Investment estimation management and control method and system for technical improvement and maintenance project of power grid

Abstract

The invention discloses a power grid technical improvement and maintenance project investment estimation control method and system, and the method comprises the steps: dividing the cost into a fixed cost and a variable cost during project cost budgeting, carrying out the rolling adjustment of the total cost of a project according to the impact of variable factors in the variable cost, and guaranteeing the accuracy of project cost budgeting, meanwhile, the project is divided into a plurality of stages, the cost of the project in different stages is estimated respectively, in the construction process, the project can be managed in stages, the cost can be controlled in stages, and the problem that the cost is difficult to control and adjust in time due to the fact that the total cost is large and the total project amount is large is solved. And the control effect of the investment cost of the power grid technical improvement and maintenance engineering project is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power grid engineering cost, and in particular relates to a method and system for investment estimation and control of power grid technical transformation and maintenance engineering. Background Art

[0002] The power grid technical transformation project is a transformation project implemented for the existing power grid equipment and facilities, such as substations, transmission lines, distribution equipment, etc., by applying new technologies, new processes, new equipment, and new materials to improve the safety, reliability, and economy of the power grid, or to enhance the automation level, energy conservation, and environmental protection level of the power grid;

[0003] Usually, a cost investment estimate is required before the start of a power grid technical transformation project. Usually, the cost investment estimate of a project is based on the data of previous similar projects. During the construction process, various variable factors may cause some costs in the project to change or the project to lag. When a project lags, the cost investment of the project will change accordingly, and the investment cost control effect of the project needs to be further improved. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention proposes a method and system for investment estimation and control of power grid technical transformation and maintenance projects.

[0005] The technical solution of the present invention is as follows:

[0006] A method for estimating and controlling investment in power grid technical renovation and maintenance projects, comprising:

[0007] Obtaining the project cost of the power grid technical transformation and maintenance project, wherein the project cost includes fixed cost and variable cost;

[0008] Divide the power grid technical renovation and maintenance project into several phase projects arranged according to a preset construction period, and obtain the phase cost of each phase project in combination with the project cost;

[0009] Based on the proportion of resources consumed by the current progress of each stage of the project to the total consumed resources, determine whether the resources consumed by the current progress of each stage of the project exceed the safety range;

[0010] Based on the completion time deviation corresponding to the current progress of the project at each stage, estimate the delayed cost of the project at each stage; based on the delayed cost and stage cost of the project at each stage, obtain the cost deviation of the project at each stage, thereby judging whether the current progress cost of the project at each stage exceeds the safety range;

[0011] Based on the balance left over from the previous stage of the project, the cost and resources of the next stage of the project are managed and controlled.

[0012] Furthermore, the expression of the project cost is:

[0013]

[0014] In the formula, TC is the total cost; FC is the fixed cost; VC is the i is the ith variable cost, and n is the total number of variable costs.

[0015] Furthermore, the specific method of dividing the power grid technical renovation and maintenance project into several phase projects arranged with a preset construction period and obtaining the phase cost of each phase project in combination with the project cost includes:

[0016] According to the phased arrangement of the power grid technical renovation and maintenance project, the power grid technical renovation and maintenance project is divided into a number of phase projects, and the several phase projects are arranged according to a preset construction period;

[0017] Set the cost weight of each stage project and calculate the normalized cost weight. The calculation formula of the cost weight is:

[0018]

[0019] In the formula, is the normalized cost weight, w j is the cost weight of the jth stage;

[0020] Based on the normalized cost weights, the settlement cost of each stage project is calculated. For the j-th stage project, the stage cost C j Calculate using the following formula:

[0021]

[0022] Where TC is the project cost.

