Fault data export and off-line analysis method of power fault oscillograph

Abstract

The invention is suitable for the technical field of power system protection and automation, and provides a fault data exporting and offline analysis method of a power fault oscillograph. The method comprises the following steps: preparing a clean formatted USB flash disk; selecting fault recording data needing to be exported; determining different export modes of the fault recording data according to the configuration of the fault recording device; and carrying out in-depth analysis on the exported fault data by using recording analysis software in the office computer to obtain fault analysis result data. The invention aims at power system microcomputer fault recording devices which are produced by different manufacturers, have different brands, are put into operation in different periods and even have different operation systems.

Description

Technical Field

[0001] The invention relates to the technical field of power system protection and automation, and in particular to a method for exporting fault data of a power fault recorder and an off-line analysis method thereof. Background Art

[0002] At present, according to the "Grid Operation Guidelines" and relevant technical specifications of the power industry, the substations of 110kV and above voltage levels of enterprises under the dispatching and management of regional and higher grid control centers, and the generator sets connected to the 35kV and above voltage level grid should be equipped with microcomputer fault recording devices, which plays a very important role in the safe and reliable operation of the power system. Over the years, the automatic fault recording of the power system has become an important basis for analyzing system accidents, especially the analysis of relay protection action behavior. In particular, the microcomputer-based fault recording device can record the information of the electrical quantity and state change process before and after the grid fault occurs, fully reflect the instantaneous changes after the fault and the action behavior of the relay protection, and have the ability to archive and reanalyze data.

[0003] However, the microcomputer-based fault recording devices put into operation in the past 20 years have different manufacturers, different configuration structures (configured in industrial computer or workstation mode), different specifications and models, different operating system settings (Windows 98 / 2000 Server / NT or Linux system), different recording and analysis software and functions, resulting in different data archiving and data re-analysis capabilities. The manufacturer's manual does not introduce how to export the fault recording data to an office computer for detailed analysis at the production site, and there is no explanation for the fault recording device that was put into operation more than 10 years ago. As a result, the company's electrical technicians can only view fault reports and fault waveforms online on the fault recording device at the production site. It is not convenient to conduct detailed fault recording analysis and clear screenshots of fault waveforms on site, and it is not possible to achieve long-term preservation of important fault data (the on-site fault recording device will automatically overwrite the fault recording data from one year ago according to the different recording data storage capacity configured by each manufacturer for the fault recording device). It is not possible to export and store important fault recording data for a long time, nor is it possible to use dedicated fault recording analysis software on an office computer to further conduct offline detailed analysis of fault recording data produced by different manufacturers, put into operation at different times, and using different operating systems. This makes it inconvenient to analyze in detail the development process of electrical faults and related electrical quantity changes, related electrical quantity change characteristics during some special electrical faults, protection action behavior characteristics, etc. It is also not convenient to take clear screenshots of waveforms and save important electrical quantity waveforms during electrical faults. Summary of the invention

[0004] The object of the present invention is to provide a method for exporting fault data of a power fault recorder and an off-line analysis method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A method for exporting fault data of a power fault recorder and an offline analysis method thereof, the method comprising: Prepare a clean and formatted USB drive; Select the fault recording data to be exported; Determine different export modes of fault recording data according to the configuration of the fault recording device; The exported fault data is analyzed to obtain fault result data.

[0006] As a further solution of the present invention: the USB drive interface should be USB2.0 or below, the storage capacity should not exceed 16GB, and the format should be FAT32.

[0007] As a further solution of the present invention: selecting the fault recording data to be exported includes: Get a preliminary understanding of the fault situation; Confirm the file of the fault message to be exported for further analysis.

[0008] As a further solution of the present invention: the fault message is a fault recording start message containing year, month, day, hour, minute and second as basic information.

[0009] As a further solution of the present invention: different ways of exporting fault recording data are determined according to the configuration of the fault recording device, including: The fault recording device includes Windows 98 / 2000 Server / NT operating system and Linux system.

