CN108428045A - A kind of distribution network operation health state evaluation method - Google Patents
A kind of distribution network operation health state evaluation method Download PDFInfo
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Abstract
The invention discloses a kind of distribution network operation health state evaluation methods, including：Choose index needed for distribution network operation health state evaluation；Establish the standards of grading calculated for index for selection, and it is the corresponding pointer type of setup measures to be scored according to each index of calculating, in conjunction with standards of grading setting and corresponding pointer type, builds distribution network planning postitallation evaluation model and the weight of indices in model is arranged；The practical index input distribution network planning postitallation evaluation model of the operation of power networks of detection is assessed, the score value of each index is obtained；The score value of the total practical index of distribution network operation is obtained according to the score value of each index and determines the health status of distribution network operation.The present invention selects to run closely related index with distribution network planning, can accomplish accurate and efficient assessment, lays a good foundation for the health operation of power distribution network, provides effective quantitative criteria, timely and accurately find various problems existing for power distribution network.
Description
Technical field
The present invention relates to a kind of distribution network operation health state evaluation methods, belong to the technical field of electric power system optimization.
Background technology
In order to accelerate to promote distribution network construction transformation, National Energy Board to formulate distribution network construction transformation action plan.Meter
It draws and arrives the year two thousand twenty, inner city intelligent construction and application level greatly improve, and power supply reliability reaches 99.99%, Yong Huting
The electric time is no more than 1 hour, and power supply quality is reached advanced world standards；Urban Areas power supply capacity and power supply safety are horizontal significantly
It is promoted, power supply reliability reaches 99.88% or more, and average power off time of user is no more than 10 hours, ensures regional economy society
It is fast-developing；Rural area and comprehensively solve power grid weakness problem from far-off regions, substantially eliminate long-term " low-voltage ", per family distribution capacity
Not less than 2 kilovolt-amperes.
With the progress of the development and science of society, people are higher and higher to the requirement securely and reliably powered, to meet day
The high power demands that benefit increases, power grid scale are gradually expanded, and equipment is increasing, and thing followed equipment operation risk is gradually shown
Existing, equipment operation risk threatens the safe and stable operation of power grid at any time.Operation of power networks wind is being reduced as far as possible therefore, it is necessary to stand
The height of danger, it is established that scientific and reasonable operation of power networks state evaluation and risk evaluation model realize that Risk Pre-control, enhancing are set
The specific aim and validity of standby maintenance, ensure the safe and stable operation of electric system.
Invention content
Technical problem to be solved by the present invention lies in overcome the deficiencies of the prior art and provide a kind of distribution network operation health
State evaluating method, solution conventional electrical distribution on-Line review valence system appraisal setup measures are cumbersome, and evaluation characteristic is single, and evaluation result is credible
The problems such as degree is not high.
The present invention specifically uses following technical scheme to solve above-mentioned technical problem：
A kind of distribution network operation health state evaluation method, includes the following steps：
Choose index needed for distribution network operation health state evaluation；
The standards of grading calculated for index for selection are established, and corresponding for setup measures according to the scoring of each index of calculating
Pointer type；
Standards of grading in conjunction with the index and corresponding pointer type, structure distribution network planning postitallation evaluation model are simultaneously right
The weight setting of indices in model；
The practical index input distribution network planning postitallation evaluation model of the operation of power networks of detection is assessed, each index is obtained
Score value；
The score value of the total practical index of distribution network operation is obtained according to the score value of each index and determines power distribution network
The health status of operation.
Further, as a preferred technical solution of the present invention：Distribution network operation health shape is chosen in the method
Index includes needed for state assessment：Capacity-load ratio, Rate of average load, the heavy duty of circuit peak load, utilization rate of equipment and installations, line failure rate,
Line loss per unit, unit power supply cost, Unit Assets increase power supply volume.
Further, as a preferred technical solution of the present invention：It will be established using hundred-mark system method in the method
The standards of grading that index calculates.
Further, as a preferred technical solution of the present invention：In the method Dare is used according to standards of grading
Corresponding pointer type is arranged in luxuriant and rich with fragrance method.
