Rectifier secondary fault early warning method, device and equipment and storage medium

Abstract

The invention provides a rectifier secondary fault early warning method, device and equipment and a storage medium, which can be applied to the technical field of electric appliance fault detection, and the method comprises the following steps: in response to a fault of a first switch tube in a plurality of switch tubes included in a rectifier, obtaining respective current measurement data of a plurality of second switch tubes, the plurality of second switch tubes comprise switch tubes except the first switch tube in the plurality of switch tubes; based on the respective reference measurement data and the current measurement data of the plurality of second switch tubes, determining the respective electrical safety degrees of the plurality of second switch tubes; and carrying out secondary fault early warning on the rectifier based on the respective electrical safety degrees of the plurality of second switch tubes.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical fault detection, and more specifically, to a rectifier secondary fault early warning method, device, equipment and storage medium. Background Art

[0002] With the rapid development of semiconductor technology, power switch tubes are widely used in energy control, transmission and conversion. However, due to the complex working environment, high-power operating conditions, and frequent and high-speed switching processes, power switch tubes have become one of the most prone to failure in energy systems. Therefore, early fault detection of power switch tubes and early warning measures can avoid system failures and improve the safety and reliability of energy systems.

[0003] However, the fault detection of power switch tubes usually relies mainly on regular inspection and maintenance, which leads to the faults being ignored or handled only after the faults actually occur, and it is impossible to provide early warning of the faults. In addition, when performing fault detection on power switch tubes, it is usually necessary to rely on engineers or technicians to manually detect and diagnose the equipment, resulting in the fault detection process being affected by human bias, subjective judgment and lack of experience, and there are limitations, which in turn leads to poor accuracy of secondary fault warning. Summary of the invention

[0004] In view of this, the present invention provides a rectifier secondary fault early warning method, device, equipment, storage medium and program product.

[0005] One aspect of the present invention provides a rectifier secondary fault warning method, comprising: in response to a failure of a first switch tube among multiple switch tubes included in a rectifier, obtaining current measurement data of each of multiple second switch tubes, wherein the multiple second switch tubes include switch tubes among the multiple switch tubes except the first switch tube; based on the respective baseline measurement data and current measurement data of the multiple second switch tubes, determining the electrical safety of each of the multiple second switch tubes; and based on the electrical safety of each of the multiple second switch tubes, performing a secondary fault warning of the rectifier.

[0006] According to an embodiment of the present invention, the benchmark measurement data of the second switch tube includes a benchmark operating current and a benchmark operating voltage of the second switch tube, and the current measurement data of the second switch tube includes a current operating current and a current operating voltage of the second switch tube; wherein, the electrical safety of each of the multiple second switch tubes is determined based on the benchmark measurement data and the current measurement data of each of the multiple second switch tubes, including: for each second switch tube, based on the benchmark operating current and the benchmark operating voltage of the second switch tube, obtaining the benchmark operating point of the second switch tube; based on the current operating current and the current operating voltage of the second switch tube, obtaining the current operating point of the second switch tube; and based on the respective positions of the benchmark operating point and the current operating point in the safe operating area of ​​the second switch tube, obtaining the electrical safety of the second switch tube, wherein the safe operating area of ​​the second switch tube is determined based on the electrical limit parameters of the second switch tube, and the electrical limit parameters include the peak current, breakdown voltage and pulse power consumption of the power switch tube.

[0007] According to an embodiment of the present invention, the safe operating area of ​​the second switch tube is defined by the on-state voltage drop limit line, the current limit line, the pulse power limit line and the voltage limit line of the second switch tube; wherein the electrical safety of the second switch tube is obtained based on the positions of the reference operating point and the current operating point in the safe operating area of ​​the second switch tube, including: obtaining a first per-unit distance based on the vertical distances from the reference operating point and the current operating point to the on-state voltage drop limit line; obtaining a second per-unit distance based on the vertical distances from the reference operating point and the current operating point to the current limit line; obtaining a third per-unit distance based on the vertical distances from the reference operating point and the current operating point to the pulse power limit line; obtaining a fourth per-unit distance based on the vertical distances from the reference operating point and the current operating point to the voltage limit line; and obtaining the electrical safety of the second switch tube based on the minimum value of the first per-unit distance, the second per-unit distance, the third per-unit distance and the fourth per-unit distance.

[0008] According to an embodiment of the present invention, the secondary fault warning of the rectifier is performed based on the electrical safety of each of the multiple second switching tubes, including: determining the logical relationship between each of the multiple second switching tubes based on the topological structure of the rectifier; processing the electrical safety of each of the multiple second switching tubes based on the logical relationship between each of the multiple second switching tubes to obtain the reliability of the rectifier; and performing a secondary fault warning of the rectifier based on the reliability of the rectifier.

[0009] According to an embodiment of the present invention, the logical relationship between each of the above-mentioned multiple second switching tubes includes a series relationship and a parallel relationship; wherein, based on the logical relationship between each of the above-mentioned multiple second switching tubes, the electrical safety of each of the above-mentioned multiple second switching tubes is processed to obtain the reliability of the above-mentioned rectifier, including: based on the logical relationship between each of the above-mentioned multiple second switching tubes, the above-mentioned rectifier is divided into at least one series part, each series part includes at least one switching tube; based on the series relationship and parallel relationship between each of the at least one switching tube included in the above-mentioned series part, the electrical safety of each of the at least one switching tube included in the above-mentioned series part is processed to obtain the reliability of the above-mentioned series part; and based on the product of the reliabilities of each of the above-mentioned at least one series part, the reliability of the above-mentioned rectifier is obtained.

[0010] According to an embodiment of the present invention, the secondary fault warning of the rectifier based on the reliability of the rectifier includes: when the reliability of the rectifier is less than the reliability threshold, determining at least one target switch tube from the multiple second switch tubes based on the electrical safety threshold and the electrical safety of each of the multiple second switch tubes; and generating warning feedback information based on the at least one target switch tube to perform a secondary fault warning of the rectifier.

