Open-type current transformer maintenance method suitable for power transformation and distribution station

Abstract

The invention relates to the technical field of electric power maintenance, and discloses an open-type current transformer maintenance method suitable for a power transformation and distribution station, and the method comprises the following steps: S1, determining an inspection period: determining a suitable inspection period according to the use condition and operation environment of a current transformer and the common negotiation of safety inspection personnel of an equipment user; s2, inspection environment preparation: according to the actual situation of a power transformation and distribution station where equipment is located, proper time and place are selected to carry out maintenance operation, and on the premise of safe construction, influences possibly brought by environmental factors such as weather and traffic are reduced; and S3, the current transformer is dismantled, specifically, the current transformer is dismantled according to the required step sequence by using a proper tool, and safety measures are taken in the whole process. According to the invention, potential faults of the current transformer can be found and eliminated in time through the maintenance and inspection process of the system, so that the safety of equipment is improved, and the possibility of accidents is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power maintenance, and particularly relates to a maintenance method for an open-type current transformer applicable to a power transformation and distribution station. BACKGROUND

[0002] As one of the important devices in the power system, current transformers are widely used in current measurement, protection and monitoring of power transformation and distribution stations. They convert high current into low current signals to provide important input for relay protection, measurement and control systems. With the development of the power system, the performance requirements of current transformers are continuously improved, especially in terms of safety, reliability and maintenance convenience. Therefore, research and implementation of effective maintenance methods are crucial to ensure the normal operation of current transformers.

[0003] Traditional maintenance of current transformers mainly relies on periodic inspection and manual evaluation, which usually includes appearance inspection, insulation performance test and electrical function detection. These inspections often lack systematicness and standardization, and maintenance personnel need to make judgments based on experience, which affects the reliability and accuracy of the inspection results. In addition, the traditional maintenance process lacks attention to environmental factors and safety measures, which may cause safety hazards. In terms of data recording, many device maintenance still relies on manual recording, lacking effective data management and analysis means, which leads to unscientific and unreasonable maintenance decisions.

[0004] The defects of the prior art mainly lie in the non-systematic and non-standardized maintenance process, which makes it difficult to ensure the safety and stability of the current transformer. Although the traditional method of periodic inspection of the device can reduce the risk of failure to a certain extent, due to the lack of scientific data analysis and recording, potential problems cannot be found in time, maintenance opportunities are delayed, and the probability of failure is increased. In addition, the safety measures in the traditional maintenance process are not implemented, which easily causes potential threats to maintenance personnel and equipment. Therefore, a systematic and standardized maintenance scheme is urgently needed, combined with data-driven management methods, to improve the maintenance efficiency and safety of the current transformer, so as to ensure the normal operation of the power system. SUMMARY

[0005] The present application mainly solves the technical problems existing in the prior art, and provides a maintenance method for an open-type current transformer applicable to a power transformation and distribution station.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a maintenance method for open-type current transformers suitable for substations, implemented through the following steps: Step S1, Determine the inspection cycle: Based on the usage and operating environment of the current transformer, discuss with the safety inspection personnel of the equipment user to determine a suitable inspection cycle; Step S2, Prepare the inspection environment: Based on the actual situation of the substation where the equipment is located, select a suitable time and place for maintenance work, minimizing the impact of environmental factors such as weather and traffic under the premise of safe construction; Step S3, Remove the current transformer: Using appropriate tools, remove the current transformer according to the required steps, taking safety measures throughout the process; Step S4, Inspect the current transformer: Using inspection tools, inspect according to standards... The inspection process and methods are as follows: a comprehensive inspection of the current transformer is conducted, including visual inspection, insulation testing, terminal tightness testing, mechanical condition testing, and electronic function testing, to ensure normal equipment operation; Step S5, Inspection Record: Record the inspection results and compile an inspection report; Step S6, Record Data: Organize and store the data from the current transformer inspection records to provide a reference for subsequent maintenance and analysis; Step S7, Post-Inspection Review: Reinstall the current transformer and restore it to its pre-inspection state; Step S8, Inspection Summary: Analyze the current inspection data and historical monitoring data to determine the equipment's operating status; Step S9, Determine Maintenance Plan: Based on the equipment's operating status, formulate an appropriate maintenance plan to ensure the safe and normal use of the current transformer.

