CN113139723A - Differential evaluation method for profitability of power transmission and transformation project based on cost effect analysis - Google Patents

Differential evaluation method for profitability of power transmission and transformation project based on cost effect analysis Download PDF

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CN113139723A
CN113139723A CN202110426440.3A CN202110426440A CN113139723A CN 113139723 A CN113139723 A CN 113139723A CN 202110426440 A CN202110426440 A CN 202110426440A CN 113139723 A CN113139723 A CN 113139723A
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王晟杰
王维军
苏燎
孙斌
孙杨
杨玉群
王敏
何晓博
董泽源
乔新娜
马红媛
王廉茹
李晓亮
唐庆
赵星宇
康可依
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Economic and Technological Research Institute of State Grid Shaanxi Electric Power Co Ltd
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Economic and Technological Research Institute of State Grid Shaanxi Electric Power Co Ltd
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Abstract

The invention discloses a differential evaluation method for profitability of a power transmission and transformation project based on cost effect analysis, which comprises the steps of collecting historical data in a preset number of years in a target area, and analyzing and classifying the historical data; establishing a power transmission and transformation project net present value rate calculation model; calculating the net present value rates of different types of power transmission and transformation projects; dividing intervals according to the investment amount and evaluating in a grading manner, and carrying out differentiated judgment and analysis on the economic benefits of the power transmission and transformation project; and solving a corresponding value range of main influence factors of the power transmission and transformation project based on the calculation model of the net present rate of the power transmission and transformation project and the value of the good medium evaluation range of the net present rate, and carrying out differential evaluation analysis on the influence factors of the economic benefits of the power transmission project. The invention provides effective value evaluation for decision makers, makes correct judgment and is beneficial to improving investment decision and management level of power transmission and transformation project. The method is suitable for evaluating the original economic benefit of the power transmission and transformation project.

Description

Differential evaluation method for profitability of power transmission and transformation project based on cost effect analysis
Technical Field
The invention belongs to the field of engineering management, and provides a new evaluation index of the profitability of a power grid project according to the original economic benefit evaluation index of a power transmission and transformation project aiming at the newly built power transmission and transformation project.
Background
The traditional evaluation system for the profitability of the power transmission and transformation project of the power grid cannot realize the evaluation of the investment effect of the whole life cycle of the power transmission and transformation project, cannot visually express the unit investment profit level of the project by the amount of money, and is inconvenient for carrying out transverse comparison among different projects. Meanwhile, the influence factors of the net present value rate cannot be intuitively reflected, and the net present value rate cannot be quickly calculated, so that the economic benefit evaluation of the power transmission and transformation project is too complicated. The decision maker can not provide effective value evaluation for the planning project, and then makes correct judgment; in addition, when project evaluation is carried out, analysis cannot be accurately carried out according to economic benefit differentiation evaluation criteria through a traditional power grid power transmission and transformation project profitability evaluation system, and evaluation results of the net present rate of power transmission project cannot be determined.
Disclosure of Invention
The invention aims to provide a new power transmission and transformation project profitability evaluation index, which is introduced as a power transmission line project economic benefit evaluation reference index by considering the time value of capital and the relative significance of indexes on the basis of the traditional power transmission and transformation project profitability evaluation system idea. And obtaining a calculation model of the net present rate index of the power transmission and transformation project according to the financial evaluation method and the evaluation index calculation model of the power transmission and transformation project. And acquiring index values according to the net present value calculation model by collecting historical sample data of the power transmission and transformation project, and dividing different types of differential values and expected values of the net present value indexes of the power transmission and transformation project through statistical analysis. And differential values and expected values of different power transmission and transformation project type net present value index influence factors are obtained through deduction and analysis, and the differential values and the expected values are used as criteria for differential evaluation of profitability of the power transmission and transformation project, so that reference is provided for economic benefit evaluation of the power transmission and transformation project.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a differential evaluation method for profitability of power transmission and transformation engineering based on cost effect analysis comprises the following steps:
s1, collecting historical data of the target area within a preset number of years, carrying out descriptive statistical analysis on the historical data based on statistical analysis software SPSS, and classifying the historical data according to the type of the power transmission project;
s2, introducing a net present rate index, and establishing a power transmission and transformation project net present rate calculation model based on influence factors;
s3, calculating the net present value rates of different types of power transmission and transformation projects based on MATLAB software according to the collected historical data;
s4, dividing intervals according to the investment amount, evaluating the net present value rate of each interval according to the excellent grade, and carrying out differential judgment analysis on the economic benefits of the power transmission and transformation project;
and S5, obtaining a corresponding value range of the main influence factors of the power transmission and transformation project through MATLAB software programming based on the calculation model of the net present value rate of the power transmission and transformation project and the value of the good medium evaluation range of the net present value rate, and carrying out differential judgment and analysis on the influence factors of the economic benefits of the power transmission project.
