CN104111379A - Transformer district line loss rate flexible analysis algorithm process - Google Patents

Transformer district line loss rate flexible analysis algorithm process Download PDF

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Publication number
CN104111379A
CN104111379A CN201310138549.2A CN201310138549A CN104111379A CN 104111379 A CN104111379 A CN 104111379A CN 201310138549 A CN201310138549 A CN 201310138549A CN 104111379 A CN104111379 A CN 104111379A
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China
Prior art keywords
line loss
per unit
loss per
phase
district
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CN201310138549.2A
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CN104111379B (en
Inventor
杨海涛
夏正侃
史涛
李昕
施灵
王颖韬
赵珺
金景明
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State Grid Corp of China SGCC
Shanghai Municipal Electric Power Co
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State Grid Corp of China SGCC
Shanghai Municipal Electric Power Co
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Abstract

The invention relates to a transformer district line loss rate flexible analysis algorithm process and belongs to the electricity consumption management field. The flexible analysis algorithm process includes the following steps that: influences of reactive power compensation insufficiency and three-phase unbalance are eliminated for a transformer district of which the loss rate has a positive value, and a correction value of the loss rate is calculated; false wiring types of a current transformer in a load recording instrument are indentified through utilizing measurement data of a typical month; and the electricity supply quantity of the transformer district and the correction value of the loss rate are estimated according to the false wiring types of the current transformer in the load recording instrument and the measurement data. With the transformer district line loss rate flexible analysis algorithm process adopted, on the one hand, data exception can be identified and corrected, and on the other hand, cross influences of power factors and three-phase unbalance can be eliminated from the loss rate with a positive value, and therefore, transformer district line loss rate analysis results can become an authentic reliable basis for the discrimination of serious electricity stealing areas; the transformer district line loss rate flexible analysis algorithm process enables practical significances for power supply companies in electricity stealing-prevention working efficiency improvement and electricity stealing loss risk reduction. The transformer district line loss rate flexible analysis algorithm process of the invention can be widely used in the electricity consumption management field.

