Method and apparatus for fault diagnosis of circuit breaker, device, and medium

Abstract

The embodiment of the invention provides a circuit breaker fault diagnosis method and device, equipment and a medium. The method comprises the following steps: acquiring alarm information of a preset time period of a target plant station; screening opening command outlet information, closing command outlet information, switch opening action information and switch closing action information according to preset circuit breaker operation keywords; for each circuit breaker, obtaining the opening time of the circuit breaker according to at least one group of adjacent protection action time and switch action time corresponding to the circuit breaker; obtaining the closing time of the circuit breaker according to at least one group of adjacent protection action time and switch action time corresponding to the circuit breaker; and for each circuit breaker, determining whether the circuit breaker has a slow opening fault and / or a slow closing fault according to the opening time and the closing time of the circuit breaker. The method achieves the effect of guaranteeing the power supply stability of the power system.

Description

(19) State Intellectual Property Office (12) Invention Patent Application (10) Application Publication Number (43) Application Publication Date (21) Application Number 202610044006.1 (22) Application Date 2026.01.13 (71) Applicant Guangdong Power Grid Co., Ltd. Meizhou Power Supply Bureau Address 514000 No. 48, Binfang Avenue, Meizhou City, Guangdong Province Applicant Guangdong Power Grid Co., Ltd. (72) Inventors Huang Zifeng, Qiu Fu, Deng Zhixiong, Yang Ziran, Liao Wenbiao, Li Zengchang, Jin Hongzhe, Fu Yihong (74) Patent Agency Beijing Tongli Juncheng Intellectual Property Agency Co., Ltd. 11205 Patent Attorney Zhou Hui (51) Int.Cl. G01R 31 / 327 (2006.01) (54) Invention Title Fault Diagnosis Method, Device, Equipment and Medium for Circuit Breaker (57) Abstract This application provides a fault diagnosis method, device, equipment and medium for circuit breaker. The method includes: acquiring alarm information from a target power plant within a preset time period; filtering tripping command output information, closing command output information, switch tripping action information, and switch closing action information based on preset circuit breaker operation keywords; for each circuit breaker, obtaining the tripping time based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker; obtaining the closing time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker; and for each circuit breaker, determining whether a slow tripping fault and / or slow closing fault exists based on the circuit breaker's tripping and closing times. This method achieves the effect of ensuring the power supply stability of the power system. Claims (2 pages), Description (12 pages), Drawings (3 pages), CN 121899631 A, 2026.04.21, CN 1 21 89 96 31 A. 1. A fault diagnosis method for a circuit breaker, characterized in that it includes: acquiring alarm information from a target substation within a preset time period; filtering out tripping command output information, closing command output information, switch tripping action information, and switch closing action information from the alarm information based on preset keywords for circuit breaker operation; for each circuit breaker, acquiring the tripping time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker, wherein the tripping command output information includes the protection action time corresponding to the tripping of each circuit breaker, and the switch tripping action information includes the switch action time corresponding to the tripping of each circuit breaker; acquiring the closing time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker, wherein the closing command output information includes the protection action time corresponding to the closing of each circuit breaker. The switch closing action information includes the switch action time corresponding to the closing of each circuit breaker.For each circuit breaker, based on the opening and closing times of the circuit breaker, determine whether the circuit breaker has a slow opening fault and / or a slow closing fault; wherein, the protection action time within each time period is earlier than the switch action time. 2. The method according to claim 1, wherein determining whether the circuit breaker has a slow opening fault and / or a slow closing fault based on the opening and closing times of the circuit breaker includes: if the opening time of the circuit breaker is greater than a preset opening standard time, then determine that the circuit breaker has a slow opening fault; and / or, if the closing time of the circuit breaker is greater than a preset closing standard time, then determine that the circuit breaker has a slow closing fault. 3. The method according to claim 1 or 2, wherein obtaining the alarm information of the target plant within a preset time period includes: simulating manual operation by logging into the event sequence recording system through simulation software, and crawling the alarm information of all equipment or all circuit breaker equipment of the target plant within the preset time period. 4. The method according to claim 1 or 2, wherein the keywords of the circuit breaker operation include: protection action, three-phase single reclosing, reclosing action, switch open position closing, and switch closed position opening. 5. The method according to claim 1 or 2, wherein obtaining the circuit breaker's opening time based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker includes: sorting the opening command output information and the switch opening action information according to the time sequence of event reporting; obtaining at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker based on the sorted opening command output information and switch opening action information; and calculating the average time difference between each set of time-adjacent protection action times and switch action times to obtain the circuit breaker's opening time. 6. The method according to claim 1 or 2, characterized in that, obtaining the closing time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker includes: sorting the closing command output information and the switch closing action information according to the time order of event reporting; obtaining at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker based on the sorted closing command output information and switch closing action information; calculating the average value of the time difference between each set of time-adjacent protection action times and switch action times to obtain the closing time of the circuit breaker as described in claim 1 / 2 page 2 CN 121899631 A. 7. The method according to claim 5, characterized in that, obtaining at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker based on the sorted opening command output information and switch opening action information includes:Based on the sorted tripping command output information and switch tripping action information, at least one set of tripping command events and switch tripping action events with adjacent reporting times corresponding to the circuit breaker are obtained; for each set of events, the reporting time of the tripping command event is taken as the protection action time of this set of events, and the reporting time of the switch tripping action event is taken as the switch action time of this set of events. 8. The method according to claim 6, wherein obtaining at least one set of protection action time and switch action time with adjacent reporting times corresponding to the circuit breaker based on the sorted closing command output information and switch closing action information includes: obtaining at least one set of closing command events and switch closing action events with adjacent reporting times corresponding to the circuit breaker based on the sorted closing command output information and switch closing action information; for each set of events, the reporting time of the closing command event is taken as the protection action time of this set of events, and the reporting time of the switch closing action event is taken as the switch action time of this set of events. 9. The method according to any one of claims 1, 2, 7 or 8, characterized in that the method further comprises: if it is determined that the circuit breaker has a slow opening fault and / or a slow closing fault, then pushing alarm information to a target terminal, the alarm information being used to indicate that the circuit breaker has a slow opening fault and / or a slow closing fault. 10. A fault diagnosis device for a circuit breaker, characterized in that it comprises: an acquisition unit, configured to acquire alarm information of a target plant within a preset time period; a filtering unit, configured to filter out tripping command output information, closing command output information, switch tripping action information, and switch closing action information from the alarm information according to preset keywords for circuit breaker operation; a first processing unit, configured to acquire the tripping time of each circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker, wherein the tripping command output information includes the protection action time corresponding to the tripping of each circuit breaker, and the switch tripping action information includes the switch action time corresponding to the tripping of each circuit breaker; and a second processing unit, configured to acquire the closing time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker, wherein the closing command output information includes the protection action time corresponding to the closing of each circuit breaker, and the switch closing action information includes the switch action time corresponding to the closing of each circuit breaker. A determining unit is configured to, for each circuit breaker, determine whether a slow-opening fault and / or slow-closing fault exists in the circuit breaker based on the opening and closing times of the circuit breaker; wherein the protection action time in each time period is earlier than the switch action time. 11. A computer device, characterized in that it comprises: a memory and a processor; the memory stores computer execution instructions;The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-9. 12. A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer execution instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-9. Claims 2 / 2 pages 3 CN 121899631 A Fault diagnosis method, apparatus, device and medium for circuit breakers Technical Field

