Life extension potential evaluation method and device of switch cabinet and electronic equipment

Abstract

The invention relates to a life extension potential evaluation method and device of a switch cabinet and electronic equipment, and the method comprises the following steps: collecting the historical operation data, environment data and test data of each part according to the life extension potential evaluation quantity of each part of the switch cabinet; carrying out statistics on fault data, defect data, anti-accident measure execution data, spare part data and appearance data of each part; according to the obtained data, point deduction calculation is carried out on each component according to the point deduction standard and the judgment basis corresponding to each component of the switch cabinet; respectively summing up the deducted scores of each part to obtain an actual deducted score value and a life extension potential evaluation grade of each part; adding the deducted scores of all the components to obtain a total deducted score value of the whole switch cabinet equipment, and obtaining a switch cabinet whole life extension potential evaluation grade according to a switch cabinet whole life extension potential evaluation standard; and making corresponding measures according to the overall life extension potential evaluation grade of the switch cabinet. Compared with the prior art, the method has the advantages of comprehensive evaluation indexes, high evaluation accuracy and the like.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage switch cabinets, and in particular to a method for evaluating the life extension potential of a switch cabinet. Background Art

[0002] In 2020, the State Grid Corporation's equipment management system requires that the average life of substation equipment be 20 years, and in 2025 it is required to reach 23 years. As the most used power equipment, the proportion of over-age equipment in service that has been in operation for more than 20 years is increasing, and the pressure on asset operation is increasing. The risk of "asset wall" formed by years of high-intensity and large-scale construction is becoming increasingly prominent. However, due to the lack of research on the aging status assessment system of key components of aging switchgear, as the service life of switchgear increases, there is still a lack of response methods for the problems of increasing pressure on switchgear renewal and transformation, accumulated failure risks, and rising operation and maintenance costs. It is urgent to carry out research on the life extension strategy of key components of aging high-voltage switchgear, formulate a life extension potential evaluation method for key components of aging high-voltage switchgear, determine whether the switchgear has life extension potential, form a scientific judgment, and effectively avoid blind equipment replacement while ensuring the reliability of power supply of the power grid, optimize the maintenance investment and operation strategy, and improve the quality and efficiency of equipment asset management.

[0003] After searching, Chinese invention patent publication number CN 116739262 A discloses a switchgear operation and maintenance method based on health evaluation, including: obtaining the operation data of the switchgear, the operation data including operation environment data and operation health index; the operation environment data including the operation years and partial discharge; the operation health index including insulation performance, current carrying capacity, SF6 gas, mechanical properties, grounding resistance and appearance; grading the switchgear according to the operation environment data to obtain the corresponding grade of the switchgear; evaluating the switchgear according to the operation health index to obtain the operation status of the switchgear; the operation status is divided into normal state, attention state, abnormal state and serious state; generating an operation and maintenance strategy according to the grade and operation status of the switchgear. This existing patent has the problem of incomplete evaluation and low accuracy.

[0004] How to achieve automatic and accurate evaluation of the life extension potential of switchgear has become a technical problem that needs to be solved. Summary of the invention

[0005] The purpose of the present invention is to provide a method for evaluating the life extension potential of a switch cabinet in order to overcome the defects of the prior art.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] According to one aspect of the present invention, a method for evaluating the life extension potential of a switch cabinet is provided, the method comprising the following steps:

[0008] Step S1, according to the life extension potential evaluation of each component of the switch cabinet, collect the historical operation data, environmental data and test data of each component, and count the fault data, defect data, anti-accident measure execution data, spare parts data and appearance data of each component, wherein the components of the switch cabinet include the cabinet body, mechanism components, arc extinguishing chamber and insulating parts;

[0009] Step S2, according to the data obtained in step S1, and according to the deduction standards and judgment basis corresponding to each component of the switch cabinet, deduction calculation is performed for each component;

[0010] Step S3, summing up the deduction points of each component in step S2 to obtain the deduction points of each component; and obtaining the life extension potential evaluation level of each component according to the component life extension potential evaluation standard;

[0011] Step S4, adding the deduction points of each component in step S3 to obtain the total deduction point value of the switch cabinet equipment as a whole, and obtaining the overall life extension potential evaluation level of the switch cabinet according to the overall life extension potential evaluation standard of the switch cabinet;

[0012] Step S5, formulating corresponding measures according to the overall life extension potential evaluation level of the switch cabinet.

[0013] Preferably, the evaluation quantities of the cabinet include appearance inspection and rated current during operation, as well as partial discharge detection, withstand voltage test and interlocking performance inspection of the cabinet.