Description

The flexible analytical algorithm flow process of a kind of platform district's line loss per unit
Technical field
The invention belongs to management of power use field, relate in particular to a kind of analysis for platform district line loss per unit, computing method.
Background technology
Oppose electricity-stealing to safeguarding supply order, ensureing that the legitimate income of electric power safety, protection country and electric company is significant; Meanwhile, disguised and dispersed due to stealing, opposing electricity-stealing is also a difficult problem that perplexs for a long time power supply enterprise.Within 2007, rise, Shanghai Electric Power Co comes into effect the line loss work that becomes more meticulous, to low-voltage platform area, measure delivery He Tai district of Tai district total electricity sales amount same period by comparison load measuring-recording instrument and obtain platform district line loss per unit, and then judge occurred frequently district of stealing according to line loss per unit height, can dwindle thus power utility check scope, significantly improve power utility check efficiency.
The electricity charge loss that electric company suffers because of user's (approximately) behavior violating the regulations is still very considerable but in recent years in some areas, especially, as the land, town and country of electric company's administration, stealing electricity phenomenon is still high! After analyzing reason, find:
(1), in power supply service chaining, working is expanded work inquirys-dress table and is connect the replacing of electricity-electric power meter and fault handling-power utility check-operating management etc. each link and all have the hidden danger that may cause stealing to be lost.If to causing, the hidden danger of stealing loss is early found, early prevention, preventive measure initiatively and inspection measure are afterwards combined, more can effectively hit electricity filching behavior.Therefore, be necessary the stealing loss hidden danger of the each link of combing, set up electric company and take precautions against risk assessment and the Risk Control System that stealing is lost.
(2) important step of power utility check in being still and opposing electricity-stealing, inspection efficiently needs reliable stealing suspicious user information source, but there are two defects in Tai district line loss per unit analytical approach at present: 1. compare by supply and distribution the low-voltage platform area line loss per unit obtaining and occur that abnormal data (is zero, for negative) phenomenon very frequent, wiring error problem when this wherein may have load measuring-recording instrument to install, also may be by instrument for measuring and recording body or communication failure problem, also may You Tai the problem (as do not mated etc. at change-family) of district's marketing management, make line loss per unit cannot serve as the foundation of differentiating stealing severely afflicated area, even if 2. find highly on the occasion of line loss per unit after comparison, can not simply correspond to stealing problem occurred frequently, because line loss per unit is also subject to the impact of the factor such as power factor, three-phase imbalance rate.
Therefore, urgent need is developed platform district line loss per unit analytical approach flexibly, can make identification and rectification to data exception on the one hand, from reject the cross influence of power factor, three-phase imbalance rate on the occasion of line loss per unit, make platform district line loss per unit analysis result can really become the reliable basis that stealing severely afflicated area is differentiated on the other hand.
Summary of the invention
Technical matters to be solved by this invention is to provide the flexible analytical algorithm flow process of a kind of platform district line loss per unit, it is for rheology false wiring problem, can be according to the type of the further profiling error wiring of the feature of metric data, it also can correct delivery and line loss per unit according to metric data.
Technical scheme of the present invention is: provide a kind of platform district line loss per unit flexible analytical algorithm flow process, comprise Dui Tai district line loss per unit be on the occasion of month in select typical case month data analyzed, for the search of stealing severely afflicated area provides foundation, it is characterized in that described flexible analytical algorithm flow process comprises the following steps:
A, to line loss per unit on the occasion of Tai district, reject the impact of reactive-load compensation deficiency, three-phase imbalance, ask for line loss per unit correction value;
The false wiring type of current transformer in the metric data identification load measuring-recording instrument of B, the utilization typical case moon;
C, according to the correction value of the false wiring type of current transformer in load measuring-recording instrument and measurement data estimation platform district delivery and line loss per unit.
Concrete, the line loss per unit correction value described in it adopts the line loss per unit of following formula computer board district in normal power factor, three-phase equilibrium situation, rejects reactive-load compensation deficiency, the impact of three-phase imbalance on line loss per unit with this:
E G , i = 0.85 × 3 × 220 × Σ t = 1 720 I pj , i ( t ) - - - ( 1 - 1 )
In above formula: 0.85 is the lower limit that 10kV distribution substation low-pressure side power factor is required; 220 is low pressure phase voltage ratings; I pj, i(t) be the algebraic mean of i Ge Tai district at t period Circuit Fault on Secondary Transformer three-phase current,
I pj,i(t)=[I a,i(t)+I b,i(t)+I c,i(t)]/3 （1-2）
In upper two formulas, replace each phase actual current by three-phase current average, reject the impact of three-phase imbalance with this; With the alternative actual power factor of power factor lower limit 0.85, the impact of rejecting reactive-load compensation deficiency with this.
In load measuring-recording instrument described in it, the false wiring type of current transformer comprises error-polarity connection and (or) phase sequence mistake, represent " a phase homophase polarity just, two-phase phase sequence reversed polarity just " with W1, represent " a phase homophase polarity anti-, the positive situation of two-phase phase sequence reversed polarity " with W2, relation between load measuring-recording instrument measuring value and actual value is derived, in derivation, suppose that three-phase voltage, electric current are in a basic balance, now three-phase current effective value I of arbitrary period a≈ I b≈ I c≈ I, three-phase voltage effective value U a≈ U b≈ U c≈ U; The power-factor angle on document border is all measured values are characterized with subscript c, there is no the expression actual value of subscript c.
Further, the W1 described in it comprises three kinds of situations, load measuring-recording instrument is because current transformer misconnection is and cause counted by time active power, reactive power, power factor and zero-sequence current effective value I nbe respectively:
I N=0 （2-4）。
Further, the W2 described in it comprises three kinds of wiring, load measuring-recording instrument is because current transformer misconnection is and cause counted by time active power, reactive power, power factor and zero-sequence current effective value be respectively:
I N=2I （2-8）。
Gaining merit by acquisition described Tai district's moon, delivery correction value (is designated as E' p) after, rejecting load measuring-recording instrument current transformer connection mistake Tai district line loss per unit correction value can be calculated as
ΔE % = E P ′ - E s E P ′ × 100 % - - - ( 3 - 1 ) ;
In above formula, E sthe of that month total electricity sales amount in Wei Tai district.
Further, for described W1 type error wiring type, its month delivery corrected formula and is:
E P ′ = 3 · Σ t U pj ( t ) · I pj ( t ) · 0.85 · D d
Wherein
U pj(t)=[U a(t)+U b(t)+U c(t)]/3
I pj(t)=[I a(t)+I b(t)+I c(t)]/3。
Further, for described W2 type error wiring type, its month delivery corrected formula and is:
