Fault detection method, device and equipment based on high-voltage circuit breaker and storage medium

Abstract

Embodiments of the present application provide a fault detection method and device based on a high-voltage circuit breaker, equipment and a storage medium. The method comprises: obtaining time information and displacement information at a preset time; the time information represents the round-trip time length of the laser emitted by the laser sensor reflecting in the preset area; the preset area is an area on the high-voltage circuit breaker, and the preset area moves synchronously with the movable contact during the opening or closing process of the high-voltage circuit breaker; the displacement information represents the position change of the light spot generated by the laser irradiating on the preset area at the preset time; according to the time information and the displacement information, the distance information at the preset time is determined; the distance information represents the position change of the movable contact at the preset time; according to the distance information at each preset time, the fault information is determined; the fault information represents whether the movable contact of the high-voltage circuit breaker has displacement abnormality during the opening or closing process. The method is used to improve the accuracy of fault detection of the high-voltage circuit breaker.

Description

Technical Field

[0001] This application relates to the field of electronic and electrical technology, and in particular to a fault detection method, device, equipment and storage medium based on a high-voltage circuit breaker. Background Technology

[0002] As a core control and protection device in the power system, the mechanical characteristics of high-voltage circuit breakers directly affect the safe and stable operation of the power grid.

[0003] In related technologies, a fault in a high-voltage circuit breaker is detected by measuring the stroke change of the moving contact through a mechanical connection between a steel wire rope and the moving contact.

[0004] However, wire ropes are prone to tooth skipping, breakage, or pulley backing due to the impact force of opening and closing, which leads to low accuracy in fault detection of high-voltage circuit breakers. Therefore, how to improve the accuracy of fault detection of high-voltage circuit breakers has become an urgent technical problem to be solved. Summary of the Invention

[0005] This application provides a fault detection method, apparatus, equipment, and storage medium based on high-voltage circuit breakers, in order to improve the accuracy of fault detection of high-voltage circuit breakers.

[0006] In a first aspect, embodiments of this application provide a fault detection method based on a high-voltage circuit breaker, including:

[0007] The system acquires time and displacement information at a preset time. The time information represents the round-trip time of the laser emitted by the laser sensor being reflected in the preset area. The preset area is a region on the high-voltage circuit breaker, and the preset area moves synchronously with the moving contact during the opening or closing process of the high-voltage circuit breaker. The displacement information represents the positional change of the light spot generated by the laser irradiating the preset area at the preset time.

[0008] Based on the time information and the displacement information, the distance information at the preset time is determined; the distance information represents the positional change of the moving contact at the preset time.

[0009] Based on the distance information at each preset time, fault information is determined; the fault information indicates whether the opening or closing operation of the high-voltage circuit breaker is normal.

[0010] In one possible implementation, fault information is determined based on distance information at each preset time point, including:

[0011] For each preset time, the preset time is taken as the current time, and the target information at the current time is determined based on the distance information at each preset time within the preset time period; the current time is located within the preset time period; the target information represents the positional change of the moving contact after eliminating electromagnetic interference at the current time.

[0012] The fault information is determined based on the target information at each current moment.

[0013] In one possible implementation, the target information at the current moment is determined based on the distance information at each preset time within a preset time period, including:

[0014] Determine the average and variance of all distance information within a preset time period;

[0015] For each preset moment within a preset time period, the preset moment is taken as the traversal moment, and the abnormal information at the traversal moment is determined based on the distance information, the average value, and the variance at the traversal moment; the abnormal information indicates whether the distance information at the traversal moment is generated by electromagnetic interference.

[0016] Based on the distance information and the anomaly information at each of the traversal times, the target information at the current time is determined.

[0017] In one possible implementation, determining the target information at the current time based on the distance information and the anomaly information at each of the traversal times includes:

[0018] For each traversal time, a target weight is determined based on the preset weight and the abnormal information at the traversal time; the target weight represents the degree of influence of the distance information at the traversal time on the distance information at the current time.

[0019] Based on the distance information and target weight at each traversal time, the target information at the current time is determined.

[0020] In one possible implementation, determining the distance information at the preset time based on the time information and the displacement information includes:

[0021] Based on the time information and the displacement information, initial information is determined; the initial information represents the position change of the moving contact at a pre-determined preset time.

[0022] Obtain vibration information at the preset time; the vibration information represents the first acceleration generated by the high-voltage circuit breaker in the direction of movement of the moving contact during the opening or closing process of the high-voltage circuit breaker.

[0023] Based on the initial information and the vibration information, the distance information at the preset time is determined.

[0024] In one possible implementation, determining the distance information at the preset time based on the initial information and the vibration information includes:

[0025] Based on the vibration information, compensation information is determined; the compensation information characterizes the degree to which the movement of the high-voltage circuit breaker in the direction of movement of the moving contact affects the positional change of the moving contact.

[0026] Based on the initial information and the compensation information, the distance information at the preset time is determined.

[0027] In one possible implementation, fault information is determined based on distance information at each preset time point, including:

[0028] Based on the distance information at each preset time, the target time is determined from all preset times; the target time represents the time when the high-voltage circuit breaker ends closing.

[0029] Determine the peak value of all distance information within a preset time period after the target time;

[0030] The fault information is determined based on the peak value and the distance information at the target time.

[0031] In one possible implementation, the target time is determined from all preset times based on the distance information at each preset time, including:

[0032] Based on the distance information at each preset time, determine the second acceleration at each preset time.

[0033] The target time is determined from all preset times based on the second acceleration at each preset time.

[0034] Secondly, embodiments of this application provide a fault detection device based on a high-voltage circuit breaker, comprising:

[0035] The acquisition module is used to acquire time information and displacement information at a preset time. The time information represents the round-trip time of the laser emitted by the laser sensor being reflected in the preset area. The preset area is an area on the high-voltage circuit breaker, and the preset area moves synchronously with the moving contact during the opening or closing process of the high-voltage circuit breaker. The displacement information represents the positional change of the light spot generated by the laser irradiating the preset area at the preset time.

