A dynamic management method and device of power secondary equipment recording wave file and a storage medium
By collecting metadata from waveform recording files in secondary power equipment and constructing a structured database, combined with multi-dimensional value scoring and dynamic attenuation mechanisms, the problems of static strategy rigidity and file consistency in waveform recording file management are solved, achieving efficient dynamic management of waveform recording files and priority retention of key data.
Patent Information
- Application Number
- CN202610574655.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-28
- Publication Date
- 2026-07-24
AI Technical Summary
In existing technologies, the management of waveform recording files of secondary power equipment suffers from a rigid static management strategy, which makes it easy to accidentally delete core fault waveform recordings, resulting in inefficient file system management, difficulty in supporting complex queries, and inconsistencies between files and records.
By collecting metadata from waveform recording files and organizing it into a structured format and storing it in an embedded database, a multi-dimensional value scoring model is constructed. Combined with a dynamic attenuation mechanism based on the generation time, dynamic management of waveform recording files is achieved, and a transactional mechanism is used to ensure the consistency of files and data.
It achieves efficient storage and rapid retrieval of waveform recording files, significantly improves management efficiency, effectively distinguishes the value differences of waveform recording files, ensures that waveform recordings of critical faults are retained first, avoids the loss of important data, and solves the consistency problem in traditional management methods.
Smart Images
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of operation and maintenance technology of power system secondary equipment, and particularly relates to a dynamic management method, device and storage medium for waveform recording files of power secondary equipment. Background Technology
[0002] Secondary power equipment (such as relay protection devices and fault recorders) is the core equipment for ensuring the safe and stable operation of the power system. It generates a large number of waveform files during system faults, abnormal operating conditions, or maintenance. These waveform files record key electrical quantity data such as voltage, current, and switching quantities of the power system, which are important bases for fault analysis, equipment condition assessment, and operation and maintenance strategy optimization.
[0003] At present, the management of waveform recording files in substations has the following technical defects: (1) Static management strategy is rigid: the number of records to be retained is preset according to type, and if the number is exceeded, the earliest record is deleted in sequence according to the specific waveform recording type. It does not distinguish the actual value of waveform recordings of the same type, which makes it easy to delete core fault waveforms by mistake; (2) File system management is inefficient: the traditional method of managing metadata through text records or linked lists and file structures is difficult to support complex queries such as "counting by type" and "sorting by value", and is prone to problems of inconsistency between files and records.
[0004] Therefore, there is an urgent need to design an efficient and dynamic management method for waveform recording files. Summary of the Invention
[0005] The purpose of this invention is to provide a dynamic management method, device and storage medium for waveform recording files of power secondary equipment. It quantifies the value of waveform recording files through multi-dimensional value scoring logic, realizes intelligent deletion decisions by combining industry standard quantity constraints, and uses a transactional mechanism to ensure the consistency of files and data, thereby achieving refined dynamic management of waveform recording files throughout their entire lifecycle.
[0006] To achieve the above objectives, the present invention is implemented using the following technical solution:
[0007] In a first aspect, the present invention provides a method for dynamic management of waveform recording files of power secondary equipment, comprising:
[0008] Metadata of the recorded waveform files is collected and organized into structured metadata and stored in an embedded database; wherein, the metadata includes waveform type, generation time and characteristic data of at least two types of waveform value influencing factors;
[0009] The comprehensive value score of the waveform recording file is calculated based on the structured metadata. The comprehensive value score is obtained based on the basic weight corresponding to the waveform recording type and the influence weight of various waveform recording value influence factors, and is dynamically decayed according to the length of time the waveform recording file was generated.
[0010] The number of waveform recording files in the structured metadata is verified for compliance. If it is not compliant, a list of waveform recording files to be deleted is obtained based on the comprehensive value score.
[0011] According to the list of waveform recording files to be deleted, low-value waveform recording files are deleted according to the preset deletion transaction mechanism, and the waveform recording file metadata records in the embedded database are updated.
