CN109754123A - The distance weighted positioned alternate method of rotation centerline that feeder line supply district divides - Google Patents
The distance weighted positioned alternate method of rotation centerline that feeder line supply district divides Download PDFInfo
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- CN109754123A CN109754123A CN201910028470.1A CN201910028470A CN109754123A CN 109754123 A CN109754123 A CN 109754123A CN 201910028470 A CN201910028470 A CN 201910028470A CN 109754123 A CN109754123 A CN 109754123A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
A kind of distance weighted positioned alternate method of rotation centerline that feeder line supply district divides: by geographical location, relatively close, temporal characteristics complementation load is divided into a feeder line supply district, and building considers the evaluation index that the feeder line supply district of part throttle characteristics complementation divides in feeder line supply district；The method for establishing the distance weighted positioned alternate of rotation centerline divided for feeder line supply district, it is that the rain brush for being used to obtain fan-shaped supply district is waved to searching algorithm to combine with the characteristic of line powering range partition problem, it is firstly introduced into two weighted factors, the weighted factor for considering the equilibrium degree of supply district load summation peak value, considers the weighted factor of the equilibrium degree of each supply district peak-valley difference；Multiple groups initial centerline is set and obtains different demarcation scheme to promote the quality of division result, the method for ultimately forming the distance weighted positioned alternate of rotation centerline.The present invention provides the electric energy of safe and high quality for user, reduces grid net loss, improves the economic benefit of power grid construction and operation.
Description
Technical field
The present invention relates to a kind of feeder line supply district division methods.More particularly to it is a kind of suitable for network topology work
The distance weighted positioned alternate method of rotation centerline that feeder line supply district divides.
Background technique
Distribution network planning is the basal conditions of the result and existing network according to planning period load prediction, is determined optimal
System Construction scheme makes construction and the running cost of power distribution network under the premise of meeting load growth and safe and reliable supply electric energy
With minimum.The Electric Power Network Planning of science, is conducive to the operation and management level and operational efficiency of raising system, can also reduce system
Via net loss improves power supply reliability, and to realize that power distribution automation provides basis.
Existing traditional distribution network planning method is mainly rule of thumb proposed by planning personnel, is both needed to control according to city
Based on the peak load prediction result for the electricity consumption cell that block road and land character are divided in property concrete plan processed, and
Distribution line peak load is characterized using simultaneity factor and it supplies the numerical relation between each cell peak load, and then carries out rule
It draws.Such empirical value is difficult to the double influence of accurate characterization each electricity consumption cell load size and part throttle characteristics, will lead to each item
The problems such as line load peak-valley difference is larger, the programme realized on this basis according to N-1 criterion, although the whole network maximum is negative
The utilization rate of equipment and installations at lotus moment still in zone of reasonableness, but from utilization rate of equipment and installations from the perspective of annual or entire life cycle will from
In reduced levels.
Summary of the invention
The technical problem to be solved by the invention is to provide one kind can preferably realize that the power supply of distribution network planning is reliable
Property and economy Integrated optimization feeder line supply district divide the distance weighted positioned alternate method of rotation centerline.
The technical scheme adopted by the invention is that: a kind of distance weighted alternating of rotation centerline that feeder line supply district divides
Localization method includes the following steps:
1) by geographical location, relatively close, temporal characteristics complementation load is divided into a feeder line supply district, is supplied in feeder line
Building considers the evaluation index that the feeder line supply district of part throttle characteristics complementation divides in electric range；
2) method for establishing the distance weighted positioned alternate of rotation centerline divided for feeder line supply district, is that will be used for
The rain brush for obtaining fan-shaped supply district waves searching algorithm and combines with the characteristic of line powering range partition problem, on the one hand counts
And supply district equilibrium and part throttle characteristics influence and are firstly introduced into two weighted factors, that is, consider supply district load summation peak value
Equilibrium degree weighted factor ω1i, consider the weighted factor ω of the equilibrium degree of each supply district peak-valley difference2ij；On the other hand it is arranged
Multiple groups initial centerline obtains different demarcation scheme to promote the quality of division result, and it is distance weighted to ultimately form rotation centerline
The method of positioned alternate.
