Frequency converter fault processing method and device, storage medium and electronic equipment

Abstract

The invention discloses a frequency converter fault processing method and device, a storage medium and electronic equipment, and relates to the technical field of frequency converters. The method comprises the following steps: receiving a fault signal of a frequency converter and a first opening state signal of a frequency conversion operation cabinet; based on the fault signal of the frequency converter and the first opening state signal of the frequency conversion operation cabinet, an opening instruction is sent to an outgoing line cabinet; and receiving a second opening state signal fed back by the outgoing line cabinet, and sending a closing instruction to the power frequency operation cabinet after waiting for a preset duration so as to control the power frequency operation cabinet to be closed and the motor to operate at power frequency. According to the invention, direct shutdown can be avoided when the frequency converter breaks down heavily, and switching to power frequency is disturbed, so that the production efficiency is improved, and the production safety is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of frequency converters, and in particular to a frequency converter fault processing method, device, storage medium and electronic equipment. Background Art

[0002] A variable frequency drive (VFD), also known as a variable frequency speed regulator, is an electrical device used to adjust the speed of an AC motor. It controls the speed of the motor by controlling the frequency of the input voltage, thereby achieving precise control and regulation of the motor. The frequency converter can be widely used in industrial production.

[0003] At present, when the inverter fails seriously, the inverter usually issues a command to open the inverter power supply cabinet, cut off the power input, and make the motor stop by coasting. However, this method will cause the entire unit to stop, thus affecting production efficiency and safety. Summary of the invention

[0004] In view of this, the present application provides a frequency converter fault handling method, device, storage medium and electronic device, which mainly enable the frequency converter to switch to the industrial frequency without disturbance instead of shutting down directly when a serious fault occurs, thereby improving production efficiency and ensuring production safety.

[0005] According to a first aspect of the present application, a method for handling a frequency converter fault is provided, the method comprising:

[0006] Receive the fault signal of the frequency converter and the first opening state signal of the frequency conversion operation cabinet;

[0007] Based on the fault signal of the frequency converter and the first opening state signal of the frequency conversion operation cabinet, sending an opening instruction to the outgoing cabinet;

[0008] Receive the second opening state signal fed back by the outgoing line cabinet, and send a closing command to the power frequency operation cabinet after waiting for a preset time to control the power frequency operation cabinet to close and the motor to operate at power frequency.

[0009] According to a second aspect of the present application, a frequency converter fault processing device is provided, the device comprising:

[0010] A receiving unit, used for receiving a fault signal of the frequency converter and a first opening state signal of the frequency conversion operation cabinet;

[0011] A sending unit, configured to send a tripping instruction to an outgoing line cabinet based on a fault signal of the frequency converter and a first tripping state signal of the frequency conversion operation cabinet;

[0012] The switching unit is used to receive the second opening state signal fed back by the outgoing line cabinet, and send a closing command to the power frequency operation cabinet after waiting for a preset time to control the power frequency operation cabinet to close and the motor to operate at power frequency.

[0013] According to a third aspect of the present application, a storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned inverter fault processing method is implemented.

[0014] According to a fourth aspect of the present application, an electronic device is provided, comprising a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, wherein the processor implements the above-mentioned inverter fault handling method when executing the program.

[0015] By means of the above technical scheme, the present application provides a method, device, storage medium and electronic device for handling inverter faults, which first receives the inverter fault signal and the first opening state signal of the variable frequency operation cabinet, and then sends an opening command to the outlet cabinet based on the inverter fault signal and the first opening state signal of the variable frequency operation cabinet, and finally receives the second opening state signal fed back by the outlet cabinet, and sends a closing command to the power frequency operation cabinet after waiting for a preset time, so as to control the closing of the power frequency operation cabinet and the power frequency operation of the motor. It can be seen from this that when the inverter fails, the present application can make the motor run at the power frequency by jointly operating the variable frequency operation cabinet, the outlet cabinet and the power frequency operation cabinet, that is, the present application can switch to the power frequency without disturbance without shutting down the inverter when the inverter fails seriously, thereby improving production efficiency and ensuring production safety.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 A schematic diagram of a process flow of a frequency converter fault processing method provided by an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram of the signal connection of the frequency converter provided in an embodiment of the present application is shown;

[0020] Figure 3 A schematic diagram showing the connection relationship between the frequency converter, the frequency conversion operation cabinet, the frequency converter outlet cabinet and the power frequency operation cabinet provided in an embodiment of the present application is shown;

[0021] Figure 4 A schematic diagram of the inverter startup process provided by an embodiment of the present application is shown;

[0022] Figure 5 A schematic diagram of a frequency converter stop process provided in an embodiment of the present application is shown;

[0023] Figure 6 A schematic structural diagram of a frequency converter fault processing device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0024] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0025] In the prior art, when a serious fault occurs in the frequency converter, the entire unit will be shut down, thus affecting production efficiency and safety.

