CN103632203A - Distribution network power supply area division method based on comprehensive evaluation - Google Patents
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Abstract
The invention relates to a method for distribution system planning and particularly relates to a distribution network power supply area division method based on comprehensive evaluation. The method comprises the following steps: first, a power supply area to be divided is selected, the status of the power supply area and main factors influencing power supply area division are analyzed and an evaluation index system for power supply area division is established; then, an appropriate method is selected to set weights of evaluation indexes and evaluation standards; and finally, comprehensive evaluation is carried out to determine a division result of the power supply area. The method overcomes the defect that the prior method carries out qualitative classification only based on experiences of experts or leaders. Based on factors influencing distribution network power supply area division, a comprehensive evaluation method is fully utilized and the defect that power supply area division can only be carried out on the basis of quantitative indexes in a clustering analysis method is overcome. The power supply area can be comprehensively evaluated, the weights of the indexes can be adjusted according to actual situations of various regions, the accuracy of the method is greatly improved, and the method has very high engineering application values.
Description
Technical field
The method that the present invention relates to distribution system planning, is specifically related to a kind of power distribution network division of the power supply area method based on comprehensive evaluation.
Background technology
China is vast in territory, and power supply area is vast, and various places socio-economic development situation and electrical network feature difference are obvious.If build power distribution network according to a unified standard, can cause the situation of the not high even serious waste of asset of equipments utilization factor, in technology, unreasonable economically.Therefore, in order to embody regional disparity and distribution network planning, the otherness of building, realize the lean management of power distribution network, improve efficiency and the level of distribution network planning work, promote China's distribution network planning to standardization, Scientific Development, should run through all the time " differentiation planning " theory, in the situation that considering that Regional Economic social development presents non-equilibrium, in conjunction with each department power distribution network present situation and development trend, take into account the differentiation feature of different regions different stages of development, China's power distribution network power supply area is divided, for the distribution network planning of differentiation and the foundation of typical powering mode lay the foundation.
(1) conventional integrated evaluating method
At present, conventional integrated evaluating method has comprehensive scoring method (Composite Grade Method), analytical hierarchy process (AHP), fuzzy comprehensive evaluation method, graphic-arts technique, multiple goal, many Criteria Decision Makings evaluation assessment, comprehensive appraisal expert system and intelligent evaluation system etc.
(2) comprehensive scoring method:
1. the feature of comprehensive scoring method:
More scientific, more quantification that comprehensive scoring method has advantages of, is mainly manifested in:
(1) introduce the concept of weights, evaluation index result has more science;
(2) be conducive to bring into play evaluation index expert's effect;
(3) effectively prevent devious conduct.
Comprehensive scoring method also comes with some shortcomings, and mainly contains:
(1) evaluation index factor and weights are difficult to reasonable definition.Evaluation index factor and weights are determined more complicated, really accomplish scientific and reasonable more difficult;
(2) evaluation index expert is inadaptable.Because the member of expert group belongs to, transfer character temporarily, allow at short notice them fully be familiar with being commented project data, correct factor of evaluation and the weights thereof grasped, have certain difficulty comprehensively;
(3) given judging panel larger power, because judging panel's professional skill is not quite similar, if to not effectively constraint of judging panel, just likely there is " human feelings " relation.
2. the general step of comprehensive scoring method:
Comprehensive scoring method is applicable to evaluation index cannot carry out by unified dimension the occasion of quantitative test, and carries out comprehensive evaluation with nondimensional mark.Comprehensive scoring method is first by the evaluation criterion of different indexs, each evaluation index to be marked respectively, then adopts weighting summation, tries to achieve total points.
3. conventional comprehensive scoring method:
(1) addition point system
Addition scoring Master is added each assessment item obatained score, by total points number evaluate the quality of different schemes.Generally have to connect and add point system and divide a cascade to add two kinds of point systems.
Sometimes according to importance, assessment item is divided into grade, the given standard of each grade is divided, and then by estimator, gives a mark to each project of each scheme, then each index obatained score of each scheme is added, preferred according to the total points of each scheme gained.
(2) connect and take advantage of point system
This method is that each evaluation index obatained score is connected and taken advantage of, and carrys out the quality of evaluation of programme according to the size of product.The feature of this method is that each scheme gained total points difference is larger, more eye-catching because gross score is to connect to take advantage of gained.
