Method and system for adjusting sub-engineering project cost of electric power engineering

Abstract

The invention discloses a sub-engineering project cost adjusting method and system for electric power engineering, and the method comprises the steps: calculating an average capacity-price ratio formed by the ratio of the total installed capacity to the total cost of a generator according to collected historical information, and fitting a cost curve through the capacity-price ratio; the planned total price is obtained through the cost curve slope and the set total installed capacity, and the planned total price is compared with the given highest cost budget to adapt to the corresponding historical sub-project cost allocation scheme, so that the allocation scheme is simple and relatively accurate due to consideration of historical experience.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power engineering cost, and in particular relates to a method and system for adjusting the cost of a sub-engineering project of an electric power engineering project. Background Art

[0002] The power project actually includes several sub-projects, such as infrastructure, structural construction, equipment installation, thermal instrument and control device installation, manual commissioning and testing, etc. Therefore, the setting of project cost is very complicated, and because commodity prices and labor costs often change significantly over time, the project cost changes greatly. For some small power projects, because the project cost is low but there are many projects, it is especially necessary to find a simple and easy adjustment method for the corresponding cost of each sub-project in the power project from the complex cost factors. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention proposes a method and system for adjusting the cost of sub-projects of an electric power project.

[0004] The technical solution of the present invention is as follows:

[0005] A method for adjusting the cost of a sub-project of an electric power project, wherein the electric power project has a limited maximum cost budget and a set total installed capacity, comprising:

[0006] The acquisition occurred in the last N y historical information of historical power projects in the past, the historical information including project information and project information, the project information including the total installed capacity, total cost, construction location and completion time of the generator, and the project information including the sub-projects into which the power project is decomposed and the cost of each sub-project;

[0007] Calculate the unit capacity cost and sub-project cost ratio of each historical power project, wherein the unit capacity cost is formed by the ratio of the total cost of the power project to the total installed capacity, and the sub-project cost ratio is formed by the ratio of the cost of the sub-project in the power project to the total cost;

[0008] Arrange all the calculated unit capacity costs in chronological order and perform curve fitting on the points formed by the unit capacity costs to obtain a cost curve, and obtain the slope of the cost curve;

[0009] Find the historical power project closest to the location of the current power project from the collected historical information, and calculate the estimated total cost of the current power project by using the unit capacity cost of the historical power project and the slope of the cost curve;

[0010] The proposed total cost is compared with the budgeted cost. If the proposed total cost exceeds the maximum cost budget, the historical power project with the closest total installed capacity to the power project in this time is found from the collected historical information, and the ratio of the cost of each sub-project in the historical power project to the total cost is calculated to form a first weight of the cost of each sub-project, and the maximum cost budget is allocated according to the first weight to form the cost of each sub-project; if the proposed total cost does not exceed the maximum cost budget, the historical power project with the closest cost to the power project in this time is found from the collected historical information, and the ratio of the cost of each sub-project in the historical power project to the total cost is calculated to form a second weight of the cost of each sub-project, and the maximum cost budget is allocated according to the weight to form the cost of each sub-project.

[0011] Furthermore, the sub-projects include: infrastructure construction, structural construction, equipment installation, thermal instrument and control device installation and manual commissioning tests.

[0012] Furthermore, the slope of the cost curve adopts the slope corresponding to the end of the cost curve.

[0013] Furthermore, the estimated total construction cost f(x) is calculated according to the following formula:

[0014] f(x)=[Y ld +(x bm -x ld )]k ld R ld (1)

[0015] Where: x is the time variable of the power project, x ld , Y ld , k ld , and R ld are the completion time, unit capacity cost, slope at the end of the cost curve, and total installed capacity of the most recent historical power project at the location of the power project in question, respectively. bd is the start time of this work, (x bd -x ld ) is the time difference between the start time of this construction and the completion time of the most recent historical power project at the location of the power project in question.

