Power distribution network project cost examination method and system, and medium

Abstract

The invention relates to a power distribution network project cost review method and system and a medium, and the method comprises the following steps: obtaining cost data of a to-be-reviewed power distribution network project, and substituting the cost data into a power distribution network project cost comprehensive index calculation model for calculation, the power distribution network project cost comprehensive index calculation model comprises a building engineering cost calculation module and an installation engineering cost calculation module, the building engineering cost calculation module and the installation engineering cost calculation module are constructed based on corresponding cost systems, and each cost system comprises a plurality of cost projects arranged step by step and corresponding cost sources and rates; the power distribution network project cost comprehensive index obtained through calculation is compared with data in a power distribution network project cost resource management library, and a power distribution network project cost review result is obtained; the power distribution network project cost resource management library comprises a cost case sub-library, a general cost sub-library and a technical and economic knowledge sub-library. Compared with the prior art, standardized and lean management of the project cost can be realized, and the project investment benefit is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of data analysis, and in particular relates to a method, system and medium for reviewing the cost of a distribution network project. Background Art

[0002] Cost control is a crucial component of distribution network project construction management. Traditionally, cost tracking and control for distribution network projects relies on regular cost reporting and audit processes, along with feasibility studies and preliminary design reviews to verify project cost compliance and rationality. With the advancement of informatization, some organizations have begun utilizing big data analytics to deeply mine and analyze cost data to improve review efficiency and fairness. Through methods such as correlation analysis and trend forecasting, these methods reveal cost structure and trends, optimizing cost strategies. However, existing methods still suffer from issues such as a single data dimension and insufficient data accuracy. For example, traditional data management methods often focus solely on direct costs, such as material and labor costs, while ignoring indirect costs and administrative expenses. Furthermore, the varying technical and economic capabilities of project management and design organizations, coupled with inconsistent formats and standards for submitted data, lead to widespread inaccuracies in project budgets. These issues contribute to the difficulty of reviewing distribution network project costs.

[0003] Therefore, it is necessary to design a new distribution network project cost review plan to improve the standardization and lean management level of distribution network project engineering cost, improve the investment efficiency of the project, further improve the efficiency and benefits of technical and economic work, and realize technical and economic management innovation. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a distribution network project cost review method, system and medium to achieve standardized and lean management of project costs and improve project investment efficiency.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] The present invention provides a method for reviewing the cost of a distribution network project, comprising the following steps:

[0007] Obtaining cost data of the distribution network project to be reviewed and substituting it into a comprehensive cost index calculation model for distribution network project cost, wherein the comprehensive cost index calculation model includes a construction project cost calculation module and an installation project cost calculation module, wherein the construction project cost calculation module and the installation project cost calculation module are respectively constructed based on corresponding cost systems, and each cost system includes multiple cost items arranged in a hierarchical manner and their corresponding cost sources and rates;

[0008] The calculated comprehensive indicators of distribution network project cost are compared with the data in the distribution network project cost resource management library to obtain the distribution network project cost review results; the distribution network project cost resource management library includes a cost case sub-library constructed based on historical distribution network project cost cases, a general cost sub-library constructed based on cost standard data, and a technical and economic knowledge sub-library constructed based on technical and economic related literature resources.

[0009] Furthermore, the cost systems of the construction project cost calculation module and the installation project cost calculation module both include the following cost items: direct costs, indirect costs, profits, price differences in the preparation base period, value-added tax and comprehensive costs. The direct costs include direct project costs and measures costs, and the indirect costs include regulatory fees and enterprise management fees.

[0010] Furthermore, the direct construction costs include labor costs, material costs and construction machinery usage fees, the measures fees include additional construction costs in the winter and rainy seasons, additional construction costs at night, construction tool usage fees, additional construction costs in special areas and safe and civilized construction fees, the regulatory fees include social insurance premiums and housing provident funds, and the price difference for the preparation of the base period includes the labor cost price difference, material cost price difference and machinery cost price difference.

