A high-voltage circuit breaker state monitoring and evaluation method and system

Abstract

The application relates to the field of measuring electric variables, and discloses a high-voltage circuit breaker state monitoring and evaluation method and system. Whether the breaking and closing performance is normal is judged by analyzing the arc time, closing inrush current, closing resistance and phase selection function in the breaking process. Whether the phase selection function is normally operated is judged by analyzing the operation of the phase selection function. Whether the mechanical characteristics are normal is judged by analyzing the mechanical characteristic performance of the circuit breaker. Whether the insulation performance is abnormal is detected by analyzing the change of the insulation performance of the circuit breaker during operation. The electric life of the circuit breaker is more deeply analyzed by comprehensively analyzing the judgment results, and the residual electric life of the circuit breaker is evaluated by setting an electric life threshold, which is favorable for accurately identifying the specific reasons and change of the circuit breaker failure problem, effectively analyzing and evaluating the electric life in a more in-depth manner, and thus making the evaluation result of the electric life more accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measuring electrical variables, and more particularly to a high-voltage circuit breaker state monitoring and evaluation method and system. BACKGROUND

[0002] A high-voltage circuit breaker, also known as a high-voltage switch, is one of the important electrical components in a high-voltage circuit. It can not only cut off or close the no-load current and load current in the high-voltage circuit, but also cut off the overload current and short-circuit current through the action of the relay protection device when a fault occurs in the system. With the development of smart grids, the maintenance method of traditional regular maintenance of high-voltage circuit breakers has gradually exposed problems such as low efficiency and high cost. Therefore, an intelligent evaluation method for the state of high-voltage circuit breakers has emerged. By automatically monitoring the working state of the circuit breaker and combining state monitoring with fault diagnosis, the maintenance time and content of the circuit breaker can be determined, which has higher efficiency and accuracy.

[0003] However, the above process still has the following disadvantages:

[0004] Firstly, the existing circuit breaker state monitoring cannot simultaneously collect multiple aspects of circuit breaker working operation state data for comprehensive monitoring, and lacks separate analysis and detection of each factor affecting the state of the circuit breaker, making it impossible to accurately identify the specific reasons and changes of the circuit breaker failure problem;

[0005] Secondly, the existing circuit breaker state monitoring process is usually single and cannot integrate multiple factors affecting the circuit breaker failure, thereby effectively analyzing and evaluating the electrical life, resulting in errors in the evaluation results of the electrical life, which leads to inaccurate evaluation results of the electrical life, causing high monitoring costs and long monitoring time. SUMMARY

[0006] In order to overcome the above-mentioned defects of the prior art, the present application provides a high-voltage circuit breaker state monitoring and evaluation method and system to solve the problems existing in the background art.

[0007] The present application provides a high-voltage circuit breaker state monitoring and evaluation method, comprising:

[0008] collecting circuit breaker working operation data;

[0009] calculating a break performance monitoring index based on the operation data , a phase selection performance deviation index , a mechanical characteristic performance change index , and an insulation performance monitoring index ;

[0010] based on the break performance monitoring index , phase selection performance offset index , mechanical characteristic performance change index , and insulation performance monitoring index calculate the electrical life evaluation coefficient ;

[0011] compare the electrical life evaluation coefficient with the preset electrical life threshold to generate a residual electrical life evaluation result;

[0012] generate a maintenance strategy and overhaul time according to the electrical life evaluation result, and send the maintenance strategy and overhaul time to a detection personnel terminal.

[0013] In some embodiments,

[0014] The collected circuit breaker operating data includes:

[0015] Collecting closing / opening voltage / current waveform data;

[0016] Collecting phase selection closing / opening phase information;

[0017] Collecting mechanical characteristic data;

[0018] Collecting vibration signal data;

[0019] After cleaning, converting, and integrating each data, the data is classified and stored in a database.

