Technical and economic analysis method for technical improvement and overhaul of power grid production

Abstract

The invention discloses a technical and economic analysis method for power grid production technical improvement and overhaul, and belongs to the technical field of power system technical and economic analysis. According to the method, on the basis of a power grid estimation index database from practice, the estimation cost, the budget cost, the budget cost and the settlement cost of a project are calculated in sequence in later actual production technical improvement and overhaul work, technical and economic management of the whole process of the project is carried out, and a data judgment basis is provided, so that the cost is reasonably controlled, and lean management and control are realized; the precise investment level of the power enterprise is improved, excellent project cases are fed back to enrich an estimation index database, sustainable basic data support is provided for improving the precise investment level of the power enterprise, and healthy development of the power enterprise is promoted; the method has the advantages of being high in estimation speed, accurate in cost calculation result of each stage and high in project economic benefit, an accurate judgment basis can be provided for decision making, and the economic management level and the accurate investment level of power enterprises can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of technical and economic analysis of power systems, and in particular relates to a technical and economic analysis method for technical transformation and overhaul of power grid production. Background Art

[0002] The power grid plays an important role in people's lives and economic development. It not only ensures social production, but also ensures the normal operation of people's lives. In the long-term operation of the power grid, various problems will arise over time. Whether it is aging equipment or line damage, it will have an important impact on the safe operation of the power grid. There are safety hazards. Continuing to operate may even cause serious safety accidents. Therefore, it is very important and necessary to carry out production technical transformation and overhaul of the power grid. By carrying out production technical transformation and overhaul of the power grid, upgrading power equipment, systems and lines, etc., the overall operating efficiency of the power grid can be guaranteed and the overall safe operation of the power grid can be guaranteed.

[0003] The power grid production technical transformation and overhaul project mainly refers to the upgrading, transformation, repair and rectification of the technology and equipment of power enterprises, aiming at: 1. optimizing the production process, improving the equipment operation efficiency, thereby improving the production efficiency of power enterprises; 2. timely repairing and updating equipment, reducing the equipment failure rate, thereby improving the safety production level of power enterprises; 3. optimizing the production process, reducing energy consumption and maintenance costs, thereby reducing the operating costs of power enterprises.

[0004] At present, the whole process management of power grid production technical transformation and overhaul projects still relies mainly on manual work. There are problems such as lack of basis for management decisions, inaccurate basis for judgment, incomplete budget preparation, large deviation from reality, poor coordination of construction process, and low economic benefits of projects caused by subjective factors such as omissions and omissions in calculations, insufficient understanding of technical and economic management, and insufficient means. In order to solve the above problems, it is necessary to develop a technical and economic analysis method for power grid production technical transformation and overhaul. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a technical and economic analysis method for power grid production technical transformation and overhaul with fast estimation speed, accurate cost calculation results at each stage and high project economic benefits, which can provide accurate judgment basis for decision-making and improve the economic management level and precise investment level of power companies.

[0006] The object of the present invention is achieved by: a technical and economic analysis method for power grid production technical transformation and overhaul, comprising the following steps: (1) Project estimation: Based on the project plan of the production technology transformation and overhaul project, extract the appropriate estimation indicators to form a project estimation cost expression, compare the project estimation cost expression with the preset estimation indicator database, search the estimation indicator database, find the database estimation cost expression that is closest to the project estimation cost expression, calculate the project estimation cost corresponding to the database estimation cost expression after considering the time overflow, and then obtain the project estimation cost of the production technology transformation and overhaul project; (2) Project budget: Based on the preliminary construction plan of the production technology transformation and overhaul project, first adapt and adjust the various estimation indicators to obtain the budget indicators, and then use the budget indicators to adjust the database estimation cost expression to obtain the project budget cost expression. After calculation, the project budget cost of the production technology transformation and overhaul project is obtained; (3) Project budget: Based on the detailed construction drawings of the production technology transformation and overhaul project, the budget indicators are further adapted and adjusted to obtain the budget indicators. On the basis of the project budget cost expression, the budget indicators are further adapted and adjusted to obtain the project budget cost expression. After calculation, the project budget cost of the production technology transformation and overhaul project is obtained. (4) Project settlement: After the project is completed, the pricing method is selected based on the bidding documents of the production technology transformation and overhaul project, and the latest list price is used as the settlement indicator. The design errors of the construction drawings are comprehensively considered, and the project budget cost expression is recalculated to obtain the project settlement cost of the production technology transformation and overhaul project; (5) On the basis of project settlement cost < project budget cost < project rough estimate cost < project estimated cost, the project settlement cost of the production technical transformation and overhaul project is formed into a new database estimated cost expression and written into the preset estimation indicator database.

