CN114331737A - Power distribution network investment evaluation method and system based on gray chromatography - Google Patents

Power distribution network investment evaluation method and system based on gray chromatography Download PDF

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CN114331737A
CN114331737A CN202111612556.2A CN202111612556A CN114331737A CN 114331737 A CN114331737 A CN 114331737A CN 202111612556 A CN202111612556 A CN 202111612556A CN 114331737 A CN114331737 A CN 114331737A
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evaluation
distribution network
power distribution
investment
production
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杨小勇
谭锦瑾
俞敏
刘福炎
王会
李则未
黄慧杰
苏礼杰
吴英俊
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Zhejiang Huayun Clean Energy Co ltd
Economic and Technological Research Institute of State Grid Zhejiang Electric Power Co Ltd
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Zhejiang Huayun Clean Energy Co ltd
Economic and Technological Research Institute of State Grid Zhejiang Electric Power Co Ltd
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Abstract

The invention discloses a power distribution network investment evaluation method and system based on a gray layer analysis method, and belongs to the technical field of power distribution network production investment evaluation. The invention discloses a power distribution network investment evaluation method based on a gray layer analysis method, which adopts a three-level hierarchical method to divide indexes and simultaneously determines a first-level investment evaluation weight A of a power distribution network production investment evaluation index UiUAnd the production investment evaluation index V of the power distribution networkijSecond level investment evaluation weight AVFor reflecting the production investment evaluation index U of the distribution networkiAnd VijThe method has the advantages that the important degree of the target W is further comprehensively evaluated, the scheme is scientific and reasonable, and different influences of indexes of different levels on project evaluation can be fully considered; simultaneously, each individual evaluation index is subjected to one-by-oneAnd scoring is carried out, the influence difference of each index on the technical improvement project evaluation is distinguished, so that the accuracy of the technical improvement project evaluation method is effectively improved, the effectiveness and the accuracy of the technical improvement project evaluation are ensured, and the method is convenient to popularize and use.

Description

Power distribution network investment evaluation method and system based on gray chromatography
Technical Field
The invention relates to a power distribution network investment evaluation method and system based on a gray layer analysis method, and belongs to the technical field of power distribution network production.
Background
Chinese patent (publication number: CN110969532A) discloses a power grid production technical improvement project investment effect evaluation method
The invention discloses a power grid production technical improvement project investment effect evaluation method, which comprises the following steps: analyzing influence factors of investment of power grid production technical improvement projects, and constructing an evaluation index system; based on the constructed evaluation index system, the entropy weight method-grey correlation method-TOPSOS method is adopted to calculate the relative closeness, the relative closeness with the optimal ideal solution is relatively close, the numerical value is larger, the evaluated item is more optimal, and the item can be considered preferentially. The entropy weight method, the gray correlation method and the TOPSOS method are adopted to calculate the relative closeness, accurately select the project needing prior improvement, reasonably select and determine the construction sequence of the power grid improvement big project, determine the investment strategy of the power grid, reduce the investment risk of various power grid projects, maximize the investment benefit, improve the project investment benefit, optimize the resource allocation and realize the sustainable development of power grid enterprises.
However, in the above scheme, the evaluation indexes are not graded, different influences of indexes of different grades on the final evaluation of the project are not considered, and meanwhile, differences of influences of individual evaluation indexes on the evaluation of the technically improved project are not specifically explained, so that the evaluation indexes are not processed scientifically and reasonably, the accuracy of the evaluation method is further influenced, the effectiveness and the accuracy of the evaluation of the technically improved project cannot be ensured, and the method is not beneficial to popularization and use.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a three-level hierarchical method, which is scientific and reasonable in scheme and can fully consider the different influences of indexes of different levels on project evaluation, divide indexes, construct weight values of first-level and second-level indexes, gray evaluation weight vectors and weight matrixes, and comprehensively evaluate projects; meanwhile, each individual evaluation index is graded one by one, and the influence difference of each index on the technical improvement project evaluation is distinguished, so that the accuracy of the technical improvement project evaluation method is effectively improved, the effectiveness and the accuracy of the technical improvement project evaluation are ensured, and the power distribution network production project investment evaluation method and the power distribution network production project investment evaluation system which are convenient to popularize and use are achieved.