[0011] According to an embodiment of the present invention, the method further includes: determining a reliability threshold of the rectifier based on electrical influencing factors, thermal influencing factors, mechanical stress influencing factors, operating environment influencing factors and product quality influencing factors of the rectifier.

[0012] Another aspect of the present invention provides a rectifier secondary fault warning device, including: an acquisition module, used to obtain current measurement data of each of a plurality of second switch tubes in response to a failure of a first switch tube among a plurality of switch tubes included in the rectifier, wherein the plurality of second switch tubes include switch tubes among the plurality of switch tubes except the first switch tube; a determination module, used to determine the electrical safety of each of the plurality of second switch tubes based on the respective baseline measurement data and current measurement data of the plurality of second switch tubes; and a warning module, used to perform a secondary fault warning of the rectifier based on the electrical safety of each of the plurality of second switch tubes.

[0013] Another aspect of the present invention provides an electronic device, comprising: one or more processors; and a memory for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned method.

[0014] Another aspect of the present invention provides a computer-readable storage medium storing computer-executable instructions, which are used to implement the above method when executed.

[0015] Another aspect of the present invention provides a computer program product, the computer program product comprising computer executable instructions, and the instructions are used to implement the above method when executed.

[0016] According to the embodiment of the present invention, by timely acquiring the current measurement data of the second switch tube after the first switch tube fails, and determining the electrical safety of the second switch tube based on the current measurement data of the second switch tube and the reference measurement data, not only can the electrical safety of the second switch tube be evaluated in a timely manner, but also the change of the operating state of the second switch tube after the failure of the first switch tube can be accurately characterized by the electrical safety. In addition, by performing a secondary fault warning of the rectifier based on the electrical safety of the second switch tube, the interference of human factors in manual detection and fault warning can be avoided, and the accuracy of secondary fault prediction can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings.

[0018] Figure 1 A flow chart of a rectifier secondary fault early warning method according to an embodiment of the present invention is shown.

[0019] Figure 2A A schematic diagram of a safe operating area according to a specific embodiment of the present invention is shown.

[0020] Figure 2B A schematic diagram of determining a vertical distance according to a specific embodiment of the present invention is shown.

[0021] Figure 3 A structural schematic diagram of a rectifier according to a specific embodiment of the present invention is shown.

[0022] Figure 4 A block diagram of a rectifier secondary fault early warning device according to an embodiment of the present invention is shown.

[0023] Figure 5 A block diagram of an electronic device suitable for implementing a rectifier secondary fault early warning method according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0024] Below, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of embodiments of the present invention. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of concepts of the present invention.

[0025] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0026] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0027] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0028] In the embodiments of the present invention, the collection, updating, analysis, processing, use, transmission, provision, disclosure, storage and other aspects of the data involved (for example, including but not limited to user personal information) are in compliance with the provisions of relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. In particular, necessary measures are taken for user personal information to prevent illegal access to user personal information data and maintain the security of user personal information, network security and national security.

[0029] In the embodiment of the present invention, before obtaining or collecting the user's personal information, the user's authorization or consent is obtained.

[0030] Fault detection of power switch tubes usually relies mainly on regular inspection and maintenance, which can lead to faults being ignored or handled only after they actually occur. When performing fault detection on power switch tubes, it is usually necessary to rely on engineers or technicians to manually inspect and diagnose the equipment.

[0031] Secondary fault diagnosis generally includes two methods. One is the failure physics method, which obtains relevant device aging data through accelerated cycle stress experiments or real-time sampling of the system in actual operation, and establishes failure mechanism and life prediction models based on the relevant device aging data. However, due to the large number of rectifier devices, the installation of measurement modules is not only large in number and increases the system volume, but also may cause electromagnetic interference to the rectifier, affecting the stability and safety of the rectification. In addition, when the system is in operation for a short time, the lack of relevant device aging data will result in poor accuracy of secondary fault warning.

[0032] The other is to build a reliability block diagram for the system and estimate the failure rate of each device in the system according to the current reliability standard calculation method to achieve system reliability assessment. However, the manual assessment method is affected by human bias, subjective judgment and lack of experience, and has limitations, resulting in poor accuracy of secondary fault warning.

[0033] An embodiment of the present invention provides a rectifier secondary fault warning method, comprising: in response to a failure of a first switch tube among multiple switch tubes included in a rectifier, obtaining current measurement data of each of multiple second switch tubes, wherein the multiple second switch tubes include switch tubes other than the first switch tube among the multiple switch tubes; determining the electrical safety of each of the multiple second switch tubes based on the respective baseline measurement data and current measurement data of the multiple second switch tubes; and performing a secondary fault warning of the rectifier based on the respective electrical safety of the multiple second switch tubes.

[0034] The embodiments of the present invention use the existing mature data and sensor acquisition technology, take high-precision measurement data, and are less affected by the environment. Based on the measurement data, the electrical safety of the power switch tube is analyzed, providing objective and accurate fault prediction and diagnosis, and reducing the interference of human factors.

[0035] Figure 1 A flow chart of a rectifier secondary fault early warning method according to an embodiment of the present invention is shown.

[0036] like Figure 1 As shown, the method includes operations S110 to S130.

[0037] In operation S110 , in response to a failure of a first switch tube among a plurality of switch tubes included in a rectifier, current measurement data of each of a plurality of second switch tubes is obtained.

[0038] According to an embodiment of the present invention, the plurality of second switch tubes include switch tubes other than the first switch tube among the plurality of switch tubes, that is, the second switch tube may be a switch tube in the rectifier that has not failed. Specifically, the failure may be an open circuit failure, and the second switch tube includes a power switch tube.

[0039] According to an embodiment of the present invention, the current measurement data may represent the measurement data of the second switch tube when a rectifier fails, and may specifically include the operating current and operating voltage of the second switch tube after the first switch tube fails.

[0040] According to an embodiment of the present invention, the current measurement data may be obtained by measuring the second switch tube using a sensor after the first switch tube fails.