[0016] Furthermore, when the proposed total cost exceeds the maximum cost budget, the cost of each sub-project is calculated according to the following formula:

[0017] a i =D 1i R (2)

[0018]

[0019] In the above formula: ai , D 1i are the construction cost and the first weight of the ith sub-project in the power project, R is the budget cost of the power project, A lr is the total cost of the historical power project with the closest installed capacity to the power project in question, a lri It is the construction cost of the ith sub-project in the historical power engineering project that is closest to the installed capacity of the power engineering project in question.

[0020] Furthermore, when the proposed total cost does not exceed the maximum cost budget, the cost of each sub-project is calculated according to the following formula:

[0021] a i =D 2i R (5)

[0022]

[0023] In the above formula: D 2i is the second weight of the ith sub-project in the power project, A lz is the total cost of the historical power engineering project that is closest to the total cost of the power engineering project described in this article, a lzi is the construction cost of the ith sub-project in the historical power engineering project that is closest to the total construction cost of the power engineering project being described.

[0024] Furthermore, the historical power project corresponds to year N y Take 3, 4 or 5.

[0025] A cost adjustment system for a sub-project of an electric power project, wherein the electric power project has a limited maximum cost budget and a set total installed capacity, comprising:

[0026] Database, used to collect the most recent N y The historical information of the power project in 2017 includes the project information and project information. The project information includes the total installed capacity, total cost, construction location and completion time of the generator. The project information includes the sub-projects into which the power project is decomposed and the cost of each sub-project.

[0027] The calculation module is used to calculate the N y The unit capacity cost and sub-project cost ratio of each power project in the annual period, wherein the unit capacity cost is formed by the ratio of the total cost of the power project to the total installed capacity, and the sub-project cost ratio is formed by the ratio of the cost of the sub-project in the power project to the total cost;

[0028] A curve fitting module is used to arrange all the calculated unit capacity costs in chronological order and perform curve fitting on the points formed by the unit capacity costs to obtain a cost curve, and obtain the slope of the cost curve;

[0029] A module for calculating the total cost is used to find the historical power project closest to the location of the power project from the collected historical information, and calculate the total cost of the power project according to the unit capacity cost of the historical power project and the slope of the cost curve;

[0030] The cost adjustment module is used to compare the proposed total cost with the budgeted cost. If the proposed total cost exceeds the maximum cost budget, the completed historical power project closest to the total installed capacity of the power project in question is found from the collected historical information, and the ratio of the cost of each sub-project in the historical power project to the total cost is calculated to form a first weight of the cost of each sub-project, and the budgeted cost is allocated according to the first weight to form the cost of each sub-project; if the proposed total cost does not exceed the maximum cost budget, the historical power project closest to the cost of the power project in question is found, and the ratio of the cost of each sub-project in the historical power project to the total cost is calculated to form a second weight of the cost of each sub-project, and the budgeted cost is allocated according to the weight to form the cost of each sub-project.

[0031] An electronic device comprises a memory and a processor, wherein the memory stores a computer program, and the processor is used to call and run the computer program stored in the memory to execute any of the methods described above.

[0032] A computer-readable storage medium stores a computer program, wherein the computer program implements the steps of any of the above methods when executed by a processor.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention provides a method and system for adjusting the cost of sub-projects of an electric power project. The method calculates an average capacity-price ratio formed by the ratio of the total installed capacity of a generator to the total cost based on collected historical information, fits a cost curve through the capacity-price ratio, obtains a proposed total price through the slope of the cost curve and a set total installed capacity, and adapts a corresponding historical sub-project cost allocation plan by comparing the proposed total price with a given maximum cost budget, thereby making the allocation plan simple and relatively accurate due to consideration of historical experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a process flow of a method for adjusting the cost of a sub-project of a power engineering project in an embodiment;

[0036] Figure 2 Schematic diagram of cost curve in the embodiment. DETAILED DESCRIPTION

[0037] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent modifications of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0038] Embodiment 1:

[0039] The present invention provides a method for adjusting the cost of a sub-project of an electric power project, based on the fact that the electric power project has a limited maximum cost budget and a set total installed capacity. The electric power project has a limited maximum cost budget and a set total installed capacity, such as Figure 1 As shown, including:

[0040] Step 1: Collection occurs in the last N y Historical information of historical power projects in the past year, including project information and project information. Project information includes the total installed capacity, total cost, construction location and completion time of the generators. Project information includes the sub-projects into which the power project is decomposed and the cost of each sub-project;

[0041] Step 2: Calculate the unit capacity cost and sub-project cost ratio of each historical power project, where the unit capacity cost is formed by the ratio of the total cost to the total installed capacity of the power project, and the sub-project cost ratio is formed by the ratio of the cost of the sub-project in the power project to the total cost;

[0042] Step 3, arranging all the calculated unit capacity costs in chronological order and performing curve fitting on the points formed by the unit capacity costs to obtain a cost curve, and obtaining the slope of the cost curve;

[0043] Step 4: Find the historical power project closest to the location of the current power project from the collected historical information, and calculate the estimated total cost of the current power project by using the unit capacity cost of the historical power project and the slope of the cost curve;

[0044] Step 5. Compare the proposed total cost with the budgeted cost. If the proposed total cost exceeds the maximum cost budget, find the historical power project closest to the total installed capacity of this power project from the collected historical information, and calculate the ratio of the cost of each sub-project in the historical power project to the total cost to form the first weight of the cost of each sub-project, and allocate the maximum cost budget according to the first weight to form the cost of each sub-project; if the proposed total cost does not exceed the maximum cost budget, find the historical power project closest to the cost of this power project from the collected historical information, and calculate the ratio of the cost of each sub-project in the historical power project to the total cost to form the second weight of the cost of each sub-project, and allocate the maximum cost budget according to the weight to form the cost of each sub-project.

[0045] Embodiment 2:

[0046] This embodiment is further designed on the basis of the first embodiment in that the sub-engineering project in this embodiment includes: infrastructure construction, structure construction, equipment installation, thermal instrument and control device installation and manual commissioning test.

[0047] Embodiment three:

[0048] This embodiment is further designed on the basis of the first embodiment in that: Figure 2 As shown, the slope of the cost curve in this example adopts the slope corresponding to the end of the cost curve. Figure 2 The horizontal axis is time, which is represented by the year and month when the power project is completed, such as May 22 and July 23.

[0049] Embodiment 4:

[0050] This embodiment is further designed on the basis of the third embodiment in that the proposed total construction cost f(x) is calculated according to the following formula:

[0051] f(x)=[Y ld +(x bm -x ld )]k ld R ld (1)

[0052] Where: x is the time variable of the power project, x ld , Y ld , k ld , and R ld are the completion time of the most recent historical power project at the location of this power project, the unit capacity cost, the slope at the end of the cost curve, and the total installed capacity, respectively. bd is the start time of this work, (x bd -x ld ) is the time difference between the start time of this power project and the completion time of the most recent historical power project at the location of this power project.

[0053] Embodiment five:

[0054] This embodiment is further designed on the basis of the third embodiment in that when the total cost to be calculated exceeds the maximum cost budget in this embodiment, the cost of each sub-project is calculated according to the following formula:

[0055] a i =D 1i R (2)

[0056]

[0057] In the above formula: a i , D 1i are the cost and first weight of the i-th sub-project in this power project, R is the budget cost of this power project, A lr is the total cost of the historical power project with the closest installed capacity to the current power project, a lri is the construction cost of the ith sub-project in the historical power engineering project that is closest to the installed capacity of this power engineering project.

[0058] Embodiment six:

[0059] This embodiment is further designed on the basis of the third embodiment in that when the total cost to be calculated does not exceed the maximum cost budget in this embodiment, the cost of each sub-project is calculated according to the following formula:

[0060] a i =D 2i R (5)

[0061]

[0062] In the above formula: D 2i is the second weight of the ith sub-project in this power project, A lz is the total cost of the historical power project that is closest to the total cost of this power project, a lzi is the construction cost of the ith sub-project in the historical power engineering project that is closest to the total construction cost of this power engineering project.