[0026] In order to solve the above problems, an embodiment of the present invention provides a method for handling inverter faults, which is applied to a unit control system, such as Figure 1 As shown, the method includes:

[0027] Step 101: Receive a fault signal of a frequency converter and a first opening state signal of a frequency conversion operation cabinet.

[0028] Among them, the frequency conversion operation cabinet is used to receive the opening instruction sent by the frequency converter when the frequency converter fails; open the circuit based on the opening instruction sent by the frequency converter, and feed back the first opening state signal to the frequency converter.

[0029] The embodiment of the present invention is mainly applicable to the scenario of switching to industrial frequency without disturbance when the inverter fails seriously. The execution subject of the embodiment of the present invention is a unit control system, which can switch the motor to industrial frequency without disturbance when the inverter fails seriously.

[0030] The variable frequency drive system provided by the embodiment of the present invention is as follows Figure 2 As shown, it includes a unit control system (CCS), a frequency converter (VFD), a frequency converter cabinet (QF1), a frequency converter outlet cabinet (QF2), a power frequency cabinet (QF3) and a main motor operating column (LCP). The connection relationship between the frequency converter (VFD), the frequency converter cabinet (QF1), the frequency converter outlet cabinet (QF2) and the power frequency cabinet (QF3) is as follows: Figure 3As shown, the frequency conversion cabinet (QF1), the frequency converter (VFD) and the frequency converter outlet cabinet (QF2) are connected in series in sequence, and then connected in series with the industrial frequency cabinet (QF3), and the frequency converter outlet cabinet (QF2) is connected to the motor M. Figure 3 QF0 in the diagram is the owner's power cabinet, which is equivalent to the main power supply.

[0031] For the embodiment of the present invention, when a fault occurs in the frequency converter (VFD) during operation, the frequency converter will send a fault signal to the unit control system (CCS), and the fault signal can specifically be a frequency converter serious fault shutdown signal. At the same time, the frequency converter will send a trip command to the frequency conversion operation cabinet (QF1), and the frequency conversion operation cabinet (QF1) will trip after receiving the trip command sent by the frequency converter, and feed back a first trip state signal to the unit control system (CCS).

[0032] Step 102: Based on the fault signal of the frequency converter and the first opening state signal of the frequency conversion operation cabinet, a tripping instruction is sent to the outgoing cabinet.

[0033] According to the embodiment of the present invention, after receiving the serious fault shutdown signal fed back by the frequency converter (VFD) and the first tripping state signal fed back by the frequency converter operation cabinet (QF1), the unit control system (CCS) confirms that a serious fault has occurred in the frequency converter (VFD) and the frequency converter operation cabinet (QF1) has been tripped, and then automatically sends a tripping command to the frequency converter output cabinet (QF2) to control the output cabinet (QF2) to trip.

[0034] Step 103, receiving the second opening state signal fed back by the outgoing line cabinet, and sending a closing instruction to the power frequency operation cabinet after waiting for a preset time, so as to control the power frequency operation cabinet to close the switch and the motor to operate at power frequency.

[0035] Among them, the preset time length can be set according to actual business needs, and the embodiment of the present invention does not make specific limitations on this. For example, after waiting for 4 seconds, a closing command is sent to the power frequency operation cabinet (QF3).

[0036] For the embodiment of the present invention, the outlet cabinet (QF2) opens after receiving the opening instruction sent by the unit control system (CCS), and feeds back the second opening state signal to the unit control system (CCS). After receiving the second opening state signal fed back by the outlet cabinet (QF2), the unit control system (CCS) confirms that the outlet cabinet (QF2) has opened, and sends a closing instruction to the power frequency operation cabinet (QF3) after waiting for a preset time. The power frequency operation cabinet (QF3) closes after receiving the closing instruction from the unit control system (CCS). At this time, the motor runs at the power frequency and does not stop. The embodiment of the present invention can eliminate the residual magnetism in the motor M by sending a closing instruction to the power frequency operation cabinet after waiting for a preset time. Since there is no residual magnetism, the motor will not generate an induced voltage, and will not cause an impact on the power grid when connected to the grid.