[0010] As a further solution of the present invention: the different export modes of the fault recording data are determined according to the configuration of the fault recording device, including: Determine the type of fault recording device; If the fault recording device is Windows 98 / 2000 Server / NT operating system and is equipped with a fault recording device similar to an industrial computer with an independent USB interface; confirm the storage path and file name of the original fault recording report data of the microcomputer fault recording device, and then select the fault recording data to be exported; then import the required fault recording data into the prepared U disk; If the microcomputer fault recording device is a Linux system and is configured with a fault recording device similar to an industrial computer processor and with an independent USB interface, insert the U disk into the USB interface, obtain the USB interface driver serial number of the USB device successfully loaded, and the file path data after the USB is mounted, convert the fault recording message into the recording data of the preset format to the U disk, and then uninstall the USB; If the microcomputer fault recording device is a Linux system, if it is only a recording workstation and is not equipped with a processor structure similar to that of an industrial computer, and there is no extra independent USB interface, you should first log in with the user password to enter the recording monitoring and analysis program of the fault recording workstation, then unplug the USB keyboard and insert the prepared U disk in its place. After the recording communication workstation monitoring terminal detects and identifies the U disk, you can select the fault recording data to be exported and converted in the fault recording device, or copy the recording data that has been converted into a preset format and stored in a folder of the Linux system to the U disk.

[0011] As a further solution of the present invention: the recorded data includes the basic information of year, month, day, hour, minute and second in the format of YYYYMMDD_HHMMSS, and contains the suffixes of .cfg, .dat, .dmf and .hdr.

[0012] As a further solution of the present invention: analyzing the exported fault data to obtain fault result data, including: The exported fault data is analyzed using power fault recording and analysis software.

[0013] As a further solution of the present invention: the specific model of the power fault recording and analysis software is CAAP2008X or other special recording and analysis software.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention targets power system microcomputer fault recording devices of different brands produced by different manufacturers, put into operation at different periods, and even with different operating systems, and proposes a method for exporting, storing, archiving and further offline analyzing the important fault recording data in the power fault recording device installed at the production site, and analyzing the electrical fault data in detail in an office computer, analyzing the electrical fault development process and related electrical quantity changes, related electrical quantity change characteristics during some special electrical faults, protection action behavior characteristics, etc., so as to judge the nature of the fault and the conclusion of the correctness of the protection action, so as to improve the reliability and automation level of power grid operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a flow chart of the fault data export and off-line analysis method of the power fault recorder.

[0016] Figure 2 The present invention is a specific flow chart of the fault data export of the power fault recorder and its off-line analysis method.

[0017] Figure 3This is a screenshot of the fault recording waveform and related voltage phase analysis of a company's 30 MW waste heat steam generator set that was shut down due to a fault and the automatic switching of its plant power reserve in Example 1 of the present invention, using special fault recording analysis software in an office computer.

[0018] Figure 4 The waveform of the relevant fault recording and the voltage phase analysis of a 300 MW coal gangue generator set in Example 2 of the present invention when the plant power is quickly cut off during shutdown Figure 1 .

[0019] Figure 5 The waveform of the relevant fault recording and the voltage phase analysis of a 300 MW coal gangue generator set in Example 2 of the present invention when the plant power is quickly cut off during shutdown Figure 2 .

[0020] Figure 6 This is a screenshot of the fault recording waveform and phase analysis of related electrical quantities during the plant power quick cut-off action of a 100 MW gas-fired generator set in Example 3 of the present invention.

[0021] Figure 7 This is a screenshot of the waveform analysis of a 110kV substation in Example 4 of the present invention, in which a single-phase grounding fault developed into a three-phase short-circuit fault. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms of "a", "an" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0024] It should be understood that although the terms first, second, etc. may be used to describe various information in the embodiments of the present invention, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.

[0025] See also Figures 1 to 3 In an embodiment of the present invention, a flowchart of a method for exporting fault data of a power fault recorder and its offline analysis is provided in an embodiment of the present invention. The method includes: the following steps S10-S40.

[0026] S10. Prepare a clean and formatted USB drive.

[0027] Among them, the U disk drive interface should be USB2.0 and below, the storage capacity should not exceed 16 GB (the optimal recommendation is not more than 8GB), FAT32 format (not NTFS format), and the U disk should be a U disk from a brand manufacturer with a universal driver program so that the fault recording device can automatically identify and detect the U disk.

[0028] S20. Select the fault recording data to be exported.

[0029] S20: selecting the fault recording data to be exported, including: S201. Preliminarily understand the fault overview. Specifically, the fault overview is understood by online viewing of the fault messages and reports recorded in the order of fault time in the fault recording device at the production site.