Furthermore, the historical data is the operation data of the power transmission and transformation project and an evaluation report after the project.
Further, the calculation formula of the power transmission and transformation project net present value rate NPVR is as follows:
Figure BDA0003029674550000021
wherein, TuThe unit investment power increase amount of the power transmission line is represented, P represents the load increase coefficient of the power transmission line, B represents the unit power increase amount income, K represents the income apportionment coefficient,
Figure BDA0003029674550000022
The average annual operating cost of unit electricity in the operating period is shown, and l represents the number of years.
Further, after the historical data is analyzed in step S1, the historical data is classified into a thermal power supply delivery line, a communication line, a new energy delivery line, a load feed line, and a main grid line according to the type of the power transmission project.
Further, the power transmission and transformation project net present value rate NPVR is a ratio of the project financial net present value FNPV to the project initial investment, and a calculation formula of the power transmission and transformation project financial net present value FNPV is as follows:
Figure BDA0003029674550000023
wherein CI represents the annual net cash inflow in the project calculation period; CO represents the net cash outflow during the project calculation period;
since there is no net cash inflow during the construction period of the project and the net cash outflow is equal to the initial investment of the project, the above equation can be converted to the following equation:
Figure BDA0003029674550000031
where R may be expressed as actual revenue for the project year, C may be expressed as actual expenditure cost for the project year, CIVWhich may be expressed as project initial investment costs.
Further, for the thermal power supply transmission line, the main grid line and the new energy transmission line, the income can be expressed as:
R＝λ×[Qs×(1-β)×Ps+Qg×Pg]
wherein, lambda represents the income share proportion of the power transmission project, QsRepresents the project transmission power, beta represents the network loss rate, PsRepresenting the price of the item's transmission, QgRepresentation item of electric quantity passing through network, PgAnd indicating the power price of the electric quantity of the cross-network project.
Further, for the connection line, the annual income comprises electric quantity benefit and capacity benefit, and when the project mainly focuses on the networking function, the annual income of the project only considers the capacity benefit; the electric quantity benefit mainly comprises mutual power transmission electric quantity benefit and peak shaving electric quantity benefit, and the project annual income can be expressed as:
Rl＝λl×(Rd+Rr)
wherein R islDenotes annual income of the connection linelRepresenting the proportion of the income of the transmission project in the project of the interconnection line, RdRepresents the electric charge income, RrIndicating capacity revenue.
Further, the capacity benefit is calculated according to the following method:
calculating capacity benefit according to the proportion of the capacity benefit to the benefit according to project functions;
calculating capacity benefit according to the capacity electricity price policy;
the electricity revenue can be calculated according to the following formula:
Rd＝Qh×Ps+Qt×Pt
wherein R isdIndicating electricity charge, QhIndicating mutual power transmission, QtRepresents the project peak shaver power, PtRepresenting the peak shaver price.
Further, for the load feeder line, the power transmission and distribution income should be calculated by a method of sharing in the power sale in the evaluation area range, as shown in the following formula:
Rk＝λk×Qw×PF
wherein R iskRepresenting the engineering income of the load feed line; lambda [ alpha ]kRepresenting the income share proportion of the power transmission project in the load feed line project; qwIndicating the power sold by the network; pFAnd expressing the amount of the unit electric quantity apportionment.