E P ′ = - 3 2 E P c · D d .
Compared with the prior art, advantage of the present invention is:
1. line loss per unit flexible analytical approach in this TV station district is intended to provide foundation for the search of stealing severely afflicated area, and stealing always causes the routinely high value of line loss per unit, therefore the line loss per unit of noncontinuity abnormal (once in a while, two month very high or null value, negative value) does not belong to the row of the situation of needs investigation.There is noncontinuity null value, negative value Tai district for line loss per unit, and only needed to reject abnormal month of line loss per unit, from line loss per unit be on the occasion of month select typical case and analyzed in month; And emphasis when typical case's month line loss per unit is analyzed is to judge that the line loss per unit in this type of district has or not the impact of reactive-load compensation deficiency or three-phase imbalance, rejects these cross influences;
2. for the situation of line loss per unit continuation null value or negative value, utilize typical case month load measuring-recording instrument metric data, further failure judgement type.Wherein, voltage dephasing can be to phase voltage by 220V, can fill thus delivery and the line loss per unit of disappearance; For rheology false wiring problem, can be according to the type of the further profiling error wiring of the feature of metric data, wherein major part also can be corrected delivery and line loss per unit according to metric data.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the flexible analytical algorithm of platform of the present invention district's line loss per unit.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
In Fig. 1, technical scheme of the present invention provides a kind of platform district line loss per unit flexible analytical algorithm flow process, comprise Dui Tai district line loss per unit be on the occasion of month in select typical case month data analyzed, for the search of stealing severely afflicated area provides foundation, it is characterized in that described flexible analytical algorithm flow process comprises the following steps:
A, to line loss per unit on the occasion of Tai district, reject the impact of reactive-load compensation deficiency, three-phase imbalance, ask for line loss per unit correction value;
The false wiring type of current transformer in the metric data identification load measuring-recording instrument of B, the utilization typical case moon;
C, according to the correction value of the false wiring type of current transformer in load measuring-recording instrument and measurement data estimation platform district delivery and line loss per unit.
As previously mentioned, the object that platform district line loss per unit is analyzed is flexibly that the emphasis of therefore analyzing does not lie in the exact value that obtains platform district line loss per unit for search stealing severely afflicated area provides foundation, but for the convenient height of differentiating platform district boundary of administration loss rate.Therefore, described line loss per unit correction value adopts the line loss per unit of following formula computer board district in normal power factor, three-phase equilibrium situation, rejects reactive-load compensation deficiency, the impact of three-phase imbalance on line loss per unit with this:
E G , i = 0.85 × 3 × 220 × Σ t = 1 720 I pj , i ( t ) - - - ( 1 - 1 )
In above formula: 0.85 is the lower limit that 10kV distribution substation low-pressure side power factor is required; 220 is low pressure phase voltage ratings; I pj, i(t) be the algebraic mean of i Ge Tai district at t period Circuit Fault on Secondary Transformer three-phase current,
I pj,i(t)=[I a,i(t)+I b,i(t)+I c,i(t)]/3 （1-2）
In upper two formulas, replace each phase actual current by three-phase current average, reject the impact of three-phase imbalance with this; With the alternative actual power factor of power factor lower limit 0.85, the impact of rejecting reactive-load compensation deficiency with this.
In load measuring-recording instrument described in it, the false wiring type of current transformer comprises error-polarity connection and (or) phase sequence mistake, represent " a phase homophase polarity just, two-phase phase sequence reversed polarity just " with W1, represent " a phase homophase polarity anti-, the positive situation of two-phase phase sequence reversed polarity " with W2, relation between load measuring-recording instrument measuring value and actual value is derived, in derivation, suppose that three-phase voltage, electric current are in a basic balance, now three-phase current effective value I of arbitrary period a≈ I b≈ I c≈ I, three-phase voltage effective value U a≈ U b≈ U c≈ U; The power-factor angle on document border is all measured values are characterized with subscript c, there is no the expression actual value of subscript c.
Further, the W1 described in it comprises three kinds of situations, load measuring-recording instrument is because current transformer misconnection is and cause counted by time active power, reactive power, power factor and zero-sequence current effective value I nbe respectively:
I N=0 （2-4）。
Further, the W2 described in it comprises three kinds of wiring, load measuring-recording instrument is because current transformer misconnection is and cause counted by time active power, reactive power, power factor and zero-sequence current effective value be respectively:
I N=2I （2-8）。
According to above-mentioned thought, relation between electric parameter measured value and actual value under various Wrong wiring ways is derived one by one, and then can summarize the criterion of various false wirings, can judge according to actual measurement three-phase current, the meritorious and symbol of reactive power and the span of power factor the type of load measuring-recording instrument current transformer false wiring.
For example, for described W1 class Wrong wiring way, its discrimination method can be stated as that " three-phase current, zero-sequence current are almost nil; Meritorious, idle almost nil "; For described W2 class Wrong wiring way, its discrimination method can be stated as " to be had one mutually and only has a phase current <0; P c<0, Q c<0, and
The key of asking for platform district line loss per unit correction value is to ask for the correction value of platform district moon delivery.
Gaining merit by acquisition described Tai district's moon, delivery correction value (is designated as E' p) after, rejecting load measuring-recording instrument current transformer connection mistake Tai district line loss per unit correction value can be calculated as
&Delta;E % = E P &prime; - E s E P &prime; &times; 100 % - - - ( 3 - 1 ) ;
In above formula, E sthe of that month total electricity sales amount in Wei Tai district.
Further, for described W1 type error wiring type, its month delivery corrected formula and is:
E P &prime; = 3 &CenterDot; &Sigma; t U pj ( t ) &CenterDot; I pj ( t ) &CenterDot; 0.85 &CenterDot; D d
Wherein
U pj(t)=[U a(t)+U b(t)+U c(t)]/3
I pj(t)=[I a(t)+I b(t)+I c(t)]/3。
Further, for described W2 type error wiring type, its month delivery corrected formula and is:
E P &prime; = - 3 2 E P c &CenterDot; D d .
Because this figure adopts method for drafting and the mask method of normal process figure, various letter characters also meet gb specification, therefore those skilled in the art is appreciated that its implication and the thinking of dealing with problems completely, therefore the implication of its concrete each step and alphabetical label is no longer carefully stated at this.
Because one aspect of the present invention can be made identification and rectification to data exception, from reject the cross influence of power factor, three-phase imbalance rate on the occasion of line loss per unit, make platform district line loss per unit analysis result can really become the reliable basis that stealing severely afflicated area is differentiated on the other hand; Lifting work of electricity anti-stealing efficiency, reduction electric company stealing loss risk are had to realistic meaning.
The present invention can be widely used in management of power use field.