[0014] Preferably, the evaluation quantities of the arc extinguishing chamber include evaluation quantities during operation, as well as insulation resistance, withstand voltage test and X-ray detection tests, wherein the evaluation quantities during operation include rated short-circuit breaking current, breaking operation current and accumulated breaking fault current.

[0015] Preferably, the evaluation quantities of the mechanism components during operation include the number of operations, the mechanism box, the buffer, the evaluation quantities related to the time characteristics, the evaluation quantities related to the speed characteristics, the three-phase inconsistency protection and the spring mechanism operation; wherein the evaluation quantities related to the time characteristics include the opening time, the closing time, the closing and opening time, the different closing periods between phases, the different opening periods between phases, the different closing periods of the same-phase breaks and the different opening periods of the same-phase breaks; the evaluation quantities related to the speed characteristics include the opening speed and the closing speed.

[0016] Preferably, the evaluation quantity of the insulating component during operation includes whether a set proportion of the insulating components have discharge marks, cracks or damage on their appearance.

[0017] Preferably, the historical operation data and test data are test data within N years.

[0018] Preferably, obtaining the overall life extension potential evaluation level of the switch cabinet includes:

[0019] If the total deduction value of the switchgear equipment as a whole is less than 20, the overall life extension potential evaluation level of the switchgear is excellent;

[0020] If the total deduction value of the switchgear equipment as a whole is greater than or equal to 60, the overall life extension potential evaluation level of the switchgear is poor;

[0021] Otherwise, the overall life extension potential evaluation level of the switchgear is medium.

[0022] More preferably, the formulating corresponding measures according to the evaluation level includes:

[0023] Switchgear with a poor overall life extension potential evaluation level shall be replaced or scrapped in accordance with regulations;

[0024] For switchgear with an overall life extension potential evaluation grade of excellent, a life extension strategy for key switchgear components is formulated to extend the service life of the equipment through repair, renewal, and replacement of key switchgear components;

[0025] For switchgear with an overall life extension potential evaluation level of medium, the cost-effectiveness of the life extension project, including equipment purchase cost, maintenance cost, downtime cost, failure cost and potential benefits, is considered to decide whether to extend the life of the equipment.

[0026] According to another aspect of the present invention, a device for evaluating the life extension potential of a switch cabinet is provided, the device comprising: a data acquisition module, which acquires historical operation and environmental data of each component according to the life extension potential evaluation value of each component of the switch cabinet, and counts the information of component failures / defects of the same period and the same model, family defects, and execution of anti-accident measures, etc., acquires the electrical measurement data such as the opening and closing operation characteristic test of the mechanism components and the withstand voltage and insulation resistance, and acquires the data of component deformation, sealing, corrosion, etc.;

[0027] The life extension potential evaluation module calculates the deduction points for each component based on the data received from the data acquisition module, the deduction standards and the judgment basis, and adds up the actual deduction points of each component to obtain the total deduction point value of a switch cabinet equipment as a whole. According to the overall life extension potential evaluation standard of the switch cabinet, the overall life extension potential evaluation level of the switch cabinet is obtained, and the evaluation levels include excellent, medium and poor;

[0028] The measure generation module formulates corresponding measures according to the overall life extension potential evaluation level of the switchgear, including:

[0029] 1) For switchgear with poor life extension potential, it shall be replaced or scrapped in accordance with regulations;

[0030] 2) For switchgear with excellent life extension potential, output a plan for equipment life extension economic evaluation, formulate a life extension strategy for key components of the switchgear, and extend the service life of the equipment through maintenance, updating, replacement and other means of key components of the switchgear;

[0031] 3) For switchgear with a life extension potential of medium, output a plan for economic evaluation of equipment life extension, comprehensively consider the cost-effectiveness of the life extension project including equipment purchase cost, maintenance cost, downtime cost, failure cost and potential benefits, and decide whether to extend the life of the equipment.

[0032] According to a third aspect of the present invention, there is provided an electronic device, comprising a memory and a processor, wherein a computer program is stored in the memory, and the method described above is implemented when the processor executes the program.

