CN104133189A - Method and device for detecting electric quantity return and supplement error at voltage loss of one phase of three-phase four-wire electric energy meter - Google Patents
Method and device for detecting electric quantity return and supplement error at voltage loss of one phase of three-phase four-wire electric energy meter Download PDFInfo
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- CN104133189A CN104133189A CN201410337422.8A CN201410337422A CN104133189A CN 104133189 A CN104133189 A CN 104133189A CN 201410337422 A CN201410337422 A CN 201410337422A CN 104133189 A CN104133189 A CN 104133189A
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Abstract
Provided are a method and a device for detecting electric quantity return and supplement error at voltage loss of one phase of a three-phase four-wire electric energy meter. The method comprises the following steps: an error detection model of correction power at voltage loss of one phase of a three-phase four-wire electric energy meter is established; the positive sequence components, the negative sequence components and the zero sequence components of voltages of three phases and the positive sequence components, the negative sequence components and the zero sequence components of currents of three phases of a grid in a set period of time before the current voltage loss are acquired, and the degrees of unbalance and the phase differences are determined; and the error range of correction power is determined according to the degrees of unbalance, the phase differences and the error detection model, and the error range of electric quantity return and supplement is determined according to the error range of correction power. Whether current returned and supplemented electric quantity can be utilized to carry out electric quantity return and supplement for the voltage loss can be determined according to the error range of electric quantity return and supplement. The reliability of return and supplement at voltage loss of one phase of the three-phase four-wire electric energy meter is improved, and the accuracy of electric quantity return and supplement detection is improved.
Description
Technical field
The present invention relates to electric system electric energy metrical field, while particularly relating to a kind of three-phase and four-line electric energy meter one phase decompression, move back electric weight error detection method and the system of mending.
Background technology
Electric energy meter kind is a lot of at present, and electric energy meter is among a development process with rapid changepl. never-ending changes and improvements.Electric energy meter decompression causes institute's quantity calculation not conform to actual electric weight, needs to determine to move back benefit electric weight.
Electric energy meter decompression time institute quantity calculation, the electric weight of actual metered while being electrical energy meter fault, also claim fault electric weight, when no-voltage fault, fault electric weight most applications is fewer than actual power consumption, special circumstances also likely can be many, can not correctly measure in a word actual power consumption, most applications is to differ greatly, and need to move back to mend than actual power consumption is few and count or the electric weight of many meters.Need to know actual power consumption, actual electric weight, also referred to as correct electric weight, can not directly be learnt when decompression, can obtain approaching with " voltage method of substitution " readjustment electric quantity of correct electric weight for this reason.Readjustment electric quantity subtracts fault electric weight, on the occasion of, represent that electric energy meter counted electric weight, the electric weight that should hand in retroactively for user less; For negative value, expression electric energy meter has been counted electric weight more, and for returning user's electric weight, the two is referred to as moves back benefit electric weight, can be formulated: move back benefit electric weight=readjustment electric quantity-fault electric weight.
" the voltage method of substitution " using at present moves back benefit electric weight method while determining three-phase and four-line one phase decompression is to substitute decompression phase voltage amplitude by non-decompression phase voltage amplitude, calculate the corrigendum electric current and voltage phase differential of decompression phase with normal phase voltage and the phasometer of corresponding electric current, replace decompression phase voltage current and phase difference with this phase differential, thereby calculate corrigendum active power, then obtain readjustment electric quantity.The method has overcome the shortcoming that need to suppose three-phase load current balance type, but not necessarily desirable equilibrium state of actual electrical network three-phase voltage.In the time of imbalance of three-phase voltage, according to " voltage method of substitution " principle, it moves back benefit electric weight and has error.
Do not know at present the concrete scope of benefit electric weight error with the variation of imbalance of three-phase voltage degree of moving back that " voltage method of substitution " calculates.Such as, when three-phase voltage negative phase-sequence degree of unbalancedness is 1%, moving back and mending electric weight error is 1% or 10%, thereby whether accurately moving back of can producing that the method obtains mend electric weight query in actual applications, affect the method in the practical application of moving back in benefit electric weight.For this reason, while also needing a kind of technical scheme estimation three-phase and four-line electric energy meter one phase decompression, the concrete scope of the error of readjustment electric quantity in the time of imbalance of three-phase voltage, guarantees to move back and mends electric weight error in known scope, makes " voltage method of substitution " precise and reliable more.
