Air duct blockage treatment method, power conversion equipment, program product and storage medium

Abstract

The invention discloses an air duct blockage processing method, power conversion equipment, a program product and a storage medium, and relates to the technical field of fault detection. According to the output power of the power conversion equipment and the temperature of at least one position in the power conversion equipment, air duct blockage information is output, real-time detection of air duct blockage of the power conversion equipment is achieved, and under the condition that the air duct blockage information represents air duct blockage, a fan in the power conversion equipment is controlled to rotate reversely to remove air duct foreign matter. Automatic treatment of air duct blockage is achieved, manual shutdown for air duct foreign matter removal is not needed, and the operation and maintenance labor cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fault detection, and in particular to a wind channel blockage processing method, a power conversion device, a program product and a storage medium. BACKGROUND

[0002] The power conversion device is generally installed outdoors, and the working environment is harsh. Dust, sand, willow catkins and other foreign matters are easily attached to the air inlet of the power conversion device, causing the wind channel to be blocked, and thus causing the power conversion device to abnormally dissipate heat.

[0003] Wind channel blockage is a common power conversion device fault. Currently, after the power conversion device fails, the maintenance personnel will only maintain it, and the wind channel blockage cannot be processed in a timely manner. SUMMARY

[0004] In view of the above problems, the present application provides a wind channel blockage processing method, a power conversion device, a program product and a storage medium, which realizes automatic processing of wind channel blockage, does not need to artificially stop the machine to remove foreign matters in the wind channel, and reduces the labor cost of operation and maintenance. The specific scheme is as follows:

[0005] The first aspect of the present application provides a wind channel blockage processing method, comprising:

[0006] obtaining the output power of the power conversion device and the sampling temperature of at least one position in the power conversion device;

[0007] outputting wind channel blockage information according to the output power of the power conversion device and the sampling temperature of at least one position in the power conversion device;

[0008] in the case that the wind channel blockage information represents wind channel blockage, controlling the fan in the power conversion device to reverse.

[0009] In a possible implementation, the control of the fan in the power conversion device to reverse includes:

[0010] according to a pre-set correspondence between the blockage level and the fan reverse parameter, outputting a target fan reverse parameter corresponding to the wind channel blockage level in the wind channel blockage information, the target fan reverse parameter including: the number of reversals and the reversal time;

[0011] controlling the fan to reverse according to the target fan reverse parameter.

[0012] In a possible implementation, the wind channel blockage processing method further includes:

[0013] in the case that the wind channel blockage information represents wind channel blockage, generating an alarm information and recording the wind channel blockage time.

[0014] In one possible implementation, the duct blockage handling method further includes:

[0015] After the fan reverses, the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device are obtained.

[0016] Based on the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device, the duct blockage information is output.

[0017] If the air duct blockage information indicates that the air duct is not blocked, delete the alarm information and reset the air duct blockage time to zero.

[0018] In one possible implementation, the duct blockage handling method further includes:

[0019] After the fan reverses, the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device are obtained.

[0020] Based on the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device, the duct blockage information is output.

[0021] If the duct blockage information indicates duct blockage, and the duct blockage time is less than a threshold, then the fan is controlled to reverse.

[0022] If the duct blockage time is not less than the threshold, the alarm information is sent to the target terminal device.

[0023] In one possible implementation, outputting duct blockage information based on the output power of the power conversion device and a sampled temperature at at least one location in the power conversion device includes:

[0024] Based on the pre-calibrated power-temperature curves of the power conversion device at various locations under unobstructed air duct conditions, output the temperature at each location corresponding to the output power of the power conversion device;

[0025] Calculate the temperature deviation between the sampling temperature at each location corresponding to the output power of the power conversion device and the temperature;

[0026] The air duct blockage information is output based on whether the temperature deviation value corresponding to each position in the power conversion device is greater than a threshold value. The threshold values ​​corresponding to each position in the power conversion device are not exactly the same.