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

[0034] (1) The present invention proposes multi-dimensional evaluation indicators for switchgear, including operating conditions, live detection, physical, electrical, and material testing under power outage conditions. According to certain scoring standards, the life extension potential of components such as the cabinet, mechanism components, arc extinguishing chamber, and insulating parts is evaluated and scored, and finally the overall life extension potential evaluation of the switchgear is formed, which is used to determine whether the switchgear is worth investing in upgrading or maintaining to extend its service life. Corresponding measures are automatically generated according to the evaluation level, which has the advantages of comprehensive evaluation indicators and more accurate evaluation;

[0035] (2) The present invention determines the life extension potential of switchgear equipment and can effectively identify which equipment is worth investing in for upgrading or maintenance, thereby ensuring that resources are used effectively;

[0036] (3) The evaluation rules and deduction criteria of the present invention are simple and practical, and can be conveniently used for rapid judgment and analysis by on-site maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the process of the life extension potential evaluation method of the present invention;

[0038] Figure 2 It is a structural schematic diagram of the life extension potential evaluation device in the present invention;

[0039] In the attached figure, 1: data acquisition module, 2: life extension potential evaluation module, 3: measure generation module. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0041] Example 1

[0042] The present embodiment relates to a method for evaluating the life extension potential of a switch cabinet, that is, based on multi-dimensional evaluation indicators that directly or indirectly reflect the life extension potential of the equipment, according to certain scoring standards, the life extension potential of key components is evaluated and scored, and finally an overall life extension potential evaluation of the switch cabinet is formed, which is used to determine the life extension potential of the switch cabinet and establish an equipment life extension warehousing evaluation system that comprehensively considers the reliability, availability, maintainability and safety of the equipment.

[0043] The multi-dimensional evaluation indicators include operating conditions, live detection, physical, electrical, material testing under power outage conditions, and family defects. Based on the deduction criteria, the life extension potential of different key components is evaluated and scored. Finally, the overall life extension potential of the switchgear is determined based on the total deduction points, and the existing equipment is evaluated to determine whether it is necessary to extend its service life through maintenance, upgrades or modifications.

[0044] The switch cabinet has four types of components according to different functions, performances, failure modes and the independence of each component in terms of ease of replacement: cabinet body, mechanism components, arc extinguishing chamber and insulating parts.

[0045] A method for evaluating the life extension potential of a switchgear, such as Figure 1 , including the following steps:

[0046] Step S1, based on the life extension potential evaluation of each component of the switch cabinet, collect the historical operation and environmental data of each component, count the failures / defects of the same period and the same model, family defects, implementation of anti-accident measures and other information, carry out the opening and closing operation characteristics test of the mechanism components and electrical measurements such as withstand voltage and insulation resistance, record relevant data, and check the deformation, sealing, rust and other conditions of the components;

[0047] Step S2, based on the information obtained through investigation, statistics and tests, and according to the deduction standards and judgment basis in Table 3, deductions are recorded for each component;

[0048] Step S3, summing up the deduction records of each component in step S2 to obtain the actual deduction value of each component, and judging the life extension potential of each component according to the component life extension potential evaluation standard in Table 1 to obtain the life extension potential evaluation level of each component;

[0049] Step S4, adding the actual deduction points of each component in step S3 to obtain the total deduction point value of the switch cabinet equipment as a whole, and obtaining the overall life extension potential evaluation level of the switch cabinet according to the overall life extension potential evaluation standard of the switch cabinet in Table 2;

[0050] Step S5, formulate corresponding measures according to the evaluation level:

[0051] For switchgear with a poor overall life extension potential evaluation level, no life extension plan will be adopted and it will be replaced or scrapped in accordance with regulations;

[0052] For switchgear with an overall life extension potential evaluation grade of excellent, we will carry out equipment life extension economic evaluation, establish a decision support model based on a multi-objective decision model and a fuzzy comprehensive evaluation model, formulate a life extension strategy for key switchgear components, and extend the service life of the equipment through repair, renewal, and replacement of key switchgear components;

[0053] For switchgear with an overall life extension potential evaluation level of medium, an economic evaluation of equipment life extension is carried out, and the cost-effectiveness of the life extension project, including equipment purchase cost, maintenance cost, downtime cost, failure cost and potential benefits, is considered to decide whether to extend the life of the equipment.

[0054] The life extension potential of components and the whole is determined based on the total deduction of the evaluation quantity. The evaluation criteria for the life extension potential of components are shown in Table 1, and the evaluation criteria for the life extension potential of the whole are shown in Table 2.

[0055] a) Based on the total deduction value of the evaluation quantity, the components are divided into three types: large life extension potential, small life extension potential and no life extension potential, see Table 1.

