CN109816269A - A kind of power distribution network project planning method based on power distribution unit comprehensive benefit - Google Patents
A kind of power distribution network project planning method based on power distribution unit comprehensive benefit Download PDFInfo
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Abstract
The invention belongs to distribution network planning method and technology fields, are related to a kind of power distribution network project planning method based on power distribution unit comprehensive benefit.It is divided including power distribution unit, establish the evaluation system based on power distribution unit, the score value uniformly converted the status level of each index under hundred-mark system, construct fuzzy judgment matrix simultaneously assignment and each weight coefficient of calculating, the structure adjusting score and the several basic steps of sort method of set interval coefficient calculating power distribution unit, this method, which encloses distribution network management, is divided into several power distribution units, it is analyzed with Analysis of Policy Making evaluation system, from power distribution unit development level, two dimensions of power distribution unit input-output efficiency are set out the factor of analyzing influence investment decision, introduce the evaluation processing final to power distribution unit of structure adjusting coefficient, power distribution unit storage and increment can be taken into account, it changes over merely from the mode of economic benefit angle evaluation investment return, improve distribution network planning effect.
Description
Technical field
The invention belongs to distribution network planning method and technology field more particularly to a kind of matching based on power distribution unit comprehensive benefit
Power grid project planning method.
Background technique
Electric power is the important component of the energy, and with the continuous improvement of electrifing degree, electric power has become today's society
The basic guarantee of development and people's life, and power distribution network is directly facing terminal user, is the key link of electric system.
By the exploration and practice of many years, electric power enterprise studies the unit for summing up a set of maturation in terms of distribution network construction
Prepare Electric Power Network Planning system.But after distribution network construction fund is assigned, in face of the power distribution network investment largely put into, how really
Determine the investment tactics of power distribution network, how to solve the problems, such as that power distribution network encounters in terms of project planning, how to resist the wind of investment
Danger, the problem of how focusing on economic benefit while considering power distribution network investment social benefit, be electric power enterprise urgent need to resolve.
Under normal circumstances, the management unit of distribution network construction is provincial electric power company, and exploiting entity is power supply company, districts and cities.Conventional stream
Cheng Shi: provincial electric power company delimit the power distribution network total investment scale that saves, and the global investment demand feelings for considering junior's constituent parts and reporting
Condition carries out fund distribution；Power supply company, districts and cities arranges power distribution network investment plan according to the fund that provincial electric power company divides.It is conventional
Project planning there is following disadvantages:
1. lacking unified standard when fund Decision of Allocation, often according to regional status power distribution network scale and socio-economic development
Situation divides subordinate unit's scale of investment, it is difficult to meet regional distribution network construction actual demand, be easy to cause ground section distribution
Net construction level gap is increasing.
2. power supply company, junior lacks scientific and effective project demands analysis method, the important journey of disparity items can not be quantified
Degree, it is difficult to propose the order of priority of power distribution network net construction.
3. power supply company, base lacks comprehensive power distribution network Cost/Benefit Analysis, it is difficult to the analysis of system, quantization project
Invest comprehensive benefit.
Summary of the invention
Power supply enterprise's power distribution network compass of competency is divided into several power distribution units by the present invention, will be within the scope of net unit
Construction project is integrally packaged, and be research with power distribution unit is object building power distribution network Investment appraisal system, and based on this is
System proposes a kind of power distribution network project planning method based on power distribution unit comprehensive benefit, and this method can be to all kinds of distribution plannings
The comprehensive benefit of project is associated analysis and is quickly handled after forming quantized values, can scientific and effective be distribution
The data analysis work of net project planning, the complexity such as performance evaluation provides reference data.
To achieve the above object, the invention adopts the following technical scheme that.