Further, as a preferred technical solution of the present invention：The distribution network planning operation established in the method
Evaluation model includes power distribution network As-Is Assessment module, power distribution network Development and Harmony evaluation module, power distribution network operation energy efficiency evaluation mould
Block and economic benefit estimation module.
Further, as a preferred technical solution of the present invention：Binding hierarchy analytic approach and Dare in the method
Model middle finger target weight is arranged in luxuriant and rich with fragrance method.
The present invention uses above-mentioned technical proposal, can have the following technical effects：
The distribution network operation health state evaluation method of the present invention, establishes the power distribution network based on distribution network planning and operation
Overall evaluation system model, selection run closely related index with distribution network planning, quantify the important journey between sane level index
Degree sets index weights, and the evaluation criteria and standards of grading according to index calculate bottom item by item according to the computational methods of index
Index value and scoring, can accomplish accurate and efficient assessment, provide reliable assessment result for distribution network operation, overcome biography
The problems such as power grid appraisement system evaluation index setting under unified central planning is cumbersome, and evaluation characteristic is single, and evaluation result confidence level is not high.
The present invention can be that the health operation of power distribution network lays a good foundation, and provide effective quantitative criteria, accurate in time
It really finds various problems existing for power distribution network, scientific basis is provided for China's power distribution network development construction, looked forward to for China's electric power
The numerous stakeholder of industry make correct decisions and provide effective guarantee, while being also the development work of China's future intelligent distribution network
Provide strong reference.
Description of the drawings
Fig. 1 is the flow diagram of distribution network operation health state evaluation method of the present invention.
Fig. 2 is the basic framework of distribution network planning postitallation evaluation model of the present invention.
Fig. 3 is the curve graph of figure of merit in the present invention.
Specific implementation mode
Embodiments of the present invention are described with reference to the accompanying drawings of the specification.
As shown in Figure 1, the present invention devises a kind of distribution network operation health state evaluation method, include the following steps：
Step 1 chooses index needed for distribution network operation health state evaluation, is run closely by selection and distribution network planning
Relevant index specifies each index connotation.
The present embodiment is according to establish power distribution network appraisement system six big principles, in combination with analytic hierarchy process (AHP), fuzzy synthesis
Evaluation assessment, with reference to the associated documents that State Grid Corporation of China promulgates, for power distribution network present situation, Development and Harmony, operation efficiency and warp
Four aspects of benefit of helping, have chosen basic index of 11 indexs as following assessment models, but the present invention is not limited to those to refer to
Mark.
A) capacity-load ratio：Capacity-load ratio is the ratio of transformer equipment total capacity and power supply area network for the load in power supply area, is used
To show the installed capacity and highest actual motion capacity relationship in the region, reflect capacity spare condition.
B) Rate of average load：Rate of average load can be from macroscopically reflection line powering capacity or distribution transforming attaching capacity and confession
The equilibrium relation of electric load.
C) circuit peak load heavily loaded (underloading) ratio：The index is primarily referred to as same voltage class heavy duty in survey region
(underloading) circuit accounts for the ratio of whole number of, lines.Its ratio is smaller, then sharing of load is more uniform.
D) reliability：Reliability mainly chooses average power off time of user and year family is averaged, and two evaluations of frequency of power cut refer to
Mark.
E) power supply quality：The present invention is using user terminal rate of qualified voltage and average rate of qualified voltage as measurement power supply quality
Index.
F) power supply safety standard：Power supply safety standards at different levels are as statistic.
G) utilization rate of equipment and installations：The index is mainly used to utilization ratio of the valuator device under operation of power networks.Standards of grading master
If being compared scoring with the previous year.Utilization rate is higher to show that equipment service condition is more excellent.
H) circuit (distribution transforming) failure rate：The index can reflect distribution operation and management level and the controller switching equipment general level of the health.
Failure rate is lower, and power supply reliability level is higher.
I) line loss per unit：The index can reflect the efficiency of line transmission electric energy, be the ratio of line loss electricity and powering quantity,
Typically obtained with power supply volume and electricity sales amount difference.
J) unit power supply cost：The index is used for reflecting the size of unit electricity sales amount cost.
