CN110956374A - DEA analysis-based investment efficiency benefit evaluation method for power grid technical improvement project - Google Patents
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Abstract
The invention discloses a DEA analysis-based investment efficiency and benefit evaluation method for a power grid technical improvement project, which comprises the following steps of: the method comprises the following steps: identifying and screening the investment benefit efficiency index of power grid technical improvement from the input and output angles; step two: constructing a power grid technical improvement project investment benefit efficiency index system, and determining an input-output method; step three: inputting input index historical data through a DEA input-output evaluation model, determining output index historical data, and obtaining a benefit efficiency analysis result based on a DEA method. According to the method, the investment benefit efficiency of the power grid technical improvement project is evaluated through the constructed power grid technical improvement project benefit efficiency evaluation index system and the DEA method, the investment management of the power grid technical improvement project is guided through the analysis of the evaluation result, the accurate management and control of the power grid technical improvement project are realized, and effective references are provided for the cost control and the effective operation of power grid construction.
Description
Technical Field
The invention relates to the technical field of power grid power transmission and transformation project construction, in particular to a power grid technical improvement project investment efficiency benefit evaluation method based on DEA analysis.
Background
The investment efficiency benefit evaluation of the current power grid project is mostly to analyze and evaluate the investment efficiency benefit of a newly-built power grid project, and few relevant researches on the investment efficiency benefit evaluation of a power grid maintenance and technical improvement project are available. At present, the investment efficiency evaluation of the power grid technical improvement project is measured and calculated by mostly referring to the investment efficiency evaluation of the power grid construction project, but the method has more problems: (1) the investment benefit of a power grid construction project can be evaluated and measured by using the built power-on effect of the power grid through the comparison method, and project technical improvement usually replaces old parts by using a new process and a new technology without influencing the power transmission and transformation functions of the power grid, so that the efficiency benefit can not be measured and calculated by using the comparison method. (2) In the investment efficiency benefit estimation, the cost and cost analysis is generally carried out by using an expert experience method or a rate applying method to estimate the benefit, and the efficiency is difficult to be scientifically estimated from the perspective of input and output.
Therefore, the method for evaluating the investment efficiency and the benefit of the power grid technical improvement project is expected to solve the problems in the prior art.
Disclosure of Invention
The invention discloses a DEA analysis-based investment efficiency and benefit evaluation method for a power grid technical improvement project, which comprises the following steps of:
the method comprises the following steps: identifying and screening the investment benefit efficiency index of power grid technical improvement from the input and output angles;
step two: constructing a power grid technical improvement project investment benefit efficiency index system, and determining an input-output method;
step three: inputting input index historical data through a DEA input-output evaluation model, determining output index historical data, and obtaining a benefit efficiency analysis result based on a DEA method.
Preferably, the inputting of the index in the first step includes: a manual input index, a financial input index and a material input index.
Preferably, the yield indicator in the first step includes: economic benefit output index, social benefit output index and safety output index.
Preferably, in the third step, according to an index system for evaluating the benefit efficiency of the power grid technical improvement project, the input index is a decision unit, and the DEA input-output evaluation model is as follows:
where θ represents a minimization weight, xiRepresents the input factor, yiRepresenting a yield variable, s a relaxation variable, λiRepresenting the pending weight parameter in the constraint.
Preferably, the step three is to obtain a relative benefit efficiency evaluation value through the DEA input-output evaluation model, and when the relative benefit efficiency evaluation value is 1 or more than 0.99, the investment is considered to be optimized; when the relative benefit efficiency evaluation value is less than 1, the benefit efficiency is low, and optimization needs to be performed by reducing investment.
The invention provides a power grid technical improvement project investment efficiency benefit evaluation method based on DEA analysis, which evaluates the investment benefit efficiency of a power grid technical improvement project through a constructed power grid technical improvement project benefit efficiency evaluation index system and a DEA method, guides investment management of the power grid technical improvement project through analysis of an evaluation result, realizes precise control of the power grid technical improvement project, and provides effective reference for cost control and effective operation of power grid construction. The beneficial effects of the invention include:
1. the method avoids the defect that the investment efficiency benefit of the power grid technical improvement project is analyzed by measuring and calculating the cost by applying a rate approximate calculation mode or subjectivity of traditional artificial estimation, and ensures that the investment management of the power grid technical improvement project is more scientific by constructing a comprehensive evaluation index system from the input and output angles and establishing a DEA (data analysis architecture) evaluation method;
2. the invention carries out quantitative analysis on investment evaluation of power grid technical improvement projects, and improves the working efficiency of investment management;
3. the application of the invention combines result analysis, can realize scientificity and intelligence of project cost estimation, can liberate the workload of project investment management and related auditors, and is beneficial to the management and control work of project cost investment.