[0007] Preferably, in step S3, maintenance and inspection personnel should carry appropriate tools, including wrenches, screwdrivers, and dial indicators, and use appropriate tools to perform maintenance and inspection on the current transformer.

[0008] In step S3, maintenance and inspection personnel use inspection tools to remove each component sequentially, starting from the periphery of the current transformer, following a standardized procedure. Safety measures are taken throughout the process to ensure safety during maintenance.

[0009] In step S3, the current transformer mainly includes the current transformer body, secondary connection wires and transformer base; when maintaining and inspecting the current transformer, it needs to be disassembled into three parts and each part needs to be inspected.

[0010] Preferably, in step 4, the inspection tools mainly include: (a) visual inspection: the inspection tools include a telescope and a camera / video camera; by observation, shooting or recording, the integrity of the current transformer's appearance, and the damage, deformation, scratches and corrosion of electrical components are checked; (b) insulation testing: the electrical insulation performance of the current transformer is tested using an infrared imager, insulation layer thickness tester, AC high voltage megohmmeter, insulation resistance tester and insulating oil tester; (c) terminal tightness testing: the connecting nuts are checked with a wrench to ensure tightness and looseness; (d) mechanical condition testing: the movement of mechanical components is checked with a dial indicator, including displacement, deformation and accuracy; (e) electronic function testing: the electronic functions of the current transformer are tested with a tester, including error, phase-to-phase short circuit, AC short circuit and DC short circuit.

[0011] Preferably, in step 5, the inspection record includes the inspection and recording of the inspection tools to ensure the accuracy and reliability of the test data and avoid misjudgment of maintenance; the inspection record also includes the inspection record of the current transformer, which records in detail the various inspection conditions of the current transformer, including fault points, maintenance opinions and the next inspection time.

[0012] Preferably, in step 5, the inspection record also includes the recording of historical monitoring data of the current transformer and the establishment of a current transformer database, including: (a) operation record: organizing the working history and operating status of the current transformer, including installation date, operating status, fault repair records and protection status; (b) inspection report: classifying and archiving the inspection report, including the inspection results and image files of each inspection tool, to facilitate subsequent analysis and maintenance; (c) maintenance record: tracking and recording the process of each maintenance, including maintenance personnel, maintenance time, maintenance content, inspection status and fault handling status; (d) diagnostic report: diagnosing and evaluating the status and performance of the current transformer based on the inspection and analysis results, and proposing maintenance suggestions and plans based on the diagnostic results to guide subsequent maintenance.

[0013] Preferably, in step 6, the data and images involved in the inspection and diagnostic reports are classified and stored in a structured manner: (a) Data entry: The data and images involved in the inspection record table are entered according to a standardized format and organized into an electronic spreadsheet; (b) Data processing: Data analysis is performed according to maintenance needs, and the fault data relationship of different parts, the fault frequency and fault distribution of different equipment are compared and analyzed for the main fault types of current transformers; (c) Data storage: The processed inspection record data is stored on a server or cloud platform and accessed through a dedicated interface. Maintenance engineers can query historical inspection records in a timely manner and use the diagnostic results to propose maintenance suggestions and plans; (d) Data protection: To protect data security, the data stored on the server needs to be encrypted, and access permissions are set as needed to ensure data security and confidentiality.

[0014] Preferably, in step 6, the maintenance and inspection historical data is cleaned up regularly to reduce storage capacity and improve data processing efficiency.

[0015] Preferably, step 8 involves summarizing and analyzing current inspection data and historical monitoring data, including: (a) historical data comparison: comparing current inspection data with historical monitoring data to obtain the performance change trend and fault distribution of the current transformer at different time points; (b) performance evaluation: conducting an overall evaluation of the performance of the current transformer, and judging the safety, stability, and efficiency of the current transformer based on the inspection data; (c) fault analysis: for the fault types in the inspection report, obtaining similar fault analysis from historical inspection records, and proposing targeted maintenance suggestions based on the analysis results; (d) maintenance recommendation: comprehensively considering the inspection situation, fault analysis, and equipment operation history, proposing maintenance recommendations for the current transformer, including maintenance time, maintenance items, and maintenance methods.