[0041] In operation S120 , the electrical safety of each of the plurality of second switching tubes is determined based on the respective reference measurement data and the current measurement data of the plurality of second switching tubes.

[0042] According to an embodiment of the present invention, the reference measurement data may represent measurement data of the second switch tube under normal operating conditions of the rectifier, and may specifically include operating current and operating voltage of the second switch tube before a failure of the first switch tube occurs.

[0043] According to an embodiment of the present invention, the reference measurement data may be obtained by measuring the second switch tube using a sensor before the first switch tube fails.

[0044] According to an embodiment of the present invention, the electrical safety degree can be used to characterize the operating state of the second switch tube at the current moment. Specifically, the higher the electrical safety degree, the healthier the second switch tube is and the less likely it is to fail.

[0045] According to an embodiment of the present invention, the electrical safety level may be determined according to the degree of deviation of current measurement data relative to reference measurement data.

[0046] In operation S130, a secondary fault warning of the rectifier is performed based on the electrical safety of each of the plurality of second switch tubes.

[0047] According to an embodiment of the present invention, the secondary fault of the rectifier is usually concentrated on the second switch tube that has not failed, that is, the operating state of the second switch tube is associated with the secondary fault of the rectifier. The healthier the operating state of the second switch tube, the lower the probability of a secondary fault, and vice versa.

[0048] According to an embodiment of the present invention, the electrical safety of the rectifier can be determined based on the electrical safety of the second switch tube, and then it can be predicted whether the rectifier will have a secondary fault based on the electrical safety of the rectifier, and a secondary fault warning can be performed.

[0049] According to the embodiment of the present invention, since multiple second switch tubes in the rectifier have mutual influences, all the second switch tubes may be considered when performing secondary fault warning.

[0050] According to the embodiment of the present invention, by timely acquiring the current measurement data of the second switch tube after the first switch tube fails, and determining the electrical safety of the second switch tube based on the current measurement data of the second switch tube and the reference measurement data, not only can the electrical safety of the second switch tube be evaluated in a timely manner, but also the change of the operating state of the second switch tube after the failure of the first switch tube can be accurately characterized by the electrical safety. In addition, by performing a secondary fault warning of the rectifier based on the electrical safety of the second switch tube, the interference of human factors in manual detection and fault warning can be avoided, and the accuracy of secondary fault prediction can be improved.

[0051] According to an embodiment of the present invention, the electrical safety of each of the plurality of second switch tubes is determined based on respective reference measurement data and current measurement data of the plurality of second switch tubes, including: for each second switch tube, based on the reference operating current and reference operating voltage of the second switch tube, obtaining the reference operating point of the second switch tube; based on the current operating current and current operating voltage of the second switch tube, obtaining the current operating point of the second switch tube; and based on the respective positions of the reference operating point and the current operating point in the safe operating area of ​​the second switch tube, obtaining the electrical safety of the second switch tube.

[0052] According to an embodiment of the present invention, the reference measurement data of the second switch tube includes a reference operating current and a reference operating voltage of the second switch tube, and the current measurement data of the second switch tube includes a current operating current and a current operating voltage of the second switch tube.

[0053] According to an embodiment of the present invention, the reference operating current and the reference operating voltage of the second switch tube may be respectively the maximum operating current and the maximum operating voltage of the second switch tube when the first switch tube does not have an open circuit fault. The current operating current and the current operating voltage of the second switch tube may be respectively the maximum operating current and the maximum operating voltage of the second switch tube after the first switch tube has an open circuit fault.

[0054] According to an embodiment of the present invention, a two-dimensional coordinate system representing the operating state of the second switch tube may be determined with the operating voltage as the horizontal axis and the operating current as the vertical axis.

[0055] According to an embodiment of the present invention, the horizontal coordinate value of the reference operating point can be determined according to the reference operating voltage, and the vertical coordinate value of the reference operating point can be determined according to the reference operating current, so that the position of the reference operating point in the two-dimensional coordinate system can be determined.

[0056] According to an embodiment of the present invention, the horizontal coordinate value of the current operating point can be determined according to the current operating voltage, and the vertical coordinate value of the current operating point can be determined according to the current operating current, and then the position of the current operating point in the two-dimensional coordinate system can be determined.

[0057] According to the embodiments of the present invention, in order to ensure that the switch tube can operate safely and stably and to increase its service life, its electrical limit parameters such as peak current, breakdown voltage and pulse power consumption are often limited.

[0058] According to an embodiment of the present invention, the safe operating area of ​​the second switch tube is determined based on the electrical limit parameters of the second switch tube, and the electrical limit parameters include the peak current, breakdown voltage and pulse power consumption of the power switch tube. If the operating point is within the safe operating area, the second switch tube can operate normally. If the operating point exceeds the safe operating area, the second switch tube is likely to fail and cause damage.

[0059] According to an embodiment of the present invention, a safe operating area can be determined in a two-dimensional coordinate system based on electrical limit parameters. Specifically, a range that does not exceed the electrical limit parameters can be determined as a safe operating area, and a range that exceeds the electrical limit parameters can be determined as an unsafe operating area.

[0060] According to an embodiment of the present invention, the position of the operating point in the safe working area can characterize the working state of the second switch tube. Therefore, the working state of the second switch tube before and after the fault can be determined according to the positions of the current operating point and the reference operating point in the safe working area.

[0061] According to an embodiment of the present invention, the electrical safety of the second switch tube can be determined according to the degree of deviation between the position of the current operating point in the safe operating area and the position of the reference operating point in the safe operating area.

[0062] According to an embodiment of the present invention, the electrical safety of the second switch tube is obtained based on the positions of the reference operating point and the current operating point in the safe operating area of ​​the second switch tube, so that the obtained electrical safety can accurately characterize the change in the operating state of the second switch tube after a failure of the first switch tube, thereby improving the accuracy of the secondary fault warning.