[0007] Preferably, the estimation indicators include the main project name, multiple first-level sub-project names and multiple second-level sub-project names and their details, the second-level sub-project names include personnel, materials and maintenance categories, wherein the personnel detail indicators include the number of people, types of work, working hours and working hour pricing, wherein the material details include various types of consumables, lines and their line accessories, and wherein the maintenance category details include major repairs, medium repairs and minor repairs.

[0008] Preferably, the cost expression is presented in an EXECL table, various calculation indicators are input into the EXECL table, and the calculation is completed using an automatic summation formula, and the sum obtained is the cost of various items corresponding to various cost expressions.

[0009] Preferably, the search for the estimation index database is specifically divided into three steps: the first step is to search the main project name, find the n1 database main project names that are most similar to the estimation index main project name, and arrange them in order according to the similarity to give a search result one; the second step is to search for the multiple first-level sub-project names of the search result one of the first step in turn, find the n2 database main project names that are most similar to the first-level sub-project name of the estimation index, and arrange them in order from most to least according to the similarity to give a search result two; the third step is to search for the multiple second-level sub-project names of the search result two of the second step in turn, find the database main project name that is most similar to the estimation index second-level sub-project name and its details, confirm that the database estimated cost expression corresponding to the database main project name is the searched project estimated cost expression, and quickly confirm that the project estimated cost corresponding to the database estimated cost expression is the project estimated cost of the production technical transformation and overhaul project being searched.

[0010] Preferably, the database estimated cost expression corresponding to the database main project name that is similar in number to the secondary sub-project name and its details of the estimated indicator is selected as the project estimated cost expression of the searched production technical transformation and overhaul project.

[0011] Preferably, the main project names, the names of each first-level sub-project, the names of each second-level sub-project and their details in the estimation index database are uniformly compiled according to general industry standards, and the estimation indicators, preliminary estimate indicators, budget indicators, settlement indicators and the corresponding main project names, the names of each first-level sub-project, the names of each second-level sub-project and their details are uniformly compiled according to general industry standards on the basis of the estimation index database.

[0012] Preferably, when the project budget cost is greater than the project estimated cost, return and reasonably modify the preliminary construction plan, recalculate the project budget cost, until the project budget cost is less than the project estimated cost. If this cannot be accomplished, return and reasonably modify the project plan, and recalculate the project estimated cost. Similarly, when the project budget cost is greater than the project budget cost, return and reasonably modify the detailed construction drawings, until the project budget cost is less than the project budget cost. If this cannot be accomplished, return and reasonably modify the preliminary construction plan, recalculate the project budget cost. If this still cannot be accomplished, return and reasonably modify the project plan, and recalculate the project estimated cost.