[0027] In one possible implementation, the method for calibrating the power temperature profiles at various locations within the power conversion device includes:

[0028] Using a machine learning model, the linear relationship between temperature and output power at different locations of the power conversion device in the sample data is learned when the air duct is not blocked, and the power-temperature curves at each location of the power conversion device are obtained.

[0029] In one possible implementation, the sample data is obtained within a preset number of days from the current date, and the output power of the power conversion device in the sample data collected on the same day is greater than the product of the rated power and a preset ratio.

[0030] In one possible implementation, outputting duct blockage information based on the output power of the power conversion device and a sampled temperature at at least one location in the power conversion device includes:

[0031] The output power of the power conversion device and the sampled temperature at at least one location in the power conversion device are input into the blockage detection model to obtain the duct blockage information output by the blockage detection model. The blockage detection model is trained using training samples with labeled duct blockage information. The training samples include the sampled temperature and ambient temperature at each location under the output power of the power conversion device.

[0032] In one possible implementation, the duct blockage handling method further includes:

[0033] When the power conversion device is in the start-up state, the fan is controlled to reverse according to the preset default fan reversal parameters;

[0034] or

[0035] When the power conversion device is in standby mode, the fan is controlled to reverse according to the preset default fan reversal parameters.

[0036] In one possible implementation, the location in the power conversion device used to obtain the sampling temperature includes at least one of the following: an air inlet, an air outlet, and a power device.

[0037] A second aspect of this application provides a power conversion device, comprising: at least one processor and a memory connected to the processor, wherein:

[0038] The memory is used to store computer programs;

[0039] The processor is used to execute the computer program so that the power conversion device can implement the air duct blockage treatment method of the first aspect or any implementation thereof.

[0040] A third aspect of this application provides a computer program product including computer-readable instructions that, when executed on a power conversion device, cause the power conversion device to implement the air duct blockage handling method described in the first aspect or any implementation thereof.

[0041] The fourth aspect of this application provides a computer storage medium carrying one or more computer programs, which, when executed by a power conversion device, enable the power conversion device to implement the air duct blockage handling method described in the first aspect or any implementation thereof.

[0042] By utilizing the above technical solution, this application provides a method for handling air duct blockage. By acquiring the output power of the power conversion device and the temperature at at least one location within the power conversion device, and outputting air duct blockage information based on the output power and temperature at at least one location within the power conversion device, the method achieves real-time detection of air duct blockage in the power conversion device. When the air duct blockage information indicates air duct blockage, the method controls the fan in the power conversion device to reverse and clear foreign objects from the air duct, thereby achieving automatic handling of air duct blockage without requiring manual shutdown to clear foreign objects from the air duct and reducing maintenance labor costs. Attached Figure Description

[0043] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0044] Figure 1 A schematic flowchart illustrating a method for handling air duct blockage provided in an embodiment of this application;

[0045] Figure 2 A schematic flowchart illustrating another method for handling air duct blockage provided in this application embodiment;

[0046] Figure 3 This is a schematic diagram of a duct blockage treatment device provided in an embodiment of this application. Detailed Implementation

[0047] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.

[0048] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0049] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0050] This application provides a method for handling air duct blockage. The method for handling air duct blockage according to this application will be described in detail below with reference to the accompanying drawings.

[0051] Reference Figure 1 , Figure 1 This application provides a flowchart illustrating a method for handling air duct blockage, as shown in the embodiments below. Figure 1 As shown in the embodiment of this application, a method for handling air duct blockage may include steps 101 to 103, which are described in detail below.

[0052] 101: Obtain the output power of the power conversion device and the sampling temperature at at least one location within the power conversion device;

[0053] The power conversion equipment can be an inverter, an energy storage converter, or other similar devices; this application does not impose any specific limitations.

[0054] The output power of the power conversion device and the sampling temperature at at least one location in the power conversion device can be acquired periodically, with the sampling period preset.