[0037] An inverter fault processing method provided by an embodiment of the present invention first receives the inverter fault signal and the first opening state signal of the frequency conversion operation cabinet, then sends an opening command to the outgoing line cabinet based on the inverter fault signal and the first opening state signal of the frequency conversion operation cabinet, finally receives the second opening state signal fed back by the outgoing line cabinet, and sends a closing command to the power frequency operation cabinet after waiting for a preset time, so as to control the power frequency operation cabinet to close and the motor to operate at power frequency. It can be seen that when the inverter fails, the embodiment of the present invention can make the motor operate at power frequency by jointly operating the frequency conversion operation cabinet, the outgoing line cabinet and the power frequency operation cabinet, that is, the embodiment of the present invention can switch to power frequency without interference without shutting down the inverter when the inverter fails seriously, thereby improving production efficiency and ensuring production safety.

[0038] Furthermore, as a refinement and extension of the specific implementation of the above embodiment, this embodiment also provides a method for starting the inverter, such as Figure 4 As shown, the method includes:

[0039] Step 201: Send a closing command to the outgoing line cabinet.

[0040] For the embodiment of the present invention, when starting the frequency converter (VFD), the process and electrical preparations are first performed, and the frequency converter is cold prepared. Then the unit control system (CCS) sends a closing command to the outgoing line cabinet (QF2), and the outgoing line cabinet (QF2) closes the circuit after receiving the closing command, and feeds back a third closing state signal to the unit control system (CCS).

[0041] Step 202: Receive the third closing state signal fed back by the outgoing cabinet, and send a command to the inverter to close the variable frequency operation cabinet. The inverter is used to control the variable frequency operation cabinet to close, and return a hot standby permission operation signal to the inverter.

[0042] For the embodiment of the present invention, after the unit control system (CCS) receives the third closing status signal and confirms that the outgoing line cabinet (QF2) is closed, the unit control system (CCS) sends an instruction to close the frequency conversion operation cabinet to the inverter. After receiving the instruction to close the frequency conversion operation cabinet, the inverter controls the frequency conversion operation cabinet (QF1) to close and returns a hot standby permission operation signal to the unit control system (CCS).

[0043] Step 203: Receive the hot standby operation permission signal of the inverter, and send a start instruction to the inverter to start the inverter.

[0044] For the embodiment of the present invention, after receiving the hot standby permission operation signal of the inverter and the third closing state signal fed back by the outlet cabinet (QF2), the unit control system (CCS) sends an instruction to start the inverter to the inverter (VFD), and the inverter starts to start and run after receiving the start instruction. Specifically, the unit control system (CCS) can generate a start instruction for the inverter based on the preset speed of the inverter, and send the start instruction to the inverter (VFD) to control the inverter to run at the preset speed.

[0045] Step 204: Receive the operation signal fed back by the inverter.

[0046] According to the embodiment of the present invention, the frequency converter will feed back an operation signal to the unit control system (CCS) during operation, and at the same time, it will also feed back a speed signal and an output current signal to the unit control system (CCS).

[0047] In some embodiments, the start of the frequency converter (VFD) can be controlled not only by the unit control system (CCS), but also by the main motor operating column (LCP). Specifically, when starting the frequency converter (VFD), the process and electrical preparations are first performed, and the frequency converter is cold prepared. After that, the main motor operating column (LCP) sends a closing command to the outlet cabinet (QF2). After receiving the closing command, the outlet cabinet (QF2) closes the circuit and feeds back a third closing state signal to the main motor operating column (LCP). After the main motor operating column (LCP) receives the third closing state signal and confirms that the outlet cabinet (QF2) is closed, the main motor operating column (LCP) sends a command to close the frequency conversion operation cabinet to the frequency converter. After receiving the command to close the frequency conversion operation cabinet, the frequency converter controls the frequency conversion operation cabinet (QF1) to close the circuit and returns a hot standby permission operation signal of the frequency converter to the main motor operating column (LCP). Then, after receiving the hot standby permission operation signal of the inverter and the third closing state signal fed back by the outlet cabinet (QF2), the main motor operation column (LCP) sends a command to start the inverter to the inverter (VFD). After receiving the start command, the inverter starts to start running. Specifically, the main motor operation column (LCP) can generate a start command of the inverter based on the preset speed of the inverter, and send the start command to the inverter (VFD) to control the inverter to run at the preset speed.