[0013] Due to the adoption of the above technical solution, the beneficial effects of the present invention are: (1) The present invention uses an estimation index database that has been verified in practice. By fully searching the estimation index database, the database estimation cost expression that is most suitable for the estimation cost expression of the production technical transformation and overhaul project is found. Then, the database estimation cost expression is used to not only quickly confirm the project estimation cost of the production technical transformation and overhaul project, but also the confirmed project estimation cost is accurate and well-founded, which can provide an accurate judgment basis for decision-making; (2) The present invention obtains appropriate estimation indicators, rough estimate indicators, budget indicators and settlement indicators based on the project plan, preliminary construction plan, detailed construction drawings and bidding documents of the production technology transformation and overhaul project, which are used as the calculation basis for the project estimated cost, project rough estimate cost, project budget cost and project settlement cost, respectively. It can improve the accuracy of the cost calculation results of each stage, and also improve the good coordination degree between the construction processes, thereby improving the technical and economic management level of the production technology transformation and overhaul project; (3) Based on the principle that project settlement cost < project budget cost < project rough estimate cost < project estimated cost, the present invention enriches the preset estimation index database with appropriate actual cases of production technical transformation and overhaul, and provides a more accurate and sufficient estimation data support basis for subsequent production technical transformation and overhaul projects, thereby realizing lean management and control and improving the precision investment level of power companies; In general, the present invention has the advantages of fast estimation speed, accurate cost calculation results at each stage, and high project economic benefits. It can provide accurate judgment basis for decision-making and improve the economic management level and precise investment level of power companies. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic flow chart of the method of the present invention. DETAILED DESCRIPTION

[0015] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0016] like Figure 1 As shown, the present invention provides a technical and economic analysis method for power grid production technical transformation and overhaul, including the following five steps, providing economic and technical support services for the entire process of the production technical transformation and overhaul project, carrying out technical and economic analysis and support work such as feasibility study estimation and preliminary budget estimate according to the project progress, reasonably proposing modification suggestions, timely correcting and adjusting, and improving the precise investment level of power companies.

[0017] Step 1: Project estimation. Based on the project plan of the production technical transformation and overhaul project, extract the appropriate estimation indicators to form a project estimation cost expression. Compare the project estimation cost expression with the preset estimation indicator database, search the estimation indicator database, find the database estimation cost expression that is closest to the project estimation cost expression, and calculate the project estimation cost corresponding to the database estimation cost expression after considering the time overflow, which is the project estimation cost of the production technical transformation and overhaul project.

[0018] Among them, the estimated indicators include the main project name, multiple first-level sub-project names and multiple second-level sub-project names and their details. The second-level sub-project names include personnel, materials and maintenance categories. The personnel detail indicators include the number of people, types of work, working hours and working hour pricing. The material details include various consumables, lines and their line accessories. The maintenance category details include major repairs, medium repairs and minor repairs.

[0019] Among them, the cost expression is presented in an EXECL table. Various calculation indicators are entered in the EXECL table, and the automatic summation formula is used to complete the calculation. The sum obtained is the cost of various projects corresponding to various cost expressions.

[0020] Among them, searching the estimation index database is specifically divided into three steps: the first step is to search the main project name, and find the n1 database main project names that are most similar to the estimation index main project name. n1 is generally 5 to 10, and they are arranged in order of similarity to give the search result one; the second step is to search for the search result one of the first step in turn, and find the n2 database main project names that are most similar to the first-level sub-project name of the estimation index. n2 is generally 3 to 6, and they are arranged in order from most to least according to the similarity to give the search result two; the third step is to search for the search result two of the second step in turn, and find the database main project name that is most similar to the estimation index second-level sub-project name and its details, and confirm that the database estimated cost expression corresponding to the database main project name is the searched project estimated cost expression, and quickly confirm that the project estimated cost corresponding to the database estimated cost expression is the project estimated cost of the production technical transformation and overhaul project being searched.

[0021] Among them, the database estimated cost expression corresponding to the database main project name that is similar to the secondary sub-project name and its details in number is preferably selected as the project estimated cost expression of the searched production technical transformation and overhaul project, so as to facilitate the estimation and control of the budget.

[0022] During the specific implementation, the main project names, first-level sub-project names, second-level sub-project names and their details in the estimation index database are uniformly compiled according to the general industry standards. The estimation indicators, preliminary estimate indicators, budget indicators, settlement indicators and the corresponding main project names, first-level sub-project names, second-level sub-project names and their details are uniformly compiled according to the general industry standards based on the estimation index database.