[0036] The first determining module is used to determine the distance information at the preset time based on the time information and the displacement information; the distance information represents the position change of the moving contact at the preset time.

[0037] The second determining module is used to determine fault information based on the distance information at each preset time; the fault information indicates whether the moving contact of the high-voltage circuit breaker has an abnormal displacement during the opening or closing process.

[0038] Thirdly, embodiments of this application provide a fault detection device based on a high-voltage circuit breaker, comprising: a memory and a processor;

[0039] The memory stores computer-executed instructions;

[0040] The processor executes computer execution instructions stored in the memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0041] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect.

[0042] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0043] The fault detection method, apparatus, equipment, and storage medium based on high-voltage circuit breakers provided in this application acquire time and displacement information at a preset time. The time information represents the round-trip time of the laser emitted by the laser sensor reflected in a preset area, which is a region on the high-voltage circuit breaker. During the opening or closing process of the high-voltage circuit breaker, the preset area moves synchronously with the moving contact. The displacement information represents the positional change of the laser spot generated by the laser irradiating the preset area at the preset time. By calculating the laser flight time and spot positional change in real time, it is used for subsequent fault analysis. This eliminates the contact-based measurement methods such as pull-rope sensors used in related technologies, completely eliminating sensor inaccuracies caused by mechanical wear and arc contamination, and improving the long-term stability and reliability of the measurement. Subsequently, the continuous time and position information are converted into a series of distance information, realizing a complete record of the entire opening and closing process of the high-voltage circuit breaker, providing a data foundation for subsequent fault detection. Finally, by analyzing the distance information at each preset time, it is determined whether the opening or closing operation of the high-voltage circuit breaker is normal. This upgrades fault diagnosis from manual experience to data-driven decision-making, solving the problems of single diagnostic dimensions and reliance on manual labor in traditional methods, thereby improving the accuracy of fault detection for high-voltage circuit breakers. Attached Figure Description

[0044] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0045] Figure 1 A flowchart illustrating the fault detection method based on high-voltage circuit breakers provided in this application embodiment. Figure 1 ;

[0046] Figure 2 A flowchart illustrating the fault detection method based on high-voltage circuit breakers provided in this application embodiment. Figure 2 ;

[0047] Figure 3 A flowchart illustrating fault detection based on high-voltage circuit breakers provided in this application embodiment. Figure 3 ;

[0048] Figure 4 A flowchart illustrating the fault detection method based on high-voltage circuit breakers provided in this application embodiment. Figure 4 ;

[0049] Figure 5 This is a schematic diagram of the structure of a fault detection device based on a high-voltage circuit breaker provided in an embodiment of this application;

[0050] Figure 6 This is a schematic diagram of the structure of a fault detection device based on a high-voltage circuit breaker provided in an embodiment of this application.

[0051] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0052] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0053] As a core control and protection device in the power system, the mechanical characteristics of high-voltage circuit breakers directly affect the safe and stable operation of the power grid. In intelligent substations and automated operation and maintenance systems, the mechanical parameters of the circuit breaker's moving contact, such as stroke, speed, and acceleration, are key indicators for assessing the equipment's health status and predicting fault risks. For example, during the circuit breaker's opening and closing operations, the movement trajectory of the moving contact must strictly conform to the design specifications: if the stroke exceeds the tolerance, it may cause poor contact or arc extinguishing failure, while abnormal rebound indicates aging of the buffer or jamming of the mechanism.

[0054] Traditional testing methods rely on regular manual inspections or offline testing, making it difficult to achieve real-time monitoring of equipment status and fault early warning. Furthermore, as high-voltage equipment develops towards higher voltage levels (e.g., above 126kV) and more complex operating conditions (e.g., strong electromagnetic interference, high temperatures, sulfur hexafluoride gas leakage), higher demands are placed on the environmental adaptability, measurement accuracy, and long-term stability of testing equipment. For example, in 2000 opening and closing tests of a 40.5kV circuit breaker, the accuracy of contact sensors decreased due to mechanical wear, while ultrasonic sensors showed an error of ±1.5mm under electromagnetic interference, far exceeding the industry standard's allowable threshold of 0.5mm.

[0055] In related technologies, a steel wire rope is mechanically connected to the moving contact to measure stroke changes in real time. However, the steel wire rope is prone to tooth skipping, breakage, or pulley backing due to the impact force of opening and closing. Furthermore, metal vapor contamination in high-pressure environments accelerates the wear of mechanical components, resulting in an average lifespan of less than 12 months. In addition, the mechanical connection method limits the installation flexibility of the sensor and makes it difficult to adapt to different circuit breaker structures.

[0056] Related technologies also include non-contact solutions, such as photoelectric encoders and ultrasonic sensors. Photoelectric encoders require structural modifications to the circuit breaker spindle to install a code disk, violating the maintenance principle of "not damaging the original structure," and the encoder's accuracy is easily affected by dust or oil. While ultrasonic sensors do not require physical contact, their echo signal's signal-to-noise ratio decreases significantly in environments with strong electromagnetic interference, leading to excessive measurement errors. Furthermore, they have extremely high requirements for the parallelism of the installation location, making on-site debugging complex.

[0057] Most related technologies only output basic parameters (such as stroke and speed) and lack the ability to perform in-depth analysis of displacement-time curves. For example, they cannot automatically identify signs of contact jamming (characterized by sudden acceleration changes) or buffer failure (manifested as excessive rebound), forcing most mechanical defects to be judged based on human experience, which lags behind the need for fault warnings. In addition, the calibration process relies on manual operation, which is time-consuming and prone to human error, making it difficult to meet the requirements for long-term stable operation.