In order to achieve the above object, a first technical solution of the present invention is:
a power distribution network investment evaluation method based on a gray chromatography,
the method comprises the following steps:
firstly, determining an investment index system of a power distribution network production project according to the characteristics of the investment of the power distribution network production project;
the power distribution network production project investment index system comprises an investment target index W, a primary power distribution network production investment evaluation index and a secondary power distribution network production investment evaluation index; the production investment evaluation index of the primary power distribution network is UiAnd the production investment evaluation index of the secondary power distribution network is Vij；
Secondly, determining a project investment evaluation standard according to the power distribution network production project investment index system in the first step;
project investment evaluationStandard distribution network production investment evaluation index VijDividing into N levels;
thirdly, according to the item investment evaluation standard in the second step, evaluating the distribution network production investment index V of the S-th distribution network production itemijGrading is carried out;
fourthly, constructing an evaluation sample matrix of the production project of the power distribution network according to the scores in the third step;
calculating a gray evaluation matrix by using a whitening weight function through evaluating the sample matrix, and determining an evaluation gray class;
calculating a gray evaluation coefficient by using the evaluation gray;
calculating a gray evaluation weight vector and a weight matrix according to the gray evaluation coefficient;
fifthly, determining the production investment evaluation index U of the power distribution network by using an analytic hierarchy processiFirst-order investment evaluation weight A ofUAnd the production investment evaluation index V of the power distribution networkijSecond level investment evaluation weight AVFor reflecting the production investment evaluation index U of the distribution networkiAnd VijThe degree of importance to the target W;
sixthly, evaluating V of the power distribution network production project for the S according to the grey evaluation weight vector and the weight matrix in the fourth step and each evaluation grey class grading vectoriMaking a comprehensive evaluation
Figure BDA0003435455900000021
Using the second investment evaluation weight A of the fifth stepVAnd ViComprehensive evaluation of (2)
Figure BDA0003435455900000022
Comprehensively evaluating U of the S-th evaluation power distribution network production project(S)；
Reuse of first-level investment evaluation weight AUAnd comprehensive evaluation of U B(S)Calculating the comprehensive evaluation value W of the production project of the power distribution network(S)And the investment evaluation of the production project of the power distribution network is realized.
The invention is continuously explored toAnd testing, namely determining a technical improvement project investment index system according to the characteristics of the investment of the production project of the power distribution network; and dividing the investment index of the technical improvement project into three levels; and determining a first-level investment evaluation weight A of a production investment evaluation index Ui of the power distribution network by using an analytic hierarchy processUAnd the production investment evaluation index V of the power distribution networkijSecond level investment evaluation weight AVFor reflecting the production investment evaluation index U of the distribution networkiAnd VijImportance to the target W.
And then the production investment evaluation index V of the distribution network of the S-th distribution network production projectijGrading one by one, and constructing an evaluation sample matrix of the production project of the power distribution network; and a gray evaluation weight vector and a weight matrix are calculated by utilizing the whitening weight function.
And then evaluating the V of the production project of the distribution network for the S th according to the grey evaluation weight vector, the weight matrix and each evaluation grey class level valued vectoriMaking a comprehensive evaluation
Figure BDA0003435455900000023
Evaluation of weight A by Secondary investmentVAnd ViComprehensive evaluation of (2)
Figure BDA0003435455900000024
And D, comprehensively evaluating U of the S-th evaluation power distribution network production project by B (S).
Finally, the first-level investment evaluation weight A is utilizedUAnd the comprehensive evaluation B (S) of the U is used for calculating the comprehensive evaluation value W (S) of the production project of the power distribution network and realizing the investment evaluation of the production project of the power distribution network.
The method adopts a three-level hierarchical method to divide the indexes, constructs the weight values of the first-level and second-level indexes, the gray evaluation weight vector and the weight matrix at the same time, and comprehensively evaluates the project, has scientific and reasonable scheme, and can fully consider the different influences of the indexes of different levels on the project evaluation; meanwhile, each individual evaluation index is graded one by one, and the influence difference of each index on the evaluation of the technical improvement project is distinguished, so that the accuracy of the evaluation method of the technical improvement project is effectively improved, the effectiveness and the accuracy of the evaluation of the technical improvement project are ensured, and the method is convenient to popularize and use.
