Evaluation model and calculation method for improvement priority of out-of-age equipment

Abstract

The invention provides an out-of-age equipment transformation priority evaluation model and a calculation method, and belongs to the technical field of equipment transformation estimation, and the method comprises the following steps: carrying out the comprehensive health degree evaluation of equipment through an evaluation model, and giving a bottom line maintenance strategy for each piece of equipment according to data, the method comprises the following steps: acquiring current-year equipment budget data and enterprise work key work data from a budget system, and giving corresponding category equipment strategies and corresponding budget data according to category data corresponding to the equipment budget degree, the equipment budget data and the enterprise work key work data; and according to the equipment strategy and budget data of each category, analyzing the priority of transformation of each piece of equipment in the same kind of equipment. The method comprises the following steps: firstly, performing reserve evaluation according to the use limit, then performing priority processing on limit equipment, then putting all equipment into budget and key work of the current year for consideration, performing large-class evaluation, and then performing priority comparison in the same class, so that the sorted priority has higher comparability.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment transformation estimation, and particularly to an evaluation model and calculation method for the transformation priority of over-aged equipment. Background Art

[0002] Most of the power grid equipment adopts a planned maintenance system, which has serious defects, such as frequent temporary maintenance, insufficient or excessive maintenance, and blind maintenance, etc., resulting in huge annual costs for equipment maintenance. How to reasonably arrange the maintenance of power equipment, save maintenance costs, reduce maintenance costs, and at the same time ensure a high reliability of the system is an important issue for system operators. With the application of comprehensive intelligent systems such as sensing technology, microelectronics, computer software and hardware, digital signal processing technology, artificial neural networks, expert systems, and fuzzy set theory in condition monitoring and fault diagnosis, the research on condition-based maintenance based on equipment condition monitoring and advanced diagnostic technology has been developed and has become an important research field in the power system.

[0003] Currently, considering the actual scale of technological transformation investment, the scale of existing over-aged equipment, and the growth rate of equipment aging, the existing technological transformation cannot balance the transformation of old equipment and the promotion of key work, and it is difficult to comprehensively transform old equipment. Therefore, the problems and defects of the existing technology are as follows: the existing technology cannot objectively, scientifically, and accurately judge the transformation priority of old equipment, the operability and implementability of the technological transformation evaluation criteria are not strong, it cannot be applied to actual scenarios, and it cannot provide a reference for actual equipment transformation.

[0004] A Chinese patent with the publication number CN116823214A discloses a method, device, equipment, and medium for determining the technological transformation priority of power grid equipment, which determines four evaluation dimensions: equipment status, equipment importance, equipment operation years, and asset depreciation rate; determines the weights of the indicators for each evaluation dimension and constructs a technological transformation decision-making evaluation model; based on the constructed technological transformation decision-making evaluation model, combines production technological transformation criteria and line operation data, and comprehensively determines the technological transformation standard line for the four evaluation dimensions to preliminarily screen the power grid equipment that needs to be transformed; sorts the selected power grid equipment in descending order according to the technological transformation decision-making score to determine the technological transformation priority of the power grid equipment. This method only evaluates through the independent indicators of the equipment and generally evaluates all the equipment, and cannot be reformed according to the development of the enterprise and the annual budget, etc., so the transformation cannot be implemented. Therefore, it is necessary to design an evaluation model and calculation method for the transformation priority of over-aged equipment. Summary of the Invention

[0005] The purpose of the present invention is to provide an evaluation model and calculation method for the transformation priority of over-aged equipment, so as to solve the technical problem that the existing selection methods for the transformation of over-aged equipment have a single index and cannot evaluate according to the actual development and budget data of the enterprise.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] Over-aged equipment transformation priority evaluation model and calculation method, the method comprising the following steps:

[0008] Step 1: Comprehensively evaluate the health of the equipment through the evaluation model;

[0009] Step 2: Give a bottom-line maintenance strategy for each piece of equipment based on the equipment operation function, operation principle, and equipment spare data;

[0010] Step 3: Obtain the current year's equipment budget data and the key work data of the enterprise from the budget system;

[0011] Step 4: Give the corresponding category equipment strategy and corresponding budget data according to the equipment health, equipment budget data, and the corresponding category data of the key work data of the enterprise;

[0012] Step 5: Analyze the transformation priority of each piece of equipment among the same category of equipment according to the equipment strategy and budget data of each category;

[0013] Step 6: Implement corresponding operation and maintenance actions for each piece of equipment according to the priority of each piece of equipment to ensure the normal operation of the equipment.