[0020] In some embodiments,

[0021] The calculation formula of the closing / opening performance monitoring index is:

[0022] ,

[0023] wherein, represents an actual closing / opening phase angle, represents a predetermined closing / opening phase angle, is a weight coefficient;

[0024] arc time , represents an arc termination time, represents an arc initiation time;

[0025] inrush current change value , represents a time when the inrush current drops to a steady-state current, represents an inrush current initiation time, represents an inrush current peak value, represents a steady-state current value, and is a weight coefficient of the current amplitude deviation;

[0026] change rate of closing resistance , indicates a time point resistance value of the closing resistance, indicates a time point resistance value of the closing resistance, indicates a time point time interval from the time point .

[0027] In some embodiments,

[0028] The phase selection performance deviation index The specific calculation formula is:

[0029] ,

[0030] wherein, indicates the phase deviation monitored for the i-th time, indicates the average value of the phase deviation monitored for n times, indicates the voltage waveform deviation monitored for the i-th time, indicates the average value of the voltage waveform deviation monitored for n times, indicates the current waveform deviation monitored for the i-th time, indicates the average value of the current waveform deviation monitored for n times, is a weight coefficient.

[0031] In some embodiments,

[0032] The mechanical characteristic performance change index The specific calculation formula is:

[0033] ,

[0034] wherein, indicates the closing speed measured for the j-th time, indicates the average value of the measured closing speed, indicates the opening speed measured for the j-th time, indicates the average value of the measured opening speed, indicates the closing force measured for the j-th time, indicates the average value of the measured closing force, indicates the opening force measured for the j-th time, indicates the average value of the measured opening force, is a weight coefficient.

[0035] In some embodiments,

[0036] the insulation performance monitoring index The calculation formula is:

[0037] ,

[0038] Among them, represents the current monitored discharge times, represents the minimum value of the monitored discharge times, represents the maximum value of the monitored discharge times, represents the current monitored discharge amount, represents the minimum value of the monitored discharge amount, represents the maximum value of the monitored discharge amount, represents the current monitored particle quantity, represents the minimum value of the monitored particle quantity, represents the maximum value of the monitored particle quantity, represents the current monitored particle size, represents the minimum value of the monitored particle size, represents the maximum value of the monitored particle size.

[0039] In some embodiments,

[0040] The electrical life evaluation coefficient The specific calculation formula is:

[0041] ,

[0042] Among them, exp represents the exponential function with the natural constant e as the base, and ln represents the natural logarithm, represents the breaking and combining performance monitoring index, represents the phase selection performance deviation index, represents the mechanical characteristic performance change index, represents the insulation performance monitoring index, represents the weight coefficient.

[0043] In some embodiments,

[0044] The electrical life evaluation coefficient is compared with the preset electrical life threshold The remaining electrical life evaluation result includes: if the electrical life evaluation coefficient The electrical life threshold , it is determined that the circuit breaker is normal, and if the electrical life evaluation coefficient The electrical life threshold , it is determined that the electrical life of the circuit breaker is degraded and the monitoring period is shortened.

[0045] In some embodiments,

[0046] The generating of the maintenance strategy and the overhaul time according to the electrical life evaluation result further comprises:

[0047] Periodically updating and recording the latest electrical life evaluation result.

[0048] The application further provides a high-voltage circuit breaker state monitoring and evaluation system for implementing the high-voltage circuit breaker state monitoring and evaluation method as described above, and the high-voltage circuit breaker state monitoring and evaluation system comprises:

[0049] A data acquisition module for acquiring circuit breaker operation data;

[0050] An analysis and generation module for calculating a breaking and closing performance monitoring index , a phase selection performance deviation index , a mechanical characteristic performance change index and an insulation performance monitoring index based on the operation data, and generating an electrical life evaluation coefficient based on the breaking and closing performance monitoring index , the phase selection performance deviation index , the mechanical characteristic performance change index and the insulation performance monitoring index ;

[0051] A comparison and evaluation module for comparing the electrical life evaluation coefficient with a preset electrical life threshold value to generate a residual electrical life evaluation result of the circuit breaker;

[0052] A feedback module for generating a maintenance strategy and an overhaul time according to the electrical life evaluation result.

