testing sites in the equal each combined error matching table of quantity of combined error is calculated
Difference, and electric energy meter is installed on one group of minimum transformer of standard deviation, the standard deviation calculation formula is as follows：
Wherein, S is the standard deviation after calculating, and n is testing site quantity, γiFor the combined error under different tests point,For
The average value of all testing site combined error sums.
Fig. 2 is the structure of the system matched to the transformer and electric energy meter of plant stand of the specific embodiment of the invention
Figure.As shown in Fig. 2 the system 200 that the transformer and electric energy meter of the present invention to plant stand is matched includes combined error
Matching table determining unit 201, error threshold determining unit 202 and stoichiometric point electric energy meter determining unit 203.
Combined error matching table determining unit 201, it is used to calculate every group of voltage transformer and electricity one by one according to testing site
The combined error γ of current transformerhWith the elementary error γ of each electric energy meter of stoichiometric pointcAnd γ, formed stoichiometric point it is each electric
The combined error matching table of energy table and every group of transformer；
Error threshold determining unit 202, it is used for the combined error for determining each electric energy meter of stoichiometric point and every group of transformer
The error threshold E of matching table, screening meets combined error and determination in each combination matching table of the error threshold scope
The quantitative value of the combined error of condition is met, then the electric energy meter of the stoichiometric point by the quantitative value of combined error more than 0 is according to group
The size of the quantitative value of error is closed, is arranged with order from big to small；
Stoichiometric point electric energy meter determining unit 203, it is used to determine that stoichiometric point installs the numbering of electric energy meter according to ranking results,
And the specified installation site with the corresponding electric energy meter of numbering.
Preferably, the stoichiometric point includes clearing class stoichiometric point and examination class stoichiometric point.
Preferably, the system carries out matching to the transformer and electric energy meter of plant stand includes the transformer to plant stand and clearing
Class stoichiometric point electric energy meter is matched and the transformer to plant stand is matched with examination class stoichiometric point electric energy meter, and matching
Order is that first the transformer and clearing class stoichiometric point electric energy meter of plant stand are matched, then the transformer to plant stand and examination class meter
Amount point electric energy meter is matched
Preferably, the system also includes transformer combined error determining unit 204 and stoichiometric point Basic Error of Energy Meter
Determining unit 205, the transformer combined error determining unit 204 is used to ask for often by ct calibrating error calculation formula
The combined error γ of group voltage transformer summation current transformerh, calculation formula is：
γh=1/3 (fI1+fV1+fI2+fV2+fI3+fV3)
+0.0097(δI1-δV1+δI2-δV2+δI3-δV3) tan φ (%)
Wherein, fI1、fI2、fI3Poor, the f for the ratio of current transformerV1、fV2、fV3Poor, the δ for the ratio of voltage transformerI1、δI2、
δI3For the angular difference of current transformer, δV1、δV2、δV3For the angular difference of voltage transformer, tan φ be voltage and current and phase difference just
Cut value；
Stoichiometric point Basic Error of Energy Meter determining unit 205 is used to be asked according to electric power meter comprehensive error computation formula
Take the elementary error γ of stoichiometric point electric energy meterc, calculation formula is：
Wherein, m is actual measurement umber of pulse, m0For presetting pulse number.
Preferably, error threshold determining unit 202 determines the combined error of each electric energy meter of stoichiometric point and every group of transformer
The error threshold E of matching table, screening meets combined error and determination in each combination matching table of the error threshold scope
The quantitative value of the combined error of condition is met, including：
Calculate the average value of all combined errors in the electric energy meter combined error matching table of transformer and stoichiometric pointAnd standard
Poor σ；
According to Pauta criterion setting error threshold E=3 σ；
Select to meet in combined error matching tableAll combined errors and determine combined error
Quantity.