[0056] Table 1

[0057]

[0058]

[0059] b) According to the total deduction value of the evaluation quantity, the overall life extension potential of the equipment is divided into three levels: excellent, medium and poor, see Table 2;

[0060] Table 2

[0061] Total deduction points ＜20 [20,60) ≥60 Life extension potential rating excellent middle Difference

[0062] c) The specific evaluation values ​​and deduction standards for the life extension potential of components and the whole are shown in Table 3;

[0063] Table 3

[0064]

[0065]

[0066]

[0067] d) The operation and test results mentioned in Table 3 must be test data within 2 years, otherwise the relevant tests and inspections need to be carried out again.

[0068] Example 2

[0069] This embodiment relates to a switch cabinet life extension potential evaluation device, such as Figure 2 The device includes a data acquisition module 1, a life extension potential evaluation module 2 and a measure generation module 3 which are connected in sequence.

[0070] Data acquisition module 1 obtains the historical operation and environmental data of each component based on the life extension potential evaluation of each component of the switch cabinet, and statistics the failures / defects of the same period and the same model of components, family defects, implementation of anti-accident measures and other information, obtains the opening and closing operation characteristic test of the mechanism components and electrical measurement data such as withstand voltage and insulation resistance, and obtains data on component deformation, sealing, rust and other data.

[0071] The life extension potential evaluation module 2 calculates the deduction points for each component based on the data received from the data acquisition module 1, according to the deduction standards and judgment basis, and adds up the actual deduction values ​​of each component to obtain the total deduction value of a certain switch cabinet equipment as a whole. According to the overall life extension potential evaluation standard of the switch cabinet in Table 2, the overall life extension potential evaluation level of the switch cabinet is obtained, and the evaluation levels include excellent, medium and poor.

[0072] Measures generation module 3 formulates corresponding measures according to the evaluation level, including:

[0073] 1) For switchgear with poor life extension evaluation, no life extension plan will be adopted, that is, replacement and scrapping will be carried out in accordance with regulations;

[0074] 2) For switchgear with excellent life extension evaluation, output the plan for carrying out equipment life extension economic evaluation, establish a decision support model based on multi-objective decision model and fuzzy comprehensive evaluation model, formulate life extension strategy for key components of switchgear, and extend the service life of equipment through maintenance, updating and replacement of key components of switchgear;

[0075] 3) For switchgear with life extension evaluation in the middle, output the plan for economic evaluation of equipment life extension, comprehensively consider the cost-effectiveness of the life extension project including equipment purchase cost, maintenance cost, downtime cost, failure cost and potential benefits, and decide whether to extend the life of the equipment.

[0076] Example 3

[0077] The electronic device of the present invention includes a central processing unit (CPU), which can perform various appropriate actions and processes according to computer program instructions stored in a read-only memory (ROM) or loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for device operation can also be stored. The CPU, ROM and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0078] Multiple components in the device are connected to the I / O interface, including: input units, such as keyboards, mice, etc.; output units, such as various types of displays, speakers, etc.; storage units, such as disks, optical disks, etc.; and communication units, such as network cards, modems, wireless communication transceivers, etc. The communication unit allows the device to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunication networks.

[0079] The processing unit performs the various methods and processes described above, such as methods S1 to S5. For example, in some embodiments, methods S1 to S5 may be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit. In some embodiments, part or all of the computer program may be loaded and / or installed on the device via a ROM and / or a communication unit. When the computer program is loaded into the RAM and executed by the CPU, one or more steps of methods S1 to S5 described above may be performed. Alternatively, in other embodiments, the CPU may be configured to execute methods S1 to S5 in any other appropriate manner (e.g., by means of firmware).

[0080] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0081] The program code for implementing the method of the present invention can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code can be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

[0082] In the context of the present invention, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0083] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for evaluating the life extension potential of a switch cabinet, characterized in that: The method comprises the following steps: Step S1, according to the life extension potential evaluation of each component of the switch cabinet, collect the historical operation data, environmental data and test data of each component, and count the fault data, defect data, anti-accident measure execution data, spare parts data and appearance data of each component, wherein the components of the switch cabinet include the cabinet body, mechanism components, arc extinguishing chamber and insulating parts; Step S2, according to the data obtained in step S1, and according to the deduction standards and judgment basis corresponding to each component of the switch cabinet, deduction calculation is performed for each component; Step S3, summing up the deduction points of each component in step S2 to obtain the deduction points of each component; and obtaining the life extension potential evaluation level of each component according to the component life extension potential evaluation standard; Step S4, adding the deduction points of each component in step S3 to obtain the total deduction point value of the switch cabinet equipment as a whole, and obtaining the overall life extension potential evaluation level of the switch cabinet according to the overall life extension potential evaluation standard of the switch cabinet; Step S5, formulating corresponding measures according to the overall life extension potential evaluation level of the switch cabinet.