[0058] The fault detection method, apparatus, equipment, and storage medium based on high-voltage circuit breakers provided in this application are intended to solve the aforementioned technical problems.

[0059] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0060] Figure 1 A flowchart illustrating the fault detection method based on high-voltage circuit breakers provided in this application embodiment. Figure 1 ,like Figure 1 As shown, the method includes:

[0061] S101. Obtain time information and displacement information at a preset time. The time information represents the round-trip time of the laser emitted by the laser sensor being reflected in the preset area. The preset area is the area on the high-voltage circuit breaker. During the opening or closing process of the high-voltage circuit breaker, the preset area moves synchronously with the moving contact. The displacement information represents the positional change of the light spot generated by the laser irradiating the preset area at the preset time.

[0062] For example, when a high-voltage circuit breaker performs an opening or closing operation, a laser displacement sensor installed outside the high-voltage circuit breaker enclosure is controlled to emit a modulated laser beam towards a dedicated reflective marking area fixed on the moving contact transmission link. The laser displacement sensor can be fixedly installed at a designated position on the outer surface of the high-voltage circuit breaker operating enclosure. By adjusting the optical axis of the laser displacement sensor, it is made spatially parallel to the movement trajectory of the moving contact. The dedicated reflective marking area is located in the visible area of ​​the moving contact transmission link to reflect the laser beam.

[0063] For example, the laser displacement sensor is fixed to the side of the high-voltage circuit breaker mechanism box using a magnetic bracket, and the parallelism error between the optical axis and the moving contact linkage trajectory is adjusted to be less than a preset angle (e.g., 0.3 degrees). A composite reflective coating with a diameter of 25 mm (e.g., a reflectivity of 92%) is sprayed at 120 mm of the linkage main shaft as a preset area. The laser displacement sensor adopts a coaxial laser emitting and receiving optical structure, and its technical parameters meet the following requirements: measurement resolution not greater than 0.01 mm, sampling frequency not less than 10 kHz, and effective range covering more than 1.2 times the rated stroke of the high-voltage circuit breaker. Specifically, a coaxial laser sensor is selected, configured with a range of 150 mm (covering 125% of the rated stroke of a 126 kV high-voltage circuit breaker). An optical filter is set to suppress stray light beyond 650 nm. In a strong electromagnetic field environment (e.g., field strength greater than or equal to 100 V / m), a 10 kHz high-speed sampling mode is activated, and a 16-bit analog-to-digital converter ensures a resolution of 0.01 mm, with the measurement delay controlled within 50 microseconds.

[0064] The dedicated reflective marking area is constructed from a high-temperature resistant ceramic-based composite reflective material. The surface is coated with a specialized optical coating with a reflectivity greater than 85%. An anti-arc ablation transparent quartz protective cover can also be added outside the coating, forming a heat dissipation channel between the protective cover and the dedicated reflective marking area. The reflective coating is prepared using a plasma spraying process, and the quartz protective cover is fixed with stainless steel clamps, creating a convective heat dissipation channel with a 3mm gap between it and the coating. Its reflectivity is tested quarterly; when the reflectivity drops to 80%, a cleaning program is automatically triggered, outputting a 3-second pulsed laser to ablate the surface carbon deposits.

[0065] The laser displacement sensor uses an internal clock circuit to precisely measure the round-trip flight time of the laser from emission to reflection by a dedicated reflective marker area and back to the sensor at a preset sampling frequency. This measured flight time is used as the time information at a preset time. For example, if the laser flight time is measured to be 667 picoseconds at the 10th millisecond, then the 10th millisecond is the preset time, and the acquired time information is 667 picoseconds. At this time, the preset area is the dedicated reflective marker area fixed on the moving contact transmission link. During the opening or closing process of the high-voltage circuit breaker, the preset area moves synchronously with the moving contact to indirectly reflect the movement of the moving contact. The preset area can also be other areas; this embodiment does not limit this.

[0066] The detector inside the laser sensor synchronously captures the position of the reflected light spot on the imaging surface. The offset of this position relative to an initial reference point (such as the pixel corresponding to the first sampling point) is the acquired displacement information. For example, if the center of the light spot is measured to have shifted by 380 pixels at the 10th millisecond, then the acquired displacement information for the 10th millisecond is 380 pixels.

[0067] S102. Based on the time information and displacement information, determine the distance information at the preset time; the distance information represents the position change of the moving contact at the preset time.

[0068] For example, a preset data fusion algorithm in the built-in processor of the laser sensor can be invoked to calculate the distance information at a preset time based on time and displacement information. The distance information represents the position change of the moving contact at the preset time; for example, the distance information is the real-time position of the moving contact.

[0069] As an example, firstly, based on the time information, calculate the absolute distance, that is, the absolute position of the moving contact. For example, the absolute distance can be calculated according to the following formula (1):

[0070] (1);

[0071] In the formula, Indicates absolute distance; Represents the speed of light; This represents the time information at the preset time t.

[0072] Then, the relative distance, i.e., the relative position of the moving contact, is calculated according to the principle of triangulation. For example, the relative distance can be calculated according to the following formula (2):

[0073] (2);

[0074] In the formula, Indicates relative distance; This represents the displacement information at the preset time t; This indicates the calibration factor (e.g., 0.026 mm per pixel).

[0075] Then, a weighted average or Kalman filter is applied to the absolute and relative distances to output a more accurate and noise-resistant distance information at a preset time. At this point, the determined distance information is the actual displacement of the moving contact relative to its initial position (such as the position of the moving contact at the start of the tripping) at the preset time.