As a preferable technical measure:
in the second step, N is 5, and the production investment evaluation index V of the power distribution networkijAnd assigning values of 5, 4,3,2 and 1, and assigning values of 3.5, 2.5 and 1.5 when the index grade is between adjacent grades.
As a preferable technical measure:
in the third step, the specific method for scoring is as follows:
setting p power distribution network production improvement experts with the sequence number k being 1,2,3,4ijAnd (6) scoring.
As a preferable technical measure:
in the fourth step, the evaluation sample matrix is D(S)The calculation matrix is:
Figure BDA0003435455900000031
wherein, i is 1, 2.. times, m; j ═ 1, 2.., nm；k＝1,2,...,p；
Figure BDA0003435455900000032
The power distribution network production investment evaluation index V of the kth power distribution network production technical improvement expert on the S th power distribution network production projectijScoring is performed;
and S is the serial number of the production project of the power distribution network.
As a preferable technical measure:
the specific method for calculating the gray evaluation matrix by the whitening weight function is as follows:
the ash numbers are e, e is 1,2,3,4,
when e is 1, the ash is "excellent", i.e.
Figure BDA0003435455900000041
The expression is as follows:
Figure BDA0003435455900000042
when e is 2, the ash is "good", i.e.
Figure BDA0003435455900000043
The expression is as follows:
Figure BDA0003435455900000044
when e is 3, the ash is "medium", i.e.
Figure BDA0003435455900000045
The expression is as follows:
Figure BDA0003435455900000046
when e is 4, the ash is "poor", i.e.
Figure BDA0003435455900000047
The expression is as follows:
Figure BDA0003435455900000048
as a preferable technical measure:
the calculation formula of the gray evaluation coefficient is as follows:
evaluation coefficient of ash
Figure BDA0003435455900000051
Means the production investment evaluation index V for the power distribution networkijThe No. S power distribution network production project belongs to the gray evaluation coefficient of the No. e evaluation gray class,
Figure BDA0003435455900000052
total ash evaluation coefficient
Figure BDA0003435455900000053
Means the production investment evaluation index V for the power distribution networkijThe total grey evaluation coefficient of the production project of the No. S distribution network,
Figure BDA0003435455900000054
as a preferable technical measure:
the calculation method of the gray evaluation weight vector and the weight matrix is as follows:
for the S-th power distribution network production project, the power distribution network production investment evaluation index VijGray evaluation weight vector belonging to e-th gray class
Figure BDA0003435455900000055
The calculation formula of (a) is as follows:
Figure BDA0003435455900000056
wherein the content of the first and second substances,
Figure BDA0003435455900000057
for evaluating the production investment index V of the power distribution networkijThe production project of the S-th power distribution network belongs to the grey evaluation coefficient of the 1 st evaluation grey class;
Figure BDA0003435455900000058
for evaluating the production investment index V of the power distribution networkijThe No. S power distribution network production project belongs to the grey evaluation coefficient of the No. 2 evaluation grey class;
Figure BDA0003435455900000059
for evaluating the production investment index V of the power distribution networkijThe No. S power distribution network production project belongs to the grey evaluation coefficient of the No. 3 evaluation grey class;
Figure BDA00034354559000000510
for evaluating the production investment index V of the power distribution networkijThe No. S power distribution network production project belongs to the grey evaluation coefficient of the No. 4 evaluation grey class;
v of the S-th power distribution network production projectiBelonging index VijThe gray evaluation weight matrix of (1) is calculated as follows:
Figure BDA00034354559000000511
Figure BDA00034354559000000512
means the production investment evaluation index V for the power distribution networkijThe production project of the S-th power distribution network belongs to the total grey evaluation coefficient of the 1 st evaluation grey class;
Figure BDA00034354559000000513
means the production investment evaluation index V for the power distribution networkijThe production project of the S-th power distribution network belongs to the total grey evaluation coefficient of the 2 nd evaluation grey class;
Figure BDA00034354559000000514
means the production investment evaluation index V for the power distribution networkijThe production project of the S-th power distribution network belongs to the total grey evaluation coefficient of the 3 rd evaluation grey class;
Figure BDA00034354559000000515
means the production investment evaluation index V for the power distribution networkijAnd the No. S power distribution network production project belongs to the total grey evaluation coefficient of the No. 4 evaluation grey class.