Further, the initial investment cost of the project may be as follows:
CIV＝Ts×ucc×L
wherein ucc represents the unit capacity length construction cost, and L represents the line construction length.
Due to the adoption of the structure, compared with the prior art, the invention has the technical progress that: the invention provides a new evaluation index of the profitability of the power transmission and transformation project, which is characterized in that on the basis of the traditional evaluation system idea of the profitability of the power transmission and transformation project of a power grid, the time value of capital and the relative significance of indexes are considered, and a single net present value rate index is introduced as a reference index for evaluating the economic benefits of the power transmission and transformation project; acquiring index values according to a net present rate calculation model by collecting historical sample data of the power transmission and transformation project, and dividing different types of differential values and expected values of the net present rate indexes of the power transmission and transformation project through statistical analysis; differential values and expected values of different power transmission and transformation project type net present value index influence factors are obtained through deduction and analysis and are used as criteria for differential evaluation of profitability of the power transmission and transformation project; when the planning design of the power transmission and transformation project is carried out, the exploitable data is compared with the statistical result, effective value evaluation can be provided for a decision maker, correct judgment can be made, investment decision and management level of the power transmission and transformation project can be improved, the statistical result is updated and supplemented continuously in the future along with continuous abundance of production and operation data of new projects, the statistical result has more guiding significance, and more powerful support is provided for project investment decision and review.
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The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present invention.
The invention discloses a differential evaluation method for profitability of a power transmission and transformation project based on cost effect analysis, which comprises the following steps of:
s1, collecting historical data of the target area within a preset number of years, carrying out descriptive statistical analysis on the historical data based on statistical analysis software SPSS, and classifying the historical data according to the type of the power transmission project;
s2, introducing a net present rate index, and establishing a power transmission and transformation project net present rate calculation model based on influence factors;
s3, calculating the net present value rates of different types of power transmission and transformation projects based on MATLAB software according to the collected historical data;
s4, dividing intervals according to the investment amount, evaluating the net present value rate of each interval according to the excellent grade, and carrying out differential judgment analysis on the economic benefits of the power transmission and transformation project;
and S5, obtaining a corresponding value range of the main influence factors of the power transmission and transformation project through MATLAB software programming based on the calculation model of the net present value rate of the power transmission and transformation project and the value of the good medium evaluation range of the net present value rate, and carrying out differential judgment and analysis on the influence factors of the economic benefits of the power transmission project.
In a preferred embodiment of the invention, the historical data is operation data of the power transmission and transformation project and a post-project evaluation report. After the historical data is analyzed in step S1, the data is classified into a thermal power supply transmission line, a communication line, a new energy transmission line, a load feed line, and a main grid line according to the type of the power transmission project.
As a preferred embodiment of the present invention, in step S2, the computation model of net present rate of power transmission and transformation project is derived: the Financial Net Present Value (FNPV) is also called as 'accumulated net present value', and refers to the present value accumulated number of the net cash flow of each year in the calculation period to the initial construction year (reference year) according to the benchmark income rate or the set discount rate of departments or industries in the proposed project. For power transmission projects, the financial benefit of the project should be the revenue gained from engaging in power transmission and distribution services. The transmission and distribution price is calculated according to the principles of reasonable cost, reasonable profit, legal tax and fair burden, and the transmission and distribution income of different types of transmission and distribution projects is determined by the transmission and distribution amount and the unit electric quantity bearing amount. For all transmission projects, the financial net present value FNPV of the transmission and transformation project can be calculated according to the following formula:
Figure BDA0003029674550000061
wherein CI represents the annual net cash inflow in the project calculation period; CO represents the net cash out flow over the project calculation period.
Since there is no net cash inflow during the construction period of the project and the net cash outflow is equal to the initial investment of the project, equation (1) can be converted to the following equation:
Figure BDA0003029674550000062
where R may be expressed as actual revenue for the project year, C may be expressed as actual expenditure cost for the project year, CIVWhich may be expressed as project initial investment costs.
