Protection switch aging monitoring and early warning method and device based on multi-parameter fusion

Abstract

The invention discloses a protection switch aging monitoring and early warning method and device based on multi-parameter fusion, and the method comprises the steps: obtaining a plurality of first switching-on vibration signals when a protection switch is switched on for multiple times; determining a first aging parameter of the protection switch based on the plurality of first closing vibration signals; acquiring an insulating property parameter of an insulating layer of the protection switch; determining a second aging parameter of the protection switch based on the insulation performance parameter; determining a target aging parameter of the protection switch based on the first aging parameter and the second aging parameter; and performing aging early warning based on the target aging parameter. The efficiency of aging state detection of the protection switch can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of smart meters, and specifically relates to a method and device for monitoring and warning of the aging of a protection switch based on multi-parameter fusion. Background Art

[0002] A smart meter is a smart terminal of a smart grid. In addition to having the basic power consumption measurement function of a traditional electric energy meter, in order to adapt to the smart grid and the use of new energy, it also has intelligent functions such as two-way multi-rate metering function, user-side control function, two-way data communication function with multiple data transmission modes, and anti-stealing electricity function. Smart meters represent the development direction of the intelligent terminal of the end user of the future energy-saving smart grid. However, after the protection switch of the smart meter ages, potential safety hazards are likely to occur. The existing technology mainly relies on manual inspection to detect the aging of the protection switch, and the detection efficiency is relatively low.

[0003] That is, the efficiency of detecting the aging state of the protection switch in the existing technology is relatively low. Summary of the Invention

[0004] An embodiment of the present application provides a method and device for monitoring and warning of the aging of a protection switch based on multi-parameter fusion, which can improve the efficiency of detecting the aging state of the protection switch.

[0005] In a first aspect, the method for monitoring and warning of the aging of a protection switch based on multi-parameter fusion provided by the present application includes:

[0006] Obtaining a plurality of first closing vibration signals when the protection switch is closed multiple times;

[0007] Determining a first aging parameter of the protection switch based on the plurality of first closing vibration signals;

[0008] Obtaining an insulation performance parameter of the insulating layer of the protection switch;

[0009] Determining a second aging parameter of the protection switch based on the insulation performance parameter;

[0010] Determining a target aging parameter of the protection switch based on the first aging parameter and the second aging parameter;

[0011] Performing aging warning based on the target aging parameter.

[0012] In an optional embodiment, the first closing vibration signal includes a vibration frequency and a vibration duration, and the determining a first aging parameter of the protection switch based on the plurality of first closing vibration signals includes:

[0013] Obtain the first frequency average value of the vibration frequency in the first closing vibration signals during multiple closings and the duration average value of the vibration duration in the first closing vibration signals during multiple closings;

[0014] Determine a first aging parameter based on the first frequency average value and the duration average value, wherein the smaller the first frequency average value, the larger the first aging parameter, and the higher the duration average value, the larger the first aging parameter.

[0015] In an optional embodiment, the obtaining of multiple first closing vibration signals when the protection switch closes multiple times includes:

[0016] Collect a vibration signal sequence of the protection switch through a vibration sensor on the protection switch, and the vibration signal sequence includes amplitudes at multiple moments;

[0017] Obtain multiple power-off moments of the protection switch;

[0018] Determine the decaying oscillation curve closest to the power-off moment in the vibration signal sequence as the second closing vibration signal corresponding to the power-off moment, and obtain multiple second closing vibration signals corresponding to multiple power-off moments, wherein the decaying oscillation curve is a sine function curve with the amplitude gradually decreasing to zero;

[0019] Screen out multiple first closing vibration signals from multiple second closing vibration signals.

[0020] In an optional embodiment, the screening out of multiple first closing vibration signals from multiple second closing vibration signals includes:

[0021] Judge whether an automatic protection event occurs in the protection circuit within a preset period before the power-off moment, wherein the automatic protection event includes a leakage event, an overload event, and a short-circuit event;

[0022] If an automatic protection event occurs in the protection circuit within a preset period before the power-off moment, then determine the second closing vibration signal corresponding to the power-off moment as the third closing vibration signal, and obtain multiple third closing vibration signals;

[0023] Screen out multiple first closing vibration signals from multiple third closing vibration signals.

[0024] In an optional embodiment, the insulation performance parameter includes leakage currents at multiple moments and dielectric strengths at multiple moments, and the determining of the second aging parameter of the protection switch based on the insulation performance parameter includes:

[0025] Calculate the current average value of leakage currents at multiple moments and the strength average value of dielectric strengths at multiple moments;

[0026] Determine a second aging parameter based on the average value of the current and the average value of the intensity.

[0027] In an optional embodiment, the determining the target aging parameter of the protection switch based on the first aging parameter and the second aging parameter includes:

[0028] Obtain the temperature of the contact of the protection switch through a temperature sensor to obtain a temperature change curve;

[0029] Perform a linear fit on the temperature change curve to obtain a temperature fitting straight line;

[0030] Detect the working current passing through the protection switch through a current sensor to obtain a current change curve;

[0031] Determine a third aging parameter based on the slope of the temperature fitting straight line and the coefficient of variation of the current change curve, wherein the greater the slope of the temperature fitting straight line, the greater the third aging parameter, and the greater the coefficient of variation of the current change curve, the greater the third aging parameter;

[0032] Determine the target aging parameter of the protection switch based on the first aging parameter, the second aging parameter, and the third aging parameter.

[0033] In a second aspect, the protection switch aging monitoring and warning device based on multi-parameter fusion provided by the present application includes:

[0034] A first acquisition module for acquiring a plurality of first closing vibration signals when the protection switch is closed multiple times;

[0035] A first determination module for determining the first aging parameter of the protection switch based on the plurality of first closing vibration signals;

[0036] A second acquisition module for acquiring the insulation performance parameter of the insulation layer of the protection switch;

[0037] A second determination module for determining the second aging parameter of the protection switch based on the insulation performance parameter;

[0038] A third determination module for determining the target aging parameter of the protection switch based on the first aging parameter and the second aging parameter;

[0039] An early warning module for performing aging early warning based on the target aging parameter.