[0011] Furthermore, the construction cost system of the construction project cost calculation module also includes the following cost items: equipment fees supplied by Party B and equipment fees supplied by Party A.

[0012] Furthermore, the equipment fee supplied by Party B includes the equipment fee supplied by Party B including tax, the transportation fee of the equipment supplied by Party B including tax, and the delivery fee of the equipment supplied by Party B including tax.

[0013] Furthermore, text parsing technology is used to extract corresponding distribution network project cost review index parameters from the cost data of the distribution network project to be reviewed and the distribution network project cost resource management library to assist in generating the distribution network project cost review results.

[0014] Furthermore, the distribution network project cost review index parameters include voltage level, substation type, general design scheme, main transformer capacity, number of outgoing line loops, line length, number of conductor splits and conductor cross-sectional area.

[0015] Furthermore, the price trend of the cost items involved in the comprehensive indicator calculation model of the distribution network project cost is predicted by a machine learning model, and a post-project evaluation is performed through a sensitivity analysis method to assist in the generation of the distribution network project cost review results.

[0016] The present invention also provides a distribution network project cost review system, comprising a data acquisition module, a distribution network project cost comprehensive index calculation module, a distribution network project cost resource management library and a distribution network project cost review result generation module;

[0017] Wherein, the data acquisition module is used to acquire and store the cost data of the power distribution network project to be reviewed;

[0018] The distribution network project cost comprehensive index calculation module is used to substitute the data in the data acquisition module into the distribution network project cost comprehensive index calculation model to calculate the distribution network project cost comprehensive index. The distribution network project cost comprehensive index calculation model includes a construction project cost calculation module and an installation project cost calculation module. The construction project cost calculation module and the installation project cost calculation module are respectively constructed based on corresponding cost systems. Each cost system includes multiple cost items arranged in a hierarchical manner and their corresponding cost sources and rates.

[0019] The distribution network project cost resource management library includes a cost case sub-library constructed based on historical distribution network project cost cases, a general cost sub-library constructed based on cost standard data, and a technical and economic knowledge sub-library constructed based on technical and economic related literature resources;

[0020] The distribution network project cost review result generation module is used to compare the distribution network project cost comprehensive index with the data in the distribution network project cost resource management library to obtain the distribution network project cost review result.

[0021] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the program implements the above method when executed by a processor.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention proposes a method for reviewing the cost of a distribution network project. First, the cost data of the distribution network project to be reviewed is substituted into a comprehensive index calculation model for the distribution network project cost for calculation. The comprehensive index calculation model for the distribution network project cost includes a construction project cost calculation module and an installation project cost calculation module, both of which are constructed based on corresponding cost systems. Each cost system includes multiple cost items arranged in a hierarchical manner and their corresponding cost sources and rates, which helps to improve the standardization and comprehensiveness of the data and ensure the reliability of the subsequent review results. Then, the calculated comprehensive index of the distribution network project cost is compared with the data in the distribution network project cost resource management library. The distribution network project cost resource management library includes a cost case sub-library constructed based on historical distribution network project cost cases, a general cost sub-library constructed based on cost standard data, and a technical and economic knowledge sub-library constructed based on technical and economic literature resources. Through the above method, accurate and reliable distribution network project cost review results can be obtained fairly and efficiently, further promoting the development of engineering project cost data management, cost control and other work towards efficiency, leanness and standardization.

[0024] 2. In addition to direct costs, the present invention also takes into account indirect costs in the construction cost system, including regulatory fees and enterprise management fees, which can effectively avoid the problem of single data dimension, further improve the standardization and comprehensiveness of the data, and ensure the scientific nature of the subsequent review results.