[0055] There are several ways to obtain the output power of a power conversion device. One method is to obtain the current and voltage of the power converter and then calculate the output power based on the current and voltage. Another method is to use a power measurement device to measure the output power. If the power conversion device includes a power monitoring module, the output power monitored by the power monitoring module can also be read.

[0056] For example, the sampling temperature at at least one location in the power conversion device is the sampling temperature of at least one of the air inlet, air outlet, and power device, wherein the power device includes reactors, power modules, etc.

[0057] It should be noted that the sampling temperature at at least one location in the power conversion device is positively correlated with the output power of the power conversion device; that is, the higher the output power of the power conversion device, the higher the sampling temperature at at least one location in the power conversion device.

[0058] 102: Output duct blockage information based on the output power of the power conversion device and the sampled temperature at at least one location within the power conversion device;

[0059] When the air duct of a power conversion device is blocked, the heat in the power conversion device cannot be quickly discharged through the air duct, and the sampling temperature at at least one location in the power conversion device rises to a higher level than the temperature at that location when the air duct is not blocked.

[0060] The higher the output power of the power conversion device, the higher the sampling temperature at at least one location within the device. Therefore, the temperature at at least one location within the power conversion device will differ under different output power conditions, assuming the duct is not blocked. Thus, based on the output power of the power conversion device and the sampling temperature at at least one location within it, it is possible to determine whether the duct of the power conversion device is blocked. In one possible implementation, the blockage level of the duct can also be determined based on the output power of the power conversion device and the sampling temperature at at least one location within it.

[0061] There are multiple ways to output duct blockage information based on the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device.

[0062] For example, the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device are input into a machine learning model to output duct blockage information.

[0063] For example, by comparing the sampled temperature at at least one location in the power conversion device with a pre-calibrated temperature under the output power of the power conversion device, air duct blockage information is output, wherein the pre-calibrated temperature is the temperature of the power conversion device at that location when the air duct is not blocked.

[0064] The above two methods are merely examples, and this application is not limited to them.

[0065] 103: When the duct blockage information indicates duct blockage, control the fan in the power conversion device to reverse.

[0066] When the fan rotates forward, air flows from the air inlet to the air outlet, carrying dust, sand, willow catkins, and other foreign objects into the air duct. By controlling the fan to rotate in reverse, the airflow direction is completely opposite to that when the fan rotates forward. The reverse airflow generates a reverse thrust, which peels the foreign objects attached to the air duct from the air duct and discharges them through the air outlet, thus automatically handling air duct blockages.

[0067] This embodiment discloses a method for handling air duct blockage. By acquiring the output power of a power conversion device and the temperature at at least one location within the power conversion device, air duct blockage information is output based on the output power and temperature at at least one location within the power conversion device. This enables real-time detection of air duct blockage in the power conversion device. When the air duct blockage information indicates air duct blockage, the fan in the power conversion device is controlled to reverse to clear foreign objects from the air duct. This achieves automatic handling of air duct blockage without requiring manual shutdown to clear foreign objects from the air duct, reducing maintenance labor costs, and without requiring additional hardware costs.

[0068] In one possible implementation, the duct blockage information output in the above embodiments includes a blockage level, for example, high, medium, and low. The implementation of step 103 in the above embodiments includes the following steps 1031-1032:

[0069] 1031: Based on the pre-set correspondence between the blockage level and the fan reversal parameter, output the target fan reversal parameter corresponding to the blockage level in the duct blockage information;

[0070] The target fan reversal parameters include the number of reversals and the reversal time for each reversal. The blockage level is positively correlated with the number of reversals and the reversal time. That is, the higher the blockage level, the more reversals there are and the longer the reversal time.

[0071] 1032: Control the fan to reverse according to the target fan reversal parameters.

[0072] That is, control the fan to reverse according to the target fan reversal parameters.