[0063] Embodiment seven:

[0064] This embodiment is further designed on the basis of the first embodiment in that the historical power project in this embodiment corresponds to the year N y Take 3, 4 or 5.

[0065] Embodiment eight:

[0066] The present invention provides a cost adjustment system for a sub-project of an electric power project, wherein the electric power project has a limited maximum cost budget and a set total installed capacity, including

[0067] Database, used to collect the most recent N y The historical information of the power projects in 2017 includes project information and project information. The project information includes the total installed capacity, total cost, construction location and completion time of the generators. The project information includes the sub-projects into which the power projects are decomposed and the cost of each sub-project.

[0068] The calculation module is used to calculate the y The unit capacity cost and sub-project cost ratio of each power project in the annual period, where the unit capacity cost is formed by the ratio of the total cost of the power project to the total installed capacity, and the sub-project cost ratio is formed by the ratio of the cost of the sub-project in the power project to the total cost;

[0069] A curve fitting module is used to arrange all the calculated unit capacity costs in chronological order and perform curve fitting on the points formed by the unit capacity costs to obtain a cost curve, and obtain the slope of the cost curve;

[0070] The estimated total cost module is used to find the historical power project closest to the location of the current power project from the collected historical information, and calculate the estimated total cost of the current power project by using the unit capacity cost of the historical power project and the slope of the cost curve;

[0071] The cost adjustment module is used to compare the proposed total cost with the budgeted cost. If the proposed total cost exceeds the maximum cost budget, the completed historical power project closest to the total installed capacity of this power project is found from the collected historical information, and the ratio of the cost of each sub-project in the historical power project to the total cost is calculated to form the first weight of the cost of each sub-project, and the budgeted cost is allocated according to the first weight to form the cost of each sub-project; if the proposed total cost does not exceed the maximum cost budget, the historical power project closest to the cost of this power project is found, and the ratio of the cost of each sub-project in the historical power project to the total cost is calculated to form the second weight of the cost of each sub-project, and the budgeted cost is allocated according to the weight to form the cost of each sub-project.

[0072] Embodiment nine:

[0073] An electronic device includes a memory and a processor, wherein the memory stores a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method of any of the above embodiments.

[0074] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of any of the above embodiments are implemented.

[0075] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A method for adjusting the cost of a sub-project of an electric power project, wherein the electric power project has a limited maximum cost budget and a set total installed capacity, characterized in that: include: The acquisition occurred in the last N y historical information of historical power projects in the past, the historical information including project information and project information, the project information including the total installed capacity, total cost, construction location and completion time of the generator, and the project information including the sub-projects into which the power project is decomposed and the cost of each sub-project; Calculate the unit capacity cost and sub-project cost ratio of each historical power project, wherein the unit capacity cost is formed by the ratio of the total cost of the power project to the total installed capacity, and the sub-project cost ratio is formed by the ratio of the cost of the sub-project in the power project to the total cost; Arrange all the calculated unit capacity costs in chronological order and perform curve fitting on the points formed by the unit capacity costs to obtain a cost curve, and obtain the slope of the cost curve; Find the historical power project closest to the location of the current power project from the collected historical information, and calculate the estimated total cost of the current power project by using the unit capacity cost of the historical power project and the slope of the cost curve; The proposed total cost is compared with the budgeted cost. If the proposed total cost exceeds the maximum cost budget, the historical power project closest to the total installed capacity of the power project is found from the collected historical information, and the ratio of the cost of each sub-project in the historical power project to the total cost is calculated to form a first weight of the cost of each sub-project, and the maximum cost budget is allocated according to the first weight to form the cost of each sub-project; If the proposed total cost does not exceed the maximum cost budget, find the historical power project closest to the cost of the power project in question from the collected historical information, and calculate the ratio of the cost of each sub-project in the historical power project to the total cost to form a second weight of the cost of each sub-project, and allocate the maximum cost budget according to the weight to form the cost of each sub-project.

2. The method for adjusting the cost of a sub-project of a power project according to claim 1 is characterized by: The sub-projects include: infrastructure construction, structural construction, equipment installation, thermal instrument and control device installation and manual commissioning tests.