1) For the thermal power supply transmission line, the main grid line and the new energy transmission line, the income can be expressed as
R＝λ×[Qs×(1-β)×Ps+Qg×Pg] (3)
Wherein, lambda represents the income share proportion of the power transmission project; qsIndicating project transmission electric quantity; beta represents the net loss rate; psRepresenting the item power transmission price; qgThe power of the item passing through the network is represented; pgAnd indicating the power price of the electric quantity of the cross-network project.
2) For the connection line (i.e. networking engineering), the annual income should take into account both the electricity and capacity benefits. If the project is mainly based on networking, the annual income of the project can only be considered by the capacity revenue. The electric quantity benefit mainly comprises mutual electric quantity benefit and peak shaving electric quantity benefit. The annual income of the project can be expressed as
Rl＝λl×(Rd+Rr) (4)
Wherein R islRepresenting annual income of the project of the communication line; lambda [ alpha ]lRepresenting the income share proportion of the power transmission project in the communication line project; rdRepresenting the electricity income; rrIndicating capacity revenue.
Wherein, the capacity benefit can be calculated according to the following method:
calculating capacity benefit according to the proportion of the capacity benefit to the benefit according to project functions;
and secondly, calculating the capacity benefit according to the capacity electricity price policy.
The electricity revenue can be calculated according to the following formula:
Rd＝Qh×Ps+Qt×Pt (5)
wherein R isdIndicating electricity charge, QhIndicating mutual power transmission, QtRepresents the project peak shaver power, PtRepresenting the peak shaver price.
3) For the load feed line project, the power transmission and distribution income of the load feed line project is calculated by adopting a method of sharing the power sales in the evaluation area range, and the method is shown as the following formula:
Rk＝λk×Qw×PF (6)
wherein R iskRepresenting the engineering income of the load feed line; lambda [ alpha ]kRepresenting the income share proportion of the power transmission project in the load feed line project; qwIndicating the power sold by the network; pFAnd expressing the amount of the unit electric quantity apportionment.
Actual expenditure cost C for year I of project operation periodtFor example, it can represent the product of the annual delivered power and the average operating cost per power, as shown in the following formula:
Figure BDA0003029674550000071
wherein the content of the first and second substances,
Figure BDA0003029674550000072
the annual average running cost of unit electric quantity is represented; qtRepresents the power transmission quantity of the first year of the operation period, and can be expressed as
Qt＝Q0×(1+p)t (8)
Wherein Q is0Represents the initial power transmission amount of the power transmission line project benchmark year,prepresenting the load increase factor.
Due to initial investment cost C of projectIVDirectly related to the design capacity and, therefore,the initial investment cost of a project may be expressed as follows:
CIV＝Ts×ucc×L (9)
wherein ucc represents the unit capacity length construction cost, and L represents the line construction length.
Considering that annual transmission income of a power transmission project is related to the improved power supply capacity of the power transmission project, the annual income R of the power transmission projecttIt can also be expressed as a function of the amount of boost power, as follows:
Rt＝Q0×(1+p)t×B×K (10)
wherein B represents the gain in unit increase power; k denotes a profit sharing coefficient.
By collation, the transmission project FNPV can be expressed as a function of design capacity and operating conditions as follows:
Figure BDA0003029674550000081
the net present value rate can be expressed as a ratio of the project NPV to the project initial investment, and the obtainable net present value rate expression is compiled:
Figure BDA0003029674550000082
let Tu＝Q0/(TsX ucc × L), representing the reference annual unit investment increase power amount, equation (12) can be simplified as:
Figure BDA0003029674550000083
as can be seen from the formula (13), the net present rate of the power transmission and transformation project is mainly related to the unit investment increased power supply quantity T of the power transmission lineuThe load increase coefficient P of the power transmission line, the unit increase power supply income B, the income apportionment coefficient K, the annual average operating cost of the unit power in the operating period
Figure BDA0003029674550000084
And (4) correlating.