A kind of power distribution network project planning method based on power distribution unit comprehensive benefit, includes the following steps:
Step 1: completing the division of power distribution unit；Including A1~A3；
A1. power distribution network compass of competency is divided into several power distribution units, refers to and is planned to power distribution network distribution subregion
Basis, to be qualifications not across regulatory control boundary, divide power distribution unit one by one not across municipal subregion；
A2. according to each power distribution unit practical situation delimit power distribution unit attribute, power distribution unit attribute include donor site classification with
And donor site positioning；
A3. the project in distribution network planning project library is sorted out according to power distribution unit, will belongs to same with distribution
The project of unit is bundled to power distribution unit；
Step 2: establishing the evaluation system based on power distribution unit；Evaluation system includes development level index group and investment
Output index group, including B1~B2:
B1. development level index group includes at least route and is averaged power supply number index, line standard wiring accounting index, line
Road N-1 percent of pass index, route heavy duty index, overhead transmission line insulation rate index, old routing indicator, line sectionalizing are reasonable
Rate index, line length transfinite index, circuit section standardized rate index, route equilibrium operation degree index, load development saturation
Degree index can open capacity accounting index, user's access Discussing Convenience index；
B2. input-output evaluation of urban index group includes at least skill upgrading index, constructive direction index, economic benefits indicator；
Step 3: different target values is set to power distribution unit according to power supply zone or functional localization, according to development level
The current value of indices and target value gap in index group are converted the index unification of different dimensions by method for normalizing
For specific value, the score value under hundred-mark system is uniformly converted by the status level of each index in development level index group；Specific packet
Include C1~C2:
C1. according to index meaning, the indices in power distribution unit development level index group are subjected to attributive classification, attribute
It is divided into positive Criterion Attribute and reverse Criterion Attribute, positive ATTRIBUTE INDEX y refers to the index value, and the higher the better, ideal value 1；
Reverse ATTRIBUTE INDEX is then that the lower value the better, ideal value 0, and for different Criterion Attributes, index scores calculation formula such as
Under:
Positive index:Reverse index:
In formula: x is evaluation index current value, and y is evaluation index score；For positive or reverse index, a is index lower limit；B is to refer to
Put on line, i.e. target value；
C2. according to index meaning, the difference ratio of input-output evaluation of urban index group indices is calculated, difference ratio is to throw
Input-output evaluation of urban index group indices improvement degree, which accounts for the index, after money is implemented can improve the percentage in space；
Positive index calculating method: when concrete property index is positive index, the index ideal value in each region is 100,
If n1And n2With index value after implementation before respectively implementing, then normalization coefficient is 1/ (100-n1), the practical improved values of index with
The variation of index value is related, then the calculation formula of concrete property target improvement effectiveness indicator value y sees below formula:
Reverse index calculating method: when concrete property index is reverse index, index ideal value is 0, if n1And n2Point
With index value after implementation before Wei not implementing, then normalization coefficient is 1/n1, can similarly obtain concrete property target improvement effectiveness indicator
The calculation formula of value y sees below formula:
Step 4: building fuzzy judgment matrix and assignment；And the weight coefficient of indices in each index group is calculated separately,
Specifically include D1~D2；
D1. building indices weight builds fuzzy judgment matrix and assignment；
D2. geometric average method ask weight, in particular to, based on aforementioned fuzzy judgment matrix and its assignment, count respectively
The index geometric mean for calculating power distribution unit development level domestic demand and external demand even multiplies simultaneously evolution by each element is about to, that is, acquires each
The geometrical mean of row element obtains the weight coefficient of indices after being normalized；
Step 5: set interval coefficient, after the structure adjusting score, in particular to the weight setting that calculate power distribution unit, if
Determine Interval, calculate the structure adjusting score of power distribution unit, adjustment score calculates function are as follows:
yi=(k1i×ai+k2i×bi)/2；
In formula: aiFor i-th of power distribution unit power distribution network development level evaluation score；k1iFor i-th of power distribution unit power distribution network
Development level evaluates regulation coefficient, is excitation factor when being greater than 1, otherwise is healthy ingredient；biFor i-th of power distribution unit distribution
Net input-output evaluation of urban score；k2iFor i-th of power distribution unit power distribution network input-output evaluation of urban regulation coefficient, motivated when being greater than 1
The factor, on the contrary it is healthy ingredient；Development level evaluation points are as follows:The input-output evaluation of urban factor are as follows:
Step 6: calculating separately each power distribution unit respectively in accordance with three~step 5 of above-mentioned steps to different planning area schemes
Structure adjusting score carries out sort method to every programme structure adjusting score calculated, suitable according to from high to low
Sequence judges the priority of each programme, and the score the high then to indicate there is higher comprehensive benefit.
In above-mentioned steps, specifically, in A1 step: for no regulatory control region, being drawn by main distribution source point distribution range
Distribute electric unit；Each power distribution unit should have at least two main distribution source, include 1~3 group of 10 kilovolts of typical wiring, otherwise will
Similar or direct neighbor the distribution region containing minimum main distribution source is merged as new power distribution unit processing；Subregion
Plot adjacent by several, that Exploitation degree is close, distribution reliability requirement is almost the same forms.