[0030] S202: Confirm the file of the fault message to be exported and further analyzed.

[0031] The fault message is a fault recording start message containing year, month, day, hour, minute, and second (YYYYMMDD_HHMMSS) as basic information.

[0032] In some embodiments, the corresponding fault message is opened to view the corresponding fault waveform, identify the corresponding electrical analog quantity (voltage, current) waveform changes and switch quantity changes and fault time corresponding to the fault, and confirm the file of the fault message that needs to be exported and further analyzed.

[0033] S30. Determine different exporting methods of the fault recording data according to the configuration of the fault recording device.

[0034] The step S30, determining different ways of exporting the fault recording data according to the configuration of the fault recording device, includes: Determine the type of fault recording device; If the fault recording device is Windows 98 / 2000 Server / NT operating system and is equipped with a fault recording device similar to an industrial computer with an independent USB interface; confirm the storage path and file name of the original fault recording report data of the microcomputer fault recording device, and then select the fault recording data message to be exported; then import the required fault recording report into the prepared U disk.

[0035] Specifically, when the microcomputer fault recording device is a Windows 98 / 2000 Server / NT operating system and is configured with a fault recording device similar to an industrial computer with an independent USB interface: first confirm the storage path and file name of the original fault recording report data of the recording data of the microcomputer fault recording device, then select the fault recording data message to be exported, click the left mouse button to confirm and enter the waveform viewing and analysis screen, press the right mouse button to select the "Export COMTRADE File" function or select the "Export COMTRADE" function in the "File" function drop-down menu in the recording analysis interface, then check and confirm the default export file storage path and export data file directory of the fault recording data message and remember them. Afterwards, insert the prepared U disk into the USB interface of the monitoring terminal. After the monitoring terminal detects and identifies the U disk, find the storage path of the previously exported file and the exported data file directory and open the export file directory. After successfully copying the fault recording report export file containing the basic information of the fault time year, month, day, hour, minute and second (YYYYMMDD_HHMMSS) and the file with the suffix ".cfg" and ".dat" in the folder directory to the U disk, uninstall and unplug the U disk. Finally, copy the recording file (the file with the suffix ".cfg" and ".dat") in the U disk to the folder of the fault recording of a certain station established and saved in the office computer for archiving. Use special fault recording analysis software (such as CAAP2008X or other recording analysis software) in the office computer to select and open the fault recording export file with the suffix ".cfg" to enter the feature-rich fault recording analysis interface. The dedicated fault recording analysis software in the office computer can open the fault recording data files that have been exported and converted into the "COMTRADE" data format by the fault recording devices put into operation by different manufacturers and at different times. The dedicated fault recording analysis software in the office computer is rich in functions and has all the analysis functions included in the on-site online recording analysis function of the fault recording device: convenient selection of display / hide functions of each recording electrical quantity channel, waveform zooming / stretching, recording start time and selection of each sampling point time, switch quantity change, instantaneous value / effective value / primary effective value / phase angle value of each waveform / display of the phase angle difference between each channel and the first channel, channel color, waveform background color, coordinate color, cursor color, as well as phasor analysis, harmonic analysis, power analysis and other functions. It can be convenient and free to analyze in detail the electrical quantity and switch quantity change process of the relevant channels before and after the fault and the protection action behavior after the fault recording device is started in the office computer, especially for some special faults. It can provide analysis basis for the setting of the fixed value of the relevant protection and automatic devices and promote the reliability of the protection device and the power grid operation. The specific usage of the detailed analysis will not be described in detail here.

[0036] If the microcomputer fault recording device is a Linux system and is configured with a fault recording device similar to an industrial computer processor and with an independent USB interface, insert the U disk into the USB interface, obtain the USB interface driver serial number of the USB device successfully loaded and the file path data after USB mounting, convert the fault recording message into a recording file in COMTRADE data format to the U disk, and then uninstall the USB.

