Method and device for monitoring electrical life of circuit breaker and non-intrusive monitoring system

Abstract

The invention provides a circuit breaker electrical life monitoring method and device and a non-intrusive monitoring system, the monitoring device applied to the non-intrusive monitoring system comprises a monitoring device, at least one industrial personal computer and at least one tested circuit breaker in communication connection with each industrial personal computer; the method comprises the following steps: monitoring whether a data output directory corresponding to a target industrial personal computer is updated or not in real time; if yes, obtaining a current to-be-processed target on-off data file in the data output directory; analyzing the target on-off data file to obtain a plurality of feature parameters corresponding to the target on-off data file; and determining the current health degree of the tested circuit breaker corresponding to the target industrial personal computer according to the plurality of characteristic parameters and other on-off data files in the data output directory corresponding to the target industrial personal computer. The whole process does not need manual intervention, the problem of lag caused by manual offline in the prior art is solved, and the monitoring efficiency and the intelligent level of the electrical life of the circuit breaker are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breakers, in particular to a circuit breaker electrical life monitoring method, device and non-invasive monitoring system. BACKGROUND

[0002] As a key protection and control device in the power system, the reliability of the circuit breaker is directly related to the safe and stable operation of the power grid. In actual working conditions, the circuit breaker needs to frequently perform on-off operations to isolate faults or switch circuits, and each on-off process will generate an arc between the contacts. The arc has high temperature and high energy characteristics, which can cause the melting, evaporation and spattering of the contact material, thereby causing irreversible electrical wear. The performance degradation caused by the cumulative arc erosion determines the electrical life of the circuit breaker. Electrical life becomes the main factor limiting the overall service life of the circuit breaker, especially in high-current or frequent operation application scenarios, the contact wear is aggravated, and the electrical life decay is more rapid. Therefore, accurately monitoring the electrical life of the circuit breaker is particularly important.

[0003] The existing electrical life monitoring is monitored offline by hand, resulting in low real-time and efficiency of monitoring. SUMMARY

[0004] The purpose of the present application is to provide a circuit breaker electrical life monitoring method, device and non-invasive monitoring system to improve the efficiency of monitoring the electrical life of the circuit breaker, in view of the deficiencies in the prior art.

[0005] To achieve the above purpose, the technical solutions adopted by the embodiments of the present application are as follows: In a first aspect, the embodiments of the present application provide a circuit breaker electrical life monitoring method applied to a monitoring device in a non-invasive monitoring system, wherein the non-invasive monitoring system comprises: the monitoring device, at least one industrial computer and at least one measured circuit breaker in communication connection with each industrial computer; the industrial computer is used to collect on-off data of the corresponding measured circuit breaker and store the on-off data in an on-off data file in a data output directory corresponding to the industrial computer; the method comprises: monitoring whether the data output directory corresponding to the target industrial computer is updated in real time; If yes, obtaining a target on-off data file currently to be processed in the data output directory, the target industrial computer being any industrial computer in the non-invasive monitoring system, and at least one on-off data file being stored in the data output directory corresponding to the target industrial computer; analyzing the target on-off data file to obtain a plurality of characteristic parameters corresponding to the target on-off data file; According to the plurality of characteristic parameters and other on-off data files in a data output directory corresponding to the target industrial computer, a current health degree of the target industrial computer corresponding to the measured circuit breaker is determined.

[0006] Optionally, the real-time monitoring of whether the data output directory corresponding to the target industrial computer is updated comprises: The network sharing protocol is used to monitor whether there is a new file in the data output directory corresponding to the target industrial computer in real time, and if so, it is determined that the data output directory corresponding to the target industrial computer is updated. When the target industrial computer collects on-off data from the measured circuit breaker connected to the target industrial computer, the industrial computer adds an on-off data file to the data output directory corresponding to the target industrial computer, and saves the collected on-off data to the added on-off data file.

[0007] Optionally, the obtaining of the current target on-off data file to be processed in the data output directory comprises: The newly added on-off data file is obtained from the data output directory. The newly added on-off data file is added to the to-be-processed data queue of the monitoring device, and the first on-off data file in the to-be-processed data queue is taken as the target on-off data file.

[0008] Optionally, the analysis of the target on-off data file to obtain a plurality of characteristic parameters corresponding to the target on-off data file comprises: The target on-off data file is analyzed according to the type of the target on-off data file to obtain current and voltage data corresponding to the target on-off data file. Characteristic extraction processing is performed on the current and voltage data to obtain the plurality of characteristic parameters.