[0012] Optionally, the step of calculating the comprehensive value score of the waveform recording file based on structured metadata includes:
[0013] Read the data from the waveform recording data table, calculate the basic score based on the recording type of the waveform recording file in the structured metadata, and calculate the corresponding impact score based on the waveform recording value impact factor in the structured metadata;
[0014] The base score and the influence score are summed to obtain the total score. The total score is then dynamically decayed using a time decay function to obtain a comprehensive value score. The value of the time decay function is positively correlated with the timestamp generated by the waveform file.
[0015] Optionally, the formula for calculating the comprehensive value score of the waveform recording file is:
[0016] ,
[0017] in, To score the overall value of the waveform recording file, Let be the time decay function. , The basic score for the waveform recording type of the waveform recording file. An index for the influence factors of waveform value. The number of factors affecting the value of recorded waves, ≥2, For the recorded waveform file The impact score of the value influence factor of individual recording waves.
[0018] Optionally, the time decay function adopts a linear decay method, and the calculation formula is as follows:
[0019] ,
[0020] in, This is the current timestamp. Generate timestamps for the waveform recording files. The preset decay period; when the time difference exceeds the decay period hour, Take the minimum value of 0.1.
[0021] Optionally, the waveform value influencing factors include the importance of the power events associated with the waveform file, the query popularity, and the storage space occupied.
[0022] Optionally, the compliance verification of the number of waveform files in the structured metadata includes:
[0023] The current number of recorded files for each type is counted separately according to the recording type; wherein, the recording type includes action recording, startup recording, and maintenance recording.
[0024] If the current number of a certain type of waveform recording file is not greater than the preset minimum retention number of that type of waveform recording file, then the number of waveform recording files of the corresponding type is compliant.
[0025] If the current number of a certain type of waveform recording file is greater than the preset minimum retention number of that type of waveform recording file, then the number of waveform recording files of that type is not compliant.
[0026] Optionally, the list of waveform recording files to be deleted is obtained based on the comprehensive value score, including: selecting the files with the lowest comprehensive value score from the waveform recording files of the non-compliant quantity type and including them in the list to be deleted, and ensuring that the number of waveform recording files of the corresponding type after deletion is not less than the preset minimum retention number.
[0027] Optionally, the step of deleting low-value waveform recording files according to the list of waveform recording files to be deleted, following a preset deletion transaction mechanism, and updating the waveform recording file metadata records in the embedded database, includes:
[0028] To initiate a database transaction, execute the following steps in sequence:
[0029] Find the storage path corresponding to the waveform recording file to be deleted;
[0030] Delete the locally stored waveform recording file according to the storage path;
[0031] Delete the metadata record corresponding to the waveform recording file to be deleted in the embedded database;
[0032] If any of the above steps fail, a database transaction rollback is triggered to undo the executed steps and ensure the consistency between the physical storage of the waveform file and the database metadata records.
[0033] Secondly, the present invention provides a dynamic management device for waveform recording files of power secondary equipment, comprising:
[0034] Structured metadata storage module: used to collect metadata from waveform recording files and organize it into structured metadata for storage in an embedded database; wherein, the metadata includes waveform recording type, generation time, and characteristic data of at least two types of waveform recording value influencing factors;
[0035] Waveform recording file value scoring module: used to calculate the comprehensive value score of the waveform recording file based on structured metadata; wherein, the comprehensive value score is obtained based on the basic weight corresponding to the waveform recording type and the influence weight corresponding to the various waveform recording value influence factors, and is dynamically decayed according to the waveform recording file generation time length;
[0036] Waveform recording file quantity verification module: used to verify the compliance of the number of waveform recording files in the structured metadata. If it is not compliant, a list of waveform recording files to be deleted is obtained based on the comprehensive value score.