[0040] In an optional embodiment, the first closing vibration signal includes a vibration frequency and a vibration duration, and the determining the first aging parameter of the protection switch based on the plurality of first closing vibration signals includes:

[0041] Obtain the first frequency average value of the vibration frequency in the first closing vibration signals during multiple closings and the average duration of the vibration duration in the first closing vibration signals during multiple closings;

[0042] Determine a first aging parameter based on the first frequency average value and the average duration, wherein the smaller the first frequency average value, the larger the first aging parameter, and the higher the average duration, the larger the first aging parameter.

[0043] In an optional embodiment, the obtaining of multiple first closing vibration signals when the protection switch is closed multiple times includes:

[0044] Collect a vibration signal sequence of the protection switch through a vibration sensor on the protection switch, and the vibration signal sequence includes amplitudes at multiple moments;

[0045] Obtain multiple power-off moments of the protection switch;

[0046] Determine the decay oscillation curve closest to the power-off moment in the vibration signal sequence as the second closing vibration signal corresponding to the power-off moment, and obtain multiple second closing vibration signals corresponding to multiple power-off moments, wherein the decay oscillation curve is a sine function curve with the amplitude gradually decreasing to zero;

[0047] Screen out multiple first closing vibration signals from multiple second closing vibration signals.

[0048] In an optional embodiment, the screening out of multiple first closing vibration signals from multiple second closing vibration signals includes:

[0049] Judge whether an automatic protection event occurs in the protection circuit within a preset period before the power-off moment, wherein the automatic protection event includes a leakage time, an overload event, and a short-circuit time;

[0050] If an automatic protection event occurs in the protection circuit within a preset period before the power-off moment, determine the second closing vibration signal corresponding to the power-off moment as the third closing vibration signal, and obtain multiple third closing vibration signals;

[0051] Screen out multiple first closing vibration signals from multiple third closing vibration signals.

[0052] In an optional embodiment, the insulation performance parameter includes leakage currents at multiple moments and dielectric strengths at multiple moments, and the determining of the second aging parameter of the protection switch based on the insulation performance parameter includes:

[0053] Calculate the average current value of leakage currents at multiple moments and the average strength value of dielectric strengths at multiple moments;

[0054] Determine a second aging parameter based on the average value of the current and the average value of the intensity.

[0055] In an optional embodiment, the determining the target aging parameter of the protection switch based on the first aging parameter and the second aging parameter includes:

[0056] Obtain the temperature of the contact of the protection switch through a temperature sensor to obtain a temperature change curve;

[0057] Perform linear fitting on the temperature change curve to obtain a temperature fitting straight line;

[0058] Detect the working current passing through the protection switch through a current sensor to obtain a current change curve;

[0059] Determine a third aging parameter based on the slope of the temperature fitting straight line and the coefficient of variation of the current change curve, wherein the greater the slope of the temperature fitting straight line, the greater the third aging parameter, and the greater the coefficient of variation of the current change curve, the greater the third aging parameter;

[0060] Determine the target aging parameter of the protection switch based on the first aging parameter, the second aging parameter, and the third aging parameter.

[0061] In a third aspect, the electronic device provided in the present application includes a memory and a processor. The memory stores a computer program, and the processor is configured to run the computer program in the memory to implement the steps in the method for monitoring and warning the aging of a protection switch based on multi-parameter fusion provided in the present application.

[0062] In a fourth aspect, the computer-readable storage medium provided in the present application stores multiple instructions, and these instructions are suitable for being loaded by a processor to implement the steps in the method for monitoring and warning the aging of a protection switch based on multi-parameter fusion provided in the present application.

[0063] In a fifth aspect, the computer program product provided in the present application includes a computer program or instructions, and when the computer program or instructions are executed by a processor, the steps in the method for monitoring and warning the aging of a protection switch based on multi-parameter fusion provided in the present application are implemented.

[0064] In the present application, compared with the related art, multiple first closing vibration signals when the protection switch is closed multiple times are obtained; a first aging parameter of the protection switch is determined based on the multiple first closing vibration signals; an insulation performance parameter of the insulation layer of the protection switch is obtained; a second aging parameter of the protection switch is determined based on the insulation performance parameter; a target aging parameter of the protection switch is determined based on the first aging parameter and the second aging parameter; and aging warning is performed based on the target aging parameter. The present application can improve the efficiency of detecting the aging state of the protection switch. Description of the Drawings

[0065] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0066] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0067] Figure 1 is a schematic diagram of the scenario of the protection switch aging monitoring and early warning system based on multi-parameter fusion provided by the embodiments of the present application;

[0068] Figure 2 is a schematic flowchart of an embodiment of the method for protecting switch aging monitoring and early warning based on multi-parameter fusion provided by the embodiments of the present application;

[0069] Figure 3 is a schematic structural diagram of an embodiment of the device for protecting switch aging monitoring and early warning based on multi-parameter fusion provided by the embodiments of the present application;

[0070] Figure 4 is a schematic structural diagram of the electronic device provided by the embodiments of the present application. Detailed implementation manners

[0071] It should be noted that the principle of the present application is illustrated by way of example in a suitable computing environment. The following description is based on the specific embodiments of the present application illustrated, and it should not be regarded as limiting other specific embodiments of the present application not detailed herein.

[0072] In the following description of the present application, the reference to "some embodiments" describes a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0073] In the following description of the present application, the terms "first / second / third" are only used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first / second / third" can be interchanged with a specific order or sequence when allowed, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein are for the purpose of describing embodiments of this application only and are not intended to limit this application.