[0016] Preferably, in step 9, a maintenance plan is proposed for the current transformer based on the inspection summary results, including: (a) maintenance content: determining the maintenance time, maintenance items, and maintenance methods according to the maintenance requirements of the current transformer; (b) compiling a maintenance plan: organizing information such as maintenance items, maintenance content, maintenance time, and personnel to be executed into a maintenance plan, including maintenance procedures and precautions; (c) maintenance execution: executing maintenance work according to the maintenance plan, proceeding step by step in sequence to ensure standardized and procedural maintenance operations; (d) maintenance evaluation: evaluating and recording the maintenance work after its completion, and judging the maintenance quality, efficiency, and cost based on the actual work situation; (e) periodic evaluation: comprehensively considering maintenance records and historical data, conducting periodic evaluations of the maintenance plan formulation, optimizing maintenance schemes, improving maintenance efficiency, and reducing costs in fault repair and preventive maintenance.

[0017] Preferably, in step 9, after the maintenance work is completed, a maintenance summary needs to be conducted, which mainly includes: (a) Data organization: organizing maintenance inspection, fault analysis, maintenance operation and inspection data, including maintenance steps, maintenance time, maintenance content, maintenance assessment and execution personnel, etc.; (b) Data archiving: archiving maintenance inspection records, fault analysis reports and maintenance plan formulation documents, and classifying maintenance data into a database for easy use in subsequent maintenance; (c) Regular evaluation: regularly evaluating different equipment and different maintenance plans, and optimizing maintenance plans and schemes based on maintenance effectiveness, fault analysis results and maintenance costs to improve maintenance efficiency; (d) Result feedback: regularly providing feedback on maintenance work evaluation results to maintenance parties, managers and maintenance engineers, and proposing suggestions and improvement measures for inspection reports and maintenance processes to improve maintenance quality.

[0018] In step 9, after the maintenance work is completed, the current transformer also needs to be inspected to ensure that the maintained current transformer can operate safely and stably, including: (a) re-inspection: re-inspect the maintained current transformer to ensure that the maintenance operation meets the standards and there are no abnormalities; (b) restoration inspection: check the installation position and connection status of the current transformer to ensure that the connection is stable and there is no looseness after maintenance; (c) restoration of normal operation: confirm that the maintained current transformer is operating normally and can be put into use, restoring the normal working state of the substation.

[0019] Beneficial effects

[0020] This invention provides a maintenance method for open-type current transformers suitable for substations. It has the following advantages:

[0021] (1) The maintenance method for open-type current transformers applicable to substations can promptly detect and eliminate potential faults of current transformers through a systematic maintenance and inspection process, thereby improving equipment safety, reducing the possibility of accidents, and regular inspection and maintenance can effectively reduce equipment wear and ensure that it operates in the best condition, thereby extending the service life of current transformers and reducing replacement costs.

[0022] (2) This maintenance method for open-type current transformers in substations ensures the normal operation of current transformers through standardized maintenance steps and detailed inspection procedures, thereby ensuring the stable operation of the power system, reducing the risk of power outages, and providing a scientific basis for subsequent maintenance plans and decisions through systematic data recording and analysis, helping maintenance personnel to better judge the equipment status and formulate appropriate maintenance strategies.

[0023] (3) This method for maintaining open-type current transformers in substations forms a maintenance database for current transformers through data entry and storage, which facilitates subsequent query and analysis and promotes the development of equipment maintenance towards informatization and intelligence. Attached Figure Description

[0024] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0025] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0026] Figure 1 This is a maintenance flowchart for the present invention;

[0027] Figure 2 The diagram shows the inspection tool and testing method of the present invention;

[0028] Figure 3 This is a data management flowchart of the present invention;

[0029] Figure 4 This is an analysis chart of the inspection results of the present invention;