[0048] Furthermore, the power frequency switching method described in the first embodiment can ensure that the unit does not stop and the production line does not stop when the inverter fails. However, there are some special cases where the entire unit needs to be shut down for processing. For example, when the compressor vibrates too much, in order to prevent the entire unit from being damaged, it needs to be shut down for processing. Based on this, the embodiment of the present invention also provides a method for stopping the inverter, such as Figure 5 As shown, the method includes:

[0049] Step 301: Send a stop instruction to the frequency converter to control the frequency converter to stop output.

[0050] For the embodiment of the present invention, when the frequency converter needs to stop working, the unit control system (CCS) will send a stop command to the frequency converter (VFD). After receiving the stop command from the unit control system (CCS), the frequency converter (VFD) will stop output, and the operating signal disappears at this time.

[0051] Step 302: Send an instruction to the frequency converter to open the frequency conversion cabinet.

[0052] Wherein, the frequency converter is used to control the opening of the frequency conversion operation cabinet and make the hot standby signal disappear at the same time.

[0053] For the embodiment of the present invention, after detecting that the operating signal of the frequency converter (VFD) disappears, the unit control system (CCS) will send a command to the frequency converter (VFD) to open the variable frequency operation cabinet. After receiving the command, the frequency converter (VFD) will control the variable frequency operation cabinet (QF1) to open. At this time, the hot standby signal of the frequency converter disappears.

[0054] Step 303: Send a trip command to the outgoing line cabinet to control the outgoing line cabinet to trip.

[0055] In the embodiment of the present invention, the unit control system (CCS) sends a trip command to the outlet cabinet (QF2), and the outlet cabinet (QF2) performs trip after receiving the trip command. After the outlet cabinet (QF2) is tripped, the entire shutdown process ends, and the inverter startup steps in the second embodiment need to be re-executed when the machine is restarted next time.

[0056] In some embodiments, the inverter (VFD) can be stopped not only by the unit control system (CCS), but also by the main motor operating column (LCP). Specifically, when the inverter needs to stop working, the main motor operating column (LCP) will send a stop command to the inverter (VFD). After receiving the stop command from the main motor operating column (LCP), the inverter (VFD) will stop output, and the operation signal disappears at this time. After detecting that the operation signal of the inverter (VFD) disappears, the unit control system (CCS) will send a switch-off frequency conversion cabinet instruction to the inverter (VFD). After receiving the instruction, the inverter (VFD) will control the frequency conversion operation cabinet (QF1) to switch off, and the inverter hot standby signal disappears at this time. Then the main motor operating column (LCP) sends a switch-off instruction to the outgoing cabinet (QF2), and the outgoing cabinet (QF2) switches off after receiving the switch-off instruction. After the outgoing line cabinet (QF2) is opened, the entire shutdown process ends. When restarting next time, the inverter startup steps in Example 2 need to be executed again.

[0057] A method for handling inverter faults provided by an embodiment of the present invention first receives the fault signal of the inverter and the first opening state signal of the frequency conversion operation cabinet, then sends an opening command to the outlet cabinet based on the fault signal of the inverter and the first opening state signal of the frequency conversion operation cabinet, finally receives the second opening state signal fed back by the outlet cabinet, and sends a closing command to the power frequency operation cabinet after waiting for a preset time, so as to control the closing of the power frequency operation cabinet and the power frequency operation of the motor. It can be seen that when a fault occurs in the inverter, the embodiment of the present invention can make the motor run at the power frequency by jointly operating the frequency conversion operation cabinet, the outlet cabinet and the power frequency operation cabinet, that is, the embodiment of the present invention can switch to the power frequency without interference without stopping the inverter when the inverter fails seriously, thereby improving production efficiency and ensuring production safety. In addition, the embodiment of the present invention can also effectively start the inverter, and in some special cases, the embodiment of the present invention can also stop the inverter from running to prevent damage to the unit.

[0058] Further, as Figure 1 , Figure 4 and Figure 5 The specific implementation of the method shown in the embodiment provides a frequency converter fault processing device, such as Figure 6 As shown, the device includes: a receiving unit 31, a sending unit 32 and a switching unit 33.

[0059] The receiving unit 31 may be used to receive a fault signal of the frequency converter and a first opening state signal of the frequency conversion operation cabinet.