[0076] The advantage of this approach is that by fusing laser time-of-flight ranging and spot position offset information, high-precision, non-contact measurement of the moving contact's position changes is achieved. The method combines the advantages of absolute distance measurement based on time information and relative distance measurement based on displacement information, ensuring measurement stability over long distances while improving local dynamic resolution through triangulation. Furthermore, data fusion algorithms such as weighted averaging or Kalman filtering effectively suppress random errors and environmental interference that might be introduced by a single measurement method, resulting in a smoother and more reliable moving contact displacement sequence. This step not only provides a high-quality data foundation for subsequent fault analysis but also significantly improves the adaptability and robustness of the entire detection process under complex conditions such as strong electromagnetic fields and high vibration.

[0077] S103. Determine the fault information based on the distance information at each preset time. The fault information indicates whether the opening or closing operation of the high-voltage circuit breaker is normal.

[0078] For example, the distance information corresponding to all preset moments during the entire opening or closing process is arranged in chronological order to form the first displacement-time characteristic curve of the moving contact, where the first displacement is the distance information. The measured first displacement-time curve is compared and analyzed with the preset first historical health curve to obtain abnormal information. The historical health curve includes the distance information at each historical moment, and is a curve measured when the opening or closing operation of the high-voltage circuit breaker is normal. Abnormal information includes, but is not limited to:

[0079] (1) An unexpected section of steeply decreasing slope appears in the measured first displacement-time curve. At this time, the moving contact becomes stuck.

[0080] (2) When the deviation between the endpoint value and the rated stroke value exceeds the preset deviation threshold, the moving contact does not move to the position.

[0081] (3) By differentiating the distance information at each preset time, it is found that the average speed exceeds the preset allowable range. At this time, there is a speed anomaly.

[0082] When any one or more of the above anomalies are detected, fault information is generated. The generated fault information includes at least the fault type and the time of occurrence of the fault.

[0083] The advantage of this approach is that intelligent analysis of the displacement-time curve of the moving contact enables quantitative assessment of the mechanical condition of high-voltage circuit breakers and early fault warning. It can not only identify obvious fault characteristics such as excessive displacement and abnormal speed, but also capture potential performance degradation trends, such as buffer failure and precursors to mechanism jamming, through curve morphology analysis (e.g., abrupt slope changes and springback feature extraction). Furthermore, by automatically comparing the measured curve with historical health curves, it can achieve self-learning and dynamic adjustment of diagnostic thresholds, thus completing circuit breaker condition assessment and fault location without power interruption or disassembly. This step transforms traditional qualitative judgment relying on human experience into data-driven precision diagnosis, significantly improving the accuracy, real-time performance, and predictability of fault detection.

[0084] The fault detection method based on a high-voltage circuit breaker provided in this application acquires time and displacement information at a preset time. The time information represents the round-trip time of the laser emitted by the laser sensor reflected in a preset area, which is a region on the high-voltage circuit breaker. During the opening or closing process of the high-voltage circuit breaker, the preset area moves synchronously with the moving contact. The displacement information represents the position change of the laser spot generated by the laser irradiating the preset area at the preset time. By calculating the laser flight time and the position change of the laser spot in real time, it is used for subsequent fault analysis. This method eliminates the contact measurement methods such as pull-rope sensors used in related technologies, completely eliminating sensor inaccuracies caused by mechanical wear and arc contamination, and improving the long-term stability and reliability of the measurement. Subsequently, the continuous time and position information are converted into a series of distance information, realizing a complete record of the entire process of opening and closing the high-voltage circuit breaker, providing a data foundation for subsequent fault detection. Finally, by analyzing the distance information at each preset time, it is determined whether the opening or closing operation of the high-voltage circuit breaker is normal. This upgrades fault diagnosis from manual experience to data-driven decision-making, solving the problems of single diagnostic dimensions and reliance on manual labor in traditional methods, thereby improving the accuracy of fault detection for high-voltage circuit breakers.

[0085] Figure 2 A flowchart illustrating the fault detection method based on high-voltage circuit breakers provided in this application embodiment. Figure 2 ,like Figure 2 As shown, the method for determining fault information based on distance information at each preset time includes: for each preset time, taking that preset time as the current time, and determining the target information at the current time based on the distance information at each preset time within a preset time period; the current time is within the preset time period; the target information represents the positional change of the moving contact after eliminating electromagnetic interference at the current time; and determining the fault information based on the target information at each current time. This method includes:

[0086] S201. Obtain time and displacement information at a preset time.

[0087] S202. Based on the time information and displacement information, determine the distance information at the preset time.

[0088] S203. For each preset time, the preset time is taken as the current time, and the target information at the current time is determined based on the distance information at each preset time within the preset time period; the current time is within the preset time period; the target information represents the positional change of the moving contact after the electromagnetic interference is eliminated at the current time.

[0089] Strong electromagnetic interference can be eliminated by filtering all distance information through a sliding window. For example, the sliding window can be set to include 50 consecutive sampling points (i.e., 50 consecutive preset times). For each preset time, the corresponding sliding window includes that preset time and the 49 preset times that follow. For each preset time, by analyzing all distance information within the corresponding sliding window, it is determined whether to filter the distance information at that preset time.

[0090] For example, for each preset time point, that preset time point is taken as the current time point. Based on the distance information at each preset time point within the corresponding sliding window, the target information at the current time point is determined. The target information represents the positional change of the moving contact after the electromagnetic interference is eliminated at the current time point, that is, the distance information at the current time point after the electromagnetic interference is eliminated. In this case, the preset time period is the sliding window corresponding to the current time point.

[0091] In this embodiment, determining the target information at the current moment based on the distance information at each preset time within a preset time period includes:

[0092] Determine the average value and variance of all distance information within a preset time period; for each preset moment within the preset time period, use that preset moment as the traversal moment, and determine the abnormal information at the traversal moment based on the distance information, average value, and variance at the traversal moment; the abnormal information indicates whether the distance information at the traversal moment is generated by electromagnetic interference; determine the target information at the current moment based on the distance information and abnormal information at each traversal moment.

