CN109447465A - A kind of power distribution network planning scheme evaluation method based on collaboration optimization Performance Coefficient - Google Patents
A kind of power distribution network planning scheme evaluation method based on collaboration optimization Performance Coefficient Download PDFInfo
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Abstract
A kind of power distribution network planning scheme evaluation method based on collaboration optimization Performance Coefficient, 1) pass through the factor of Sensitivity Analysis Method analyzing influence power supply capacity and power supply reliability, distribution network transform project is formulated, the power distribution network planning scheme of different voltages rate sequence is constructed；2) collaboration optimization is established than modeling type, and the feasibility of power distribution network planning scheme is judged according to the model；Including measures of effectiveness coefficient and binding target；3) power distribution network planning scheme that step 2) determines multiple and different voltage class sequences respectively is repeated, using the maximum programme of measures of effectiveness coefficient XNPG in the voltage class sequence of acquisition as final power distribution network planning scheme.The present invention can efficiently and effectively select the highest power network planning scheme of cost performance, to promote the science of distribution network planning design, reasonability, the effect of Electric Power Network Planning can be made more effectively to play, improve the comprehensive benefit of power grid.The command and guide effect for promoting Study on Power Grid Planning on the whole, guarantees the normal operation of power supply system.
Description
Technical field
The present invention relates to a kind of power distribution network planning scheme evaluation methods.More particularly to one kind based on collaboration optimization efficiency system
Several power distribution network planning scheme evaluation methods.
Background technique
With the continuous development of electricity market, the economy of Electric Power Network Planning is increasingly taken seriously.As the people are for supplying
The requirement of electric reliability steps up, therefore the economic value of such technical indicator also can to the economy of Electric Power Network Planning
It has an important influence on.
From the point of view of the planning status of current power distribution network, during the economic technology of programme ratio selects specific development, do not have
Have a system, rounded system and specification ensure, be difficult to economic technology optimization than selecting work to play due guidance
Effect causes unnecessary cost input, this is just needed in power network planning scheme to influence the overall construction of power grid
Methods of comparison and selection is optimized using scientific and reasonable economic technology, improves the science and reasonability of distribution network planning.
During the determination of distribution network planning and modification scheme, when selecting specific power supply plan, it must consider that power supply can
It leans on, capital expenditure province, the basic demands such as power supply efficiency height.It according to the regional economic situation of planning and should be born in distribution network planning
Lotus situation, reasonably selects and specifically the technologies such as the voltage class sequence of determining planned project, Power grid structure, capacity-load ratio are former
Then, it under the premise of guaranteeing power supply capacity, also needs to carry out index evaluation to its reliability and economy.Current most planning
Scheme evaluation both for power distribution network a certain item (such as economic benefit, power supply reliability etc.) Lai Jinhang, using such rule
Appraisal procedure is drawn technology and economic means is difficult to consider to study comprehensively.Therefore, synthesis is carried out to power distribution network planning scheme to determine
It measures technical economic analysis to calculate, to achieve the purpose that power network planning scheme is instructed to select, have to the comprehensive benefit for improving power grid
Highly important meaning.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of technological layer for comprehensively considering Electric Power Network Planning and economic ladders
Face, being capable of the more scientific distribution network planning based on collaboration optimization Performance Coefficient for effectively preferably going out power distribution network planning scheme
Schemes evaluation method.
The technical scheme adopted by the invention is that: a kind of power distribution network planning scheme evaluation based on collaboration optimization Performance Coefficient
Method includes the following steps:
1) factor for passing through Sensitivity Analysis Method analyzing influence power supply capacity and power supply reliability, formulates distribution network transform
Project constructs the power distribution network planning scheme of different voltages rate sequence；
2) collaboration optimization is established than modeling type, and the feasibility of power distribution network planning scheme is judged according to the model；Including
Measures of effectiveness coefficient and binding target；
3) power distribution network planning scheme that step 2) determines multiple and different voltage class sequences respectively is repeated, with the voltage of acquisition
The maximum programme of measures of effectiveness coefficient XNPG is as final power distribution network planning scheme in rate sequence.