[0063] According to an embodiment of the present invention, based on the positions of the reference operating point and the current operating point in the safe operating area of ​​the second switch tube, the electrical safety of the second switch tube is obtained, including: obtaining a first per-unit distance based on the vertical distances from the reference operating point and the current operating point to the on-state voltage drop limit line; obtaining a second per-unit distance based on the vertical distances from the reference operating point and the current operating point to the current limit line; obtaining a third per-unit distance based on the vertical distances from the reference operating point and the current operating point to the pulse power limit line; obtaining a fourth per-unit distance based on the vertical distances from the reference operating point and the current operating point to the voltage limit line; and obtaining the electrical safety of the second switch tube based on the minimum value of the first per-unit distance, the second per-unit distance, the third per-unit distance and the fourth per-unit distance.

[0064] According to an embodiment of the present invention, the safe operating area of ​​the second switch tube is defined by the conduction voltage drop limit line, the current limit line, the pulse power limit line and the voltage limit line of the second switch tube. Specifically, the safe operating area can be an area surrounded by the horizontal axis representing the operating voltage, the vertical axis representing the operating current, the conduction voltage drop limit line, the current limit line, the pulse power limit line and the voltage limit line in a two-dimensional coordinate system.

[0065] According to an embodiment of the present invention, the first per-unit distance may be a ratio of a vertical distance from a current operating point to a conduction voltage drop limit line to a vertical distance from a reference operating point to a conduction voltage drop limit line.

[0066] According to an embodiment of the present invention, the second per-unit distance may be a ratio of a vertical distance from the current operating point to the current limiting line to a vertical distance from the reference operating point to the current limiting line.

[0067] According to an embodiment of the present invention, the third per-unit distance may be a ratio of a vertical distance from the current operating point to the pulse power limit line to a vertical distance from the reference operating point to the pulse power limit line.

[0068] According to an embodiment of the present invention, the fourth per-unit distance may be a ratio of a vertical distance from the current operating point to the voltage limit line to a vertical distance from the reference operating point to the voltage limit line.

[0069] According to an embodiment of the present invention, the process of determining the per-unit distance may be represented by the following formula (1):

[0070] (1)

[0071] in, It can represent the per-unit distance, It can represent the vertical distance from the current operating point to the limit line. It can represent the vertical distance from the reference operating point to the limit line. The limit line when k=1 can be the on-state voltage drop limit line, the limit line when k=2 can be the current limit line, the limit line when k=3 can be the pulse limit line, and the limit line when k=4 can be the voltage limit line.

[0072] According to an embodiment of the present invention, the electrical safety of the second switch tube may be the minimum value among the first per-unit distance, the second per-unit distance, the third per-unit distance, and the fourth per-unit distance. Specifically, the closer the current operating point is to the limit line, the smaller the value of the electrical safety of the second switch tube is, and the more likely it is to fail. Conversely, the farther the current operating point is from the limit line, the larger the value of the electrical safety of the second switch tube is, and the less likely it is to fail.

[0073] According to an embodiment of the present invention, the process of determining the electrical safety of the second switch tube can be shown as the following formula (2):

[0074] (2)

[0075] in, It can characterize the electrical safety of the second switch tube. It can represent the first per-unit distance, It can represent the second per unit distance, It can represent the third per unit distance, The fourth per-unit distance can be represented.

[0076] According to an embodiment of the present invention, the accuracy of the determined electrical safety is improved by determining the electrical safety of the second switch tube based on a safe operating area defined by a plurality of limit lines.

[0077] Figure 2A A schematic diagram of a safe operating area according to a specific embodiment of the present invention is shown.

[0078] like Figure 2A As shown in the figure, in the two-dimensional coordinate system where the horizontal axis represents voltage and the vertical axis represents current, the area SOA surrounded by the on-state voltage drop limit line I, the current limit line II, the pulse power limit line III, the voltage limit line IV, the horizontal axis and the vertical axis is the safe operating area. Specifically, the voltage can be the drain voltage (V DS ), the current can be the drain current (I D ).

[0079] According to an embodiment of the present invention, different pulse periods may correspond to different pulse power limit lines. Specifically, the pulse power limit line when the pulse period is 0.1 ms is different from the pulse power limit line when the pulse period is 1 ms.

[0080] Figure 2B A schematic diagram of determining a vertical distance according to a specific embodiment of the present invention is shown.

[0081] like Figure 2B As shown, the vertical distance from the reference operating point 201 to the on-state voltage drop limit line Ⅰ is D 1 The vertical distances from the current operating point 202 to the on-state voltage drop limit line Ⅰ, current limit line Ⅱ, pulse power limit line Ⅲ, and voltage limit line Ⅳ are d respectively. 1 ,d 2 ,d 3 ,d 4 .

[0082] According to an embodiment of the present invention, a secondary fault warning of a rectifier is performed based on the electrical safety of each of the multiple second switching tubes, including: determining the logical relationship between each of the multiple second switching tubes based on the topological structure of the rectifier; processing the electrical safety of each of the multiple second switching tubes based on the logical relationship between each of the multiple second switching tubes to obtain the reliability of the rectifier; and performing a secondary fault warning of the rectifier based on the reliability of the rectifier.

[0083] According to an embodiment of the present invention, the topological structure of the rectifier may include a logical relationship between various devices in the rectifier, and specifically, may include a logical relationship between each of a plurality of second switch tubes.

[0084] According to an embodiment of the present invention, the logical relationship can characterize the connection mode between the devices, and based on the logical relationship between the plurality of second switch tubes, processing the electrical safety of each of the plurality of second switch tubes can include: determining a calculation method corresponding to the logical relationship based on the connection mode between the plurality of second switch tubes. Specifically, the calculation method can include multiplication, taking the maximum value, etc.

[0085] According to an embodiment of the present invention, when determining the reliability of the rectifier, in addition to considering the electrical safety of each of the plurality of second switch tubes, the electrical safety of other devices in the rectifier may also be considered.

[0086] According to the embodiment of the present invention, a larger reliability value of the rectifier indicates a lower probability of a secondary failure of the rectifier, and conversely, a smaller reliability value of the rectifier indicates a larger probability of a secondary failure of the rectifier.