[0075] In order to improve the effect of aging monitoring and early warning of a protection switch based on multi-parameter fusion, embodiments of this application provide a method for aging monitoring and early warning of a protection switch based on multi-parameter fusion, an apparatus for aging monitoring and early warning of a protection switch based on multi-parameter fusion, an electronic device, a computer-readable storage medium, and a computer program product. Among them, the method for aging monitoring and early warning of a protection switch based on multi-parameter fusion can be executed by the apparatus for aging monitoring and early warning of a protection switch based on multi-parameter fusion, or by an electronic device integrated with the apparatus for aging monitoring and early warning of a protection switch based on multi-parameter fusion.

[0076] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of this application.

[0077] Please refer to Figure 1 , this application also provides an aging monitoring and early warning system for a protection switch based on multi-parameter fusion. As Figure 1 shown, the aging monitoring and early warning system for a protection switch based on multi-parameter fusion includes an electronic device. The electronic device integrates the apparatus for aging monitoring and early warning of a protection switch based on multi-parameter fusion provided by this application.

[0078] Among them, the electronic device can be any device configured with a processor and having processing capabilities, such as a mobile electronic device with a processor such as a smart phone, a tablet computer, a handheld computer, a notebook computer, a smart speaker, or a fixed electronic device with a processor such as a desktop computer, a television, a server, an industrial device.

[0079] In addition, as Figure 1 shown, the aging monitoring and early warning system for a protection switch based on multi-parameter fusion may also include a memory for storing the original data, intermediate data, and result data during audio processing.

[0080] In the embodiments of the present application, the memory may be a cloud memory. Cloud storage is a new concept extended and developed from the concept of cloud computing. A distributed cloud storage system (hereinafter referred to as the storage system) refers to a storage system that combines a large number of different types of storage devices (storage devices are also called storage nodes) in the network through functions such as cluster applications, grid technology, and distributed file systems, and collaborates through application software or application interfaces to jointly provide data storage and service access functions to the outside world.

[0081] Currently, the storage method of the storage system is as follows: Create a logical volume. When creating a logical volume, physical storage space is allocated for each logical volume. This physical storage space may be composed of a disk of a certain storage device or several storage devices. The client stores data on a certain logical volume, that is, stores the data on the file system. The file system divides the data into many parts, and each part is an object. The object not only contains the data but also contains additional information such as data identification (ID entity, ID). The file system writes each object into the physical storage space of the logical volume respectively, and the file system will record the storage location information of each object. Thus, when the client requests to access the data, the file system can enable the client to access the data according to the storage location information of each object.

[0082] The process of the storage system allocating physical storage space for a logical volume is specifically as follows: According to the capacity estimation of the objects stored in the logical volume (this estimation often has a large margin relative to the capacity of the objects to be actually stored) and the group of the Redundant Array of Independent Disk (RAID), the physical storage space is pre-divided into stripes. A logical volume can be understood as a stripe, thereby allocating physical storage space for the logical volume.

[0083] It should be noted that Figure 1 The scenario schematic diagram of the protection switch aging monitoring and warning system based on multi-parameter fusion shown is only an example. The protection switch aging monitoring and warning system and scenarios described in the embodiments of the present application are to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art know that with the evolution of the protection switch aging monitoring and warning system based on multi-parameter fusion and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0084] The following will be described in detail respectively. It should be noted that the serial numbers of the following embodiments do not limit the preferred order of the embodiments.

[0085] Please refer toFigure 2 , Figure 2 is a schematic flowchart of an embodiment of the protection switch aging monitoring and warning method based on multi-parameter fusion provided by an embodiment of the present application. As Figure 2 shown, the process of the protection switch aging monitoring and warning method based on multi-parameter fusion provided by the present application is as follows:

[0086] 201. Obtain multiple first closing vibration signals when the protection switch is closed multiple times.

[0087] In the embodiment of the present application, obtaining multiple first closing vibration signals when the protection switch is closed multiple times includes:

[0088] (1) Collect the vibration signal sequence of the protection switch through the vibration sensor on the protection switch. The vibration signal sequence includes the amplitudes at multiple moments.

[0089] (2) Obtain multiple power-off moments of the protection switch.

[0090] Among them, the power-off moment is the moment when the circuit protected by the protection switch is powered off.

[0091] (3) Determine the decaying oscillation curve closest to the power-off moment in the vibration signal sequence as the second closing vibration signal corresponding to the power-off moment, and obtain multiple second closing vibration signals corresponding to multiple power-off moments.

[0092] Among them, the decaying oscillation curve is a sine function curve with the amplitude gradually decreasing to zero.

[0093] In the embodiment of the present application, obtain the moment with the maximum amplitude when the amplitude of the decaying oscillation curve is the largest, and determine the decaying oscillation curve corresponding to the moment with the maximum amplitude closest to the power-off moment as the decaying oscillation curve closest to the power-off moment.

[0094] (4) Screen out multiple first closing vibration signals from multiple second closing vibration signals.

[0095] In a specific embodiment, randomly screen out multiple first closing vibration signals from multiple second closing vibration signals.

[0096] Since the closing can be manual operation or automatic closing, and manual pressing of the protection switch during manual operation will affect the vibration. To avoid this influence, in another specific embodiment, screening out multiple first closing vibration signals from multiple second closing vibration signals includes:

[0097] Step 1-1, determine whether an automatic protection event occurs in the preset time period before the power-off moment. Among them, the automatic protection event includes leakage time, overload event, and short-circuit time.

[0098] Step 1-2, if an automatic protection event occurs in the protection circuit within a preset period before the power-off moment, then determine the second closing vibration signal corresponding to the power-off moment as the third closing vibration signal, and obtain a plurality of third closing vibration signals.