Pass through the factor of Sensitivity Analysis Method analyzing influence power supply capacity and power supply reliability, packet described in step 1)
It includes:
(1) by Sensitivity Analysis Method analyzing influence power supply capacity because being known as:
(1.1) sensitivity coefficient of substation capacity, the sensitivity coefficient L of substation capacity are calculatedAIt indicates are as follows:
Wherein, YS is the power supply capacity of unit land area, and Δ YS is the variable quantity of the power supply capacity of unit land area,
A is substation's total capacity, and Δ A is the variable quantity of substation capacity, and η is load factor,For power factor, S is power supply area
Area；LA≥1；The sensitivity coefficient L of substation capacityAIt is higher, it is bigger to the castering action of power supply capacity；
(1.2) reactive compensation sensitivity coefficient, the sensitivity coefficient L of reactive compensation are calculatedQIt indicates are as follows:
Wherein, Q is reactive compensation capacity, and Δ Q is the variable quantity of reactive compensation capacity；The sensitivity coefficient L of reactive compensationQ
It is higher, it is bigger to the castering action of power supply capacity；
(2) by Sensitivity Analysis Method analyzing influence power supply reliability because being known as:
(2.1) the sensitivity coefficient L of power failure frequency is calculatedIFIt indicates are as follows:
Wherein, ASAI is power supply reliability, and Δ ASAI is the variable quantity of power supply reliability, and IF is power failure frequency, and Δ IF is
The variable quantity of power failure frequency；The sensitivity coefficient L of power failure frequencyIFIt is higher, it is bigger to the influence of power supply reliability；
(2.2) the sensitivity coefficient L of power off time is calculatedtAre as follows:
Wherein, t is power off time, UiIndicate load point i average year idle time, NiImpacted number of users when for failure；
The sensitivity coefficient L of power off timetIt is higher, it is bigger to the influence of power supply reliability；
(2.3) the sensitivity coefficient L of scope of power outage is calculatedArAre as follows:
Wherein, Ar is scope of power outage；The sensitivity coefficient L of scope of power outageArIt is higher, the influence of power supply reliability is got over
Greatly.
Formulation distribution network transform project described in step 1), building power distribution network planning scheme include:
(1) distribution network transform project is formulated, comprising: newly-built substation project, distribution transforming capacity-increasing transformation engineering, substation, which increase, matches
Reactive compensation engineering, substation implement power distribution automation engineering, substation and newly go out distribution line engineering, power transformation intersite line connection
Network engineering, old line improvement project, distribution line extension line project and distribution line add segmentation engineering；
(2) according to power supply capacity, power supply reliability and planning construction cost of investment, distribution network transform projects combo is different
Power distribution network planning scheme.
Measures of effectiveness coefficient described in step 2) is as follows:
Wherein, XNPG indicates that measures of effectiveness coefficient, YS are the power supply capacity of unit land area, and ASAI is that power supply is reliable
Property, XS is the construction investment of unit area, KCIndicate capacity-load ratio, σ is load density, SbFor substation capacity, S is power supply area
Area, u are line nonlinear factor, and n indicates the number of lines, NBtIndicate certain voltage class substation quantity, ABtFor relevant voltage
The construction investment of grade transformer substation, LXtFor certain voltage class line length, AXtIndicate corresponding unit voltage grade line length L
Construction investment.
Binding target described in step 2) includes:
(1) using unit area construction investment XS as binding target, if being higher than cost of investment upper limit value, distribution network planning
Scheme is invalid；Wherein, the upper limit value is by planning year equal load density power supply area unit area Installed capital cost
Floating 20% chooses or is determined according to expert's resolution；
(2) using the power supply capacity YS of unit land area as binding target, if being lower than power supply capacity lower limit value, distribution
Net programme is invalid；The lower limit value is by planning year equal load density power supply area unit land area for electric energy
Power floats downward 20% selection or is resolved according to expert and determined；
(3) using power supply reliability ASAI as binding target, if being lower than power supply reliability lower limit value, distribution network planning side
Case is invalid；The lower limit value floats downward 5% selection or according to special by planning year equal load density power supply area power supply reliability
Family's resolution determines.