Preferably, in error threshold determining unit 202, when the combination of the electric energy meter and multigroup transformer of stoichiometric point
When the quantity of determined combination error is equal in error matching table, each combined error that the quantity of calculating combined error is equal is matched somebody with somebody
It is installed on to the standard deviation of multiple testing sites in table, and by electric energy meter on one group of minimum transformer of standard deviation, the standard
Poor calculation formula is as follows：
Wherein, S is the standard deviation after calculating, and n is testing site quantity, γiFor the combined error under different tests point,For
The average value of all testing site combined error sums.
Normally, all terms used in the claims are all solved according to them in the usual implication of technical field
Release, unless clearly defined in addition wherein.All references " one/described/be somebody's turn to do【Device, component etc.】" all it is opened ground
At least one example in described device, component etc. is construed to, unless otherwise expressly specified.Any method disclosed herein
Step need not all be run with disclosed accurate order, unless explicitly stated otherwise.
Claims (12)
1. a kind of method that transformer and electric energy meter to plant stand is matched, methods described includes：
Calculate the combined error γ of every group of voltage transformer summation current transformer one by one according to testing sitehWith each electricity of stoichiometric point
The elementary error γ of energy tablecAnd γ, form the combined error matching table of each electric energy meter of stoichiometric point and every group of transformer；
The error threshold E of each electric energy meter of stoichiometric point and the combined error matching table of every group of transformer is determined, screening meets described
Combined error and determination in each combination matching table of error threshold scope meet the quantitative value of the combined error of condition, then
By the quantitative value of combined error be more than 0 stoichiometric point electric energy meter according to the quantitative value of combined error size, with from big to small
Order arrangement；
Determine that stoichiometric point installs the numbering of electric energy meter according to ranking results, and specify the installation position with the corresponding electric energy meter of numbering
Put.
2. according to the method described in claim 1, it is characterised in that the stoichiometric point in methods described include clearing class stoichiometric point and
Examine class stoichiometric point.
3. according to the method described in claim 1, it is characterised in that the transformer and electric energy meter to plant stand carries out matching bag
Include the transformer and examination class stoichiometric point matched to the transformer and clearing class stoichiometric point electric energy meter of plant stand and to plant stand
Electric energy meter is matched, and the order of matching is that first the transformer and clearing class stoichiometric point electric energy meter of plant stand are matched, then
Transformer and examination class stoichiometric point electric energy meter to plant stand are matched.
4. according to the method described in claim 1, it is characterised in that calculate every group of voltage transformer and electricity one by one according to testing site
The combined error of current transformer and each electric energy meter of stoichiometric point elementary error and, formed each electric energy meter of stoichiometric point with it is every
Include before the combined error matching table of group transformer：
The combined error γ of every group of voltage transformer summation current transformer is asked for by ct calibrating error calculation formulah, calculate
Formula is：
γh=1/3 (fI1+fV1+fI2+fV2+fI3+fV3)
+0.0097(δI1-δV1+δI2-δV2+δI3-δV3) tan φ (%)
Wherein, fI1、fI2、fI3Poor, the f for the ratio of current transformerV1、fV2、fV3Poor, the δ for the ratio of voltage transformerI1、δI2、δI3For
The angular difference of current transformer, δV1、δV2、δV3For the angular difference of voltage transformer, tan φ are the tangent value of voltage and current and phase difference；
The elementary error γ of stoichiometric point electric energy meter is asked for according to electric power meter comprehensive error computation formulac, calculation formula is：
<mrow>
<msub>
<mi>&gamma;</mi>
<mi>c</mi>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>m</mi>
<mn>0</mn>
</msub>
<mo>-</mo>
<mi>m</mi>
</mrow>
<mi>m</mi>
</mfrac>
<mo>&times;</mo>
<mn>100</mn>
<mrow>
<mo>(</mo>
<mi>%</mi>
<mo>)</mo>
</mrow>
</mrow>
Wherein, m is actual measurement umber of pulse, m0For presetting pulse number.
5. according to the method described in claim 1, it is characterised in that determine the group of each electric energy meter of stoichiometric point and every group of transformer
The error threshold E of error matching table is closed, screening meets the combined error in each combination matching table of the error threshold scope
And determine to meet the quantitative value of the combined error of condition, including：
Calculate the average value of all combined errors in the electric energy meter combined error matching table of transformer and stoichiometric pointAnd standard deviation sigma；
According to Pauta criterion setting error threshold E=3 σ；
Select to meet in combined error matching tableAll combined errors and determine the quantity of combined error.