[0014] Further, the indicators of the evaluation model in Step 1 include health and equipment age. In terms of health, the equipment is evaluated uniformly in units of equipment categories. The equipment categories include power transmission and transformation equipment and other types of equipment.

[0015] Further, in Step 1, the comprehensive evaluation score of power transmission and transformation equipment = (equipment importance score + equipment status evaluation score) * 30% + age score * 40%, and the comprehensive evaluation score of other equipment = equipment defect score * 60% + age score * 40%. Among them, the asset health of power transmission and transformation equipment is evaluated from two dimensions of importance and status evaluation, and the equipment status evaluation results of the bureau are directly applied. The importance is divided into four levels: general, concerned, important, and critical, and the status evaluation is divided into four levels: normal, abnormal, attention, and serious, and are assigned 1, 3, 5, and 7 points respectively. The health of other asset equipment is scored according to the number of defects occurred in the past 3 years of the equipment. Each occurrence of a general, urgent, and major defect is assigned 1, 3, and 5 points respectively. The age dimension is the operation years of the asset equipment, and one point is obtained for each year of operation. Finally, the comprehensive score is calculated by weighted calculation and sorted from high to low. The higher the score, the stronger the urgency of asset transformation and the higher the priority; in the case of the same score, the sorting is carried out according to the health and age scores in turn.

[0016] Further, in step 2, obtain the maintenance records and operation records of the equipment, obtain equipment-related data from the Internet according to the equipment operation functions and principles, find out the maximum service life and fault data of the equipment, then evaluate the limit life data of the equipment based on the maintenance records and operation records of the corresponding equipment, finally find the spare data of each equipment, estimate the sustainable limit operation time of the equipment according to the spare data, and then give technical maintenance strategies for each equipment. When the equipment operation limit time cannot meet the requirements of the current year, the technician shall promptly search for the corresponding time to maintain the equipment.

[0017] Further, in step 3, the equipment budget data includes the budget data for new equipment investment, the budget data for equipment transformation, overhaul, and component maintenance, and the budget data for equipment inspection and maintenance. Then obtain the key work item content of the enterprise in the current year from the OA system, and then find all the equipment related to the key work items and list them as the key equipment objects in the current year. The key equipment objects in the current year are the priority treatment objects of the same-level equipment.

[0018] Further, in step 4, classify all the equipment of the enterprise, and then evaluate the equipment strategies in units of categories. When evaluating a category of equipment, use the average health degree of a single equipment as an index and the number of operating equipment as the base number. Then multiply the average health degree of a single equipment as an index by the number of operating equipment to obtain the category equipment strategy index. Then search for the corresponding budget data. When there is corresponding special category equipment investment, corresponding special category transformation, or special maintenance budget data in the current year, the corresponding special category equipment has the highest priority. Then arrange the category equipment according to the category equipment strategy index data. When the category equipment strategy index reaches the technical transformation strategy index, set the corresponding category of equipment as the technical transformation strategy. When the category equipment strategy index reaches the operation and maintenance strategy index, set the corresponding category of equipment as the repair strategy. When the category equipment strategy index reaches the repair strategy index, set the corresponding category of equipment as the operation and maintenance strategy, and automatically allocate the corresponding budget data according to the arrangement data.

[0019] Further, in step 5,

[0020] Calculate the transformation priority of two types of assets, namely main transformers and transmission cables. For main transformers, count the number of main transformers as N units. According to the equipment importance and status evaluation results in the equipment risk list, there are K units of key important main transformers and main transformers in the attention status respectively, and N > K. Combine the commissioning time, apply comprehensive evaluation to each main transformer, and sort them from high to low according to the scores.

[0021] Further, in step 5, in the priority comparison of the same type of equipment, use the model in step 1 as the primary index, then use the Internet index data of the corresponding category of equipment manufacturers as the secondary index, then set the corresponding weights, summarize to obtain the index data of a single equipment, and then arrange the priorities according to the index data.

[0022] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0023] The present invention first conducts a reserve evaluation based on the limit of use, then gives priority to the treatment of limit equipment, and then considers all equipment in the annual budget and key work, and conducts a general category evaluation first, and then compares the priorities within the same category, making the sorted priorities more comparable and providing more accurate data for enterprise equipment maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a flowchart of the method of the present invention.