[0037] Database storage management module: used to delete low-value waveform recording files according to the list of waveform recording files to be deleted, and to update the waveform recording file metadata records in the embedded database.
[0038] Thirdly, the present invention provides a computer storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the dynamic management method for recording waveforms of power secondary equipment as described in any of the first aspects is implemented.
[0039] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: By collecting metadata from waveform recording files and organizing it into a structured format for storage in an embedded database, compared with traditional text recording or linked list management methods, efficient storage and rapid retrieval of waveform recording file metadata are achieved, significantly improving management efficiency; by constructing a comprehensive value scoring model that includes basic weights for waveform recording types and multiple waveform recording value influencing factors, and introducing a dynamic decay mechanism based on generation time, the shortcomings of traditional static management strategies in distinguishing the value differences of waveform recording files of the same type are effectively solved, realizing the quantitative stratification and dynamic evaluation of waveform recording file value, ensuring critical fault... Waveform recordings are prioritized for retention even when storage space is limited. By performing compliance checks on the number of waveform recording files and making dynamic deletion decisions based on industry standard specifications for the minimum retention quantity of action waveform recordings, startup waveform recordings, and maintenance waveform recordings, storage resources are optimized and the risk of losing important data due to blind deletion is avoided. Low-value waveform recording files are deleted through a preset deletion transaction mechanism, and metadata records in the embedded database are updated simultaneously. The atomicity of database transactions ensures the consistency between "physical file deletion" and "metadata record update", eliminating the common file and record synchronization problems in traditional management methods. Attached Figure Description
[0040] Figure 1 The diagram shown is a flowchart of a dynamic management method for waveform recording files of power secondary equipment in one embodiment of the present invention. Detailed Implementation
[0041] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.
[0042] Example 1
[0043] like Figure 1 As shown in the figure, this embodiment provides a method for dynamic management of waveform recording files of power secondary equipment. The specific steps are as follows:
[0044] Step S1, Metadata Collection: Poll the waveform recording file directory of the secondary equipment at a frequency of 1 minute / time. Newly generated waveform recording files automatically trigger metadata collection. After collection, the metadata is stored in a lightweight embedded database in a structured format. If collection fails, log is recorded and the process is retried 3 times. The metadata includes file ID, waveform recording type, generation timestamp, characteristic data of waveform recording value impact factor, associated event tags, number of queries (initial value is 0), and file size. The waveform recording type is divided into five categories: action waveform recording, start waveform recording, maintenance waveform recording, independent waveform recording, and invalid waveform recording. The generation timestamp is accurate to the millisecond level. The characteristic data of waveform recording value impact factor includes the type code of associated power events, historical query count statistics, file size, etc.
[0045] In this embodiment, SQLite3 is used as an embedded database to store metadata. The embedded database contains a wave_record_metadata table with fields including file ID, wave recording type, generation timestamp, event code, query count, file size, and overall score. It also supports multi-condition queries to provide data support for subsequent scoring and decision-making.
[0046] Step S2, Comprehensive Value Scoring: A scheduled task is executed daily. At 00:00 each day, a preset scoring formula is used to calculate the comprehensive score for the waveform recording files added the previous day. After calculation, the comprehensive score is written back to the corresponding field in the waveform recording data table. If data is missing during the scoring process (e.g., no event label), the corresponding factor score is recorded as 0. The scoring formula is:
[0047] ,
[0048] in, Score the overall value of the waveform recording file; The basic score for the waveform recording type of the waveform recording file. Specific values can be preset, such as: 60 minutes of action recording, 40 minutes of startup recording, and 30 minutes of maintenance recording; An index of the factors influencing the value of waveform recording; The number of factors affecting the value of recorded waves, ≥2, For the recorded waveform file The impact score of the value influence factor of individual record waves; Let be the time decay function. Time decay function A linear decay method can be used, as shown in the example formula:
[0049] ,
[0050] in, This is the current timestamp; Generate timestamps for the waveform recording files; The attenuation period can be manually adjusted through the system configuration interface to adapt to the operation and maintenance needs of different substations. When the time difference exceeds the attenuation period... hour, Take the minimum value of 0.1.