(3) method of weighting scores
This method is that each evaluation index of each scheme of supposition has identical best result, and estimator is judgement to evaluation index significance level according to it, gives respectively a weighting coefficient, multiplies each other with the best result of this index, obtains the mark of this index; Then the score of each index is added, obtains the total points of scheme.Although this method is calculated trouble slightly, its result relatively approaches actual.According to weighting coefficient, determine the difference of method, have two kinds of specific algorithms.
According to comparative analysis, determine the probability weight method of weighting coefficient.This method is all to stipulate a best result and corresponding flexible strategy according to the importance of evaluation index, estimator can be according to the flexible strategy of each evaluation index of view correction (determining) of oneself, then the best result of the flexible strategy of each each index of scheme and each index is multiplied each other respectively, add up and be each scheme gained total points, the scheme scoring the most points is optimal case.
According to emphasis index, calculate the method for weighting coefficient.In the evaluation index of scheme, have an index more important, other indexs have again its corresponding requirements, and while having obvious incidence relation between each index, the quality of conventional this method evaluation scheme.
(3) index weights method to set up
Because the evaluation index quantity that evaluation system relates to is of a great variety, and indices reflection evaluation object is in the performance of different aspect, therefore in assessment role, suffered attention degree can not be in full accord, therefore need to determine the weight in assessment of indices.The setting of evaluation index weight is the key content in comprehensive assessment work, has directly reflected the preference degree of evaluator to evaluation index, and has determined the rationalization level of assessment result reflection evaluation object combination property.
Index weights adopts normalized vector to represent, the weight sum of same layer index is 1.When index number is few, its weight is directly determined by expert conventionally; When index number is difficult to decision-making compared with multi-expert, the methods such as general employing analytical hierarchy process (AHP) of determining of its weight size.
The advantage of AHP is to decompose complicated problem by setting up hierarchical structure clearly, by relative scale by people's judgement scalarization, by solving judgment matrix, draw the comprehensive weight of scheme, shortcoming is the ambiguity of having ignored artificial judgement, when the many factors such as uncertain and ambiguity, AHP is vulnerable to the impact of marking person's subjective judgement.
The basic step of analytical hierarchy process is as follows:
(1) clear and definite problem, the scope of getting to the heart of the problem, the factor that understanding problem comprises, determines incidence relation and membership between each factor.
(2) set up evaluation model.Final this evaluation model comprises destination layer, rule layer, indicator layer, solution layer.Each level should mutually disjoint, and the factor of last layer plays dominating role to all or part of factor of adjacent next level, forms top-down successively dominance relation.When many factors that certain level comprises, can be some subhierarchies by this level Further Division.Conventionally the element that in each level, each element is arranged is no more than 9.
(3) structure compares judgment matrix
Judgment matrix represents for last layer time index, the relative importance comparing between two between this level index, this relative importance just forms judgment matrix with numeric representation, the relative importance numerical value comparing is between two generally by nine grades of scaling laws, conventionally get 1～9 and reciprocal (reciprocal represent that mutually importance relatively has contrary similar meaning), contained each factor of each level all can with a factor of last layer time as a comparison criterion do mutual comparison.
(4) Mode of Level Simple Sequence and consistency check thereof
According to judgment matrix, calculate the process of this level index to the relative value (being weighted value) of the importance degree of last layer time certain index, be called Mode of Level Simple Sequence.The method adopting is for asking judgment matrix eigenvalue of maximum characteristic of correspondence vectorial and by its normalization, below method for solving is specifically described.
For each judgment matrix A relatively, all can a corresponding secular equation:
AW＝λW (1)
Solve secular equation (1) after solution vector W normalization, this vector can think that each factor of same level take last layer time factor during as comparison criterion, mutually the relative importance scale after relatively.
(5) level always sorts and consistency check
Calculating all elements in same level is called level for the relative importance scale of top (general objective) and always sorts.This process is successively carried out to lowest level from highest level.Finally, can obtain the weights of importance of each factor of evaluation.
(4) index standards of grading establishing method
1. Delphi (Delphi) method
Delphi method is a kind of fully method of general field expertise, experience and information, claims again expert's scoring.The method is widely applied in systematic analysis and decision domain, is that a kind of multi-expert is taken turns consultation methods more.It repeatedly solicits expert opinion in anonymous mode, and by information communication and circulation feedback, decision-making is reached unanimity, final Approaching Results value.Delphi method has following three features:
(1) anonymity: send respectively information sheet to brainstrust, the expert who participates in consulting service does not know mutually, has eliminated impact each other;
(2) situation feedback between wheel: the result that landman takes turns each is made statistics, and it is issued to every expert as feedback material, reference during for next round consulting investigation;
(3) statistical property of result: adopt statistical method to process result, realize the quantitative Treatment to expert opinion, this is an important feature of Delphi method.