[0037] Specifically, if the microcomputer fault recording device is a Linux system, and is equipped with a fault recording device similar to an industrial computer processor and with an independent USB interface, the method of exporting the selected fault recording data message at this time is different from the export method of the fault recording device for the Windows operating system. At this time, first insert the prepared U disk into the USB interface of the on-site fault recording control device, select the "USB Management" function interface in the "Other Functions" drop-down menu in the recording analysis interface, and click the "Mount USB" indicator button in this interface. If the USB is loaded successfully, the green indicator "USB Mount Successful" will be displayed (if the USB mount indicator is gray, it means that the USB has not been loaded successfully, the recording monitoring system has not found the U disk, and the U disk is not available at this time), and the USB interface driver serial number of the USB device successfully loaded and the file path directory after the USB is mounted will be prompted in the "USB Management" function interface, and the path and directory should be remembered. Then, in the "Query Recording Trigger Record" function interface of the recording monitoring interface, find and select the fault recording data message to be exported (the fault recording message containing the basic information of the year, month, day, hour, minute, second in the YYYYMMDD_HHMMSS format mentioned above), double-click the left mouse button to confirm and enter the waveform viewing and analysis screen, press the right mouse button to select the "Export COMTRADE File" function or select "Export COMTRADE File" in the "File" function drop-down menu in the recording analysis interface. "Function, search and select the folder directory where USB is loaded successfully in the directory of the fault recording device, so as to automatically save the recording file converted into COMTRADE data format in the U disk. The file also contains the basic information of the year, month, day, hour, minute, and second in the YYYYMMDD_HHMMSS format as mentioned above, and contains the fault recording message export data file with the suffixes of ".cfg", ".dat", ".dmf" and ".hdr". After exporting the relevant fault recording data message into the recording file in COMTRADE data format to the U disk in the same way, enter the recording monitoring and analysis interface and select "USB Management" in the "Other Functions" drop-down menu Function interface, click the "Uninstall USB" indicator button, if the USB is successfully uninstalled, the USB mount indicator will be gray, indicating that the USB has been uninstalled. At this time, the corresponding fault recording message data cannot be exported to the U disk and is stored in other file directories of the monitoring system and cannot be copied to the U disk. For some manufacturers whose fault recording devices are equipped with independent USB interfaces and similar industrial computer processors, the selected fault recording message can be converted into COMTRADE data format and the recording data stored in certain folders of the Linux system can be copied to the U disk. These fault recording data files exported to the U disk are copied to the office computer according to the above method for storage, archiving and further detailed analysis. It is consistent with the above method system and will not be described in detail here.

[0038] If the microcomputer fault recording device is a Linux system, if it is only a recording workstation and is not equipped with a processor structure similar to that of an industrial computer, and there is no extra independent USB interface, you should first log in with the user password to enter the recording monitoring and analysis program of the fault recording workstation, then unplug the USB keyboard and insert the prepared U disk in its place. After the recording communication workstation monitoring terminal detects and identifies the U disk, you can select the fault recording data to be exported and converted in the fault recording device, or copy the recording data that has been converted into COMTRADE data format and stored in a folder of the Linux system to the U disk.

[0039] Specifically, if the microcomputer fault recording device is a Linux system, and it is only a recording workstation without a fault recording device equipped with a processor structure similar to that of an industrial computer and without an extra independent USB interface, the method of exporting the selected fault recording data message is different from the method of exporting the fault data of the aforementioned fault recording device. The recording communication workstation only has a USB keyboard and USB mouse interface but no extra independent USB interface. At this time, you should first log in with the user password to enter the recording monitoring and analysis program of the fault recording workstation, then unplug the USB keyboard and insert the prepared U disk in its place. After the monitoring terminal of the recording communication workstation detects and identifies the U disk, the fault recording data to be exported and converted in the fault recording device can be selected, or the recording data that has been converted to COMTRADE data format and stored in a folder of the Linux system can be copied to the U disk. After checking that the fault recording data file to be exported has been successfully copied to the U disk, uninstall and unplug the U disk, and then restore the USB keyboard of the recording communication workstation to the USB interface. These fault recording data files exported to the USB flash drive are copied to the office computer according to the above method for storage, archiving and further detailed analysis.

[0040] S40: Analyze the exported fault data to obtain fault result data.

[0041] Specifically, a dedicated power fault recording and analysis software (CAAP2008X or other dedicated recording and analysis software) is used in an office computer to perform a detailed analysis of the exported fault data.