In above-mentioned steps, specifically, in B1 step:
Average power supply number refers to the ratio of the sum and route sum of route interior power, wherein there are an interconnections to come from
Different substation is an additional power supply point, calculation formula:
Standard wiring accounting refers to that the route using the standard mode of connection accounts for the ratio of total line, calculation formula:
Route N-1 percent of pass refers to that route meets the ratio of N-1 verification, and route meets N-1 verification and refers to the route in event
When hindering or planning out of service, remaining route normal power supply is not influenced；Calculation formula:
Route heavy duty rate refers to that the ratio of heavy-haul line sum Yu route sum, heavy-haul line refer to that maximum load rate is greater than
80% routine calculation formula:
Overhead transmission line insulation rate refers to that overhead transmission line insulated circuit length accounts for power distribution unit overhead transmission line in power distribution unit
The ratio of total length, calculation formula:
The old ratio of route refers to that old line length in power distribution unit accounts for the ratio of power distribution unit total line length, wherein
Old route refers to route of the operation time limit at 20 years or more, calculation formula:
Circuit section specification rate refers to that the line length in power distribution unit using standard section accounts for the ratio of total line length
Example, calculation formula:
The line length ratio of transfiniting refers to the ratio of radius of electricity supply overproof route number and route sum, the confession of route
Electric radius refers to the line length from substation low-voltage side outlet to the farthest load point of its power supply, calculation formula:
The reasonable rate of line sectionalizing refers to that single time basic routing line is divided into 3~5 sections, and every section of volume controlled is in 1600~3300kVA
Route number the line is busy road sum ratio, calculation formula:
Route equilibrium operation degree refers to the route equilibrium operation in power distribution unit, the route that operational efficiency is met the requirements of the standard
The ratio of number the line is busy road sum, calculation formula:
Wherein:EERiFor in power distribution unit one by one
The load factor of route；
Load develops the ratio that saturation degree refers to expected load in the current load of power distribution unit and planning, calculation formula:
Capacity accounting can be opened and refer to that the limitation of route N-1 condition is descended in power distribution unit to open appearance in consideration power distribution unit
Amount accounts for the ratio of the unit total capability for load, calculation formula:
User accesses Discussing Convenience and refers in power distribution unit in the total length of all public affairs lines and region effectively the ratio between powering area；
Calculation formula:
In above-mentioned steps, specifically, in D1 step, fuzzy judgment matrix is constructed using 1~9 scale meaning table；Its
In:
1 the former i and the latter j has property of equal importance；
3 the former i are slightly more important than the latter j；
5 the former i are obviously more important than the latter j；
7 the former i are strongly more important than the latter j；
9 the former i are more extremely important than the latter j；
2, the corresponding scale value of intermediate state of 4,6, the 8 above-mentioned judgements of expression；If the inverse element i of the above numerical value and member
The ratio between importance of plain j is aij；Then the ratio between importance of element j and element i is aji=1/aij。
In above-mentioned steps, specifically, in D2 step, indices weight is
In above-mentioned steps, specifically, D2 step, in particular to, for each index group, calculate separately a distribution list in group
The geometric mean W of first indicesi、QiIf m rank judges that square isEven multiply by each element is about to
And open the geometrical mean that m power acquires each row element:Again bi(i=1,2,
3 ..., m) normalization, acquires index xjWeight coefficient:
In above-mentioned steps, specifically, the route of route N-1 percent of pass meaning, further includes the segmentation of overhead transmission line, electricity
One ring network power distribution unit and one section of long cable section of ingoing line ontology on cable road.
The beneficial effect is that:
Power distribution network compass of competency is divided into several power distribution units by the present invention, will be with the construction project within the scope of net unit
It is whole to be packaged.With power distribution unit be research be object building power distribution network investment decision analysis and evaluation system score, this method
From power distribution unit development level, the two dimension analyzing influence investment decisions of power distribution unit input-output efficiency it is main because
Number builds index system, formulates index standards of grading, carries out index weights setting, introduces structure adjusting coefficient to power distribution unit
Final evaluation score is calculated, and is ranked up according to each power distribution unit final score, can not only be taken into account power distribution unit and be deposited
Amount and increment, and power distribution network input and output efficiency during power distribution unit status power network development level and evaluation, quantization can be planned as a whole
The critical urgent degree of domestic demand and external demand is changed over merely from the mode of economic benefit angle evaluation investment return, but skill
Many-sided association evaluation and test such as art promotion, constructive direction, economic benefit, had both paid close attention to absolute " achievement " and " effect " of power network development,
Opposite " benefit " and " efficiency " for paying close attention to electric grid investment again, realizes the distribution network planning method to tradition based on output
It improves and is promoted.
Detailed description of the invention
Fig. 1 is the composition schematic diagram of system in the power distribution network project planning method based on power distribution unit comprehensive benefit.
Specific embodiment
It elaborates below in conjunction with specific embodiment to the invention.
The present invention defines several power distribution units according to power supply system power distribution network compass of competency, each power distribution unit is based on, to match
Electric unit is that research is object building power distribution network decision support system, which throws from power distribution unit development level, power distribution unit
Enter two dimensions of output benefit to set out, the weight of influence factor is defined and is calculated, while introducing regulation coefficient to matching
The final evaluation coefficient of electric unit is calculated, and is ranked up according to each power distribution unit evaluation coefficient, the ranking results with respectively match
The electric grid investment social benefit and economic benefit of electric unit match, and electric system arranges distribution according to this ranking results
Net investment plan.Based on the above principles, the power distribution network project planning method of the invention based on power distribution unit comprehensive benefit guarantees
The standard of fund Decision of Allocation is unified, while meeting regional distribution network construction actual demand, guarantees that section power distribution network is built
If horizontal science plan, at the same it is scientific and effective each distribution project demands are effectively analyzed, by the important journey of projects
Degree carries out quantum chemical method, realizes that the priority analysis of power distribution network net construction, this method can analyze power distribution network investment effect comprehensively
Benefit improves the comprehensive benefit of project investment.Specific step is as follows:
Step 1: completing the division of power distribution unit；
1. power supply enterprise, districts and cities power distribution network compass of competency is divided into several power distribution units, the principle of dividing elements is such as
Under: it specifically refers to:
Based on the planning of power distribution network power supply zone, to be to limit item not across regulatory control boundary not across municipal subregion
Part divides power distribution unit one by one；Wherein: for no regulatory control region, dividing power supply unit by main power supply point supply district；Respectively
Power supply unit should have at least two main power supply, include 1~3 group of 10 kilovolts of typical wiring, otherwise by similar or direct phase
The adjacent power supply area containing minimum main power supply is merged as new power supply unit processing；The subregion is by several
It is adjacent, Exploitation degree is close, power supply reliability requires almost the same plot to form.