Summary of the invention
Based on this, be necessary for the problems referred to above, provide a kind of can determine while moving back the three-phase and four-line electric energy meter one phase decompression of mending electric weight error range, move back electric weight error detection method and the system of mending.
When a kind of three-phase and four-line electric energy meter one phase decompression, move back and mend electric weight error detection method, comprising:
The error-detecting model of positive more while setting up three-phase and four-line electric energy meter one phase decompression:
Wherein, γ represents the more error range of positive, ε
v2represent voltage negative phase-sequence degree of unbalancedness, ε
v0represent voltage zero sequence degree of unbalancedness, ε
i2represent electric current negative phase-sequence degree of unbalancedness, ε
i0represent current zero sequence degree of unbalancedness,
represent the phase differential of residual voltage and zero-sequence current,
represent the phase differential of residual voltage and forward-order current,
represent the phase differential of residual voltage and negative-sequence current,
represent the phase differential of positive sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and zero-sequence current,
represent the phase differential of negative sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and negative-sequence current;
Obtain positive-sequence component, negative sequence component and zero-sequence component when positive-sequence component, negative sequence component, zero-sequence component and the three-phase current of electrical network three-phase voltage in setting-up time section before time decompression;
Determine ε according to the positive-sequence component of the positive-sequence component of described three-phase voltage, negative sequence component, zero-sequence component and three-phase current, negative sequence component and zero-sequence component
v2, ε
v0, ε
i2, ε
i0,
According to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described error-detecting model, determine to move back according to corrigendum power error scope and mend electric weight error range.
When a kind of three-phase and four-line electric energy meter one phase decompression, move back and mend electric weight error detecting system, comprising:
Model building module, the error-detecting model of positive more when setting up three-phase and four-line electric energy meter one phase decompression:
Wherein, γ represents the more error range of positive, ε
v2represent voltage negative phase-sequence degree of unbalancedness, ε
v0represent voltage zero sequence degree of unbalancedness, ε
i2represent electric current negative phase-sequence degree of unbalancedness, ε
i0represent current zero sequence degree of unbalancedness,
represent the phase differential of residual voltage and zero-sequence current,
represent the phase differential of residual voltage and forward-order current,
represent the phase differential of residual voltage and negative-sequence current,
represent the phase differential of positive sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and zero-sequence current,
represent the phase differential of negative sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and negative-sequence current;
Data acquisition module, for obtaining positive-sequence component, negative sequence component and the zero-sequence component when positive-sequence component, negative sequence component, zero-sequence component and the three-phase current of electrical network three-phase voltage in setting-up time section before time decompression;
Parameter determination module, for determining ε according to the positive-sequence component of the positive-sequence component of described three-phase voltage, negative sequence component, zero-sequence component and three-phase current, negative sequence component and zero-sequence component
v2, ε
v0, ε
i2, ε
i0,
Error range detection module, for according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described error-detecting model, determine to move back according to corrigendum power error scope and mend electric weight error range.
When above-mentioned three-phase and four-line electric energy meter one phase decompression, move back electric weight error detection method and the system of mending, by obtaining before current current decompression positive-sequence component, negative sequence component and the zero-sequence component of positive-sequence component, negative sequence component, zero-sequence component and the three-phase current of electrical network three-phase voltage in setting-up time section, then according to these values of obtaining and the error-detecting model of foundation, error is detected, obtain the more error range of positive, mend electric weight error range thereby can obtain to move back.Can judge whether in default error range according to the error range of moving back benefit electric weight, thereby can determine whether to utilize the current benefit of moving back of mending electric weight this decompression carried out electric weight of moving back, while having improved three-phase and four-line electric energy meter one phase decompression, move back the reliability of benefit, and improved to move back and mended electric weight detection accuracy.
