Fault determination method and system for mining flame-proof and intrinsically safe combined frequency converter

Abstract

The invention relates to the technical field of frequency converter fault diagnosis, in particular to a fault determination method and system for a mining flameproof and intrinsically safe combined frequency converter. The method comprises the following steps: acquiring historical current data and current current data, performing data visualization processing on the historical current data and the current current data to obtain a fault current fluctuation diagram and an operation current fluctuation diagram, performing peak value calculation analysis on the fault current fluctuation diagram to obtain a fault peak value standard, and calculating the operation current fluctuation diagram according to the fault peak value standard. Determining peak value change information based on the operation current fluctuation diagram, determining whether a fault precursor exists in the current current data according to the peak value change information and a fault peak value standard, and if yes, determining a precursor fault type corresponding to the peak value change information in the fault peak value standard, and frequency converter maintenance information is determined according to the precursor fault type and a preset maintenance standard. The operation stability and reliability of the frequency converter can be improved.

Description

Technical Field

[0001] This application relates to the technical field of frequency converter fault diagnosis, and particularly to a method and system for determining faults of a combined mining flameproof and intrinsically safe frequency converter. Background Art

[0002] Variable frequency drive is applied in various industrial and mining operations such as coal mine scraper conveyors, belt conveyors, winches, vertical shaft hoists, shearer electric haulage, fans, and water pumps. The variable frequency drive device can be used for both constant torque loads such as scraper conveyors, belt conveyors, winches, and vertical shaft hoists, and constant power loads such as mine fans and water pumps in coal mines.

[0003] The mining flameproof and intrinsically safe frequency converter is a frequency converter specially applied to the mine environment. To ensure the safe and reliable operation of the frequency converter in the dangerous mine environment, the current data of the frequency converter is usually analyzed to monitor the operation of the frequency converter, and an alarm is given when the current is abnormal, ensuring the safe operation of the frequency converter and other electrical equipment in the mine environment.

[0004] Currently, the fault alarm of the frequency converter uses a fast detection circuit. The states of some key points in the frequency converter are sent to the microprocessor, and after being processed by an algorithm, a judgment of whether there is a fault is made, and then a corresponding alarm signal is given. Although this method can detect the current abnormal fault of the frequency converter, it only gives an alarm signal after the frequency converter fails, and it is impossible to perform preventive maintenance on the frequency converter before the fault occurs, which not only causes damage to the hardware of the frequency converter itself, but also reduces the operation stability and reliability of the frequency converter. Summary of the Invention

[0005] In order to accurately adjust the relative posture of the processing tool and the plate where the fastener hole structure is located, this application provides a method and system for determining faults of a combined mining flameproof and intrinsically safe frequency converter.

[0006] In a first aspect, this application provides a method for determining faults of a combined mining flameproof and intrinsically safe frequency converter, adopting the following technical solution: A method for determining faults of a combined mining flameproof and intrinsically safe frequency converter includes: Obtain historical current data and current current data, where the historical current data is the current change data corresponding to different fault types of the frequency converter within a historical period, and the current current data is the current change data corresponding to the current preset time period of the frequency converter; Perform data visualization processing on the historical current data and the current current data to obtain a fault current fluctuation diagram corresponding to each fault type and an operating current fluctuation diagram corresponding to the current operation of the frequency converter; Perform peak calculation and analysis on the fault current fluctuation diagram to obtain the fault peak standard; Based on the operation current fluctuation diagram, determine the peak change information, and determine whether there is a fault precursor in the current current data according to the peak change information and the fault peak standard. If so, determine the precursor fault type corresponding to the peak change information in the fault peak standard, and determine the frequency converter maintenance information according to the precursor fault type and the preset maintenance standard.

[0007] In a preferred example, the present application can be further configured as: performing data visualization processing on the historical current data and the current current data to obtain a fault current fluctuation diagram corresponding to each fault type and an operation current fluctuation diagram corresponding to the current operation of the frequency converter, including: Create an abnormal waveform coordinate and a current waveform coordinate. The X-axis coordinate of the abnormal waveform coordinate is the historical time node of the operation of the frequency converter within the historical period, and the X-axis of the current waveform coordinate is the real-time time node of the current operation of the frequency converter. The Y-axis of the abnormal waveform coordinate and the current waveform coordinate is the current change value corresponding to the current data; Map the historical current data to the abnormal waveform coordinate according to the corresponding data generation time node to obtain a fault current waveform diagram corresponding to each fault type; Map the current waveform coordinate to the current waveform coordinate according to the corresponding data generation time node to obtain an operation current waveform diagram corresponding to the current operation of the frequency converter.