[0099] Step 1-3, screen out a plurality of first closing vibration signals from the plurality of third closing vibration signals.

[0100] In a specific embodiment, screen out a plurality of first closing vibration signals from the plurality of third closing vibration signals.

[0101] In another specific embodiment, cluster the plurality of third closing vibration signals to obtain a plurality of signal clusters; determine the plurality of third closing vibration signals in the signal cluster with the largest number of vibration signals among the plurality of signal clusters as the plurality of first closing vibration signals.

[0102] 202. Determine the first aging parameter of the protection switch based on the plurality of first closing vibration signals.

[0103] In the embodiment of the present application, the first closing vibration signal includes a vibration frequency and a vibration duration. Determining the first aging parameter of the protection switch based on the plurality of first closing vibration signals includes:

[0104] (1) Obtain the first frequency average value of the vibration frequencies in the first closing vibration signals during multiple closings and the duration average value of the vibration durations in the first closing vibration signals during multiple closings.

[0105] (2) Determine the first aging parameter based on the first frequency average value and the duration average value, where the smaller the first frequency average value, the larger the first aging parameter, and the higher the duration average value, the larger the first aging parameter.

[0106] In a specific embodiment, first, collect a series of sample values of frequency and duration in the relevant data. For the frequency data, calculate its average value to obtain the first frequency average value, and for the duration data, also calculate its average value to obtain the duration average value. For example, the first aging parameter = k1 / the first frequency average value + k2 * the duration average value, where k1 and k2 are weight coefficients preset according to the actual situation and data characteristics, and are used to adjust the relative degree of the influence of frequency and duration on the first aging parameter.

[0107] Suppose the operating data collected over a period of time has frequency values of 2 Hz, 3 Hz, and 4 Hz respectively, and duration values of 5 hours, 6 hours, and 7 hours respectively. First, calculate the first frequency average, that is, (2 + 3 + 4) / 3 = 3 Hz, and the duration average is (5 + 6 + 7) / 3 = 6 hours. If k1 = 10 and k2 = 2 are preset, according to the above formula, the first aging parameter = 10 / 3 + 2 * 6 ≈ 3.33 + 12 = 15.33. When the frequency average becomes 2 Hz and other conditions remain unchanged, the first aging parameter = 10 / 2 + 2 * 6 = 5 + 12 = 17. It can be seen that as the first frequency average becomes smaller, the first aging parameter increases; if the duration average becomes 8 hours and the frequency average is still 3 Hz, the first aging parameter = 10 / 3 + 2 * 8 ≈ 3.33 + 16 = 19.33, indicating that as the duration average increases, the first aging parameter also increases.

[0108] 203. Obtain the insulation performance parameters of the insulating layer of the protection switch.

[0109] In the embodiments of the present application, the insulation performance parameters include leakage currents at multiple moments and dielectric strengths at multiple moments. The fact that an insulator does not conduct electricity is only relative. With the change of the peripheral environmental conditions, in fact, there is no insulating material that is absolutely non-conductive. For any insulating material, when a voltage is applied across its two ends, there will always be a certain current passing through. The active component of this current is called the leakage current, and this phenomenon is called the leakage of the insulator. The leakage current is actually the current flowing through the insulating part of an electrical circuit or device without faults and under the action of an applied voltage. The leakage current refers to the extremely small current generated between the live wire and the neutral wire of an electrical appliance during normal operation, which is equivalent to the static electricity of a general electrical appliance. When testing, a leakage current tester is used, mainly to test its L pole and N pole. The dielectric strength is a measure of the electrical strength of a material as an insulator. It is defined as the maximum voltage per unit thickness that the specimen can withstand when it is broken down, expressed as volts per unit thickness. The greater the dielectric strength of a substance, the better its quality as an insulator.

[0110] 204. Determine the second aging parameter of the protection switch based on the insulation performance parameters.

[0111] In the embodiments of the present application, the insulation performance parameters include leakage currents at multiple moments and dielectric strengths at multiple moments. Calculate the current average of the leakage currents at multiple moments and the strength average of the dielectric strengths at multiple moments; determine the second aging parameter based on the current average and the strength average. Among them, the greater the current average, the smaller the second aging parameter, and the greater the strength average, the greater the second aging parameter.

[0112] In a specific embodiment, multiple groups of data samples related to current and intensity are collected first. For the current data, its average value is calculated as the average current; for the intensity data, the average value is calculated as the average intensity. The second aging parameter = k3 * average intensity - k4 / average current, where k3 and k4 are weight coefficients preset according to the actual scenario and data characteristics, and they determine the weight of the influence of intensity and current on the second aging parameter.

[0113] Suppose there is a set of data when a group of devices are working, the leakage currents are 3A, 4A, and 5A respectively, and the dielectric strengths are 8, 9, and 10 respectively. First, calculate the average current as (3 + 4 + 5) / 3 = 4A, and the average intensity as (8 + 9 + 10) / 3 = 9. If k3 = 3 and k4 = 6 are set in advance, according to the above formula, the second aging parameter = 3 * 9 - 6 / 4 = 27 - 1.5 = 25.5. When the average current becomes 5A and other conditions remain unchanged, the second aging parameter = 3 * 9 - 6 / 5 = 27 - 1.2 = 25.8. It can be seen that when the average current increases, the second aging parameter becomes smaller; if the average intensity becomes 11 and the average current is still 4A, the second aging parameter = 3 * 11 - 6 / 4 = 33 - 1.5 = 31.5, indicating that when the average intensity increases, the second aging parameter increases.

[0114] 205. Determine the target aging parameter of the protection switch based on the first aging parameter and the second aging parameter.

[0115] Among them, the larger the first aging parameter, the larger the target aging parameter of the protection switch, and the larger the second aging parameter, the larger the target aging parameter of the protection switch.