[0001] This application relates to the field of power systems, and more particularly to a fault diagnosis method, apparatus, device and medium for circuit breakers. Background Art

[0002] Currently, many 10kV circuit breakers in substations have been in operation for a long time but have not reached the age for comprehensive renovation and replacement. This results in these circuit breakers generally experiencing longer opening and closing times than required by regulations due to aging of the circuit breaker mechanism's tripping coil, jamming of the switch mechanism's mechanical parts, and poor contact in the secondary circuit. This not only leads to circuit breaker tripping events at the main transformer and 10kV section connected to the circuit breaker, causing 10kV busbar voltage loss, load loss, and unstable power supply, but may even pose a risk of circuit breaker explosion due to the long arc-extinguishing time.

[0003] In the prior art, the judgment is often made based on protection information collected by operating personnel at the fault site after a circuit breaker tripping event. However, the existing methods have the problems of difficulty in troubleshooting and long time required for busbar restoration.

[0004] Therefore, there is an urgent need for a method to diagnose slow opening / slow closing faults of circuit breakers in advance, so as to effectively avoid the adverse consequences caused by the slow opening and / or closing time of circuit breakers. Summary of the Invention

[0005] This application provides a fault diagnosis method, device, equipment, and medium for circuit breakers, which can diagnose faults of circuit breakers in advance, effectively avoid the adverse consequences caused by slow opening or slow closing of circuit breakers, and achieve the effect of ensuring the power supply stability of the power system.

[0006] In a first aspect, embodiments of this application provide a fault diagnosis method for a circuit breaker, comprising:

[0007] acquiring alarm information of a target substation within a preset time period;

[0008] filtering out tripping command output information, closing command output information, switch tripping action information, and switch closing action information from the alarm information according to preset keywords for circuit breaker operation;

[0009] for each circuit breaker, acquiring the tripping time of the circuit breaker according to at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker, wherein the tripping command output information includes the protection action time corresponding to the tripping of each circuit breaker, and the switch tripping action information includes the switch action time corresponding to the tripping of each circuit breaker;

[0010] Based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker, the closing time of the circuit breaker is obtained. The closing command output information includes the protection action time corresponding to the closing of each circuit breaker, and the switch closing action information includes the switch action time corresponding to the closing of each circuit breaker;

[0011] For each circuit breaker, based on the opening time and closing time of the circuit breaker, it is determined whether the circuit breaker has a slow opening fault and / or a slow closing fault;

[0012] Wherein, the protection action time in each time set is earlier than the switch action time.

[0013] In one possible implementation, determining whether the circuit breaker has a slow opening fault and / or slow closing fault based on the opening and closing time of the circuit breaker includes:

[0014] If the opening time of the circuit breaker is greater than a preset opening standard time, then it is determined that the circuit breaker has a slow opening fault;

[0015] and / or,

[0016] If the closing time of the circuit breaker is greater than a preset closing standard time, then it is determined that the circuit breaker has a slow closing fault.

[0017] In one possible implementation, obtaining the alarm information of the target plant within a preset time period includes:

[0018] Using simulation software to simulate manual operation and log into the event sequence recording system, crawling the alarm information of all equipment or all circuit breaker equipment of the target plant within the preset time period.

[0019] In one possible implementation, the keywords for the circuit breaker operation include: protection action, three-phase single reclosing, reclosing action, switch open position closing, and switch closed position opening.

[0020] In one possible implementation, obtaining the circuit breaker's opening time based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker includes:

[0021] sorting the opening command output information and the opening action information according to the time order of event reporting;

[0022] obtaining at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker based on the sorted opening command output information and switch opening action information;

[0023] calculating the average time difference between each set of time-adjacent protection action times and switch action times to obtain the circuit breaker's opening time.

[0024] In one possible implementation, obtaining the closing time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker includes:

[0025] sorting the closing command output information and the switch closing action information according to the time order of event reporting;

[0026] obtaining the closing time of the circuit breaker corresponding to the circuit breaker based on the sorted closing command output information and switch closing action information.At least one set of time-adjacent protection action times and switch action times;

[0027] Calculate the average time difference between each set of time-adjacent protection action times and switch action times to obtain the closing time of the circuit breaker.

[0028] In one possible implementation, obtaining at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker based on the sorted tripping command output information and switch tripping action information includes:

[0029] Obtaining at least one set of time-adjacent tripping command events and switch tripping action events corresponding to the circuit breaker based on the sorted tripping command output information and switch tripping action information;

[0030] For each set of events, the reporting time of the tripping command event is taken as the protection action time of the set of events, and the reporting time of the switch tripping action event is taken as the switch action time of the set of events.