[0087] According to an embodiment of the present invention, a reliability threshold can be set to determine whether to issue a secondary fault warning. Specifically, when the reliability of the rectifier is less than the reliability threshold, it indicates that the probability of a secondary fault occurring in the rectifier is high, and a secondary fault warning of the rectifier is issued.

[0088] According to an embodiment of the present invention, by determining the reliability of the rectifier based on the logical relationship between the second switch tubes and performing a secondary fault warning based on the reliability, the accuracy of the determined reliability is improved, thereby improving the accuracy of the secondary fault warning.

[0089] According to an embodiment of the present invention, based on the logical relationship between each of the multiple second switching tubes, the electrical safety of each of the multiple second switching tubes is processed to obtain the reliability of the rectifier, including: based on the logical relationship between each of the multiple second switching tubes, the rectifier is divided into at least one series part, each series part includes at least one switching tube; based on the series relationship and parallel relationship between each of the at least one switching tube included in the series part, the electrical safety of each of the at least one switching tube included in the series part is processed to obtain the reliability of the series part; and based on the product of the reliabilities of each of the at least one series part, the reliability of the rectifier is obtained.

[0090] According to an embodiment of the present invention, the logical relationship between the plurality of second switch tubes includes a series relationship and a parallel relationship. The logical relationship between the plurality of series parts is a series relationship, and the logical relationship between at least one switch tube within the series part can be a series relationship or a parallel relationship.

[0091] According to an embodiment of the present invention, for at least one switch tube in a series connection whose logical relationship is a series connection, the reliability of the series connection can be determined based on the product of the electrical safety of the at least one switch tube. For at least one switch tube in a series connection whose logical relationship is a parallel connection, the reliability of the series connection can be determined based on the maximum value of the electrical safety of the at least one switch tube.

[0092] According to an embodiment of the present invention, the reliability of the rectifier is obtained by calculating the electrical safety of each of the plurality of second switch tubes based on the series-parallel logical relationship of the plurality of second switch tubes. Specifically, the reliability of the rectifier is the product of the reliabilities of the plurality of series parts, the series part may include a plurality of parallel branches, and the reliability of the series part is expressed as the maximum value of the reliabilities of the plurality of parallel branches.

[0093] For example, the structure of the rectifier is composed of a series connection of a series part A and a series connection of a series part B, the series part A includes a second switch tube a1 and a second switch tube a2 connected in series, and the series part B includes a second switch tube b1 and a second switch tube b2 connected in parallel. The reliability of the rectifier can be calculated by the following formula (3):

[0094] (3)

[0095] Where R is the reliability of the rectifier, can be the electrical safety of the second switch tube a1, can be the electrical safety of the second switch tube a2, can be the electrical safety of the second switch tube b1, It can be the electrical safety of the second switch tube b2.

[0096] According to an embodiment of the present invention, the reliability of the rectifier is determined by dividing the rectifier into at least one series part, and the reliability of each series part is determined based on the series-parallel relationship between at least one switch tube in the series part, thereby determining the reliability of the rectifier, thereby further improving the accuracy of the determined reliability of the rectifier.

[0097] According to an embodiment of the present invention, a secondary fault warning of a rectifier is performed based on the reliability of the rectifier, including: when the reliability of the rectifier is less than a reliability threshold, based on the electrical safety threshold and the electrical safety of each of the plurality of second switching tubes, determining at least one target switching tube from the plurality of second switching tubes; and based on the at least one target switching tube, generating warning feedback information to perform a secondary fault warning of the rectifier.

[0098] According to an embodiment of the present invention, the reliability threshold can be used as a reference for determining whether a rectifier will generate a secondary fault. When the reliability of the rectifier is less than the reliability threshold, it indicates that the possibility of the rectifier generating a secondary fault is high, and a secondary fault warning is required. When the reliability of the rectifier is not less than the reliability threshold, it indicates that the possibility of the rectifier generating a secondary fault is low, and a secondary fault warning is not required.

[0099] According to an embodiment of the present invention, when it is determined that the possibility of a secondary fault occurring in the rectifier is relatively high, a target switch tube that may fail may be determined from among a plurality of second switch tubes.

[0100] According to an embodiment of the present invention, the electrical safety threshold can be used as a reference for determining whether the second switch tube will fail. When the electrical safety of the second switch tube is less than the electrical safety threshold, the second switch tube is determined to be the target switch tube.

[0101] Table 1

[0102]

[0103] Table 1 shows the first switch After an open circuit failure occurs, the second switch , , , , The electrical safety of the second switch tube also changes accordingly. , Electrical safety The lowest, with a high probability of causing secondary failure, is the target switch tube that requires special attention.

[0104] According to an embodiment of the present invention, the early warning feedback information may include information about a target switch tube that may fail. Specifically, the early warning feedback information may be used to remind the target switch tube to be replaced. After the early warning feedback information is generated, the early warning feedback information may be sent to a terminal corresponding to the fault management personnel.

[0105] According to an embodiment of the present invention, by generating early warning feedback information based on target switch tubes that may cause secondary failures, preventive maintenance measures can be taken in advance according to the early warning feedback information, thereby reducing the cost of emergency repairs and replacement of parts.

[0106] According to an embodiment of the present invention, performing a secondary fault warning of a rectifier based on the reliability of the rectifier also includes: determining a reliability threshold of the rectifier based on electrical influencing factors, thermal influencing factors, mechanical stress influencing factors, operating environment influencing factors and product quality influencing factors of the rectifier.

[0107] According to an embodiment of the present invention, the reliability threshold of the rectifier can be determined based on the electrical influencing factors, thermal influencing factors, mechanical stress influencing factors, operating environment influencing factors and product quality influencing factors of each device in the rectifier. Specifically, in addition to the power switch tube, the devices in the rectifier can also include input filter inductors, rectifier diodes, power switch tube drivers, and DC side capacitors.

[0108] According to an embodiment of the present invention, the reliability threshold value may also be determined according to the number of devices in the rectifier. Specifically, the reliability threshold value of the rectifier may be determined according to the number of power switch tubes in the rectifier.