Step 1) includes: to be utilized respectively Daily treatment cost index building supply district peak load equilibrium degree index first
LB, using daily load rate index building supply district be averaged daily load rate index LF and using peak-valley ratio building supply district put down
Equal peak-valley ratio index PVR combines index LB, index LF described in three and index PVR to obtain the division of feeder line supply district
Comprehensive assessment index Ffeeder, specific formula is as follows:
Ffeeder=α LB+ β LF+ γ PVR (4)
In formula: mliIndicate the peak load of i-th of feeder line supply district, mlmaxIndicate that each feeder line supply district maximum is negative
The maximum number of numerical value, lf in lotusiIndicate the daily load rate of i-th of feeder line supply district, pvriIndicate i-th of feeder line power supply
The day peak-valley ratio of range, α, β, γ are the weight of three indexs LB, LF and PVR, and the sum of weight is 1, according to different power grid areas
Domain determines specific value, N for the attention degree of different indexsstepIndicate the number of feeder line supply district.
Step 2) includes:
(1) point centered on substation determines M initial centerline using supply district as radius: L1, L2,
... Li ..., LM, be △ θ per the angle between adjacent two initial centerlines1, it is respectively initial with every initial centerline
Side, the point centered on substation rotate clockwise angle △ θ using supply district as radius2Turn to obtain the postrotational center of M item
Line: l1, l2 ..., li ... .lM；
(2) the weighted factor ω for considering supply district load summation peak equalization degree is enabled1iWith each supply district peak valley of consideration
The weighted factor ω of poor equilibrium degree2ijInitial value is 1, determines that load belongs to center line according to Euclidean distance, and according to center line institute
The load position of ownership and following formula carry out angle reorientation:
(3) supply district load summation peak value is updated according to the peak load of each supply district total load and peak-valley difference
The weighted factor ω of equilibrium degree1iWith the weighted factor ω for the equilibrium degree for considering each supply district peak-valley difference2ij,
(4) according to the weighted factor ω for considering supply district load summation peak equalization degree1iWith each supply district peak of consideration
The weighted factor ω of paddy difference equilibrium degree2ijAnd Euclidean distance defines Weighted distance, formula is as follows:
lij=l 'ijω1iω2ij (9)
In formula,Indicate that (angle between the ray and positive direction of the x-axis of Δ x, Δ y), takes direction
Be worth section (- π, π], Δ xjIndicate coordinate of the center line rotation afterload point in positive direction of the x-axis, Δ yjIndicate center line rotation
Coordinate of the afterload point in positive direction of the y-axis；l'ijAnd lijRespectively indicate load point j to i-th initial centerline Li it is vertical away from
From and Weighted distance；PiIndicate the supply district S where initial centerline LiiPeak load, work as PiIt is worth bigger, weighted factor
ω1iValue is also bigger, and the Weighted distance of each load point to initial centerline Li become larger；If load point j is not belonging to initial centerline Li
The supply district at place, εijSupply district where indicating initial centerline Li increases the supply district S after load point jiPeak valley
Difference, otherwise εijSupply district S where indicating initial centerline LiiPeak-valley difference, as supply district SiLoad point j is added to be unfavorable for
Improve supply district peak-valley difference, εijValue can bigger, weighted factor ω2ijIt is worth also bigger, the weighting amplification system of k expression weighted factor
Number；
(5) judge the number N of supply districtstepWhether meet sets requirement, is then to enter in next step, otherwise returns to the
(2) step；
(6) judge whether to calculate to initial centerline LM, be to terminate, otherwise return to (2) step.