[0008] In a preferred example, the present application can be further configured as: performing peak calculation and analysis on the fault current fluctuation diagram to obtain the fault peak standard, including: Divide the fault fluctuation curves of different fault types in the fault current fluctuation diagram according to a preset wave distance to obtain a set of fluctuation curves corresponding to each fault type; Collect the maximum peak value, the minimum peak value, and the peak period time period corresponding to the highest peak value and the lowest peak value of each fluctuation curve in the set of fluctuation curves, calculate the average value of the maximum peak value and the minimum peak value, and use the calculated fluctuation average value as the numerator and the peak period time period as the denominator to obtain the curve representative value of each fluctuation curve in the set of fluctuation curves; Sort the curve representative values in each set of fluctuation curves according to their magnitudes to obtain a peak curve sequence; Bind the peak curve sequence to the fault type corresponding to the set of fluctuation curves to obtain the fault peak standard.

[0009] In a preferred example, the present application can be further configured as: the determining the peak change information based on the operation current fluctuation diagram includes: Perform waveform peak detection on the operating current fluctuation diagram to obtain multiple groups of peak data. The multiple groups of peak data include the highest peak data and the lowest peak data at different time nodes in the current fluctuation diagram; Calculate the mean values of the highest peak data and the lowest peak data in the multiple groups of peak data respectively, and use the calculated mean values of the peak data as the numerator, and use the time interval data corresponding to the highest peak data and the lowest peak data in the multiple groups of peak data as the denominator to obtain the representative value of the operation curve corresponding to the multiple groups of peak data; Arrange the representative values of the operation curve in chronological order to obtain the peak change information corresponding to the operating current fluctuation diagram.

[0010] In a preferred example of the present application, it can be further configured that: determining whether there is a fault precursor in the current current data according to the peak change information and the fault peak standard includes: Perform periodic analysis on the peak change information to obtain the change trend of the representative value of the operation curve; Match the change trend of the representative value of the operation curve with the peak changes of the peak curve sequences corresponding to different fault types in the fault peak standard respectively to determine whether there is a fault precursor in the current current data.

[0011] In a preferred example of the present application, it can be further configured that: before performing data visualization processing on the historical current data and the current current data, it further includes: Judge whether there are the same current data nodes in the current current data and the historical current data. If so, generate abnormal information.

[0012] In a preferred example of the present application, it can be further configured that: after determining the frequency converter maintenance information according to the precursor fault type and the preset maintenance standard, it further includes: Send the frequency converter maintenance information to the target terminal, and the target terminal is the terminal used by maintenance personnel; Determine whether there is still a fault precursor in the current current data within a preset time. If so, generate a shutdown instruction to control the frequency converter to stop operating.

[0013] In a second aspect, the present application provides a fault determination system for a mining flameproof and intrinsically safe combined frequency converter, adopting the following technical solution: A fault determination system for a mining flameproof and intrinsically safe combined frequency converter includes, A data acquisition module, configured to acquire historical current data and current current data, where the historical current data is the current change data corresponding to different fault types of the frequency converter during a historical period, and the current current data is the current change data corresponding to the current preset time period of the frequency converter; A data processing module, configured to perform data visualization processing on the historical current data and the current current data to obtain a fault current fluctuation graph corresponding to each fault type and an operating current fluctuation graph corresponding to the current operation of the frequency converter; A calculation and analysis module, configured to perform peak calculation and analysis on the fault current fluctuation graph to obtain a fault peak standard; A maintenance determination module, configured to determine peak change information based on the operating current fluctuation graph, and determine whether there is a fault precursor in the current current data according to the peak change information and the fault peak standard. If so, determine the precursor fault type corresponding to the peak change information in the fault peak standard, and determine frequency converter maintenance information according to the precursor fault type and a preset maintenance standard.