Brief description of the drawings
Fig. 1 moves back the schematic flow sheet of mending electric weight error detection method embodiment while being three-phase and four-line electric energy meter one phase decompression of the present invention;
Fig. 2 is the schematic flow sheet of setting up error-detecting model in the embodiment of the present invention;
Fig. 3 is electric current and voltage phasor schematic diagram when three-phase and four-line electric energy meter A phase decompression in the embodiment of the present invention;
Fig. 4 moves back the structural representation of mending electric weight error detecting system embodiment while being three-phase and four-line electric energy meter one phase decompression of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
As shown in Figure 1, during for three-phase and four-line electric energy meter one phase decompression of the present invention, move back the schematic flow sheet of mending electric weight error detection method embodiment, comprise step:
Step S101: the error-detecting model of positive more while setting up three-phase and four-line electric energy meter one phase decompression:
Wherein, γ represents the more error range of positive, ε
v2represent voltage negative phase-sequence degree of unbalancedness, ε
v0represent voltage zero sequence degree of unbalancedness, ε
i2represent electric current negative phase-sequence degree of unbalancedness, ε
i0represent current zero sequence degree of unbalancedness,
represent the phase differential of residual voltage and zero-sequence current,
represent the phase differential of residual voltage and forward-order current,
represent the phase differential of residual voltage and negative-sequence current,
represent the phase differential of positive sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and zero-sequence current,
represent the phase differential of negative sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and negative-sequence current;
Step S102: obtain positive-sequence component, negative sequence component and zero-sequence component when positive-sequence component, negative sequence component, zero-sequence component and the three-phase current of electrical network three-phase voltage in setting-up time section before time decompression;
In the time that three-phase and four-line electric energy meter moves, can monitor and record electrical network three-phase voltage positive-sequence component, voltage negative sequence component, voltage zero-sequence component, electric current positive-sequence component, electric current negative sequence component, current zero sequence component etc. every setting-up time (such as 15 minutes).When decompression detected, obtain positive-sequence component, negative sequence component and the zero-sequence component of positive-sequence component, negative sequence component, zero-sequence component and the three-phase current of electrical network three-phase voltage in the front setting-up time section of current decompression.Setting-up time section is the time period of a current decompression time of vicinity.Such as, setting-up time section can be nearest one month, obtains the data of previous month interior record of current decompression.
Step S103: determine degree of unbalancedness ε according to the positive-sequence component of the positive-sequence component of described three-phase voltage, negative sequence component, zero-sequence component and three-phase current, negative sequence component and zero-sequence component
v2, ε
v0, ε
i2, ε
i0with each phase differential
According to three-phase voltage positive-sequence component, voltage negative sequence component, voltage zero-sequence component, electric current positive-sequence component, electric current negative sequence component, current zero sequence component can be determined voltage negative phase-sequence degree of unbalancedness, voltage zero sequence degree of unbalancedness, electric current negative phase-sequence degree of unbalancedness, current zero sequence degree of unbalancedness, the phase differential of residual voltage and zero-sequence current, the phase differential of residual voltage and forward-order current, the phase differential of residual voltage and negative-sequence current, the phase differential of positive sequence voltage and forward-order current, the phase differential of negative sequence voltage and zero-sequence current, the phase differential of negative sequence voltage and forward-order current, the phase differential of negative sequence voltage and negative-sequence current.
Step S104: according to described degree of unbalancedness ε
v2, ε
v0, ε
i2, ε
i0and phase differential
determine corrigendum power error scope with described error-detecting model, determine to move back according to corrigendum power error scope and mend electric weight error range.
In a kind of embodiment, because the historical data of the same type gathering in setting-up time section is likely different, directly calculating can obtain multiple corrigendum power error scopes therein.Error range is carried out to ascending order arrangement by maximal value, can choose maximum error scope as corrigendum power error scope.
In another embodiment, also error range can be carried out to ascending order arrangement by maximal value, error range number and preset ratio are multiplied each other, obtain numerical value t, t bit error scope in ranking results is made as to corrigendum error range.The object of the present embodiment is the error range producing in order to delete abnormal data (the undesired data that special circumstances produce), is therefore provided with preset ratio.Preset ratio can be determined according to concrete abnormal data amount check.Such as, can be made as 95%.In 100 error ranges, select the error range of the 95th of rank.
In addition, the also first historical data advance Screening Treatment to collection, and then correct power error range computation.
Because equaling more positive, readjustment electric quantity is multiplied by the time, thus can obtain the error range of readjustment electric quantity according to corrigendum power error scope, and then obtain the error range of moving back benefit electric weight.Wherein, more positive can be to determine according to " voltage method of substitution ".
This programme is by obtaining before current current decompression positive-sequence component, negative sequence component and the zero-sequence component of positive-sequence component, negative sequence component, zero-sequence component and the three-phase current of electrical network three-phase voltage in setting-up time section, then according to the error-detecting model of these values of obtaining and foundation, corrigendum power error scope is detected, obtain the more error range of positive, mend electric weight error range thereby can obtain to move back.Can judge whether in default error range according to the error range of moving back benefit electric weight, thereby can determine whether to utilize the current benefit of moving back of mending electric weight this decompression carried out electric weight of moving back, while having improved three-phase and four-line electric energy meter one phase decompression, move back the reliability of benefit, and improved to move back and mended electric weight detection accuracy.