[0023] Step 2: Project budget. Based on the preliminary construction plan of the production technical transformation and overhaul project, first adapt and adjust the estimation indicators to obtain the budget indicators, and then use the budget indicators to adjust the database estimation cost expression to obtain the project budget cost expression. After calculation, the project budget cost of the production technical transformation and overhaul project is obtained.

[0024] When the project budget cost is greater than the project estimated cost, return and reasonably modify the preliminary construction plan, and recalculate the project budget cost until the project budget cost is less than the project estimated cost. If this cannot be achieved, return and reasonably modify the project plan, and recalculate the project estimated cost.

[0025] Step three, project budget, based on the detailed construction drawings of the production technical transformation and overhaul project, further adapt and adjust the budget indicators to obtain the budget indicators. On the basis of the project budget cost expression, the budget indicators are further adapted and adjusted to obtain the project budget cost expression. After calculation, the project budget cost of the production technical transformation and overhaul project is obtained.

[0026] When the project budget cost is greater than the project estimated cost, return and reasonably modify the detailed construction drawings until the project budget cost is less than the project estimated cost. If this cannot be achieved, return and reasonably modify the preliminary construction plan and recalculate the project estimated cost. If this still cannot be achieved, return and reasonably modify the project plan and recalculate the project estimated cost.

[0027] Step 4: Project settlement. After the project is completed, the pricing method is selected based on the bidding documents of the production technical transformation and overhaul project. The latest list pricing is used as the settlement indicator. The design errors of the construction drawings are comprehensively considered, and the project budget cost expression is recalculated to obtain the project settlement cost of the production technical transformation and overhaul project.

[0028] During this period, the pricing method of the bidding documents will be strictly controlled so that the bidding price shall not be higher than the budget price, so as to achieve better technical and economic benefits.

[0029] Step five, on the basis of project settlement cost < project budget cost < project rough estimate cost < project estimated cost, the project settlement cost of the production technical transformation and overhaul project is formed into a new database estimated cost expression, which is written into the preset estimation indicator database to improve the data support for the later estimated cost.

[0030] In the actual production technical transformation and overhaul process, excellent technical and economic project cases that have achieved good economic benefits will be selected to supplement and enrich the estimation index database, which will be conducive to the smooth development of subsequent technical transformation and overhaul work of the power grid.

[0031] The present invention adopts the above five steps to carry out technical and economic management of the whole process for each production technical transformation and overhaul project, so as to ensure the maximization of the economic benefits of the technical transformation and overhaul work and promote the sustainable and healthy development of the power enterprise.

[0032] In summary, the present invention is to strengthen the economic and technical management level of production technical transformation and overhaul projects, optimize economic and technical plans, and quickly obtain project estimated costs based on a preset estimation indicator database summarized from practical work. In the later stage, on the basis of further refining the project work content, further obtain the estimated cost, budget and settlement cost, reasonably control the construction cost, control the estimated cost according to the estimate, control the budget according to the estimate, control the settlement according to the budget, realize lean management and control and precise investment, and further improve the construction of a standardized management system for production technical transformation and overhaul projects.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific implementation modes of the present invention can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A technical and economic analysis method for power grid production technical transformation and overhaul, characterized in that: The steps include: (1) Project estimation: Based on the project plan of the production technology transformation and overhaul project, extract the appropriate estimation indicators to form a project estimation cost expression, compare the project estimation cost expression with the preset estimation indicator database, search the estimation indicator database, find the database estimation cost expression that is closest to the project estimation cost expression, calculate the project estimation cost corresponding to the database estimation cost expression after considering the time overflow, and then obtain the project estimation cost of the production technology transformation and overhaul project; (2) Project budget: Based on the preliminary construction plan of the production technology transformation and overhaul project, first adapt and adjust the various estimation indicators to obtain the budget indicators, and then use the budget indicators to adjust the database estimation cost expression to obtain the project budget cost expression. After calculation, the project budget cost of the production technology transformation and overhaul project is obtained; (3) Project budget: Based on the detailed construction drawings of the production technology transformation and overhaul project, the budget indicators are further adapted and adjusted to obtain the budget indicators. On the basis of the project budget cost expression, the budget indicators are further adapted and adjusted to obtain the project budget cost expression. After calculation, the project budget cost of the production technology transformation and overhaul project is obtained. (4) Project settlement: After the project is completed, the pricing method is selected based on the bidding documents of the production technology transformation and overhaul project, and the latest list price is used as the settlement indicator. The design errors of the construction drawings are comprehensively considered, and the project budget cost expression is recalculated to obtain the project settlement cost of the production technology transformation and overhaul project; (5) On the basis of project settlement cost < project budget cost < project rough estimate cost < project estimated cost, the project settlement cost of the production technical transformation and overhaul project is formed into a new database estimated cost expression and written into the preset estimation indicator database.