[0009] Optionally, the analysis of the target on-off data file according to the type of the target on-off data file comprises: A parsing template corresponding to the target on-off data file is determined according to the type of the target on-off data file, and the target on-off data file is parsed based on the parsing template.

[0010] Optionally, the characteristic extraction processing on the current and voltage data to obtain the plurality of characteristic parameters comprises: The current data and the voltage data in the current and voltage data are respectively preprocessed to obtain preprocessed current data and preprocessed voltage data. The preprocessed voltage data is analyzed to obtain an arc ignition point, and the preprocessed current data is analyzed to obtain an arc extinction point. determine an arc time, a maximum arc voltage, a thermal effect parameter, and an energy integral parameter according to the arc initiation point and the arc termination point.

[0011] Optionally, the determining the current health degree of the target industrial computer corresponding to the measured circuit breaker according to the plurality of characteristic parameters and other on-off data files in a data output directory corresponding to the target industrial computer comprises: inputting the plurality of characteristic parameters and other on-off data files in a data output directory of the target industrial computer into a preset model, determining a plurality of groups of to-be-processed data by the preset model, the plurality of groups of to-be-processed data comprising the current plurality of characteristic parameters and a preset number of historical plurality of characteristic parameters; performing prediction analysis on the plurality of groups of to-be-processed data by the preset model to obtain the current health degree.

[0012] Optionally, after the determining the current health degree of the target industrial computer corresponding to the measured circuit breaker according to the plurality of characteristic parameters and other on-off data files in a data output directory corresponding to the target industrial computer, the method further comprises: generating an electrical life change curve of the target industrial computer corresponding to the measured circuit breaker according to the current health degree and a historical health degree corresponding to the target industrial computer, and displaying the electrical life change curve on a display screen.

[0013] In a second aspect, the embodiments of the present application further provide a circuit breaker electrical life monitoring device, comprising a memory and a processor, the memory stores a computer program executable by the processor, and the processor implements the steps of the circuit breaker electrical life monitoring method of the first aspect when executing the computer program.

[0014] In a third aspect, the embodiments of the present application further provide a non-invasive monitoring system, comprising: the monitoring device of the second aspect, at least one industrial computer, and at least one measured circuit breaker in communication connection with each of the industrial computers. The monitoring device is used to execute the steps of the circuit breaker electrical life monitoring method of the first aspect.

[0015] In a fourth aspect, the embodiments of the present application further provide a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program reads and executes the steps of the circuit breaker electrical life monitoring method of the first aspect.

[0016] The present application has the following beneficial effects: This application provides a method, device, and non-intrusive monitoring system for monitoring the electrical life of circuit breakers. The system uses a non-intrusive monitoring device to monitor in real time whether the data output directory corresponding to the target industrial control computer is updated; it obtains the target on / off data file currently to be processed in the data output directory; it parses the target on / off data file to obtain multiple characteristic parameters corresponding to the target on / off data file; and based on these multiple characteristic parameters and other on / off data files in the data output directory corresponding to the target industrial control computer, it determines the current health status of the circuit breaker under test corresponding to the industrial control computer. Real-time monitoring using a non-intrusive monitoring device avoids adding extra structures to the circuit breaker side, utilizes existing industrial control computer output data as the monitoring object, achieves non-destructive deployment, is compatible with existing test platforms, significantly reduces system integration costs and engineering complexity, and analyzes the target on / off data file to obtain multiple characteristic parameters, providing a reliable data sequence foundation for subsequently constructing a health trend curve. The entire process requires no manual intervention, and is fully automated from data monitoring to health status output, solving the lag problem caused by offline manual operation in existing technologies and improving the efficiency and intelligence level of circuit breaker electrical life monitoring. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This application provides a schematic diagram of the architecture of a non-intrusive monitoring system. Figure 2 A flowchart illustrating a method for monitoring the electrical life of a circuit breaker, provided in an embodiment of this application; Figure 3 A flowchart illustrating the second method for monitoring the electrical life of a circuit breaker provided in this application embodiment; Figure 4 A flowchart illustrating the third method for monitoring the electrical life of a circuit breaker provided in this application embodiment; Figure 5 A flowchart illustrating the fourth method for monitoring the electrical life of a circuit breaker provided in this application embodiment; Figure 6 This is a structural block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0019] In order to make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of description and illustration, and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn according to the actual proportions. The flowcharts used in the present application show the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowcharts can not be implemented in sequence, and the steps without logical context relationship can be reversed in sequence or implemented simultaneously. In addition, one or more other operations can be added to the flowcharts or one or more operations can be removed from the flowcharts under the guidance of the content of the present application.