In the application process of Delphi, expert's invaluable experience and wisdom have been brought into play vital role, and this is for analyzing and determining that the input of Complex System Models has original advantage.When concrete each factor of processing, mainly follow following two criterions:
1) expert opinion concentration degree E, scoring a domain expert being provided according to formula (2)
icalculate with the weighted mean that participates in expert's number m.
2) expert opinion dispersion δ, calculates standard deviation according to formula (3).
Expert opinion concentration degree E has reflected the degree of recognition of expert to factor, and expert opinion dispersion shows the have different views degree of expert in this factor problem.When the above-mentioned criterion of concrete application, according to the feature of particular problem, set E
0and δ
0.Correlation computations value E as factor i
iand δ
iwhile meeting formula (4) and formula (5), remain, otherwise reject.
E
i>E
0 （4）
δ
i＜δ
0 （5）
Delphi method is applicable to all evaluation objects, range of application runs through the links of comprehensive evaluation, comprises the screening of evaluation index, the links such as the formulation of the determining of the foundation of index system, index weights, evaluation criterion and comprehensive evaluation can be applied Delphi is solved.The advantage of Delphi method is the impact that expert is not subject to any extraneous factor, can give full play to its subjective initiative.On the basis of a large amount of extensive information, can concentrate the group wisdom of brainstrust, finally obtain approaching actual, reasonably seek advice from result; The major defect of Delphi method is that its needed time may be very long, and the manpower and materials that expend are more; The key of the method is determining of the member of expert team and scale.
2. fuzzy synthetic appraisement method
Fuzzy overall evaluation be take fuzzy mathematics exactly as basis, and application fuzzy relation synthetic principle by some obscure boundaries, be difficult for quantitative factor quantification, is subordinate to being evaluated things a kind of method that grade situation is carried out comprehensive assessment from a plurality of factors.Its nisi with subjection degree " belonging to " or describe " not belonging to " intermediary's degree of difference is a kind of description to ambiguity with accurate mathematical linguistics.The method that this qualitative index rationally quantizes, preferably resolves the uncertainty of raw data or the problems such as ambiguity of evaluation criteria in comprehensive judge.The basic step that application blur method is set up Model for Comprehensive can be expressed as:
1) determine the set of factors of passing judgment on object, factor refers to various attributes or the performance of object, also referred to as parameter index or quality index, and concentrated expression object quality;
2) set up and pass judgment on collection, the set that the evaluation result that judge may make judge object forms;
3) set up simple element evaluation and simple element evaluation fuzzy relation matrix, and then calculate the degree of membership of influence factor to evaluation result;
4) determine index weights, and obtain comprehensive evaluation value.
In division of the power supply area comprehensive assessment index system, part index number has ambiguity to the description of problem, is difficult to represent by definite quantitative relationship, and this problem can well be solved by application fuzzy evaluation.By setting up subordinate function, can utilize degree of membership to reflect that certain object has certain fuzzy quality or belongs to the degree of certain fuzzy concept, concrete degree value size is degree of membership.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of power distribution network division of the power supply area method based on comprehensive evaluation, by the comprehensive scoring method in application comprehensive evaluation, considered the index that can not quantize comprehensively, as administrative grade, load character, load importance etc., can can do one to power supply area comparatively comprehensively evaluates and reasonably divides, the attaching problem that has solved division of the power supply area when two or more indexs exist contradiction in clustering methodology, can provide unique division of the power supply area result.
The object of the invention is to adopt following technical proposals to realize:
The invention provides a kind of power distribution network division of the power supply area method based on comprehensive evaluation, its improvements are, described method comprises the steps:
(1) analyze power distribution network division of the power supply area method and criteria for classifying present situation;
(2) selected power supply area scope of dividing, analyzes the factor of its Actualities and influence division of the power supply area;
(3) set up the assessment indicator system of division of the power supply area;
(4) weight of evaluation index is arranged;
(5) set standards of grading;
(6) power supply area is carried out to comprehensive evaluation;
(7) determine the type of power supply area.
Further, in described step (2), described power supply area area is generally not less than 5km
2(according to the company standard Q/GDW738-2012 < < of State Grid Corporation of China distribution network planning designing technique guide rule > >).