[0053] The application has the following technical effects and advantages:

[0054] The application monitors and collects circuit breaker operation related data through a data collection tool, and pre-processes and stores the collected circuit breaker operation related data, obtains a breaking and closing performance monitoring index by analyzing the arc time, closing inrush current, closing resistance and phase selection function in the breaking process, so as to determine whether the breaking and closing performance of the circuit breaker is normal, obtains a phase selection performance deviation index by analyzing the operation of the phase selection function, so as to determine whether the phase selection function of the circuit breaker is normally operated, obtains a mechanical characteristic performance change index by analyzing the mechanical characteristic performance of the circuit breaker, so as to determine whether the mechanical characteristic of the circuit breaker is normal, obtains an insulation performance monitoring index by analyzing the change of the insulation performance of the circuit breaker during operation, detects whether the insulation performance is abnormal, comprehensively analyzes the electrical life of the circuit breaker by comprehensively analyzing the breaking and closing performance monitoring index, the phase selection performance deviation index, the mechanical characteristic performance change index and the insulation performance monitoring index, obtains an electrical life evaluation coefficient, and evaluates the remaining electrical life of the circuit breaker according to the preset electrical life threshold, finally, the maintenance strategy and overhaul time are given through the result of the electrical life evaluation, and the maintenance strategy and overhaul time are sent to the terminal of the detection personnel, at the same time, the working state data of the circuit breaker in multiple aspects is collected, so as to comprehensively monitor the working state of the circuit breaker, and each factor affecting the state of the circuit breaker can be analyzed and detected separately, which is beneficial to accurately identifying the specific reasons and changes of the fault problems of the circuit breaker, and through integrating multiple factors affecting the circuit breaker fault, the electrical life can be effectively analyzed and evaluated more deeply, the error of the evaluation result of the electrical life can be reduced, so that the evaluation result of the electrical life is more accurate, and the monitoring cost and time are reduced.

[0055] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application and can be implemented according to the content of the description, the following will describe the preferred embodiments of the application in detail with the help of the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0056] In order to more clearly illustrate the technical scheme of the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced, obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0057] Figure 1 The method steps of the application.

[0058] Figure 2 The system structure block diagram of the application. DETAILED DESCRIPTION

[0059] To further clarify the technical means and effects taken by the present application to achieve the intended purpose, the following describes the specific embodiments, structures, features and effects of the present application in detail in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "embodiments" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0060] In the description of the present application, it should be clear that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence; the terms "vertical", "horizontal", "longitudinal", "front", "back", "left", "right", "up", "down", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not mean that the device or element referred to must have a particular orientation or position, and therefore cannot be understood as a limitation on the present application.

[0061] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] In the field of high-voltage circuit breaker state monitoring and evaluation, there are two major problems in the prior art:

[0063] One-sidedness of state monitoring and difficulty in fault location; the existing method cannot simultaneously collect multi-dimensional operating data of the circuit breaker (such as electrical parameters during opening and closing, phase selection phase information, mechanical characteristic data, insulation performance related data, etc.), resulting in insufficient comprehensive monitoring of the state of the circuit breaker. At the same time, there is a lack of separate analysis of various key factors affecting the state of the circuit breaker (such as arc burning time, phase selection offset, mechanical wear, insulation degradation, etc.), making it difficult to accurately identify the specific cause of the fault and the trend, hindering fault troubleshooting and maintenance.