[0031] In one possible implementation, the step of obtaining at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker based on the sorted closing command output information and switch closing action information includes:

[0032] Obtaining at least one set of time-adjacent closing command events and switch closing action events corresponding to the circuit breaker based on the sorted closing command output information and switch closing action information;

[0033] For each set of events, the reporting time of the closing command event is taken as the protection action time of the set of events, and the reporting time of the switch closing action event is taken as the switch action time of the set of events. Specification 2 / 12 Page 5 CN 121899631 A

[0034] In one possible implementation, the method further includes:

[0035] If it is determined that the circuit breaker has a slow opening fault and / or a slow closing fault, then an alarm message is pushed to the target terminal, the alarm message being used to indicate that the circuit breaker has a slow opening fault and / or a slow closing fault.

[0036] In a second aspect, embodiments of this application provide a fault diagnosis device for a circuit breaker, comprising:

[0037] an acquisition unit, configured to acquire alarm information of a target substation within a preset time period;

[0038] a filtering unit, configured to filter out tripping command output information, closing command output information, switch tripping action information, and switch closing action information from the alarm information based on preset keywords for circuit breaker operation;

[0039] a first processing unit, configured to, for each circuit breaker, acquire the tripping time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker, wherein the tripping command output information includes the protection action time corresponding to the tripping of each circuit breaker, and the switch tripping action information includes the switch action time corresponding to the tripping of each circuit breaker;

[0040] The second processing unit is used to obtain the closing time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker. The closing command output information includes the protection action time corresponding to the closing of each circuit breaker, and the switch closing action information includes the switch action time corresponding to the closing of each circuit breaker.

[0041] The determining unit is used to determine whether the circuit breaker has a slow opening fault and / or a slow closing fault for each circuit breaker based on the opening time and closing time of the circuit breaker.

[0042] Wherein, the protection action time in each time set is earlier than the switch action time.

[0043] In one possible implementation, the determining unit is specifically used to:

[0044] If the opening time of the circuit breaker is greater than a preset opening standard time, then determine that the circuit breaker has a slow opening fault;

[0045] and / or,

[0046] If the closing time of the circuit breaker is greater than a preset closing standard time, then determine that the circuit breaker has a slow closing fault.

[0047] In one possible implementation, the acquisition unit is specifically used for:

[0048] simulating manual operation by logging into the event sequence recording system using simulation software, and crawling alarm information of all equipment or all circuit breaker equipment of the target plant within a preset time period.

[0049] In one possible implementation, the keywords of circuit breaker operation in the filtering unit include: protection action, three-phase single reclosing, reclosing action, switch open position closing, and switch closed position opening.

[0050] In one possible implementation, the first processing unit includes:

[0051] a first sorting module, used to sort the tripping command output information and the switch tripping action information according to the time order of event reporting;

[0052] a first acquisition module, used to acquire at least one set of time-adjacent protection action time and switch action time corresponding to the circuit breaker based on the sorted tripping command output information and switch tripping action information;

[0053] a second acquisition module, used to calculate the average value of the time difference between each set of time-adjacent protection action time and switch action time to obtain the tripping time of the circuit breaker.

[0054] In one possible implementation, the second processing unit includes:

[0055] a second sorting module, configured to sort the closing command output information and the switch closing action information according to the time order of event reporting;

[0056] a third acquisition module, configured to acquire at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker based on the sorted closing command output information and switch closing action information;

[0057] a fourth acquisition module, configured to calculate the time interval between each set of time-adjacent protection action times and switch action times.The average value of the interval difference is used to obtain the closing time of the circuit breaker.

[0058] In one possible implementation, the first acquisition module is specifically used to:

[0059] According to the sorted tripping command output information and switch tripping action information, acquire at least one set of tripping command events and switch tripping action events with adjacent reporting times corresponding to the circuit breaker;

[0060] For each set of events, the reporting time of the tripping command event is used as the protection action time of the set of events, and the reporting time of the switch tripping action event is used as the switch action time of the set of events.

[0061] In one possible implementation, the third acquisition module is specifically used to:

[0062] According to the sorted closing command output information and switch closing action information, acquire at least one set of closing command events and switch closing action events with adjacent reporting times corresponding to the circuit breaker;

[0063] For each set of events, the reporting time of the closing command event is used as the protection action time of the set of events, and the reporting time of the switch closing action event is used as the switch action time of the set of events.

[0064] In one possible embodiment, the fault diagnosis device for the circuit breaker further includes:

[0065] an alarm unit, configured to push alarm information to a target terminal if it is determined that the circuit breaker has a slow opening fault and / or a slow closing fault, the alarm information being used to indicate that the circuit breaker has a slow opening fault and / or a slow closing fault.

[0066] In a third aspect, embodiments of this application provide a computing device, including: a memory and a processor;

[0067] the memory stores computer execution instructions;

[0068] the processor executes the computer execution instructions stored in the memory, causing the processor to execute the first aspect and / or various possible implementations of the first aspect as described above.

[0069] In a fourth aspect, embodiments of this application provide a computer-readable storage medium, the computer-readable storage medium storing computer execution instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect as described above.

[0070] In a fifth aspect, embodiments of this application provide a computer program product, including a computer program, which, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect as described above.