[0025] 3. The present invention uses a machine learning model to predict the price trends of the cost items involved in the comprehensive indicator calculation model of the distribution network project cost, and uses a sensitivity analysis method to conduct post-project evaluation, thereby assisting in the generation of distribution network project cost review results, and can evaluate the distribution network project from a long-term development perspective. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Flowchart of the method of the present invention. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0028] Example 1

[0029] This embodiment provides a method for reviewing the cost of a distribution network project. Figure 1 As shown, the following steps are included:

[0030] S1. Construct a comprehensive indicator calculation model for distribution network project costs.

[0031] The comprehensive indicator calculation model for distribution network project costs includes a construction project cost calculation module and an installation project cost calculation module. Both modules are based on corresponding cost cost systems. Each cost cost system includes multiple cost items arranged in a hierarchical manner and their corresponding cost sources and rates. The specific components are as follows:

[0032] (1) Construction project cost calculation module

[0033] Construction project cost = direct cost + indirect cost + profit + price difference of preparation base period + equipment fee supplied by Party B (excluding tax) + value-added tax + equipment fee supplied by Party A (including tax) + comprehensive cost * 100%. The details of each item are shown in Table 1.

[0034] Table 1 Details of construction project costs

[0035]

[0036]

[0037] (2) Installation project cost calculation module

[0038] Installation project cost = direct cost + indirect cost + profit + price difference of preparation base period + value-added tax + comprehensive cost * 100%. The details of each item are shown in Table 2.

[0039] Table 2 Installation project cost details

[0040]

[0041] S2. Obtain the cost data of the distribution network project to be reviewed and substitute it into the comprehensive indicator calculation model for the distribution network project cost for calculation.

[0042] The data sources of the construction project cost calculation module and the installation project cost calculation module are shown in Table 3 and Table 4 respectively.

[0043] Table 3 Data sources for the construction project cost calculation module

[0044]

[0045] Table 4 Data sources for the installation engineering cost calculation module

[0046]

[0047]

[0048] S3. Compare the calculated comprehensive indicators of the distribution network project cost with the data in the distribution network project cost resource management library to obtain the distribution network project cost review results.

[0049] The distribution network project cost resource management database includes a cost case sub-database, a general cost sub-database, and a technical and economic knowledge sub-database. Among them, the cost case sub-database mainly contains historical distribution network project cost cases, covering content such as dispute focus, case background, dispute analysis, processing results, and risk warnings; the general cost sub-database mainly contains cost standard data, and realizes the general cost data of the two versions of the 06 / 13 preliminary regulations, including 163 schemes and more than 450 modules; the technical and economic knowledge sub-database mainly contains technical and economic related literature resources, and supports both query and retrieval.

[0050] Text parsing technology is used to extract corresponding distribution network project cost review index parameters from the cost data of the distribution network project to be reviewed and the distribution network project cost resource management library to assist in the generation of distribution network project cost review results. The distribution network project cost review index parameters include voltage level, substation type, general design scheme, main transformer capacity, number of outgoing line loops, line length, number of conductor splits and conductor cross-sectional area.

[0051] In a preferred embodiment, a machine learning model is used to predict the price trends of cost items involved in the calculation model of the comprehensive index of the distribution network project cost, and a sensitivity analysis method is used to conduct a post-project evaluation to assist in the generation of the distribution network project cost review results, so that the distribution network project can be evaluated from a long-term development perspective.

[0052] Example 2

[0053] This embodiment provides a distribution network project cost review system that can implement the method proposed in Example 1. The system includes a data acquisition module, a distribution network project cost comprehensive index calculation module, a distribution network project cost resource management library, and a distribution network project cost review result generation module.

[0054] The data acquisition module is used to acquire and store the cost data of the distribution network projects to be reviewed, group individual projects by project, and realize standardized storage of cost data (including project feasibility study estimate data, preliminary design estimate data, construction drawing budget data, project settlement data, financial final settlement data, and cost analysis data) by defining key attributes of projects and projects, and combining project codes, engineering codes, etc. At the same time, the review process data is automatically grouped by project and engineering dimensions, and the data acquisition module is intelligently reviewed and verified based on the sorted standardized logical rules.