[0109] According to an embodiment of the present invention, the reliability threshold of the rectifier may also be determined through experiments, and the reliability threshold of the rectifier may be determined based on the reliability of the rectifier in a normal state and the reliability of the rectifier in a fault state.

[0110] According to the embodiment of the present invention, the reliability threshold of the rectifier is determined by considering multiple factors, so that the obtained reliability threshold can accurately reflect the reliability boundary of the rectifier, and further a more accurate secondary fault warning can be performed according to the reliability threshold.

[0111] Figure 3 A structural schematic diagram of a rectifier according to a specific embodiment of the present invention is shown.

[0112] like Figure 3 As shown, the rectifier may include an input filter inductor, a rectifier diode, a power switch tube, a power switch tube driver, and a DC side capacitor connected in sequence.

[0113] Figure 4 A block diagram of a rectifier secondary fault early warning device according to an embodiment of the present invention is shown.

[0114] like Figure 4 As shown, the rectifier secondary fault warning device includes an acquisition module 410 , a determination module 420 and a warning module 430 .

[0115] The acquisition module 410 is used to obtain current measurement data of each of the plurality of second switch tubes in response to a failure of a first switch tube among the plurality of switch tubes included in the rectifier, wherein the plurality of second switch tubes include switch tubes other than the first switch tube among the plurality of switch tubes. In one embodiment, the acquisition module 410 can be used to perform the operation S110 described above, which will not be described in detail here.

[0116] The determination module 420 is used to determine the electrical safety of each of the plurality of second switch tubes based on the respective reference measurement data and current measurement data of the plurality of second switch tubes. In one embodiment, the determination module 420 can be used to perform the operation S120 described above, which will not be described in detail here.

[0117] The early warning module 430 is used to perform a secondary fault early warning of the rectifier based on the electrical safety of each of the plurality of second switch tubes. In one embodiment, the early warning module 430 can be used to perform the operation S130 described above, which will not be described in detail here.

[0118] According to an embodiment of the present invention, the reference measurement data of the second switch tube includes a reference operating current and a reference operating voltage of the second switch tube, and the current measurement data of the second switch tube includes a current operating current and a current operating voltage of the second switch tube.

[0119] According to an embodiment of the present invention, the determination module 420 includes a reference determination submodule, a current determination submodule, and a safety level determination submodule.

[0120] The reference determination submodule is used to obtain a reference operating point of each second switch tube based on a reference operating current and a reference operating voltage of the second switch tube.

[0121] The current determination submodule is used to obtain the current operating point of the second switch tube based on the current operating current and the current operating voltage of the second switch tube.

[0122] The safety determination submodule is used to obtain the electrical safety of the second switch tube based on the positions of the reference operating point and the current operating point in the safe operating area of ​​the second switch tube, wherein the safe operating area of ​​the second switch tube is determined based on the electrical limit parameters of the second switch tube, and the electrical limit parameters include the peak current, breakdown voltage and pulse power consumption of the power switch tube.

[0123] According to an embodiment of the present invention, the safe operating area of ​​the second switch tube is defined by the on-state voltage drop limiting line, the current limiting line, the pulse power limiting line and the voltage limiting line of the second switch tube.

[0124] According to an embodiment of the present invention, the safety degree determination submodule includes a first determination unit, a geothermal determination unit, a third determination unit, a fourth determination unit and a safety degree determination unit.

[0125] The first determining unit is used to obtain a first per-unit distance based on the vertical distances from the reference operating point and the current operating point to the on-state voltage drop limit line.

[0126] The second determining unit is used to obtain a second per-unit distance based on the vertical distances from the reference operating point and the current operating point to the current limiting line.

[0127] The third determining unit is used to obtain a third per-unit distance based on the vertical distances of the reference operating point and the current operating point from the pulse power limit line.

[0128] The fourth determining unit is used to obtain a fourth per-unit distance based on the vertical distances from the reference operating point and the current operating point to the voltage limit line.

[0129] The safety degree determination unit is used to obtain the electrical safety degree of the second switch tube based on the minimum value of the first per-unit distance, the second per-unit distance, the third per-unit distance and the fourth per-unit distance.

[0130] According to an embodiment of the present invention, the early warning module 430 includes a logic determination submodule, a reliability determination submodule and an early warning submodule.

[0131] The logic determination submodule is used to determine the logic relationship between the plurality of second switch tubes based on the topological structure of the rectifier.

[0132] The reliability determination submodule is used to process the electrical safety of each of the plurality of second switch tubes based on the logical relationship between each of the plurality of second switch tubes to obtain the reliability of the rectifier.

[0133] The early warning submodule is used to provide a secondary fault early warning for the rectifier based on the reliability of the rectifier.

[0134] According to an embodiment of the present invention, the logical relationship between the plurality of second switch tubes includes a series relationship and a parallel relationship.

[0135] According to an embodiment of the present invention, the reliability determination submodule includes a dividing unit, a first reliability determination unit and a second reliability determination unit.

[0136] The dividing unit is used to divide the rectifier into at least one series part based on the logical relationship between the plurality of second switch tubes, each of which includes at least one switch tube.

[0137] The first reliability determination unit is used to process the electrical safety of at least one switching tube included in the series part based on the series relationship and parallel relationship between each of the at least one switching tube included in the series part to obtain the reliability of the series part.

[0138] The second reliability determination unit is used to obtain the reliability of the rectifier based on the product of the respective reliabilities of at least one series connection part.

[0139] According to an embodiment of the present invention, the early warning submodule includes a target determination unit and an information generation unit.

[0140] The target determination unit is used to determine at least one target switch tube from the plurality of second switch tubes based on the electrical safety threshold and the electrical safety of each of the plurality of second switch tubes when the reliability of the rectifier is less than the reliability threshold.

[0141] The information generating unit is used to generate early warning feedback information based on at least one target switch tube to perform secondary fault early warning of the rectifier.

[0142] According to an embodiment of the present invention, the early warning submodule further includes a threshold determination unit.