[0071] The fault diagnosis method, apparatus, equipment, and medium for circuit breakers provided in this application embodiment acquire alarm information from the target substation within a preset time period, and filter out tripping command output information, closing command output information, switch tripping action information, and switch closing action information based on preset keywords for circuit breaker operation. Then, for each circuit breaker, based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker, the tripping of the circuit breaker is obtained.The closing time of the circuit breaker is obtained based on at least one set of adjacent protection action times and switch action times corresponding to the circuit breaker. Finally, for each circuit breaker, the means of determining whether the circuit breaker has a slow opening fault and / or slow closing fault are determined based on the opening time and closing time of the circuit breaker. Fault diagnosis of the circuit breaker is performed in advance, so that when a slow opening fault and / or slow closing fault is diagnosed in the circuit breaker, the operation and maintenance personnel can maintain the circuit breaker in a timely manner, thereby effectively avoiding the adverse consequences caused by the slow opening or slow closing of the circuit breaker, and ultimately achieving the effect of ensuring the power supply stability of the power system. Brief Description of the Drawings

[0072] The accompanying drawings are incorporated in and constitute a part of this specification, illustrating embodiments consistent with this application, and together with the description are used to explain the principles of this application. Specification 4 / 12 pages 7 CN 121899631 A

[0073] Figure 1 is a flowchart illustrating a fault diagnosis method for a circuit breaker provided in Embodiment 1 of this application;

[0074] Figure 2 is a flowchart illustrating a specific fault diagnosis method for a circuit breaker provided in Embodiment 2 of this application;

[0075] Figure 3 is a structural schematic diagram illustrating a fault diagnosis device for a circuit breaker provided in Embodiment 3 of this application;

[0076] Figure 4 is a structural schematic diagram illustrating a fault diagnosis device for a circuit breaker provided in Embodiment 4 of this application;

[0077] Figure 5 is a structural schematic diagram illustrating a computer device provided in this application.

[0078] The above figures illustrate specific embodiments of this application, which will be described in more detail below. These figures and descriptions are not intended to limit the scope of the concept of this application in any way, but rather to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. Detailed Description

[0079] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0080] First, the terms involved in this application are explained:

[0081] Sequence of Events (SOE) system: The SOE system is mainly used to record the process or flow of a series of events occurring in chronological order. Especially when power equipment fails or malfunctions, it can accurately record the precise time of multiple switch input signal changes and analyze the order of each event change with millisecond-level resolution. It is an important system used by China Southern Power Grid Co., Ltd. to record and summarize relevant equipment information. The information recorded in the SOE system includes various alarm information of all substations under China Southern Power Grid throughout the day, and these alarm information are numbered by equipment number.The event reporting time is summarized.

[0082] Selenium: Selenium is a toolset for automated testing of web applications. It can run directly in the browser to simulate the actual operation of the user. Since Selenium supports multiple browsers, including IE, Firefox, Chrome and Safari, and also supports multiple programming languages, such as Python, Java, C#, etc., it has become the preferred tool for functional test automation.

[0083] In order to facilitate understanding of the technical solutions in this application, the background technology is described in detail below:

[0084] According to the maintenance and repair regulations of China Southern Power Grid Company, the inspection time requirement for 10kV circuit breakers is: a new circuit breaker shall be inspected once within one year of commissioning, and then every 3 years thereafter. The long inspection cycle has resulted in many substations having 10kV circuit breakers that have been in operation for a long time but have not yet reached the age for comprehensive renovation and replacement. Consequently, these circuit breaker mechanisms generally suffer from problems such as aging of the trip coil, jamming of the mechanical parts of the switch mechanism, and poor contact in the secondary circuit, resulting in switch opening and closing times that exceed the specified requirements for circuit breaker opening and closing times.

[0085] Currently, due to the high frequency of 10kV line fault trips, the substation industry has experienced multiple incidents of slow opening of 10kV line circuit breakers, leading to protection overshooting and resulting in tripping of the main transformer and 10kV sectionalizing switch connected to the circuit breaker. These incidents directly cause 10kV busbar voltage loss, load loss, and power supply instability. In addition, if the circuit breaker opens slowly, there is even a risk of circuit breaker explosion due to the long arc extinguishing time. It is known that after inspecting the faulty switches, it was found that the circuit breaker tripping time was much greater than the standard requirement of 100ms, and the tripping time of some circuit breakers even reached more than 600ms.

[0086] Since most substations currently adopt an unmanned operation mode, after a 10kV line fault tripping or 10kV busbar undervoltage incident, the dispatcher needs to notify the operating personnel to conduct on-site inspections and collect relevant information on the on-site monitoring background and protection actions. The on-site personnel make a preliminary judgment on the fault and cooperate with the dispatcher to carry out accident handling. This means that the judgment of slow tripping of 10kV circuit breakers in the existing technology mainly relies on the protection information collected by the operating personnel after arriving at the fault site, which makes it difficult to troubleshoot the fault and the busbar re-energization time is relatively long.

[0087] In view of the technical problems in the above background technology. While researching fault diagnosis methods for circuit breakers, the inventors discovered that by using collected alarm information, they could obtain the circuit breaker's closing and shut-off times. By comparing these times with standard times, they could detect potential equipment hazards such as slow opening or closing of the circuit breaker during routine operation, effectively preventing faults caused by circuit breakers.The adverse consequences of slow-opening and / or slow-closing faults ultimately aim to ensure the stability of the power supply system.

[0088] In view of the inventor's above-mentioned technical concept, the fault diagnosis method for circuit breakers provided in this application obtains alarm information of the target substation within a preset time period, and filters out tripping command output information, closing command output information, switch tripping action information and switch closing action information according to preset keywords of circuit breaker operation. Then, for each circuit breaker, the tripping time of the circuit breaker is obtained according to at least one set of time-adjacent protection action time and switch action time corresponding to the circuit breaker; and the closing time of the circuit breaker is obtained according to at least one set of time-adjacent protection action time and switch action time corresponding to the circuit breaker. Finally, for each circuit breaker, the circuit breaker is diagnosed in advance based on the tripping time and closing time to determine whether the circuit breaker has a slow tripping fault and / or a slow closing fault. This allows maintenance personnel to perform timely maintenance on the circuit breaker when a slow tripping fault and / or a slow closing fault is diagnosed, thereby effectively avoiding the adverse consequences caused by the slow tripping or slow closing of the circuit breaker, and ultimately achieving the effect of ensuring the power supply stability of the power system.

[0089] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0090] Figure 1 is a schematic flowchart of the fault diagnosis method of the circuit breaker provided in Embodiment 1 of this application. As shown in Figure 1, the method includes:

[0091] S101, obtaining alarm information of the target plant within a preset time period.