The distance weighted positioned alternate method of rotation centerline that feeder line supply district of the invention divides, can guarantee into
When row gridding is planned, the peak-valley difference of route institute on-load entirety is smaller, route needed for route model needed for reducing or reduction
Quantity is conducive to promote route whole year assets utilization efficiency, to preferably realize the power supply reliability and economy of distribution network planning
The Integrated optimization of property.Planning of science activities has been carried out to power distribution network, has optimized electric network composition, power grid construction and transformation is made to have more reasonability
And economy, to reduce grid net loss, improve the economic effect of power grid construction and operation to provide the electric energy of safe and high quality for user
Benefit；By substation location and its supply district of making rational planning for, the operational management and efficiency of power grid can be improved；By optimizing net
Frame structure keeps the power supply reliability of power grid and returns of investment higher；The distribution network planning of science is distribution automation planning and reality
The basis applied；Distribution system planning is the important component of electric power enterprise strategic development planning.
Detailed description of the invention
Fig. 1 is the flow chart for the distance weighted positioned alternate method of rotation centerline that feeder line supply district of the present invention divides；
Fig. 2 is the distance weighted positioned alternate method schematic diagram of rotation centerline, wherein (a) is that rotation centerline is distance weighted
Supply district schematic diagram before positioned alternate, (b) be carry out the distance weighted positioned alternate of rotation centerline after supply district show
It is intended to.
Specific embodiment
The distance weighted friendship of rotation centerline that feeder line supply district of the invention is divided below with reference to embodiment and attached drawing
It is described in detail for localization method.
The distance weighted positioned alternate method of rotation centerline that feeder line supply district of the invention divides is based on existing negative
Lotus clustering block and gridding program results consider that electricity consumption cell load characteristic complementation thought draws distribution feeder supply district
Dividing the influence generated, and on this basis, the condensed feeder line supply district for considering part throttle characteristics complementation divides recruitment evaluation index,
The method for dividing two class problem similarities and differences point analysis with distribution line supply district is divided in conjunction with substation's supply district.
As shown in Figure 1, the distance weighted positioned alternate method of rotation centerline that feeder line supply district of the invention divides, packet
Include following steps:
1) by geographical location, relatively close, temporal characteristics complementation load is divided into a feeder line supply district, is supplied in feeder line
Building considers the evaluation index that the feeder line supply district of part throttle characteristics complementation divides in electric range；It include: to be utilized respectively day first
Peak load index is constructed supply district peak load equilibrium degree index LB, is averaged using daily load rate index building supply district
It daily load rate index LF and is averaged peak-valley ratio index PVR using peak-valley ratio building supply district, by index described in three
LB, index LF and index PVR combine to obtain the comprehensive assessment index F of feeder line supply district divisionfeeder, specific formula is as follows:
Ffeeder=α LB+ β LF+ γ PVR (4)
In formula: mliIndicate the peak load of i-th of feeder line supply district, mlmaxIndicate that each feeder line supply district maximum is negative
The maximum number of numerical value, lf in lotusiIndicate the daily load rate of i-th of feeder line supply district, pvriIndicate i-th of feeder line power supply
The day peak-valley ratio of range, α, β, γ are the weight of three indexs LB, LF and PVR, and the sum of weight is 1, according to different power grid areas
Domain determines specific value, N for the attention degree of different indexsstepIndicate the number of feeder line supply district.