As a preferable technical measure:
the fifth step, the analytic hierarchy process, specifically includes the following contents:
method for determining production investment evaluation index U of power distribution network by establishing judgment matrix and solving characteristic value of matrixiAnd VijThe weight of the power distribution network reflects the production investment evaluation index U of the power distribution networkiAnd VijFor the importance of the target W, the larger the weight, the higher the importance.
As a preferable technical measure:
the sixth step, ViComprehensive evaluation of (2)
Figure BDA0003435455900000061
The calculation formula of (a) is as follows:
Figure BDA0003435455900000062
wherein, C(T)The calculation method is as follows:
taking 4 when e is equal to 1, taking 3 when e is equal to 2, taking 2 when e is equal to 3, and taking 1 when e is equal to 4, each evaluation gray class ranking vector C is equal to 4,3,2, 1;
from ViComprehensive evaluation of (2)
Figure BDA0003435455900000063
Obtaining the affiliated index U of the S-th power distribution network production projecti；
Evaluation weight matrix for gray
Figure BDA0003435455900000064
The comprehensive evaluation result of the index U of the S-th power distribution network production project is
B(S)＝AVR(S)；
Then, an evaluation value calculation formula for comprehensive evaluation of the S-th power distribution network production project is as follows:
W(S)＝AUB(S)。
in order to achieve the above object, a second technical solution of the present invention is:
a power distribution network project investment evaluation system based on a gray chromatographic method,
it includes:
one or more processors;
storage means for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement a method for power distribution grid investment evaluation based on gray tomography as described above.
Compared with the prior art, the invention has the following beneficial effects:
through continuous exploration and test, the investment index system of a technical improvement project is determined according to the characteristics of investment of a production project of the power distribution network; and dividing the investment index of the technical improvement project into three levels; and determining a first-level investment evaluation weight A of a production investment evaluation index Ui of the power distribution network by using an analytic hierarchy processUAnd the production investment evaluation index V of the power distribution networkijSecond level investment evaluation weight AVFor reflecting the production investment evaluation index U of the distribution networkiAnd VijImportance to the target W.
And then the production investment evaluation index V of the distribution network of the S-th distribution network production projectijGrading one by one, and constructing an evaluation sample matrix of the production project of the power distribution network; and a gray evaluation weight vector and a weight matrix are calculated by utilizing the whitening weight function.
And then evaluating the V of the production project of the distribution network for the S th according to the grey evaluation weight vector, the weight matrix and each evaluation grey class level valued vectoriMaking a comprehensive evaluation
Figure BDA0003435455900000071
Evaluation of weight A by Secondary investmentVAnd ViComprehensive evaluation of (2)
Figure BDA0003435455900000072
And D, comprehensively evaluating U of the S-th evaluation power distribution network production project by B (S).
Finally, the first-level investment evaluation weight A is utilizedUAnd comprehensive evaluation B (S) of U, calculating distributionAnd (5) comprehensively evaluating the network production project W (S), and realizing the investment evaluation of the power distribution network production project.
The method adopts a three-level hierarchical method to divide the indexes, constructs the weight values of the first-level and second-level indexes, the gray evaluation weight vector and the weight matrix at the same time, and comprehensively evaluates the project, has scientific and reasonable scheme, and can fully consider the different influences of the indexes of different levels on the project evaluation; meanwhile, each individual evaluation index is graded one by one, and the influence difference of each index on the evaluation of the technical improvement project is distinguished, so that the accuracy of the evaluation method of the technical improvement project is effectively improved, the effectiveness and the accuracy of the evaluation of the technical improvement project are ensured, and the method is convenient to popularize and use.