As a preferred embodiment of the present invention, the differential evaluation of the net present value rate of the power transmission and transformation project comprises: in the embodiment, a power transmission project in a certain area is selected as a research object, relevant data such as operation data of five power transmission project items of different types including a thermal power supply output line, a main frame line, a new energy source output line, a connecting line and a load feed line, evaluation reports after the projects and the like are counted by sending a pay table to a power grid company in the area where the project is located and through a research institute, statistical analysis is carried out by applying SPSS software, the value ranges of net present rates of the power transmission project and transformation projects of different types are obtained by combing, dividing intervals according to the data statistical result in the collected data and the investment amount, setting the top 20% evaluation result and the top 20% -40% evaluation result of the net present rate statistical result of the transmission and transformation projects of the same type in the same interval to be excellent and good respectively, the other evaluation results are middle, the expectation of the net present value rate of different types of power transmission and transformation projects is given, and the results are shown in table 1.
TABLE 1 evaluation result range and expectation of net present rate of different types of power transmission projects
Figure BDA0003029674550000085
Figure BDA0003029674550000091
And obtaining the value ranges and expectations of the net present rate of the different types of power transmission and transformation projects through statistical analysis of the operation data of the different types of power transmission and transformation projects in the region. The statistical result reflects the interval range where the values of the net-present rates of different types of power transmission and transformation projects in the area are located at present, and the net-present rates of the given types of power transmission and transformation projects can be rapidly judged through the interval range and an evaluation result is given. In addition, the statistical result reflects the operation conditions of different types of power transmission and transformation project of the region to a certain extent, reveals the quantity characteristics of the different types of power transmission and transformation project of the region in the aspect of profit capacity, reflects and analyzes the investment profit conditions of the different types of power transmission and transformation project of the region on the whole, and is beneficial to comprehensive analysis and transverse comparison. When the planning design of the power transmission and transformation project is carried out, the exploitable data is compared with the statistical result, effective value evaluation can be provided for a decision maker, correct judgment can be made, and the investment decision and management level of the power transmission and transformation project can be improved. In the future, with the continuous enrichment of the production and operation data of new projects, the statistical result is continuously updated and supplemented, and the statistical result becomes more instructive and provides more powerful support for project investment decision and review.
As a preferred embodiment of the present invention, the differentiation judgment basis of the influence factors of the net present rate of the transmission and transformation project order is as follows: on the basis of establishing a net present value rate calculation model, MATLAB software is used for establishing a model to obtain the value range of the main influence factors, and the economic benefit influence factors of the power transmission project are judged and analyzed. As can be seen from the formula (13), the net present rate of the power transmission and transformation project is mainly related to the unit investment increased power supply quantity T of the power transmission lineuThe load increase coefficient P of the power transmission line, the unit increase power supply income B, the income apportionment coefficient K, the annual average operating cost of the unit power in the operating period
Figure BDA0003029674550000101
And (4) correlating. And (3) adopting a single-factor analysis method, namely respectively obtaining the variation ranges of the influence factors under the conditions that the net present value rates are respectively in the excellent evaluation level, the good evaluation level and the medium evaluation level by varying one of the influence factors and then fixing all other factors. Although factors such as the profit sharing coefficient, the unit increased power amount profit, the transmission line load increase coefficient affect the economic benefit of the transmission project, the factors are considered to be objective factors, and therefore, the factors are not taken into consideration when the factors are obtained. And only calculating the corresponding variation range of the unit investment power supply increase amount of the power transmission line and the annual average operating cost of the unit power amount in the operating period.
And counting the variation ranges of model input factors such as unit investment power increment amount, load increment coefficient, unit power increment amount income, income allocation coefficient, unit electric quantity annual average running cost in the running period and the like in different types of power transmission projects, and then taking the average value of the variation ranges as an input value during calculation. In order to analyze the influence of key influence factors on the economic benefit of the power transmission project and weaken the influence of the investment benefit allocation coefficient of the power grid, the investment benefit allocation coefficient in the calculation model is unified to be 0.7. The specific structure is shown in table 2.
TABLE 2 input values taken when different factors of the calculation model are calculated in different types of power transmission projects
Figure BDA0003029674550000111
According to the results of the table 1 and the table 2, combining 13, based on MATLAB software programming, respectively obtaining the variation range of the values of two operation data factors such as the unit investment augmented power supply quantity of the transmission line, the annual average operation cost of the unit electric quantity in the operation period and the like corresponding to the net present value rate in the three-level evaluation result. The results are shown in tables 3 to 4, respectively.