[0023] Furthermore, the specific steps of judging whether the resources consumed by the current progress of the project at each stage exceed the safety range based on the proportion of the resources consumed by the current progress of the project at each stage to the total consumed resources include:

[0024] Based on the resources consumed by the current progress of the project at each stage and the predicted total resources, calculate the proportion of resources consumed by the current progress of the project at each stage to the total consumed resources. For the jth stage, the proportion of resources consumed by the current progress of the project to the total consumed resources is Q j The calculation formula is as follows:

[0025]

[0026] In the formula, R j The resources consumed by the current progress of the project in the jth stage; R qForecast total resources for phase projects;

[0027] A threshold ratio of resources consumed by the current progress of the project in each stage to the total consumed resources is set. If the ratio is greater than the threshold ratio, the resources consumed by the current progress of the project in this stage are within a safe range; otherwise, the resources consumed by the current progress of the project in this stage are outside the safe range, and the causes of the abnormal consumption of the project in this stage are investigated and resources are monitored.

[0028] Furthermore, the specific steps of estimating the delay cost of each stage of the project based on the completion time deviation corresponding to the current progress of each stage of the project include:

[0029] Based on the actual progress rate corresponding to the current progress of each stage of the project, the completion time deviation of each stage of the project is calculated. The completion time deviation ΔT of the j-th stage project is calculated by the following formula:

[0030]

[0031] Where, T p Set a preset construction period for the project; u P is the construction period of the project; j is the actual progress rate of the project;

[0032] Then, based on the completion time deviation corresponding to the current progress of the project in each stage, the delay cost of the project in each stage is calculated. The calculation method of the delay cost of the project in the jth stage is as follows:

[0033]

[0034] In the formula, is the labor cost increased by the delay of the stage project, where i represents the type of work, h i represents the additional man-hours required per day, w i Indicates the corresponding labor cost per unit man-hour; The equipment rental cost increased by the project delay, where a represents the equipment to be rented, r a The unit price for equipment leasing; It represents the material cost increased by the project delay, where l represents the material type and k represents u l is the initial amount of material, p l is the initial price of the unit material, e l is the price growth rate of the material.

[0035] Furthermore, the specific steps of obtaining the cost deviation of the project at each stage based on the delayed cost and stage cost of the project at each stage, and determining whether the current progress cost of the project at each stage exceeds the safety range include:

[0036] Based on the lag cost and stage cost of the project at each stage, the cost deviation of the project at each stage is obtained, and the cost deviation ΔC when the j-th stage project is completed is calculated by the following formula:

[0037] ΔC=C m -(C g +C j )

[0038] In the formula, C m is the stage cost threshold of the j-th stage project.

[0039] Furthermore, the specific steps of controlling the cost and resources of the next stage project based on the balance at the completion of the previous stage project include:

[0040] Get the balance of the previous stage project when it is completed, and the balance of the j-th stage project δ j The method to obtain is as follows:

[0041] δ j =C j -C B

[0042] In the formula, C B is the actual recorded cost in stage j;

[0043] If the balance at the completion of the previous phase of the project is greater than or equal to 0, the same cost control measures will be applied to the next phase of the project;

[0044] If the balance of the previous stage project is less than 0, the cost compression rate will be used to control the cost and resources of the next stage project;

[0045] According to the balance of the previous stage project, the cost compression rate of the next stage project is calculated. For the cost compression rate Q of the j+1 stage project j+1 The calculation formula is as follows:

[0046]

[0047] When the cost compression rate of the next stage project is less than the set cost compression rate threshold, the compression rate is within a reasonable range, and the stage cost is compressed according to the cost compression rate of the next stage project, and the resources of the next stage project are allocated;

[0048] When the cost compression rate of the subsequent stage project is greater than or equal to the set cost compression rate threshold, the compression rate is outside the reasonable range. In this case, the remaining stage costs will be compressed based on the cost overruns of the previous stage project, and the remaining stage costs will be readjusted and allocated.