Drawings
Fig. 1 is a flow chart of the power distribution network project investment evaluation method based on the gray layer analysis method.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
Example 1:
a power distribution network investment evaluation method based on a gray chromatography,
the method comprises the following steps:
firstly, determining a technical improvement project investment index system according to the characteristics of the power distribution network production project investment;
the investment index system of the power distribution network production project comprises an investment target index W and a first-level power distribution network production investment evaluationPrice index and second-level power distribution network production investment evaluation index; the production investment evaluation index of the primary power distribution network is UiAnd the production investment evaluation index of the secondary power distribution network is Vij；
Secondly, determining a project investment evaluation standard according to the power distribution network production project investment index system in the first step;
project investment evaluation standard is distribution network production investment evaluation index VijDividing into N levels;
thirdly, according to the item investment evaluation standard in the second step, evaluating the distribution network production investment index V of the S-th distribution network production itemijGrading is carried out;
fourthly, constructing an evaluation sample matrix of the production project of the power distribution network according to the scores in the third step;
calculating a gray evaluation matrix by using a whitening weight function through evaluating the sample matrix, and determining an evaluation gray class;
calculating a gray evaluation coefficient by using the evaluation gray;
calculating a gray evaluation weight vector and a weight matrix according to the gray evaluation coefficient;
fifthly, determining the production investment evaluation index U of the power distribution network by using an analytic hierarchy processiFirst-order investment evaluation weight A ofUAnd the production investment evaluation index V of the power distribution networkijSecond level investment evaluation weight AVFor reflecting the production investment evaluation index U of the distribution networkiAnd VijThe degree of importance to the target W;
sixthly, evaluating V of the power distribution network production project for the S according to the grey evaluation weight vector and the weight matrix in the fourth step and each evaluation grey class grading vectoriMaking a comprehensive evaluation
Figure BDA0003435455900000081
Using the second investment evaluation weight A of the fifth stepVAnd ViComprehensive evaluation of (2)
Figure BDA0003435455900000082
Comprehensively evaluating U of the S-th evaluation power distribution network production project(S)；
Reuse of first-level investment evaluation weight AUAnd comprehensive evaluation of U B(S)Calculating the comprehensive evaluation value W of the production project of the power distribution network(S)And the investment evaluation of the production project of the power distribution network is realized.
The method adopts a three-level hierarchical method to divide the indexes, constructs the weight values of the first-level and second-level indexes, the gray evaluation weight vector and the weight matrix at the same time, and comprehensively evaluates the project, has scientific and reasonable scheme, and can fully consider the different influences of the indexes of different levels on the project evaluation; meanwhile, each individual evaluation index is graded one by one, and the influence difference of each index on the evaluation of the technical improvement project is distinguished, so that the accuracy of the evaluation method of the technical improvement project is effectively improved, the effectiveness and the accuracy of the evaluation of the technical improvement project are ensured, and the method is convenient to popularize and use.
Example 2:
as shown in fig. 1, a power distribution network investment evaluation method based on gray chromatography,
the method comprises the following steps:
firstly, determining an investment index system of a power distribution network production project according to the characteristics of the investment of the power distribution network production project;
the power distribution network production project investment index system comprises an investment target index W and a primary power distribution network production investment evaluation index UiSecond-level power distribution network production investment evaluation index Vij；
Secondly, determining a project investment evaluation standard according to the power distribution network production project investment index system in the first step;
project investment evaluation standard is distribution network production investment evaluation index VijThe method comprises the steps of dividing the index into 5 levels, assigning values by 5, 4,3,2 and 1, and assigning values by 3.5, 2.5 and 1.5 when the index level is between adjacent levels.
Thirdly, respectively determining a first-level power distribution network production investment evaluation index Ui and a second-level power distribution network production investment evaluation index V by using an analytic hierarchy processijWeight A ofV、AUFor reflecting the production investment evaluation index U of the distribution networkiAnd VijThe degree of importance to the target W;
the analytic hierarchy process determines the production investment evaluation index U of the power distribution network by establishing a judgment matrix and solving a matrix characteristic valueiAnd VijThe weight of the power distribution network reflects the production investment evaluation index U of the power distribution networkiAnd VijFor the importance of the target W, the larger the weight, the higher the importance.
Fourthly, according to the item investment evaluation standard in the second step, the production investment evaluation index V of the distribution network of the S-th production item of the distribution networkijGrading is carried out;
setting p power distribution network production project experts with the sequence number k, k being 1,2,3,4ijAnd (6) scoring.