TABLE 3 Unit investment increase power T of transmission lineu(Yuan/kWh) range of variation of value corresponding to net present value rate evaluation level
Figure BDA0003029674550000112
Figure BDA0003029674550000121
TABLE 4 annual average operating cost per unit of electricity
Figure BDA0003029674550000131
(kWh/cell) range of variation of value corresponding to net present value rate evaluation level
Figure BDA0003029674550000132
Figure BDA0003029674550000141
Table 4 details the variation ranges of the values of two factors of the unit investment power increase amount of the transmission line and the annual average operating cost of the unit electric quantity in the operating period, which are obtained according to the economic benefit calculation model of the transmission project, and the values corresponding to the evaluation results of the excellent, good and medium grades of the net present value rate. From the whole view, the variation ranges of the two influence factors corresponding to the excellent grade, the good grade and the medium grade are greatly different; from the perspective of the type of the power transmission project, the value ranges of the same influence factor under three evaluation indexes of excellence, goodness and medium in different power transmission project types are greatly different.
The significance of the invention lies in that: when the power transmission and transformation project planning design is carried out, the exploitable data are compared with the statistical result, the net present value rate of the power transmission and transformation project can be judged rapidly, the evaluation result is given, effective value evaluation is provided for decision makers, correct judgment is made, the operation parameter criterion can provide reference for project planning and evaluation, investment decision and management level of the power transmission and transformation project are improved beneficially, and the influence factor criterion can be used for project investment decision and operation and maintenance evaluation.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A differential evaluation method for profitability of power transmission and transformation engineering based on cost effect analysis is characterized by comprising the following steps:
s1, collecting historical data of the target area within a preset number of years, carrying out descriptive statistical analysis on the historical data based on statistical analysis software SPSS, and classifying the historical data according to the type of the power transmission project;
s2, introducing a net present rate index, and establishing a power transmission and transformation project net present rate calculation model based on influence factors;
s3, calculating the net present value rates of different types of power transmission and transformation projects based on MATLAB software according to the collected historical data;
s4, dividing intervals according to the investment amount, evaluating the net present value rate of each interval according to the excellent grade, and carrying out differential judgment analysis on the economic benefits of the power transmission and transformation project;
and S5, obtaining a corresponding value range of the main influence factors of the power transmission and transformation project through MATLAB software programming based on the calculation model of the net present value rate of the power transmission and transformation project and the value of the good medium evaluation range of the net present value rate, and carrying out differential judgment and analysis on the influence factors of the economic benefits of the power transmission project.
2. The differential evaluation method for profitability of power transmission and transformation projects based on cost effect analysis according to claim 1, wherein the differential evaluation method comprises the following steps: the historical data is power transmission and transformation project operation data and a post-project evaluation report.
3. The method for differential evaluation of profitability of power transmission and transformation projects based on cost effectiveness analysis as claimed in claim 1, wherein the calculation formula of the transmission and transformation project net present value rate NPVR is as follows:
Figure FDA0003029674540000011
wherein, TuThe unit investment increase power supply amount of the power transmission line is shown,
Figure FDA0003029674540000012
represents the load increase coefficient of the power transmission line,
Figure FDA0003029674540000013
represents the unit increase of the power supplyThe income, K represents the income sharing coefficient,
Figure FDA0003029674540000014
The average annual operating cost of unit electricity in the operating period is shown, and t represents the number of years.
4. The differential evaluation method for profitability of power transmission and transformation projects based on cost effect analysis according to claim 1, wherein the differential evaluation method comprises the following steps: after the historical data is analyzed in step S1, the data is classified into a thermal power supply transmission line, a communication line, a new energy transmission line, a load feed line, and a main grid line according to the type of the power transmission project.