Therein in an embodiment, the described error-detecting model step of positive more while setting up three-phase and four-line electric energy meter one phase decompression, as shown in Figure 2, for setting up the schematic flow sheet of error-detecting model in the embodiment of the present invention, comprising:
Step S201: obtain correct complex power model according to the correct active power model representing with each phase voltage electric current;
Obtain correct complex power model according to the correct active power model of the three-phase and four-line representing with each phase voltage electric current.
Step S202: obtain corrigendum complex power model according to corrigendum active power model;
Wherein, corrigendum active power model can be determined by " voltage method of substitution ".Corrigendum active power model when the corrigendum active power is here three-phase and four-line electric energy meter one phase decompression.
Step S203: ask difference to obtain complex power differential mode type on corrigendum complex power model and correct complex power model;
Step S204: complex power differential mode type is got to real part and obtain active power differential mode type;
Step S205: described correct active power model, positive sequence voltage and the forward-order current representing by phase sequence carried out to product, obtain product model;
Step S206: obtain error-detecting model according to the ratio of described active power differential mode type and described product model.
Such as, taking in three-phase and four-line when A phase decompression as example describes.
The three-phase and four-line representing by phase sequence measures correct active power model:
The correct active power model representing with each phase voltage, electric current:
Can obtain correct complex power model:
As shown in Figure 3, be electric current and voltage phasor schematic diagram when three-phase and four-line electric energy meter A phase decompression in the embodiment of the present invention.ψ in figure
aBbe
with
phase differential, by described voltage method of substitution, as substituted mutually with B, that is: replace A phase voltage amplitude, 120 °-ψ by B phase voltage amplitude
aBreplace
its corrigendum active power model is:
Obtain corrigendum complex power model according to corrigendum active power model:
And then can obtain complex power differential mode type:
Get
real part must be corrected active power and correct wattful power rate variance, i.e. active power differential mode type:
represent the phase differential of residual voltage and zero-sequence current,
represent the phase differential of residual voltage and forward-order current,
represent the phase differential of residual voltage and negative-sequence current,
represent the phase differential of positive sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and zero-sequence current,
represent the phase differential of negative sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and negative-sequence current.
Thereby can obtain error-detecting model:
?
Wherein, γ represents the more error range of positive, ε
v2represent voltage negative phase-sequence degree of unbalancedness, ε
v0represent voltage zero sequence degree of unbalancedness, ε
i2represent electric current negative phase-sequence degree of unbalancedness, ε
i0represent current zero sequence degree of unbalancedness.
In like manner can determine three-phase and four-line electric energy meter A phase decompression time by the error range of the alternative readjustment electric quantity of C phase voltage, and the error range of readjustment electric quantity when B phase, C phase decompression.
Therein in an embodiment, due to ε in actual electric network
v2ε
i2and ε
v0ε
i0long-pending much smaller than 1,
generally more than 0.8, in denominator, relevant binomial can be ignored with it.That is:
Acquisition also comprises error-detecting model is optimized before moving back and mending electric weight error range, obtains first and optimizes error-detecting model,
Described according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine that with described error-detecting model corrigendum power error scope step comprises: according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described the first optimization error-detecting model.
By above-mentioned optimization method, can reduce calculated amount, improve the efficiency that detects error range.
Further, each sine function simultaneously value is 1 or-1, before acquisition is moved back and mended electric weight error range, also comprises error-detecting model is optimized, obtain second and optimize error-detecting model,
Described according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine that with described error-detecting model corrigendum power error scope step comprises: according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described the second optimization error-detecting model.
By above-mentioned optimization method, can further reduce calculated amount, improve the efficiency that detects error range.
Further, because the three-phase activity coefficient of actual electric network approximates positive-sequence power factor, before therefore acquisition is moved back and mended electric weight error range, also comprise error-detecting model be optimized, obtain the 3rd and optimize error-detecting model,
Wherein,
represent three-phase activity coefficient;
Described method also comprises to be obtained when three phases active power and three phase reactive power in setting-up time section before time decompression;
Described according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine that with described error-detecting model corrigendum power error scope step comprises:
Obtain according to described three phases active power and three phase reactive power
According to ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described the 3rd optimization error-detecting model.