K) Unit Assets increase power supply volume：The corresponding increasing power supply volume of unit power grid asset mainly reflects power supply volume and investment relation
Index.
Step 2 establishes the standards of grading calculated for index for selection, and it is setup measures to be scored according to each index of calculating
Corresponding pointer type.
Distribution network planning postitallation evaluation system will be based on the evaluation of each bottom index, and the scoring of bottom index is to comment
The key of valence system.Different indexs have different number grade and dimension, it is therefore desirable to ability after evaluation index is normalized
Carry out the overall evaluation.The present embodiment preferably uses hundred-mark system method that will establish the standards of grading that index calculates, using hundred-mark system, profit
The scoring for being quantified as directly comparing by specific basic data with direct index, negative index, the type Scale Method of intermediary outcomes
Standard.So-called direct index refers to that the actual value that formula calculates is bigger, and the positive effect that can be played in evaluation procedure is bigger
The scoring of index, i.e. index is higher；Negative index refers to the index that actual value is inversely proportional with index standards of grading；Intermediary outcomes refer to
The centre or subinterval in index value section can obtain best result, and this take the sections of best result both sides then can gradually under
Drop.
In this method preferably, corresponding pointer type is arranged using Delphi method according to standards of grading, by using moral
Er Feifa is a series of representative point of index values and corresponding scoring that index selection is bonded its planning operation feature, and evaluation is referred to
Mark has been divided into direct index, negative index and intermediary outcomes three classes.According to《Power supply system customer power supply reliability evaluation regulation》And state
Net directive/guide, following table list the type and scoring formula of index.Wherein, S is evaluation score.Wherein, Rs：Capacity-load ratio
Kp：Year load average growth rate.
Step 3, the standards of grading in conjunction with the index and corresponding pointer type build distribution network planning postitallation evaluation mould
Type is simultaneously arranged the weight of indices in model.
The superior and the subordinate between the clear indices of the present invention or sane level relationship establish distribution network planning postitallation evaluation model,
The internal and external factor that distribution network planning operation is influenced around user, load, equipment, benefit etc., from total system, according to index category
Property, and binding hierarchy analytic approach.Include 4 modules by distribution network planning postitallation evaluation model, including：Power distribution network As-Is Assessment mould
Block, power distribution network Development and Harmony evaluation module, power distribution network operation energy efficiency evaluation module and economic benefit module.Specifically：
A) power distribution network As-Is Assessment module.The module is used for average from the capacity-load ratio in power distribution network index, rate of load condensate, user
Power off time, user's rate of qualified voltage are as assessment basis, and specifically, power distribution network As-Is Assessment module utilizes the appearance in index to carry
Power supply capacity is assessed than, rate of load condensate；Power distribution network As-Is Assessment module utilizes average power off time of user assessment reliability and distribution
Net As-Is Assessment module assesses power supply quality using user's rate of qualified voltage so that power distribution network accurately can be commented tentatively now
Estimate.The module has great importance for the construction and development of power distribution network, reliable from power supply capacity, power supply quality and power supply
Property aspect it is horizontal to assess power distribution network security reliability.
B) power distribution network Development and Harmony evaluation module.The module is used for from the matching factor in power distribution network index, each power supply
Safety standard is as assessment basis, and specifically, module is using the matching factor in power distribution network index as power distribution network Development and Harmony
Evaluation condition, the case where obtaining power distribution network Development and Harmony；And module assists Power grid structure with each power supply safety standard
Tonality is assessed, and the harmony of Net Frame of Electric Network is assessed.Harmony assessment is mainly concerned with power network development scale, enlarging ratio and divides
The cloth energy accesses power distribution network etc., which mainly can extend feelings from power grid scale and load development match condition, power grid
Condition etc. assesses power distribution network Sustainable Development.
C) power distribution network runs energy efficiency evaluation module.The module is used for from the line failure rate in power distribution network index, substation
Failure rate is used as assessment basis, specifically, module commenting as equipment failure rate using line failure rate and substation fault rate
Estimate condition, obtains the fault condition and assessment equipment utilization rate, failure recovery time of equipment, the module is mainly from equipment profit
Power distribution network Assets are assessed with situation, equipment fault situation etc..