[0042] The present invention is aimed at power system microcomputer fault recording devices of different brands, put into operation at different times, and even with different operating systems produced by different manufacturers, and the recording analysis software and functions are different. Previously, there was no function to export and save important fault recording data from the on-site fault recording device, and to save and archive the fault recording data in the office computer and re-analyze the data. The study proposes a method for exporting the fault recording data of microcomputer fault recorders of different manufacturers, different configurations, and different operating systems (Windows or Linux) in the past 20 years, and realizing detailed analysis of offline fault data in the office computer. It can be convenient and free to analyze in detail in the office computer the process of changes in the electrical quantities and switch quantities of the relevant channels before and after the fault after the fault recording device is started, and the protection action behavior, especially for some special faults. Analysis of relevant electrical quantities can provide an analysis basis for the setting of the fixed values ​​of relevant protection and automatic devices, thereby providing a direct basis for judging the nature of the fault and the conclusion of the correctness of the protection action, meeting the relevant requirements of power grid dispatching and operation management, and effectively promoting the improvement of the reliability and automation level of protection devices and power grid operations.

[0043] Example 1 Figure 2 As shown in the figure, a microcomputer fault recording device of the DRL-600-UF workstation mode produced by a domestic manufacturer is configured for a 30 MW waste heat steam generator set. The system adopts the Linux operating system and was put into operation in early 2020. The recording workstation is not equipped with redundant USB interfaces. When exporting fault data, it is necessary to log in to the real-time recording monitoring system, unplug the USB drive port occupied by the USB keyboard, insert the USB disk, and then convert the selected fault recording message data into COMTRADE data format and copy it to the USB disk. After the copying is completed, insert the USB keyboard into the USB drive port. Use CAAP2008X recording analysis software on the office computer to open and analyze the exported and copied fault recording file with the ".cfg" suffix file. The system voltage, generator terminal voltage, plant bus voltage, standby power supply voltage change waveform and phase, and plant power self-starting current waveform change after the plant power is restored during the late stage of the unit's fault shutdown are analyzed in detail. The screenshot of the waveform of the whole process is shown in Figure 2 shown.

[0044] Example 2 Figure 3As shown in the figure, a microcomputer fault recording device (with an industrial computer) of a domestic manufacturer, LBD-MGR-8000 type microcomputer generator transformer group, configured for a 300 MW coal gangue generator set, is used. The system uses the Windows operating system and was put into operation in 2016. The fault recording data of the system is exported and automatically stored in D: / 8000 / comtrade / . The recording data file under the document path, which has been converted to the "comtrade" format and contains the year, month, day, hour, minute, and second fault recording time information with the suffixes ".cfg" and ".dat", can be copied to a U disk. The recording analysis software can be used in an office computer to analyze the electrical quantity waveform, change process, fast-cut action time, and related fault recording waveform and voltage phase analysis when the 300 MW unit is shut down due to a fault, and the analysis screenshot is shown in detail. Figure 3 shown.

[0045] Example 3 Figure 4 As shown, a YS-900A-G fault recording and distance measuring device (with its own industrial computer and independent USB flash drive interface) produced by a domestic manufacturer and configured for a 100 MW gas-fired generator set is used. The system uses the Linux operating system and will be put into operation in 2022. By entering the online recording monitoring system to view the fault recording message and waveform, the selected fault report is converted into the "comtrade" format and stored in a certain directory of the system. After inserting and detecting the USB flash drive, the recording data file containing the fault recording time information of the year, month, day, hour, minute and second with the suffixes of ".cfg", ".dat", ".dmf" and ".hdr" that has been converted into the "comtrade" format in the recording system is copied to the USB flash drive. The recording analysis software is used on the office computer to analyze the electrical quantity waveform, change process, fast-cutting action time and related electrical quantity waveform and voltage phase analysis when the 100 MW gas-fired generator set's plant power is quickly cut when the load is low. The analysis screenshots are shown in detail. Figure 4 shown.

