CN108663574A - A kind of evaluation method of low-voltage platform area drop damage ability - Google Patents
A kind of evaluation method of low-voltage platform area drop damage ability Download PDFInfo
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- CN108663574A CN108663574A CN201710938877.9A CN201710938877A CN108663574A CN 108663574 A CN108663574 A CN 108663574A CN 201710938877 A CN201710938877 A CN 201710938877A CN 108663574 A CN108663574 A CN 108663574A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
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Abstract
A kind of evaluation method of low-voltage platform area drop damage ability, belongs to fields of measurement.It is divided into the synthetic loss reduction Potential Evaluation of drop the damage Potential Evaluation and multinomial measure of individual event reducing loss measure；Drop damage Potential Evaluation for individual event reducing loss measure includes that the various drops for facilities and administration reason damage Potential Evaluation；It finds the potentiality and key of low-voltage platform area drop damage by data analysis, helps electric company to take corresponding technical, managerial measure with a definite target in view, promotes low-voltage platform area wastage reducing and energy saving.The technical program refines the application value of platform by the existing power information acquisition system of excavation, line loss, realizes the value-rising of existing system, platform.It can be widely used for operational management and the Controlling line loss field of low-voltage platform area.
Description
Technical field
The invention belongs to fields of measurement more particularly to a kind of evaluation methods dropping damage ability for low-voltage platform area.
Background technology
Utilities Electric Co., which carries out line loss fining work, to be had for many years, and current each electric company has put into operation, and " distribution integrates line
Damage management system ", it can be achieved that by-line, the line loss calculation by taiwan area and comparison.This work for grasp line loss distribution provide according to
According to, but find that there are the following problems in practicality：
(1) often there is exceptional value in the problems such as being mismatched due to Source of Gateway Meter wiring error, change family, low-voltage platform area actual measurement line loss per unit
(negative value, abnormal high level) so that actual measurement line loss per unit loses analysis line loss, the meaning of guidance drop damage.For this purpose, being badly in need of proposing line loss
The discrimination method of rate abnormal cause especially recognizes taiwan area line loss per unit exception caused by compound reason and is done to taiwan area line loss per unit
Go out the method for correction.
(2) it to the taiwan area line loss per unit after normal or abnormal correction, needs to propose the judgement rational method of line loss.At present
Using unified threshold value (10%) be used as the whether rational criterion of taiwan area line loss per unit, but actually taiwan area line loss with circuit model,
The high low many factors of the mode of connection, radius of electricity supply, number of users, rate of load condensate are related, and unified threshold criterion not section is arranged
It learns.
(3) final purpose of line loss fine-grained management is drop damage, energy saving, gain, in this regard, only realizing that the metering of line loss is not
No more, it is also necessary to the approach and potentiality of taiwan area analysis wastage reducing and energy saving normal to line loss per unit but unreasonable preferably instruct taiwan area
Wastage reducing and energy saving.
(4) manual method is used to the investigation of line loss per unit exception at present, efficiency is very low, it would be highly desirable to science criterion and sentence
Constant current journey develops corresponding computer-assisted analysis module, realizes the automatic investigation to abnormal line loss per unit, correction and taiwan area drop damage
The assistant analysis of approach, drop damage potentiality, improves the efficiency of Controlling line loss work.
Low-voltage platform area is the key link that line loss occurs.Shanghai Electric Power Co is pacified in distribution transformer secondary side at present
Electric energy meter is filled, bar low pressure side is mounted with load measuring-recording instrument；In power side, is mounted with to low pressure large user load monitoring end
End, other low-voltage customers also incorporate low-voltage collecting meter reading system.All electrical energy measurements in above-mentioned measurement system all use intelligence
Ammeter, especially critical point ammeter not only can measure total active energy, also can measure active split-phase, voltage, electric current.Above-mentioned hardware condition
Possibility is provided for low-voltage platform area line loss anomaly analysis and reasonable sex determination.
Invention content
Technical problem to be solved by the invention is to provide the evaluation methods that damage ability drops in a kind of low-voltage platform area.It is to line loss
Rate is determined as the taiwan area of abnormal (not in zone of reasonableness), proposes line loss per unit abnormal cause discrimination method, specifies possible technical
Or managerial reason, can easily to cover it is technical, managerial including many reasons caused by line loss per unit extremely carry out
Identification and correction.