D) assessment of economic benefit module.The module is used for from the high-voltage line loss rate, middle crimping loss rate, low in power distribution network index
Assessment basis of the crimping loss rate as line loss per unit increases power supply volume in combination with unit power supply cost, the Unit Assets in index
The economic benefit of power distribution network is assessed.Economic benefit module is to weigh the important indicator of power distribution network performance driving economy.Emphasis
Power distribution network economical operation benefit is assessed from line loss per unit, unit power supply cost etc..
Distribution network planning postitallation evaluation model constructed by the present invention is a multi-level index system, reference system point
The basic theories of the integrated evaluating methods such as analysis method and analytic hierarchy process (AHP), distribution network planning postitallation evaluation model overall frame by
3 levels are constituted, and overall framework is as shown in Figure 2.
The distribution network planning postitallation evaluation model that Fig. 2 is established is based on analytic hierarchy process (AHP), divides 3 levels from top to bottom：
(1) destination layer based on first class index：The overall objective, in particular to power grid present situation of distribution network planning postitallation evaluation
Four assessment, the assessment of power network development harmony, distribution operation measures of effectiveness and assessment of economic benefit aspects.
(2) it is based on two-level index rule layer：It determines the evaluation angle of rating system and integral frame, in particular to is contained in
The primary evaluation index of four modules of destination layer；
(3) the sub- rule layer based on three-level index：The various aspects of rule layer are further developed in details, propose to influence.
Calculate the scoring of bottom index first by above-mentioned three layers, further according to evaluation index system, Layer by layer recurrence obtains
The scoring of grade index and general objective.
Comprehensive factor of Electric Power Network Planning operation；Quantify the significance level between sane level index, sets index weights.Weight is set
Set be appraisement system important link, index weights setting it is reasonable whether evaluation result will be had a direct impact.Level
Analytic approach is to carry out the common method of weight setting with Delphi method, the former is based on subjective judgement, and aid decision making person does
Go out objective analysis, is a kind of practical multiple attributive decision making method；The latter is summarized to multiple Independent Expert's opinions, by expert
Directly participate in the setting of index weights.Analytic hierarchy process (AHP) belongs to objective analysis method, and Delphi rule is subjective analysis method, in order to fill
The advantage of two methods is waved in distribution, and this patent determines the weight of each index using the method that the two is combined.Binding hierarchy
The basic procedure that model middle finger target index weights are arranged in analytic approach and Delphi method is as follows：
A) it is directed to n index of same layer, establishes comparator matrix two-by-two：
A=(aij)n×n
Wherein, aijIndicate the relative importance of index i and j, and aij=1/aji。
B) Delphi method is used, for m judgment matrix of n Index Establishment：
A(K)=(aij (K))m×m, k=1,2 ..., m
Wherein m is expert's number.
C) a is soughtij(k) average value
D) traversal k judges a from 1~kij(k) whether it is more than predetermined threshold value, A is labeled as if being more than(k)。
E) traversal i is from 1~m, and j is from 1~m, if there is s A(k)It is labeled, then remove this s judgment matrix A(k), final
Retain (m-s) a matrix for meeting condition for consistence, is denoted as m'.
F) processing is averaged to a matrixes of m ', obtainedWhereinFor corresponding a in each matrixes of m 'ij(k)
Average value, A ' is final consistent judgment matrix.
G) according to analytic hierarchy process (AHP), the maximum eigenvalue λ of consistency judgment matrix A ' is solvedmaxAnd its feature vector ω, it is right
Feature vector is normalized, and obtains the corresponding weight of n evaluation index, judges the one of A ' using random consistency desired result
Cause property is needed to collect expert opinion again and is calculated if not meeting consistency desired result, until by verification.
Step 4 assesses the practical index input distribution network planning postitallation evaluation model of the operation of power networks of detection, obtains
The score value of each index.