Drawings
Fig. 1 is a flow chart of a method for evaluating investment efficiency and benefit of a power grid improvement project based on DEA analysis.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a method for evaluating investment efficiency and benefit of a power grid improvement project based on DEA analysis includes the following steps:
the method comprises the following steps: identifying and screening the investment benefit efficiency index of power grid technical improvement from the input and output angles;
according to the evaluation thought and project characteristics of the power grid technical improvement project, the efficiency of the power grid technical improvement project can be evaluated by referring to the related research of the investment efficiency evaluation of the power grid transmission and transformation project, so that the input-output efficiency evaluation problem can be concluded. When the evaluation indexes are selected, a comprehensive evaluation index system of input indexes and output indexes is respectively screened out by combining the characteristics of power grid technical improvement projects.
Selecting input indexes: the investment of the power grid technical improvement project can be reduced into the investment of three resources, namely human resources, financial resources and physical resources, wherein the manual investment can be obtained by counting the number of people invested in the technical improvement project; the financial investment can be measured by the capital investment, namely adding the labor cost, the mechanical cost and the material cost related to the power grid improvement, and obtaining the capital investment of the improvement engineering according to the related composition, wherein the expenses comprise the construction engineering expense, the installation engineering expense, the equipment purchase expense and other expenses except the expropriation expense. The material investment refers to material resources which are input in the power grid technical improvement process, including replaced power transmission and transformation equipment, related parts, reconstruction materials of related facilities and the like, and generally measures inconvenience for direct measurement when the materials are input, so that the equipment cost can be purchased for measurement.
Selecting output indexes: due to the special attributes of electric power commodities, electric power has two types of outputs of economy and society, and in addition, the purpose of the power grid technical improvement project is to guarantee the safe and stable operation of the power grid and improve the service quality of power transmission and transformation, so the power grid technical improvement project also implies the output for guaranteeing the safety of the power grid. In summary, the screening criteria for these three yield categories are as follows:
1) economic benefit output index: because the power grid technical improvement projects are all project construction on the existing power transmission and transformation projects, the economic benefit of the technical improvement projects is difficult to be separated from the economic benefit of the power transmission and transformation projects, and separate measurement and direct measurement are difficult to be carried out, but the main purpose of the power grid technical improvement projects is to ensure the safe operation of a power transmission and transformation line, so the electricity selling quantity of a power supply area of the technical improvement projects is selected to carry out an indirect measurement mode of the benefit of the technical improvement projects. In addition, the power grid technical improvement project usually updates related lines and equipment, so that the line loss of the transmission and transformation line is reduced, and certain benefit is brought, therefore, the change of the line loss rate is selected as a measurement index in the aspect of economic benefit of the power grid technical improvement project.
2) Social benefit output index: the power grid is a carrier for guaranteeing economic production and transmitting electric energy by users, and has certain social attributes. The main purpose of the power grid technical improvement project is to ensure the electricity consumption of users, so the social benefit output index of the power grid technical improvement project can be measured by the number of users supplying power in the area where the technical improvement project is located; in the case that the number of users is difficult to obtain, the index can be replaced by the population number of the area where the technical improvement project is located.
3) Safety output index: the power grid technical improvement project is generated sometimes when the power grid supply voltage or the power supply reliability value appears in an early warning range and cannot be solved through major repair, and the output of the power grid technical improvement project can be measured through the values before and after the power grid voltage or reliability. In addition, the technical improvement project updates related equipment assets of the power grid, can improve the average service life of the safe service life of the power grid equipment, but the output index is difficult to measure and quantify, so that the difference between the asset value of the power grid at the end of the available year and the asset value of the power grid at the beginning of the year is eliminated, and the asset added value of the newly-built power transmission and transformation project is removed for indirect measurement.
Step two: constructing a power grid technical improvement project investment benefit efficiency index system, and determining an input-output method;
after an input-output index system is determined, an input-output method needs to be determined according to the indexes, and an input-output evaluation method can objectively judge input and output through actual data, so that the related influences of expert experience and subjective factors are reduced.
Step three: inputting input index historical data through a DEA input-output evaluation model, determining output index historical data, and obtaining a benefit efficiency analysis result based on a DEA method.
A DEA input-output evaluation model is constructed, according to an index system of power grid technical improvement project benefit efficiency evaluation, an input index is regarded as a decision unit DMU, and the basic model is as follows:
where θ represents a minimization weight, xiRepresents the input factor, yiRepresenting a yield variable, s a relaxation variable, λiRepresenting the pending weight parameter in the constraint.