[0073] In one possible implementation, when the duct blockage information indicates duct blockage, an alarm message can also be generated and the duct blockage time can be recorded. That is, the timer starts from the output of the duct blockage information and the duct blockage time is recorded to record whether the duct blockage is handled in a timely manner.

[0074] To monitor the air duct clearing status in real time and automatically identify the air duct recovery status, in one possible implementation, after the fan reverses, the current output power of the power conversion device and the sampled temperature at at least one location within the power conversion device are acquired. Based on the output power of the power conversion device and the sampled temperature at at least one location within the power conversion device, air duct blockage information is output. If the air duct blockage information indicates that the air duct is not blocked, the alarm information is deleted and the air duct blockage time is reset to zero.

[0075] In another possible implementation, after the fan reverses, the output power of the current power conversion device and the sampled temperature at at least one location within the power conversion device are acquired. Based on these parameters, duct blockage information is output. If the duct blockage time is less than a threshold, the fan is reversed to continue clearing obstructions from the duct. If the blockage time is not less than the threshold, continuing fan reversal may not clear the obstructions, so an alarm is sent to the target terminal device to facilitate manual intervention. The threshold can be set according to the specific application scenario. When controlling fan reversal, the target fan reversal parameter corresponding to the blockage level in the duct blockage information can be used. The target terminal device can be a maintenance personnel's device, such as a smartphone, tablet, or office computer, or it can be a cloud server.

[0076] Please refer to Figure 2 , Figure 2 This is a schematic flowchart of another method for handling air duct blockage provided in an embodiment of this application, as shown below. Figure 2 As shown in the embodiment of this application, another method for handling air duct blockage may include the following steps 201-210:

[0077] 201: Obtain the output power of the power conversion device and the sampling temperature at at least one location within the power conversion device;

[0078] 202: Output duct blockage information based on the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device;

[0079] 203: Does the information on air duct blockage indicate air duct blockage?

[0080] If the duct blockage information indicates that the duct is not blocked, execute 204: Is there an alarm message?

[0081] If no alarm information is found, proceed to step 201;

[0082] If an alarm message exists, proceed to step 205: delete the alarm message, reset the duct blockage time to zero, and return to step 201.

[0083] If the air duct blockage information indicates that the air duct is blocked, execute 206: Is there an alarm message?

[0084] If no alarm information is found, execute 207: Generate alarm information, record the duct blockage time, and control the fan in the power conversion device to reverse.

[0085] If an alarm message is present, execute step 208: Is the duct blockage time less than the threshold?

[0086] If the duct blockage time is less than the threshold, execute 209: reverse the fan in the power conversion device;

[0087] If the duct blockage time is not less than the threshold, execute 210: send an alarm message to the target terminal device.

[0088] In the above embodiments, steps 102 and 202, based on the output power of the power conversion device and the sampling temperature at at least one location in the power conversion device, can be implemented in various ways to output duct blockage information.

[0089] In one possible implementation, duct blockage information is output based on the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device, including the following steps A1-A3:

[0090] A1: Based on the pre-calibrated power-temperature curves of the power conversion equipment at each location under unobstructed air duct conditions, output the temperature at each location corresponding to the output power of the power conversion equipment;

[0091] For a given location within a power conversion device, the power-temperature curve characterizes the temperature at that location corresponding to different output powers when the air duct is unobstructed. Therefore, based on the power-temperature curves for each location within the power conversion device, the temperature at each location corresponding to the output power of the power conversion device can be obtained.

[0092] In one possible implementation, the method for calibrating the power-temperature curves at various locations within a power conversion device includes: using a machine learning model to learn the linear relationship between temperature and output power at different locations of the power conversion device under unobstructed airflow conditions from sample data, thereby obtaining the power-temperature curves at each location within the power conversion device. The sample data includes the sampled temperature at each location of the power conversion device under different output power conditions under unobstructed airflow conditions.