By above-mentioned optimization method, only need know that voltage negative phase-sequence degree of unbalancedness, voltage zero sequence degree of unbalancedness, electric current negative phase-sequence degree of unbalancedness, current zero sequence degree of unbalancedness and three-phase activity coefficient can obtain corrigendum power error scope.Thereby greatly reduce calculated amount, improve the efficiency that detects error range.
Further, in order to improve the accuracy of error range, delete abnormal data, can respectively voltage negative phase-sequence degree of unbalancedness, voltage zero sequence degree of unbalancedness, electric current negative phase-sequence degree of unbalancedness, current zero sequence degree of unbalancedness be carried out to ascending order arrangement.Three-phase activity coefficient is carried out to descending sort.The number of every kind of parameter and preset ratio are multiplied each other, obtain data value T, T position parameter in ranking results is made as to the end value that such parameter is calculated.Wherein, parameter comprises voltage negative phase-sequence degree of unbalancedness, voltage zero sequence degree of unbalancedness, electric current negative phase-sequence degree of unbalancedness, current zero sequence degree of unbalancedness and three-phase activity coefficient.Such as, the voltage negative phase-sequence degree of unbalancedness of acquisition is carried out to ascending order arrangement, if preset ratio is 95%, in historical record, there are 100 voltage negative phase-sequence degrees of unbalancedness, select the 95th corresponding voltage negative phase-sequence degree of unbalancedness to carry out error of calculation scope as higher value.For another example, the three-phase activity coefficient of acquisition is carried out to descending sort, if preset ratio is 95%, in historical record, have 100 three-phase activity coefficients, select the 95th corresponding three-phase activity coefficient of rank to carry out error of calculation scope as smaller value.This embodiment, has deleted abnormal data, has improved the accuracy of corrigendum power error scope.Meanwhile, owing to first the data in historical record being carried out to filtration treatment, then the data of filtration treatment are carried out to error calculating, greatly reduced operand, improved detection efficiency.
Various technical characterictics in above embodiment can combine arbitrarily, as long as there is not conflict or contradiction in the combination between feature, but as space is limited, describe one by one, therefore combining arbitrarily of the various technical characterictics in above-mentioned embodiment also belongs to this instructions scope of disclosure.
According to said method, the present invention moves back when a kind of three-phase and four-line electric energy meter one phase decompression is also provided and mends electric weight error detecting system, as shown in Figure 4, during for three-phase and four-line electric energy meter one phase decompression of the present invention, move back the structural representation of mending electric weight error detecting system embodiment, comprising:
Model building module 410, the error-detecting model of positive more when setting up three-phase and four-line electric energy meter one phase decompression:
Wherein, γ represents the more error range of positive, ε
v2represent voltage negative phase-sequence degree of unbalancedness, ε
v0represent voltage zero sequence degree of unbalancedness, ε
i2represent electric current negative phase-sequence degree of unbalancedness, ε
i0represent current zero sequence degree of unbalancedness,
represent the phase differential of residual voltage and zero-sequence current,
represent the phase differential of residual voltage and forward-order current,
represent the phase differential of residual voltage and negative-sequence current,
represent the phase differential of positive sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and zero-sequence current,
represent the phase differential of negative sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and negative-sequence current;
Data acquisition module 420, for obtaining positive-sequence component, negative sequence component and the zero-sequence component when positive-sequence component, negative sequence component, zero-sequence component and the three-phase current of electrical network three-phase voltage in setting-up time section before time decompression;
Parameter determination module 430, for determining ε according to the positive-sequence component of the positive-sequence component of described three-phase voltage, negative sequence component, zero-sequence component and three-phase current, negative sequence component and zero-sequence component
v2, ε
v0, ε
i2, ε
i0,
Error range detection module 440, for according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described error-detecting model, determine to move back according to corrigendum power error scope and mend electric weight error range.
In an embodiment, described model building module, comprising therein:
Correct complex power model building module, for obtaining correct complex power model according to the correct active power model representing with each phase voltage electric current;
Corrigendum complex power model building module, for obtaining corrigendum complex power model according to corrigendum active power model;
The poor model building module of complex power, for asking difference to obtain complex power differential mode type on corrigendum complex power model and correct complex power model;
The poor model building module of active power, obtains active power differential mode type for complex power differential mode type being got to real part;
Product model is set up module, for described correct active power model, positive sequence voltage and the forward-order current representing by phase sequence carried out to product, obtains product model;
Error-detecting model building module, for obtaining error-detecting model according to the ratio of described active power differential mode type and described product model.