[0055] The distribution network project cost comprehensive index calculation module is used to substitute the data in the data acquisition module into the distribution network project cost comprehensive index calculation model to calculate the distribution network project cost comprehensive index.

[0056] The distribution network project cost resource management database includes a cost case sub-database built based on historical distribution network project cost cases, a general cost sub-database built based on cost standard data, and a technical and economic knowledge sub-database built based on technical and economic related literature resources.

[0057] The distribution network project cost review result generation module is used to compare the comprehensive cost indicators of the distribution network project with the data in the distribution network project cost resource management library to obtain the distribution network project cost review results. This module includes but is not limited to the following functions:

[0058] 1) Cost Analysis: This primarily involves cost level analysis, report generation, outline configuration, cost data template configuration, and automatic data verification. Based on intelligent extraction of cost analysis data, this system uses machine-assisted manual analysis and pre-installed report templates to quickly and accurately output established results. This system provides cost analysis, comparison, and output at different levels and granularity for technical and economic indicators at each stage of the project.

[0059] 2) Auxiliary review: Mainly relying on the general cost of State Grid and historical typical case projects, combined with key indicator parameters of project review, such as construction and management units, voltage levels, substation types, general design schemes, main transformer capacity, number of outgoing line loops, line length, number of conductor splits, conductor cross-sectional area, etc., to achieve analysis and diagnosis of project cost indicators. Among them, the key cost indicator parameters are mainly automatically extracted and analyzed by the technical and economic indicator tables and project overviews in the collected project cost documents. Through the screening of key project parameter information, firstly, it supports the comparative analysis of the mean and median of key cost indicators such as the four major expenses and project legal person management fees, construction site requisition fees, etc. between the project to be diagnosed and the reference project; secondly, it supports the comparative analysis of the second-level costs of the tables of different stages (estimate, general, preliminary, and final) of the project to be diagnosed; thirdly, it supports the comparative analysis of the third-level costs of the tables of the same stage of the project to be diagnosed and the reference project, supporting the Institute of Economic Research to carry out comparative analysis of cost expenses and assisting in project review and cost analysis.

[0060] 3) Cost Forecasting: This primarily utilizes algorithmic forecasting models to predict equipment and material prices, intelligently calculating price trends. This guides the calculation of equipment and material prices during feasibility studies and preliminary design stages of comprehensive cost management for power grid projects, further improving the accuracy of estimates and budgets. It also provides price trends for equipment and materials over the next period, facilitating the scientific determination of tender quantities, rationally reducing the company's equipment and material procurement costs, and mitigating project investment risks.

[0061] 4) Technical solution comparison and selection: mainly includes multi-level data analysis, comprehensive evaluation from point to surface, and comprehensive evaluation and comparison of system and overall solutions; based on the long-term economic benefits of the project, the optimal solution is identified to achieve full life cycle cost analysis and evaluation to maximize the overall benefits of the whole life cycle; multiple data analysis and calculation models, intelligent comparison technology, and comparison of material and equipment units / systems for the most economically optimal solution.

[0062] 5) Post-project evaluation: mainly through the use of economic evaluation and sensitivity analysis methods to determine whether the goals, effects and benefits of the construction plan have been achieved, summarize the reasons for the success or failure of the project and the lessons learned, provide timely and effective feedback, and improve the management level of future new project decision-making and investment.

[0063] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention, without departing from the scope of the present invention, should be within the scope of protection of the present invention.