[0093] For example, assuming the current time is the 10th millisecond, and sampling is performed every 1 millisecond, the preset time period includes the 10th millisecond, the 11th millisecond, ..., up to the 60th millisecond. Calculate the average μ and variance σ of all distance information within the preset time period.

[0094] For each preset moment within a preset time period, this preset moment is used as the traversal moment. If the distance information, average value μ, and variance σ at the traversal moment meet preset conditions, then the distance information at that traversal moment is determined not to be generated by electromagnetic interference. If the distance information, average value μ, and variance σ at the traversal moment do not meet preset conditions, then the distance information at that traversal moment is determined to be generated by electromagnetic interference. If the distance information at the traversal moment is generated by electromagnetic interference, it indicates that the distance information at that traversal moment is abnormal. In subsequent data processing, the distance information at that traversal moment can be removed to ensure the accuracy of data processing.

[0095] For example, if the distance information at the traversal time is within the range of μ-2σ to μ+2σ (inclusive), then the distance information at that traversal time is determined not to be generated by electromagnetic interference; if the distance information at the traversal time exceeds the range of μ-2σ to μ+2σ, then the distance information at that traversal time is determined to be generated by electromagnetic interference. In this case, the preset condition is that the distance information at the traversal time is within the range of μ-2σ to μ+2σ (inclusive).

[0096] By calculating the average and variance of all distance information within a preset time period, and based on statistical principles, a comparison range is set according to the average and variance. For each preset moment within the preset time period, the distance information at that moment is compared and analyzed with the comparison range. This automatically identifies and marks abnormal data points that exceed the reasonable fluctuation range, thereby distinguishing between genuine mechanical motion signals and instantaneous data jumps caused by electric arc radiation, electromagnetic pulses, etc. Furthermore, since the comparison range is not fixed but dynamically set based on all distance information within the preset time period, calculation errors that might occur with fixed comparison values ​​are avoided, allowing for more accurate removal of abnormal data points.

[0097] Then, based on the distance information at each traversal time step, combined with the anomaly information at each traversal time step, the target information at the current time step is determined. Specifically, this includes:

[0098] For each traversal time step, the target weight at the traversal time step is determined based on the preset weight and the abnormal information at the traversal time step. The target weight represents the degree of influence of the distance information at the traversal time step on the distance information at the current time step. Based on the distance information at each traversal time step and the target weight at each traversal time step, the target information at the current time step is determined.

[0099] For example, the preset weights at each traversal time point can be weights set based on time decay rules. The newer the data (the closer the distance information is to the current traversal time point), the higher the preset weight. For instance, the preset weights for each traversal time point can be set according to the following formula:

[0100] (3);

[0101] In the formula, N represents the total number of preset times within the preset time period; This represents the preset weight at the i-th traversal time. The current time i is equal to N, the time closest to the current time is N-1, and the time farthest from the current time is 1. represents the attenuation coefficient, for example, 0.1; e represents the natural constant.

[0102] Since the distance information at each traversal time is generated by electromagnetic interference, indicating that the distance information at that traversal time is abnormal, for each traversal time, if the distance information at that traversal time is determined to be abnormal based on the abnormal information at that traversal time, then the target weight at that traversal time is set to 0; if the distance information at that traversal time is determined not to be abnormal based on the abnormal information at that traversal time, then the target weight at that traversal time is set to the preset weight at that traversal time.

[0103] Then, the distance information at all traversal times is weighted and summed based on the target weight at each traversal time to obtain the target information at the current time.

[0104] By assigning a pre-defined weight that decays over time to each pre-defined moment within a preset time period, the final output target information more accurately reflects the latest motion state of the moving contact. Abnormal points are removed using the abnormal information at each preset moment. Then, a weighted sum of all non-abnormal points within the preset time period is performed to obtain the target weight at the current moment, further smoothing out high-frequency random fluctuations. Through this dual filtering process of anomaly removal and exponential smoothing, the final output target information exhibits extremely high signal-to-noise ratio and smoothness, providing a high-quality data foundation for subsequent data processing.

[0105] S204. Determine the fault information based on the target information at each current moment.

[0106] For example, the target information at all current moments (i.e., at all preset moments) during the entire opening or closing process is arranged in chronological order to form the second displacement-time characteristic curve of the moving contact. The measured second displacement-time curve is compared and analyzed with the preset second historical health curve to obtain abnormal information. The second displacement is the information after noise filtering of the first displacement, and correspondingly, the displacement information in the second historical health curve is the information after noise filtering of the first historical health curve.

[0107] The fault detection method based on high-voltage circuit breakers provided in this application takes each preset time as the current time and uses distance information from each preset time within a preset time period, including the current time, to determine the target information at the current time. By defining a time window that slides over time, the distance information at the current time is evaluated within a short preset time period. This allows for the identification of distance information that deviates from the normal trend on a local time scale, thereby ensuring the accuracy of subsequent data processing.

[0108] Figure 3 A flowchart illustrating fault detection based on high-voltage circuit breakers provided in this application embodiment. Figure 3 ,like Figure 3 As shown, the method for determining distance information at a preset time based on time and displacement information includes: determining initial information based on time and displacement information; the initial information characterizing the positional change of the moving contact at the preliminarily determined preset time; acquiring vibration information at the preset time; the vibration information characterizing the first acceleration generated by the high-voltage circuit breaker in the direction of movement of the moving contact during the opening or closing process of the high-voltage circuit breaker; and determining the distance information at the preset time based on the initial information and vibration information. The method includes:

[0109] S301. Obtain time and displacement information at a preset time.

[0110] S302. Determine the initial information based on the time information and displacement information; the initial information represents the position change of the moving contact at the pre-determined preset time.