Further, in described step (3), according to the factor that affects division of the power supply area in step (2), from politics, economy and load three aspects:, set up first the assessment indicator system of division of the power supply area, wherein:
Politics index comprises administrative grade;
Economic target comprise a year GDP per capita, year per capita social power consumption, year domestic load and per GDP power consumption per capita;
Load index comprises load density, load character and load priority.
Further, in described step (4), adopt the methods such as AHP Decision Analysis, expert group Decision Method or questionnaire method to arrange the weight of evaluation index; When setting index weights, the weight sum of same layer index is 1.
Further, in described step (5), adopt first the power distribution network division of the power supply area result of cluster analysis to make the opinion rating of every evaluation index, and adopt Delphi method or fuzzy membership method to make standard or the score value scope of every each opinion rating of evaluation index, described standards of grading adopt centesimal system, ten point system or the five-grade marking system.
The power distribution network division of the power supply area of cluster analysis comprises the steps:
A, analysis power distribution network division of the power supply area mode and criteria for classifying present situation;
B, selected power supply area scope of dividing, analyze the factor of its Actualities and influence division of the power supply area;
C, set up the assessment indicator system of division of the power supply area;
The distribution situation of D, analysis each present situation index of power supply area and planning index;
E, achievement data is processed;
F, the data of each index are carried out to cluster analysis, check whether cluster analysis result meets normal distribution;
G, set up the criteria for classifying of power supply area.
Further, in described step (6), utilize integrated evaluating method (as analytical hierarchy process, fuzzy comprehensive evaluation method, Delphi method etc.) to carry out comprehensive evaluation, wherein utilize analytical hierarchy process successively upwards to calculate, until calculate the comprehensive grading of power supply area; Its expression formula is:
In formula: S
(k+1)represent k+1 layer attribute A in hierarchical structure
(k+1)scoring; N represents attribute A
(k+1)k straton attribute number;
represent A
(k+1)the scoring of k straton attribute j;
the weight that represents sub-attribute j.
Further, in described step (7), according to comprehensive evaluation result and standards of grading, determine the type of power supply area.The title of power supply area type and number can be set as required.
The formed achievement in research of application the present invention has been brought in the company standard Q/GDW738-2012 < < of State Grid Corporation of China distribution network planning designing technique guide rule > >.
Compared with the prior art, the beneficial effect that the present invention reaches is:
1. this method application integrated evaluating method, considered the index that can not quantize comprehensively, as administrative grade etc., overcome in clustering methodology and can only carry out according to quantitative target the defect of division of the power supply area, can can do one to power supply area comparatively comprehensively evaluates, increase substantially the accuracy of the method, there is very high engineering using value.
2. this method has considered to affect the principal element of division of the power supply area, from politics, economy, load three aspects:, set up the index system of division of the power supply area, the weight of each index can be adjusted in various places in conjunction with self actual conditions, make the division of power supply area more reasonable, evidence-based.
3. this method adopts the power distribution network block supply division result of cluster analysis, makes the opinion rating of every evaluation index, improves significantly practicality and the accuracy of the method;
4. this method has solved the attaching problem of division of the power supply area when two or more indexs exist contradiction in clustering methodology, can provide unique division of the power supply area result.
5. this method has higher adaptability, has both been applicable to national grid company, provincial Utilities Electric Co., is also applicable to city-level electric company, can lay the foundation for the distribution network planning designing technique guide rule of differentiation and the formulation of Its Relevant Technology Standards.
Accompanying drawing explanation
Fig. 1 is the power distribution network division of the power supply area process flow diagram based on comprehensive evaluation provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Power distribution network division of the power supply area process flow diagram based on comprehensive evaluation provided by the invention as shown in Figure 1, comprises the steps:
(1) investigate existing power distribution network division of the power supply area method and criteria for classifying present situation, analyze the subject matter existing at present;
(2) the selected power supply area scope that will divide, analyzes the principal element of its Actualities and influence division of the power supply area;
(3) multianalysis affects the principal element of division of the power supply area, sets up the assessment indicator system of division of the power supply area from politics, economy and 3 aspects of loading;
(4) select suitable method (as AHP Decision Analysis, expert group Decision Method and questionnaire method etc.) to arrange the weight of evaluation index, index weights has reflected the significance level height between different layers index; In assignment procedure, need to consider the significance level of index, the size of probability of happening and mutually importance relation;
(5) adopt first cluster analysis (a kind of power distribution network division of the power supply area method based on cluster analysis) result to make the opinion rating of every evaluation index, and adopt Delphi method or fuzzy membership method to make standard or the score value scope of every each opinion rating of evaluation index, described standards of grading adopt centesimal system, ten point system or the five-grade marking system;
The power distribution network division of the power supply area of cluster analysis comprises the steps:
A, analysis power distribution network division of the power supply area mode and criteria for classifying present situation;
B, selected power supply area scope of dividing, analyze the factor of its Actualities and influence division of the power supply area;
C, set up the assessment indicator system of division of the power supply area;
The distribution situation of D, analysis each present situation index of power supply area and planning index;
E, achievement data is processed;
F, the data of each index are carried out to cluster analysis, check whether cluster analysis result meets normal distribution;
G, set up the criteria for classifying of power supply area.