2. assigning each power distribution unit cell attribute, cell attribute includes donor site classification (A~D), donor site positioning, classification knot
Fruit reflects the significance level of power distribution unit itself, is to influence the whether inclined most intuitive factor of Investment Allocation.
3. the project in distribution network planning project library is sorted out according to power distribution unit, the same project with unit is beaten
Wrap power distribution unit.
Step 2: establishing the evaluation system based on power distribution unit；
Power distribution unit storage and increment are taken into account, considers distribution during power distribution unit status power network development level and evaluation as a whole
Net input and output efficiency, evaluation system include development level index group and input and output index group；Wherein:
1. development level index group quantifies the demand degree of domestic demand and external demand primarily directed to power distribution unit status；It is specific and
Speech:
As shown in table 1, development level index group includes at least route and is averaged power supply number index, line standard wiring accounting
Index, route N-1 percent of pass index, route heavy duty index, overhead transmission line insulation rate index, old routing indicator, route
It is segmented reasonable rate index, line length transfinites index, circuit section standardized rate index, route equilibrium operation degree index, load
Develop saturation degree index, capacity accounting index, user's access Discussing Convenience index can be opened；
The specific evaluation index group of 1 power distribution unit development level of table
Wherein, indices are defined as follows:
(1) average power supply number: every time 10kV line power point in unit is counted, there are an interconnections to come from
It is an additional power supply point that different substation, which is calculated,.On the one hand the index reflects each distribution under higher level's power supply point fault condition
The load transfer ability of unit, on the other hand then embodies power distribution unit to the satisfaction of dual power supply requirement, calculation formula:
(2) standard wiring accounting: the mode of connection recommended using directive/guide, while meeting block supply reliability requirement,
Simplify route contact information.The metrics evaluation emphasis embodies in unit the reasonability of grid structure and to unit power supply reliability
Supporting degree, calculation formula:
(3) route N-1 percent of pass: route meets N-1 verification and refers to when a segmentation in route, including overhead transmission line
Segmentation, the ring-main unit or one section of long cable section of ingoing line ontology of cable run) failure or plan it is out of service when, do not influence
Remaining route normal power supply.The Supply Security of metrics evaluation distribution line under the conditions of single failure, high spot reviews route
Turn for ability；Calculation formula:
(4) route heavy duty rate: heavy-haul line refers to the route that maximum load rate is greater than 80%.Line load rate is reflection single
The index of line powering ability and power supply nargin；Calculation formula:
(5) overhead transmission line insulation rate: overhead transmission line insulated circuit length accounts for unit overhead transmission line total length in unit
Ratio.Distribution Network Failure rate can be effectively reduced by promoting overhead transmission line insulation rate, improve equipment operational reliability；Calculation formula:
(6) the old ratio of route: old line length accounts for the ratio of unit line total length in unit, and old route refers to fortune
The row time limit was at 20 years or more；Calculation formula:
(7) 10kV total line length circuit section specification rate: is accounted for using the 10kV line length of standard section in unit
Ratio, the selection in 10kV line conductor section should meet the requirement of Q/GDW10370-2016 " distribution network technology directive/guide ".
Calculation formula:
(8) line length transfinites ratio: length, which transfinites, refers to that 10kV radius of electricity supply is more than directive/guide requirement.The confession of 10kV route
Electric radius refers to the line length from substation low-voltage side outlet to the farthest load point of its power supply.Line powering is apart from length
Power supply quality is had a major impact, under the conditions of same conductor cross-section, then end pressure drop is big for half path length of line powering, corresponding line
Damage is general also larger, otherwise end pressure drop is small, and line loss is also smaller；Calculation formula:
(9) the reasonable rate of line sectionalizing: line sectionalizing rationally refers to that single time basic routing line is divided into 3~5 sections, every section of capacity control
System can promote scheduling flexibility ratio in 1600~3300kVA, reasonable segmentation, and amount when reducing fault outage influence improves power supply
Reliability；Calculation formula:
(10) route equilibrium operation degree: index interpretation: the 10kV for the reasonable utilization for realizing power network resources, in same unit
Route answers equilibrium operation, and too big difference should not occur in operational efficiency.Analysis to 10kV route operational efficiency balance degree
The problem of being able to reflect planning construction and management and running aspect, calculation formula:
Wherein:EERiFor the load factor of route one by one in unit.