2. The technical and economic analysis method for power grid production technical transformation and overhaul according to claim 1 is characterized by: The estimated indicators include the main project name, multiple first-level sub-project names and multiple second-level sub-project names and their details. The second-level sub-project names include personnel, materials and maintenance categories, among which the personnel detail indicators include the number of people, types of work, working hours and working hour pricing, among which the material details include various consumables, lines and their line accessories, and the maintenance category details include major repairs, medium repairs and minor repairs.

3. The technical and economic analysis method for power grid production technical transformation and overhaul according to claim 2 is characterized by: The cost expression is presented in an EXECL table. Various calculation indicators are input into the EXECL table, and the calculation is completed using an automatic summation formula. The sum obtained is the cost of various items corresponding to various cost expressions.

4. The technical and economic analysis method for power grid production technical transformation and overhaul according to claim 2 is characterized in that: The search for the estimation index database is specifically divided into three steps: the first step is to search the main project name, find the n1 database main project names that are most similar to the estimation index main project name, and arrange them in order of similarity to give search result one; the second step is to search for multiple first-level sub-project names in turn for the search result one of the first step, find the n2 database main project names that are most similar to the first-level sub-project name of the estimation index, and arrange them in order from most to least according to the similarity to give search result two; the third step is to search for multiple second-level sub-project names in turn for the search result two of the second step, find the database main project name that is most similar to the estimation index second-level sub-project name and its details, confirm that the database estimated cost expression corresponding to the database main project name is the searched project estimated cost expression, and quickly confirm that the project estimated cost corresponding to the database estimated cost expression is the project estimated cost of the production technical transformation and overhaul project being searched.

5. The technical and economic analysis method for power grid production technical transformation and overhaul according to claim 4 is characterized by: The database estimated cost expression corresponding to the database main project name that is similar to the secondary sub-project name and its details in number to the estimated indicator is selected as the project estimated cost expression of the searched production technical transformation and overhaul project.

6. The technical and economic analysis method for power grid production technical transformation and overhaul according to claim 2 is characterized by: The main project names, first-level sub-project names, second-level sub-project names and their details in the estimation index database are uniformly compiled in accordance with general industry standards. The estimation indicators, preliminary estimate indicators, budget indicators, settlement indicators and the corresponding main project names, first-level sub-project names, second-level sub-project names and their details are uniformly compiled in accordance with general industry standards based on the estimation index database.

7. The technical and economic analysis method for power grid production technical transformation and overhaul according to claim 1 is characterized by: When the project budget cost is greater than the project estimated cost, return and reasonably modify the preliminary construction plan, recalculate the project budget cost, until the project budget cost is less than the project estimated cost. If this cannot be completed, return and reasonably modify the project plan, and recalculate the project estimated cost. Similarly, when the project budget cost is greater than the project budget cost, return and reasonably modify the detailed construction drawings, until the project budget cost is less than the project budget cost. If this cannot be completed, return and reasonably modify the preliminary construction plan, recalculate the project budget cost. If this still cannot be completed, return and reasonably modify the project plan, and recalculate the project estimated cost.

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