(6) utilize integrated evaluating method to carry out comprehensive evaluation, such as adopting analytical hierarchy process (AHP) successively upwards to calculate, until calculate the comprehensive grading of power supply area.Its expression formula is:
In formula: S
(k+1)represent k+1 layer attribute A in hierarchical structure
(k+1)scoring; N represents attribute A
(k+1)k straton attribute number;
represent A
(k+1)the scoring of k straton attribute j;
the weight that represents sub-attribute j.
(7) according to comprehensive grading result and power supply area standards of grading, determine the type of this power supply area.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
(1) power supply area As-Is analysis:
Take Beijing as real case, apply above-mentioned comprehensive scoring method Beijing City, Chaoyang, Haidian, Yi Zhuang, Shijingshan and districts under city administration, 6, Fengtai and Yanqing, Shunyi, Huairou, Changping, Fangshan, Mentougou, Miyun, Tongzhou, Daxing and 10, Pinggu service area at county level are carried out to the division of power supply area type, the numerical value of each index refers to table 1.
Table 12009 year each index value of Beijing power supply area
(2) index is chosen and weight setting:
Choose the principal element that affects division of the power supply area, the method that adopts AHP method of decision analysis and expert group decision-making to combine determines with the weight between layer attribute, and is normalized, and the weight sum of quantificational description same layer index of take is 1.Region Classification Index is chosen and weight arranges as shown in table 2.
Table 2 index is chosen and weight setting
(3) standards of grading setting:
The standards of grading setting of each index refers to table 3.Its middle aged GDP per capita, year per capita social power consumption, year per capita domestic load and 4 indexs of load density according to cluster analysis result, be provided with 8 grades of standards of grading, administrative grade and 2 setup measures of load importance 3 grades of standards of grading; According to various places per GDP power consumption present situation, be provided with 5 grades of standards of grading, load character is provided with 6 grades of standards of grading.
The standards of grading setting of each index of table 3
The single index never ipsilateral of marking has reflected power supply area situation in a certain respect, but is not enough to illustrate the integral status of power supply area, therefore need to determine the comprehensive grading standard of power supply area:
<1>, when the comprehensive grading of power supply area is above at 95 minutes, can be divided into this region A+ class power supply area;
<2> comprehensive grading between 90-95 divides time, can be divided into this region category-A power supply area;
<3> comprehensive grading between 85-90 divides time, can be divided into this region B+ class power supply area;
<4> comprehensive grading between 80-85 divides time, can be divided into this region category-B power supply area;
<5> comprehensive grading between 70-80 divides time, can be divided into this region C+ class power supply area;
<6> comprehensive grading between 60-70 divides time, can be divided into this region C class power supply area;
<7> comprehensive grading between 50-60 divides time, can be divided into this region D+ class power supply area;
<8> comprehensive grading below 50 minutes time, can be divided into this region D class power supply area.
The comprehensive grading standard of table 4 power supply area
| Power supply area type | Standards of grading |
| A+ | 95-100 |
| A | 90-95 |
| B+ | 85-90 |
| B | 80-85 |
| C+ | 70-80 |
| C | 60-70 |
| D+ | 50-60 |
| D- | <50 |
(4) comprehensive grading:
By application comprehensive scoring method, Beijing City, Chaoyang, Haidian, Yi Zhuang, Shijingshan and districts under city administration, 6, Fengtai and Yanqing, Shunyi, Huairou, Changping, Fangshan, Mentougou, Miyun, Tongzhou, Daxing and 10, Pinggu service area at county level are carried out to comprehensive assessment, division of the power supply area result is as follows:
1) city belongs to category-A power supply area;
2) Chaoyang, Yi Zhuang and Haidian belong to B+ class power supply area;
3) Shijingshan, Fengtai belong to category-B power supply area;
4) Shunyi, Tongzhou, Changping, Mentougou, Daxing, Fangshan, Huairou, Pinggu belong to C+ class power supply area;
5) Miyun, Yanqing belong to C class power supply area.