In an embodiment, also comprise the first optimization module therein, for move back benefit electric weight error range in acquisition before, error-detecting model be optimized, obtain first and optimize error-detecting model,
Described error range detection module, also for according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described the first optimization error-detecting model.
In an embodiment, also comprise the second optimization module therein, for move back benefit electric weight error range in acquisition before, error-detecting model be optimized, obtain second and optimize error-detecting model,
Described error range detection module, also for according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described the second optimization error-detecting model.
In an embodiment, also comprise that the 3rd optimizes module therein, for move back benefit electric weight error range in acquisition before, error-detecting model be optimized, obtain the 3rd and optimize error-detecting model,
Wherein,
represent three-phase activity coefficient;
Described data acquisition module, also for obtaining when three phases active power and three phase reactive power in setting-up time section before time decompression;
Described error range detection module, also for:
Obtain according to described three phases active power and three phase reactive power
According to ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described the 3rd optimization error-detecting model.
When three-phase and four-line electric energy meter one phase decompression of the present invention, moving back and moving back benefit electric weight error detection method while mending electric weight error detecting system with three-phase and four-line electric energy meter one phase decompression of the present invention is one to one, when above-mentioned three-phase and four-line electric energy meter one phase decompression, move back when the correlation technique feature of mending in electric weight error detection method embodiment and technique effect thereof are all applicable to three-phase and four-line electric energy meter one phase decompression and move back and mend in electric weight error detecting system embodiment, do not repeat them here.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. move back when three-phase and four-line electric energy meter one phase decompression and mend an electric weight error detection method, it is characterized in that, comprising:
The error-detecting model of positive more while setting up three-phase and four-line electric energy meter one phase decompression:
Wherein, γ represents the more error range of positive, ε
v2represent voltage negative phase-sequence degree of unbalancedness, ε
v0represent voltage zero sequence degree of unbalancedness, ε
i2represent electric current negative phase-sequence degree of unbalancedness, ε
i0represent current zero sequence degree of unbalancedness,
represent the phase differential of residual voltage and zero-sequence current,
represent the phase differential of residual voltage and forward-order current,
represent the phase differential of residual voltage and negative-sequence current,
represent the phase differential of positive sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and zero-sequence current,
represent the phase differential of negative sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and negative-sequence current;
Obtain positive-sequence component, negative sequence component and zero-sequence component when positive-sequence component, negative sequence component, zero-sequence component and the three-phase current of electrical network three-phase voltage in setting-up time section before time decompression;
Determine ε according to the positive-sequence component of the positive-sequence component of described three-phase voltage, negative sequence component, zero-sequence component and three-phase current, negative sequence component and zero-sequence component
v2, ε
v0, ε
i2, ε
i0,
According to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described error-detecting model, determine to move back according to corrigendum power error scope and mend electric weight error range.
2. move back when three-phase and four-line electric energy meter one phase decompression according to claim 1 and mend electric weight error detection method, it is characterized in that, the described error-detecting model step of positive more while setting up three-phase and four-line electric energy meter one phase decompression, comprising:
Obtain correct complex power model according to the correct active power model representing with each phase voltage electric current;
Obtain corrigendum complex power model according to corrigendum active power model;
Ask difference to obtain complex power differential mode type on corrigendum complex power model and correct complex power model;
Complex power differential mode type is got to real part and obtain active power differential mode type;
Described correct active power model, positive sequence voltage and the forward-order current representing by phase sequence carried out to product, obtain product model;
Obtain error-detecting model according to the ratio of described active power differential mode type and described product model.
3. move back when three-phase and four-line electric energy meter one phase decompression according to claim 1 and mend electric weight error detection method, it is characterized in that, before obtaining and moving back and mend electric weight error range, also comprise error-detecting model is optimized, obtain first and optimize error-detecting model,
Described according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine that with described error-detecting model corrigendum power error scope step comprises: according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described the first optimization error-detecting model.
4. move back when three-phase and four-line electric energy meter one phase decompression according to claim 1 and mend electric weight error detection method, it is characterized in that, before obtaining and moving back and mend electric weight error range, also comprise error-detecting model is optimized, obtain second and optimize error-detecting model,
Described according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine that with described error-detecting model corrigendum power error scope step comprises: according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described the second optimization error-detecting model.