(11) load develops saturation degree: it is to show the index of unit load development degree that load, which develops saturation degree, load hair
Exhibition saturation degree is calculated using existing load development degree with recent load development degree ratio；Calculation formula:
(12) capacity accounting can be opened: fully considering that route N-1 condition limits in power distribution unit, it is available in computing unit
Nargin can open capacity situation；Whether the index can be directly accessed the judgment basis of power grid as Business Process System, on the one hand
It can reflect the power supply capacity of the status of power distribution unit, on the other hand then can be according to load growth and Business Process System situation, dynamic point
It analyses existing rack, the adaptability that route develops load, reflects power supply capacity corresponding to power distribution unit status rack to future
The degree of support of load development, calculation formula:
(13) user accesses Discussing Convenience: the convenience degree that reflection power distribution unit accesses user.Due to the access half of user
Diameter is not easy to count, and large number of, this index definition uses the calculation of similar " city road network density ", i.e. zoning
The ratio between effective powering area in the total length of interior all public lines and region；Calculation formula:
In conjunction with power distribution network practical operation situation and Guidelines requirement, under different power supply zones or different function positioning
Unit sets different target values, according to Index Current situation value and target value gap, by method for normalizing by the finger of different dimensions
Mark is uniformly converted into specific score value, the scoring uniformly converted each Index Current situation level under hundred-mark system；
As shown in table 2, firstly, according to index meaning, power distribution unit development level specific targets is subjected to attributive classification, are belonged to
Property is divided into positive Criterion Attribute and reverse Criterion Attribute, and positive ATTRIBUTE INDEX y refers to the index value, and the higher the better, and ideal value is
1；Reverse ATTRIBUTE INDEX is then that the lower value the better, ideal value 0.For different Criterion Attributes, index scoring calculation formula
It is as follows:
Positive index:
Reverse index:
In formula: x is evaluation index current value, and y is evaluation index score；For positive or reverse index, a is under index
Limit, when " being lower than " value, are scored at 0；B is that index is online, i.e. target value, is got full marks when reaching at or above the index.
Each power supply area evaluation index of table 2 refers to coefficient table
2. input-output evaluation of urban index group, for change in the past merely from the disadvantage of economic benefit angle evaluation investment return
End, the present invention is evaluated from three skill upgrading index, constructive direction index, economic benefits indicator indexs, to realize distribution
The useful supplement of net evaluation system and improvement, Project Technical effectiveness indicator specifically indicate that project whether to index promotion have effect,
Constructive direction index then show project whether according to target blueprint construction, economic benefits indicator show whether project has one
Fixed cost performance.
The present invention is expressed distribution network planning using difference ratio calculation method and executed to each unit concrete property index
Improvement is reflected by the variation of two power grid indexs before being invested and after the completion of investment, in order to make difference ratio
Not only investment implementation result can be objectively responded, but also unified dimension and standard can be formed between different indexs, difference
Ratio unified definition is that operational effect class target improvement degree accounts for the index and can improve the percentage in space after investment is implemented.
According to this principle, the calculation method of difference ratio is first with two electricity after the completion of investment and before being invested
Net index seeks difference, multiplied by it with corresponding normalization coefficient.The conduct reciprocal of the current value of service index and ideal value difference
The normalization coefficient of difference ratio.The calculation method of the difference of concrete property pointer type, difference ratio is also different.When specific
When characteristic index is positive index, if concrete property index value becomes larger after planning executes, then it represents that index makes moderate progress, poor
Volume rate value executes front and back concrete property index value in combination with planning and is calculated with ideal value；
If concrete property index becomes smaller after planning executes, then it represents that index is not improved, then difference rate value is
0.When concrete property index is reverse index, if concrete property index value becomes smaller after planning executes, then it represents that index is
Improve, difference rate value executes front and back concrete property index value in combination with planning and is calculated with ideal value；If planning executes
Concrete property index becomes larger afterwards, then it represents that index is not improved, then difference rate value is 0.In concrete property index is
Between index when, if planning execute after concrete property index value closer to ideal value, then it represents that index is improved, difference ratio
Rate value executes front and back concrete property index value in combination with planning and is calculated with ideal value；If concrete property refers to after planning executes
Scale value and ideal value gap are bigger, then it represents that index is not improved, and difference rate value is 0.Circular is as follows.
Positive index calculating method: when concrete property index is positive index, the index ideal value in each region is 100,
If n1And n2Respectively implement before and implement after index value, then normalization coefficient be 1/ (100-n1), the practical improved values of index with
The variation of index value is related, then the calculation formula of concrete property target improvement effectiveness indicator value y sees below formula:
Reverse index calculating method: when concrete property index is reverse index, index ideal value is 0, if n1And n2Respectively
To implement index value after preceding and implementation, then normalization coefficient is 1/n1, can similarly obtain concrete property target improvement effectiveness indicator value
The calculation formula of y sees below formula:
(2) constructive direction index
Constructive direction belongs to positive index, and ideal value is 100% regardless of power supply zone.According to its computation model, building
Corresponding standards of gradingIn formula: xopMeet target net direction for route is created or be transformed in unit
Length；xnewIt creates as total line length is created or be transformed in unit.