[0060] The sending unit 32 may be configured to send a tripping instruction to the outgoing cabinet based on the fault signal of the frequency converter and the first tripping state signal of the frequency conversion operation cabinet.

[0061] The switching unit 33 can be used to receive the second opening state signal fed back by the outgoing line cabinet, and send a closing instruction to the power frequency operation cabinet after waiting for a preset time to control the power frequency operation cabinet to close and the motor to operate at power frequency.

[0062] In some embodiments, the variable frequency operation cabinet is used to receive a tripping instruction sent by the frequency converter when the frequency converter fails; perform tripping based on the tripping instruction sent by the frequency converter, and feed back the first tripping state signal to the frequency converter.

[0063] In some embodiments, the device further comprises: a starting unit.

[0064] The sending unit 32 may also be used to send a closing instruction to the outgoing line cabinet.

[0065] The receiving unit 31 can also be used to receive the third closing state signal fed back by the outgoing line cabinet, and send an instruction to the frequency converter to close the frequency conversion operation cabinet, wherein the frequency converter is used to control the closing of the frequency conversion operation cabinet and return a hot standby permission operation signal to the frequency converter.

[0066] The starting unit may be used to receive the hot standby operation permission signal of the frequency converter and send a starting instruction to the frequency converter to start the frequency converter.

[0067] The receiving unit 31 may also be used to receive an operation signal fed back by the frequency converter.

[0068] In some embodiments, the starting unit may be specifically configured to generate a starting instruction for the frequency converter based on a preset speed of the frequency converter, and send the starting instruction to the frequency converter to control the frequency converter to operate at the preset speed.

[0069] In some embodiments, the receiving unit 31 can also receive the speed signal and the output current signal fed back by the inverter.

[0070] In some embodiments, the apparatus further comprises: a ready unit.

[0071] The standby unit can be used to perform process and electrical standby, as well as inverter cold standby, respectively.

[0072] In some embodiments, the device further comprises: a stopping unit.

[0073] The stop unit can be used to send a stop instruction to the frequency converter to control the frequency converter to stop output.

[0074] The sending unit 32 may also be used to send an instruction to the frequency converter to open the variable frequency operation cabinet, wherein the frequency converter is used to control the variable frequency operation cabinet to open and simultaneously make the hot standby signal disappear.

[0075] The sending unit 32 may also be used to send a tripping instruction to the outgoing line cabinet to control the outgoing line cabinet to be opened.

[0076] It should be noted that for other corresponding descriptions of the functional units involved in the inverter fault processing device provided in the embodiment of the present invention, reference can be made to Figure 1 , Figure 4 and Figure 5 The corresponding description in will not be repeated here.

[0077] Based on the above Figure 1 , Figure 4 and Figure 5The method shown in the embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, the above-mentioned Figure 1 , Figure 4 and Figure 5 The inverter fault handling method shown in the figure. Among them, the computer program can be downloaded to the CCS program, the CCS program can be saved in the computer, and then downloaded to the PLC (Programmable Logic Controller) in the unit control system (CCS) for execution.

[0078] Based on this understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, USB flash drive, mobile hard disk, etc.), including a number of instructions for enabling an electronic device (which can be a personal computer, server, or network device, etc.) to execute the methods of various implementation scenarios of the present application.

[0079] Based on the above Figure 1 , Figure 4 and Figure 5 The method shown, and Figure 6 In order to achieve the above-mentioned purpose, the embodiment of the present application also provides an electronic device, which can be a personal computer, a tablet computer, a server, or other network equipment, etc. The device includes a storage medium and a processor; the storage medium is used to store a computer program; the processor is used to execute the computer program to achieve the above-mentioned Figure 1 , Figure 4 and Figure 5 The inverter fault processing method shown in the figure. The electronic device can be specifically a PLC in a unit control system (CCS).

[0080] Optionally, the above-mentioned physical device may also include a user interface, a network interface, a camera, a radio frequency (RF) circuit, a sensor, an audio circuit, a WI-FI module, etc. The user interface may include a display, an input unit such as a keyboard, etc., and the optional user interface may also include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (such as a WI-FI interface), etc.

[0081] Those skilled in the art will appreciate that the above-mentioned physical device structure provided in this embodiment does not constitute a limitation on the physical device, and may include more or fewer components, or a combination of certain components, or different arrangements of components.