6. according to the method described in claim 1, it is characterised in that when the group of the electric energy meter and multigroup transformer of stoichiometric point
When the quantity of determined combination error is equal in conjunction error matching table, the equal each combined error of the quantity of combined error is calculated
The standard deviation of multiple testing sites in matching table, and electric energy meter is installed on one group of minimum transformer of standard deviation, the mark
Quasi- difference calculation formula is as follows：
<mrow>
<mi>S</mi>
<mo>=</mo>
<msqrt>
<mrow>
<mfrac>
<mn>1</mn>
<mi>n</mi>
</mfrac>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>&gamma;</mi>
<mi>i</mi>
</msub>
<mo>-</mo>
<mover>
<mi>&gamma;</mi>
<mo>&OverBar;</mo>
</mover>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
</mrow>
</msqrt>
</mrow>
Wherein, S is the standard deviation after calculating, and n is testing site quantity, γiFor the combined error under different tests point,It is all
The average value of testing site combined error sum.
7. a kind of system that transformer and electric energy meter to plant stand is matched, the system includes：
Combined error matching table determining unit, it is used to calculate every group of voltage transformer summation current transformer one by one according to testing site
Combined error γhWith the elementary error γ of each electric energy meter of stoichiometric pointcAnd γ, formed each electric energy meter of stoichiometric point with it is every
The combined error matching table of group transformer；
Error threshold determining unit, it is used to determine each electric energy meter of stoichiometric point and the combined error matching table of every group of transformer
Error threshold E, screening meets the combined error in each combination matching table of the error threshold scope and determination meets condition
Combined error quantitative value, then the quantitative value of combined error be more than 0 stoichiometric point electric energy meter according to combined error number
The size of value, is arranged with order from big to small；
Stoichiometric point electric energy meter determining unit, it is used to determine that stoichiometric point installs the numbering of electric energy meter according to ranking results, and specifies
With the installation site of the corresponding electric energy meter of numbering.
8. system according to claim 7, it is characterised in that the stoichiometric point includes clearing class stoichiometric point and examination class meter
Amount point.
9. system according to claim 7, it is characterised in that transformer and electric energy meter progress of the system to plant stand
Transformer and examination class meter with being matched including the transformer to plant stand and clearing class stoichiometric point electric energy meter and to plant stand
Point electric energy meter is measured to be matched, and the order matched is transformer and the electric energy meter progress of clearing class stoichiometric point first to plant stand
Match somebody with somebody, then the transformer to plant stand and examination class stoichiometric point electric energy meter are matched.
10. system according to claim 7, it is characterised in that the system also includes transformer combined error and determines list
Member and stoichiometric point Basic Error of Energy Meter determining unit, the transformer combined error determining unit are used to pass through ct calibrating
Error calculation formula asks for the combined error γ of every group of voltage transformer summation current transformerh, calculation formula is：
γh=1/3 (fI1+fV1+fI2+fV2+fI3+fV3)
+0.0097(δI1-δV1+δI2-δV2+δI3-δV3) tan φ (%)
Wherein, fI1、fI2、fI3Poor, the f for the ratio of current transformerV1、fV2、fV3Poor, the δ for the ratio of voltage transformerI1、δI2、δI3For
The angular difference of current transformer, δV1、δV2、δV3For the angular difference of voltage transformer, tan φ are the tangent value of voltage and current and phase difference；
Stoichiometric point Basic Error of Energy Meter determining unit is used to ask for metering according to electric power meter comprehensive error computation formula
The elementary error γ of point electric energy meterc, calculation formula is：
<mrow>
<msub>
<mi>&gamma;</mi>
<mi>c</mi>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>m</mi>
<mn>0</mn>
</msub>
<mo>-</mo>
<mi>m</mi>
</mrow>
<mi>m</mi>
</mfrac>
<mo>&times;</mo>
<mn>100</mn>
<mrow>
<mo>(</mo>
<mi>%</mi>
<mo>)</mo>
</mrow>
</mrow>
Wherein, m is actual measurement umber of pulse, m0For presetting pulse number.