[0092] In this step, it is necessary to obtain the alarm information of the target plant that needs to be diagnosed by the circuit breaker within a preset time period. The alarm information includes the type of the event, the identification information of the equipment that caused the event, and the time of event reporting; the preset time period can be determined according to the actual situation, and this application does not limit it. For example, the preset time period can be the previous whole day, or the current time to the previous day, etc.

[0093] In one specific implementation, the alarm information of the target plant within a preset time period can be obtained in the following way:

[0094] By simulating manual operation and logging into the event sequence recording system using simulation software, alarm information of all equipment or all circuit breaker equipment of the target plant within a preset time period can be crawled.

[0095] In the specific implementation of this solution, the simulation software can be Selenium; the time sequence recording system is an SOE system.

[0096] In this implementation, it should be understood that the SOE system includes all alarm information of all plants throughout the entire time period.Relying solely on manual screening to obtain alarm information from target plants within a preset time period is extremely labor-intensive. Therefore, this implementation method employs data crawling to obtain the required information from the SOE system. Furthermore, since the SOE system has anti-crawling mechanisms, this implementation method first simulates manual login to the SOE system using Selenium, and then crawls the alarm information from the target plant within the preset time period. This achieves the effect of quickly screening and obtaining the required information, improving the efficiency of circuit breaker fault diagnosis.

[0097] Optionally, due to the inherent lag in the SOE system's information mechanism, some alarm information may not be uploaded in time. To ensure the integrity of the crawled data, the preset time can be the previous day. For example, alarm information from the target plant within the previous day can be obtained at 9:00 AM each day. This method can ensure data integrity while providing timely alarm information for diagnosing the circuit breakers of the target plant, thereby achieving timely and effective circuit breaker diagnosis.

[0098] S102. Based on preset keywords for circuit breaker operation, filter out tripping command output information, closing command output information, switch tripping action information, and switch closing action information from the alarm information.

[0099] In this step, it is also necessary to further filter out alarm information that can be used to diagnose the circuit breaker from the alarm information of the target plant within a preset time period. Information related to circuit breaker operation can be filtered out from the alarm information based on preset keywords for circuit breaker operation. Specifically, information related to circuit breaker operation includes: tripping command output information, closing command output information, switch tripping action information, and switch closing action information.

[0100] Among them, the tripping command output information includes information reported by multiple relay protection devices in the power system when they detect a fault in the line or equipment under their responsibility and send a tripping command to the circuit breaker (the information includes the reporting time of the tripping command event); the closing command output information includes information reported by multiple reclosing devices in the power system when they detect a fault in the line or equipment under their responsibility and send a closing command to the circuit breaker (the information includes the reporting time of the closing command event); the switch tripping action information includes information reported by multiple circuit breakers when they respond to the tripping command and complete the switch tripping action (the information includes the reporting time of the switch tripping action event); the switch closing action information includes information reported by multiple circuit breakers when they respond to the closing command and complete the switch closing action (the information includes the reporting time of the switch closing action event).

[0101] In one specific implementation, the key terms for circuit breaker operation include: protection action, three-phase single reclosing, reclosing action, switch open position closing, and switch open position closing.

[0102] In this implementation, tripping command output information can be filtered based on the keyword "protection action"; closing command output information can be filtered based on the keywords "three-phase single reclosing" and "reclosing action"; switching closing action information can be filtered based on the keyword "switch open position closing"; and switching tripping action information can be filtered based on the keyword "switch open position closing".

[0103] In a specific implementation, tripping command output information, closing command output information, switching tripping action information, and switching closing action information can be filtered using regular expressions.

[0104] Optionally, after filtering tripping command output information, closing command output information, switching tripping action information, and switching closing action information from alarm information based on preset circuit breaker operation keywords, the obtained tripping command output information, closing command output information, switching tripping action information, and switching closing action information can be preprocessed to improve the reliability and accuracy of the data used for subsequent calculations. For example, preprocessing may include cleaning, outlier handling, etc.

[0105] S103. For each circuit breaker, the opening time of the circuit breaker is obtained based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker. The protection action time corresponding to the opening of each circuit breaker is included in the opening command output information, and the switch action information includes the switch action time corresponding to the opening of each circuit breaker.

[0106] In this step, based on the circuit breaker device identification information in the opening command output information and the switch action information, for each circuit breaker, the opening time is obtained based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker. The protection action time within each time set is earlier than the switch action time; the protection action time is determined based on the event reporting time in the opening command output information; the switch action time is determined based on the event reporting time in the switch action information. Instruction manual, pages 7 / 12, 10 CN 121899631 A

[0107] In a specific implementation, the circuit breaker's tripping time is obtained based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker, including:

[0108] Step 1: Sort the tripping command output information and tripping action information according to the time order of event reporting.

[0109] In this step, since the obtained tripping command output information and switch tripping action information are out of order, in order to conveniently obtain at least one set of time-adjacent protection action times and switch action times, it is necessary to sort the tripping command output information and tripping action information together according to the time order of event reporting.

[0110] Step 2: Obtain the circuit breaker's tripping time based on the sorted tripping command output information and switch tripping action information.At least one set of time-adjacent protection action times and switch action times.

[0111] In this step, in order to obtain at least one set of paired protection action times and switch action times corresponding to the circuit breaker, it is necessary to select at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker from the trip command output information and the switch trip action information.

[0112] Further, in one implementation, obtaining at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker according to the sorted trip command output information and switch trip action information includes:

[0113] According to the sorted trip command output information and switch trip action information, obtaining at least one set of time-adjacent trip command events and switch trip action events corresponding to the circuit breaker; for each set of events, the reporting time of the trip command event is taken as the protection action time of the set of events, and the reporting time of the switch trip action event is taken as the switch action time of the set of events.

[0114] Step 3: Calculate the average time difference between the protection action time and the switch action time of each group of time-adjacent protection action times to obtain the circuit breaker's opening time.

[0115] In this step, for each group of time-adjacent protection action times and switch action times, it is necessary to calculate the time difference between the protection action time and the switch action time of that group, and calculate the average time difference of each group to obtain the circuit breaker's opening time.