[0020] In addition, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0022] Figure 1 A schematic diagram of an architecture of a non-intrusive monitoring system provided by the embodiments of the present application is shown in FIG. 1. As shown in FIG. 1, the non-intrusive monitoring system in the present application can include a monitoring device, at least one industrial computer, and at least one measured circuit breaker in communication connection with each industrial computer. Figure 1

[0023] The industrial computer can collect on-off data of the measured circuit breaker connected to the industrial computer, and store the on-off data into an on-off data file in a data output directory corresponding to the industrial computer. The monitoring device realizes monitoring of the electrical life of the measured circuit breaker connected to the industrial computer by using the circuit breaker electrical life monitoring method provided by the embodiments of the present application.

[0024] The industrial computer and the measured circuit breaker can be arranged in a life test station, and the monitoring device can be arranged outside the life test station.

[0025] It should be noted that the number of industrial computers in the present application is only an example, and the number of industrial computers connected to the monitoring device can also be other numbers, which are not limited herein.

[0026] ​Optionally, the monitoring device can be a server arranged in the cloud, or can also be a terminal device arranged at the user side, such as a mobile phone, a tablet computer, a notebook computer, a palm computer, a desktop computer and the like terminal device used by the user and having a computing processing capability and a display function.

[0027] The specific implementation process of the circuit breaker electrical life monitoring provided in the embodiment of the present application will be explained below.

[0028] Figure 2 A flowchart of a circuit breaker electrical life monitoring method provided in the embodiment of the present application is shown in the figure, and the execution subject of the method is the monitoring device as described above. As shown in the figure, the method comprises the following steps. Figure 2 S101, real-time monitoring whether a data output directory corresponding to a target industrial computer is updated.

[0029] The target industrial computer can be any one industrial computer connected with the monitoring device. Each industrial computer can correspond to one data output directory, and at least one on-off data file can be included in the data output directory. The monitoring device can monitor whether the data output directories corresponding to multiple industrial computers are updated at the same time, and only one industrial computer is described herein. In the monitoring process, the monitoring device can continuously poll or listen to the state change of the data output directory.

[0030] Optionally, whether the data output directory is updated refers to whether the on-off data file in the data output target is updated.

[0031] Specifically, if the data output directory corresponding to the target industrial computer is updated, the following S102 step is executed; if the data output directory corresponding to the target industrial computer is not updated, the S101 step is returned.

[0032] For example, for the industrial computer 1, the industrial computer 1 can correspond to the data output directory 1; for the industrial computer 2, the industrial computer 2 can correspond to the data output directory 2; for the industrial computer 3, the industrial computer 3 can correspond to the data output directory 3. If the target industrial computer is the industrial computer 1, the monitoring device can real-time monitor whether the data output directory 1 corresponding to the industrial computer 1 is updated.

[0033] S102, obtaining a target on-off data file currently to be processed in the data output directory.

[0034] The target industrial computer is any industrial computer in the non-intrusive monitoring system, and at least one on-off data file is stored in the data output directory corresponding to the target industrial computer.

[0035] ​The current target on-off data file is one of the on-off data files in the data output directory corresponding to the target industrial computer. The on-off data file can include current and voltage data of the measured circuit breaker connected to the target industrial computer in a complete on-off process.

[0036] For example, the on-off data file A3 corresponding to the data output directory 1 of the industrial computer 1 can be obtained as the target on-off data file. The on-off data file A3 is the current and voltage data of the measured circuit breaker A connected to the industrial computer 1 during the on-off operation at t3.

[0037] S103, analyze the target on-off data file to obtain a plurality of characteristic parameters corresponding to the target on-off data file.

[0038] Specifically, the monitoring device can analyze and process the current and voltage data in the target on-off data file to obtain a plurality of characteristic parameters corresponding to the target on-off data file. The plurality of characteristic parameters can include, for example, arc time, maximum arc voltage, current thermal effect, and energy integral.

[0039] For example, the monitoring device can analyze the on-off data file A3 to obtain a plurality of characteristic parameters corresponding to the on-off data file A3.

[0040] S104, determining the current health degree of the measured circuit breaker corresponding to the target industrial computer according to the plurality of characteristic parameters and other on-off data files in the data output directory corresponding to the target industrial computer.

[0041] The other on-off data files in the data output directory corresponding to the target industrial computer refer to the on-off data files generated by the measured circuit breaker connected to the target industrial computer during on-off operation at other times. The determined current health degree refers to the current health degree corresponding to the target on-off data file.