[0116] In a specific embodiment, the first aging parameter and the second aging parameter are weighted and summed to obtain the target aging parameter of the protection switch.

[0117] In another specific embodiment, determining the target aging parameter of the protection switch based on the first aging parameter and the second aging parameter includes:

[0118] (1) Obtain the temperature of the contacts of the protection switch through a temperature sensor to obtain a temperature change curve.

[0119] (2) Perform linear fitting on the temperature change curve to obtain a temperature fitting line.

[0120] (3) Detect the working current passing through the protection switch through a current sensor to obtain a current change curve.

[0121] Among them, the working current of the protection switch is the current when the protection switch works normally. The sampling frequency is optimized according to the change speed of key components. For example, the sampling frequency of the temperature sensor is 1Hz, and the sampling frequency of the vibration sensor is 10Hz.

[0122] (4) Determine a third aging parameter based on the slope of the temperature fitting line and the coefficient of variation of the current change curve. Among them, the greater the slope of the temperature fitting line, the greater the third aging parameter; the greater the coefficient of variation of the current change curve, the greater the third aging parameter.

[0123] In a specific embodiment, first, for the temperature data, use methods such as linear regression to fit a straight line of temperature change over time, and then calculate the slope of this straight line. For the current data, calculate the coefficient of variation of its change curve. The coefficient of variation can be obtained by first finding the standard deviation of the current data and then dividing it by the average current. The third aging parameter = k5 * the slope of the temperature fitting line + k6 * the coefficient of variation of the current change curve, where k5 and k6 are weight coefficients preset according to the actual application scenario and data characteristics, and are used to regulate the degree of influence of the temperature slope and the current coefficient of variation on the third aging parameter.

[0124] Suppose a certain device is monitored, and the recorded temperature data within a period of time are (1 hour, 25 °C), (2 hours, 28 °C), (3 hours, 31 °C) respectively. The slope of the temperature fitting line obtained by linear regression fitting is 3 °C / hour. At the same time, the recorded current data are 3A, 4A, 5A, 4A, 3A. First, calculate the average current as (3 + 4 + 5 + 4 + 3) / 5 = 3.8A, and then calculate the standard deviation to be approximately 0.75A. Then the coefficient of variation of the current change curve is 0.75 ÷ 3.8 ≈ 0.197. If k5 = 2 and k6 = 10 are preset, according to the formula, the third aging parameter = 2 * 3 + 10 * 0.197 = 6 + 1.97 = 7.97. When the slope of the temperature fitting line becomes 4 °C / hour and other conditions remain unchanged, the third aging parameter = 2 * 4 + 10 * 0.197 = 8 + 1.97 = 9.97, which reflects that as the slope of the temperature fitting line increases, the third aging parameter increases; if the coefficient of variation of the current change curve becomes 0.25 and the temperature slope is still 3 °C / hour, the third aging parameter = 2 * 3 + 10 * 0.25 = 6 + 2.5 = 8.5, indicating that as the coefficient of variation of the current change curve increases, the third aging parameter also increases.

[0125] (5) Determine the target aging parameter of the protection switch based on the first aging parameter, the second aging parameter, and the third aging parameter.

[0126] In a specific embodiment, perform a weighted sum of the first aging parameter, the second aging parameter, and the third aging parameter to obtain the target aging parameter of the protection switch.

[0127] Specifically, the target aging parameter = w1 * the first aging parameter + w2 * the second aging parameter + w3 * the third aging parameter, where w1, w2, and w3 are the weight coefficients of the first aging parameter, the second aging parameter, and the third aging parameter respectively. These weight coefficients need to be reasonably set according to actual situations, such as the importance of each parameter to the aging of the protection switch and other factors, and w1 + w2 + w3 = 1 to ensure that the contributions of each parameter to the target aging parameter are within a reasonable range. Suppose the first aging parameter is 15.33, the second aging parameter is 25.5, and the third aging parameter is 7.97. According to actual experience and relevant analysis, we determine that w1 = 0.3, w2 = 0.5, and w3 = 0.2. Then, according to the above formula, the target aging parameter of the protection switch can be calculated as = 0.3 * 15.33 + 0.5 * 25.5 + 0.2 * 7.97 = 4.6 + 12.75 + 1.594 = 18.944.

[0128] In another specific embodiment, determining the target aging parameter of the protection switch based on the first aging parameter, the second aging parameter, and the third aging parameter includes:

[0129] (1) Obtain the closing time when the closing signal was received closest to the power-off time before the power-off time of the protection switch.

[0130] (2) Determine the time difference between the closing time and the power-off time as the first turn-off delay time corresponding to the power-off time.

[0131] (3) Determine the target turn-off delay time based on the first turn-off delay time.

[0132] In a specific embodiment, the first turn-off delay time is determined as the target turn-off delay time.

[0133] In another specific embodiment, obtain the second turn-off delay time obtained by measuring the protection switch. Determine the target turn-off delay time based on the first turn-off delay time and the second turn-off delay time. Specifically, the average value of the first turn-off delay time and the second turn-off delay time is determined as the target turn-off delay time.

[0134] In a specific embodiment, the protection switch includes an insulated gate bipolar transistor. The protection switch includes a gate, a collector, an emitter, and a chip. The protection switch is turned off by applying a reverse voltage. When triggered by a reverse voltage pulse, the gate drive current is quickly established, and the voltage between the gate and the emitter begins to drop until the Miller plateau voltage. After the voltage between the gate and the emitter drops to the Miller plateau voltage, a depletion layer begins to form under the gate. At this time, the carrier concentration in the gate region is still high and evenly distributed. After the depletion layer in the gate region is completely formed, it begins to expand towards the collector, and the voltage between the collector and the emitter rises rapidly. Apply a DC voltage to the protection switch, measure each measurement parameter of the protection switch, and determine the second turn-off delay time T based on each measurement parameter and each period parameter. g 。

[0135] Among them, the second turn-off delay time T g is calculated as follows:

[0136]

[0137] Among them, R g is the built-in drive resistance of the chip, C gc is the parasitic capacitance between the gate and the collector, C ge is the parasitic capacitance between the gate and the emitter, u gon is the gate drive voltage, u goff is the gate turn-off voltage, u gp is the Miller plateau voltage, W c is the depletion layer width, J e is the change in the gate electron current density, T is the junction temperature, q is the unit charge amount, n e is the carrier concentration, S a is the carrier concentration, U dc is the DC voltage, v sat is the saturation migration rate of the carriers, J e is the decrease in the electron current in the MOS channel under the gate region, g m is the transconductance value of the protection switch, u ge is the change in the gate-emitter voltage.