[0116] In this implementation, the opening command output information and the opening action information are sorted first, and according to the sorting result, at least one group of time-adjacent protection action times and switch action times corresponding to the circuit breaker are obtained (i.e., at least one pair of protection action times and switch action times are obtained), and the opening time used to diagnose whether the circuit breaker has a slow opening fault is successfully calculated based on the at least one group of time-adjacent protection action times and switch action times.

[0117] S104. Obtain the closing time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker. The closing command output information includes the protection action time corresponding to the closing of each circuit breaker, and the switch closing action information includes the switch action time corresponding to the closing of each circuit breaker.

[0118] In this step, based on the identification information of the circuit breaker device in the closing command output information and the switch closing action information, for each circuit breaker, the closing time is obtained by analyzing at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker. The protection action time within each time set is earlier than the switch action time; the protection action time is determined based on the event reporting time in the closing command output information; the switch action time is determined based on the event reporting time in the switch closing action information.

[0119] It should be understood that since a circuit breaker may respond to tripping commands multiple times within a preset time period to complete the tripping action or respond to closing commands multiple times to complete the closing action, in order to avoid using mismatched protection action times and switch action times to calculate the tripping or closing time, which would affect the accuracy and reliability of the circuit breaker fault diagnosis results, this application adopts a method of pairing protection action times and switch action times according to the principle of "adjacent time" and "protection action time earlier than switch action time" (page 8 / 12 of the instruction manual, CN 121899631 A). This determines the correspondence between the protection action time and switch action time in the tripping command output information and the switch tripping action information (or determines the correspondence between the protection action time and switch action time in the closing command output information and the closing command output information), and obtains at least one set of time-adjacent protection action times and switch action times for calculating the tripping time (or closing time), so as to reliably calculate the circuit breaker's tripping time (or closing time), thereby ensuring the accuracy and reliability of the circuit breaker fault diagnosis results.

[0120] In one specific implementation, the closing time of the circuit breaker is obtained based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker, including:

[0121] Step 1: Sort the closing command output information and switch closing action information according to the time order of event reporting.

[0122] In this step, since the obtained closing command output information and switch closing action information are out of order, in order to facilitate the acquisition of at least one set of time-adjacent protection action times and switch action times, it is necessary to sort the closing command output information and closing action information together according to the time order of event reporting.

[0123] Step 2: Obtain at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker based on the sorted closing command output information and switch closing action information.

[0124] In this step, in order to obtain at least one set of paired protection action times and switch action times corresponding to the circuit breaker, it is necessary to select at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker from the closing command output information and switch closing action information.

[0125] Further, in one implementation, based on the sorted closing command output information and switch closing action information, obtaining at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker includes:

[0126] Based on the sorted closing command output information and switch closing action information, obtaining at least one set of time-adjacent closing command events and switch closing action events corresponding to the circuit breaker; for each set of events, using the reporting time of the closing command event as the protection action time of this set of events, and using the reporting time of the switch closing action event as the protection action time of this set of events.The time interval is used as the switching action time of this group of events.

[0127] Step 3: Calculate the average time difference between the protection action time and the switching action time of each group of time-adjacent events to obtain the closing time of the circuit breaker.

[0128] In this step, for each group of time-adjacent protection action time and switching action time, it is necessary to calculate the time difference between the protection action time and the switching action time of the group, and calculate the average time difference of each group to obtain the closing time of the circuit breaker.

[0129] In this implementation, the closing command output information and closing action information are sorted first, and according to the sorting result, at least one group of time-adjacent protection action time and switching action time corresponding to the circuit breaker are obtained (that is, at least one pair of protection action time and switching action time are obtained), and according to the at least one group of time-adjacent protection action time and switching action time, the closing time used to diagnose whether the circuit breaker has a slow closing fault is successfully obtained.

[0130] S105: For each circuit breaker, according to the opening time and closing time of the circuit breaker, determine whether the circuit breaker has a slow opening fault and / or a slow closing fault.

[0131] In this step, for each circuit breaker, it is necessary to determine whether the circuit breaker has a slow opening fault based on the obtained opening time, and / or, whether the circuit breaker has a slow closing fault based on the obtained closing time.

[0132] In a specific implementation, the following method can be used to determine whether the circuit breaker has a slow opening fault and / or a slow closing fault based on the opening and closing times:

[0133] If the opening time of the circuit breaker is greater than the preset opening standard time, it is determined that the circuit breaker has a slow opening fault; and / or, if the closing time of the circuit breaker is greater than the preset closing standard time, it is determined that the circuit breaker has a slow closing fault.

[0134] Wherein, the preset opening standard time can be determined according to the actual situation, and this application does not limit it. For example, the preset opening standard time and the preset closing standard time of the circuit breaker can be determined according to the model of each circuit breaker.

[0135] In one specific implementation, if it is determined that the circuit breaker has a slow opening fault and / or a slow closing fault, an alarm message is pushed to the target terminal. The alarm message is used to indicate that the circuit breaker has a slow opening fault and / or a slow closing fault.

[0136] Optionally, the alarm message can be pushed to the target terminal of the relevant department via email, SMS push, mini-program push, and Southern Power Grid's e-Link, etc.

[0137] The circuit breaker fault diagnosis method provided in this application embodiment obtains the alarm information of the target plant within a preset time period, and filters out the opening command output information, closing command output information, switch opening action information, and switch closing action information according to the preset keywords of circuit breaker operation. Then, for each circuit breaker, according to the corresponding circuit breaker...The circuit breaker's opening time is obtained by taking at least one set of time-adjacent protection action times and switch action times; and the circuit breaker's closing time is obtained based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker. Finally, for each circuit breaker, the circuit breaker's opening and closing times are used to determine whether the circuit breaker has a slow opening fault and / or slow closing fault. This allows for early fault diagnosis of the circuit breaker, enabling maintenance personnel to perform timely maintenance when a slow opening fault and / or slow closing fault is diagnosed, thereby effectively avoiding adverse consequences caused by slow opening or slow closing of the circuit breaker, and ultimately ensuring the power supply stability of the power system.

