CN110308415A - The error compensating method and device of electric energy metered system - Google Patents
The error compensating method and device of electric energy metered system Download PDFInfo
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- CN110308415A CN110308415A CN201910607649.2A CN201910607649A CN110308415A CN 110308415 A CN110308415 A CN 110308415A CN 201910607649 A CN201910607649 A CN 201910607649A CN 110308415 A CN110308415 A CN 110308415A
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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
Abstract
The error compensating method and device of present invention offer electric energy metered system, comprising: the corresponding ratio difference of each current error test point and angular difference for the current transformer that will acquire obtain first error curve by curve fitting algorithm；When the rated current of actual current and current transformer is there are when the first ratio relation, the corresponding ratio difference of the first ratio and angular difference are obtained according to first error curve, to obtain the composition error of current transformer；The corresponding error of each current error test point of electric energy meter is obtained into the second error curve by Algorithm of fitting a straight line；When the rated current of practical secondary current and the electric energy meter is there are when the second ratio relation, the corresponding electric energy meter error of the second ratio is obtained according to the second error curve；According to error caused by the composition error of current transformer, electric energy meter error and the secondary wiring pressure drop that prestores, the composition error of electric energy metered system is obtained；Practical electricity consumption is compensated, the accuracy of electricity consumption metering is improved.
Description
Technical field
The present invention relates to electric energy meter technical fields, more particularly, to the error compensating method and device of electric energy metered system.
Background technique
When scene electric terminal be it is high-power when, by electric current it is very big, therefore, electric energy meter measurement electric terminal
Electricity when, can be more than the range of electric energy meter, therefore need that the electric current of electric terminal contracts by the proportionality coefficient of current transformer
After small, it could be measured by electric energy meter.
And when electric terminal is Smaller load, by electric current can have error, so as to cause the bigger error of electric energy meter,
Along with the loss etc. in the error and connecting line of current transformer itself, total error can be made very big, so as to cause metering
There are deviations for electricity consumption.
Summary of the invention
In view of this, the purpose of the present invention is to provide the error compensating method of electric energy metered system and device, Ke Yitong
The composition error for crossing electric energy metered system compensates practical electricity consumption, improves the accuracy of electricity consumption metering.
In a first aspect, the embodiment of the invention provides the error compensating methods of electric energy metered system, which comprises
Obtain the corresponding ratio difference of each current error test point and angular difference of current transformer；
By the corresponding ratio difference of each current error test point and angular difference by curve fitting algorithm, the first mistake is obtained
Poor curve；
When the rated current of actual current and the current transformer exists when the first ratio relation, according to first mistake
Poor curve obtains the corresponding ratio difference of first ratio and angular difference；
According to the corresponding ratio difference of first ratio and the angular difference, the composition error of the current transformer is obtained；
Obtain the corresponding error of each current error test point of electric energy meter；
By the corresponding error of each current error test point by Algorithm of fitting a straight line, the second error curve is obtained；
When the rated current of practical secondary current and the electric energy meter exists when the second ratio relation, according to second mistake
Poor curve obtains the corresponding electric energy meter error of second ratio；
According to caused by the composition error of the current transformer, the electric energy meter error and the secondary wiring pressure drop that prestores
Error obtains the composition error of electric energy metered system；
Practical electricity consumption is compensated according to the composition error of the electric energy metered system, obtains compensation electricity.
Further, error caused by the secondary wiring pressure drop obtains in the following manner:
Obtain the secondary wiring pressure drop ratio difference of voltage transformer, the voltage transformer secondary wiring voltage drop error and
Power-factor angle；
According to the secondary wiring pressure drop ratio difference, the secondary wiring voltage drop error and the power-factor angle, obtain
Error caused by the secondary wiring pressure drop.
Further, described according to the secondary wiring pressure drop ratio difference, the secondary wiring voltage drop error and the function
Rate factor angle obtains error caused by the secondary wiring pressure drop, comprising:
Error caused by the secondary wiring pressure drop is calculated according to the following formula:
Wherein, γdFor error caused by the secondary wiring pressure drop, f1、f2And f3For the secondary wiring pressure drop ratio
Difference, δ1、δ2And δ3For the secondary wiring voltage drop error,For the power-factor angle.