[0014] In a possible implementation manner, when the data processing module performs data visualization processing on the historical current data and the current current data to obtain a fault current fluctuation graph corresponding to each fault type and an operating current fluctuation graph corresponding to the current operation of the frequency converter, it specifically is used for: Create an abnormal waveform coordinate and a current waveform coordinate. The X-axis coordinate of the abnormal waveform coordinate is the historical time node of the operation of the frequency converter during a historical period, the X-axis of the current waveform coordinate is the real-time time node of the current operation of the frequency converter, and the Y-axis of the abnormal waveform coordinate and the current waveform coordinate is the current change value corresponding to the current data; Map the historical current data to the abnormal waveform coordinate according to the corresponding data generation time node to obtain a fault current waveform graph corresponding to each fault type; Map the current waveform coordinate to the current waveform coordinate according to the corresponding data generation time node to obtain an operating current waveform graph corresponding to the current operation of the frequency converter.

[0015] In another possible implementation manner, when the calculation and analysis module performs peak calculation and analysis on the fault current fluctuation graph to obtain a fault peak standard, it specifically is used for: Divide the fault fluctuation curves of different fault types in the fault current fluctuation graph according to a preset wave distance to obtain a set of fluctuation curves corresponding to each fault type; Collect the maximum peak value, the minimum peak value, and the peak period time segment corresponding to the highest peak value and the lowest peak value of each fluctuation curve in the set of fluctuation curves, calculate the average value of the maximum peak value and the minimum peak value, use the calculated fluctuation average value as the numerator, and use the peak period time segment as the denominator to obtain the curve representative value of each fluctuation curve in the set of fluctuation curves; Sort the curve representative values in each set of fluctuation curves according to their magnitudes to obtain a peak curve sequence; Bind the peak curve sequence to the corresponding fault types in the set of fluctuation curves to obtain a fault peak standard.

[0016] In another possible implementation manner, when determining the peak change information based on the operating current fluctuation diagram, the maintenance determination module is specifically configured to: Perform waveform peak detection on the operating current fluctuation diagram to obtain multiple sets of peak data, where the multiple sets of peak data include the highest peak data and the lowest peak data at different time nodes in the current fluctuation diagram; Calculate the average value of the highest peak data and the lowest peak data in the multiple sets of peak data respectively, use the calculated average value of the peak data as the numerator, and use the time interval data corresponding to the highest peak data and the lowest peak data in the multiple sets of peak data as the denominator to obtain the operating curve representative value corresponding to the multiple sets of peak data; Arrange the operating curve representative values in chronological order to obtain the peak change information corresponding to the operating current fluctuation diagram.

[0017] In another possible implementation manner, when determining whether there is a fault precursor in the current current data according to the peak change information and the fault peak standard, the maintenance determination module is specifically configured to: Perform periodic analysis on the peak change information to obtain the change trend of the operating curve representative value; Match the change trend of the operating curve representative value with the peak changes of the peak curve sequences corresponding to different fault types in the fault peak standard respectively to determine whether there is a fault precursor in the current current data.

[0018] In another possible implementation manner, the system further includes: an abnormality judgment module, where, The abnormality judgment module is configured to judge whether there are the same current data nodes between the current current data and the historical current data. If so, generate abnormality information.

[0019] In another possible implementation manner, the system further includes: an information sending module and an instruction generation module, where, The information sending module is used to send the inverter maintenance information to a target terminal, where the target terminal is a terminal used by a maintenance person; The instruction generation module is used to determine whether the current current data still has a fault precursor within a preset time, and if so, generate a shutdown instruction to control the inverter to stop operating.

[0020] In a third aspect, the present application provides an electronic device, which adopts the following technical solution: at least one processor; Memory; At least one application, wherein at least one application is stored in a memory and configured to be executed by at least one processor, and the at least one application is configured to: execute the above-mentioned fault determination method for a mining explosion-proof and intrinsically safe combined inverter.