[0042] For example, for the industrial computer 1, the target on-off data file A3 is the on-off data file generated by the measured circuit breaker A during on-off operation at t3. The other on-off data files in the data output directory 1 of the industrial computer 1 can be, for example, the on-off data file A2 generated by the measured circuit breaker A during on-off operation at t2, the on-off data file A1 generated by the measured circuit breaker A during on-off operation at t1, and the like.

[0043] For example, the monitoring device can determine the current health degree of the measured circuit breaker A using a preset method according to the plurality of characteristic parameters of the on-off data file A3 and the on-off data files A1 and A2 in the data output directory 1, i.e., determine the current health degree of the measured circuit breaker at t3.

[0044] In this embodiment, whether the data output directory corresponding to the target industrial computer is updated in real time is monitored by a non-intrusive monitoring device; a target on-off data file currently to be processed in the data output directory is obtained; the target on-off data file is parsed to obtain a plurality of characteristic parameters corresponding to the target on-off data file; and the current health degree of the circuit breaker corresponding to the industrial computer is determined according to the plurality of characteristic parameters and other on-off data files in the data output directory corresponding to the target industrial computer. Real-time monitoring is performed by the non-intrusive monitoring device, additional structures are avoided on the circuit breaker side, the existing industrial computer output data is used as a monitoring object, lossless deployment is realized, the existing test platform is compatible, the system integration cost and engineering complexity are significantly reduced, and the plurality of characteristic parameters are obtained by analyzing the target on-off data file, thereby providing a reliable data sequence basis for subsequent construction of a health trend curve. The entire process is completed automatically from data monitoring to health degree output without manual intervention, the lag problem caused by manual offline in the prior art is solved, and the circuit breaker electrical life monitoring efficiency and intelligent level are improved.

[0045] Optionally, the real-time monitoring of whether the data output directory corresponding to the target industrial computer is updated in S101 can include: Specifically, whether there is a new file in the data output directory corresponding to the target industrial computer is monitored in real time through a network sharing protocol. If yes, it is determined that the data output directory corresponding to the target industrial computer is updated. If a new file or a time stamp is monitored in the data output directory, it is determined that the data output directory has been updated.

[0046] Optionally, a monitoring program can be run in the monitoring device to monitor whether the data output directory corresponding to the target industrial computer is updated. Specifically, the monitoring program can use a file system event notification mechanism to monitor whether the mounted data output directory is updated.

[0047] When the target industrial computer collects on-off data from the measured circuit breaker connected to the target industrial computer, the industrial computer adds an on-off data file to the data output directory corresponding to the target industrial computer, and saves the collected on-off data to the added on-off data file. Specifically, when the target industrial computer collects complete on-off operation data from the measured circuit breaker connected thereto once, a new on-off data file, such as a log file named by time or a preset format file, is created, and the current, voltage waveform data and related meta information collected this time are saved to the new on-off data file. Therefore, the appearance of a new file in the data output directory means that a new circuit breaker action event has been completed, and has a data basis for subsequent health degree analysis.

[0048] Optionally, the monitoring device can be connected with the industrial personal computer in the life test station through Ethernet. Each industrial personal computer can run Windows 7 operating system, undertake the control of the circuit breaker life test and the collection of on-off data. The data interaction between the monitoring device and the industrial personal computer can be realized by using a network sharing protocol. When the target industrial personal computer collects the on-off operation of the measured circuit breaker, an on-off data file is generated, and the generated on-off data file is saved in the data output directory corresponding to the target industrial personal computer. The data output directory corresponding to the target industrial personal computer can be mounted to the file system of the monitoring device in a mounted manner, so that the monitoring device can monitor the data output directory corresponding to the target industrial personal computer in the file system in real time through the network sharing protocol.

[0049] In the embodiment, the monitoring device can access the data output directory corresponding to the target industrial personal computer in the manner of the network sharing protocol, so as to obtain the data in the test station without affecting the normal work of the original system of the test station. The non-invasive automatic capture of the output data of the industrial personal computer is realized, the existing industrial control system software logic does not need to be modified or additional sensors need to be added, the data access can be completed only by using the network sharing protocol, the compatibility and deployment flexibility of the system are improved. At the same time, since the real-time monitoring mechanism is adopted, the timeliness of the electrical life evaluation result is good, and the demand of the industrial field for dynamic tracking of the equipment state is met.

[0050] Figure 3 The flowchart of the second circuit breaker electrical life monitoring method provided in the embodiment of the application is shown in Figure 3 The above S102 can include the following steps. S201, obtaining a newly added on-off data file from the data output directory.