2. A switch cabinet life extension potential evaluation method according to claim 1, characterized in that: The evaluation quantities of the cabinet include appearance inspection and rated current during operation, as well as partial discharge detection, voltage withstand test and interlocking performance inspection of the cabinet.

3. The method for evaluating the life extension potential of a switch cabinet according to claim 1, characterized in that: The evaluation quantities of the arc extinguishing chamber include the evaluation quantities during operation, as well as the tests of insulation resistance, withstand voltage test and X-ray detection, wherein the evaluation quantities during operation include the rated short-circuit breaking current, breaking operation current and accumulated breaking fault current.

4. The method for evaluating the life extension potential of a switch cabinet according to claim 1, characterized in that: The evaluation quantities of the mechanism components during operation include the number of operations, the mechanism box, the buffer, the evaluation quantities related to the time characteristics, the evaluation quantities related to the speed characteristics, the three-phase inconsistency protection and the spring mechanism operation; among them, the evaluation quantities related to the time characteristics include the opening time, the closing time, the closing and opening time, the different closing periods between phases, the different opening periods between phases, the different closing periods of the same-phase breaks and the different opening periods of the same-phase breaks; the evaluation quantities related to the speed characteristics include the opening speed and the closing speed.

5. The method for evaluating the life extension potential of a switch cabinet according to claim 1, characterized in that: The evaluation quantity of the insulating parts during operation includes whether a set proportion of the insulating parts have discharge marks, cracks or damage on their appearance.

6. The method for evaluating the life extension potential of a switch cabinet according to claim 1, characterized in that: The historical operation data and test data are test data within N years.

7. The method for evaluating the life extension potential of a switch cabinet according to claim 1, characterized in that: The overall life extension potential evaluation level of the switch cabinet includes: If the total deduction value of the switchgear equipment as a whole is less than 20, the overall life extension potential evaluation level of the switchgear is excellent; If the total deduction value of the switchgear equipment as a whole is greater than or equal to 60, the overall life extension potential evaluation level of the switchgear is poor; Otherwise, the overall life extension potential evaluation level of the switchgear is medium.

8. The method for evaluating the life extension potential of a switch cabinet according to claim 7, characterized in that: The corresponding measures formulated according to the evaluation level include: Switchgear with a poor overall life extension potential evaluation level shall be replaced or scrapped in accordance with regulations; For switchgear with an overall life extension potential evaluation grade of excellent, a life extension strategy for key switchgear components is formulated to extend the service life of the equipment through repair, renewal, and replacement of key switchgear components; For switchgear with an overall life extension potential evaluation level of medium, the cost-effectiveness of the life extension project, including equipment purchase cost, maintenance cost, downtime cost, failure cost and potential benefits, is considered to decide whether to extend the life of the equipment.

9. A device using the switch cabinet life extension potential evaluation method according to claim 1, the device comprising: The data acquisition module (1) acquires the historical operation and environmental data of each component according to the evaluation of the life extension potential of each component of the switch cabinet, collects statistics on the failures / defects of the same period and the same model of the component, family defects, the implementation of anti-accident measures, etc., acquires the opening and closing operation characteristic test of the mechanism components and the electrical measurement data such as withstand voltage and insulation resistance, and acquires the deformation, sealing, corrosion and other data of the components; The life extension potential evaluation module (2) performs a deduction calculation for each component based on the data received from the data acquisition module (1), the deduction standard and the judgment basis, and adds up the actual deduction values ​​of each component to obtain the total deduction value of the switch cabinet equipment as a whole, and obtains the overall life extension potential evaluation grade of the switch cabinet according to the overall life extension potential evaluation standard of the switch cabinet, and the evaluation grades include excellent, medium and poor; The measure generation module (3) formulates corresponding measures according to the overall life extension potential evaluation level of the switch cabinet, including: 1) For switchgear with poor life extension potential, it shall be replaced or scrapped in accordance with regulations; 2) For switchgear with excellent life extension potential, output a plan for equipment life extension economic evaluation, formulate a life extension strategy for key components of the switchgear, and extend the service life of the equipment through maintenance, updating, replacement and other means of key components of the switchgear; 3) For switchgear with a life extension potential of medium, output a plan for economic evaluation of equipment life extension, comprehensively consider the cost-effectiveness of the life extension project including equipment purchase cost, maintenance cost, downtime cost, failure cost and potential benefits, and decide whether to extend the life of the equipment.

10. An electronic device comprising a memory and a processor, wherein a computer program is stored in the memory, wherein: When the processor executes the program, the method according to claim 9 is implemented.

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