Claims (8)

  1. The flexible analytical algorithm flow process of 1.Yi Zhongtai district line loss per unit, comprise Dui Tai district line loss per unit be on the occasion of month in select the data in typical case's month and analyzed, for stealing severely afflicated area search provides foundation, it is characterized in that described flexible analytical algorithm flow process comprises the following steps:
    A, to line loss per unit on the occasion of Tai district, reject the impact of reactive-load compensation deficiency, three-phase imbalance, ask for line loss per unit correction value;
    The false wiring type of current transformer in the metric data identification load measuring-recording instrument of B, the utilization typical case moon;
    C, according to the correction value of the false wiring type of current transformer in load measuring-recording instrument and measurement data estimation platform district delivery and line loss per unit.
  2. 2. according to claimed in claim 1 the flexible analytical algorithm flow process of district's line loss per unit, it is characterized in that described line loss per unit correction value adopts the line loss per unit of following formula computer board district in normal power factor, three-phase equilibrium situation, rejects reactive-load compensation deficiency, the impact of three-phase imbalance on line loss per unit with this:
    In above formula: 0.85 is the lower limit that 10kV distribution substation low-pressure side power factor is required; 220 is low pressure phase voltage ratings; I pj, i(t) be the algebraic mean of i Ge Tai district at t period Circuit Fault on Secondary Transformer three-phase current,
    I pj,i(t)=[I a,i(t)+I b,i(t)+I c,i(t)]/3 （1-2）
    In upper two formulas, replace each phase actual current by three-phase current average, reject the impact of three-phase imbalance with this; With the alternative actual power factor of power factor lower limit 0.85, the impact of rejecting reactive-load compensation deficiency with this.
  3. 3. according to claimed in claim 1 the flexible analytical algorithm flow process of district's line loss per unit, the false wiring type that it is characterized in that current transformer in described load measuring-recording instrument comprises error-polarity connection and (or) phase sequence mistake, represent " a phase homophase polarity just, two-phase phase sequence reversed polarity just " with W1, represent " a phase homophase polarity anti-, the positive situation of two-phase phase sequence reversed polarity " with W2, relation between load measuring-recording instrument measuring value and actual value is derived, in derivation, suppose that three-phase voltage, electric current are in a basic balance, now three-phase current effective value I of arbitrary period a≈ I b≈ I c≈ I, three-phase voltage effective value U a≈ U b≈ U c≈ U; The power-factor angle on document border is all measured values are characterized with subscript c, there is no the expression actual value of subscript c.
  4. 4. according to claimed in claim 3 the flexible analytical algorithm flow process of district's line loss per unit, it is characterized in that described W1 comprises three kinds of situations, load measuring-recording instrument is because current transformer misconnection is and cause counted by time active power, reactive power, power factor and zero-sequence current effective value I nbe respectively:
    meaningless (2-3);
    I N=0 （2-4）。
  5. 5. according to claimed in claim 3 the flexible analytical algorithm flow process of district's line loss per unit, it is characterized in that described W2 comprises three kinds of wiring, load measuring-recording instrument is because current transformer misconnection is and cause counted by time active power, reactive power, power factor and zero-sequence current effective value be respectively:
    I N=2I （2-8）。
  6. 6. according to claimed in claim 1 the flexible analytical algorithm flow process of district's line loss per unit, it is characterized in that (being designated as E' at the delivery correction value of gaining merit by acquisition described Tai district's moon p) after, rejecting load measuring-recording instrument current transformer connection mistake Tai district line loss per unit correction value can be calculated as
    In above formula, E sthe of that month total electricity sales amount in Wei Tai district.
  7. 7. according to line loss per unit flexible analytical algorithm flow process in Tai district described in claim 1,3 or 6, it is characterized in that for described W1 type error wiring type, its month delivery corrected formula and is:
    Wherein
    U pj(t)=[U a(t)+U b(t)+U c(t)]/3
    I pj(t)=[I a(t)+I b(t)+I c(t)]/3。
  8. 8. according to line loss per unit flexible analytical algorithm flow process in Tai district described in claim 1,3 or 6, it is characterized in that for described W2 type error wiring type, its month delivery corrected formula and is:
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CN107863770A (en) * 2017-09-30 2018-03-30 国网上海市电力公司 A kind of decision method of low-voltage platform area line loss per unit abnormal cause
CN110749784A (en) * 2019-08-05 2020-02-04 上海大学 Line electricity stealing detection method based on electric power data wavelet analysis
CN112578205A (en) * 2020-12-04 2021-03-30 广东电网有限责任公司江门供电局 Line loss analysis method for correcting technical line loss rate
CN112986750A (en) * 2019-12-13 2021-06-18 国网辽宁省电力有限公司沈阳供电公司 Method for rapidly judging field metering abnormality based on fault tree
CN112986884A (en) * 2021-04-15 2021-06-18 国网山东省电力公司昌邑市供电公司 User metering multiplying power file checking method and system
CN113361983A (en) * 2021-08-11 2021-09-07 国网江西省电力有限公司电力科学研究院 High-loss transformer area technology cause diagnosis method and system
CN114114089A (en) * 2021-11-29 2022-03-01 广西电网有限责任公司 Load curve-based remote judgment method for wrong wiring of three-phase three-wire metering device