[0111] It should be noted that in this embodiment... Figure 1 Implementation examples or Figure 2 Building upon the previous embodiment, this paper further explains how to improve the accuracy of data processing by compensating for measurement errors caused by the vibration of the high-voltage circuit breaker body. For example, firstly, the absolute distance is calculated based on time information. Then, the relative distance is calculated using the triangulation principle. Next, a weighted average of the absolute and relative distances is performed to obtain initial information. This initial information characterizes the positional change of the moving contact at a pre-determined preset time, i.e., the positional change of the moving contact without considering the vibration of the high-voltage circuit breaker body.

[0112] S303. Obtain vibration information at a preset time. The vibration information represents the first acceleration generated by the high-voltage circuit breaker in the direction of movement of the moving contact during the opening or closing process of the high-voltage circuit breaker.

[0113] A triaxial microelectromechanical system (MEMS) accelerometer is installed on the base of the high-voltage circuit breaker, with its Z-axis aligned with the direction of movement of the moving contact. The vibration acceleration of the base in the direction of movement (i.e., the first acceleration) during the opening and closing of the high-voltage circuit breaker is acquired in real time. The vibration acceleration of the base in the direction of movement at a preset time is used as the vibration information at that preset time. The sampling frequency of the triaxial MEMS accelerometer is the same as that of the laser sensor.

[0114] S304. Based on the initial information and vibration information, determine the distance information at the preset time.

[0115] For example, based on initial information and combined with vibration information, distance information at a preset time is determined. Specifically, this includes:

[0116] Based on the vibration information, compensation information is determined; the compensation information characterizes the degree to which the movement of the high-voltage circuit breaker in the direction of movement of the moving contact affects the positional change of the moving contact; based on the initial information and the compensation information, the distance information at the preset time is determined.

[0117] For example, compensation information can be calculated based on vibration information and a preset compensation model. For instance, the preset compensation model can be represented by the following formula (4):

[0118] (4);

[0119] In the formula, This represents the compensation information at the preset time t. This represents the vibration error transmission coefficient obtained after calibration on a vibration table. This represents the vibration information at the preset time t; This indicates the sampling time interval. The compensation information characterizes the degree to which the movement of the moving contact in the direction of movement of the high-voltage circuit breaker affects the positional change of the moving contact; that is, the error caused by the positional change of the moving contact due to the movement of the moving contact in the direction of movement of the high-voltage circuit breaker.

[0120] Then, based on the initial information and compensation information, the distance information at the preset time is determined. For example, the distance information at the preset time can be calculated according to the following formula (5):

[0121] (5);

[0122] In the formula, This represents the distance information at the preset time t. This represents the initial information at the preset time t; This represents the load factor, which takes a value of +1 or -1 and is determined by the direction of displacement of the laser sensor caused by vibration.

[0123] In some specific implementations, within 15 to 25 milliseconds after the tripping action begins, the moving contact may collide with the buffer, generating high-frequency, large-amplitude mechanical bouncing and vibration. During this time, the acceleration of the base changes extremely rapidly. To keep up with this rapidly changing vibration, when the tripping bouncing phase is detected, the sampling frequency of the accelerometer and laser sensor is automatically increased, for example, from 10 kHz to 20 kHz.

[0124] The advantage of this setup is that by shortening the sampling interval, the first acceleration can be collected more frequently, and compensation information can be calculated, resulting in more accurate and smooth tracking and compensation of high-speed vibrations.

[0125] S305. Determine the fault information based on the distance information at each preset time.

[0126] In this embodiment, by integrating an optical displacement sensor and a vibration acceleration sensor, time synchronization and data synchronization between the two are achieved, forming a complementary advantage between optical measurement and inertial measurement, thereby obtaining more accurate distance information.

[0127] Figure 4 A flowchart illustrating the fault detection method based on high-voltage circuit breakers provided in this application embodiment. Figure 4 ,like Figure 4 As shown, the above method for determining fault information based on distance information at each preset time includes: determining a target time from all preset times based on the distance information at each preset time; the target time represents the time when the high-voltage circuit breaker ends closing; determining the peak value of all distance information within a preset time period after the target time; and determining the fault information based on the distance information and peak value at the target time. The above method includes:

[0128] S401. Obtain time and displacement information at a preset time.

[0129] S402. Determine the distance information at the preset time based on the time information and displacement information.

[0130] S403. Based on the distance information at each preset time, determine the target time from all preset times; the target time represents the time when the high-voltage circuit breaker ends closing.

[0131] For example, during the closing process, distance information at each preset time can be used to determine the target time from all preset times. The target time is the moment of the closing technology. Specifically, this includes:

[0132] Based on the distance information at each preset time, determine the second acceleration at each preset time; based on the second acceleration at each preset time, determine the target time from all preset times.

[0133] For example, based on the distance information at all preset times, a second displacement-time curve is obtained. Then, the second difference of the second displacement-time curve is calculated, which represents the second acceleration at each preset time. From all the second accelerations, the moment when the second acceleration first crosses zero or approaches zero with a negative value (deceleration) is found. This moment marks the end of the active closing power and the beginning of the moving contact collision. This moment is taken as the target moment for the end of closing.

[0134] S404. Determine the peak value of all distance information within a preset time period after the target time.

[0135] For example, after determining the target time, the maximum value of the distance information, i.e. the peak value, is searched at all preset times within a preset time period (e.g., within 50 milliseconds) after the target time.

[0136] S405. Determine the fault information based on the peak value and the distance information at the target time.

[0137] For example, the absolute value of the difference between the distance information at the target time and the peak value is calculated, and this absolute value represents the overtravel of the moving contact. When this absolute value is greater than a preset safety threshold, a fault message is generated, indicating that an overtravel anomaly exists during the closing process of the high-voltage circuit breaker.