[0051] Optionally, the monitoring device detects that the data output directory corresponding to the target industrial personal computer is updated through the monitoring program, and when the writing of the new file in the data output directory is completed, that is, the data collection of one on-off operation of the measured circuit breaker connected with the target industrial personal computer is completed and saved in the data output directory corresponding to the target industrial personal computer, the monitoring device immediately captures the new event, and the monitoring device obtains the newly added on-off data file from the data output directory mounted in the file system of the monitoring device through the network sharing protocol.

[0052] S202, adding the newly added on-off data file to the to-be-processed data queue of the monitoring device, and taking the first on-off data file in the to-be-processed data queue as the target on-off data file.

[0053] Optionally, after obtaining the newly added on-off data file, the monitoring device can add the newly added on-off data file to a to-be-processed data queue maintained internally by the monitoring device, for example, the newly added on-off data file can be arranged in the to-be-processed data queue in the order of acquisition time. The to-be-processed data queue can be implemented in a linked list structure in the memory or a queue management mechanism persisted in the non-volatile memory, to cache data files to be parsed and analyzed, and prevent data loss due to insufficient instantaneous processing capacity.

[0054] Optionally, each time the data processing flow is executed, that is, the on-off data file needs to be parsed, the monitoring device can take out the first on-off data file at the head of the to-be-processed data queue and determine it as the target on-off data file to be processed currently. This ensures the sequentiality and traceability of data processing, especially suitable for the case of continuous arrival of multiple files in a high-concurrency scenario, ensures that all on-off events are processed in the order of occurrence, and avoids event timing disorder.

[0055] In this embodiment, the event-driven file monitoring enables the system to respond to the test process in real time, and usually starts analysis and processing within a few hundred milliseconds after the data file is generated, meeting the timeliness requirement of life monitoring.

[0056] Figure 4 A flowchart of a third circuit breaker electrical life monitoring method provided in the embodiments of the present application is shown in FIG. 3. Figure 4 As shown in S103 above, the analysis of the target on-off data file to obtain the plurality of characteristic parameters corresponding to the target on-off data file can include: S301, analyzing the target on-off data file according to the type of the target on-off data file to obtain current and voltage data corresponding to the target on-off data file.

[0057] The on-off data file can be from different types of industrial computers or comply with different communication protocol standards, and the structure and encoding method of the on-off data file are different, and the type of the obtained on-off data file can be different. The type of the on-off data file can be, for example, a technical management streaming (tdms) binary file or a logical volume manager (lvm) file in text format.

[0058] S302, performing feature extraction processing on the current and voltage data to obtain a plurality of characteristic parameters.

[0059] Specifically, after the current-voltage data corresponding to the target on-off data file is parsed, i.e., the data of the current-voltage change between the measured circuit breaker during the on-off process is parsed, the current-voltage data is subjected to feature extraction processing to obtain a plurality of feature parameters. The plurality of feature parameters can reflect the key quantitative indicators of the running state of the measured circuit breaker during the on-off operation.

[0060] Optionally, the S301, parsing the target on-off data file according to the type of the target on-off data file to obtain the current-voltage data corresponding to the target on-off data file, can include: Specifically, the parsing template corresponding to the target on-off data file is determined according to the type of the target on-off data file, and the target on-off data file is parsed based on the parsing template.

[0061] Optionally, a plurality of parsing templates can be pre-set in the monitoring device, each parsing template corresponding to a file type, which can be identified by file extension, header identification field, metadata information, etc. After the type of the target on-off data file is determined, the parsing template corresponding to the type can be loaded according to the identified type, and the target on-off data file is parsed using the parsing template matching the type. The parsed current-voltage data is the data of the current change over time and the data of the voltage change over time.

[0062] For example, the target on-off data file is a.tdms file, which is a binary file format developed by National Instruments (NI) for efficient storage of large amounts of engineering test data, supporting hierarchical structured organization such as groups, channels, attributes, and including various metadata information. The.tdms file can be parsed using an open source or commercial library, such as the National Instruments Technical Data Management Streaming Python (nptdms) library in Python, or by calling the Technical Data Management Streaming API (TDMS API) interface provided by NI.

[0063] For example, the target on-off data file is an.lvm file. The.lvm file is generally a table type data file saved in American Standard Code for Information Interchange (ASCII) text format, has a fixed header comment area and a subsequent data table area, and is commonly used for the output of devices such as oscilloscopes and data acquisition cards. The content follows a certain agreed format, generally including a column title row, a sampling frequency, a channel number, a start time and the like. Therefore, for the.lvm file, a preset format rule can be used to parse the current-voltage data of the target on-off data file.