[0049] A power grid technical renovation and maintenance project investment estimation management and control system, comprising a project cost acquisition module, a stage cost acquisition module, a resource consumption judgment module, a cost judgment module and a management and control module;

[0050] The project cost acquisition module is used to acquire the project cost of the power grid technical transformation and maintenance project, and the project cost includes fixed cost and variable cost;

[0051] The stage cost acquisition module is used to divide the power grid technical renovation and maintenance project into several stage projects arranged according to a preset construction period, and obtain the stage cost of each stage project in combination with the project cost;

[0052] The resource consumption judgment module is used to judge whether the resources consumed by the current progress of the project at each stage exceed the safety range based on the proportion of the resources consumed by the current progress of the project at each stage to the total consumed resources;

[0053] The cost judgment module is used to estimate the delayed cost of each stage project based on the completion time deviation corresponding to the current progress of each stage project; based on the delayed cost and stage cost of each stage project, obtain the cost deviation of each stage project, thereby judging whether the current progress cost of each stage project exceeds the safety range;

[0054] The control module is used to control the cost and resources of the next stage project based on the balance at the completion of the previous stage project.

[0055] 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.

[0056] 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.

[0057] Compared with the prior art, the present invention has the following beneficial effects:

[0058] The present invention proposes a method and system for investment estimation and control of power grid technical transformation and maintenance projects. The method divides the cost into fixed cost and variable cost when budgeting the project cost, and performs rolling adjustment on the total cost of the project according to the influence of variable factors in the variable cost, so as to ensure the accuracy of the project cost budget. At the same time, the project is divided into several stages, and the cost of the project in different stages is estimated separately. During the construction process, the project can be managed in stages and the cost can be controlled in sections, so as to avoid the difficulty in cost control and timely adjustment due to large total cost and large total engineering volume, and improve the control effect of the investment cost of power grid technical transformation and maintenance projects.

[0059] The present invention calculates the actual resource consumption of the project through the real-time construction progress of the project, and timely controls and adjusts the abnormal resource consumption through the deviation of the project's resource consumption to ensure the reasonable planning of resources. At the same time, by calculating and analyzing the actual progress of the project, the completion time deviation of the phased project is calculated to predict whether the phased project can be completed on schedule. For the delayed phased projects, timely prompts are given and analysis and control are performed to avoid the phased projects from being delayed again. The cost of the phased project is predicted, the cost deviation is estimated, and the resources are adjusted and planned in time to ensure that the cost is within a safe range. When the phased project is completed, the project balance is calculated and analyzed. For the phased project with overspending, corresponding treatment measures are taken to ensure that the total project cost is controllable and reduce the risk of cost estimation. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 It is a flow chart of the method for estimating and controlling the investment in power grid technical renovation and maintenance projects in the embodiment. DETAILED DESCRIPTION

[0061] 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.

[0062] Embodiment 1:

[0063] A method for estimating and controlling investment in power grid technical renovation and maintenance projects according to the present invention is as follows: Figure 1 As shown, the specific steps are as follows:

[0064] S1. Store the design plan of the power grid technical transformation project in the database; the design plan of the power grid technical transformation project includes data information such as basic project information, technical plan, and construction plan. Among them, the basic information of the project includes information such as the project name, background, and description. The technical plan includes information on the type of equipment to be transformed, the type of new equipment to be replaced, the power grid topology transformation design drawing, and the comparison of topology changes before and after the transformation. The construction plan includes information such as the total construction period, project start date, completion date, and phased progress plan.

[0065] S2. Obtain the project cost of the power grid technical transformation and maintenance project, which includes fixed cost and variable cost;

[0066] S3. Divide the power grid technical renovation and maintenance project into several phases arranged according to the preset construction period, and obtain the phase cost of each phase of the project in combination with the project cost;

[0067] S4. Based on the proportion of resources consumed by the current progress of each stage of the project to the total consumed resources, determine whether the resources consumed by the current progress of each stage of the project exceeds the safety range;

[0068] S5. Estimate the delayed cost of each stage of the project based on the completion time deviation corresponding to the current progress of the project at each stage; obtain the cost deviation of each stage of the project based on the delayed cost and stage cost of each stage of the project, and judge whether the current progress cost of each stage of the project exceeds the safety range;

[0069] S6. Based on the balance at the completion of the previous stage of the project, control the cost and resources of the next stage of the project.