[0138] In some specific implementations, the above method also includes an automatic calibration procedure for performing zero-point calibration of the measurement while the high-voltage circuit breaker is in a static, open state. A hydraulic calibration device pushes the moving contact to a standard stroke position, and the range conversion parameters (a digital coefficient within the laser sensor used to convert the raw signal acquired by the laser sensor into an actual displacement value in millimeters) are automatically updated based on the deviation between the standard position and the laser sensor reading. A temperature sensor synchronously corrects for thermal expansion errors (steel connecting rod compensation coefficient 11.45 × 10⁻). 6 / ℃). The automatic calibration process is as follows: In the steady-state of the circuit breaker opening, press and hold the calibration button for 3 seconds; the hydraulic push rod (accuracy ±0.02mm) pushes the moving contact to the 100mm standard position at a speed of 0.05m / s; the laser sensor reads the actual value; the displacement conversion coefficient K_new=K_old×(100 / S_act) is automatically updated, and the automatic update formula is:

[0139] (6);

[0140] In the formula, Indicates the updated displacement transformation coefficient; Indicates the displacement transformation coefficient before the update; This represents the actual value read by the laser sensor.

[0141] In some specific implementations, the above method further includes:

[0142] The system extracts and outputs in real time the average moving speed of the moving contact (the ratio of distance information to time during the opening / closing process), the maximum acceleration value during the movement, and the rebound displacement amplitude generated when the moving contact collides.

[0143] Taking closing as an example, for the average movement speed of the moving contact, firstly calculate the first difference between the distance information of the opening end point and the distance information of the opening start point, then calculate the second difference between the preset time of the opening end point and the preset time of the opening start point, and use the ratio of the first difference to the second difference as the average movement speed of the moving contact.

[0144] To obtain the maximum acceleration value during the motion, the acceleration value at each preset time point is obtained by taking the second derivative of the distance information at each preset time point. Then, the maximum acceleration value is determined from the acceleration values ​​at each preset time point.

[0145] For the rebound displacement amplitude generated when the moving contact collides, calculate the third difference between the distance information of the closing point and the first valley value of the distance information at all preset times, and take the absolute value of the third difference as the rebound displacement amplitude.

[0146] By analyzing the average moving speed of the moving contact (the ratio of distance information to time during the opening / closing process), or the maximum acceleration value during the movement, or the rebound displacement amplitude generated when the moving contact collides, other fault information in the opening or closing operation of the high-voltage circuit breaker can be analyzed.

[0147] In some specific implementations, the method further includes performing morphological matching analysis between the measured stroke curve and a standard feature template, assessing the degree of wear and degradation of the mechanism based on historical data trends, and automatically generating a diagnostic report containing stroke waveforms and key status parameters. For example, the host computer receives the displacement data stream, calls the dynamic time warping algorithm to calculate the similarity between the measured curve and the standard template, analyzes the monthly change rate of overtravel, and generates a mechanism wear warning when the monthly change rate of overtravel exceeds a preset change rate threshold. The diagnostic report is then automatically output, including waveform comparison diagrams, a key parameter table, and maintenance recommendations (such as "Rebound 2.8mm > Threshold 2.0mm, it is recommended to check the buffer").

[0148] Figure 5 This is a schematic diagram of the structure of the fault detection device based on a high-voltage circuit breaker provided in the embodiments of this application, as shown below. Figure 5 As shown, the fault detection device 50 based on a high-voltage circuit breaker provided in this embodiment includes:

[0149] The acquisition module 501 is used to acquire time information and displacement information at a preset time. The time information represents the round-trip time of the laser emitted by the laser sensor being reflected in the preset area. The preset area is the area on the high-voltage circuit breaker. During the opening or closing process of the high-voltage circuit breaker, the preset area moves synchronously with the moving contact. The displacement information represents the position change of the light spot generated by the laser irradiating the preset area at the preset time.

[0150] The first determining module 502 is used to determine the distance information at a preset time based on the time information and displacement information; the distance information represents the position change of the moving contact at the preset time.

[0151] The second determining module 503 is used to determine fault information based on the distance information at each preset time. The fault information indicates whether the moving contact of the high-voltage circuit breaker has an abnormal displacement during the opening or closing process.

[0152] In one possible implementation, the second determining module 503 is further configured to:

[0153] For each preset time, the preset time is taken as the current time, and the target information at the current time is determined based on the distance information at each preset time within the preset time period; the current time is located within the preset time period; the target information represents the positional change of the moving contact after eliminating electromagnetic interference at the current time.

[0154] Based on the target information at each current moment, determine the fault information.

[0155] In one possible implementation, the second determining module 503 is further configured to:

[0156] Determine the average and variance of all distance information within a preset time period;

[0157] For each preset moment within a preset time period, the preset moment is used as the traversal moment, and the abnormal information at the traversal moment is determined based on the distance information, average value, and variance at the traversal moment; the abnormal information indicates whether the distance information at the traversal moment is generated by electromagnetic interference.

[0158] Based on the distance information and the anomaly information at each traversal time step, determine the target information at the current time step.

[0159] In one possible implementation, the second determining module 503 is further configured to:

[0160] For each traversal time step, the target weight at the traversal time step is determined based on the preset weight at the traversal time step and the abnormal information at the traversal time step. The target weight represents the degree of influence of the distance information at the traversal time step on the distance information at the current time step.

[0161] Based on the distance information and target weight at each traversal time step, determine the target information at the current time step.

[0162] In one possible implementation, the first determining module 502 is further configured to:

[0163] Based on time and displacement information, initial information is determined; initial information characterizes the position change of the moving contact at a pre-determined preset time.

[0164] Obtain vibration information at a preset time; the vibration information represents the first acceleration generated by the high-voltage circuit breaker in the direction of movement of the moving contact during the opening or closing process of the high-voltage circuit breaker.

[0165] Based on the initial information and vibration information, determine the distance information at the preset time.