[0030] Figure 5 This is a schematic diagram of the maintenance plan for the present invention. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example: A maintenance method for open-type current transformers suitable for substations, such as... Figure 1 -to Figure 5As shown, this is achieved through the following steps: Step S1: Determine the inspection cycle: Based on the usage and operating environment of the current transformer, discuss with the safety inspection personnel of the equipment user to determine a suitable inspection cycle; Step S2: Prepare the inspection environment: Based on the actual situation of the substation where the equipment is located, select a suitable time and place for maintenance work, minimizing the impact of environmental factors such as weather and traffic while ensuring safe construction; Step S3: Remove the current transformer: Using appropriate tools, remove the current transformer according to the required steps, taking safety measures throughout the process; Step S4: Inspect the current transformer: Using inspection tools, conduct a comprehensive inspection of the current transformer according to standard inspection procedures and methods. The process includes visual inspection, insulation testing, terminal tightness testing, mechanical condition testing, and electronic function testing to ensure normal equipment operation; Step S5, Inspection Record: Record the inspection results and compile an inspection report; Step S6, Record Data: Organize and store the data from the current transformer inspection records to provide a reference for subsequent maintenance and analysis; Step S7, Post-Inspection Review: Reinstall the current transformer and restore it to its pre-inspection state; Step S8, Inspection Summary: Analyze the current inspection data and historical monitoring data to determine the equipment's operating status; Step S9, Determine Maintenance Plan: Based on the equipment's operating status, formulate an appropriate maintenance plan to ensure the safe and normal use of the current transformer.

[0033] As a further limitation of this solution, in step S3, maintenance and inspection personnel should carry appropriate tools, including wrenches, screwdrivers, and dial indicators, and use appropriate tools to perform maintenance and inspection on the current transformer.

[0034] In step S3, maintenance and inspection personnel use inspection tools to remove each component sequentially, starting from the periphery of the current transformer, following a standardized procedure. Safety measures are taken throughout the process to ensure safety during maintenance.

[0035] In step S3, the current transformer mainly includes the current transformer body, secondary connection wires and transformer base; when maintaining and inspecting the current transformer, it needs to be disassembled into three parts and each part needs to be inspected.

[0036] As a further limitation of this scheme, the inspection tools in step 4 mainly include: (a) visual inspection: inspection tools include telescopes and cameras / video cameras; by observation, shooting or recording, the integrity of the current transformer's appearance and the damage, deformation, scratches and corrosion of electrical components are checked; (b) insulation testing: the electrical insulation performance of the current transformer is tested using an infrared imager, insulation layer thickness tester, AC high voltage megohmmeter, insulation resistance tester and insulating oil tester; (c) terminal tightness test: the connecting nuts are checked with a wrench to ensure tightness and looseness; (d) mechanical condition test: the movement of mechanical components is checked with a dial indicator, including displacement, deformation and accuracy; (e) electronic function test: the electronic function of the current transformer is tested with a tester, including error, phase-to-phase short circuit, AC short circuit and DC short circuit.

[0037] As a further limitation of this solution, in step 5, the inspection record includes the inspection and recording of the inspection tools to ensure the accuracy and reliability of the test data and avoid misjudgment of maintenance; the inspection record also includes the inspection record of the current transformer, which records in detail the various inspection conditions of the current transformer, including fault points, maintenance opinions and the next inspection time, etc.

[0038] As a further limitation of this scheme, step 5, the inspection record also includes the recording of historical monitoring data of the current transformer and the establishment of a current transformer database, including: (a) operation record: organizing the working history and operating status of the current transformer, including installation date, operating status, fault repair records and protection status; (b) inspection report: classifying and archiving the inspection report, including the inspection results and image files of each inspection tool, to facilitate subsequent analysis and maintenance; (c) maintenance record: tracking and recording the process of each maintenance, including maintenance personnel, maintenance time, maintenance content, inspection status and fault handling status; (d) diagnostic report: diagnosing and evaluating the status and performance of the current transformer based on the inspection and analysis results, and proposing maintenance suggestions and plans based on the diagnostic results to guide subsequent maintenance.