[0051] Step S3, Deletion Decision Pre-Verification: When the storage capacity reaches the preset threshold limit, a database statistical query is triggered to count the number of records by waveform type. During verification, the minimum retention quantity configured by the system is read (action waveforms ≥ 20, startup waveforms ≥ 10, maintenance waveforms ≥ 10). If the number of records meets the constraints, proceed to the next step; otherwise, terminate the deletion process.
[0052] Step S4, Dynamic Deletion Decision: Files are sorted in ascending order of their overall score by waveform type. The process begins with the file with the lowest score and continues until the remaining file count equals the minimum retention quantity. For example, if there are 25 action waveform records, the 5 records with the lowest overall score in that type are selected and added to the deletion list. If there are 10 startup waveform records, deletion of all files in that type is prohibited. A deletion list is generated during the filtering process and undergoes secondary verification to ensure no high-value files are mistakenly included. The final deletion list is uniquely identified by the file ID.
[0053] Step S5, Transactional Deletion Execution: Start a database transaction and sequentially execute the operations of querying the file storage path, deleting the local file, and deleting the database metadata record. If any step fails, a transaction rollback is triggered to undo the executed operations and record the reason for the failure in the operation and maintenance log to avoid inconsistency between data and files. For example, if an exception occurs when deleting the local file, a transaction rollback is triggered immediately, and the deleted database record will be automatically restored.
[0054] Step S6, Data Synchronization Feedback: After the deletion operation is completed, the deletion results (number of successful deletions and number of failed deletions) are fed back to the database, the inventory statistics of each type of waveform file are updated, and an operation and maintenance report is generated and pushed to the substation operation and maintenance terminal.
[0055] The following example illustrates the solution of the present invention in detail:
[0056] Assume that at 09:23:45 on August 15, 2024, the relay protection device "PL22030A" detects a "differential protection action" and generates one action waveform file. The physical path of the file is " / data / Comtrade / PL22030A_RCD_7979_20240815_092345_024_f.dat", and the file size is 388608 bytes. This waveform is recalled once. In this embodiment, the waveform value influence factor is set to the importance level of the event associated with the waveform file and the query popularity of the waveform file. The time decay function is set as follows, with decay period... Take 90 days; when the time difference exceeds 90 days, Take the minimum value of 0.1, that is:
[0057] ,
[0058] The scoring values for waveform recording types are set as follows: 50.00 points for action waveform recording, 30.00 points for startup waveform recording, and 20.00 points for maintenance waveform recording. The scoring principles for associated fault events are shown in Table 1.
[0059] Table 1
[0060] Category II major failure events 40.00 points Three types of major failure events 30.00 points Common Fault Events 20.00 points Unrelated fault events 0.00 points
[0061] The scoring principle for query popularity is set as follows:
[0062] .
[0063] When a new waveform file is detected, the waveform metadata is collected and then organized into a structured format as shown in Table 2 according to preset fields.
[0064] Table 2
[0065] Waveform recording type 1 (Motion Recording Wave) Generation time 1723713825000 (August 15, 2024, 09:23:45, millisecond-level UTC timestamp) Related power event levels E001 (Major Fault Event) Related power event levels 0 (Initial query count) File size 388608 Overall Value Score 0.00 (No rating)
[0066] Structured metadata is written into the waveform data table in the embedded database using SQL statements.
[0067] At 00:00:00 on August 16, 2024, a timed comprehensive value scoring operation for waveform recording files will be triggered (if the waveform recording exceeds the preset storage limit after its generation, the comprehensive value scoring operation will be triggered immediately). The generation time, associated power event level, and query count will be read from the waveform recording data table.