[0166] In one possible implementation, the first determining module 502 is further configured to:

[0167] Based on the vibration information, compensation information is determined; the compensation information characterizes the degree to which the movement of the moving contact in the direction of movement of the high-voltage circuit breaker affects the positional change of the moving contact.

[0168] Based on the initial information and compensation information, the distance information at the preset time is determined.

[0169] In one possible implementation, the second determining module 503 is further configured to:

[0170] Based on the distance information at each preset time, the target time is determined from all preset times; the target time represents the time when the high-voltage circuit breaker ends closing.

[0171] Determine the peak value of distance information at all preset times after the target time;

[0172] Fault information is determined based on the distance information at the peak and target times.

[0173] The fault detection device based on a high-voltage circuit breaker provided in this embodiment can execute the method provided in the above-described method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0174] Figure 6 This is a schematic diagram of the structure of a fault detection device based on a high-voltage circuit breaker provided in an embodiment of this application. Figure 6As shown, the fault detection device 60 based on a high-voltage circuit breaker provided in this embodiment includes at least one processor 601 and a memory 602. Optionally, the fault detection device 60 based on a high-voltage circuit breaker further includes a communication component 603. The processor 601, memory 602, and communication component 603 are connected via a bus.

[0175] In a specific implementation, at least one processor 601 executes computer execution instructions stored in memory 602, causing at least one processor 601 to perform the above-described method.

[0176] The specific implementation process of processor 601 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0177] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0178] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0179] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0180] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0181] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0182] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0183] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0184] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0185] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0186] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0187] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0188] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0189] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A fault detection method based on a high-voltage circuit breaker, characterized in that, include: The system acquires time and displacement information at a preset time. The time information represents the round-trip time of the laser emitted by the laser sensor being reflected in the preset area. The preset area is a region on the high-voltage circuit breaker, and the preset area moves synchronously with the moving contact during the opening or closing process of the high-voltage circuit breaker. The displacement information represents the positional change of the light spot generated by the laser irradiating the preset area at the preset time. Based on the time information and the displacement information, the distance information at the preset time is determined; the distance information represents the positional change of the moving contact at the preset time. Based on the distance information at each preset time, determine the fault information; The fault information indicates whether the opening or closing operation of the high-voltage circuit breaker is normal.

2. The method according to claim 1, characterized in that, Based on the distance information at each preset time, fault information is determined, including: For each preset time, the preset time is taken as the current time, and the target information at the current time is determined based on the distance information at each preset time within the preset time period; the current time is located within the preset time period; the target information represents the positional change of the moving contact after eliminating electromagnetic interference at the current time. The fault information is determined based on the target information at each current moment.

3. The method according to claim 2, characterized in that, Based on the distance information at each preset time within a preset time period, the target information at the current time is determined, including: Determine the average and variance of all distance information within a preset time period; For each preset moment within a preset time period, the preset moment is taken as the traversal moment, and the abnormal information at the traversal moment is determined based on the distance information, the average value, and the variance at the traversal moment; the abnormal information indicates whether the distance information at the traversal moment is generated by electromagnetic interference. Based on the distance information and the anomaly information at each of the traversal times, the target information at the current time is determined.

4. The method according to claim 3, characterized in that, Based on the distance information and anomaly information at each of the aforementioned traversal times, the target information at the current time is determined, including: For each traversal time, a target weight is determined based on the preset weight and the abnormal information at the traversal time; the target weight represents the degree of influence of the distance information at the traversal time on the distance information at the current time. Based on the distance information and target weight at each traversal time, the target information at the current time is determined.

5. The method according to claim 1, characterized in that, Determining the distance information at the preset time based on the time information and the displacement information includes: Based on the time information and the displacement information, initial information is determined; the initial information represents the position change of the moving contact at a pre-determined preset time. Obtain vibration information at the preset time; the vibration information represents the first acceleration generated by the high-voltage circuit breaker in the direction of movement of the moving contact during the opening or closing process of the high-voltage circuit breaker. Based on the initial information and the vibration information, the distance information at the preset time is determined.

6. The method according to claim 5, characterized in that, Based on the initial information and the vibration information, the distance information at the preset time is determined, including: Based on the vibration information, compensation information is determined; the compensation information characterizes the degree to which the movement of the high-voltage circuit breaker in the direction of movement of the moving contact affects the positional change of the moving contact. Based on the initial information and the compensation information, the distance information at the preset time is determined.

7. The method according to any one of claims 1-6, characterized in that, Based on the distance information at each preset time, fault information is determined, including: Based on the distance information at each preset time, the target time is determined from all preset times; the target time represents the time when the high-voltage circuit breaker ends closing. Determine the peak value of all distance information within a preset time period after the target time; The fault information is determined based on the peak value and the distance information at the target time.

8. The method according to claim 7, characterized in that, Based on the distance information at each preset time, the target time is determined from all preset times, including: Based on the distance information at each preset time, determine the second acceleration at each preset time. The target time is determined from all preset times based on the second acceleration at each preset time.

9. A fault detection device based on a high-voltage circuit breaker, characterized in that, include: The acquisition module is used to acquire time information and displacement information at a preset time. The time information represents the round-trip time of the laser emitted by the laser sensor being reflected in the preset area. The preset area is an area on the high-voltage circuit breaker, and the preset area moves synchronously with the moving contact during the opening or closing process of the high-voltage circuit breaker. The displacement information represents the positional change of the light spot generated by the laser irradiating the preset area at the preset time. The first determining module is used to determine the distance information at the preset time based on the time information and the displacement information; the distance information represents the position change of the moving contact at the preset time. The second determining module is used to determine fault information based on the distance information at each preset time. The fault information indicates whether the moving contact of the high-voltage circuit breaker has experienced abnormal displacement during the opening or closing process.

10. A fault detection device based on a high-voltage circuit breaker, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-8.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-8.

12. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method described in any one of claims 1-8.

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