[0070] Embodiment 2:

[0071] This embodiment is further designed on the basis of the first embodiment in that the expression of the project cost in this embodiment is:

[0072]

[0073] In the formula, TC is the total cost; FC is the fixed cost, which is a fixed value; VC i is the ith variable cost, n is the total number of variable costs, which vary with project progress, market changes and other factors, n means that the variable cost consists of n parts, VC 1 ,VC 2 ,...,VC n are the cost values ​​of n parts, VC 1 ,VC 2 ,...,VC n It will vary with project progress, market price and other factors.

[0074] Embodiment three:

[0075] This embodiment is further designed on the basis of the second embodiment in that in this embodiment, the power grid technical renovation and maintenance project is divided into several phase projects arranged according to a preset construction period, and the specific method of obtaining the phase cost of each phase project in combination with the project cost includes:

[0076] According to the phased arrangement of the power grid technical renovation and maintenance project (preset construction period and construction plan arrangement), the power grid technical renovation and maintenance project is divided into several phase projects, and the several phase projects are arranged according to the preset construction period;

[0077] Set the cost weight of the project at each stage and calculate the normalized cost weight. The calculation formula of the cost weight is:

[0078]

[0079] In the formula, is the normalized cost weight, w j is the cost weight of the jth stage;

[0080] Based on the normalized cost weights, the settlement cost of each stage project is calculated. For the jth stage project, the stage cost C j Calculate using the following formula:

[0081]

[0082] Where TC is the project cost.

[0083] Embodiment 4:

[0084] This embodiment is further designed on the basis of the third embodiment in that, in this embodiment, based on the proportion of resources consumed by the current progress of each stage of the project to the total consumed resources, the specific steps of determining whether the resources consumed by the current progress of each stage of the project exceed the safety range include:

[0085] Based on the resources consumed by the current progress of the project at each stage and the predicted total resources, calculate the proportion of resources consumed by the current progress of the project at each stage to the total consumed resources. For the jth stage, the proportion of resources consumed by the current progress of the project to the total consumed resources is Q j The calculation formula is as follows:

[0086]

[0087] In the formula, R j The resources consumed by the current progress of the project in the jth stage; R q Forecast total resources for phase projects;

[0088] Set a threshold ratio of resources consumed by the current progress of the project in each stage to the total consumed resources. If the ratio of resources consumed by the current progress to the total consumed resources is greater than the threshold ratio of resources consumed by the current progress to the total consumed resources, the resources consumed by the current progress of the project in this stage are within a safe range; otherwise, the resources consumed by the current progress of the project in this stage are outside the safe range, and the causes of the abnormal consumption of the project in this stage are investigated and resources are monitored, and resources are re-planned and adjusted when necessary.

[0089] Embodiment five:

[0090] This embodiment is further designed on the basis of the fourth embodiment in that, in this embodiment, based on the completion time deviation corresponding to the current progress of the project at each stage, the specific steps of estimating the delay cost of the project at each stage include:

[0091] Based on the actual progress rate (the proportion of completed workload to total workload) corresponding to the current progress of each stage of the project, the completion time deviation of each stage of the project is calculated. The completion time deviation ΔT of the j-th stage project is calculated by the following formula:

[0092]

[0093] Where, T p Set a preset construction period for the project; u P is the construction period of the project; j is the actual progress rate of the project;

[0094] When ΔT>0, it means that the project in stage j may be completed first;

[0095] When ΔT = 0, it means that the project in stage j may be completed on schedule;

[0096] When ΔT<0, it means that the project in stage j may be delayed, and a delay reminder will be given, the cause of the delay will be analyzed, and a monitoring mechanism will be established to prevent further delays.

[0097] Then, based on the completion time deviation corresponding to the current progress of each stage of the project, the delay cost of each stage of the project is calculated. The calculation method of the delay cost of the j-th stage project is as follows:

[0098]

[0099] In the formula, is the labor cost increased by the delay of the stage project, where i represents the type of work, h i represents the additional man-hours required per day, w i represents the corresponding labor cost per unit of man-hour, and ΔT represents the expected lag time; The equipment rental cost increased by the project delay, where a represents the equipment to be rented, ra The unit price for equipment leasing; It represents the material cost increased by the project delay, where l represents the material type and k represents u l is the initial amount of material, p l is the initial price of the unit material, e l is the price growth rate of the material (depending on factors such as market fluctuations).