[0064] In this embodiment, intelligent identification and accurate analysis of multi-source heterogeneous on-off data files are achieved, the information island problem caused by data format incompatibility of the traditional monitoring system is overcome, the integrity, accuracy and time sequence consistency of the current-voltage data are ensured, and subsequent high-order analysis functions are provided.

[0065] Figure 5 A flowchart of a fourth circuit breaker electric life monitoring method provided in the embodiment of the present application is shown in FIG. 4. Figure 5 As shown in FIG. 4, the feature extraction processing of the current-voltage data in S302 above can include the following steps. S401, the current data and the voltage data in the current-voltage data are respectively preprocessed to obtain preprocessed current data and preprocessed voltage data.

[0066] Specifically, the current data can be filtered, for example, low-pass filtering and mean filtering can be included, to suppress noise interference and highlight the dominant trend of the measured circuit breaker in the opening stage. The voltage data can be subjected to mean filtering or sliding window smoothing processing to obtain preprocessed voltage data, which can avoid the misjudgment problem caused by single-point burr.

[0067] S402, the preprocessed voltage data is analyzed to obtain an arc ignition point, and the preprocessed current data is analyzed to obtain an arc extinction point.

[0068] Specifically, when the voltage amplitude in the pre-processed voltage data continuously exceeds the preset arc starting threshold and maintains for a first preset time length, the first time point is taken as the arc starting point. In the current falling stage, if the current value in the pre-processed current data is lower than the preset arc extinguishing threshold and maintains for a second preset time length, the current values of each time point in the second preset time length are all taken as candidate points. In order to avoid misjudgment caused by arc reignition or transient drop, a reverse search strategy is adopted, that is, the last period of time in which the current value is lower than the preset arc extinguishing threshold and maintains for the second preset time length is determined from the position where the current is close to the zero point, and the first time point in the last period of time is taken as the arc ending point.

[0069] S403, determining the arc time, the maximum arc voltage, the thermal effect parameter and the energy integral parameter according to the arc starting point and the arc ending point.

[0070] Specifically, the time between the arc starting point and the arc ending point can be taken as the arc time, and then the maximum arc voltage, that is, the voltage peak value of the arcing device, is determined based on the voltage value between the arc starting point and the arc ending point; the thermal effect parameter is determined according to the current between the arc starting point and the arc ending point, that is, the value obtained by integrating the square of the instantaneous current value of the arcing device over the arc time is taken as the thermal effect parameter, which reflects the heat effect generated by the current passing through the contact, and the larger the value is, the greater the thermal stress on the contact caused by this on-off is. The product of the voltage and the current during the arc is integrated over time to obtain the energy integral, which can directly reflect the energy consumed on the contact during this on-off process, and is an important parameter for measuring electrical wear.

[0071] Optionally, S104, determining the current health degree of the measured circuit breaker corresponding to the target industrial computer according to the plurality of feature parameters and other on-off data files in the data output directory of the target industrial computer, can include: Specifically, the plurality of feature parameters and other on-off data files in the data output directory of the target industrial computer are input into a preset model, and a plurality of sets of to-be-processed data are determined by the preset model, the plurality of sets of to-be-processed data including the plurality of feature parameters and a preset number of historical plurality of feature parameters. The preset model performs prediction analysis on the plurality of sets of to-be-processed data to obtain the current health degree. The preset model can be a gated recurrent unit model, which can process time series data. The health degree can be a health score value of 0-100, and the higher the value of the health degree is, the healthier the measured circuit breaker corresponding to the target industrial computer is, that is, the measured circuit breaker consumes less life; the smaller the value of the health degree is, the closer the measured circuit breaker is to the end of life.

[0072] The other on-off data files refer to a preset number of on-off data files before the target on-off data file, and the historical multiple feature parameters refer to multiple feature parameters obtained according to the other on-off data files before the target on-off data file. The number of the multiple groups of to-be-processed data can be fixed, for example, one on-off data file is added each time, the multiple feature parameters corresponding to the on-off data file of the earliest time in the multiple groups of to-be-processed data are deleted, and the multiple feature parameters corresponding to the added on-off data file are added, so that the sequence length is fixed.

[0073] For example, the target on-off data file is on-off data file A3, the other on-off data files can be on-off data file A1 and on-off data file A2, and the historical multiple feature parameters can be the multiple feature parameters corresponding to on-off data file A1 and the multiple feature parameters corresponding to on-off data file A2. Then, the preset model can perform prediction analysis according to the multiple feature parameters corresponding to on-off data file A1, the multiple feature parameters corresponding to on-off data file A2, and the multiple feature parameters corresponding to on-off data file A3, to obtain the current health degree corresponding to on-off data file A3.