The technical scheme is that：A kind of evaluation method of low-voltage platform area drop damage ability, it is characterized in that：
The evaluation method is divided into the synthetic loss reduction potentiality of drop the damage Potential Evaluation and multinomial measure of individual event reducing loss measure
Assessment；
Potential Evaluation is damaged for the drop of individual event reducing loss measure, the evaluation method includes various former for facilities and administration
The drop of cause damages Potential Evaluation；
The evaluation method is found the potentiality and key of low-voltage platform area drop damage by data analysis, helps electric company
Corresponding technical, managerial measure is taken with a definite target in view, promotes low-voltage platform area wastage reducing and energy saving；
The evaluation method, by excavating existing power information acquisition system, line loss refines the application value of platform,
Realize the value-rising of existing system, platform.
Specifically, the evaluation method, is determined as line loss per unit abnormal taiwan area, the identification of line loss per unit abnormal cause is proposed
Method specifies possible technical or managerial reason, can to cover it is technical, managerial including many reasons caused by line
Loss rate is recognized and is corrected extremely.
Further, the drop for facilities and administration reason damages Potential Evaluation, includes at least backbone extension diameter reform
Drop damage Potential Evaluation, optimization line load combination drop damage Potential Evaluation, improve three-phase load equilibrium degree drop damage potentiality comment
Estimate, Potential Evaluation is damaged by the drop of reactive-load compensation raising power factor, the unmatched drop damage Potential Evaluation in change-family is corrected, corrects
The drop damage Potential Evaluation that the drop damage Potential Evaluation of CT no-load voltage ratio mistakes and reinforcement are opposed electricity-stealing.
Compared with the prior art, it is an advantage of the invention that：
1. pair line loss per unit is determined as abnormal taiwan area, proposes line loss per unit abnormal cause discrimination method, specify possible technology
Property or managerial reason, can to cover it is technical, managerial including many reasons caused by line loss per unit extremely carry out identification and
Correction；
2. finding the potentiality and key of low-voltage platform area drop damage by data analysis, electric company is helped to take with a definite target in view
Corresponding technical, managerial measure, promotes low-voltage platform area wastage reducing and energy saving；
3. by excavating existing power information acquisition system, line loss refines the application value of platform, realization existing system,
The value-rising of platform.
Specific implementation mode
The present invention will be further described below.
Technical scheme of the present invention, provides a kind of evaluation method of low-voltage platform area drop damage ability, and inventive point is：
The evaluation method is divided into the synthetic loss reduction potentiality of drop the damage Potential Evaluation and multinomial measure of individual event reducing loss measure
Assessment；
Potential Evaluation is damaged for the drop of individual event reducing loss measure, the evaluation method includes various former for facilities and administration
The drop of cause damages Potential Evaluation；
The evaluation method is found the potentiality and key of low-voltage platform area drop damage by data analysis, helps electric company
Corresponding technical, managerial measure is taken with a definite target in view, promotes low-voltage platform area wastage reducing and energy saving；
The evaluation method, by excavating existing power information acquisition system, line loss refines the application value of platform,
Realize the value-rising of existing system, platform.
Specifically, the evaluation method, is determined as line loss per unit abnormal taiwan area, the identification of line loss per unit abnormal cause is proposed
Method specifies possible technical or managerial reason, can to cover it is technical, managerial including many reasons caused by line
Loss rate is recognized and is corrected extremely.
Further, the drop for facilities and administration reason damages Potential Evaluation, includes at least backbone extension diameter reform
Drop damage Potential Evaluation, optimization line load combination drop damage Potential Evaluation, improve three-phase load equilibrium degree drop damage potentiality comment
Estimate, Potential Evaluation is damaged by the drop of reactive-load compensation raising power factor, the unmatched drop damage Potential Evaluation in change-family is corrected, corrects
The drop damage Potential Evaluation that the drop damage Potential Evaluation of CT no-load voltage ratio mistakes and reinforcement are opposed electricity-stealing.
Detailed narration is carried out to the technical program further below.
One, the drop of individual event reducing loss measure damages Potential Evaluation
1, the drop of backbone extension diameter reform damages Potential Evaluation
If the backbone collection of extension diameter reform is in taiwan areaForward and backward unit length electricity is being transformed in wherein i-th time backbone
Resistance is respectively rz,i,1And rz,i,1', then producible monthly drop damage benefit is after extension diameter reform
Taiwan area is become to bar
To distribute-electricity transformer district
Above in two formulas each parameter the same chapter 2 of meaning, branch's line number, each branch wherein in taiwan area on each backbone
The numerical value of practical taiwan area can be used in isoelectric point number on line, can also be substituted into mark post value when actual value is difficult to count.