[0100] Embodiment six:

[0101] This embodiment is further designed on the basis of the fifth embodiment in that, in this embodiment, based on the delayed cost and stage cost of each stage project, the cost deviation of each stage project is obtained, and the specific steps of judging whether the current progress cost of each stage project exceeds the safety range include:

[0102] Based on the delayed cost and stage cost of each stage project, the cost deviation of each stage project is obtained. The cost deviation ΔC when the jth stage project is completed is calculated by the following formula:

[0103] ΔC=C m -(C g +C j )

[0104] In the formula, C m is the stage cost threshold of the j-th stage project.

[0105] When ΔC ≥ 0, it means that the project cost of the jth stage is within the safe range;

[0106] When ΔC < 0, it means that the project cost of the jth stage exceeds the safety range, and a risk control plan is adopted, including analyzing the reasons for cost overruns and adjusting resource planning.

[0107] Embodiment seven:

[0108] This embodiment is further designed on the basis of the sixth embodiment in that, in this embodiment, the specific steps of controlling the cost and resources of the next stage project based on the balance at the completion of the previous stage project include:

[0109] Get the balance of the previous stage project when it is completed, and the balance of the j-th stage project δ j The method to obtain is as follows:

[0110] δ j =C j -C B

[0111] In the formula, C B is the actual recorded cost in stage j;

[0112] If the balance at the completion of the previous phase of the project is greater than or equal to 0, the same cost control measures will be applied to the next phase of the project;

[0113] If the balance of the previous stage project is less than 0, the cost compression rate will be used to control the cost and resources of the next stage project;

[0114] That is, when δ j >0, indicating that there is a surplus in the cost of the jth stage of the project, the cost control in this stage is effective, the budget is reasonable, and the same cost control measures are adopted in the construction of the j+1th stage of the project;

[0115] When δ j =0, indicating that there is no surplus in the cost of the project in stage j, the cost estimate of this stage is relatively accurate, and the budget preparation is relatively reasonable;

[0116] When δ j <0, indicating that the cost of the project in the jth phase is overspent, the budget preparation for this phase is unreasonable, cost monitoring is ineffective, and resources are wasted. Active adjustment plans should be taken, including re-planning and allocation of resources for the j+1th phase and compressing the cost of the j+1th phase.

[0117] Based on the balance of the previous stage project, the cost compression rate of the next stage project is calculated. For the cost compression rate Q of the j+1 stage project j+1 The calculation formula is as follows:

[0118]

[0119] When the cost compression rate of the next stage project is less than the set cost compression rate threshold, the compression rate is within a reasonable range, and the stage cost is compressed according to the cost compression rate of the next stage project, and the resources of the next stage project are allocated;

[0120] When the cost compression rate of the subsequent stage project is greater than or equal to the set cost compression rate threshold, the compression rate is outside the reasonable range. In this case, the remaining stage costs will be compressed based on the cost overruns of the previous stage project, and the remaining stage costs will be readjusted and allocated.

[0121] That is, when Q j+1 <Q max , indicating that the compression rate is within a reasonable range. According to the compression rate Q j+1 Compress the cost of the j+1th stage and fine-tune the allocation of resources in the j+1th stage;

[0122] When Q j+1 ≥Q max , indicating that the compression rate is unreasonable. According to the cost overrun of the jth stage, the cost of the remaining stages of the project is compressed, and the remaining stage costs are readjusted and allocated.

[0123] Embodiment eight:

[0124] The present invention provides a power grid technical renovation and maintenance project investment estimation management and control system, comprising a project cost acquisition module, a stage cost acquisition module, a resource consumption judgment module, a cost judgment module and a management and control module;

[0125] The project cost acquisition module is used to obtain the project cost of the power grid technical transformation and maintenance project. The project cost includes fixed cost and variable cost.