(3) economic benefits indicator
Since grid benefit value variation range is larger, theoretically belongs to positive index, be the bigger the better, but is specific much best
There is no boundary.For this purpose, similarly judging dimension with other specific evaluation indexes to have the value, its index value is converted
For the score between 0~1, corresponding standards of grading are constructedX in formulaiFor the power grid of unit one by one
Ratio of cost and benefit；xmaxCompare maximum value for all unit grid benefit costs.
Step 7: index weights are arranged；Power distribution unit development level index weights；As shown in table 3, power distribution unit developing water
Flat index weights are using 1~9 scale meaning table building fuzzy judgment matrix and assignment.
3 importance scale meaning table of table
As shown in 4~table of table 5, index weights specifically calculate that steps are as follows:
(1) fuzzy judgment matrix is constructed；Choosing comprehensively terms and conditions provides the index Fuzzy judgement of domestic demand and external demand respectively
Matrix.
4 power distribution unit development level fuzzy judgment matrix (domestic demand) of table
5 power distribution unit development level fuzzy judgment matrix (external demand) of table
| Index | Load develops saturation degree | Capacity accounting can be opened | User accesses Discussing Convenience |
| Load develops saturation degree | 1.00 | 1.00 | 2.00 |
| Capacity accounting can be opened | 1.00 | 1.00 | 2.00 |
| User accesses Discussing Convenience | 0.50 | 0.50 | 1.00 |
(2) geometric average method seeks weight
Calculate separately the index geometric mean W of power distribution unit development level domestic demand and external demandi、QiIf m rank judges that square is First by be about to each element even multiply and open m power, that is, acquire the geometrical mean of each row element:
Again bi(i=1,2,3 ..., m) normalization, that is, acquire index xj
Weight coefficient:
Specifically, with " distribution network construction be transformed action plan (2015~2010 years) " for standard, with ordinarily resident and
For industrial power distribution network ordinarily resident and industrial standard distribution network line, value calculates as follows:
Similarly and so on calculate W2
~W10And Q1~Q3Each matrix is normalized in numerical value, finds out each index weights It is other and so on to calculate W2~W10And Q1~Q3Numerical value, as a result as shown in table 67:
6 power distribution unit development level specific targets weighted value calculated result of table
2. power distribution unit input-output efficiency index weights；
It is the same with power distribution unit development level index weights setting method, fuzzy Judgment is constructed using 1~9 scale meaning table
Matrix and assignment, obtained fuzzy judgment matrix are as shown in table 7:
7 input-output efficiency fuzzy judgment matrix of table
| Index | Skill upgrading | Constructive direction | Grid benefit |
| Skill upgrading | 1 | 3 | 1 |
| Constructive direction | 1/3 | 1 | 1/3 |
| Grid benefit | 1 | 3 | 1 |
With " action plan (2015~2010 years) are transformed in distribution network construction " for standard, ordinarily resident and industry are marked
Quasi- power distribution network, the weighted value of every specific targets is obtained by calculation: it is 0.43 that electric power network technique, which promotes weight, constructive direction power
Weight is 0.14, and grid benefit weight is 0.43.
Step 8: coefficient of colligation adjusts
According to the investment decision analysis and evaluation system based on power distribution unit, after selecting index, standards of grading, weight setting,
Power distribution unit can be carried out to the scoring of two dimensions of power distribution unit development level and power distribution unit input-output efficiency, two dimensions
Spending full marks is respectively 100 points.On the basis of grading to the evaluation of distribution network element development level and input-output efficiency, using distribution
The net propensity to investment introduces motivation hygiene theory, passes through setting in the principle of " development level index is weak, and input and output index is strong "
Interval calculates the structure adjusting score of power distribution unit, and function is as follows:
yi=(k1i×ai+k2i×bi)/2
In formula: aiFor i-th of power distribution unit power distribution network development level evaluation score；k1iFor i-th of power distribution unit power distribution network
Development level evaluates regulation coefficient, is excitation factor when being greater than 1, otherwise is healthy ingredient；biFor i-th of power distribution unit distribution
Net input-output evaluation of urban score；k2iFor i-th of power distribution unit power distribution network input-output evaluation of urban regulation coefficient, motivated when being greater than 1
The factor, on the contrary it is healthy ingredient.
Evaluation points calculate as follows: development level evaluation points are as follows:The input-output evaluation of urban factor are as follows:
By above step, the scoring that electric power enterprise can quantify the power distribution unit in compass of competency is being invested
When arrangement the arrangement that Quantitative marking carries out each unit investment project can be carried out according to each power distribution unit.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the invention, rather than to this hair
It is bright create protection scope limitation, although being explained in detail referring to preferred embodiment to the invention, this field it is general
Lead to it will be appreciated by the skilled person that can be modified or replaced equivalently to the technical solution of the invention, without departing from this
The spirit and scope of innovation and creation technical solution.