[0143] The threshold determination unit is used to determine the reliability threshold of the rectifier based on the electrical influencing factors, thermal influencing factors, mechanical stress influencing factors, operating environment influencing factors and product quality influencing factors of the rectifier.

[0144] According to the embodiments of the present invention, any one or more of the modules, submodules, units, and subunits, or at least part of the functions of any one of them can be implemented in one module. According to the embodiments of the present invention, any one or more of the modules, submodules, units, and subunits can be split into multiple modules for implementation. According to the embodiments of the present invention, any one or more of the modules, submodules, units, and subunits can be at least partially implemented as hardware circuits, such as field programmable gate arrays (FPGAs), programmable logic arrays (PLAs), systems on chips, systems on substrates, systems on packages, application specific integrated circuits (ASICs), or can be implemented by hardware or firmware in any other reasonable way of integrating or packaging the circuit, or by any one of the three implementation methods of software, hardware, and firmware, or by a proper combination of any of them. Alternatively, according to the embodiments of the present invention, one or more of the modules, submodules, units, and subunits can be at least partially implemented as computer program modules, and when the computer program modules are run, the corresponding functions can be executed.

[0145] For example, any multiple of the acquisition module 410, the determination module 420, and the early warning module 430 can be combined in one module / unit / sub-unit for implementation, or any one of the modules / units / sub-units can be split into multiple modules / units / sub-units. Alternatively, at least part of the functions of one or more of these modules / units / sub-units can be combined with at least part of the functions of other modules / units / sub-units and implemented in one module / unit / sub-unit. According to an embodiment of the present invention, at least one of the acquisition module 410, the determination module 420, and the early warning module 430 can be at least partially implemented as a hardware circuit, such as a field programmable gate array (FPGA), a programmable logic array (PLA), a system on a chip, a system on a substrate, a system on a package, an application specific integrated circuit (ASIC), or can be implemented by hardware or firmware such as any other reasonable way of integrating or packaging the circuit, or implemented in any one of the three implementation methods of software, hardware, and firmware or in a suitable combination of any of them. Alternatively, at least one of the acquisition module 410, the determination module 420, and the warning module 430 may be at least partially implemented as a computer program module, and when the computer program module is executed, the corresponding function may be executed.

[0146] It should be noted that the rectifier secondary fault warning device part in the embodiment of the present invention corresponds to the rectifier secondary fault warning method part in the embodiment of the present invention. The description of the rectifier secondary fault warning device part specifically refers to the rectifier secondary fault warning method part, which will not be repeated here.

[0147] Figure 5 A block diagram of an electronic device suitable for implementing a rectifier secondary fault early warning method according to an embodiment of the present invention is shown. Figure 5 The electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0148] like Figure 5 As shown, the electronic device according to an embodiment of the present invention includes a processor 501, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 502 or a program loaded from a storage part 508 to a random access memory (RAM) 503. The processor 501 may include, for example, a general-purpose microprocessor (e.g., a CPU), an instruction set processor and / or a related chipset and / or a special-purpose microprocessor (e.g., an application-specific integrated circuit (ASIC)), etc. The processor 501 may also include an onboard memory for caching purposes. The processor 501 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present invention.

[0149] In RAM 503, various programs and data required for the operation of the electronic device are stored. The processor 501, ROM 502 and RAM 503 are connected to each other via a bus 504. The processor 501 performs various operations of the method flow according to the embodiment of the present invention by executing the programs in ROM 502 and / or RAM 503. It should be noted that the program can also be stored in one or more memories other than ROM 502 and RAM 503. The processor 501 can also perform various operations of the method flow according to the embodiment of the present invention by executing the programs stored in one or more memories.

[0150] According to an embodiment of the present invention, the electronic device may further include an input / output (I / O) interface 505, which is also connected to the bus 504. The electronic device may further include one or more of the following components connected to the input / output (I / O) interface 505: an input portion 506 including a keyboard, a mouse, etc.; an output portion 507 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage portion 508 including a hard disk, etc.; and a communication portion 509 including a network interface card such as a LAN card, a modem, etc. The communication portion 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the input / output (I / O) interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as needed, so that a computer program read therefrom is installed into the storage portion 508 as needed.

[0151] According to an embodiment of the present invention, the method flow according to an embodiment of the present invention can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program carried on a computer-readable storage medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 509, and / or installed from the removable medium 511. When the computer program is executed by the processor 501, the above-mentioned functions defined in the system of the embodiment of the present invention are executed. According to an embodiment of the present invention, the system, equipment, device, module, unit, etc. described above can be implemented by a computer program module.

[0152] The present invention also provides a computer-readable storage medium, which may be included in the device / apparatus / system described in the above embodiment; or may exist independently without being assembled into the device / apparatus / system. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to the embodiment of the present invention is implemented.

[0153] According to an embodiment of the present invention, the computer-readable storage medium may be a non-volatile computer-readable storage medium. For example, it may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, an apparatus or a device.

[0154] For example, according to an embodiment of the present invention, the computer-readable storage medium may include the ROM 502 and / or the RAM 503 described above and / or one or more memories other than the ROM 502 and the RAM 503 .

[0155] An embodiment of the present invention also includes a computer program product, which includes a computer program, which contains program code for executing the method provided by the embodiment of the present invention. When the computer program product runs on an electronic device, the program code is used to enable the electronic device to implement the rectifier secondary fault warning method provided by the embodiment of the present invention.

[0156] When the computer program is executed by the processor 501, the above functions defined in the system / device of the embodiment of the present invention are executed. According to the embodiment of the present invention, the system, device, module, unit, etc. described above can be implemented by a computer program module.