2) method for establishing the distance weighted positioned alternate of rotation centerline divided for feeder line supply district, substation supply
If the essence that electric range divides is to do the space that (power transformation station location) is core and divide, being formed by result is usually class circle
Shape region.And the essence that medium-voltage line supply district divides is then, if with core point to fringe radiation in similar round region
Main line is that the space of core divides, and being formed by result should be class fan-shaped region, it is clear that traditional substation's supply district divides
Method is difficult to such issues that be suitable for.It therefore, is that the rain brush for being used to obtain fan-shaped supply district is waved to search to calculate in the present invention
Method is combined with the characteristic of line powering range partition problem, and on the one hand meter and supply district equilibrium and part throttle characteristics influence and first
First introduce two weighted factors, i.e. the weighted factor ω of the equilibrium degree of consideration supply district load summation peak value1i, consider each power supply
The weighted factor ω of the equilibrium degree of range peak-valley difference2ij；On the other hand setting multiple groups initial centerline obtains different demarcation scheme
The quality of promotion division result, the method for ultimately forming the distance weighted positioned alternate of rotation centerline, as shown in Figure 2.Specific packet
It includes:
(1) point centered on substation determines M initial centerline using supply district as radius: L1, L2,
... Li ..., LM, be △ θ per the angle between adjacent two initial centerlines1, it is respectively initial with every initial centerline
Side, the point centered on substation rotate clockwise angle △ θ using supply district as radius2Turn to obtain the postrotational center of M item
Line: l1, l2 ..., li ... .lM；
(2) the weighted factor ω for considering supply district load summation peak equalization degree is enabled1iWith each supply district peak valley of consideration
The weighted factor ω of poor equilibrium degree2ijInitial value is 1, determines that load belongs to center line according to Euclidean distance, and according to center line institute
The load position of ownership and following formula carry out angle reorientation:
(3) supply district load summation peak value is updated according to the peak load of each supply district total load and peak-valley difference
The weighted factor ω of equilibrium degree1iWith the weighted factor ω for the equilibrium degree for considering each supply district peak-valley difference2ij,
(4) according to the weighted factor ω for considering supply district load summation peak equalization degree1iWith each supply district peak of consideration
The weighted factor ω of paddy difference equilibrium degree2ijAnd Euclidean distance defines Weighted distance, formula is as follows:
lij=l 'ijω1iω2ij (9)
In formula,Indicate that (angle between the ray and positive direction of the x-axis of Δ x, Δ y), takes direction
Be worth section (- π, π], Δ xjIndicate coordinate of the center line rotation afterload point in positive direction of the x-axis, Δ yjIndicate center line rotation
Coordinate of the afterload point in positive direction of the y-axis；l'ijAnd lijRespectively indicate load point j to i-th initial centerline Li it is vertical away from
From and Weighted distance；PiIndicate the supply district S where initial centerline LiiPeak load, work as PiIt is worth bigger, weighted factor
ω1iValue is also bigger, and the Weighted distance of each load point to initial centerline Li become larger；If load point j is not belonging to initial centerline Li
The supply district at place, εijSupply district where indicating initial centerline Li increases the supply district S after load point jiPeak valley
Difference, otherwise εijSupply district S where indicating initial centerline LiiPeak-valley difference, as supply district SiLoad point j is added to be unfavorable for
Improve supply district peak-valley difference, εijValue can bigger, weighted factor ω2ijIt is worth also bigger, the weighting amplification system of k expression weighted factor
Number；
(5) judge the number N of supply districtstepWhether meet sets requirement, is then to enter in next step, otherwise returns to the
(2) step；
(6) judge whether to calculate to initial centerline LM, be to terminate, otherwise return to (2) step.
Preferred forms are given below
Certain triangle simply connected network is as follows for the example of calculation situation of electric model: substation is 32 × 31.5MVA, model of powering
Enclose it is inner respectively have 80,83,80 loads, average load size is 430kW, main transformer load factor about 60%.Load shares resident, quotient
Industry, industry, administrative four kinds of load types, share the load curve on spring, summer, autumn and winter on respective working day and weekend each 8 typical days.
Huger in view of line basis data amount, length is limited, numerous to list herein.About feeder line supply district division result and divide
Analysis is as follows.