[0138] (4) Determine the fourth aging parameter based on the target turn-off delay time. Among them, the larger the target turn-off delay time, the larger the fourth aging parameter.

[0139] Specifically, determine the target turn-off delay time as the fourth aging parameter.

[0140] (5) Determine the target aging parameter of the protection switch based on the first aging parameter, the second aging parameter, the third aging parameter, and the fourth aging parameter.

[0141] Specifically, the target aging parameter = w1 * the first aging parameter + w2 * the second aging parameter + w3 * the third aging parameter + w4 * the fourth aging parameter, where w1, w2, w3, and w4 are the weight coefficients of the first aging parameter, the second aging parameter, the third aging parameter, and the fourth aging parameter, respectively. These weight coefficients need to be reasonably set according to actual situations, such as the importance of each parameter to the aging of the protection switch and other factors, and w1 + w2 + w3 + w4 = 1 to ensure that the contributions of each parameter to the target aging parameter are within a reasonable range. For example, w1 = 0.1, w2 = 0.3, w3 = 0.4, w4 = 0.2.

[0142] Among them, the larger the first aging parameter, the larger the target aging parameter of the protection switch; the larger the second aging parameter, the larger the target aging parameter of the protection switch; the larger the third aging parameter, the larger the target aging parameter of the protection switch; the larger the fourth aging parameter, the larger the target aging parameter of the protection switch.

[0143] In a specific embodiment, the first aging parameter, the second aging parameter, the third aging parameter, and the fourth aging parameter are weighted and summed to obtain the target aging parameter of the protection switch.

[0144] 206. Perform aging warning based on the target aging parameter.

[0145] In a specific embodiment, four aging levels are divided, and different aging levels correspond to different parameter ranges. The four aging levels are "normal aging level", "mild aging level", "moderate aging level", and "severe aging level". If the target aging parameter belongs to the mild aging level, the user is prompted to pay attention to the device status. If the target aging parameter belongs to the moderate aging level, the user is advised to check and maintain the device. If the target aging parameter belongs to the severe aging level, the user is prompted to immediately replace the switch to avoid safety accidents.

[0146] Compared with the related technology, multiple first closing vibration signals of the protection switch during multiple closings are obtained; the first aging parameter of the protection switch is determined based on the multiple first closing vibration signals; the insulation performance parameter of the insulation layer of the protection switch is obtained; the second aging parameter of the protection switch is determined based on the insulation performance parameter; the target aging parameter of the protection switch is determined based on the first aging parameter and the second aging parameter; and aging warning is performed based on the target aging parameter. The present application can improve the efficiency of detecting the aging state of the protection switch.

[0147] To facilitate better implementation of the protection switch aging monitoring and warning method based on multi-parameter fusion provided by the embodiments of the present application, the embodiments of the present application further provide a protection switch aging monitoring and warning device based on multi-parameter fusion for the above-mentioned protection switch aging monitoring and warning method based on multi-parameter fusion. The meanings of the nouns are the same as those in the above-mentioned protection switch aging monitoring and warning method based on multi-parameter fusion. For specific implementation details, please refer to the descriptions in the above method embodiments.

[0148] Please refer to Figure 3 , Figure 3 FIG. is a schematic structural diagram of an embodiment of a protection switch aging monitoring and warning device based on multi-parameter fusion provided by the embodiments of the present application. The protection switch aging monitoring and warning device based on multi-parameter fusion may include a first acquisition module 701, a first determination module 702, a second acquisition module 703, a second determination module 704, a third determination module 705, and a warning module 706. Among them,

[0149] The first acquisition module 701 is configured to acquire a plurality of first closing vibration signals when the protection switch is closed multiple times;

[0150] The first determination module 702 is configured to determine a first aging parameter of the protection switch based on the plurality of first closing vibration signals;

[0151] The second acquisition module 703 is configured to acquire insulation performance parameters of the insulation layer of the protection switch;

[0152] The second determination module 704 is configured to determine a second aging parameter of the protection switch based on the insulation performance parameters;

[0153] The third determination module 705 is configured to determine a target aging parameter of the protection switch based on the first aging parameter and the second aging parameter;

[0154] The warning module 706 is configured to perform aging warning based on the target aging parameter.

[0155] In an optional embodiment, the first closing vibration signal includes a vibration frequency and a vibration duration. Determining the first aging parameter of the protection switch based on the plurality of first closing vibration signals includes:

[0156] Acquiring a first frequency average value of the vibration frequency in the first closing vibration signals when closing multiple times and a duration average value of the vibration duration in the first closing vibration signals when closing multiple times;

[0157] Determining a first aging parameter based on the first frequency average value and the duration average value, where the smaller the first frequency average value, the larger the first aging parameter, and the higher the duration average value, the larger the first aging parameter.