[0157] In one embodiment, the computer program may rely on tangible storage media such as optical storage devices, magnetic storage devices, etc. In another embodiment, the computer program may also be transmitted and distributed in the form of signals on a network medium, and downloaded and installed through the communication part 509, and / or installed from the removable medium 511. The program code contained in the computer program may be transmitted using any appropriate network medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0158] According to an embodiment of the present invention, the program code for executing the computer program provided by the embodiment of the present invention can be written in any combination of one or more programming languages. Specifically, these computing programs can be implemented using high-level process and / or object-oriented programming languages, and / or assembly / machine languages. Programming languages ​​include, but are not limited to, Java, C++, python, "C" language or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, partially on the remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0159] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present invention. In this regard, each box in the flowchart or block diagram may represent a module, a program segment, or a part of a code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box may also occur in an order different from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions. It can be understood by those skilled in the art that the features recorded in the various embodiments of the present invention can be combined and / or combined in various ways, even if such a combination or combination is not explicitly recorded in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features recorded in the various embodiments of the present invention can be combined and / or combined in various ways. All these combinations and / or combinations fall within the scope of the present invention.

[0160] The embodiments of the present invention are described above. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Although each embodiment is described above, it does not mean that the measures in each embodiment cannot be used in combination advantageously. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A rectifier secondary fault early warning method, It is characterized in that The method comprises: In response to a failure of a first switch tube among a plurality of switch tubes included in the rectifier, obtaining current measurement data of each of a plurality of second switch tubes, wherein the plurality of second switch tubes include switch tubes among the plurality of switch tubes except the first switch tube; Determining the electrical safety of each of the plurality of second switch tubes based on the respective reference measurement data and the current measurement data of the plurality of second switch tubes; Based on the electrical safety of each of the plurality of second switch tubes, a secondary fault warning of the rectifier is performed.

2. The method according to claim 1, It is characterized in that The reference measurement data of the second switch tube includes a reference operating current and a reference operating voltage of the second switch tube, and the current measurement data of the second switch tube includes a current operating current and a current operating voltage of the second switch tube; Characterized in that, determining the electrical safety of each of the plurality of second switch tubes based on the respective reference measurement data and current measurement data of the plurality of second switch tubes comprises: For each second switch tube, obtaining a reference operating point of the second switch tube based on a reference operating current and a reference operating voltage of the second switch tube; Obtaining a current operating point of the second switch tube based on a current operating current and a current operating voltage of the second switch tube; Based on the positions of the reference operating point and the current operating point in the safe operating area of ​​the second switch tube, the electrical safety of the second switch tube is obtained, wherein the safe operating area of ​​the second switch tube is determined based on the electrical limit parameters of the second switch tube, and the electrical limit parameters include the power switch tube peak current, breakdown voltage and pulse power consumption.

3. The method according to claim 2, It is characterized in that The safe operating area of ​​the second switch tube is defined by a conduction voltage drop limit line, a current limit line, a pulse power limit line and a voltage limit line of the second switch tube; Characterized in that, obtaining the electrical safety of the second switch tube based on the positions of the reference operating point and the current operating point in the safe operating area of ​​the second switch tube comprises: Obtaining a first per-unit distance based on the vertical distances from the reference operating point and the current operating point to the on-state voltage drop limit line; Obtaining a second per-unit distance based on the vertical distances from the reference operating point and the current operating point to the current limiting line; Obtaining a third per-unit distance based on the vertical distances of the reference operating point and the current operating point from each of the pulse power limit line; Obtaining a fourth per-unit distance based on the vertical distances from the reference operating point and the current operating point to the voltage limit line; The electrical safety of the second switch tube is obtained based on the minimum value among the first per-unit distance, the second per-unit distance, the third per-unit distance and the fourth per-unit distance.

4. The method according to claim 1, It is characterized in that The performing of a secondary fault warning of the rectifier based on the electrical safety of each of the plurality of second switch tubes includes: Based on the topological structure of the rectifier, determining the logical relationship between the plurality of second switch tubes; Based on the logical relationship between the plurality of second switch tubes, the electrical safety of each of the plurality of second switch tubes is processed to obtain the reliability of the rectifier; A secondary fault warning of the rectifier is performed based on the reliability of the rectifier.

5. The method according to claim 4, It is characterized in that The logical relationship between the plurality of second switch tubes includes a series relationship and a parallel relationship; It is characterized in that, based on the logical relationship between the plurality of second switch tubes, the electrical safety of each of the plurality of second switch tubes is processed to obtain the reliability of the rectifier, including: Based on the logical relationship between the plurality of second switch tubes, the rectifier is divided into at least one series part, each of the series parts includes at least one switch tube; Based on the series relationship and the parallel relationship between the at least one switch tube included in the series part, the electrical safety of each of the at least one switch tube included in the series part is processed to obtain the reliability of the series part; The reliability of the rectifier is obtained based on the product of the respective reliabilities of the at least one series part.

6. The method according to claim 4, It is characterized in that The performing of a secondary fault warning of the rectifier based on the reliability of the rectifier includes: When the reliability of the rectifier is less than a reliability threshold, determining at least one target switch tube from the plurality of second switch tubes based on an electrical safety threshold and the electrical safety of each of the plurality of second switch tubes; Based on the at least one target switch tube, early warning feedback information is generated to perform a secondary fault early warning of the rectifier.

7. The method according to claim 6, It is characterized in that The method further comprises: A reliability threshold of the rectifier is determined based on electrical influencing factors, thermal influencing factors, mechanical stress influencing factors, operating environment influencing factors and product quality influencing factors of the rectifier.

8. A rectifier secondary fault warning device, It is characterized in that The device comprises: an acquisition module, configured to acquire current measurement data of each of a plurality of second switch tubes in response to a failure of a first switch tube among a plurality of switch tubes included in the rectifier, wherein the plurality of second switch tubes include switch tubes among the plurality of switch tubes except the first switch tube; A determination module, configured to determine the electrical safety of each of the plurality of second switch tubes based on the respective reference measurement data and current measurement data of the plurality of second switch tubes; The early warning module is used to provide a secondary fault early warning for the rectifier based on the electrical safety of each of the plurality of second switch tubes.

9. An electronic device, include: one or more processors; a memory for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having executable instructions stored thereon, which, when executed by a processor, enables the processor to implement the method according to any one of claims 1 to 7.

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