Claims (7)
1. a kind of power distribution network project planning method based on power distribution unit comprehensive benefit, which comprises the steps of:
Step 1: completing the division of power distribution unit；Including A1~A3:
A1. power distribution network compass of competency is divided into several power distribution units, referred to based on the planning of power distribution network distribution subregion,
To be qualifications not across regulatory control boundary, divide power distribution unit one by one not across municipal subregion；
A2. power distribution unit attribute delimited according to each power distribution unit practical situation, power distribution unit attribute includes donor site classification and supplies
Area's positioning；
A3. the project in distribution network planning project library is sorted out according to power distribution unit, will belongs to same with power distribution unit
Project be bundled to power distribution unit；
Step 2: establishing the evaluation system based on power distribution unit；The evaluation system includes development level index group and investment
Output index group；Wherein: B1~B2:
B1. development level index group includes at least route and is averaged power supply number index, line standard wiring accounting index, route N-1
Percent of pass index, route heavy duty index, overhead transmission line insulation rate index, old routing indicator, the reasonable rate index of line sectionalizing,
Line length transfinite index, circuit section standardized rate index, route equilibrium operation degree index, load develop saturation degree index,
Capacity accounting index can be opened, user accesses Discussing Convenience index；
B2. input-output evaluation of urban index group includes at least skill upgrading index, constructive direction index, economic benefits indicator；
Step 3: different target values is set to power distribution unit according to power supply zone or functional localization, according to development level index
The current value and target value gap of indices, are uniformly converted the index of different dimensions to specifically by method for normalizing in group
The status level of each index in development level index group is uniformly converted the score value under hundred-mark system by numerical value；Specifically include C1~
C2:
C1. according to index meaning, the indices in power distribution unit development level index group are subjected to attributive classification, attribute is divided into
Positive Criterion Attribute and reverse Criterion Attribute, positive ATTRIBUTE INDEX y refers to the index value, and the higher the better, ideal value 1；It is reverse to belong to
Property index be then that the lower value the better, ideal value 0, for different Criterion Attributes, index score calculation formula it is as follows:
Positive index:Reverse index:
In formula: x is evaluation index current value, and y is evaluation index score；For positive or reverse index, a is index lower limit；B is
Index is online, i.e. target value；
C2. according to index meaning, the difference ratio of input-output evaluation of urban index group indices is calculated, difference ratio is that investment is real
The percentage in space can be improved by applying rear input-output evaluation of urban index group indices and improving degree and account for the index；
Positive index calculating method: when concrete property index is positive index, the index ideal value in each region is 100, if n1With
n2With index value after implementation before respectively implementing, then normalization coefficient is 1/ (100-n1), the practical improved values of index and index value
Variation it is related, then the calculation formula of concrete property target improvement effectiveness indicator value y sees below formula:
Reverse index calculating method: when concrete property index is reverse index, index ideal value is 0, if n1And n2It is respectively real
With index value after implementation before applying, then normalization coefficient is 1/n1, can similarly obtain the meter of concrete property target improvement effectiveness indicator value y
It calculates formula and sees below formula:
Step 4: building fuzzy judgment matrix and assignment；And the weight coefficient of indices in each index group is calculated separately, specifically
Including D1~D2:
D1. building indices weight builds fuzzy judgment matrix and assignment；
D2. geometric average method ask weight, in particular to, based on aforementioned fuzzy judgment matrix and its assignment, calculate separately and match
The index geometric mean of electric unit development level domestic demand and external demand even multiplies simultaneously evolution by each element is about to, that is, acquires each row member
The geometrical mean of element obtains the weight coefficient of indices after being normalized；
Step 5: set interval coefficient sets area after the structure adjusting score, in particular to the weight setting that calculate power distribution unit
Between coefficient, calculate the structure adjusting score of power distribution unit, adjustment score calculates function are as follows:
yi=(k1i×ai+k2i×bi)/2；
In formula: aiFor i-th of power distribution unit power distribution network development level evaluation score；k1iDevelop for i-th of power distribution unit power distribution network
Assessment of levels regulation coefficient is excitation factor when being greater than 1, otherwise is healthy ingredient；biIt is put into for i-th of power distribution unit power distribution network
Output evaluation score；k2iIt is excitation factor when being greater than 1, instead for i-th of power distribution unit power distribution network input-output evaluation of urban regulation coefficient
Be healthy ingredient；Development level evaluation points are as follows:The input-output evaluation of urban factor are as follows:
Step 6: different planning area schemes are calculated separately with the synthesis of each power distribution unit respectively in accordance with three~step 5 of above-mentioned steps
Score is adjusted, sort method is carried out to every programme structure adjusting score calculated, is sentenced according to sequence from high to low
The priority for each programme of breaking, the score the high then to indicate there is higher comprehensive benefit.