[0158] In an optional embodiment, obtaining a plurality of first closing vibration signals when the protection switch closes multiple times includes:

[0159] Collecting a vibration signal sequence of the protection switch through a vibration sensor on the protection switch, where the vibration signal sequence includes amplitudes at multiple moments;

[0160] Obtaining a plurality of power-off moments of the protection switch;

[0161] Determining the decaying oscillation curve closest to the power-off moment in the vibration signal sequence as the second closing vibration signal corresponding to the power-off moment, and obtaining a plurality of the second closing vibration signals corresponding to the plurality of power-off moments, where the decaying oscillation curve is a sine function curve with an amplitude gradually decreasing to zero;

[0162] Screening out a plurality of the first closing vibration signals from the plurality of the second closing vibration signals.

[0163] In an optional embodiment, screening out a plurality of the first closing vibration signals from the plurality of the second closing vibration signals includes:

[0164] Judging whether an automatic protection event occurs in the protection circuit within a preset period before the power-off moment, where the automatic protection event includes a leakage event, an overload event, and a short-circuit event;

[0165] If an automatic protection event occurs in the protection circuit within a preset period before the power-off moment, determining the second closing vibration signal corresponding to the power-off moment as the third closing vibration signal, and obtaining a plurality of the third closing vibration signals;

[0166] Screening out a plurality of the first closing vibration signals from the plurality of the third closing vibration signals.

[0167] In an optional embodiment, the insulation performance parameters include leakage currents at multiple moments and dielectric strengths at multiple moments. Determining the second aging parameter of the protection switch based on the insulation performance parameters includes:

[0168] Calculating the average current value of the leakage currents at multiple moments and the average strength value of the dielectric strengths at multiple moments;

[0169] Determining the second aging parameter based on the average current value and the average strength value.

[0170] In an optional embodiment, determining the target aging parameter of the protection switch based on the first aging parameter and the second aging parameter includes:

[0171] Obtain the temperature of the contact of the protection switch through a temperature sensor to obtain a temperature change curve;

[0172] Perform linear fitting on the temperature change curve to obtain a temperature fitting line;

[0173] Detect the operating current passing through the protection switch through a current sensor to obtain a current change curve;

[0174] Determine a third aging parameter based on the slope of the temperature fitting line and the coefficient of variation of the current change curve. Among them, the greater the slope of the temperature fitting line, the greater the third aging parameter, and the greater the coefficient of variation of the current change curve, the greater the third aging parameter;

[0175] Determine the target aging parameter of the protection switch based on the first aging parameter, the second aging parameter, and the third aging parameter.

[0176] For the specific implementation of each of the above modules, reference may be made to the previous embodiments, which will not be elaborated here.

[0177] Compared with the related art, obtain multiple first closing vibration signals when the protection switch is closed multiple times; determine the first aging parameter of the protection switch based on the multiple first closing vibration signals; obtain the insulation performance parameter of the insulation layer of the protection switch; determine the second aging parameter of the protection switch based on the insulation performance parameter; determine the target aging parameter of the protection switch based on the first aging parameter and the second aging parameter; perform aging warning based on the target aging parameter. This application can improve the efficiency of detecting the aging state of the protection switch.

[0178] Please refer to Figure 4 , Figure 4 which is a schematic structural diagram of the electronic device provided by the embodiment of the present application.

[0179] The electronic device may include a processor 101 with one or more processing cores, a memory 102 with one or more computer-readable storage media, a power supply 103, an input unit 104 and other components. Those skilled in the art can understand that the structural diagram of the electronic device shown in the figure does not constitute a limitation on the electronic device, and it may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements. Among them:

[0180] The processor 101 is the control center of the electronic device, connecting various parts of the entire electronic device through various interfaces and circuits. By running or executing software programs and / or modules stored in the memory 102, and by invoking the data stored in the memory 102, it executes various functions of the electronic device and processes data. Optionally, the processor 101 may include one or more processing cores; optionally, the processor 101 may integrate an application processor and a modem processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor may not be integrated into the processor 101 either.

[0181] The memory 102 can be used to store software programs and modules. The processor 101 executes various functional applications and data processing by running the software programs and modules stored in the memory 102. The memory 102 mainly includes a program storage area and a data storage area. Among them, the program storage area can store the operating system, application programs required for at least one function (such as the sound playback function, image playback function, etc.); the data storage area can store data created according to the use of the electronic device. In addition, the memory 102 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage devices. Correspondingly, the memory 102 may also include a memory controller to provide the processor 101 with access to the memory 102.

[0182] The electronic device further includes a power supply 103 that powers each component. Optionally, the power supply 103 may be logically connected to the processor 101 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. The power supply 103 may also include any element such as one or more DC or AC power supplies, a recharge system, a power failure detection circuit, a power converter or inverter, and a power status indicator.

[0183] The electronic device may further include an input unit 104, which can be used to receive input digital or character information, and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls.

[0184] Although not shown, the electronic device may further include a display unit, an image acquisition element, etc., which will not be elaborated here. Specifically, in this embodiment, the processor 101 in the electronic device will load the executable code corresponding to one or more computer programs into the memory 102 according to the following instructions, and the processor 101 will execute the steps in the method for monitoring and warning the aging of protection switches based on multi-parameter fusion provided by this application, such as:

[0185] Compared with the related art, obtain multiple first closing vibration signals when the protection switch is closed multiple times; determine the first aging parameter of the protection switch based on the multiple first closing vibration signals; obtain the insulation performance parameter of the insulating layer of the protection switch; determine the second aging parameter of the protection switch based on the insulation performance parameter; determine the target aging parameter of the protection switch based on the first aging parameter and the second aging parameter; and perform aging warning based on the target aging parameter.

[0186] It should be noted that the electronic device provided in the embodiments of the present application and the method for monitoring and warning the aging of the protection switch based on multi-parameter fusion in the above embodiments belong to the same concept. The specific implementation process is detailed in the above related embodiments and will not be repeated here.

[0187] The present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program stored thereon is executed by the processor of the electronic device provided in the embodiments of the present application, the processor of the electronic device is caused to execute the steps in the method for monitoring and warning the aging of the protection switch based on multi-parameter fusion provided by the present application. Among them, the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), etc.