11. system according to claim 7, it is characterised in that error threshold determining unit determines each electric energy of stoichiometric point
The error threshold E of table and the combined error matching table of every group of transformer, screening meets each combination of the error threshold scope
Combined error and determination in matching table meet the quantitative value of the combined error of condition, including：
Calculate the average value of all combined errors in the electric energy meter combined error matching table of transformer and stoichiometric pointAnd standard deviation sigma；
According to Pauta criterion setting error threshold E=3 σ；
Select to meet in combined error matching tableAll combined errors and determine the quantity of combined error.
12. system according to claim 7, it is characterised in that in error threshold determining unit, when one of stoichiometric point
When electric energy meter is equal with the quantity of determined combination error in the combined error matching table of multigroup transformer, combined error is calculated
The standard deviation of multiple testing sites in the equal each combined error matching table of quantity, and electric energy meter is installed on standard deviation minimum
One group of transformer on, the standard deviation calculation formula is as follows：
<mrow>
<mi>S</mi>
<mo>=</mo>
<msqrt>
<mrow>
<mfrac>
<mn>1</mn>
<mi>n</mi>
</mfrac>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>&gamma;</mi>
<mi>i</mi>
</msub>
<mo>-</mo>
<mover>
<mi>&gamma;</mi>
<mo>&OverBar;</mo>
</mover>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
</mrow>
</msqrt>
</mrow>
Wherein, S is the standard deviation after calculating, and n is testing site quantity, γiFor the combined error under different tests point,It is all
The average value of testing site combined error sum.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426669A (en) * | 2019-08-12 | 2019-11-08 | 安徽南瑞中天电力电子有限公司 | A kind of automatic screening methods of electric energy meter based on error testing |
| CN115236394A (en) * | 2022-09-22 | 2022-10-25 | 南方电网数字电网研究院有限公司 | Power transmission line carbon emission metering method and device, computer equipment and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852609A (en) * | 2012-11-28 | 2014-06-11 | 国家电网公司 | Metering box, ground wire hitching method of the metering box, and replacement method of current transformer of the metering box |
| CN104218570A (en) * | 2014-08-21 | 2014-12-17 | 国家电网公司 | Method and system for online evaluating overall measuring errors of electric energy measuring device |
| CN106066860A (en) * | 2016-05-24 | 2016-11-02 | 广东电网有限责任公司 | A kind of method of electric power meter management |
| CN106324547A (en) * | 2016-08-24 | 2017-01-11 | 成都思晗科技股份有限公司 | Operation state prediction method used for metering device |
-
2017
- 2017-04-14 CN CN201710245718.0A patent/CN107085195B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852609A (en) * | 2012-11-28 | 2014-06-11 | 国家电网公司 | Metering box, ground wire hitching method of the metering box, and replacement method of current transformer of the metering box |
| CN104218570A (en) * | 2014-08-21 | 2014-12-17 | 国家电网公司 | Method and system for online evaluating overall measuring errors of electric energy measuring device |
| CN106066860A (en) * | 2016-05-24 | 2016-11-02 | 广东电网有限责任公司 | A kind of method of electric power meter management |
| CN106324547A (en) * | 2016-08-24 | 2017-01-11 | 成都思晗科技股份有限公司 | Operation state prediction method used for metering device |
Non-Patent Citations (1)
| Title |
|---|
| 黄克生: "浅谈计量互感器与电能表的匹配", 《农村电工》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426669A (en) * | 2019-08-12 | 2019-11-08 | 安徽南瑞中天电力电子有限公司 | A kind of automatic screening methods of electric energy meter based on error testing |
| CN115236394A (en) * | 2022-09-22 | 2022-10-25 | 南方电网数字电网研究院有限公司 | Power transmission line carbon emission metering method and device, computer equipment and storage medium |
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