[0025] Figure 2 is a diagram of the situation of preferentially transforming the main transformer of the present invention;

[0026] Figure 3 is a diagram of the situation of preferentially transforming the transmission cable (body) of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the following preferred embodiments are given with reference to the accompanying drawings, and the present invention is further described in detail. However, it should be noted that many details listed in the specification are only for the reader to have a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be realized even without these specific details.

[0028] As Figure 1 shown, an over-aged equipment transformation priority evaluation model and calculation method, the method comprising the following steps:

[0029] Step 1: Comprehensively evaluate the health of the equipment through the evaluation model. The indicators of the evaluation model include health and equipment age. In terms of health, the equipment is evaluated uniformly in units of equipment categories, and the equipment categories include power transmission and transformation equipment and other types of equipment.

[0030] As shown in Table 1, the comprehensive evaluation score of power transmission and transformation equipment = (equipment importance score + equipment status evaluation score) * 30% + age score * 40%, and the comprehensive evaluation score of other equipment = equipment defect score * 60% + age score * 40%. Among them, the asset health of power transmission and transformation equipment is evaluated from two dimensions: importance and status evaluation. The equipment status evaluation results of the bureau are directly applied. The importance is divided into four levels: general, concerned, important, and critical, and the status evaluation is divided into four levels: normal, abnormal, attention, and serious, with scores of 1, 3, 5, and 7 respectively. The health of other asset equipment is scored according to the number of defects occurred in the past 3 years. Each occurrence of a general, urgent, or major defect is assigned 1, 3, and 5 points respectively. The age dimension is the operation years of the asset equipment, with one point for each year of operation. Finally, the comprehensive score is calculated by weighted calculation and sorted from high to low. The higher the score, the stronger the urgency of asset transformation and the higher the priority. In the case of the same score, the sorting is based on health and age score in turn.

[0031] Table 1 Comprehensive evaluation model of health - age structure

[0032]

[0033] Step 2: Give the bottom - line maintenance strategy for each device based on the device operation function, operation principle, and device spare data. Obtain the maintenance records and operation records of the device, obtain the device - related data from the Internet according to the device operation function and principle, find out the maximum service life and failure data of the device, then evaluate the limit life data of the device based on the corresponding device maintenance records and operation records, and finally find the spare data of each device. Estimate the sustainable limit operation time of the device according to the spare data, and then give the technical maintenance strategy for each device. When the technical personnel find that the device operation limit time cannot meet the current year's requirements, they should promptly find the corresponding time for device maintenance.

[0034] Step 3: Obtain the device budget data for the current year and the key work data of the enterprise from the budget system. The device budget data includes the budget data for new device investment, the budget data for device transformation, overhaul, and component maintenance, and the budget data for device inspection and maintenance. Then obtain the content of the key work items of the enterprise in the current year from the OA system, and then find all the devices related to the key work items and list them as the key device objects for the current year. The key device objects for the current year are the priority treatment objects for devices of the same level.

[0035] Step 4: Based on the health condition of the equipment, the equipment budget data, and the corresponding category data of the key work data of the enterprise, give the corresponding category equipment strategies and the corresponding budget data. Classify all the equipment of the enterprise by category, and then evaluate the equipment strategies by category. When evaluating a category of equipment, use the average health degree of a single equipment as the index, and the base number of the equipment in operation. Then multiply the average health degree of a single equipment by the base number of the used equipment to obtain the category equipment strategy index. Then, look up the corresponding budget data. When there is corresponding special category equipment investment, corresponding special category transformation, or special maintenance budget data in the current year, the corresponding special category equipment has the highest priority. Then, arrange the category equipment according to the category equipment strategy index data. When the category equipment strategy index reaches the technical transformation strategy index, set the corresponding category of equipment as the technical transformation strategy. When the category equipment strategy index reaches the operation and maintenance strategy index, set the corresponding category of equipment as the repair strategy. When the category equipment strategy index reaches the repair strategy index, set the corresponding category of equipment as the operation and maintenance strategy. Automatically allocate the corresponding budget data according to the arrangement data.

[0036] Based on the comprehensive asset evaluation results, combined with the investment scale of technical transformation and repair projects in the current year, determine the basis of the equipment technical transformation - repair - operation and maintenance strategy, and output the list of equipment with the highest priority for technical transformation.