[0126] The stage cost acquisition module is used to divide the power grid technical transformation and maintenance project into several stage projects arranged according to the preset construction period, and obtain the stage cost of each stage project in combination with the project cost;

[0127] The resource consumption judgment module is used to judge whether the resources consumed by the current progress of each stage of the project exceed the safety range based on the proportion of the resources consumed by the current progress of each stage of the project to the total consumed resources;

[0128] The cost judgment module is used to estimate the delayed cost of each stage of the project based on the completion time deviation corresponding to the current progress of the project at each stage; based on the delayed cost and stage cost of each stage of the project, the cost deviation of each stage of the project is obtained, thereby judging whether the current progress cost of each stage of the project exceeds the safety range;

[0129] The management and control module is used to control the cost and resources of the next stage of the project based on the balance at the completion of the previous stage of the project.

[0130] Embodiment nine:

[0131] 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.

[0132] 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.

[0133] 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 estimating and controlling investment in power grid technical renovation and maintenance projects, characterized in that: include: Obtaining the project cost of the power grid technical transformation and maintenance project, wherein the project cost includes fixed cost and variable cost; Divide the power grid technical renovation and maintenance project into several phase projects arranged according to a preset construction period, and obtain the phase cost of each phase project in combination with the project cost; Based on the proportion of resources consumed by the current progress of each stage of the project to the total consumed resources, determine whether the resources consumed by the current progress of each stage of the project exceed the safety range; Estimate the delay cost of each stage of the project based on the completion time deviation corresponding to the current progress of each stage of the project; Based on the delayed cost and stage cost of the project at each stage, the cost deviation of the project at each stage is obtained, thereby judging whether the current progress cost of the project at each stage exceeds the safety range; Based on the balance left over from the previous stage of the project, the cost and resources of the next stage of the project are managed and controlled.

2. The method for investment estimation and control of power grid technical renovation and maintenance projects according to claim 1 is characterized in that: The expression of the project cost is: In the formula, TC is the total cost; FC is the fixed cost; VC is the i is the ith variable cost, and n is the total number of variable costs.

3. The method for investment estimation and control of power grid technical renovation and maintenance projects according to claim 2 is characterized in that: The specific method of dividing the power grid technical renovation and maintenance project into several phase projects arranged with a preset construction period and obtaining the phase cost of each phase project in combination with the project cost includes: According to the phased arrangement of the power grid technical renovation and maintenance project, the power grid technical renovation and maintenance project is divided into a number of phase projects, and the several phase projects are arranged according to a preset construction period; Set the cost weight of each stage project and calculate the normalized cost weight. The calculation formula of the cost weight is: In the formula, is the normalized cost weight, w j is the cost weight of the jth stage; Based on the normalized cost weights, the settlement cost of each stage project is calculated. For the j-th stage project, the stage cost C j Calculate using the following formula: Where TC is the project cost.

4. The method for investment estimation and control of power grid technical renovation and maintenance projects according to claim 3 is characterized in that: The specific steps of judging whether the resources consumed by the current progress of the project at each stage exceed the safety range based on the proportion of the resources consumed by the current progress of the project at each stage to the total consumed resources include: Based on the resources consumed by the current progress of the project at each stage and the predicted total resources, calculate the proportion of resources consumed by the current progress of the project at each stage to the total consumed resources. For the jth stage, the proportion of resources consumed by the current progress of the project to the total consumed resources is Q j The calculation formula is as follows: In the formula, R j The resources consumed by the current progress of the project in the jth stage; R q Forecast total resources for phase projects; A threshold ratio of resources consumed by the current progress of the project in each stage to the total consumed resources is set. If the ratio is greater than the threshold ratio, the resources consumed by the current progress of the project in this stage are within a safe range; otherwise, the resources consumed by the current progress of the project in this stage are outside the safe range, and the causes of the abnormal consumption of the project in this stage are investigated and resources are monitored.