[0074] The preset model can be trained and verified in advance through a large amount of historical experimental data and actual service life measurement results, so as to ensure that the prediction result of the preset model is more accurate, can accurately reflect the real wear procedure of the circuit breaker, and realize the evaluation and trend prediction of the service life state of the circuit breaker.

[0075] Optionally, after S104, determining the current health degree of the measured circuit breaker corresponding to the target industrial personal computer according to the multiple feature parameters and the other on-off data files in the data output directory corresponding to the target industrial personal computer, the above S104 can include the following steps. Specifically, the electrical life change curve of the measured circuit breaker corresponding to the target industrial personal computer can be generated according to the current health degree and the historical health degree corresponding to the target industrial personal computer, and the electrical life change curve is displayed on the display screen.

[0076] The historical health degree corresponding to the target industrial personal computer refers to the health degree corresponding to the other on-off data files before the target on-off data file. For each on-off data file, the preset model can predict the health degree corresponding to the on-off data file. After processing each on-off data file, the health score calculation is updated once to obtain a new health score and an electrical life change curve, and the electrical life change curve of the measured circuit breaker is displayed on the display screen for the user.

[0077] Optionally, if the change of the electrical life curve is a smooth and slow decline, it indicates that the measured circuit breaker is aging normally; if the change of the electrical life curve of the measured circuit breaker is an accelerated decline or the health degree is lower than the health degree threshold, it indicates that the measured circuit breaker may enter accelerated aging or approach the life limit, and warning information is generated.

[0078] Optionally, the safety of the experiment can also be ensured and life anomalies can also be prompted based on multiple conditions. For example, the arc time threshold, arc voltage threshold, single arc energy threshold, health degree threshold, etc. can be set in advance. If the value of any characteristic parameter or the health degree is less than the health degree threshold, warning information can be generated. For example, if the arc time exceeds the arc time threshold range, or the arc voltage exceeds the arc voltage threshold range, or the arc energy integral exceeds the single arc energy threshold range or the health degree is less than the health degree threshold, warning information is generated.

[0079] The warning information may, for example, mark the abnormal data in a preset color or a preset table on the user interface. For example, if the health degree is greater than the health degree threshold, the health degree can be marked red, etc. The alarm information can also be popped up and displayed on the display screen, such as the alarm information "120th time on-off arc energy exceeds the limit", to remind the staff to monitor the state of the circuit breaker or terminate the test. The staff can be prompted by using an alarm sound or an alarm light, such as by using an alarm to emit a sound or an alarm light to turn on to prompt the staff that there is an anomaly.

[0080] Optionally, a report can also be generated for the measured circuit breaker. After the test phase or at the end, the user can click the "export report" button on the display screen, and the monitoring device can automatically summarize the currently monitored data and analysis results to generate a standardized report document. The report can include test overview description, circuit breaker basic information, data acquisition configuration, statistical table of each characteristic parameter, health score curve graph and life trend analysis, abnormal alarm record list, etc. The report file can be in Excel format or PDF format.

[0081] Figure 6 A structural block diagram of a monitoring device 500 provided by an embodiment of the present application is shown in FIG. 5. As shown in FIG. 5, the electronic device can include a processor 501 and a memory 502. Figure 6

[0082] Optionally, a bus 503 can also be included, wherein the memory 502 is configured to store machine readable instructions executable by the processor 501, and the processor 501 and the memory 502 store communicate through the bus 503 when the monitoring device 500 is running. The machine readable instructions are executed by the processor 501 to perform the method steps in the above method embodiments.

[0083] ​The application further provides a non-intrusive monitoring system, comprising the monitoring device, at least one industrial computer and at least one measured circuit breaker in communication connection with each of the industrial computers.

[0084] The monitoring device is used to execute the monitoring method steps of the circuit breaker electric life described in the foregoing specific embodiments.

[0085] The application further provides a computer readable storage medium, which stores a computer program, and the computer program is used to execute the method steps in the foregoing monitoring method embodiments of the circuit breaker electric life when executed by a processor.

[0086] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiments, and will not be described herein again. In the several embodiments provided in the application, it should be understood that the disclosed system, device and method can be implemented by other ways. The device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and the actual implementation can have another division manner, for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed mutual elements can be indirect coupling or communication connection through some communication interfaces, devices or modules, and can be electrical, mechanical or other forms.