[0093] Furthermore, ambient temperature affects the sampling temperature at each location of the power conversion device under different output power conditions. For example, the higher the ambient temperature, the higher the sampling temperature at each location of the power conversion device at the same output power; conversely, the lower the ambient temperature, the lower the sampling temperature at each location of the power conversion device at the same output power. To ensure the reliability of the sample data, the temperature difference between the ambient temperature of the sample data and the ambient temperature of the current date should not be too large. The sample data can be obtained within a preset number of days from the current date. The preset number of days is set according to the actual application scenario. For example, the preset number of days can be 10 days, meaning that sample data is obtained within 0-10 days from the current date.

[0094] Furthermore, to ensure the validity of the sample data, the output power of the power conversion devices in the sample data collected on the same day is greater than the product of the rated power and the preset ratio. For example, the output power of the power conversion devices in the sample data collected on the same day is greater than 51% of the rated power.

[0095] A2: Calculate the temperature deviation between the sampling temperature at each location corresponding to the output power of the power conversion device and the above temperature;

[0096] A3: Output duct blockage information based on whether the temperature deviation value at each location in the power conversion device is greater than the threshold.

[0097] Because the temperature increase at different locations in the power conversion device may vary with the increase in output power, the threshold values ​​at different locations in the power conversion device are not exactly the same.

[0098] It should be noted that the more locations with temperature deviation values ​​greater than the threshold, the higher the degree of air duct blockage and the higher the blockage level. Therefore, a correspondence between the number of locations with temperature deviation values ​​greater than the threshold and the blockage level can be set.

[0099] In another possible implementation, duct blockage information is output based on the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device, including: inputting the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device into a blockage detection model to obtain the duct blockage information output by the blockage detection model.

[0100] The blockage detection model is trained using training samples with labeled duct blockage information. These training samples include the sampled temperature and ambient temperature at each location under the output power of the power conversion equipment. The blockage detection model can be a regression model, a time series model, etc.

[0101] In one possible implementation, to remove foreign objects from the air duct without obstructing its operation and without affecting the normal functioning of the power conversion equipment, the fan can be controlled to reverse according to a pre-set default fan reversal parameter when the power conversion equipment is in the startup state, or when the power conversion equipment is in the standby state. In other words, the fan can be controlled to reverse only when the power conversion equipment is in the startup state or only when it is in the standby state, or the fan can be controlled to reverse in both the startup and standby states separately to prevent the accumulation of foreign objects in the air duct from causing blockage.

[0102] The above describes a method for handling air duct blockage provided by the embodiments of this application. The following describes the apparatus for performing the above-described air duct blockage handling method.

[0103] Please see Figure 3 , Figure 3 This is a schematic diagram of a duct blockage treatment device provided in an embodiment of this application. Figure 3 As shown, the duct blockage treatment device includes:

[0104] The acquisition unit 301 is used to acquire the output power of the power conversion device and the sampling temperature at at least one location in the power conversion device;

[0105] Output unit 302 is used to output duct blockage information based on the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device;

[0106] Control unit 303 is used to control the fan in the power conversion device to reverse when the air duct blockage information indicates that the air duct is blocked.

[0107] In one possible implementation, the control unit 303 is specifically configured to output a target fan reversal parameter corresponding to the duct blockage level in the duct blockage information according to a pre-set correspondence between the blockage level and the fan reversal parameter, wherein the target fan reversal parameter includes: the number of reversals and the reversal time; and control the fan to reverse according to the target fan reversal parameter.

[0108] In one possible implementation, the duct blockage treatment device further includes:

[0109] The generation unit is used to generate alarm information and record the duct blockage time when the duct blockage information indicates that the duct is blocked.

[0110] In one possible implementation, the duct blockage treatment device further includes:

[0111] The deletion unit is used to delete the alarm information and reset the duct blockage time to zero if the duct blockage information indicates that the duct is not blocked.