And calculating by using the model, obtaining a relative benefit efficiency evaluation value through a calculation result, analyzing the evaluation value, considering investment optimization if the evaluation value is 1 or more than 0.99, and indicating that the benefit efficiency is low if the evaluation value is less than 1, and optimizing by reducing investment.
According to the obtained analysis result, the method can be applied to new power grid technical improvement investment management to guide technical improvement project investment management work.
The invention aims to provide a DEA analysis-based efficiency and efficiency evaluation method for investment of a power grid technical improvement project. The method provided by the invention can scientifically and reasonably evaluate the investment benefit efficiency of the power grid technical improvement project, so that the problems in the power grid technical improvement project cost are effectively monitored and prevented in the initial examination investment approximate calculation period, the investment risk is reduced, and the scientificity of investment management of the power grid technical improvement project is improved.
From the perspective of input and output, a comprehensive evaluation index system is established; wherein the investment is analyzed from the aspects of people, property and thing; the method has the advantages that the characteristics surrounding the power grid technical improvement project are produced, indexes are screened from four aspects of economy, sociality, environmental influence and safety, a comprehensive evaluation system is established, the investment benefit efficiency is evaluated by using historical data, a quantitative analysis result of the investment benefit efficiency evaluation is given, and the subjectivity of expert experience is avoided;
by using a DEA model, the current expert estimation or quota set calculation method is improved, quantitative analysis can be performed on the power grid technical improvement project, and the investment of the power grid technical improvement project is more accurate and scientific;
based on the corresponding evaluation and analysis results, the efficiency and benefit analysis of the evaluation results is given by combining with the engineering investment amount test, relevant suggestions are provided, the scientific management of the power grid technical improvement engineering investment is guided, and the practicability of the method is proved.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A power grid technical improvement project investment efficiency benefit evaluation method based on DEA analysis is characterized by comprising the following steps:
the method comprises the following steps: identifying and screening the investment benefit efficiency index of power grid technical improvement from the input and output angles;
step two: constructing a power grid technical improvement project investment benefit efficiency index system, and determining an input-output method;
step three: inputting input index historical data through a DEA input-output evaluation model, determining output index historical data, and obtaining a benefit efficiency analysis result based on a DEA method.
2. The DEA analysis-based power grid improvement project investment efficiency benefit evaluation method according to claim 1, characterized in that: the input indexes in the first step comprise: a manual input index, a financial input index and a material input index.
3. The DEA analysis-based power grid improvement project investment efficiency benefit evaluation method according to claim 1, characterized in that: the output index in the first step comprises: economic benefit output index, social benefit output index and safety output index.
4. The DEA analysis-based power grid improvement project investment efficiency benefit evaluation method according to claim 2, wherein the method comprises the following steps: in the third step, according to an index system for evaluating the benefit efficiency of the power grid technical improvement project, the input index is a decision unit, and the DEA input-output evaluation model is as follows:
where θ represents a minimization weight, xiRepresents the input factor, yiRepresenting a yield variable, s a relaxation variable, λiRepresenting the pending weight parameter in the constraint.
5. The DEA analysis-based power grid improvement project investment efficiency benefit evaluation method according to claim 4, wherein the method comprises the following steps: thirdly, obtaining a relative benefit efficiency evaluation value through the DEA input-output evaluation model, and considering investment optimization when the relative benefit efficiency evaluation value is 1 or more than 0.99; when the relative benefit efficiency evaluation value is less than 1, the benefit efficiency is low, and optimization needs to be performed by reducing investment.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112132440A (en) * | 2020-09-18 | 2020-12-25 | 国网四川省电力公司经济技术研究院 | Multi-dimensional benefit index analysis method based on DEA theory |
| CN112288240A (en) * | 2020-10-15 | 2021-01-29 | 国网江西省电力有限公司电力科学研究院 | Power distribution network construction project effect evaluation method |
| CN113689313A (en) * | 2021-08-13 | 2021-11-23 | 交通运输部规划研究院 | Method and device for determining generation efficiency of electronic license of transportation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112132440A (en) * | 2020-09-18 | 2020-12-25 | 国网四川省电力公司经济技术研究院 | Multi-dimensional benefit index analysis method based on DEA theory |
| CN112288240A (en) * | 2020-10-15 | 2021-01-29 | 国网江西省电力有限公司电力科学研究院 | Power distribution network construction project effect evaluation method |
| CN112288240B (en) * | 2020-10-15 | 2023-07-04 | 国网江西省电力有限公司电力科学研究院 | Performance evaluation method for power distribution network construction project |
| CN113689313A (en) * | 2021-08-13 | 2021-11-23 | 交通运输部规划研究院 | Method and device for determining generation efficiency of electronic license of transportation |
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