(1) part throttle characteristics complementation whether is considered when feeder line supply district divides, spy takes feeder line supply district evaluation index
Weight is respectively 1:1:1, is considered three index equal weights.Using two kinds of strategies and three kinds of feeder line models to substation S1 into
Row feeder line supply district divides to compare the difference for whether considering part throttle characteristics complementation.Two kinds of strategies are as follows:
(a) consider that part throttle characteristics is complementary, weighted factor ω1iConsider the equilibrium degree of the peak value of the sum of supply district load,
ω2ijConsider the equilibrium degree of each supply district peak-valley difference；
(b) part throttle characteristics complementation, weighted factor ω are not considered1iConsider the equilibrium degree of the sum of each supply district load peak,
ω2ijIt is not counted in calculating.Pair in terms of minimum line number out, the utilization rate of equipment and installations for assessing average of the whole year load and peak-valley ratio three
Than the results are shown in Table 1.
Substation S1 feeder line splitting scheme under 1 Different Strategies of table and route model
It can see by upper table, as route model LGJ-150, LGJ-185 and LGJ-240, consider that part throttle characteristics is mutual
Substation's minimum feeder line that the policy calculation of benefit obtains goes out that line number is all less, each supply district year utilization rate of equipment and installations mean value all more
Height, average peak-valley ratio are all lower.Therefore, when carrying out the division of feeder line supply district to substation's supply district, consider load
The complementary strategy of characteristic is on the one hand since each supply district can be with more loads, it is possible to reduce substation's number of outgoing is conducive to
It promotes the annual utilization rate of equipment and installations of route and reduces the economic cost of planning；On the other hand, the peak-valley difference of each supply district is smaller,
Be conducive to power grid operation.
(2) consider the feeder line supply district division result of part throttle characteristics mutual added time
The preferable feeder line of each substation is sought according to the feeder line supply district partitioning algorithm of consideration part throttle characteristics complementation to supply
Electric range splitting scheme.Take backbone model LGJ-185, transmission capacity 7.8MW；Feeder line supply district quantity is 10；Often
A substation retains 3 kinds of feeder line supply districts and divides evaluation index preferably feeder line supply district splitting scheme.Each substation
The corresponding index of the preferable 3 kinds of schemes of evaluation index is as shown in table 2.
The evaluation index of table preferably 3 kinds feeder line supply district splitting schemes of 2 substation S1
It can see by upper table, each supply district load factor is more balanced in the optimal case of three substations；Due to occupying
People's type load and the complementarity of administrative type load are stronger, are preferentially divided into resident's type load and administrative type load in optimal case
In the same feeder line supply district, the peak load of supply district total load is reduced, is conducive to promote supply district rate of load condensate simultaneously
Reduce supply district peak-valley ratio.
Claims (3)
1. a kind of distance weighted positioned alternate method of rotation centerline that feeder line supply district divides, which is characterized in that including such as
Lower step:
1) by geographical location, relatively close, temporal characteristics complementation load is divided into a feeder line supply district, in feeder line power supply model
It encloses interior building and considers the evaluation index that the feeder line supply district of part throttle characteristics complementation divides；
2) method for establishing the distance weighted positioned alternate of rotation centerline divided for feeder line supply district, is that will be used to obtain
The rain brush of fan-shaped supply district waves searching algorithm and combines with the characteristic of line powering range partition problem, on the one hand counts and supplies
Electric range equilibrium and part throttle characteristics influence and are firstly introduced into two weighted factors, i.e., consideration supply district load summation peak value is equal
The weighted factor ω of weighing apparatus degree1i, consider the weighted factor ω of the equilibrium degree of each supply district peak-valley difference2ij；On the other hand setting multiple groups
Initial centerline obtains different demarcation scheme to promote the quality of division result, ultimately forms the distance weighted alternating of rotation centerline
The method of positioning.