Obtain the low-voltage platform area line loss correction factor of backbone extension diameter reform finally by upper two formula
In above formula, LzFor backbone set, remaining symbol meaning is the same.
2, the drop of optimization line load combination damages Potential Evaluation
Optimize the taiwan area implementation that the load combined situation on circuit mainly mixes residence-quotient, Ju-non-two classes load nature of electricity consumed,
Its meaning is the characteristic for making full use of residential electricity consumption evening peak rather than residential electricity consumption peak on daytime, stabilizes a day power load, reduces
The load form factor of line load.
If load form factor optimum value corresponding with taiwan area load nature of electricity consumed is K*, according to the hourly load of Source of Gateway Meter measurement
The calculated actual load form factor of data is K (K>K*), then optimize line load combination, be reduced to load form factor
K*Producible moon drop damage benefit is afterwards
Taiwan area is become to bar
To distribute-electricity transformer district
Equally, the numerical value of practical taiwan area can be used in each parameter in above formula, and mark post value can be also used when actual value is difficult to count
It substitutes into.
Obtain the low-voltage platform area line loss correction factor of line load Combinatorial Optimization finally by upper two formula
3, the drop for improving three-phase load equilibrium degree damages Potential Evaluation
If according to the derivation of 3.2.4 sections it is found that setting phase current degree of unbalancedness
Then the three characteristics of the middle term is uneven and increased power attenuation is
To each taiwan area not on the same day different moments call together survey three groups of phase currents, the power of three different moments can be obtained by above formula
Loss, average power consumption is indicated with the mean value of three dataThen of that month line loss increased due to three-phase imbalance,
Namely achievable moon drop damage benefit is when three-phase rigorous equilibrium
In above formula, ndFor of that month number of days.
Correspondingly, the corresponding low-voltage platform area line loss correction factor of three-phase load equilibrium degree must be improved finally being
4, the drop that power factor is improved by reactive-load compensation damages Potential Evaluation
By above-mentioned formula as it can be seen that under conditions of the active power of transmission is constant, when power factor fromIt is increased toWhen, the range of decrease of power attenuation
To, by power factor fromIt is increased toObtainable moon drop damages benefit and is
In above formula, E0For taiwan area this month power supply volume, Δ E% is taiwan area line loss per unit statistical value.Following table lists before and after adjustment
Power attenuation range of decrease when power factor is different value considers when actual assessment to be promoted to power from taiwan area power factor measured value
The line loss per unit range of decrease of factor zone of reasonableness lower limit 0.85.
The corresponding line loss correction factor for being improved power factor is
The power attenuation range of decrease before and after adjustment different table 5-1 corresponding to power factor value
5, it corrects the unmatched drop in change-family and damages Potential Evaluation
After finding the unmatched two associations taiwan area in change-family, by investigating large user's working capacity, information can be found
Specific large user family number with mistake, if user's this month electricity consumption is Ec, then
(1) it is E for counting electricity consumption morecTaiwan area, this month drop damage benefit
ΔAmc=-Ec
Line loss correction factor is accordingly
Negative drop damage benefit and line loss per unit correction factor indicate that taiwan area practical line loss is increased relative to former statistical value.
(2) it is E for few meter electricity consumptioncTaiwan area, this month drop damage benefit
ΔAmc=Ec
Line loss correction factor is accordingly
6, the drop for correcting CT no-load voltage ratio mistakes damages Potential Evaluation
There are the taiwan areas of Source of Gateway Meter CT no-load voltage ratio mistakes to being determined as, if set when former taiwan area power supply volume calculates no-load voltage ratio used as
γCT, the no-load voltage ratio after correction is γ 'CT, then of that month to drop damage benefit
ΔACT=E0·(γCT-γ'CT)
Line loss correction factor is accordingly
It merits attention, corrects CT no-load voltage ratios and taiwan area line loss per unit is not necessarily made to decline.Work as γCT＞ γ 'CTWhen, upper two formula
Value is that just, corresponding drop damage benefit (being actually the drop-out value of line loss per unit statistical value) is just；Conversely, then line loss per unit statistical value
Risen.