A kind of power distribution network planning scheme evaluation method based on collaboration optimization Performance Coefficient of the invention, for distribution network planning
Optional program is drawn, the optimization of power grid Project cooperation is established than modeling type, corresponding Optimization Solution side is proposed based on measures of effectiveness mode
Method.The present invention can efficiently and effectively select the highest power network planning scheme of cost performance, to promote distribution network planning design
Science, reasonability, the effect of Electric Power Network Planning can be made more effectively to play, improve the comprehensive benefit of power grid.The present invention is in item
The effect that guidance is embodied in mesh deposit, scientific research, design and specific construction, guarantees the realization of project planning science deposit, from whole
The command and guide effect that Study on Power Grid Planning is promoted on body, guarantees the normal operation of power supply system.
Detailed description of the invention
Fig. 1 is measures of effectiveness calculation flow chart in the present invention；
Fig. 2 is measures of effectiveness calculated result figure in the present invention.
Specific embodiment
Below with reference to embodiment and attached drawing to a kind of distribution network planning side based on collaboration optimization Performance Coefficient of the invention
Case evaluation method is described in detail.
A kind of power distribution network planning scheme evaluation method based on collaboration optimization Performance Coefficient of the invention, including walk as follows
It is rapid:
1) factor for passing through Sensitivity Analysis Method analyzing influence power supply capacity and power supply reliability, formulates distribution network transform
Project constructs the power distribution network planning scheme of different voltages rate sequence；Sensitivity Analysis is for a certain influence factor
Minor change causes the evaluation means of target value amplitude of variation size.By comparing the Sensitirity va1ue between each influence factor, energy
Input-output efficiency between projects is enough analyzed, and then provides theoretical foundation for Plan mode.Wherein,
The factor by Sensitivity Analysis Method analyzing influence power supply capacity and power supply reliability, comprising:
(1) power supply capacity of power distribution network is evaluated, it is main to consider substation and main transformer quantity, main transformer capacity and idle configuration
Etc. factors.By Sensitivity Analysis Method analyzing influence power supply capacity because being known as:
(1.1) sensitivity coefficient of substation capacity is calculated
Increase substation gets in touch with scheme between can forming richer station, can in the case where some substation is in malfunction
Load is transferred to the substation of normal operation by load transfer；Increase main transformer quantity in substation to be conducive in station respectively
It is got in touch between main transformer, power cut problem in short-term can be effectively relieved as brought by Repair of Transformer；Main transformer dilatation can be with
On the original basis with more loads.The above various modes have castering action for power grid power supply capacity, and create and compare
The power supply capacity of dilatation scheme is promoted more significant.Since these modes are substantially all the total capacities for increasing main transformer,
Increase substation capacity can be uniformly attributed to.
The sensitivity coefficient L of substation capacityAIt indicates are as follows:
Wherein, YS is the power supply capacity of unit land area, and Δ YS is the variable quantity of the power supply capacity of unit land area,
A is substation's total capacity, and Δ A is the variable quantity of substation capacity, and η is load factor,For power factor, S is power supply area
Area；LA≥1；The sensitivity coefficient L of substation capacityAIt is higher, it is bigger to the castering action of power supply capacity；
(1.2) reactive compensation sensitivity coefficient is calculated
Reactive loss can be reduced, mention under the premise of main transformer capacity, load factor are constant by carrying out reactive compensation to substation
High Power Factor, to improve power supply capacity.The sensitivity coefficient L of reactive compensationQIt indicates are as follows:
Wherein, Q is reactive compensation capacity, and Δ Q is the variable quantity of reactive compensation capacity；The sensitivity coefficient L of reactive compensationQ
It is higher, it is bigger to the castering action of power supply capacity；
(2) by Sensitivity Analysis Method analyzing influence power supply reliability because being known as:
Power supply reliability is to measure the whether strong important evidence of a power grid.When before and after Singapore's power grid after 10 years
Between, the great-leap-forward development of reliability is realized, averagely power supply Availability Index can achieve six nine at present.