Fifthly, constructing an evaluation sample matrix of the power distribution network production project according to the scores in the fourth step;
suppose that
Figure BDA0003435455900000091
The power distribution network production investment evaluation index V of the kth power distribution network production technical improvement expert on the S th power distribution network production projectijThe evaluation sample matrix D of the production project of the S-th power distribution network is obtained by scoring(S)Is composed of
Figure BDA0003435455900000092
Wherein, i is 1, 2.. times, m; j ═ 1, 2.., nm；k＝1,2,...,p。
Sixthly, calculating a gray evaluation matrix by using a whitening weight function according to the evaluation sample matrix in the fifth step, and determining an evaluation gray class;
assuming that the gray class number is e (e is 1,2,3,4), a gray evaluation matrix is calculated by using a whitening weight function:
when e is 1, the ash is "excellent", i.e. that
Figure BDA0003435455900000101
The expression is as follows:
Figure BDA0003435455900000102
when e is 2, the ash is "good", i.e.
Figure BDA0003435455900000103
The expression is as follows:
Figure BDA0003435455900000104
when e is 3, the ash is "medium", i.e.
Figure BDA0003435455900000105
The expression is as follows:
Figure BDA0003435455900000106
when e is 4, the ash is "poor", i.e.
Figure BDA0003435455900000107
The expression is as follows:
Figure BDA0003435455900000108
seventhly, calculating a gray evaluation coefficient according to the evaluated gray in the sixth step;
evaluation coefficient of ash
Figure BDA0003435455900000109
Means the production investment evaluation index V for the power distribution networkijThe No. S power distribution network production project belongs to the gray evaluation coefficient of the No. e evaluation gray class,
Figure BDA00034354559000001010
total ash evaluation coefficient
Figure BDA00034354559000001011
Means the production investment evaluation index V for the power distribution networkijThe total grey evaluation coefficient of the production project of the No. S distribution network,
Figure BDA0003435455900000111
eighthly, calculating a gray evaluation weight vector and a weight matrix according to the gray evaluation coefficient in the seventh step;
for the S-th power distribution network production project, the power distribution network production investment evaluation index VijGray evaluation weight vector belonging to e-th gray class
Figure BDA0003435455900000112
V of the S-th power distribution network production projectiBelonging index VijThe gray evaluation weight matrix of
Figure BDA0003435455900000113
Ninth, according to the grey evaluation weight vector and weight matrix in the eighth step, V is comparediCarrying out comprehensive evaluation;
for the S th evaluation of the V of the production project of the power distribution networkiMaking comprehensive evaluation to obtain comprehensive evaluation result
Figure BDA0003435455900000114
Figure BDA0003435455900000115
Wherein, C(T)The calculation method is as follows:
when e is 1, 3 when e is 2, 2 when e is 3, and 1 when e is 4, each evaluation gray scale quantization vector C is 4,3,2, and 1.