[0068] Based on the current timestamp, the waveform generation timestamp, and the 90-day attenuation period, the time attenuation coefficient is calculated to be 0.9932. The waveform recording type is action recording, with a value of 50.00 points. The associated fault event includes differential protection action, defined as a major fault event, with a value of 50.00 points. The query popularity score is calculated to be 10.00 points. The comprehensive value score is calculated according to the scoring formula and then updated back into the waveform recording data table. The comprehensive value score is calculated as follows:
[0069] .
[0070] Suppose a new waveform recording file is generated at 09:23:45 on August 16, 2025, just exceeding the storage limit. Immediately calculate the comprehensive value score of the waveform recording file generated at this time last year:
[0071] .
[0072] If the waveform file happens to be the last deletable waveform file in the score, then the file deletion operation is initiated. First, the absolute path of the file is retrieved, and the file deletion interface is called to delete the file. After successful deletion, the database record for that file is deleted. When all steps have been executed successfully, the transaction is committed.
[0073] Finally, a deletion operation report is generated and written to the secondary equipment operation and maintenance log.
[0074] Example 2
[0075] This embodiment provides a dynamic management device for waveform recording files of power secondary equipment, including:
[0076] Structured metadata storage module: used to collect metadata from waveform recording files and organize it into structured metadata for storage in an embedded database; wherein, the metadata includes waveform recording type, generation time, and characteristic data of at least two types of waveform recording value influencing factors;
[0077] Waveform recording file value scoring module: used to calculate the comprehensive value score of the waveform recording file based on structured metadata; wherein, the comprehensive value score is obtained based on the basic weight corresponding to the waveform recording type and the influence weight corresponding to the various waveform recording value influence factors, and is dynamically decayed according to the waveform recording file generation time length;
[0078] Waveform recording file quantity verification module: used to verify the compliance of the number of waveform recording files in the structured metadata. If it is not compliant, a list of waveform recording files to be deleted is obtained based on the comprehensive value score.
[0079] Database storage management module: used to delete low-value waveform recording files according to the list of waveform recording files to be deleted, and to update the waveform recording file metadata records in the embedded database.
[0080] The device provided in this embodiment can execute the dynamic management method for waveform recording files of power secondary equipment provided in any step of Embodiment 1, and has the corresponding functional modules and beneficial effects of the execution method.
[0081] Example 3
[0082] This embodiment provides a computer storage medium storing a computer program. When the computer program is executed by a processor, it implements the dynamic management method for recording waveforms of power secondary equipment as provided in any step of Embodiment 1.
[0083] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0084] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0085] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0086] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0087] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.
Claims
1. A method for dynamic management of waveform recording files of secondary power equipment, characterized in that, include: Metadata of the recorded waveform files is collected and organized into structured metadata and stored in an embedded database; wherein, the metadata includes waveform type, generation time and characteristic data of at least two types of waveform value influencing factors; The comprehensive value score of the waveform recording file is calculated based on the structured metadata. The comprehensive value score is obtained based on the basic weight corresponding to the waveform recording type and the influence weight of various waveform recording value influence factors, and is dynamically decayed according to the length of time the waveform recording file was generated. The number of waveform recording files in the structured metadata is verified for compliance. If it is not compliant, a list of waveform recording files to be deleted is obtained based on the comprehensive value score. According to the list of waveform recording files to be deleted, low-value waveform recording files are deleted according to the preset deletion transaction mechanism, and the waveform recording file metadata records in the embedded database are updated.
2. The dynamic management method for waveform recording files of power secondary equipment according to claim 1, characterized in that, The calculation of the comprehensive value score of the waveform recording file based on structured metadata includes: Read the data from the waveform recording data table, calculate the basic score based on the recording type of the waveform recording file in the structured metadata, and calculate the corresponding impact score based on the waveform recording value impact factor in the structured metadata; The base score and the influence score are summed to obtain the total score. The total score is then dynamically decayed using a time decay function to obtain a comprehensive value score. The value of the time decay function is positively correlated with the timestamp generated by the waveform file.