[0138] Figure 2 is a flowchart illustrating a specific circuit breaker fault diagnosis method provided in Embodiment 2 of this application. As shown in Figure 2, firstly, after logging into the SOE system using Selenium to simulate manual operation, the alarm information is crawled based on whether each alarm message is from the target plant (e.g., Meizhou Bureau) and whether it is an alarm message from a circuit breaker device. Then, the alarm information of all circuit breaker devices in the target plant within a preset time period is sorted, and the sorted information is analyzed to obtain analysis results indicating whether each circuit breaker has a slow opening fault and / or slow closing fault. Finally, the alarm information is sent to the target terminal of the relevant department using China Southern Power Grid's e-Link.

[0139] Figure 3 is a structural schematic diagram of the circuit breaker fault diagnosis device provided in Embodiment 3 of this application. As shown in Figure 3, the circuit breaker fault diagnosis device 20 provided in this embodiment includes:

[0140] an acquisition unit 201, used to acquire alarm information of the target plant within a preset time period;

[0141] a filtering unit 202, used to filter out tripping command output information, closing command output information, switch tripping action information and switch closing action information from the alarm information according to preset keywords of circuit breaker operation;

[0142] a first processing unit 203, used to acquire the tripping time of each circuit breaker according to at least one set of time-adjacent protection action time and switch action time corresponding to the circuit breaker, wherein the tripping command output information includes the protection action time corresponding to the tripping of each circuit breaker, and the switch tripping action information includes the switch action time corresponding to the tripping of each circuit breaker;

[0143] The second processing unit 204 is used to obtain the closing time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker. The closing command output information includes the protection action time corresponding to the closing of each circuit breaker, and the switch closing action information includes the switch action time corresponding to the closing of each circuit breaker.

[0144] The determining unit 205 is used to determine, for each circuit breaker, the opening time and closing time of the circuit breaker.Determine whether the circuit breaker has a slow opening fault and / or a slow closing fault.

[0145] The circuit breaker fault diagnosis device 20 provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here. Specification 10 / 12 pages 13 CN 121899631 A

[0146] Figure 4 is a schematic diagram of the structure of the circuit breaker fault diagnosis device provided in Embodiment 4 of this application. As shown in Figure 4, based on the above embodiments, the circuit breaker fault diagnosis device 20 provided in this embodiment further includes:

[0147] An alarm unit 206, used to push alarm information to the target terminal if it is determined that the circuit breaker has a slow opening fault and / or a slow closing fault. The alarm information is used to indicate that the circuit breaker has a slow opening fault and / or a slow closing fault.

[0148] In one possible implementation, the determining unit 205 is specifically used for:

[0149] If the opening time of the circuit breaker is greater than the preset opening standard time, then it is determined that the circuit breaker has a slow opening fault;

[0150] and / or,

[0151] If the closing time of the circuit breaker is greater than the preset closing standard time, then it is determined that the circuit breaker has a slow closing fault.

[0152] In one possible implementation, the acquiring unit 201 is specifically used for:

[0153] By simulating manual operation and logging into the event sequence recording system through simulation software, crawling all equipment or all circuit breaker equipment of the target plant within a preset time period to retrieve alarm information.

[0154] In one possible implementation, the keywords of circuit breaker operation in the filtering unit include: protection action, three-phase single reclosing, reclosing action, switch open position closing, and switch closed position opening.

[0155] In one possible implementation, the first processing unit 203 includes:

[0156] a first sorting module, configured to sort the tripping command output information and the switch tripping action information according to the time order of event reporting;

[0157] a first acquisition module, configured to acquire at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker based on the sorted tripping command output information and switch tripping action information;

[0158] a second acquisition module, configured to calculate the average value of the time difference between each set of time-adjacent protection action times and switch action times to obtain the tripping time of the circuit breaker.

[0159] In one possible implementation, the second processing unit 204 includes:

[0160] a second sorting module, configured to sort the closing command output information and the switch closing action information according to the time order of event reporting;

[0161] a third acquisition module, configured to acquire the average value of the time difference between each set of time-adjacent protection action times and switch closing action times to obtain the tripping time of the circuit breaker.The circuit breaker is equipped with at least one set of time-adjacent protection action times and switch action times;

[0162] The fourth acquisition module is used to calculate the average value of the time difference between each set of time-adjacent protection action times and switch action times to obtain the closing time of the circuit breaker.

[0163] In one possible implementation, the first acquisition module is specifically used to:

[0164] Based on the sorted tripping command output information and switch tripping action information, acquire at least one set of time-adjacent tripping command events and switch tripping action events corresponding to the circuit breaker;

[0165] For each set of events, the reporting time of the tripping command event is taken as the protection action time of the set of events, and the reporting time of the switch tripping action event is taken as the switch action time of the set of events.

[0166] In one possible implementation, the third acquisition module is specifically used for:

[0167] acquiring at least one set of closing command events and switch closing action events with adjacent reporting times corresponding to the circuit breaker according to the sorted closing command output information and switch closing action information;

[0168] for each set of events, the reporting time of the closing command event is taken as the protection action time of the set of events, and the reporting time of the switch closing action event is taken as the switch action time of the set of events. Specification 11 / 12 pages 14 CN 121899631 A

[0169] The fault diagnosis device 20 of the circuit breaker provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0170] Figure 5 is a schematic diagram of the structure of the computer device provided in this application. As shown in Figure 5, the computer device 30 provided in this embodiment includes: at least one processor 301 and a memory 302. Optionally, the device 30 also includes a communication component 303. The processor 301, memory 302, and communication component 303 are connected via bus 304.

[0171] In a specific implementation, at least one processor 301 executes computer execution instructions stored in memory 302, causing at least one processor 301 to execute the above-described method.

[0172] The specific implementation process of processor 301 can be found in the above-described method embodiments, and its implementation principle and technical effects are similar. This embodiment will not be repeated here.

[0173] This application also provides a computer-readable storage medium storing computer execution instructions. When a processor executes the computer execution instructions, the above-described method is implemented.