[0112] In one possible implementation, the control unit is configured to, when the duct blockage information indicates duct blockage, control the fan to reverse if the duct blockage time is less than a threshold; and send the alarm information to the target terminal device if the duct blockage time is not less than the threshold.

[0113] In one possible implementation, the output unit is specifically configured to output the temperature at each location corresponding to the output power of the power conversion device, based on the pre-calibrated power-temperature curves of the power conversion device at each location when the duct is not blocked; calculate the temperature deviation value between the sampled temperature at each location corresponding to the output power of the power conversion device and the temperature; and output the duct blockage information based on whether the temperature deviation value corresponding to each location in the power conversion device is greater than a threshold, wherein the threshold values ​​corresponding to each location in the power conversion device are not completely the same.

[0114] In one possible implementation, the duct blockage treatment device further includes:

[0115] The calibration unit is used to learn the linear relationship between temperature and output power at different locations of the power conversion device in the sample data when the air duct is not blocked, using a machine learning model, and to obtain the power-temperature curves at each location of the power conversion device.

[0116] In one possible implementation, the output unit is specifically used to input the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device into the blockage detection model to obtain the duct blockage information output by the blockage detection model. The blockage detection model is trained using training samples labeled with duct blockage information. The training samples include the sampled temperature and ambient temperature at each location under the output power of the power conversion device.

[0117] In one possible implementation, the control unit is further configured to control the fan to reverse according to a preset default fan reversal parameter when the power conversion device is in the start-up state; or to control the fan to reverse according to a preset default fan reversal parameter when the power conversion device is in the standby state.

[0118] This application discloses a duct blockage handling device that acquires the output power of a power conversion device and the temperature at at least one location within the power conversion device. Based on the output power and the temperature at at least one location within the power conversion device, it outputs duct blockage information, enabling real-time detection of duct blockage in the power conversion device. When the duct blockage information indicates duct blockage, it controls the fan in the power conversion device to reverse and clear foreign objects from the duct, thus achieving automatic handling of duct blockage without requiring manual shutdown to clear foreign objects from the duct, reducing maintenance labor costs, and without requiring additional hardware costs.

[0119] This application embodiment also provides a power conversion device, including at least one processor and a memory connected to the processor, wherein:

[0120] The memory is used to store computer programs;

[0121] The processor is used to execute the computer program so that the power conversion device can implement any of the air duct blockage treatment methods provided in the embodiments of this application.

[0122] It should be noted that power conversion equipment also includes power devices, fans, and other components.

[0123] This application also provides a computer program product including computer-readable instructions, which, when executed on a power conversion device, cause the power conversion device to implement any of the duct blockage handling methods provided in this application.

[0124] This application also provides a computer-readable storage medium carrying one or more computer programs. When the one or more computer programs are executed by a power conversion device, the power conversion device can implement any of the air duct blockage handling methods provided in this application.

[0125] It should also be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. In addition, in the device embodiment drawings provided in this application, the connection relationship between modules indicates that they have a communication connection, which can be implemented as one or more communication buses or signal lines.

[0126] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware, or it can be implemented by special-purpose hardware including application-specific integrated circuits, special-purpose CPUs, special-purpose memory, special-purpose components, etc. Generally, any function performed by a computer program can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be diverse, such as analog circuits, digital circuits, or special-purpose circuits. However, for this application, software program implementation is more often the preferred implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium, such as a computer floppy disk, USB flash drive, mobile hard disk, ROM, RAM, magnetic disk, or optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, training equipment, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0127] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product.

[0128] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, training device, or data center to another website, computer, training device, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).

Claims

1. A method for treating air duct blockage, characterized in that, include: The output power of the power conversion device and the sampled temperature at at least one location in the power conversion device are obtained; Based on the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device, the duct blockage information is output. When the air duct blockage information indicates that the air duct is blocked, the fan in the power conversion device is controlled to reverse.