According to the evaluation criteria and standards of grading of index, according to the computational methods of index, bottom index value is calculated item by item
And scoring；Here only standards of grading and formula are illustrated by taking line failure rate as an example, determines the scoring formula of line fault
And evaluation figure, line failure rate are indicated by hundred kilometers of number of stoppages.Line failure rate evaluation index full marks are 15 in hundred-mark system
Point, according to《Power supply system customer power supply reliability evaluation regulation》And state's net directive/guide, judgement schematics such as formula
Wherein：S is figure of merit, and A is current year line fault number, and A' is the previous year line fault number.Line fault
Rate index is negative index, and the curvilinear figure of figure of merit is as shown in Figure 3.
Step 5, score value and the determination that the total practical index of distribution network operation is obtained according to the score value of each index
The health status of distribution network operation.
Power distribution network evaluation result needs to establish on the basis of all subitem evaluation indexes, for the scoring knot of each single item index
Fruit be directly related to the overall evaluation it is accurate whether.The present invention carries out evaluation index according to expertise and power distribution network directive/guide
Stepping is scored using curve matching and by the way of tabling look-up.
According to the score value of each bottom index in step 4, according to analytic hierarchy process, Layer by layer recurrence obtains higher level's index
And the score value of general objective, calculation formula are：
Wherein, F(k)Corresponding to kth layer index x(k)Scoring, n x(k)Index number in (k+1) layer, Fi (k+1)
And wi (k+1)It is the scoring from index i and index weights respectively.
Therefore, can according to step 6 calculated total practical index score value, determine the health of distribution network operation
Condition evaluation results, result are health or non-health.
To sum up, distribution network operation health state evaluation method of the invention is established based on distribution network planning and operation
Power distribution network synthesis evaluation system model, selection run closely related index with distribution network planning, quantify between sane level index
Significance level sets index weights, and the evaluation criteria and standards of grading according to index are counted item by item according to the computational methods of index
Bottom index value and scoring are calculated, can accomplish accurate and efficient assessment, is laid a good foundation for the health operation of power distribution network,
Effective quantitative criteria is provided, timely and accurately finds various problems existing for power distribution network.It is provided reliably for distribution network operation
Assessment result, it is cumbersome to overcome conventional electrical distribution on-Line review valence system appraisal setup measures, and evaluation characteristic is single, evaluation result confidence level
The problems such as not high.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be without departing from the purpose of the present invention
It makes a variety of changes.
Claims (6)
1. a kind of distribution network operation health state evaluation method, which is characterized in that include the following steps：
Choose index needed for distribution network operation health state evaluation；
The standards of grading calculated for index for selection are established, and it is the corresponding index of setup measures to score according to each index of calculating
Type；
Standards of grading in conjunction with the index and corresponding pointer type build distribution network planning postitallation evaluation model and to model
The weight of middle indices is arranged；
The practical index input distribution network planning postitallation evaluation model of the operation of power networks of detection is assessed, commenting for each index is obtained
Fractional value；
The score value of the total practical index of distribution network operation is obtained according to the score value of each index and determines distribution network operation
Health status.
2. distribution network operation health state evaluation method according to claim 1, it is characterised in that：It chooses and matches in the method
Index includes needed for operation of power networks health state evaluation：Capacity-load ratio, Rate of average load, the heavy duty of circuit peak load, equipment utilization
Rate, line failure rate, line loss per unit, unit power supply cost, Unit Assets increase power supply volume.
3. distribution network operation health state evaluation method according to claim 1, it is characterised in that：Hundred are used in the method
The standards of grading for dividing method processed that will establish index calculating.
4. distribution network operation health state evaluation method according to claim 1, it is characterised in that：Basis is commented in the method
Corresponding pointer type is arranged using Delphi method in minute mark standard.
5. distribution network operation health state evaluation method according to claim 1, it is characterised in that：It is established in the method
Distribution network planning postitallation evaluation model includes power distribution network As-Is Assessment module, power distribution network Development and Harmony evaluation module, power distribution network
Run energy efficiency evaluation module and economic benefit estimation module.
6. distribution network operation health state evaluation method according to claim 1, it is characterised in that：Binder course in the method
Model middle finger target weight is arranged in fractional analysis and Delphi method.
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