7, reinforce the drop damage Potential Evaluation opposed electricity-stealing
The user for searching out the of that month doubtful stealing of target taiwan area collects Cs.Corresponding taiwan area thoroughly can held back as the following formula as a result,
Producible moon drop damage benefit is (being substantially the slippage of taiwan area line loss statistical value) after stealing problem processed
In above formula, χ % still indicate the accuracy rate of MOTA methods；Ec,iIndicate that user collects CsIn i-th of the suspicious use of user's stealing
Family this month electricity consumption.
Correspondingly, the line loss correction factor that the taiwan area is reinforced opposing electricity-stealing is
Two, the synthetic loss reduction potential evaluation method of multinomial measure
If above-mentioned assessment have multinomial measure be suitable for target taiwan area, the taiwan area this month implement this multinomial measure after can generate
Drop damage benefit be
In above formula,Indicate the reducing loss measure collection suitable for target taiwan area, εiIt is defined for each trifle in 5.4.1 various
Line loss correction factor under reducing loss measure；Remaining symbol meaning is the same.Above-mentioned drop damage benefit is in target taiwan area this month line loss per unit
Rise Δ A/E0× 100% percentage point.
Technical scheme of the present invention is determined as line loss per unit abnormal taiwan area, it is proposed that targetedly line loss per unit is abnormal
Reason discrimination method specifies possible technical or managerial reason, targetedly proposes the measure of taiwan area wastage reducing and energy saving
It is recommended that excavating the potentiality of all kinds of taiwan area wastage reducing and energy savings；Can to cover it is technical, managerial including many reasons caused by line loss
Rate is recognized and is corrected extremely；It finds the potentiality and key of low-voltage platform area drop damage by data analysis, can help public affairs of powering
Department takes corresponding technical, managerial measure with a definite target in view, promotes low-voltage platform area wastage reducing and energy saving；It is by excavating existing use
The application value of power utilization information collection system, line loss fining platform, realizes the value-rising of existing system, platform.
It the method can be widely used in operational management and the Controlling line loss field of low-voltage platform area.
Claims (3)
1. a kind of evaluation method of low-voltage platform area drop damage ability, it is characterized in that：
The evaluation method is divided into the synthetic loss reduction Potential Evaluation of drop the damage Potential Evaluation and multinomial measure of individual event reducing loss measure；
Potential Evaluation is damaged for the drop of individual event reducing loss measure, the evaluation method includes various for facilities and administration reason
Drop damage Potential Evaluation；
The evaluation method is found the potentiality and key of low-voltage platform area drop damage by data analysis, electric company is helped to have
It takes corresponding technical, managerial measure with putting arrow, promotes low-voltage platform area wastage reducing and energy saving；
The evaluation method, by excavating existing power information acquisition system, line loss refines the application value of platform, realizes
The value-rising of existing system, platform.
2. the evaluation method of drop damage ability in low-voltage platform area described in accordance with the claim 1, it is characterized in that the evaluation method, right
Line loss per unit is determined as abnormal taiwan area, proposes line loss per unit abnormal cause discrimination method, specifies possible technical or managerial original
Cause, can to cover it is technical, managerial including many reasons caused by line loss per unit recognized and corrected extremely.
3. the evaluation method of drop damage ability in low-voltage platform area described in accordance with the claim 1, it is characterized in that described be directed to equipment and pipe
The drop damage Potential Evaluation for managing reason includes at least the drop damage Potential Evaluation of backbone extension diameter reform, optimization line load combines
Drop damage Potential Evaluation, the drop for dropping damage Potential Evaluation, improving power factor by reactive-load compensation for improving three-phase load equilibrium degree are damaged
Potential Evaluation corrects the unmatched drop damage Potential Evaluation in change-family, corrects the drop damage Potential Evaluation of CT no-load voltage ratio mistakes and reinforce anti-steal
The drop of electricity damages Potential Evaluation.
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| CN110927480A (en) * | 2019-11-02 | 2020-03-27 | 国网上海市电力公司 | Low-voltage transformer area loss reduction method for HPLC application environment |
| CN114362134A (en) * | 2021-11-06 | 2022-04-15 | 国网河南省电力公司新乡供电公司 | Medium-voltage line loss reduction method based on line loss qualified rate |
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