Further, described according to the corresponding ratio difference of first ratio and the angular difference, obtain the Current Mutual Inductance
The composition error of device, comprising:
The composition error of the current transformer is calculated according to the following formula:
γh=1/3 (f11+f12+f13+fv1+fv2+fv3)+0.0097(δ11-δv1+δ12-δv2+δ13-δv3) %
Wherein, f11、f12And f13For the corresponding ratio difference of first ratio, δ11、δ12And δ13For first ratio pair
The angular difference answered, fv1、fv2And fv3For the ratio difference of voltage transformer, δv1、δv2And δv3For the angular difference of the voltage transformer, γh
For the composition error of the current transformer.
Further, described according to the composition error of the current transformer, the electric energy meter error and secondary wiring pressure
Error caused by dropping, obtains the composition error of electric energy metered system, comprising:
The composition error of the electric energy metered system is calculated according to the following formula:
γ=(1+ γh)*(1+γd)*(1+γe)-1
Wherein, γ is the composition error of the electric energy metered system, γhFor the composition error of the current transformer, γd
For error caused by the secondary wiring pressure drop, γeFor the electric energy meter error.
Further, the composition error according to the electric energy metered system compensates practical electricity consumption, obtains
Compensate electricity, comprising:
The compensation electricity is calculated according to the following formula:
W=W '/(1+ γ)
Wherein, W is the compensation electricity, and W ' is practical electricity consumption, and γ is the composition error of the electric energy metered system.
Second aspect, the embodiment of the invention provides the error-compensating apparatus of electric energy metered system, described device includes:
First acquisition unit, for obtaining the corresponding ratio difference of each current error test point and the angle of current transformer
Difference；
First error curve acquisition unit, for leading to the corresponding ratio difference of each current error test point and angular difference
Curve fitting algorithm is crossed, first error curve is obtained；
Second acquisition unit, there are the first ratio relations for the rated current for working as actual current and the current transformer
When, the corresponding ratio difference of first ratio and angular difference are obtained according to the first error curve；
Current transformer composition error acquiring unit, for according to the corresponding ratio difference of first ratio and the angle
Difference obtains the composition error of the current transformer；
Current error tests point tolerance acquiring unit, for obtaining the corresponding mistake of each current error test point of electric energy meter
Difference；
Second error curve acquiring unit, for intending the corresponding error of each current error test point by straight line
Hop algorithm obtains the second error curve；
Electric energy meter error acquiring unit, for the rated current when practical secondary current and the electric energy meter, there are the second ratios
When value relationship, the corresponding electric energy meter error of second ratio is obtained according to second error curve；
Composition error acquiring unit, for according to the composition error of the current transformer, the electric energy meter error and pre-
Error caused by the secondary wiring pressure drop deposited, obtains the composition error of electric energy metered system；
Compensating unit is obtained for being compensated according to the composition error of the electric energy metered system to practical electricity consumption
Compensate electricity.
Further, the current transformer composition error acquiring unit is specifically used for:
The composition error of the current transformer is calculated according to the following formula:
γh=1/3 (f11+f12+f13+fv1+fv2+fv3)+0.0097(δ11-δv1+δ12-δv2+δ13-δv3) %
Wherein, f11、f12And f13For the corresponding ratio difference of first ratio, δ11、δ12And δ13For first ratio pair
The angular difference answered, fv1、fv2And fv3For the ratio difference of voltage transformer, δv1、δv2And δv3For the angular difference of the voltage transformer, γh
For the composition error of the current transformer.
The third aspect is deposited on the memory the embodiment of the invention provides electronic equipment, including memory, processor
The computer program that can be run on the processor is contained, the processor realizes institute as above when executing the computer program
The step of method stated.
Fourth aspect, the embodiment of the invention provides the computers for the non-volatile program code that can be performed with processor
Readable medium, said program code make the processor execute method as described above.
The embodiment of the invention provides the error compensating method of electric energy metered system and devices, comprising: obtains Current Mutual Inductance
The corresponding ratio difference of each current error test point and angular difference of device；By the corresponding ratio difference of each current error test point and angle
Difference obtains first error curve by curve fitting algorithm；When there are first for the rated current of actual current and current transformer
When ratio relation, the corresponding ratio difference of the first ratio and angular difference are obtained according to first error curve；It is corresponding according to the first ratio
Ratio difference and angular difference obtain the composition error of current transformer；Obtain the corresponding mistake of each current error test point of electric energy meter
Difference；By the corresponding error of each current error test point by Algorithm of fitting a straight line, the second error curve is obtained；When practical secondary
It is corresponding to obtain the second ratio according to the second error curve there are when the second ratio relation for the rated current of electric current and the electric energy meter
Electric energy meter error；According to caused by the composition error of current transformer, electric energy meter error and the secondary wiring pressure drop that prestores accidentally
Difference obtains the composition error of electric energy metered system；Practical electricity consumption is compensated according to the composition error of electric energy metered system,
Compensation electricity is obtained, the accuracy of electricity consumption metering is improved.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention are in specification, claims
And specifically noted structure is achieved and obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the error compensating method flow chart for the electric energy metered system that the embodiment of the present invention one provides；
Fig. 2 is the error-compensating apparatus schematic diagram of electric energy metered system provided by Embodiment 2 of the present invention.