[0039] As a further limitation of this solution, in step 6, the data and images involved in the inspection and diagnostic reports are classified and stored in a structured manner: (a) Data entry: The data and images involved in the inspection record table are entered according to a standardized format and organized into an electronic spreadsheet; (b) Data processing: Data analysis is performed according to maintenance needs, and the fault data relationships of different parts, the fault frequency and fault distribution of different equipment are compared and analyzed for the main fault types of current transformers; (c) Data storage: The processed inspection record data is stored on a server or cloud platform and accessed through a dedicated interface. Maintenance engineers can query historical inspection records in a timely manner and use the diagnostic results to propose maintenance suggestions and plans; (d) Data protection: To protect data security, the data stored on the server needs to be encrypted, and access permissions are set as needed to ensure data security and confidentiality.

[0040] As a further limitation of this solution, in step 6, the maintenance and inspection historical data is cleaned up regularly to reduce storage capacity and improve data processing efficiency.

[0041] As a further limitation of this scheme, step 8, which involves checking, summarizing, and analyzing current inspection data and historical monitoring data, includes: (a) Historical data comparison: comparing current inspection data with historical monitoring data to obtain the performance change trend and fault distribution of the current transformer at different time points; (b) Performance evaluation: conducting an overall evaluation of the performance of the current transformer, and judging the safety, stability, and efficiency of the current transformer based on the inspection data; (c) Fault analysis: for the fault types in the inspection report, obtaining similar fault analysis from historical inspection records, and proposing targeted maintenance suggestions based on the analysis results; (d) Maintenance recommendation: comprehensively considering the inspection situation, fault analysis, and equipment operation history, proposing maintenance recommendations for the current transformer, including maintenance time, maintenance items, and maintenance methods.

[0042] As a further limitation of this scheme, in step 9, a maintenance plan is proposed for the current transformer based on the inspection summary results, including: (a) maintenance content: determining the maintenance time, maintenance items, and maintenance methods according to the maintenance requirements of the current transformer; (b) compiling a maintenance plan: organizing information such as maintenance items, maintenance content, maintenance time, and personnel to be executed into a maintenance plan, including maintenance procedures and precautions; (c) maintenance execution: executing maintenance work according to the maintenance plan, proceeding step by step in sequence to ensure standardized and procedural maintenance operations; (d) maintenance evaluation: evaluating and recording the maintenance work after its completion, and judging the maintenance quality, efficiency, and cost based on the actual work situation; (e) periodic evaluation: comprehensively considering maintenance records and historical data, conducting periodic evaluations of the maintenance plan formulation, optimizing maintenance schemes, improving maintenance efficiency, and reducing costs in fault repair and preventive maintenance.

[0043] As a further limitation of this plan, in step 9, after the maintenance work is completed, a maintenance summary needs to be conducted, which mainly includes: (a) Data organization: organizing maintenance inspection, fault analysis, maintenance operation and inspection data, including maintenance steps, maintenance time, maintenance content, maintenance assessment and execution personnel, etc.; (b) Data archiving: archiving maintenance inspection records, fault analysis reports and maintenance plan formulation documents, and classifying maintenance data into a database for easy use in subsequent maintenance; (c) Regular evaluation: regularly evaluating different equipment and different maintenance plans, and optimizing maintenance plans and schemes based on maintenance effectiveness, fault analysis results and maintenance costs to improve maintenance efficiency; (d) Result feedback: regularly providing feedback on maintenance work evaluation results to maintenance parties, managers and maintenance engineers, and proposing suggestions and improvement measures for inspection reports and maintenance processes to improve maintenance quality.