[0021] In a fourth aspect, the present application provides a computer-readable storage medium, which adopts the following technical solution: A computer-readable storage medium stores a computer program, which, when executed in a computer, causes the computer to execute the above-mentioned method for determining a fault of a mine-used explosion-proof and intrinsically safe combined frequency converter.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: When performing fault detection on the operation process of the inverter, in order to avoid the occurrence of internal losses caused by a fault in the inverter, the present application adopts a fault determination method for a mining explosion-proof and intrinsically safe combined inverter, which specifically includes obtaining historical current data and current current data, the historical current data being the current change data corresponding to different fault types of the inverter within a historical period, and the current current data being the current change data corresponding to the current preset time period of the inverter, performing data visualization processing on the historical current data and the current current data, obtaining a fault current fluctuation diagram corresponding to each fault type and an operating current fluctuation diagram corresponding to the current inverter operation, and determining the fault current. The peak value calculation and analysis is performed on the current fluctuation diagram to obtain the fault peak standard, the peak value change information is determined based on the operating current fluctuation diagram, and whether the current current data has a fault precursor according to the peak value change information and the fault peak standard. If so, the precursor fault type corresponding to the peak value change information in the fault peak standard is determined, and the inverter maintenance information is determined according to the precursor fault type and the preset maintenance standard, so that the existing fault hidden dangers can be pre-diagnosed before the inverter fails. The maintenance personnel perform fault maintenance on the inverter as soon as possible according to the inverter maintenance information, which not only reduces the inverter's own loss caused by the fault, but also improves the operating stability and reliability of the inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic flowchart of a method for determining faults of a mine flameproof and intrinsically safe combined frequency converter provided by an embodiment of the present application; Figure 2 It is a schematic structural diagram of a fault determination system of a mine flameproof and intrinsically safe combined frequency converter provided by an embodiment of the present application; Figure 3 It is a schematic structural diagram of an electronic device provided by an embodiment of the present application. Detailed implementation manners

[0024] The following will further describe the present application in detail with reference to the appended Figure 1 to the appended Figure 3 drawings.

[0025] This specific embodiment is only an interpretation of the present application, and it is not a limitation of the present application. After reading this specification, those skilled in the art can make modifications without creative contributions to this embodiment as needed, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts fall within the scope of protection of the present application.

[0027] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after unless otherwise specified.

[0028] The following will further describe the embodiments of the present application in detail with reference to the drawings of the specification.

[0029] An embodiment of the present application provides a method for determining faults of a mine explosion-proof and intrinsically safe combined frequency converter, which is executed by an electronic device. The electronic device can be a server or a terminal device. Among them, the server can be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. The terminal device can be a smart phone, a tablet computer, a notebook computer, a desktop computer, etc., but is not limited thereto. The terminal device and the server can be directly or indirectly connected through wired or wireless communication methods, and the embodiments of the present application do not limit this. For example, Figure 1 as shown, the method includes: Step S10: Obtain historical current data and current current data.

[0030] Among them, the historical current data is the current change data corresponding to different fault types of the frequency converter within a historical period, and the current current data is the current change data corresponding to the current preset time period of the frequency converter.

[0031] Specifically, the historical period is used to specify the time range for obtaining historical current data. In the embodiment of the present application, the historical period is set to three years, and it can be specifically adjusted according to the actual situation.

[0032] Determine the historical period to be analyzed, and extract the current change data of the frequency converter under different fault types from this period. These data are usually stored in a database or a data warehouse and need to be obtained through a query operation. At the same time, it is also necessary to collect the current change data of the frequency converter in real time within the current preset time period to ensure the timeliness and accuracy of the data.

[0033] Step S11: Perform data visualization processing on the historical current data and the current current data to obtain a fault current fluctuation graph corresponding to each fault type and an operating current fluctuation graph corresponding to the current operation of the frequency converter.

[0034] Specifically, create an abnormal waveform coordinate and a current waveform coordinate. The X-axis coordinate of the abnormal waveform coordinate is the historical time node when the frequency converter operates within the historical period, and the X-axis of the current waveform coordinate is the real-time time node when the current frequency converter operates. The Y-axis of the abnormal waveform coordinate and the current waveform coordinate is the current change value corresponding to the current data. Then map the historical current data to the abnormal waveform coordinate according to the data generation time node to obtain a fault current waveform graph corresponding to each fault type, and then map the current waveform coordinate to the current waveform coordinate according to the data generation time node to obtain an operating current waveform graph corresponding to the current operation of the frequency converter.

[0035] Step S12: Perform peak calculation and analysis on the fault current fluctuation graph to obtain a fault peak standard.

[0036] Specifically, the fault fluctuation curves of different fault types in the fault current fluctuation diagram are segmented according to the preset wave distance to obtain the set of fluctuation curves corresponding to each fault type. Then, the maximum peak value, minimum peak value, and the peak period time segment corresponding to the maximum peak value and the minimum peak value of each fluctuation curve in the set of fluctuation curves are collected. The average values of the maximum peak value and the minimum peak value are calculated, and the calculated fluctuation average value is used as the numerator, and the peak period time segment is used as the denominator to obtain the curve representative value of each fluctuation curve in the set of fluctuation curves. Then, the curve representative values in each set of fluctuation curves are sorted according to their magnitudes to obtain the peak curve sequence. Then, the peak curve sequence is bound to the fault type corresponding to the set of fluctuation curves to obtain the fault peak standard.