Icon:
10- first acquisition unit；20- first error curve acquisition unit；30- second acquisition unit；40- current transformer
Composition error acquiring unit；50- current error tests point tolerance acquiring unit；60- the second error curve acquiring unit；70- electricity
It can Watch Error acquiring unit；80- composition error acquiring unit；90- compensating unit.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
To be described in detail to the embodiment of the present invention below convenient for understanding the present embodiment.
Embodiment one:
Fig. 1 is the error compensating method flow chart for the electric energy metered system that the embodiment of the present invention one provides.
Referring to Fig.1, electric energy metered system is master system, and each electricity of current transformer is acquired by master system
The corresponding ratio difference of stream error test point and angular difference, and the corresponding error of each current error test point of acquisition electric energy meter,
It is handled, obtains the composition error of electric energy metered system；And practical electricity consumption is compensated, specifically, this method includes
Following steps:
Step S1 obtains the corresponding ratio difference of each current error test point and angular difference of current transformer；
Step S2 obtains the by the corresponding ratio difference of each current error test point and angular difference by curve fitting algorithm
One error curve；
Specifically, when actual current is respectively 1%, 5%, 20%, 100% and the 120% of rated current, by 1%,
5%, 20%, the 100% and 120% current error test point as current transformer.It is corresponding to obtain current error test point
Ratio difference and angular difference are fitted using the corresponding ratio difference of current error test point and angular difference as the input of curve fitting algorithm
To first error curve.Wherein, actual current is the electric current for flowing through the primary side of current transformer.
Step S3 is missed according to first when the rated current of actual current and current transformer is there are when the first ratio relation
Poor curve obtains the corresponding ratio difference of the first ratio and angular difference；
Step S4 obtains the composition error of current transformer according to the corresponding ratio difference of the first ratio and angular difference；
Specifically, when the rated current of actual current and current transformer is there are the first ratio relation, i.e. actual current is
When the a% of the rated current of current transformer, pass through the corresponding ratio difference f of available first ratio of first error curve11、
f12And f13And the first corresponding angular difference δ of ratio11、δ12And δ13。
Step S5 obtains the corresponding error of each current error test point of electric energy meter；
Step S6 obtains the second error song by the corresponding error of each current error test point by Algorithm of fitting a straight line
Line；
Specifically, by 20Ib、10Ib, 100%Ib, 50%Ib, 10%IbAnd 5%IbAs current error test point, obtain
The corresponding error of each current error test point, using the corresponding error of each current error test point as Algorithm of fitting a straight line
Input, fitting obtain the second error curve.First error curve and the corresponding data of the second error curve can be exported directly, side
Just user carries out the operation such as data misarrangement and data analysis.
Step S7 is missed according to second when the rated current of practical secondary current and electric energy meter is there are when the second ratio relation
Poor curve obtains the corresponding electric energy meter error of the second ratio；
Here, when there are the second ratio relation, i.e., practical secondary currents for the rated current of practical secondary current and electric energy meter
For the rated current of electric energy meter b% when, the corresponding electric energy meter error of the second ratio is obtained by the second error curve, wherein
Practical secondary current is the electric current for flowing through the secondary side of current transformer.
Step S8, according to caused by the composition error of current transformer, electric energy meter error and the secondary wiring pressure drop that prestores
Error obtains the composition error of electric energy metered system；
Step S9 compensates practical electricity consumption according to the composition error of electric energy metered system, obtains compensation electricity.
Here, when being Smaller load due to electric terminal, electric energy meter there are the error of error and current transformer itself and
Loss on connecting line, leading to the electricity consumption measured, there are deviations, therefore, according to the composition error of current transformer, electric energy meter
Error caused by error and secondary wiring pressure drop, obtains the composition error of electric energy metered system, according to the comprehensive of electric energy metered system
It closes error to compensate practical electricity consumption, to obtain the electricity for finally needing to remedy, that is, compensates electricity.