[0082] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the above-mentioned physical device, and supports the operation of the information processing program and other software and / or programs. The network communication module is used to realize the communication between the components inside the storage medium, and the communication with other hardware and software in the information processing physical device.

[0083] Through the description of the above implementation methods, those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform, or can be implemented by hardware.

[0084] When the frequency converter fails, the embodiment of the present invention can make the motor run at the power frequency by jointly operating the frequency conversion operation cabinet, the outlet cabinet and the power frequency operation cabinet. That is, the embodiment of the present invention can switch to the power frequency without interference without stopping the machine when the frequency converter fails seriously, thereby improving production efficiency and ensuring production safety. In addition, the embodiment of the present invention can also effectively start the frequency converter. In some special cases, the embodiment of the present invention can also stop the frequency converter from running to prevent damage to the unit.

[0085] Those skilled in the art will appreciate that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present application. Those skilled in the art will appreciate that the modules in the devices in the implementation scenario can be distributed in the devices of the implementation scenario according to the description of the implementation scenario, or can be changed accordingly and located in one or more devices different from the present implementation scenario. The modules of the above-mentioned implementation scenario can be combined into one module, or can be further split into multiple submodules.

[0086] The above serial numbers of this application are only for description and do not represent the advantages and disadvantages of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of this application, but this application is not limited to them, and any changes that can be thought of by technicians in this field should fall within the scope of protection of this application.

Claims

1. A method for handling inverter faults, characterized in that: Applied to unit control systems, including: Receive the fault signal of the frequency converter and the first opening state signal of the frequency conversion operation cabinet; Based on the fault signal of the frequency converter and the first opening state signal of the frequency conversion operation cabinet, sending an opening instruction to the outgoing cabinet; Receive the second opening state signal fed back by the outgoing line cabinet, and send a closing command to the power frequency operation cabinet after waiting for a preset time to control the power frequency operation cabinet to close and the motor to operate at power frequency.

2. The method according to claim 1, characterized in that: The method further comprises: The variable frequency operation cabinet is used to receive a tripping instruction sent by the frequency converter when the frequency converter fails; perform tripping based on the tripping instruction sent by the frequency converter, and feed back the first tripping state signal to the frequency converter.

3. The method according to any one of claims 1 to 2, characterized in that: Before receiving the fault signal of the frequency converter and the first opening state signal of the frequency conversion operation cabinet, the method further includes: Sending a closing command to the outlet cabinet; receiving a third closing state signal fed back by the outlet cabinet, and sending an instruction to close the variable frequency operation cabinet to the frequency converter, wherein the frequency converter is used to control the closing of the variable frequency operation cabinet, and returns a hot standby permission operation signal to the frequency converter; receiving a hot standby operation permission signal from the frequency converter, and sending a start instruction to the frequency converter to start the frequency converter; Receive the operation signal fed back by the frequency converter.

4. The method according to claim 3, characterized in that The sending a start instruction to the frequency converter to start the frequency converter includes: Based on the preset speed of the frequency converter, a start instruction of the frequency converter is generated, and the start instruction is sent to the frequency converter to control the frequency converter to run at the preset speed.

5. The method according to claim 3, characterized in that: The method further comprises: Receive the speed signal and output current signal fed back by the frequency converter.

6. The method according to claim 3, characterized in that Before sending the closing instruction to the outlet cabinet, the method further includes: Carry out process and electrical preparation respectively, as well as inverter cold preparation.

7. The method according to claim 3, characterized in that After sending a start instruction to the frequency converter to start the frequency converter, the method further includes: Sending a stop command to the frequency converter to control the frequency converter to stop output; Sending an instruction to the frequency converter to open the variable frequency operation cabinet, wherein the frequency converter is used to control the variable frequency operation cabinet to open and simultaneously make the hot standby signal disappear; Send a trip command to the outgoing line cabinet to control the outgoing line cabinet to trip.

8. A frequency converter fault processing device, characterized in that: include: A receiving unit, used for receiving a fault signal of the frequency converter and a first opening state signal of the frequency conversion operation cabinet; A sending unit, configured to send a tripping instruction to an outgoing line cabinet based on a fault signal of the frequency converter and a first tripping state signal of the frequency conversion operation cabinet; The switching unit is used to receive the second opening state signal fed back by the outgoing line cabinet, and send a closing command to the power frequency operation cabinet after waiting for a preset time to control the power frequency operation cabinet to close and the motor to operate at power frequency.

9. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

10. An electronic device comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

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