Tenth step, according to V of ninth stepiComprehensive evaluation of (1), carrying out comprehensive evaluation on U;
from ViResults of comprehensive evaluation of
Figure BDA0003435455900000116
Obtaining the affiliated index U of the S-th power distribution network production projecti. Evaluation weight matrix for gray
Figure BDA0003435455900000117
The comprehensive evaluation result of the index U of the S-th power distribution network production project is B(S)＝AVR(S)。
Step ten, comprehensively evaluating the production project of the S-th power distribution network according to the comprehensive evaluation of the U in the step ten, wherein a calculation formula of the comprehensive evaluation value is as follows:
W(S)＝AUB(S)
a system embodiment to which the method of the invention is applied:
a power distribution network investment evaluation system based on a gray chromatography method comprises:
one or more processors;
storage means for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement a power distribution network production project investment evaluation method as described above.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (10)

1. A power distribution network investment evaluation method based on a gray chromatography is characterized in that,
the method comprises the following steps:
firstly, determining an investment index system of a power distribution network production project according to the characteristics of the investment of the power distribution network production project;
the power distribution network production project investment index system comprises an investment target index W, a primary power distribution network production investment evaluation index and a secondary power distribution network production investment evaluation index; the production investment evaluation index of the primary power distribution network is UiAnd the production investment evaluation index of the secondary power distribution network is Vij；
Secondly, determining a project investment evaluation standard according to the power distribution network production project investment index system in the first step;
project investment evaluation standard is distribution network production investment evaluation index VijDividing into N levels;
thirdly, according to the item investment evaluation standard in the second step, evaluating the distribution network production investment index V of the S-th distribution network production itemijGrading is carried out;
fourthly, constructing an investment evaluation sample matrix of the power distribution network production project according to the scores in the third step;
calculating a gray evaluation matrix by using a whitening weight function through evaluating the sample matrix, and determining an evaluation gray class;
calculating a gray evaluation coefficient by using the evaluation gray;
calculating a gray evaluation weight vector and a weight matrix according to the gray evaluation coefficient;
fifthly, determining the production investment evaluation index U of the power distribution network by using an analytic hierarchy processiFirst-order investment evaluation weight A ofUAnd the production investment evaluation index V of the power distribution networkijSecond level investment evaluation weight AVFor reflecting the production investment evaluation index U of the distribution networkiAnd VijThe degree of importance to the target W;
sixthly, evaluating V of the power distribution network production project for the S according to the grey evaluation weight vector and the weight matrix in the fourth step and each evaluation grey class grading vectoriMaking a comprehensive evaluation
Figure FDA0003435455890000011
Using the second investment evaluation weight A of the fifth stepVAnd ViComprehensive evaluation of (2)
Figure FDA0003435455890000012
Comprehensively evaluating U of the S-th evaluation power distribution network production project(S)；
Reuse of first-level investment evaluation weight AUAnd comprehensive evaluation of U B(S)Calculating the comprehensive evaluation value W of the production project of the power distribution network(S)And realizing the production project of the power distribution networkAnd (5) investment evaluation.
2. The method of claim 1, wherein the power distribution network investment evaluation method based on gray chromatography,
in the second step, N is 5, and the production investment evaluation index V of the power distribution networkijAnd assigning values of 5, 4,3,2 and 1, and assigning values of 3.5, 2.5 and 1.5 when the index grade is between adjacent grades.
3. The method of claim 1, wherein the power distribution network investment evaluation method based on gray chromatography,
in the third step, the specific method for scoring is as follows:
setting p power distribution network production project experts, wherein the serial number of the power distribution network production project experts is k, and k is 1,2,3 and 4ijAnd (6) scoring.
4. The method of claim 1, wherein the power distribution network investment evaluation method based on gray chromatography,
in the fourth step, the evaluation sample matrix is D(S)The calculation matrix is:
Figure FDA0003435455890000021
wherein, i is 1, 2.. times, m; j ═ 1, 2.., nm；k＝1,2,...,p；
Figure FDA0003435455890000022
Distribution network production investment evaluation index V of kth distribution network production project expert on S distribution network production projectijScoring is performed;
and S is the serial number of the production project of the power distribution network.
5. The method of claim 4, wherein the power distribution network investment evaluation method based on gray chromatography,
the specific method for calculating the gray evaluation matrix by the whitening weight function is as follows:
the ash numbers are e, e is 1,2,3,4,
when e is 1, the ash is "excellent", i.e.
Figure FDA0003435455890000023
The expression is as follows:
Figure FDA0003435455890000031
when e is 2, the ash is "good", i.e.
Figure FDA0003435455890000032
The expression is as follows:
Figure FDA0003435455890000033
when e is 3, the ash is "medium", i.e.
Figure FDA0003435455890000034
The expression is as follows:
Figure FDA0003435455890000035
when e is 4, the ash is "poor", i.e.