Further, error caused by secondary wiring pressure drop obtains in the following manner, comprising the following steps:
The secondary wiring pressure drop of step S11, the secondary wiring pressure drop ratio difference, voltage transformer that obtain voltage transformer miss
Difference and power-factor angle；
Step S12 is obtained secondary according to secondary wiring pressure drop ratio difference, secondary wiring voltage drop error and power-factor angle
Error caused by conducting wire pressure drop.
Further, step S12 includes:
Error caused by calculating secondary wiring pressure drop according to formula (1):
Wherein, γdFor error caused by secondary wiring pressure drop, f1、f2And f3For secondary wiring pressure drop ratio difference, δ1、δ2With
δ3For secondary wiring voltage drop error,For power-factor angle.
Further, step S4 includes:
According to the composition error of formula (2) calculating current mutual inductor:
Wherein, f11、f12And f13For the corresponding ratio difference of the first ratio, δ11、δ12And δ13For the corresponding angular difference of the first ratio,
fv1、fv2And fv3For the ratio difference of voltage transformer, δv1、δv2And δv3For the angular difference of voltage transformer, γhFor current transformer
Composition error.
Further, step S8 includes:
The composition error of electric energy metered system is calculated according to formula (3):
γ=(1+ γh)*(1+γd)*(1+γe)-1 (3)
Wherein, γ is the composition error of electric energy metered system, γhFor the composition error of current transformer, γdIt is led to be secondary
Error caused by line pressure drop, γeFor electric energy meter error.
Further, step S9 includes:
Compensation electricity is calculated according to formula (4):
W=W '/(1+ γ) (4)
Wherein, W is compensation electricity, and W ' is practical electricity consumption, and γ is the composition error of electric energy metered system.
The embodiment of the invention provides the error compensating methods of electric energy metered system, comprising: obtains the every of current transformer
The corresponding ratio difference of a current error test point and angular difference；The corresponding ratio difference of each current error test point and angular difference are passed through
Curve fitting algorithm obtains first error curve；When there are the first ratios to close for the rated current of actual current and current transformer
When being, the corresponding ratio difference of the first ratio and angular difference are obtained according to first error curve；According to the corresponding ratio difference of the first ratio
And angular difference, obtain the composition error of current transformer；Obtain the corresponding error of each current error test point of electric energy meter；It will be every
The corresponding error of a current error test point obtains the second error curve by Algorithm of fitting a straight line；When practical secondary current with
The rated current of the electric energy meter obtains the corresponding electric energy of the second ratio according to the second error curve there are when the second ratio relation
Watch Error；According to error caused by the composition error of current transformer, electric energy meter error and the secondary wiring pressure drop that prestores, obtain
The composition error of electric energy metered system；Practical electricity consumption is compensated according to the composition error of electric energy metered system, is mended
Electricity is repaid, the accuracy of electricity consumption metering is improved.
Embodiment two:
Fig. 2 is the error-compensating apparatus schematic diagram of electric energy metered system provided by Embodiment 2 of the present invention.
Referring to Fig. 2, which includes:
First acquisition unit 10, for obtaining the corresponding ratio difference of each current error test point and the angle of current transformer
Difference；
First error curve acquisition unit 20, for passing through the corresponding ratio difference of each current error test point and angular difference
Curve fitting algorithm obtains first error curve；
Second acquisition unit 30, there are the first ratio relations for the rated current for working as actual current and current transformer
When, the corresponding ratio difference of the first ratio and angular difference are obtained according to first error curve；
Current transformer composition error acquiring unit 40, for obtaining according to the corresponding ratio difference of the first ratio and angular difference
The composition error of current transformer；
Current error tests point tolerance acquiring unit 50, and each current error test point for obtaining electric energy meter is corresponding
Error；
Second error curve acquiring unit 60, for the corresponding error of each current error test point to be passed through straight line fitting
Algorithm obtains the second error curve；
Electric energy meter error acquiring unit 70, there are the second ratios for the rated current for working as practical secondary current and electric energy meter
When relationship, the corresponding electric energy meter error of the second ratio is obtained according to the second error curve；
Composition error acquiring unit 80, for according to the composition error of current transformer, electric energy meter error and prestore two
Error caused by secondary conducting wire pressure drop, obtains the composition error of electric energy metered system；
Compensating unit 90 is mended for being compensated according to the composition error of electric energy metered system to practical electricity consumption
Repay electricity.