[0046] Example 4 Figure 5As shown in the figure, a DRL-600-G microcomputer fault recording device (with a processor similar to an industrial computer and an independent USB flash drive interface) produced by a domestic manufacturer and configured for a 110kV substation is used. The system uses the Linux operating system and will be put into operation in 2022. By entering the online recording monitoring system to view the fault recording message and waveform, log in to the real-time recording monitoring system, insert the USB flash drive file path and directory into the USB port of the recording device, convert the selected fault report into the "comtrade" format and store it in the USB loading document path directory, and automatically load the recording data file of the fault recording time information with the suffixes of ".cfg", ".dat", ".dmf" and ".hdr" that has been converted to the "comtrade" format in the recording system to the USB flash drive (the document cannot be copied to the USB flash drive). The screenshot of the whole process of recording and analyzing the single-phase grounding and three-phase short circuit fault of the 10kV distribution output of the 110kV substation using the recording and analysis software on the office computer is shown in the screenshot of the analysis. Figure 5 shown.

[0047] It should be understood that, although each step in the flow chart of each embodiment of the present invention is shown in sequence according to the indication of the arrow, these steps are not necessarily performed in sequence according to the order indicated by the arrow. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be performed in other orders. Moreover, at least a portion of the steps in each embodiment may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and the execution order of these sub-steps or stages is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for deriving fault data of a power fault recorder and its off-line analysis, characterized in that: The method includes: Prepare a formatted USB drive; Select the fault recording data to be exported; Determine different export modes of fault recording data according to the configuration of the fault recording device; The exported fault data is analyzed to obtain fault result data.

2. The method for deriving fault data of a power fault recorder and its off-line analysis according to claim 1 is characterized in that: The USB drive interface should be USB2.0 or below, the storage capacity should not exceed 16 GB, and the format should be FAT32.

3. The method for deriving fault data of a power fault recorder and analyzing it offline according to claim 1, characterized in that: Select the fault recording data to be exported, including: Get a preliminary understanding of the fault situation; Confirm the file of the fault message to be exported for further analysis.

4. The method for deriving fault data of a power fault recorder and analyzing it offline according to claim 3, characterized in that: The fault message is a fault recording start message containing year, month, day, hour, minute and second as basic information.

5. The method for deriving fault data of a power fault recorder and analyzing it offline according to claim 1, characterized in that: Different ways of exporting fault recording data are determined according to the configuration of the fault recording device, including: The fault recording device includes Windows 98 / 2000 Server / NT operating system and Linux system.

6. The method for deriving fault data of a power fault recorder and analyzing it offline according to claim 1, characterized in that: Determining different ways of exporting fault recording data according to the configuration of the fault recording device includes: Determine the type of fault recording device; If the fault recording device is Windows 98 / 2000 Server / NT operating system and is equipped with a fault recording device similar to an industrial computer with an independent USB interface; confirm the storage path and file name of the original fault recording report data of the microcomputer fault recording device, and then select the fault recording data to be exported; then import the required fault recording data into the prepared U disk; If the microcomputer fault recording device is a Linux system and is configured with a fault recording device similar to an industrial computer processor and with an independent USB interface, insert the U disk into the USB interface, obtain the USB interface driver serial number of the USB device successfully loaded, and the file path data after the USB is mounted, convert the fault recording message into the recording data of the preset format to the U disk, and then uninstall the USB; If the microcomputer fault recording device is a Linux system, if it is only a recording workstation and is not equipped with a processor structure similar to that of an industrial computer, and there is no extra independent USB interface, you should first log in with the user password to enter the recording monitoring and analysis program of the fault recording workstation, then unplug the USB keyboard and insert the prepared U disk in its place. After the recording communication workstation monitoring terminal detects and identifies the U disk, you can select the fault recording data to be exported and converted in the fault recording device, or copy the recording data that has been converted into a preset format and stored in a folder of the Linux system to the U disk.

7. The method for deriving fault data of a power fault recorder and analyzing it offline according to claim 6, characterized in that: The data format of the recorded data is COMTRADE.

8. The method for deriving fault data of a power fault recorder and analyzing it offline according to claim 6, characterized in that: The recorded data includes the year, month, day, hour, minute and second in the YYYYMMDD_HHMMSS format as basic information, and has the suffixes of .cfg, .dat, .dmf and .hdr.

9. The method for deriving fault data of a power fault recorder and analyzing it offline according to claim 1, characterized in that: Analyze the exported fault data to obtain fault result data, including: The exported fault data is analyzed using power fault recording and analysis software.

10. The method for deriving fault data of a power fault recorder and analyzing it offline according to claim 9, characterized in that: The specific model of the power fault recording and analysis software is CAAP2008X recording and analysis software.

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