[0188] The present application also provides a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes various optional implementation manners of the above method for monitoring and warning the aging of the protection switch based on multi-parameter fusion.

[0189] The above has introduced in detail a method and device for monitoring and warning the aging of a protection switch based on multi-parameter fusion provided by the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

[0190] It should be noted that when the above embodiments of the present application are applied to specific products or technologies, it involves relevant data of users, and user permission or consent needs to be obtained. Moreover, the collection, use, and processing of relevant data need to comply with relevant laws, regulations, and standards in relevant countries and regions.

Claims

1. A protection switch aging monitoring and early warning method based on multi-parameter fusion, characterized in that The protection switch aging monitoring and warning method based on multi-parameter fusion includes: Obtaining a plurality of first closing vibration signals when the protection switch closes multiple times; Determining a first aging parameter of the protection switch based on the plurality of first closing vibration signals; Obtaining the insulation performance parameters of the insulation layer of the protection switch; Determining a second aging parameter of the protection switch based on the insulation performance parameters; Determining a target aging parameter of the protection switch based on the first aging parameter and the second aging parameter; Performing aging warning based on the target aging parameter.

2. The protection switch aging monitoring and early warning method based on multi-parameter fusion according to claim 1, characterized in that The first closing vibration signal includes a vibration frequency and a vibration duration. Determining the first aging parameter of the protection switch based on the plurality of first closing vibration signals includes: Obtaining a first frequency average value of the vibration frequencies in the first closing vibration signals when closing multiple times and a duration average value of the vibration durations in the first closing vibration signals when closing multiple times; Determining a first aging parameter based on the first frequency average value and the duration average value, where the smaller the first frequency average value, the larger the first aging parameter, and the higher the duration average value, the larger the first aging parameter.

3. The protection switch aging monitoring and early warning method based on multi-parameter fusion according to claim 2, characterized in that Obtaining a plurality of first closing vibration signals when the protection switch closes multiple times includes: Collecting a vibration signal sequence of the protection switch through a vibration sensor on the protection switch, where the vibration signal sequence includes amplitudes at multiple moments; Obtaining a plurality of power-off moments of the protection switch; Determining the decaying oscillation curve closest to the power-off moment in the vibration signal sequence as the second closing vibration signal corresponding to the power-off moment, and obtaining a plurality of second closing vibration signals corresponding to the plurality of power-off moments, where the decaying oscillation curve is a sine function curve with the amplitude gradually decreasing to zero; Selecting a plurality of first closing vibration signals from the plurality of second closing vibration signals.

4. The protection switch aging monitoring and early warning method based on multi-parameter fusion according to claim 3, characterized in that, Selecting a plurality of first closing vibration signals from the plurality of second closing vibration signals includes: Judging whether an automatic protection event occurs in the protection circuit within a preset time period before the power-off moment, where the automatic protection event includes a leakage time, an overload event, and a short-circuit time; If an automatic protection event occurs in the protection circuit within a preset time period before the power-off moment, then determining the second closing vibration signal corresponding to the power-off moment as the third closing vibration signal, and obtaining a plurality of third closing vibration signals; Selecting a plurality of first closing vibration signals from the plurality of third closing vibration signals.

5. The protection switch aging monitoring and early warning method based on multi-parameter fusion according to claim 4, wherein, The insulation performance parameters include leakage currents at multiple moments and dielectric strengths at multiple moments. Determining the second aging parameter of the protection switch based on the insulation performance parameters includes: Calculating an average current value of the leakage currents at multiple moments and an average strength value of the dielectric strengths at multiple moments; Determining a second aging parameter based on the average current value and the average strength value.

6. The method for aging monitoring and early warning of a protection switch based on multi-parameter fusion according to claim 5, characterized in that Determining the target aging parameter of the protection switch based on the first aging parameter and the second aging parameter includes: Obtaining the temperature of the contacts of the protection switch through a temperature sensor to obtain a temperature change curve; Performing linear fitting on the temperature change curve to obtain a temperature fitting line; Detect the operating current passing through the protection switch via a current sensor to obtain a current change curve; Determine a third aging parameter based on the slope of the temperature fitting straight line and the coefficient of variation of the current change curve, wherein the greater the slope of the temperature fitting straight line, the greater the third aging parameter, and the greater the coefficient of variation of the current change curve, the greater the third aging parameter; Determine the target aging parameter of the protection switch based on the first aging parameter, the second aging parameter, and the third aging parameter.

7. A protection switch aging monitoring and warning device based on multi-parameter fusion, characterized in that, The protection switch aging monitoring and warning device based on multi-parameter fusion includes: A first acquisition module for acquiring a plurality of first closing vibration signals when the protection switch closes multiple times; A first determination module for determining the first aging parameter of the protection switch based on the plurality of first closing vibration signals; A second acquisition module for acquiring the insulation performance parameter of the insulation layer of the protection switch; A second determination module for determining the second aging parameter of the protection switch based on the insulation performance parameter; A third determination module for determining the target aging parameter of the protection switch based on the first aging parameter and the second aging parameter; An early warning module for performing aging early warning based on the target aging parameter.

8. An electronic device, characterized in that, It includes a memory and a processor. The memory stores a computer program, and the processor is used to run the computer program in the memory to execute the steps in the method for monitoring and warning the aging of a protection switch based on multi-parameter fusion according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor to execute the steps in the method for monitoring and warning the aging of a protection switch based on multi-parameter fusion according to any one of claims 1 to 6.

10. A computer program product comprising a computer program or instructions, characterized in that, When the computer program or instructions are executed by the processor, the steps in the method for monitoring and warning the aging of a protection switch based on multi-parameter fusion according to any one of claims 1 to 6 are implemented.

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