5. move back when three-phase and four-line electric energy meter one phase decompression according to claim 1 and mend electric weight error detection method, it is characterized in that, before obtaining and moving back and mend electric weight error range, also comprise error-detecting model is optimized, obtain the 3rd and optimize error-detecting model,
Wherein,
represent three-phase activity coefficient;
Described method also comprises to be obtained when three phases active power and three phase reactive power in setting-up time section before time decompression;
Described according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine that with described error-detecting model corrigendum power error scope step comprises:
Obtain according to described three phases active power and three phase reactive power
According to ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described the 3rd optimization error-detecting model.
6. move back when three-phase and four-line electric energy meter one phase decompression and mend an electric weight error detecting system, it is characterized in that, comprising:
Model building module, the error-detecting model of positive more when setting up three-phase and four-line electric energy meter one phase decompression:
Wherein, γ represents the more error range of positive, ε
v2represent voltage negative phase-sequence degree of unbalancedness, ε
v0represent voltage zero sequence degree of unbalancedness, ε
i2represent electric current negative phase-sequence degree of unbalancedness, ε
i0represent current zero sequence degree of unbalancedness,
represent the phase differential of residual voltage and zero-sequence current,
represent the phase differential of residual voltage and forward-order current,
represent the phase differential of residual voltage and negative-sequence current,
represent the phase differential of positive sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and zero-sequence current,
represent the phase differential of negative sequence voltage and forward-order current,
represent the phase differential of negative sequence voltage and negative-sequence current;
Data acquisition module, for obtaining positive-sequence component, negative sequence component and the zero-sequence component when positive-sequence component, negative sequence component, zero-sequence component and the three-phase current of electrical network three-phase voltage in setting-up time section before time decompression;
Parameter determination module, for determining ε according to the positive-sequence component of the positive-sequence component of described three-phase voltage, negative sequence component, zero-sequence component and three-phase current, negative sequence component and zero-sequence component
v2, ε
v0, ε
i2, ε
i0,
Error range detection module, for according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described error-detecting model, determine to move back according to corrigendum power error scope and mend electric weight error range.
7. move back when three-phase and four-line electric energy meter one phase decompression according to claim 6 and mend electric weight error detecting system, it is characterized in that, described model building module, comprising:
Correct complex power model building module, for obtaining correct complex power model according to the correct active power model representing with each phase voltage electric current;
Corrigendum complex power model building module, for obtaining corrigendum complex power model according to corrigendum active power model;
The poor model building module of complex power, for asking difference to obtain complex power differential mode type on corrigendum complex power model and correct complex power model;
The poor model building module of active power, obtains active power differential mode type for complex power differential mode type being got to real part;
Product model is set up module, for described correct active power model, positive sequence voltage and the forward-order current representing by phase sequence carried out to product, obtains product model;
Error-detecting model building module, for obtaining error-detecting model according to the ratio of described active power differential mode type and described product model.
8. move back when three-phase and four-line electric energy meter one phase decompression according to claim 6 and mend electric weight error detecting system, it is characterized in that, also comprise the first optimization module, for move back benefit electric weight error range in acquisition before, error-detecting model is optimized, obtains first and optimize error-detecting model
Described error range detection module, also for according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described the first optimization error-detecting model.
9. move back when three-phase and four-line electric energy meter one phase decompression according to claim 6 and mend electric weight error detecting system, it is characterized in that, also comprise the second optimization module, for move back benefit electric weight error range in acquisition before, error-detecting model is optimized, obtains second and optimize error-detecting model
Described error range detection module, also for according to described ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described the second optimization error-detecting model.
10. move back when three-phase and four-line electric energy meter one phase decompression according to claim 6 and mend electric weight error detecting system, it is characterized in that, also comprise that the 3rd optimizes module, for move back benefit electric weight error range in acquisition before, error-detecting model is optimized, obtains the 3rd and optimize error-detecting model
Wherein,
represent three-phase activity coefficient;
Described data acquisition module, also for obtaining when three phases active power and three phase reactive power in setting-up time section before time decompression;
Described error range detection module, also for:
Obtain according to described three phases active power and three phase reactive power
According to ε
v2, ε
v0, ε
i2, ε
i0,
determine corrigendum power error scope with described the 3rd optimization error-detecting model.
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