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107863770A (en) * 2017-09-30 2018-03-30 国网上海市电力公司 A kind of decision method of low-voltage platform area line loss per unit abnormal cause
CN110749784A (en) * 2019-08-05 2020-02-04 上海大学 Line electricity stealing detection method based on electric power data wavelet analysis
CN110749784B (en) * 2019-08-05 2022-07-08 上海大学 Line electricity stealing detection method based on electric power data wavelet analysis
CN112986750A (en) * 2019-12-13 2021-06-18 国网辽宁省电力有限公司沈阳供电公司 Method for rapidly judging field metering abnormality based on fault tree
CN112578205A (en) * 2020-12-04 2021-03-30 广东电网有限责任公司江门供电局 Line loss analysis method for correcting technical line loss rate
CN112986884A (en) * 2021-04-15 2021-06-18 国网山东省电力公司昌邑市供电公司 User metering multiplying power file checking method and system
CN112986884B (en) * 2021-04-15 2021-08-13 国网山东省电力公司昌邑市供电公司 User metering multiplying power file checking method and system
CN113361983A (en) * 2021-08-11 2021-09-07 国网江西省电力有限公司电力科学研究院 High-loss transformer area technology cause diagnosis method and system
CN114114089A (en) * 2021-11-29 2022-03-01 广西电网有限责任公司 Load curve-based remote judgment method for wrong wiring of three-phase three-wire metering device
CN114114089B (en) * 2021-11-29 2023-11-10 广西电网有限责任公司 Remote judging method for error wiring of three-phase three-wire metering device based on load curve

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