5. The differential evaluation method for profitability of power transmission and transformation projects based on the cost effect analysis according to claim 4, wherein the differential evaluation method comprises the following steps: the power transmission and transformation project net present value NPVR is the ratio of the project financial net present value FNPV to the project initial investment, and the calculation formula of the power transmission and transformation project financial net present value FNPV is as follows:
Figure FDA0003029674540000021
wherein CI represents the annual net cash inflow in the project calculation period; CO represents the net cash outflow during the project calculation period;
since there is no net cash inflow during the construction period of the project and the net cash outflow is equal to the initial investment of the project, the above equation can be converted to the following equation:
Figure FDA0003029674540000022
wherein the content of the first and second substances,
Figure FDA0003029674540000023
may be expressed as the actual revenue of the project year,
Figure FDA0003029674540000024
may be expressed as a project year actual expenditure cost,
Figure FDA0003029674540000025
which may be expressed as project initial investment costs.
6. The method for differentially evaluating the profitability of the power transmission and transformation project based on the cost effect analysis according to claim 5, wherein the income of the thermal power supply sending line, the main grid line and the new energy source sending line can be expressed as follows:
R＝λ×[Qs×(1-β)×Ps+Qg×Pg]
wherein, lambda represents the income share proportion of the power transmission project, QsRepresents the project transmission power, beta represents the network loss rate, PsRepresenting the price of the item's transmission, QgRepresentation item of electric quantity passing through network, PgAnd indicating the power price of the electric quantity of the cross-network project.
7. The differential evaluation method for profitability of power transmission and transformation projects based on the cost effect analysis according to claim 5, wherein the differential evaluation method comprises the following steps: for the connection line, the annual income comprises electric quantity benefit and capacity benefit, and when the project mainly focuses on the networking function, the annual income of the project only considers the capacity benefit; the electric quantity benefit mainly comprises mutual power transmission electric quantity benefit and peak shaving electric quantity benefit, and the project annual income can be expressed as:
Rl＝λl×(Rd+Rr)
wherein R islDenotes annual income of the connection linelRepresenting the proportion of the income of the transmission project in the project of the interconnection line, RdRepresents the electric charge income, RrIndicating capacity revenue.
8. The differential evaluation method for profitability of power transmission and transformation projects based on cost effect analysis according to claim 7, wherein the capacity benefit is calculated according to the following method:
calculating capacity benefit according to the proportion of the capacity benefit to the benefit according to project functions;
calculating capacity benefit according to the capacity electricity price policy;
the electricity revenue can be calculated according to the following formula:
Rd＝Qh×Ps+Qt×Pt
wherein R isdIndicating electricity charge, QhIndicating mutual power transmission, QtRepresents the project peak shaver power, PtRepresenting the peak shaver price.
9. The method according to claim 7, wherein the power transmission and transformation project profitability differential evaluation method based on the cost effect analysis is characterized in that, for the load feeder line, the power transmission and distribution income is calculated by a method of sharing among the sales power in the evaluation area, as shown in the following formula:
Rk＝λk×Qw×PF
wherein R iskRepresenting the engineering income of the load feed line; lambda [ alpha ]kRepresenting the income share proportion of the power transmission project in the load feed line project; qwIndicating the power sold by the network; pFAnd expressing the amount of the unit electric quantity apportionment.
10. The method for differential evaluation of profitability of power transmission and transformation projects based on cost effectiveness analysis as claimed in claim 5, wherein the initial investment cost of a project can be represented by the following formula:
CIV＝Ts×ucc×L
wherein ucc represents the unit capacity length construction cost, and L represents the line construction length.
CN202110426440.3A 2021-04-20 2021-04-20 Differential evaluation method for profitability of power transmission and transformation project based on cost effect analysis Pending CN113139723A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115545440A (en) * 2022-09-23 2022-12-30 国网冀北电力有限公司经济技术研究院 Differential evaluation method for bidding project quantity and project settlement quantity construction cost of power transmission and transformation project
CN117474579A (en) * 2023-12-28 2024-01-30 浙江浙能能源服务有限公司 Feasibility analysis method and system for multi-energy scheduling

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115545440A (en) * 2022-09-23 2022-12-30 国网冀北电力有限公司经济技术研究院 Differential evaluation method for bidding project quantity and project settlement quantity construction cost of power transmission and transformation project
CN117474579A (en) * 2023-12-28 2024-01-30 浙江浙能能源服务有限公司 Feasibility analysis method and system for multi-energy scheduling

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