3. The method for adjusting the cost of a sub-project of a power project according to claim 1 is characterized by: The slope of the cost curve adopts the slope corresponding to the end of the cost curve.

4. The method for adjusting the cost of a sub-project of a power project according to claim 3 is characterized by: The proposed total construction cost f(x) is calculated according to the following formula: f(x)=[Y ld +(x bm -x ld )]k ld R ld (1) Where: x is the time variable of the power project, x ld , Y ld , k ld , and R ld are the completion time, unit capacity cost, slope at the end of the cost curve, and total installed capacity of the most recent historical power project at the location of the power project in question, respectively. bd is the start time of this work, (x bd -x ld ) is the time difference between the start time of this construction and the completion time of the most recent historical power project at the location of the power project in question.

5. The method for adjusting the cost of a sub-project of a power project according to claim 3 is characterized by: When the proposed total cost exceeds the maximum cost budget, the cost of each sub-project shall be calculated according to the following formula: a i =D 1i R (2) In the above formula: a i , D 1i are the construction cost and the first weight of the ith sub-project in the power project, R is the budget cost of the power project, A lr is the total cost of the historical power project with the closest installed capacity to the power project in question, a lri It is the construction cost of the ith sub-project in the historical power engineering project that is closest to the installed capacity of the power engineering project in question.

6. The method for adjusting the cost of a sub-project of a power project according to claim 3 is characterized by: When the proposed total cost does not exceed the maximum cost budget, the cost of each sub-project shall be calculated according to the following formula: a i =D 2i R (5) In the above formula: D 2i is the second weight of the ith sub-project in the power project, A lz is the total cost of the historical power engineering project that is closest to the total cost of the power engineering project described in this article, a lzi is the construction cost of the ith sub-project in the historical power engineering project that is closest to the total construction cost of the power engineering project being described.

7. The method for adjusting the cost of a sub-project of a power project according to claim 1 is characterized by: The historical power project corresponds to the year N y Take 3, 4 or 5.

8. A cost adjustment system for a sub-project of an electric power project, wherein the electric power project has a limited maximum cost budget and a set total installed capacity, characterized in that: include Database, used to collect the most recent N y The historical information of the power project in 2017 includes the project information and project information. The project information includes the total installed capacity, total cost, construction location and completion time of the generator. The project information includes the sub-projects into which the power project is decomposed and the cost of each sub-project. The calculation module is used to calculate the N y The unit capacity cost and sub-project cost ratio of each power project in the annual period, wherein the unit capacity cost is formed by the ratio of the total cost of the power project to the total installed capacity, and the sub-project cost ratio is formed by the ratio of the cost of the sub-project in the power project to the total cost; A curve fitting module is used to arrange all the calculated unit capacity costs in chronological order and perform curve fitting on the points formed by the unit capacity costs to obtain a cost curve, and obtain the slope of the cost curve; A module for calculating the total cost is used to find the historical power project closest to the location of the power project from the collected historical information, and calculate the total cost of the power project according to the unit capacity cost of the historical power project and the slope of the cost curve; The cost adjustment module is used to compare the proposed total cost with the budgeted cost. If the proposed total cost exceeds the maximum cost budget, the completed historical power project closest to the total installed capacity of the power project in question is found from the collected historical information, and the ratio of the cost of each sub-project in the historical power project to the total cost is calculated to form a first weight of the cost of each sub-project, and the budgeted cost is allocated according to the first weight to form the cost of each sub-project; If the proposed total cost does not exceed the maximum cost budget, find the historical power project that is closest to the cost of the power project this time, and calculate the ratio of the cost of each sub-project in the historical power project to the total cost to form a second weight of the cost of each sub-project, and allocate the budget cost according to the weight to form the cost of each sub-project.

9. An electronic device, characterized in that: The electronic device comprises a memory and a processor, wherein the memory stores a computer program, and the processor is configured to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method as claimed in any one of claims 1 to 7 are implemented.

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