2. a kind of power distribution network project planning method based on power distribution unit comprehensive benefit, feature exist according to claim 1
In in the A1 step: for no regulatory control region, dividing power distribution unit by main distribution source point distribution range；Each power distribution unit is answered
Have at least two main distribution source, include 1~3 group of 10 kilovolts of typical wiring, otherwise by similar or direct neighbor containing minimum
The distribution region in main distribution source is merged as new power distribution unit processing；The subregion is adjacent by several, develops journey
Spend plot composition close, that distribution reliability requirement is almost the same.
3. a kind of power distribution network project planning method based on power distribution unit comprehensive benefit, feature exist according to claim 1
In in the B1 step:
Average power supply number refers to the ratio of the sum and route sum of route interior power, wherein there are an interconnections from difference
Substation is an additional power supply point, calculation formula:
Standard wiring accounting refers to that the route using the standard mode of connection accounts for the ratio of total line, calculation formula:
Route N-1 percent of pass refers to that route meets the ratio of N-1 verification, route meet N-1 verification refer to the route in failure or
When planning out of service, remaining route normal power supply is not influenced；Calculation formula:
Route heavy duty rate refers to that the ratio of heavy-haul line sum Yu route sum, heavy-haul line refer to that maximum load rate is greater than 80%
Routine calculation formula:
Overhead transmission line insulation rate refers to that overhead transmission line insulated circuit length accounts for power distribution unit overhead transmission line overall length in power distribution unit
The ratio of degree, calculation formula:
The old ratio of route refers to that old line length in power distribution unit accounts for the ratio of power distribution unit total line length, wherein old
Route refers to route of the operation time limit at 20 years or more, calculation formula:
Circuit section specification rate refers to that the line length in power distribution unit using standard section accounts for the ratio of total line length, meter
Calculate formula:
The line length ratio of transfiniting refers to the ratio of radius of electricity supply overproof route number and route sum, the power supply half of route
Diameter refers to the line length from substation low-voltage side outlet to the farthest load point of its power supply, calculation formula:
The reasonable rate of line sectionalizing refers to that single time basic routing line is divided into 3~5 sections, line of the every section of volume controlled in 1600~3300kVA
The ratio of number the line is busy road sum, calculation formula:
Route equilibrium operation degree refers to that the route equilibrium operation in power distribution unit, the route number that operational efficiency is met the requirements of the standard account for
The ratio of route sum, calculation formula:
Wherein:EERiFor the load factor of route one by one in power distribution unit；
Load develops the ratio that saturation degree refers to expected load in the current load of power distribution unit and planning, calculation formula:
Capacity accounting can be opened and refer to that the capacity that opens for considering that route N-1 condition limits in lower power distribution unit in power distribution unit accounts for
The ratio of the unit total capability for load, calculation formula:
User accesses Discussing Convenience and refers in power distribution unit in the total length of all public affairs lines and region effectively the ratio between powering area；It calculates
Formula:
4. a kind of power distribution network project planning method based on power distribution unit comprehensive benefit, feature exist according to claim 1
In in the D1 step, using 1~9 scale meaning table building fuzzy judgment matrix；Wherein:
1 the former i and the latter j has property of equal importance
3 the former i are slightly more important than the latter j
5 the former i are obviously more important than the latter j
7 the former i are strongly more important than the latter j
9 the former i are more extremely important than the latter j
2, the corresponding scale value of intermediate state of 4,6, the 8 above-mentioned judgements of expression；
The inverse of the above numerical value, if the ratio between importance of element i and element j is aij；Then the ratio between the importance of element j and element i
For aji=1/aij。
5. a kind of power distribution network project planning method based on power distribution unit comprehensive benefit, feature exist according to claim 1
In, in the D2 step, indices weight are as follows:
6. a kind of power distribution network project planning method based on power distribution unit comprehensive benefit, feature exist according to claim 1
In,
The D2 step, in particular to, for each index group, calculate separately a geometric mean for power distribution unit indices in group
Wi、QiIf m rank judges that square isEven multiply by each element is about to and open m power and acquire each row element
Geometrical mean:Again bi(i=1,2,3 ..., m) normalization, acquires index xj
Weight coefficient:
7. a kind of power distribution network project planning method based on power distribution unit comprehensive benefit, feature exist according to claim 1
In the route of the route N-1 percent of pass meaning further includes the segmentation of overhead transmission line, a looped network distribution list of cable run
Member and one section of long cable section of ingoing line ontology.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106503919A (en) * | 2016-11-03 | 2017-03-15 | 国家电网公司 | A kind of power distribution network evaluation methodology based on power supply zone characteristic |
| CN109359837A (en) * | 2018-09-29 | 2019-02-19 | 国网四川省电力公司经济技术研究院 | A kind of assessment of active distribution network technical economic benefit and investment decision method |
-
2019
- 2019-02-20 CN CN201910124936.8A patent/CN109816269B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106503919A (en) * | 2016-11-03 | 2017-03-15 | 国家电网公司 | A kind of power distribution network evaluation methodology based on power supply zone characteristic |
| CN109359837A (en) * | 2018-09-29 | 2019-02-19 | 国网四川省电力公司经济技术研究院 | A kind of assessment of active distribution network technical economic benefit and investment decision method |
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