[0174] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0175] Finally, it should be noted that those skilled in the art, after considering the specification and practicing the invention disclosed herein, will readily understand...Other embodiments of the invention are readily conceived. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims. CN 121899631 A Figure 1 Figure 2 Figure 1 of the description page 16 CN 121899631 A Figure 3 Figure 4 Figure 2 of the description page 17 CN 121899631 A Figure 5 Figure 3 of the description page 18 CN 121899631 A Abstract Embodiments of the present application provide a method and an apparatus for diagnosis fault of a circuit breaker, a device, and a medium. The method includes: obtaining alarm information of a target plant station within a preset time period; filtering out opening command output information, closing command output information, switch opening action information, and switch closing action information according to a preset circuit breaker operation keyword;obtaining a closing time of the circuit breaker according to at least one group of temporally adjacent protection action time and switch action time corresponding to the circuit breaker; and for each circuit breaker, determining, based on the opening time and the closing time of the circuit breaker, whether the circuit breaker has a slow-opening fault and / or a slow-closing fault. The method achieves the effect of ensuring power supply stability of the power system.

Claims

1. A fault diagnosis method for a circuit breaker, characterized in that, include: Obtain alarm information from the target plant within a preset time period; Based on the preset keywords for circuit breaker operation, the tripping command output information, closing command output information, switch tripping action information, and switch closing action information are filtered out from the alarm information. For each circuit breaker, the opening time of the circuit breaker is obtained based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker. The opening command output information includes the protection action time corresponding to the opening of each circuit breaker, and the switch opening action information includes the switch action time corresponding to the opening of each circuit breaker. Based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker, the closing time of the circuit breaker is obtained. The closing command output information includes the protection action time corresponding to the closing of each circuit breaker, and the switch closing action information includes the switch action time corresponding to the closing of each circuit breaker. For each circuit breaker, determine whether the circuit breaker has a slow opening fault and / or a slow closing fault based on the opening and closing times of the circuit breaker. In each time period, the protection action time is earlier than the switch action time.

2. The method according to claim 1, characterized in that, The step of determining whether the circuit breaker has a slow opening fault and / or slow closing fault based on the opening and closing times of the circuit breaker includes: If the circuit breaker's opening time is greater than the preset opening standard time, then the circuit breaker is determined to have a slow opening fault. And / or, If the closing time of the circuit breaker is greater than the preset closing standard time, it is determined that the circuit breaker has a slow closing fault.

3. The method according to claim 1 or 2, characterized in that, The acquisition of alarm information from the target plant within a preset time period includes: The system simulates manual login to the event sequence recording system using simulation software, and crawls alarm information of all equipment or all circuit breaker equipment in the target plant within a preset time period.

4. The method according to claim 1 or 2, characterized in that, The key terms for circuit breaker operation include: protection action, three-phase single reclosing, reclosing action, switch open position closing, and switch closed position opening.

5. The method according to claim 1 or 2, characterized in that, The step of obtaining the opening time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker includes: The tripping command output information and the switch tripping action information are sorted according to the time sequence of event reporting. Based on the sorted trip command output information and switch trip action information, obtain at least one set of time-adjacent protection action time and switch action time corresponding to the circuit breaker. The average time difference between the protection action time and the switch action time of each adjacent time group is calculated to obtain the opening time of the circuit breaker.

6. The method according to claim 1 or 2, characterized in that, The step of obtaining the closing time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker includes: The closing command output information and the switch closing action information are sorted according to the time sequence of event reporting. Based on the sorted closing command output information and switch closing action information, obtain at least one set of time-adjacent protection action time and switch action time corresponding to the circuit breaker. The closing time of the circuit breaker is obtained by calculating the average time difference between the protection action time and the switch action time of each adjacent time group.

7. The method according to claim 5, characterized in that, The step of obtaining at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker based on the sorted tripping command output information and switch tripping action information includes: Based on the sorted tripping command output information and switch tripping action information, at least one set of tripping command events and switch tripping action events with adjacent reporting times corresponding to the circuit breaker are obtained. For each group of events, the reporting time of the tripping command event is taken as the protection action time of this group of events, and the reporting time of the switch tripping action event is taken as the switch action time of this group of events.

8. The method according to claim 6, characterized in that, The step of obtaining at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker based on the sorted closing command output information and switch closing action information includes: Based on the sorted closing command output information and switch closing action information, at least one set of closing command events and switch closing action events with adjacent reporting times corresponding to the circuit breaker are obtained. For each group of events, the reporting time of the closing command event is taken as the protection action time of this group of events, and the reporting time of the switch closing action event is taken as the switch action time of this group of events.

9. The method according to any one of claims 1, 2, 7 or 8, characterized in that, The method further includes: If it is determined that the circuit breaker has a slow opening fault and / or a slow closing fault, an alarm message is pushed to the target terminal, the alarm message being used to indicate that the circuit breaker has a slow opening fault and / or a slow closing fault.

10. A fault diagnosis device for a circuit breaker, characterized in that, include: The acquisition unit is used to acquire alarm information of the target plant within a preset time period; The filtering unit is used to filter out tripping command output information, closing command output information, switch tripping action information and switch closing action information from the alarm information based on preset keywords of circuit breaker operation. The first processing unit is used to obtain the opening time of each circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker. The opening command output information includes the protection action time corresponding to the opening of each circuit breaker, and the switch opening action information includes the switch action time corresponding to the opening of each circuit breaker. The second processing unit is used to obtain the closing time of the circuit breaker based on at least one set of time-adjacent protection action times and switch action times corresponding to the circuit breaker. The closing command output information includes the protection action time corresponding to the closing of each circuit breaker, and the switch closing action information includes the switch action time corresponding to the closing of each circuit breaker. The determining unit is used to determine, for each circuit breaker, whether there is a slow opening fault and / or a slow closing fault, based on the opening and closing times of the circuit breaker. In each time period, the protection action time is earlier than the switch action time.

11. A computer device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-9.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-9.

Images