The power supply reliability of power distribution network is horizontal to be mainly reflected in three power failure frequency, power off time and scope of power outage aspects.
(2.1) sensitivity coefficient of power failure frequency can characterize the severity of distribution system stoppage in transit, calculate power failure frequency
Sensitivity coefficient LIFIt indicates are as follows:
Wherein, ASAI is power supply reliability, and Δ ASAI is the variable quantity of power supply reliability, and IF is power failure frequency, and Δ IF is
The variable quantity of power failure frequency；The sensitivity coefficient L of power failure frequencyIFIt is higher, it is bigger to the influence of power supply reliability；
(2.2) interruption duration reflects the level of a regional power distribution automation.For faulty section route, when power failure
Between to maintenance the time required to it is related；For non-faulting section route, the load transfer time directly determines the length of its power off time
It is short.Calculate the sensitivity coefficient L of power off timetAre as follows:
Wherein, t is power off time, UiIndicate load point i average year idle time, NiImpacted number of users when for failure；
The sensitivity coefficient L of power off timetIt is higher, it is bigger to the influence of power supply reliability；
(2.3) scope of power outage refers to the when amount that it is influenced that single has a power failure.For unlimited power cut, scope of power outage is mainly by net
Network structure influences；Have a power failure for rationing the power supply, scope of power outage is directly related with power load distributing and its significance level.Calculate scope of power outage
Sensitivity coefficient LArAre as follows:
Wherein, Ar is scope of power outage；The sensitivity coefficient L of scope of power outageArIt is higher, the influence of power supply reliability is got over
Greatly.
The formulation distribution network transform project, building power distribution network planning scheme include:
(1) distribution network transform project is formulated, comprising: newly-built substation project, distribution transforming capacity-increasing transformation engineering, substation, which increase, matches
Reactive compensation engineering, substation implement power distribution automation engineering, substation and newly go out distribution line engineering, power transformation intersite line connection
Network engineering, old line improvement project, distribution line extension line project and distribution line add segmentation engineering；
(2) according to power supply capacity, power supply reliability and planning construction cost of investment, distribution network transform projects combo is different
Power distribution network planning scheme.
2) collaboration optimization is established than modeling type, and the feasibility of power distribution network planning scheme is judged according to the model；
(power supply capacity, unit area construction investment, power supply are reliable for the technical-economic index according to needed for Electric Power Network Planning first
Property), establish collaboration optimization than modeling type, the model consider capacity-load ratio, load density, substation capacity, power supply area area,
The factors such as power factor, line nonlinear factor, load point average year idle time comprising the construction investment of unit powering area, supply
Electric energy power and land resources utilization comparison, reliability level etc., calculate each voltage needed for different power distribution network planning schemes
Grade transformer substation quantity, the number of lines and length.It includes that measures of effectiveness coefficient and constraint refer to that the collaboration, which optimizes than modeling type,
Mark；
As shown in Figure 1, the measures of effectiveness coefficient is as follows:
Wherein, XNPG indicates that measures of effectiveness coefficient, YS are the power supply capacity of unit land area, and ASAI is that power supply is reliable
Property, XS is the construction investment of unit area, KCIndicate capacity-load ratio, σ is load density, SbFor substation capacity, S is power supply area
Area, u are line nonlinear factor, and n indicates the number of lines, NBtIndicate certain voltage class substation quantity, ABtFor relevant voltage
The construction investment of grade transformer substation, LXtFor certain voltage class line length, AXtIndicate corresponding unit voltage grade line length L
Construction investment.
The binding target includes:
(1) using unit area construction investment XS as binding target, if being higher than cost of investment upper limit value, distribution network planning
Scheme is invalid；Wherein, the upper limit value is by planning year equal load density power supply area unit area Installed capital cost
Floating 20% chooses or is determined according to expert's resolution；
(2) using the power supply capacity YS of unit land area as binding target, if being lower than power supply capacity lower limit value, distribution
Net programme is invalid；The lower limit value is by planning year equal load density power supply area unit land area for electric energy
Power floats downward 20% selection or is resolved according to expert and determined；
(3) using power supply reliability ASAI as binding target, if being lower than power supply reliability lower limit value, distribution network planning side
Case is invalid；The lower limit value floats downward 5% selection or according to special by planning year equal load density power supply area power supply reliability
Family's resolution determines.