[0037] Step S13: Determine the peak change information based on the operating current fluctuation diagram, and determine whether there is a fault precursor in the current current data according to the peak change information and the fault peak standard. If so, determine the precursor fault type corresponding to the peak change information in the fault peak standard, and determine the frequency converter maintenance information according to the precursor fault type and the preset maintenance standard.

[0038] Specifically, waveform peak detection is performed on the operating current fluctuation diagram to obtain multiple sets of peak data. The multiple sets of peak data include the maximum peak data and the minimum peak data at different time nodes in the current fluctuation diagram. Then, the average values of the maximum peak data and the minimum peak data in the multiple sets of peak data are calculated respectively, and the calculated peak data average value is used as the numerator, and the time interval data corresponding to the maximum peak data and the minimum peak data in the multiple sets of peak data is used as the denominator to obtain the operating curve representative value corresponding to the multiple sets of peak data. Then, the operating curve representative values are arranged in chronological order to obtain the peak change information corresponding to the operating current fluctuation diagram.

[0039] Specifically, periodic analysis is performed on the peak change information to obtain the change trend of the operating curve representative value. The change trend of the operating curve representative value is respectively matched with the peak change of the peak curve sequence corresponding to different fault types in the fault peak standard to determine whether there is a fault precursor in the current current data.

[0040] In the embodiment of the present application, when detecting faults during the operation of the frequency converter, in order to avoid the occurrence of internal losses caused by the frequency converter after a fault occurs, the present application adopts a fault determination method for a combined mine explosion-proof and intrinsically safe frequency converter, which specifically includes obtaining historical current data and current current data. The historical current data is the current change data corresponding to different fault types of the frequency converter within a historical period, and the current current data is the current change data corresponding to the current preset time period of the frequency converter. Perform data visualization processing on the historical current data and the current current data to obtain a fault current fluctuation diagram corresponding to each fault type and an operating current fluctuation diagram corresponding to the current operation of the frequency converter. Perform peak calculation and analysis on the fault current fluctuation diagram to obtain a fault peak standard. Determine the peak change information based on the operating current fluctuation diagram, and determine whether there is a fault precursor in the current current data according to the peak change information and the fault peak standard. If so, determine the precursor fault type corresponding to the peak change information in the fault peak standard, and determine the frequency converter maintenance information according to the precursor fault type and the preset maintenance standard, so that potential fault hazards can be diagnosed in advance before the frequency converter fails. Maintenance personnel can perform fault maintenance on the frequency converter early according to the frequency converter maintenance information, which not only reduces the self-loss of the frequency converter caused by faults, but also improves the operation stability and reliability of the frequency converter.

[0041] In a possible implementation manner of the embodiment of the present application, after determining the frequency converter maintenance information according to the precursor fault type and the preset maintenance standard, it further includes: sending the frequency converter maintenance information to a target terminal, where the target terminal is a terminal used by maintenance personnel, and determining whether there is still a fault precursor in the current current data within a preset time. If there is still a fault precursor, generate a shutdown instruction to control the frequency converter to stop operating.

[0042] The above embodiment introduces a fault determination method for a combined mine explosion-proof and intrinsically safe frequency converter from the perspective of the method flow. The following embodiment introduces a fault determination system for a combined mine explosion-proof and intrinsically safe frequency converter from the perspective of virtual modules or virtual units. For details, see the following embodiment.

[0043] The embodiment of the present application provides a fault determination system 20 for a combined mine explosion-proof and intrinsically safe frequency converter, as Figure 2 shown, Figure 2 is a schematic structural diagram of a fault determination system for a combined mine explosion-proof and intrinsically safe frequency converter provided by the embodiment of the present application. The system 20 may specifically include: A data acquisition module 21, configured to acquire historical current data and current current data. The historical current data is the current change data corresponding to different fault types of the frequency converter within a historical period, and the current current data is the current change data corresponding to the current preset time period of the frequency converter; A data processing module 22, configured to perform data visualization processing on historical current data and current current data to obtain a fault current fluctuation graph corresponding to each fault type and an operating current fluctuation graph corresponding to the current operation of the frequency converter; A calculation and analysis module 23, configured to perform peak calculation and analysis on the fault current fluctuation graph to obtain a fault peak standard; A maintenance determination module 24, configured to determine peak change information based on the operating current fluctuation graph, and determine whether there is a fault precursor in the current current data according to the peak change information and the fault peak standard. If so, determine the precursor fault type corresponding to the peak change information in the fault peak standard, and determine the frequency converter maintenance information according to the precursor fault type and the preset maintenance standard.