[0044] In step 9, after the maintenance work is completed, the current transformer also needs to be inspected to ensure that the maintained current transformer can operate safely and stably, including: (a) re-inspection: re-inspect the maintained current transformer to ensure that the maintenance operation meets the standards and there are no abnormalities; (b) restoration inspection: check the installation position and connection status of the current transformer to ensure that the connection is stable and there is no looseness after maintenance; (c) restoration of normal operation: confirm that the maintained current transformer is operating normally and can be put into use, restoring the normal working state of the substation.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A maintenance method for open-type current transformers suitable for substations, characterized in that, The following steps are followed: Step S1: Determine the inspection cycle: Based on the usage and operating environment of the current transformer, discuss with the equipment user's safety inspection personnel to determine a suitable inspection cycle; Step S2: Prepare the inspection environment: Based on the actual situation of the substation where the equipment is located, select a suitable time and location for maintenance work, minimizing the impact of environmental factors such as weather and traffic while ensuring safe construction; Step S3: Remove the current transformer: Using appropriate tools, remove the current transformer according to the required steps, ensuring safety measures are in place throughout the process; Step S4: Inspect the current transformer: Using inspection tools, conduct a comprehensive inspection of the current transformer according to standard inspection procedures and methods, including... The process includes visual inspection, insulation testing, terminal tightness testing, mechanical condition testing, and electronic function testing to ensure normal equipment operation; Step S5, Inspection Record: Record the inspection results and compile an inspection report; Step S6, Data Record: Organize and store the data from the current transformer inspection records to provide a reference for subsequent maintenance and analysis; Step S7, Post-Inspection Review: Reinstall the current transformer and restore it to its pre-inspection state; Step S8, Inspection Summary: Analyze the current inspection data and historical monitoring data to determine the equipment's operating status; Step S9, Determine the Maintenance Plan: Based on the equipment's operating status, formulate an appropriate maintenance plan to ensure the safe and normal use of the current transformer.

2. The maintenance method for open-type current transformers applicable to substations according to claim 1, characterized in that: In step S3, maintenance and inspection personnel should carry appropriate tools, including wrenches, screwdrivers, and dial indicators, and use appropriate tools to perform maintenance and inspection on the current transformer. In step S3, maintenance and inspection personnel use inspection tools to remove each component sequentially, starting from the periphery of the current transformer, following a standardized procedure. Safety measures are taken throughout the process to ensure safety during maintenance. In step S3, the current transformer mainly includes the current transformer body, secondary connection wires and transformer base; when maintaining and inspecting the current transformer, it needs to be disassembled into three parts and each part needs to be inspected.

3. The maintenance method for open-type current transformers applicable to substations according to claim 1, characterized in that: In step 4, the inspection tools mainly include: (a) visual inspection: the inspection tools include telescopes and cameras / video cameras; by observation, shooting or recording, the integrity of the current transformer's appearance and the damage, deformation, scratches and corrosion of electrical components are checked; (b) insulation testing: the electrical insulation performance of the current transformer is tested using an infrared imager, insulation layer thickness tester, AC high voltage megohmmeter, insulation resistance tester and insulating oil tester; (c) terminal tightness test: the connecting nuts are checked with a wrench to ensure tightness and looseness; (d) mechanical condition test: the movement of mechanical components is checked with a dial indicator, including displacement, deformation and accuracy; (e) electronic function test: the electronic function of the current transformer is tested with a tester, including error, phase-to-phase short circuit, AC short circuit and DC short circuit.

4. The maintenance method for open-type current transformers applicable to substations according to claim 1, characterized in that: In step 5, the inspection record includes the inspection and recording of the inspection tools to ensure the accuracy and reliability of the test data and avoid misjudgment of maintenance. The inspection record also includes the inspection record of the current transformer, which records in detail the various inspection conditions of the current transformer, including fault points, maintenance opinions and the next inspection time.

5. The maintenance method for open-type current transformers applicable to substations according to claim 1, characterized in that: In step 5, the inspection record also includes the recording of historical monitoring data of the current transformer and the establishment of a current transformer database, including: (a) Operation record: organizing the working history and operating status of the current transformer, including installation date, operating status, fault repair records and protection status; (b) Inspection report: classifying and archiving the inspection report, including the inspection results and image files of each inspection tool, to facilitate subsequent analysis and maintenance; (c) Maintenance record: tracking and recording the process of each maintenance, including maintenance personnel, maintenance time, maintenance content, inspection status and fault handling status; (d) Diagnostic report: diagnosing and evaluating the status and performance of the current transformer based on the inspection and analysis results, and proposing maintenance suggestions and plans based on the diagnostic results to guide subsequent maintenance.