3) power distribution network planning scheme that step 2) determines multiple and different voltage class sequences respectively is repeated, with the voltage of acquisition
The maximum programme of measures of effectiveness coefficient XNPG is as final power distribution network planning scheme in rate sequence.
Specific example is given below:
In the range of 100 square kilometres of District power network planning area, take every square kilometre load density be 20 megawatts/
Square kilometre.According to the method for the present invention, 9 projects to be performed are formulated.Following table is distribution network planning transformation project, and base
Its promotion degree to influence factor is obtained in sensitivity method.
1 power distribution network of table project to be performed and its castering action to influence factor
Different power network planning schemes is formed according to different emphasis, project contained by each scheme is as shown in table 2.From table
It can be seen that the consideration of scheme 1 reduces planning construction cost of investment to the greatest extent；Scheme 2 is in the case where suitably increasing cost, emphasis
Increase the power supply capacity of planning region；Scheme 3 increases electric network reliability and power supply capacity using the means of newly-built substation；Side
Case 4 further increases its reliability by newly-built contact engineering on the basis of scheme 3；Scheme 5 creates cable run, and making can
By rate close to 99.99%；Scheme 6 also implements power distribution automation while newly-built substation, makes power supply reliability and power supply
Ability reaches the maximum value in 6 schemes.
Project table contained by 2 different schemes of table
In table 2, N expression does not select the project, and Y selects the project.
Compare the Performance Coefficient under different power network planning schemes.Consider that the calculating of the boundary condition of different schemes is kept not
Become.It is as shown in table 3 according to actual electric network planned project power supply area different schemes measures of effectiveness coefficient calculated result, accordingly
Variation tendency it is as shown in Figure 2.
3 different schemes measures of effectiveness coefficient of table calculates
It can be seen that in the case where power supply capacity and all minimum power supply reliability from the data of table 3, although construction investment
Cost can achieve the minimum value in six schemes, but measures of effectiveness coefficient is still within lowest order；When construction investment expense
When with, power supply capacity and power supply reliability value relatively mild in all schemes, measures of effectiveness coefficient can be only achieved maximum.
Claims (5)
1. a kind of power distribution network planning scheme evaluation method based on collaboration optimization Performance Coefficient, which is characterized in that including walking as follows
It is rapid:
1) factor for passing through Sensitivity Analysis Method analyzing influence power supply capacity and power supply reliability, formulates distribution network transform item
Mesh constructs the power distribution network planning scheme of different voltages rate sequence；
2) collaboration optimization is established than modeling type, and the feasibility of power distribution network planning scheme is judged according to the model；Including efficiency
Metewand and binding target；
3) power distribution network planning scheme that step 2) determines multiple and different voltage class sequences respectively is repeated, with the voltage class of acquisition
The maximum programme of measures of effectiveness coefficient XNPG is as final power distribution network planning scheme in sequence.