[0064] The existing technology usually evaluates the electrical life of the circuit breaker based on a single performance parameter (such as cumulative breaking times or current), without integrating the comprehensive influence of multiple factors such as breaking and closing performance, phase selection performance, mechanical characteristics, and insulation performance, resulting in a large error in the electrical life evaluation result and the inability to accurately reflect the actual remaining electrical life of the circuit breaker. This not only may cause excessive maintenance (increasing costs) or insufficient maintenance (causing safety risks), but also may lead to low monitoring efficiency and high time and economic costs due to the single evaluation logic and lack of dynamic adjustment mechanism.

[0065] As shown in Figure 1 The present application provides a high-voltage circuit breaker state monitoring and evaluation method, comprising:

[0066] Collecting circuit breaker operation data;

[0067] Calculating breaking and closing performance monitoring index , phase selection performance offset index , mechanical characteristic performance change index , and insulation performance monitoring index ;

[0068] Calculating electrical life evaluation coefficient based on breaking and closing performance monitoring index , phase selection performance offset index , mechanical characteristic performance change index , and insulation performance monitoring index ;

[0069] Comparing electrical life evaluation coefficient with preset electrical life threshold to obtain remaining electrical life evaluation result

[0070] Generating repair strategy and overhaul time according to the electrical life evaluation result and sending the repair strategy and overhaul time to the detection personnel terminal.

[0071] In this embodiment, by collecting circuit breaker operation data, calculating breaking and closing performance monitoring index, phase selection performance offset index, mechanical characteristic performance change index, and insulation performance monitoring index, and fusing to generate electrical life evaluation coefficient, the remaining electrical life evaluation result is obtained by comparing with the threshold, and the repair strategy is finally generated and sent to the terminal.

[0072] The problems of "unable to collect multi-dimensional data simultaneously" and "single factor analysis leading to large evaluation error" in the prior art are solved.

[0073] In the present embodiment, through the process of "multi-dimensional data acquisition, multi-index calculation and comprehensive evaluation", the core performance of circuit breaker electrical (break, select phase), mechanical and insulation is covered, and the one-sidedness of single data monitoring is solved.

[0074] Through the logic of "index fusion, electrical life coefficient and threshold comparison", the dispersed performance parameters are converted into quantitative life evaluation results, avoiding the limitations of single index, and making the evaluation more accurate.

[0075] Finally, the maintenance strategy is generated and pushed to the terminal, realizing the closed loop from monitoring to maintenance, and solving the problems of low efficiency and high cost of traditional periodic maintenance.

[0076] The overall monitoring of the state of the circuit breaker is realized, the residual electrical life is accurately evaluated, the targeted maintenance is guided, the evaluation accuracy and maintenance efficiency are improved, and the monitoring cost is reduced.

[0077] The present embodiment realizes the overall monitoring and accurate evaluation of the state of the circuit breaker through multi-dimensional data acquisition, multi-performance index calculation, comprehensive electrical life evaluation and dynamic maintenance strategy generation, to solve the limitations of the prior art.

[0078] In some embodiments,

[0079] The collected circuit breaker working operation data includes:

[0080] The opening and closing voltage / current waveform data is collected;

[0081] The phase selection closing / opening phase information is collected;

[0082] The mechanical characteristic data is collected;

[0083] The vibration signal data is collected;

[0084] After cleaning, converting and integrating, the data is classified and stored in the database.

[0085] In the present embodiment, the opening and closing voltage / current waveform, phase selection phase information, mechanical characteristic data and vibration signal data are collected, and after cleaning, converting and integrating, they are classified and stored in the database. The data collection of the prior art is scattered and not standardized, resulting in low reliability of subsequent analysis.

[0086] The present embodiment clearly collects "electrical waveform, phase selection phase, mechanical characteristic and vibration signal" to cover the electrical and mechanical key dimensions of the circuit breaker operation, ensuring the comprehensiveness of the data;

[0087] After data cleaning (denoising), conversion (unified format) and integration (time sequence correlation), the data is classified and stored, solving the problem of disordered and low-quality original data, and providing a high-quality data basis for subsequent four types of index calculation;

[0088] Categorized storage facilitates quick access to data in specific dimensions, improving analysis efficiency.