5. The method for investment estimation and control of power grid technical renovation and maintenance projects according to claim 4 is characterized in that: The specific steps of estimating the delay cost of each stage of the project based on the completion time deviation corresponding to the current progress of each stage of the project include: Based on the actual progress rate corresponding to the current progress of each stage of the project, the completion time deviation of each stage of the project is calculated. The completion time deviation ΔT of the j-th stage project is calculated by the following formula: Where, T p Set a preset construction period for the project; u P is the construction period of the project; j is the actual progress rate of the project; Then, based on the completion time deviation corresponding to the current progress of the project in each stage, the delay cost of the project in each stage is calculated. The calculation method of the delay cost of the project in the jth stage is as follows: In the formula, is the labor cost increased by the delay of the stage project, where i represents the type of work, h i represents the additional man-hours required per day, and wi represents the corresponding labor cost per unit man-hour; The equipment rental cost increased by the project delay, where a represents the equipment to be rented, r a The unit price for equipment leasing; It represents the material cost increased by the project delay, where l represents the material type and k represents u l is the initial amount of material, p l is the initial price of the unit material, e l is the price growth rate of the material.

6. The method for investment estimation and control of power grid technical renovation and maintenance projects according to claim 5 is characterized in that: The specific steps of obtaining the cost deviation of the project at each stage based on the delayed cost and stage cost of the project at each stage, and judging whether the current progress cost of the project at each stage exceeds the safety range include: Based on the lag cost and stage cost of the project at each stage, the cost deviation of the project at each stage is obtained, and the cost deviation ΔC when the j-th stage project is completed is calculated by the following formula: ΔC=C m -(C g +C j ) In the formula, C m is the stage cost threshold of the j-th stage project.

7. The method for investment estimation and control of power grid technical renovation and maintenance projects according to claim 6 is characterized in that: The specific steps for controlling the cost and resources of the next stage project based on the balance at the completion of the previous stage project include: Get the balance of the previous stage project when it is completed, and the balance of the j-th stage project δ j The method to obtain is as follows: d j =C j -C B In the formula, C B is the actual recorded cost in stage j; If the balance at the completion of the previous phase of the project is greater than or equal to 0, the same cost control measures will be applied to the next phase of the project; If the balance of the previous stage project is less than 0, the cost compression rate will be used to control the cost and resources of the next stage project; According to the balance of the previous stage project, the cost compression rate of the next stage project is calculated. For the cost compression rate Q of the j+1 stage project j+1 The calculation formula is as follows: When the cost compression rate of the next stage project is less than the set cost compression rate threshold, the compression rate is within a reasonable range, and the stage cost is compressed according to the cost compression rate of the next stage project, and the resources of the next stage project are allocated; When the cost compression rate of the subsequent stage project is greater than or equal to the set cost compression rate threshold, the compression rate is outside the reasonable range. In this case, the remaining stage costs will be compressed based on the cost overruns of the previous stage project, and the remaining stage costs will be readjusted and allocated.

8. A system for estimating and controlling investment in power grid technical renovation and maintenance projects, characterized in that: It includes project cost acquisition module, stage cost acquisition module, resource consumption judgment module, cost judgment module and control module; The project cost acquisition module is used to acquire the project cost of the power grid technical transformation and maintenance project, and the project cost includes fixed cost and variable cost; The stage cost acquisition module is used to divide the power grid technical renovation and maintenance project into several stage projects arranged according to a preset construction period, and obtain the stage cost of each stage project in combination with the project cost; The resource consumption judgment module is used to judge whether the resources consumed by the current progress of the project at each stage exceed the safety range based on the proportion of the resources consumed by the current progress of the project at each stage to the total consumed resources; The cost judgment module is used to estimate the delay cost of each stage of the project based on the completion time deviation corresponding to the current progress of each stage of the project; Based on the delayed cost and stage cost of the project at each stage, the cost deviation of the project at each stage is obtained, thereby judging whether the current progress cost of the project at each stage exceeds the safety range; The control module is used to control the cost and resources of the next stage project based on the balance at the completion of the previous stage 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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