Figure FDA0003435455890000036
The expression is as follows:
Figure FDA0003435455890000037
6. the method of claim 5, wherein the power distribution network investment evaluation method based on gray chromatography,
the calculation formula of the gray evaluation coefficient is as follows:
evaluation coefficient of ash
Figure FDA0003435455890000038
Means the production investment evaluation index V for the power distribution networkijThe No. S power distribution network production project belongs to the gray evaluation coefficient of the No. e evaluation gray class,
Figure FDA0003435455890000039
total ash evaluation coefficient
Figure FDA00034354558900000310
Means the production investment evaluation index V for the power distribution networkijThe total grey evaluation coefficient of the production project of the No. S distribution network,
Figure FDA0003435455890000041
7. the method of claim 6, wherein the power distribution network investment evaluation method based on gray chromatography,
the calculation method of the gray evaluation weight vector and the weight matrix is as follows:
for the S-th power distribution network production project, the power distribution network production investment evaluation index VijGray evaluation weight vector belonging to e-th gray class
Figure FDA0003435455890000042
The calculation formula of (a) is as follows:
Figure FDA0003435455890000043
wherein the content of the first and second substances,
Figure FDA0003435455890000044
for evaluating the production investment index V of the power distribution networkijThe production project of the S-th power distribution network belongs to the grey evaluation coefficient of the 1 st evaluation grey class;
Figure FDA0003435455890000045
for evaluating the production investment index V of the power distribution networkijThe No. S power distribution network production project belongs to the grey evaluation coefficient of the No. 2 evaluation grey class;
Figure FDA0003435455890000046
for evaluating the production investment index V of the power distribution networkijThe No. S power distribution network production project belongs to the grey evaluation coefficient of the No. 3 evaluation grey class;
Figure FDA0003435455890000047
for evaluating the production investment index V of the power distribution networkijThe No. S power distribution network production project belongs to the grey evaluation coefficient of the No. 4 evaluation grey class;
v of the S-th power distribution network production projectiBelonging index VijThe gray evaluation weight matrix of (1) is calculated as follows:
Figure FDA0003435455890000048
Figure FDA0003435455890000049
means the production investment evaluation index V for the power distribution networkijThe production project of the S-th power distribution network belongs to the total grey evaluation coefficient of the 1 st evaluation grey class;
Figure FDA00034354558900000410
means the production investment evaluation index V for the power distribution networkijThe production project of the S-th power distribution network belongs to the total grey evaluation coefficient of the 2 nd evaluation grey class;
Figure FDA00034354558900000411
means the production investment evaluation index V for the power distribution networkijThe production project of the S-th power distribution network belongs to the total grey evaluation coefficient of the 3 rd evaluation grey class;
Figure FDA00034354558900000412
means the production investment evaluation index V for the power distribution networkijAnd the No. S power distribution network production project belongs to the total grey evaluation coefficient of the No. 4 evaluation grey class.
8. The method of claim 1, wherein the power distribution network investment evaluation method based on gray chromatography,
the fifth step, the analytic hierarchy process, specifically includes the following contents:
method for determining production investment evaluation index U of power distribution network by establishing judgment matrix and solving characteristic value of matrixiAnd VijThe weight of the power distribution network reflects the production investment evaluation index U of the power distribution networkiAnd VijFor the importance of the target W, the larger the weight, the higher the importance.
9. The method of claim 1, wherein the power distribution network investment evaluation method based on gray chromatography,
the sixth step, ViComprehensive evaluation of (2)
Figure FDA0003435455890000051
The calculation formula of (a) is as follows:
Figure FDA0003435455890000052
wherein, C(T)The calculation method is as follows:
taking 4 when e is equal to 1, taking 3 when e is equal to 2, taking 2 when e is equal to 3, and taking 1 when e is equal to 4, each evaluation gray class ranking vector C is equal to 4,3,2, 1;
from ViComprehensive evaluation of (2)
Figure FDA0003435455890000053
Obtaining the affiliated index U of the S-th power distribution network production projecti；
Evaluation weight matrix for gray
Figure FDA0003435455890000054
The comprehensive evaluation result of the index U of the S-th power distribution network production project is B(S)＝AVR(S)；
Then, an evaluation value calculation formula for comprehensive evaluation of the S-th power distribution network production project is as follows:
W(S)＝AUB(s)。
10. a power distribution network project investment evaluation system based on a gray chromatographic method is characterized in that,
it includes:
one or more processors;
storage means for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement a gray tomography-based power distribution grid investment evaluation method as claimed in any one of claims 1-9.
CN202111612556.2A 2021-12-27 2021-12-27 Power distribution network investment evaluation method and system based on gray chromatography Pending CN114331737A (en)

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