[0044] In a possible implementation manner of the embodiment of the present application, when the data processing module 22 performs data visualization processing on the historical current data and the current current data to obtain a fault current fluctuation graph corresponding to each fault type and an operating current fluctuation graph corresponding to the current operation of the frequency converter, it is specifically configured to: Create an abnormal waveform coordinate and a current waveform coordinate. The X-axis coordinate of the abnormal waveform coordinate is the historical time node of the operation of the frequency converter within the historical period, the X-axis of the current waveform coordinate is the real-time time node of the current operation of the frequency converter, and the Y-axis of the abnormal waveform coordinate and the current waveform coordinate is the current change value corresponding to the current data; Map the historical current data to the abnormal waveform coordinate according to the corresponding data generation time node to obtain a fault current waveform graph corresponding to each fault type; Map the current waveform coordinate to the current waveform coordinate according to the corresponding data generation time node to obtain an operating current waveform graph corresponding to the current operation of the frequency converter.

[0045] In another possible implementation manner of the embodiment of the present application, when the calculation and analysis module 23 performs peak calculation and analysis on the fault current fluctuation graph to obtain a fault peak standard, it is specifically configured to: Divide the fault fluctuation curves of different fault types in the fault current fluctuation graph according to a preset wave distance to obtain a set of fluctuation curves corresponding to each fault type; Collect the maximum peak value, the minimum peak value, and the peak period time period corresponding to the maximum peak value and the minimum peak value of each fluctuation curve in the set of fluctuation curves, and perform mean calculation on the maximum peak value and the minimum peak value, and use the calculated fluctuation mean value as the numerator and the peak period time period as the denominator to obtain the curve representative value of each fluctuation curve in the set of fluctuation curves; Sort the curve representative values in each set of fluctuation curves according to the size to obtain a peak curve sequence; Bind the fault types corresponding to the peak curve sequence and the fluctuation curve set to obtain the fault peak standard.

[0046] Another possible implementation of the embodiment of the present application. When the maintenance determination module 24 determines the peak change information based on the operating current fluctuation diagram, it is specifically used for: Perform waveform peak detection on the operating current fluctuation diagram to obtain multiple groups of peak data. The multiple groups of peak data include the highest peak data and the lowest peak data at different time nodes in the current fluctuation diagram; Calculate the mean values of the highest peak data and the lowest peak data in the multiple groups of peak data respectively, and use the calculated peak data mean value as the numerator, and use the time interval data corresponding to the highest peak data and the lowest peak data in the multiple groups of peak data as the denominator to obtain the representative value of the operating curve corresponding to the multiple groups of peak data; Arrange the representative values of the operating curve in chronological order to obtain the peak change information corresponding to the operating current fluctuation diagram.

[0047] Another possible implementation of the embodiment of the present application. When the maintenance determination module 24 determines whether there is a fault precursor in the current current data according to the peak change information and the fault peak standard, it is specifically used for: Perform periodic analysis on the peak change information to obtain the change trend of the representative value of the operating curve; Match the change trend of the representative value of the operating curve with the peak changes of the peak curve sequences corresponding to different fault types in the fault peak standard respectively to determine whether there is a fault precursor in the current current data.

[0048] Another possible implementation of the embodiment of the present application. The system 20 further includes: an abnormality judgment module, wherein, The abnormality judgment module is used to judge whether there is the same current data node between the current current data and the historical current data. If so, generate abnormality information.

[0049] Another possible implementation of the embodiment of the present application. The system 20 further includes: an information sending module and an instruction generation module, wherein, The information sending module is used to send the frequency converter maintenance information to the target terminal, and the target terminal is the terminal used by the maintenance personnel; The instruction generation module is used to determine whether there is still a fault precursor in the current current data within a preset time. If so, generate a shutdown instruction to control the frequency converter to stop operating.