[0087] In addition, each functional unit in each embodiment of the application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. When the functions are realized in the form of software functional units and sold or used as independent products, the software functional units can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the application essentially or the parts of the technical solutions that make contributions to the prior art or the parts of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the application. The foregoing storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0088] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A method of monitoring the electrical life of a circuit breaker, characterized by, The application relates to a monitoring device applied to a non-invasive monitoring system, wherein the non-invasive monitoring system comprises the monitoring device, at least one industrial computer and at least one measured circuit breaker in communication connection with each industrial computer; the industrial computer is used for collecting on-off data of the corresponding measured circuit breaker and storing the on-off data into an on-off data file in a data output directory corresponding to the industrial computer; the method comprises the following steps: Real-time monitoring whether a data output directory corresponding to a target industrial computer is updated; If yes, obtaining a target on-off data file currently to be processed in the data output directory, the target industrial computer being any industrial computer in the non-invasive monitoring system, and at least one on-off data file being stored in the data output directory corresponding to the target industrial computer; Analyzing the target on-off data file to obtain a plurality of characteristic parameters corresponding to the target on-off data file; According to the plurality of characteristic parameters and other on-off data files in the data output directory corresponding to the target industrial computer, determining a current health degree of the measured circuit breaker corresponding to the target industrial computer.

2. The method of claim 1, wherein, The real-time monitoring whether the data output directory corresponding to the target industrial computer is updated comprises the following steps: Real-time monitoring, through the network sharing protocol, whether there is a new file in the data output directory corresponding to the target industrial computer, and if yes, determining that the data output directory corresponding to the target industrial computer is updated; When the target industrial computer collects on-off data from the measured circuit breaker connected with the target industrial computer, the industrial computer adds an on-off data file to the data output directory corresponding to the target industrial computer, and saves the collected on-off data into the added on-off data file.

3. The method of claim 1, wherein, The obtaining the target on-off data file currently to be processed in the data output directory comprises the following steps: Obtaining the added on-off data file from the data output directory; Adding the added on-off data file to a to-be-processed data queue of the monitoring device, and taking the first on-off data file in the to-be-processed data queue as the target on-off data file.

4. The method of claim 1, wherein, The analyzing the target on-off data file to obtain the plurality of characteristic parameters corresponding to the target on-off data file comprises the following steps: Analyzing the target on-off data file according to the type of the target on-off data file to obtain current-voltage data corresponding to the target on-off data file; Performing feature extraction processing on the current-voltage data to obtain the plurality of characteristic parameters.

5. The method of claim 4, wherein, The analyzing the target on-off data file according to the type of the target on-off data file comprises the following steps: Determining an analysis template corresponding to the target on-off data file according to the type of the target on-off data file, and analyzing the target on-off data file based on the analysis template.

6. The method of claim 4, wherein, The performing feature extraction processing on the current-voltage data to obtain the plurality of characteristic parameters comprises the following steps: Respectively pre-processing current data and voltage data in the current-voltage data to obtain pre-processed current data and pre-processed voltage data; The pre-processed voltage data is analyzed to obtain an arc ignition point, and the pre-processed current data is analyzed to obtain an arc extinction point; The arc ignition point and the arc extinction point are used to determine an arc time, a maximum arc voltage, a thermal effect parameter, and an energy integral parameter.

7. The method of claim 1, wherein, The current health degree of the target industrial computer corresponding to the measured circuit breaker is determined according to the plurality of characteristic parameters and other on-off data files in the data output directory corresponding to the target industrial computer, including: The plurality of characteristic parameters and other on-off data files in the data output directory of the target industrial computer are input into a preset model, and a plurality of sets of to-be-processed data are determined by the preset model, wherein the plurality of sets of to-be-processed data include the current plurality of characteristic parameters and a preset number of historical plurality of characteristic parameters; The plurality of sets of to-be-processed data are predicted and analyzed by the preset model to obtain the current health degree.

8. The method of claim 1, wherein, After the current health degree of the target industrial computer corresponding to the measured circuit breaker is determined according to the plurality of characteristic parameters and other on-off data files in the data output directory corresponding to the target industrial computer, including: According to the current health degree and the historical health degree corresponding to the target industrial computer, an electrical life change curve of the target industrial computer corresponding to the measured circuit breaker is generated, and the electrical life change curve is displayed on the display screen.

9. A monitoring device, characterized by The circuit breaker electrical life monitoring method comprises a memory and a processor, wherein the memory stores a computer program executable by the processor, and the processor executes the computer program to realize the steps of the circuit breaker electrical life monitoring method according to any one of claims 1-8.

10. A non-invasive monitoring system, characterized by The monitoring device, at least one industrial computer, and at least one measured circuit breaker in communication with each of the industrial computers are included. The monitoring device is used to execute the steps of the circuit breaker electrical life monitoring method according to any one of claims 1-8. ​

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