2. a kind of power distribution network planning scheme evaluation method based on collaboration optimization Performance Coefficient according to claim 1,
It is characterized in that, passes through the factor of Sensitivity Analysis Method analyzing influence power supply capacity and power supply reliability, packet described in step 1)
It includes:
(1) by Sensitivity Analysis Method analyzing influence power supply capacity because being known as:
(1.1) sensitivity coefficient of substation capacity, the sensitivity coefficient L of substation capacity are calculatedAIt indicates are as follows:
Wherein, YS is the power supply capacity of unit land area, and Δ YS is the variable quantity of the power supply capacity of unit land area, and A is
Substation's total capacity, Δ A are the variable quantities of substation capacity, and η is load factor,For power factor, S is power supply area face
Product；LA≥1；The sensitivity coefficient L of substation capacityAIt is higher, it is bigger to the castering action of power supply capacity；
(1.2) reactive compensation sensitivity coefficient, the sensitivity coefficient L of reactive compensation are calculatedQIt indicates are as follows:
Wherein, Q is reactive compensation capacity, and Δ Q is the variable quantity of reactive compensation capacity；The sensitivity coefficient L of reactive compensationQIt is higher,
It is bigger to the castering action of power supply capacity；
(2) by Sensitivity Analysis Method analyzing influence power supply reliability because being known as:
(2.1) the sensitivity coefficient L of power failure frequency is calculatedIFIt indicates are as follows:
Wherein, ASAI is power supply reliability, and Δ ASAI is the variable quantity of power supply reliability, and IF is power failure frequency, and Δ IF is to have a power failure
The variable quantity of frequency；The sensitivity coefficient L of power failure frequencyIFIt is higher, it is bigger to the influence of power supply reliability；
(2.2) the sensitivity coefficient L of power off time is calculatedtAre as follows:
Wherein, t is power off time, UiIndicate load point i average year idle time, NiImpacted number of users when for failure；Have a power failure
The sensitivity coefficient L of timetIt is higher, it is bigger to the influence of power supply reliability；
(2.3) the sensitivity coefficient L of scope of power outage is calculatedArAre as follows:
Wherein, Ar is scope of power outage；The sensitivity coefficient L of scope of power outageArIt is higher, it is bigger to the influence of power supply reliability.
3. a kind of power distribution network planning scheme evaluation method based on collaboration optimization Performance Coefficient according to claim 1,
It is characterized in that, formulation distribution network transform project described in step 1), building power distribution network planning scheme includes:
(1) distribution network transform project is formulated, comprising: newly-built substation project, distribution transforming capacity-increasing transformation engineering, substation increase with idle
Compensating project, substation implement power distribution automation engineering, substation and newly go out distribution line engineering, power transformation intersite line contact work
Journey, old line improvement project, distribution line extension line project and distribution line add segmentation engineering；
(2) according to power supply capacity, power supply reliability and planning construction cost of investment, match distribution network transform projects combo is different
Power network planning scheme.
4. a kind of power distribution network planning scheme evaluation method based on collaboration optimization Performance Coefficient according to claim 1,
It is characterized in that, measures of effectiveness coefficient described in step 2) is as follows:
Wherein, XNPG indicates that measures of effectiveness coefficient, YS are the power supply capacity of unit land area, and ASAI is power supply reliability, XS
For unit area construction investment, KCIndicate capacity-load ratio, σ is load density, SbFor substation capacity, S is power supply area area, and u is
Line nonlinear factor, n indicate the number of lines, NBtIndicate certain voltage class substation quantity, ABtFor relevant voltage grade transformer substation
Construction investment, LXtFor certain voltage class line length, AXtIndicate the construction investment of corresponding unit voltage grade line length L.
5. a kind of power distribution network planning scheme evaluation method based on collaboration optimization Performance Coefficient according to claim 1,
It is characterized in that, binding target described in step 2) includes:
(1) using unit area construction investment XS as binding target, if being higher than cost of investment upper limit value, power distribution network planning scheme
It is invalid；Wherein, the upper limit value floats by planning year equal load density power supply area unit area Installed capital cost
20% chooses or is determined according to expert's resolution；
(2) using the power supply capacity YS of unit land area as binding target, if being lower than power supply capacity lower limit value, distribution network planning
The scheme of drawing is invalid；The lower limit value is floated downward by the power supply capacity of planning year equal load density power supply area unit land area
20% chooses or is determined according to expert's resolution；
(3) using power supply reliability ASAI as binding target, if being lower than power supply reliability lower limit value, power distribution network planning scheme is not
It sets up；The lower limit value floats downward 5% selection by planning year equal load density power supply area power supply reliability or is determined according to expert
View determines.
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| CN115099602A (en) * | 2022-06-20 | 2022-09-23 | 国网天津市电力公司 | Power distribution network analysis method for full-voltage grade whole process |
| CN117371317A (en) * | 2023-10-11 | 2024-01-09 | 国网宁夏电力有限公司银川供电公司 | System stability evaluation method, medium and system for power distribution network access |
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