[0050] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working process of the fault determination system 20 of the above-described mine explosion-proof and intrinsically safe combined frequency converter can refer to the corresponding process in the foregoing method embodiments, and will not be elaborated herein.

[0051] An electronic device is provided in an embodiment of the present application, such as Figure 3 shown. Figure 3 It is a schematic structural diagram of an electronic device provided in an embodiment of the present application. Figure 3 The electronic device 300 shown includes: a processor 301 and a memory 303. Among them, the processor 301 and the memory 303 are connected, such as connected through a bus 302. Optionally, the electronic device 300 may further include a transceiver 304. It should be noted that in practical applications, the transceiver 304 is not limited to one, and the structure of the electronic device 300 does not constitute a limitation to the embodiments of the present application.

[0052] The processor 301 may be a CPU (Central Processing Unit, central processing unit), a general-purpose processor, a DSP (Digital Signal Processor, data signal processor), an ASIC (Application Specific Integrated Circuit, application-specific integrated circuit), an FPGA (Field Programmable Gate Array, field programmable gate array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in connection with the disclosure of the present application. The processor 301 may also be a combination that implements computing functions, such as a combination including one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0053] The bus 302 may include a path for transmitting information between the above components. The bus 302 may be a PCI (Peripheral Component Interconnect, peripheral component interconnect standard) bus or an EISA (Extended Industry Standard Architecture, extended industry standard architecture) bus, etc. The bus 302 may be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 3 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0054] The memory 303 can be a ROM (Read Only Memory), or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory), or other types of dynamic storage devices that can store information and instructions. It can also be an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory), or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0055] The memory 303 is used to store the application program code for executing the solution of this application, and is controlled by the processor 301 for execution. The processor 301 is used to execute the application program code stored in the memory 303 to implement the content shown in the foregoing method embodiments.

[0056] Among them, the electronic device includes but is not limited to: mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Tablet Computers), PMPs (Portable Multimedia Players), in-vehicle terminals (such as in-vehicle navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. It can also be a server, etc. Figure 3 The shown electronic device is only an example and should not impose any limitations on the functions and usage scope of the embodiments of this application.

[0057] The embodiments of this application provide a computer-readable storage medium, on which a computer program is stored. When it runs on a computer, it enables the computer to execute the corresponding content in the foregoing method embodiments.

[0058] It should be understood that although the steps in the flowchart of the accompanying drawings are shown in sequence according to the indication of the arrows, these steps do not necessarily need to be executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and they can be executed in other orders. Moreover, at least some of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages. These sub-steps or stages do not necessarily need to be executed at the same moment, but can be executed at different moments. Their execution order does not necessarily need to be sequential, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0059] The above are only some embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A method for determining a fault of a mine flameproof and intrinsically safe combined frequency converter, characterized in that: include: Acquire historical current data and current current data, wherein the historical current data is current change data corresponding to different fault types of the inverter within a historical period, and the current current data is current change data corresponding to a current preset time period of the inverter; Performing data visualization processing on the historical current data and the current current data to obtain a fault current fluctuation diagram corresponding to each fault type and an operation current fluctuation diagram corresponding to the current inverter operation; Performing peak value calculation and analysis on the fault current fluctuation diagram to obtain a fault peak value standard; Based on the operating current fluctuation diagram, the peak change information is determined, and according to the peak change information and the fault peak standard, it is determined whether the current current data has a fault precursor. If so, the precursor fault type corresponding to the peak change information in the fault peak standard is determined, and the inverter maintenance information is determined according to the precursor fault type and the preset maintenance standard.

2. The method for determining a fault of a mine flameproof and intrinsically safe combined frequency converter according to claim 1, characterized in that: The data visualization processing of the historical current data and the current current data to obtain a fault current fluctuation diagram corresponding to each fault type and an operation current fluctuation diagram corresponding to the current inverter operation includes: Create abnormal waveform coordinates and current waveform coordinates, the X-axis coordinates of the abnormal waveform coordinates are the historical time nodes of the inverter operation in the historical period, the X-axis coordinates of the current waveform coordinates are the real-time time nodes of the current inverter operation, and the Y-axes of the abnormal waveform coordinates and the current waveform coordinates are the current change values ​​corresponding to the current data; Mapping the historical current data to the abnormal waveform coordinates according to the data generation time node, to obtain a fault current waveform diagram corresponding to each fault type; The current waveform coordinates are mapped to the current waveform coordinates according to the data generation time node, so as to obtain the operation current waveform diagram corresponding to the current inverter operation.