Claims

1. A method for reviewing the cost of a distribution network project, characterized in that: The following steps are involved: Obtaining cost data of the distribution network project to be reviewed and substituting it into a comprehensive cost index calculation model for distribution network project cost, wherein the comprehensive cost index calculation model includes a construction project cost calculation module and an installation project cost calculation module, wherein the construction project cost calculation module and the installation project cost calculation module are respectively constructed based on corresponding cost systems, and each cost system includes multiple cost items arranged in a hierarchical manner and their corresponding cost sources and rates; The calculated comprehensive indicators of distribution network project cost are compared with the data in the distribution network project cost resource management library to obtain the distribution network project cost review results; the distribution network project cost resource management library includes a cost case sub-library constructed based on historical distribution network project cost cases, a general cost sub-library constructed based on cost standard data, and a technical and economic knowledge sub-library constructed based on technical and economic related literature resources.

2. A method for reviewing the cost of a distribution network project according to claim 1, characterized in that: The cost systems of the construction project cost calculation module and the installation project cost calculation module both include the following cost items: direct costs, indirect costs, profits, price differences in the preparation base period, value-added tax and comprehensive costs. The direct costs include direct engineering costs and measures costs, and the indirect costs include regulatory fees and enterprise management fees.

3. A method for reviewing the cost of a distribution network project according to claim 2, characterized in that: The direct construction costs include labor costs, material costs and construction machinery usage fees; the measures fees include additional construction costs in the winter and rainy seasons, additional construction costs at night, construction tool usage fees, additional construction costs in special areas and safe and civilized construction fees; the regulatory fees include social insurance premiums and housing provident funds; the price difference for the compilation base period includes the labor cost price difference, material cost price difference and machinery cost price difference.

4. A method for reviewing the cost of a distribution network project according to claim 2, characterized in that: The construction cost system of the construction project cost calculation module also includes the following cost items: equipment fees supplied by Party B and equipment fees supplied by Party A.

5. A method for reviewing the cost of a distribution network project according to claim 4, characterized in that: The said equipment supply fee includes the equipment supply fee including tax, the transportation fee of the equipment supply including tax and the delivery fee of the equipment supply including tax.

6. A method for reviewing the cost of a distribution network project according to claim 1, characterized in that: The text parsing technology is used to extract the corresponding distribution network project cost review index parameters from the cost data of the distribution network project to be reviewed and the distribution network project cost resource management library, so as to assist in the generation of the distribution network project cost review results.

7. A method for reviewing the cost of a distribution network project according to claim 6, characterized in that: The distribution network project cost review index parameters include voltage level, substation type, general design scheme, main transformer capacity, number of outgoing line loops, line length, number of conductor splits and conductor cross-sectional area.

8. A method for reviewing the cost of a distribution network project according to claim 1, characterized in that: The price trends of the cost items involved in the comprehensive indicator calculation model of the distribution network project cost are predicted through a machine learning model, and a post-project evaluation is performed through a sensitivity analysis method to assist in the generation of the distribution network project cost review results.

9. A distribution network project cost review system, characterized in that: It includes data acquisition module, distribution network project cost comprehensive index calculation module, distribution network project cost resource management library and distribution network project cost review result generation module; Wherein, the data acquisition module is used to acquire and store the cost data of the power distribution network project to be reviewed; The distribution network project cost comprehensive index calculation module is used to substitute the data in the data acquisition module into the distribution network project cost comprehensive index calculation model to calculate the distribution network project cost comprehensive index. The distribution network project cost comprehensive index calculation model includes a construction project cost calculation module and an installation project cost calculation module. The construction project cost calculation module and the installation project cost calculation module are respectively constructed based on corresponding cost systems. Each cost system includes multiple cost items arranged in a hierarchical manner and their corresponding cost sources and rates. The distribution network project cost resource management library includes a cost case sub-library constructed based on historical distribution network project cost cases, a general cost sub-library constructed based on cost standard data, and a technical and economic knowledge sub-library constructed based on technical and economic related literature resources; The distribution network project cost review result generation module is used to compare the distribution network project cost comprehensive index with the data in the distribution network project cost resource management library to obtain the distribution network project cost review result.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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