3. The dynamic management method for waveform recording files of power secondary equipment according to claim 2, characterized in that, The formula for calculating the comprehensive value score of the waveform recording file is as follows: ， in, To score the overall value of the waveform recording file, Let be the time decay function. , The basic score for the waveform recording type of the waveform recording file. An index for the influence factors of waveform value. The number of factors affecting the value of recorded waves, ≥2, For the recorded waveform file The impact score of the value influence factor of individual recording waves.
4. The dynamic management method for waveform recording files of power secondary equipment according to claim 2, characterized in that, The time decay function adopts a linear decay method, and the calculation formula is as follows: ， in, This is the current timestamp. Generate timestamps for the waveform recording files. The preset decay period; when the time difference exceeds the decay period hour, Take the minimum value of 0.
1.
5. The dynamic management method for waveform recording files of power secondary equipment according to claim 1, characterized in that, The influencing factors of the waveform recording value include the importance of the power events associated with the waveform recording file, the search popularity, and the amount of storage space occupied.
6. The dynamic management method for waveform recording files of power secondary equipment according to claim 1, characterized in that, The compliance verification of the number of waveform files in the structured metadata includes: The current number of recorded files for each type is counted separately according to the recording type; wherein, the recording type includes action recording, startup recording, and maintenance recording. If the current number of a certain type of waveform recording file is not greater than the preset minimum retention number of that type of waveform recording file, then the number of waveform recording files of the corresponding type is compliant. If the current number of a certain type of waveform recording file is greater than the preset minimum retention number of that type of waveform recording file, then the number of waveform recording files of that type is not compliant.
7. The dynamic management method for waveform recording files of power secondary equipment according to claim 6, characterized in that, The process of obtaining a list of waveform recording files to be deleted based on the comprehensive value score includes: selecting the files with the lowest comprehensive value score from the waveform recording files of the non-compliant quantity type and including them in the list to be deleted, and ensuring that the number of waveform recording files of the corresponding type after deletion is not less than the preset minimum retention number.
8. The method for dynamic management of waveform recording files of power secondary equipment according to claim 1, characterized in that, The step of deleting low-value waveform recording files according to the list of waveform recording files to be deleted, following a preset deletion transaction mechanism, and updating the waveform recording file metadata records in the embedded database includes: To initiate a database transaction, execute the following steps in sequence: Find the storage path corresponding to the waveform recording file to be deleted; Delete the locally stored waveform recording file according to the storage path; Delete the metadata record corresponding to the waveform recording file to be deleted in the embedded database; If any of the above steps fail, a database transaction rollback is triggered to undo the executed steps and ensure the consistency between the physical storage of the waveform file and the database metadata records.
9. A dynamic management device for waveform recording files of power secondary equipment, characterized in that, include: Structured metadata storage module: used to collect metadata from waveform recording files and organize it into structured metadata for storage in an embedded database; wherein, the metadata includes waveform recording type, generation time, and characteristic data of at least two types of waveform recording value influencing factors; Waveform recording file value scoring module: used to calculate the comprehensive value score of the waveform recording file based on structured metadata; wherein, the comprehensive value score is obtained based on the basic weight corresponding to the waveform recording type and the influence weight corresponding to the various waveform recording value influence factors, and is dynamically decayed according to the waveform recording file generation time length; Waveform recording file quantity verification module: used to verify the compliance of the number of waveform recording files in the structured metadata. If it is not compliant, a list of waveform recording files to be deleted is obtained based on the comprehensive value score. Database storage management module: used to delete low-value waveform recording files according to the list of waveform recording files to be deleted, and to update the waveform recording file metadata records in the embedded database.
10. A computer storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the dynamic management method for waveform recording files of power secondary equipment as described in any one of claims 1-8.