[0037] Step 5: Analyze the priority of transformation of each equipment among the same category of equipment according to the equipment strategy and budget data of each category. Among them, for equipment of the same category, some may be replaced with new ones, some may be technically transformed, some may be repaired, and the rest may be maintained. According to whether the budget amount is sufficient, if it is not sufficient and it is for transformation, it can be changed to repair.

[0038] Take the main transformer and transmission cable as two types of assets to calculate the transformation priority. For the main transformer, count the number of main transformers as N units. According to the importance of the equipment in the equipment risk list and the status evaluation results, there are K units of key important and attention status main transformers respectively, and N > K. Combine the commissioning time, apply comprehensive evaluation to each main transformer, and sort them from high to low according to the scores.

[0039] In the priority comparison of equipment of the same category, use the model in Step 1 as the preliminary index, then use the Internet index data of the corresponding category of equipment suppliers as the secondary index, then set the corresponding weights, summarize to obtain the index data of a single equipment, and then arrange the priorities according to the index data.

[0040] 1) Main transformer

[0041] As of the end of 2023, there were a total of 1,003 main transformers globally. According to the importance of the equipment and the status evaluation results in the "Equipment Risk List", there were 82 and 61 main transformers with "critical" importance and "attention" status respectively. Combining the commissioning time, a comprehensive evaluation was applied to each main transformer, and they were sorted from high to low according to the scores.

[0042] In 2024, the power transformation specialty of the production and technical transformation project allocated 590 million yuan of technical transformation funds, of which the technical transformation funds for main transformers were approximately 130 million yuan. According to the ranking of the comprehensive scores of the main transformers measured by the model, there were 31 main transformers with the sum of asset values controlled within 130 million yuan, which could be included in the priority renovation list, and the remaining main transformers adopted operation and maintenance strategies, as shown in Table 2.

[0043] Table 2 Calculation of the priority renovation list of main transformers in 2024

[0044]

[0045]

[0046]

[0047]

[0048] The ages of the 31 main transformers measured for priority renovation are distributed between 23 and 36 years, all exceeding the old age limit of substation equipment and having been in operation for a long time; among them, the proportion of "important" equipment is 87%, and the proportion of equipment in the "attention" state is 29%. The First, Second, and Third Substation Maintenance Offices are responsible for the operation and maintenance of 11, 9, and 11 of them respectively, as Figure 2 shown.

[0049] 2) Transmission lines (cables)

[0050] According to the importance of the equipment and the status evaluation results in the "Equipment Risk List", combined with the commissioning time, a comprehensive evaluation was applied to the cable body, and they were sorted from high to low according to the scores.

[0051] In 2024, the transmission specialty of the production and technical transformation project allocated 260 million yuan of technical transformation funds, of which the technical transformation funds for the cable body were approximately 70 million yuan. According to the ranking of the comprehensive scores measured by the model, a total of 27 lines with the sum of asset values controlled within 70 million yuan were involved and could be included in the priority renovation list, and the remaining transmission cables adopted operation and maintenance strategies.

[0052] Table 3-9 Calculation of the priority renovation list of cable bodies in 2024

[0053]

[0054]

[0055] The priority is to transform the cable body with an age distribution between 20 and 39 years. The proportion of "important" equipment is 18%, and the "equipment status" is normal. Among them, 78% is maintained by the Second Transmission and Distribution Institute, as Figure 3 shown.

[0056] Step 6: Implement corresponding maintenance actions for each device according to the priority of each device to ensure the normal operation of the device.

[0057] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. Over-aged equipment transformation priority evaluation model and calculation method, characterized in that: The method includes the following steps: Step 1: Comprehensively evaluate the health of the equipment through an evaluation model; Step 2: Give a bottom-line maintenance strategy for each piece of equipment based on the equipment operation function, operation principle, and equipment spare data; Step 3: Obtain the equipment budget data for the current year and the key work data of the enterprise from the budget system; Step 4: Give the corresponding category equipment strategy and corresponding budget data according to the health of the equipment, equipment budget data, and the corresponding category data of the key work data of the enterprise; Step 5: Analyze the priority of transformation of each piece of equipment among the same type of equipment according to the equipment strategy and budget data of each category; Step 6: Implement corresponding operation and maintenance actions for each piece of equipment according to the priority of each piece of equipment to ensure the normal operation of the equipment.