Further, current transformer composition error acquiring unit 40 is specifically used for:
According to the composition error of formula (2) calculating current mutual inductor:
γh=1/3 (f11+f12+f13+fv1+fv2+fv3)+0.0097(δ11-δv1+δ12-δv2+δ13-δv3) %
Wherein, f11、f12And f13For the corresponding ratio difference of the first ratio, δ11、δ12And δ13For the corresponding angular difference of the first ratio,
fv1、fv2And fv3For the ratio difference of voltage transformer, δv1、δv2And δv3For the angular difference of voltage transformer, γhFor current transformer
Composition error.
The embodiment of the invention provides the error-compensating apparatus of electric energy metered system, comprising: obtains the every of current transformer
The corresponding ratio difference of a current error test point and angular difference；The corresponding ratio difference of each current error test point and angular difference are passed through
Curve fitting algorithm obtains first error curve；When there are the first ratios to close for the rated current of actual current and current transformer
When being, the corresponding ratio difference of the first ratio and angular difference are obtained according to first error curve；According to the corresponding ratio difference of the first ratio
And angular difference, obtain the composition error of current transformer；Obtain the corresponding error of each current error test point of electric energy meter；It will be every
The corresponding error of a current error test point obtains the second error curve by Algorithm of fitting a straight line；When practical secondary current with
The rated current of the electric energy meter obtains the corresponding electric energy of the second ratio according to the second error curve there are when the second ratio relation
Watch Error；According to error caused by the composition error of current transformer, electric energy meter error and the secondary wiring pressure drop that prestores, obtain
The composition error of electric energy metered system；Practical electricity consumption is compensated according to the composition error of electric energy metered system, is mended
Electricity is repaid, the accuracy of electricity consumption metering is improved.
The embodiment of the present invention also provides a kind of electronic equipment, including memory, processor and storage are on a memory and can
The computer program run on a processor, processor realize electrical energy measurement provided by the above embodiment when executing computer program
The step of error compensating method of system.
The embodiment of the present invention also provides a kind of computer readable storage medium, and meter is stored on computer readable storage medium
Calculation machine program, executes the error compensating method of the electric energy metered system of above-described embodiment when computer program is run by processor
Step.
Computer program product provided by the embodiment of the present invention, the computer-readable storage including storing program code
Medium, the instruction that said program code includes can be used for executing previous methods method as described in the examples, and specific implementation can be joined
See embodiment of the method, details are not described herein.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
It with the specific work process of device, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of error compensating method of electric energy metered system, which is characterized in that the described method includes:
Obtain the corresponding ratio difference of each current error test point and angular difference of current transformer；
By the corresponding ratio difference of each current error test point and angular difference by curve fitting algorithm, first error song is obtained
Line；
When the rated current of actual current and the current transformer exists when the first ratio relation, according to the first error song
Line obtains the corresponding ratio difference of first ratio and angular difference；
According to the corresponding ratio difference of first ratio and the angular difference, the composition error of the current transformer is obtained；
Obtain the corresponding error of each current error test point of electric energy meter；
By the corresponding error of each current error test point by Algorithm of fitting a straight line, the second error curve is obtained；
When the rated current of practical secondary current and the electric energy meter exists when the second ratio relation, according to the second error song
Line obtains the corresponding electric energy meter error of second ratio；
According to caused by the composition error of the current transformer, the electric energy meter error and the secondary wiring pressure drop that prestores accidentally
Difference obtains the composition error of electric energy metered system；
Practical electricity consumption is compensated according to the composition error of the electric energy metered system, obtains compensation electricity.
2. the error compensating method of electric energy metered system according to claim 1, which is characterized in that the secondary wiring pressure
Error caused by dropping obtains in the following manner:
Obtain the secondary wiring pressure drop ratio difference of voltage transformer, the secondary wiring voltage drop error and power of the voltage transformer
Factor angle；
According to the secondary wiring pressure drop ratio difference, the secondary wiring voltage drop error and the power-factor angle, obtain described
Error caused by secondary wiring pressure drop.