3. The method for determining a fault of a mine flameproof and intrinsically safe combined frequency converter according to claim 2, characterized in that: The peak value calculation and analysis of the fault current fluctuation diagram is performed to obtain the fault peak value standard, including: According to the preset wave distance, the fault fluctuation curves of different fault types in the fault current fluctuation diagram are respectively divided to obtain a set of fluctuation curves corresponding to each fault type; The maximum peak value, the minimum peak value, and the peak period corresponding to the maximum peak value and the minimum peak value of each fluctuation curve in the fluctuation curve set are collected, and the maximum peak value and the minimum peak value are averaged, and the calculated fluctuation average value is used as the numerator and the peak period is used as the denominator to obtain the curve representative value of each fluctuation curve in the fluctuation curve set; Sort the curve representative values ​​in each fluctuation curve set by size to obtain a peak curve sequence; The peak curve sequence is bound to the fault type corresponding to the fluctuation curve set to obtain a fault peak standard.

4. The method for determining a fault of a mine flameproof and intrinsically safe combined frequency converter according to claim 3, characterized in that: The determining of peak value change information based on the operating current fluctuation diagram includes: Performing waveform peak detection on the operating current fluctuation graph to obtain multiple sets of peak data, wherein the multiple sets of peak data include the highest peak data and the lowest peak data at different time nodes in the current fluctuation graph; Calculate the average of the highest peak data and the lowest peak data in the multiple sets of peak data respectively, and use the calculated average of the peak data as the numerator, and use the time interval data corresponding to the highest peak data and the lowest peak data in the multiple sets of peak data as the denominator, to obtain the operating curve representative values ​​corresponding to the multiple sets of peak data; The representative values ​​of the operation curve are arranged in chronological order to obtain the peak value change information corresponding to the operation current fluctuation diagram.

5. The method for determining a fault of a mine flameproof and intrinsically safe combined frequency converter according to claim 4, characterized in that: The determining whether the current current data has a fault precursor according to the peak value change information and the fault peak value standard includes: Performing periodic analysis on the peak value change information to obtain a change trend of the representative value of the operation curve; The variation trend of the representative value of the operating curve is matched with the peak variation of the peak curve sequence corresponding to different fault types in the fault peak standard to determine whether the current current data has a fault precursor.

6. The method for determining a fault of a mine flameproof and intrinsically safe combined frequency converter according to claim 1, characterized in that: The data visualization processing of the historical current data and the current current data also includes: It is determined whether the current current data and the historical current data have the same current data node, and if so, abnormal information is generated.

7. The method for determining a fault of a mine flameproof and intrinsically safe combined frequency converter according to claim 1, characterized in that: The step of determining the inverter maintenance information according to the precursor fault type and the preset maintenance standard further includes: Sending the inverter maintenance information to a target terminal, where the target terminal is a terminal used by a maintenance person; Determine within a preset time whether the current current data still has a fault precursor, and if so, generate a shutdown command to control the inverter to stop operating.

8. A fault determination system for a mine-used explosion-proof and intrinsically safe combined inverter, characterized in that: include: A data acquisition module, used to acquire historical current data and current current data, wherein the historical current data is current change data corresponding to different fault types of the inverter within a historical period, and the current current data is current change data corresponding to a current preset time period of the inverter; A data processing module, used for performing data visualization processing on the historical current data and the current current data, to obtain a fault current fluctuation diagram corresponding to each fault type and an operation current fluctuation diagram corresponding to the current inverter operation; A calculation and analysis module, used for performing peak value calculation and analysis on the fault current fluctuation diagram to obtain a fault peak value standard; A maintenance determination module is used to determine the peak change information based on the operating current fluctuation diagram, and determine whether the current current data has a fault precursor based on the peak change information and the fault peak standard. If so, determine the precursor fault type corresponding to the peak change information in the fault peak standard, and determine the inverter maintenance information based on the precursor fault type and the preset maintenance standard.

9. An electronic device, characterized in that: It includes: One or more processors; Memory; One or more application programs, wherein the one or more application programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs are configured to: execute a fault determination method for a mine-use explosion-proof and intrinsically safe combination inverter according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, a fault determination method for a mine-used explosion-proof and intrinsically safe combined frequency converter as described in any one of claims 1 to 7 is implemented.

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