2. The method for treating air duct blockage according to claim 1, characterized in that, The control of the fan in the power conversion device to reverse direction includes: Based on the pre-set correspondence between the blockage level and the fan reversal parameter, the target fan reversal parameter corresponding to the blockage level in the duct blockage information is output. The target fan reversal parameter includes: the number of reversals and the reversal time. The fan is controlled to reverse according to the target fan reversal parameters.

3. The method for treating air duct blockage according to claim 1, characterized in that, The method for handling air duct blockage also includes: When the air duct blockage information indicates that the air duct is blocked, an alarm message is generated and the air duct blockage time is recorded.

4. The method for treating air duct blockage according to claim 3, characterized in that, The method for handling air duct blockage also includes: After the fan reverses, the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device are obtained. Based on the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device, the duct blockage information is output. If the air duct blockage information indicates that the air duct is not blocked, delete the alarm information and reset the air duct blockage time to zero.

5. The method for treating air duct blockage according to claim 3, characterized in that, The method for handling air duct blockage also includes: After the fan reverses, the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device are obtained. Based on the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device, the duct blockage information is output. If the duct blockage information indicates duct blockage, and the duct blockage time is less than a threshold, then the fan is controlled to reverse. If the duct blockage time is not less than the threshold, the alarm information is sent to the target terminal device.

6. The method for treating air duct blockage according to any one of claims 1, 4, and 5, characterized in that, The step of outputting duct blockage information based on the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device includes: Based on the pre-calibrated power-temperature curves of the power conversion device at various locations under unobstructed air duct conditions, output the temperature at each location corresponding to the output power of the power conversion device; Calculate the temperature deviation between the sampling temperature at each location corresponding to the output power of the power conversion device and the temperature; The air duct blockage information is output based on whether the temperature deviation value corresponding to each position in the power conversion device is greater than a threshold value. The threshold values ​​corresponding to each position in the power conversion device are not exactly the same.

7. The method for treating air duct blockage according to claim 6, characterized in that, The methods for calibrating the power temperature profiles at various locations within the power conversion device include: Using a machine learning model, the linear relationship between temperature and output power at different locations of the power conversion device in the sample data is learned when the air duct is not blocked, and the power-temperature curves at each location of the power conversion device are obtained.

8. The method for treating air duct blockage according to claim 7, characterized in that, The sample data was obtained within a preset number of days from the current date, and the output power of the power conversion device in the sample data collected on the same day was greater than the product of the rated power and the preset ratio.

9. The method for treating air duct blockage according to any one of claims 1, 4, and 5, characterized in that, The step of outputting duct blockage information based on the output power of the power conversion device and the sampled temperature at at least one location in the power conversion device includes: The output power of the power conversion device and the sampled temperature at at least one location in the power conversion device are input into the blockage detection model to obtain the duct blockage information output by the blockage detection model. The blockage detection model is trained using training samples with labeled duct blockage information. The training samples include the sampled temperature and ambient temperature at each location under the output power of the power conversion device.

10. The method for treating air duct blockage according to claim 1, characterized in that, The method for handling air duct blockage also includes: When the power conversion device is in the start-up state, the fan is controlled to reverse according to the preset default fan reversal parameters; or When the power conversion device is in standby mode, the fan is controlled to reverse according to the preset default fan reversal parameters.

11. The method for treating air duct blockage according to claim 1, characterized in that, The locations used to obtain the sampling temperature in the power conversion device include at least one of the following: air inlet, air outlet, and power device.

12. A power conversion device, characterized in that, It includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program to enable the power conversion device to implement the duct blockage treatment method as described in any one of claims 1 to 11.

13. A computer program product, characterized in that, Includes computer-readable instructions that, when executed on a power conversion device, cause the power conversion device to implement the duct blockage treatment method as described in any one of claims 1 to 11.

14. A computer storage medium, characterized in that, The storage medium carries one or more computer programs, which, when executed by the power conversion device, enable the power conversion device to implement the duct blockage treatment method as described in any one of claims 1 to 11.

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