3. the error compensating method of electric energy metered system according to claim 2, which is characterized in that described according to described two
Secondary conducting wire pressure drop ratio difference, the secondary wiring voltage drop error and the power-factor angle obtain the secondary wiring pressure drop and draw
The error risen, comprising:
Error caused by the secondary wiring pressure drop is calculated according to the following formula:
Wherein, γdFor error caused by the secondary wiring pressure drop, f1、f2And f3For the secondary wiring pressure drop ratio difference, δ1、
δ2And δ3For the secondary wiring voltage drop error,For the power-factor angle.
4. the error compensating method of electric energy metered system according to claim 1, which is characterized in that described according to described
The corresponding ratio difference of one ratio and the angular difference, obtain the composition error of the current transformer, comprising:
The composition error of the current transformer is calculated according to the following formula:
γh=1/3 (f11+f12+f13+fv1+fv2+fv3)+0.0097(δ11-δv1+δ12-δv2+δ13-δv3) %
Wherein, f11、f12And f13For the corresponding ratio difference of first ratio, δ11、δ12And δ13It is corresponding for first ratio
Angular difference, fv1、fv2And fv3For the ratio difference of voltage transformer, δv1、δv2And δv3For the angular difference of the voltage transformer, γhFor institute
State the composition error of current transformer.
5. the error compensating method of electric energy metered system according to claim 1, which is characterized in that described according to the electricity
Error caused by the composition error of current transformer, the electric energy meter error and secondary wiring pressure drop, obtains electric energy metered system
Composition error, comprising:
The composition error of the electric energy metered system is calculated according to the following formula:
γ=(1+ γh)*(1+γd)*(1+γe)-1
Wherein, γ is the composition error of the electric energy metered system, γhFor the composition error of the current transformer, γdFor institute
State error caused by secondary wiring pressure drop, γeFor the electric energy meter error.
6. the error compensating method of electric energy metered system according to claim 1, which is characterized in that described according to the electricity
The composition error of energy metering system compensates practical electricity consumption, obtains compensation electricity, comprising:
The compensation electricity is calculated according to the following formula:
W=W '/(1+ γ)
Wherein, W is the compensation electricity, and W ' is practical electricity consumption, and γ is the composition error of the electric energy metered system.
7. a kind of error-compensating apparatus of electric energy metered system, which is characterized in that described device includes:
First acquisition unit, for obtaining the corresponding ratio difference of each current error test point and angular difference of current transformer；
First error curve acquisition unit, for the corresponding ratio difference of each current error test point and angular difference to be passed through song
Line fitting algorithm obtains first error curve；
Second acquisition unit, for when the rated current of actual current and the current transformer is there are when the first ratio relation,
The corresponding ratio difference of first ratio and angular difference are obtained according to the first error curve；
Current transformer composition error acquiring unit, for obtaining according to the corresponding ratio difference of first ratio and the angular difference
To the composition error of the current transformer；
Current error tests point tolerance acquiring unit, for obtaining the corresponding error of each current error test point of electric energy meter；
Second error curve acquiring unit, for the corresponding error of each current error test point to be passed through straight line fitting calculation
Method obtains the second error curve；
Electric energy meter error acquiring unit, there are the second ratios to close for the rated current for working as practical secondary current and the electric energy meter
When being, the corresponding electric energy meter error of second ratio is obtained according to second error curve；
Composition error acquiring unit, for according to the composition error of the current transformer, the electric energy meter error and prestoring
Error caused by secondary wiring pressure drop obtains the composition error of electric energy metered system；
Compensating unit is compensated for being compensated according to the composition error of the electric energy metered system to practical electricity consumption
Electricity.
8. the error-compensating apparatus of electric energy metered system according to claim 7, which is characterized in that the current transformer
Composition error acquiring unit is specifically used for:
The composition error of the current transformer is calculated according to the following formula:
γh=1/3 (f11+f12+f13+fv1+fv2+fv3)+0.0097(δ11-δv1+δ12-δv2+δ13-δv3) %
Wherein, f11、f12And f13For the corresponding ratio difference of first ratio, δ11、δ12And δ13It is corresponding for first ratio
Angular difference, fv1、fv2And fv3For the ratio difference of voltage transformer, δv1、δv2And δv3For the angular difference of the voltage transformer, γhFor institute
State the composition error of current transformer.
9. a kind of electronic equipment, including memory, processor, be stored on the memory to run on the processor
Computer program, which is characterized in that the processor realizes that the claims 1 to 6 are any when executing the computer program
The step of method described in item.
10. a kind of computer-readable medium for the non-volatile program code that can be performed with processor, which is characterized in that described
Program code makes the processor execute the method as claimed in any one of claims 1 to 6.
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