2. the distance weighted positioned alternate method of rotation centerline that feeder line supply district according to claim 1 divides,
It is characterized in that, step 1) includes: to be utilized respectively Daily treatment cost index building supply district peak load equilibrium degree index first
LB, using daily load rate index building supply district be averaged daily load rate index LF and using peak-valley ratio building supply district put down
Equal peak-valley ratio index PVR combines index LB, index LF described in three and index PVR to obtain the division of feeder line supply district
Comprehensive assessment index Ffeeder, specific formula is as follows:
Ffeeder=α LB+ β LF+ γ PVR (4)
In formula: mliIndicate the peak load of i-th of feeder line supply district, mlmaxIndicate number in each feeder line supply district peak load
It is worth a maximum number, lfiIndicate the daily load rate of i-th of feeder line supply district, pvriIndicate i-th of feeder line supply district
Day peak-valley ratio, α, β, γ are the weight of three indexs LB, LF and PVR, and the sum of weight is 1, according to different Grids for
The attention degree of different indexs determines specific value, NstepIndicate the number of feeder line supply district.
3. the distance weighted positioned alternate method of rotation centerline that feeder line supply district according to claim 1 divides,
It is characterized in that, step 2) includes:
(1) point centered on substation determines M initial centerline using supply district as radius: L1, L2 ... Li ...,
LM, often the angle between adjacent two initial centerlines is △ θ1, respectively using every initial centerline as initial edge, with substation
Centered on point using supply district as radius rotate clockwise angle △ θ2Turn to obtain the postrotational center line of M item: l1,
l2,....,li,....lM；
(2) the weighted factor ω for considering supply district load summation peak equalization degree is enabled1iIt is equal with each supply district peak-valley difference of consideration
The weighted factor ω of weighing apparatus degree2ijInitial value is 1, determines that load belongs to center line according to Euclidean distance, and belonged to according to center line
Load position and following formula carry out angle reorientation:
(3) equilibrium of supply district load summation peak value is updated according to the peak load of each supply district total load and peak-valley difference
The weighted factor ω of degree1iWith the weighted factor ω for the equilibrium degree for considering each supply district peak-valley difference2ij,
(4) according to the weighted factor ω for considering supply district load summation peak equalization degree1iWith each supply district peak-valley difference of consideration
The weighted factor ω of equilibrium degree2ijAnd Euclidean distance defines Weighted distance, formula is as follows:
lij=l'ijω1iω2ij (9)
In formula,It indicates to be directed toward (angle between the ray and positive direction of the x-axis of Δ x, Δ y), value area
Between (- π, π], Δ xjIndicate coordinate of the center line rotation afterload point in positive direction of the x-axis, Δ yjIt is born after indicating center line rotation
Coordinate of the lotus point in positive direction of the y-axis；l'ijAnd lijRespectively indicate load point j to i-th initial centerline Li vertical range and
Weighted distance；PiIndicate the supply district S where initial centerline LiiPeak load, work as PiIt is worth bigger, weighted factor ω1iValue
Also bigger, the Weighted distance of each load point to initial centerline Li become larger；If load point j is not belonging to where initial centerline Li
Supply district, εijSupply district where indicating initial centerline Li increases the supply district S after load point jiPeak-valley difference, otherwise
εijSupply district S where indicating initial centerline LiiPeak-valley difference, as supply district SiLoad point j is added to be unfavorable for improving confession
Electric range peak-valley difference, εijValue can bigger, weighted factor ω2ijIt is worth also bigger, the weighting amplification coefficient of k expression weighted factor；
(5) judge the number N of supply districtstepWhether meet sets requirement, is then to enter in next step, otherwise returns to (2) step；
(6) judge whether to calculate to initial centerline LM, be to terminate, otherwise return to (2) step.
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| CN111431173A (en) * | 2020-03-30 | 2020-07-17 | 国网经济技术研究院有限公司 | Medium-voltage distribution network ring network structure determination method and system considering load complementary characteristics |
| CN114056168A (en) * | 2021-10-28 | 2022-02-18 | 广东电网有限责任公司广州供电局 | Charging station power supply method, control device, computer equipment and storage medium |
| CN114056168B (en) * | 2021-10-28 | 2024-04-12 | 广东电网有限责任公司广州供电局 | Charging station power supply method, control device, computer equipment and storage medium |
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