6. The maintenance method for open-type current transformers applicable to substations according to claim 1, characterized in that: In step 6, the data and images involved in the inspection and diagnostic reports are classified and stored in a structured manner: (a) Data entry: The data and images involved in the inspection record table are entered according to a standardized format and organized into an electronic spreadsheet; (b) Data processing: Data analysis is performed according to maintenance needs, and the fault data relationship of different parts, the fault frequency and fault distribution of different equipment are compared and analyzed for the main fault types of current transformers; (c) Data storage: The processed inspection record data is stored on a server or cloud platform and accessed through a dedicated interface. Maintenance engineers can query historical inspection records in a timely manner and use the diagnostic results to propose maintenance suggestions and plans; (d) Data protection: To protect data security, the server needs to encrypt the data, and access permissions are set as needed to ensure data security and confidentiality.

7. The maintenance method for open-type current transformers applicable to substations according to claim 1, characterized in that: In step 6, the historical data for maintenance and inspection is cleaned up regularly to reduce storage capacity and improve data processing efficiency.

8. A maintenance method for open-type current transformers suitable for substations according to claim 1: characterized in that: In step 8, the current inspection data and historical monitoring data are reviewed and analyzed, including: (a) Historical data comparison: The current inspection data is compared with the historical monitoring data to obtain the performance change trend and fault distribution of the current transformer at different time points; (b) Performance evaluation: The overall performance of the current transformer is evaluated, and the safety, stability and efficiency of the current transformer are judged based on the inspection data; (c) Fault analysis: For the fault types in the inspection report, similar fault analysis is obtained from the historical inspection records, and targeted maintenance suggestions are proposed based on the analysis results; (d) Maintenance recommendation: Taking into account the inspection situation, fault analysis and equipment operation history, maintenance recommendations are proposed for the current transformer, including maintenance time, maintenance items and maintenance methods.

9. The maintenance method for open-type current transformers applicable to substations according to claim 1, characterized in that: In step 9, based on the inspection summary results, a maintenance plan is proposed for the current transformer, including: (a) Maintenance content: Based on the maintenance requirements of the current transformer, determine the maintenance time, maintenance items, and maintenance methods; (b) Maintenance plan preparation: Organize the maintenance items, maintenance content, maintenance time, and personnel to form a maintenance plan, including maintenance procedures and precautions; (c) Maintenance execution: Perform maintenance work according to the maintenance plan, proceeding step by step in sequence to ensure standardized and procedural maintenance operations; (d) Maintenance evaluation: After the maintenance work is completed, evaluate and record the maintenance work, and judge the maintenance quality, efficiency, and cost based on the actual work situation; (e) Periodic evaluation: Taking into account maintenance records and historical data, conduct periodic evaluations of the maintenance plan formulation, optimize maintenance schemes, improve maintenance efficiency, and reduce costs in fault repair and preventive maintenance.

10. The maintenance method for open-type current transformers applicable to substations according to claim 1, characterized in that: In step 9, after the maintenance work is completed, a maintenance summary needs to be prepared, which mainly includes: (a) Data organization: organizing maintenance inspection, fault analysis, maintenance operation and inspection data, including maintenance steps, maintenance time, maintenance content, maintenance assessment and execution personnel, etc.; (b) Data archiving: archiving maintenance inspection records, fault analysis reports and maintenance plan formulation documents, and classifying maintenance data into a database for easy use in subsequent maintenance; (c) Regular evaluation: regularly evaluating different equipment and different maintenance plans, and optimizing maintenance plans and schemes based on maintenance effectiveness, fault analysis results and maintenance costs to improve maintenance efficiency; (d) Result feedback: regularly providing feedback on maintenance work evaluation results to maintenance parties, managers and maintenance engineers, and proposing suggestions and improvement measures for inspection reports and maintenance processes to improve maintenance quality. In step 9, after the maintenance work is completed, the current transformer also needs to be inspected to ensure that the maintained current transformer can operate safely and stably, including: (a) re-inspection: re-inspect the maintained current transformer to ensure that the maintenance operation meets the standards and there are no abnormalities; (b) restoration inspection: check the installation position and connection status of the current transformer to ensure that the connection is stable and there is no looseness after maintenance; (c) restoration of normal operation: confirm that the maintained current transformer is operating normally and can be put into use, restoring the normal working state of the substation.

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