Table 5 Beijing division of the power supply area result
(2) explanation of method and expansion
In the document of publishing at present, still rarely seen to can power distribution network division of the power supply area method studying, Most scholars is all that transformer station's division of the power supply area and optimal power radius are studied.From existing research, the domestic method that power distribution network division of the power supply area be there is no to quantitative calculation and analysis, major part is the classification that expert or leader rely on experience in quality, is difficult to the good with bad of judgement division of the power supply area.Method provided by the invention relies on the comprehensive scoring method in integrated evaluating method, and the index that consideration can not quantize comprehensively, as administrative grade, load character, load importance etc., can be done one to power supply area and comparatively comprehensively evaluate; Weight index can be adjusted in conjunction with self actual conditions in various places, makes division of the power supply area result more reasonable.
In addition, power supply area type division result and power supply area range size to be divided are closely related, if power supply area scope is excessive, can cause the type in some plot in region on the low side or higher, so power supply area range size should be reasonable.
This method has overcome existing method and has only leaned on the shortcoming of expert or leading experience qualitative classification, from affecting the factor of power distribution network division of the power supply area, fully apply the comprehensive scoring method in integrated evaluating method, considered the index that can not quantize comprehensively, as administrative grade etc., overcome in clustering methodology and can only carry out according to quantitative target the defect of division of the power supply area, can can do one to power supply area comparatively comprehensively evaluates, simultaneously the weight of each index can be adjusted in conjunction with self actual conditions in various places, increased substantially the accuracy of the method, there is very high engineering using value, this method has higher adaptability, applicable to division dissimilar, different scales power supply area, can lay the foundation for the distribution network planning designing technique guide rule of differentiation and the formulation of Its Relevant Technology Standards.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present invention, and do not depart from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of claim scope of the present invention.
Claims (7)
1. the power distribution network division of the power supply area method based on comprehensive evaluation, is characterized in that, described method comprises the steps:
(1) analyze power distribution network division of the power supply area method and criteria for classifying present situation;
(2) selected power supply area scope of dividing, analyzes the factor of its Actualities and influence division of the power supply area;
(3) set up the assessment indicator system of division of the power supply area;
(4) weight of evaluation index is arranged;
(5) set standards of grading;
(6) power supply area is carried out to comprehensive evaluation;
(7) determine the type of power supply area.
2. power distribution network division of the power supply area method as claimed in claim 1, is characterized in that, in described step (2), described power supply area area is not less than 5km
2.
3. power distribution network division of the power supply area method as claimed in claim 1, it is characterized in that, in described step (3), according to the factor that affects division of the power supply area in step (2), from politics, economy and load three aspects:, set up first the assessment indicator system of division of the power supply area, wherein:
Politics index comprises administrative grade;
Economic target comprise a year GDP per capita, year per capita social power consumption, year domestic load and per GDP power consumption per capita;
Load index comprises load density, load character and load priority.
4. power distribution network division of the power supply area method as claimed in claim 1, is characterized in that, in described step (4), adopts the methods such as AHP Decision Analysis, expert group Decision Method or questionnaire method to arrange the weight of evaluation index; When setting index weights, the weight sum of same layer index is 1.
5. power distribution network division of the power supply area method as claimed in claim 1, it is characterized in that, in described step (5), adopt first the power distribution network division of the power supply area result of cluster analysis to make the opinion rating of every evaluation index, and adopt Delphi method or fuzzy membership method to make standard or the score value scope of every each opinion rating of evaluation index, described standards of grading adopt centesimal system, ten point system or the five-grade marking system.
6. power distribution network division of the power supply area method as claimed in claim 1, it is characterized in that, in described step (6), utilize comprehensive evaluation to carry out comprehensive evaluation to power supply area, wherein utilize analytical hierarchy process successively upwards to calculate, until calculate the comprehensive grading of power supply area; Its expression formula is:
In formula: S
(k+1)represent k+1 layer attribute A in hierarchical structure
(k+1)scoring; N represents attribute A
(k+1)k straton attribute number;
represent A
(k+1)the scoring of k straton attribute j;
the weight that represents sub-attribute j.
7. power distribution network division of the power supply area method as claimed in claim 1, is characterized in that, in described step (7), according to comprehensive evaluation result and standards of grading, determines the type of power supply area; Title and the number of power supply area type are set according to actual conditions.
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