2. The over-age equipment transformation priority evaluation model and calculation method according to claim 1, characterized in that: The indicators of the evaluation model in Step 1 include health and equipment age. In terms of health, the equipment is evaluated uniformly in units of equipment categories. The equipment categories include power transmission and transformation equipment and other types of equipment.

3. The overage equipment transformation priority evaluation model and calculation method according to claim 2, characterized in that: In Step 1, the comprehensive evaluation score of power transmission and transformation equipment = (equipment importance score + equipment status evaluation score) * 30% + age score * 40%. The comprehensive evaluation score of other equipment = equipment defect score * 60% + age score * 40%. Among them, the asset health of power transmission and transformation equipment is evaluated from two dimensions: importance and status evaluation. The equipment status evaluation results of the bureau are directly applied. The importance is divided into four levels: general, concerned, important, and critical. The status evaluation is divided into four levels: normal, abnormal, attention, and serious, and are assigned 1, 3, 5, and 7 points respectively. The health of other asset equipment is scored according to the number of defects occurred in the past 3 years of the equipment. Each occurrence of a general, urgent, and major defect is assigned 1, 3, and 5 points respectively. The age dimension is the operation years of the asset equipment, and one point is obtained for each year of operation. Finally, the comprehensive score is calculated by weighted calculation and sorted from high to low. The higher the score, the stronger the urgency of asset transformation and the higher the priority; in the case of the same score, they are sorted in turn according to health and age score.

4. The over-aged equipment transformation priority evaluation model and calculation method according to claim 1, characterized in that: In Step 2, obtain the maintenance records and operation records of the equipment, obtain the equipment-related data from the Internet according to the equipment operation function and principle, find out the maximum service life and failure data of the equipment, and then evaluate the limit life data of the equipment according to the maintenance records and operation records of the corresponding equipment. Finally, find the spare data of each equipment, estimate the sustainable limit operation time of the equipment according to the spare data, and then give a technical maintenance strategy for each piece of equipment. When the technical personnel find that the equipment operation limit time cannot meet the current year's requirements, they should promptly find the corresponding time to maintain the equipment.

5. The overage equipment transformation priority evaluation model and calculation method according to claim 1, characterized in that: In Step 3, the equipment budget data includes the budget data for new equipment investment, the budget data for equipment transformation, overhaul, device maintenance, and the budget data for equipment inspection and maintenance. Then obtain the content of the key work items of the enterprise in the current year from the OA system, and then find all the equipment related to the key work items and list them as the key equipment objects for the current year. The key equipment objects for the current year are the priority treatment objects for the same-level equipment.

6. The over-aged equipment transformation priority evaluation model and calculation method according to claim 1, characterized in that: In step 4, all the enterprise's equipment is classified, and then equipment strategy evaluation is carried out by category. When evaluating a certain category of equipment, the average health degree of a single piece of equipment is used as an index, and the base number of operating equipment is used. Then, the average health degree of a single piece of equipment is multiplied by the base number of used equipment to obtain the category equipment strategy index. Then, the corresponding budget data is searched. When there is corresponding special category equipment investment, corresponding special category transformation or special maintenance budget data in the current year, the corresponding special category equipment has the highest priority. Then, the category equipment is arranged according to the category equipment strategy index data. When the category equipment strategy index reaches the technical transformation strategy index, the corresponding category of equipment is set as the technical transformation strategy. When the category equipment strategy index reaches the operation and maintenance strategy index, the corresponding category of equipment is set as the repair strategy. When the category equipment strategy index reaches the repair strategy index, the corresponding category of equipment is set as the operation and maintenance strategy. The corresponding budget data is automatically allocated according to the arrangement data.

7. The over-aged equipment transformation priority evaluation model and calculation method according to claim 1, characterized in that: In step 5, For the transformation priority measurement of two types of assets, namely main transformers and transmission cables, in the case of main transformers, the number of main transformers is counted as N units. According to the equipment importance and status evaluation results in the equipment risk list, there are K units of key important and attention status main transformers respectively, and N > K. Combining with the commissioning time, a comprehensive evaluation is applied to each main transformer, and they are sorted from high to low according to the scores.

8. The over-aged equipment transformation priority evaluation model and calculation method according to claim 1, characterized in that: In step 5, in the priority comparison of the same type of equipment, the model in step 1 is used as the preliminary index, and then the Internet index data of the corresponding category of equipment suppliers is used as the secondary index. Then, the corresponding weights are set, and the index data of a single piece of equipment is summarized. Then, the priorities are arranged according to the index data.

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