[0089] Ensuring the comprehensiveness and high quality of monitoring data provides reliable support for subsequent performance index calculations and improves the quality of basic data for condition assessment.

[0090] In some implementations...

[0091] The break-in performance monitoring index The calculation formula is:

[0092] ,

[0093] in, This indicates the actual opening and closing phase angle. Indicates the predetermined opening and closing phase angle. These are the weighting coefficients;

[0094] Arc time , Indicates the moment when the arc terminates. Indicates the moment of arc initiation;

[0095] Inrush Change Value , This indicates the moment when the inrush current drops to the steady-state current. Indicates the start time of the surge. Indicates the peak flow rate. This represents the steady-state current value. and These are the weighting coefficients;

[0096] Closing resistance change rate , Indicates a point in time The resistance value of the closing resistor. Indicates a point in time The resistance value of the closing resistor. Indicates a point in time With time point The time interval.

[0097] In this embodiment, the formula for calculating the break-in performance monitoring index is: fusion Flow variation value Change rate of closing resistance Phase deviation And through weighting coefficients Adjust the effects of each parameter.

[0098] Breaking and making performance is the core function of a circuit breaker. Current technology often only monitors the arcing time, ignoring key factors such as inrush current and resistance.

[0099] This embodiment integrates "arc time (reflecting arc energy), inrush current (reflecting transient impact), closing resistance (reflecting contact stability), phase deviation (reflecting operation accuracy)", covering the electrical characteristics of the opening and closing process comprehensively;

[0100] The weight coefficient can be adjusted according to the type of circuit breaker (such as SF6, vacuum), to adapt to the importance difference of each parameter in different scenarios, and to avoid misjudgment caused by fixed weight;

[0101] Quantitative calculation changes the opening and closing performance from "qualitative description" to "quantitative index", which is convenient for accurate judgment of whether the opening and closing is abnormal.

[0102] Comprehensively reflects the opening and closing performance of the circuit breaker, adapts to different scenarios through weight, accurately identifies the opening and closing abnormality, and provides reliable electrical performance basis for electrical life evaluation.

[0103] In some embodiments,

[0104] The phase selection performance deviation index The specific calculation formula is:

[0105] ,

[0106] Wherein, represents the phase deviation of the i-th monitoring, represents the average value of the phase deviation of n monitoring, represents the voltage waveform deviation of the i-th monitoring, represents the average value of the voltage waveform deviation of n monitoring, represents the current waveform deviation of the i-th monitoring, represents the average value of the current waveform deviation of n monitoring, is the weight coefficient.

[0107] In this embodiment, the phase selection performance deviation index calculation formula is based on the statistical analysis of the phase deviation, voltage / current waveform deviation of the i-th and n-th monitoring, and the phase selection function deviation is fused through the weight coefficient .

[0108] The deviation of the phase selection function will cause the error of the operation time, and cause the overvoltage / current. The prior art only monitors the single phase deviation, and ignores the fluctuation trend.

[0109] This embodiment reflects the stability of the phase selection function (rather than single accidental deviation) through the statistical analysis of the phase deviation, voltage / current waveform deviation of multiple monitoring;

[0110] The voltage / current waveform deviation supplements the signal distortion besides the phase deviation, and more comprehensively describes the phase selection accuracy;

[0111] The weight coefficient can highlight key parameters (such as phase shift has greater impact on accuracy) and improve the sensitivity of the index to phase selection anomalies.

[0112] The stability of the phase selection function can be accurately evaluated, and phase shift and waveform distortion can be identified in a timely manner to avoid electrical faults caused by phase selection errors.

[0113] In some embodiments,

[0114] The mechanical characteristic performance change index The specific calculation formula is:

[0115] ,

[0116] Wherein, Vj represents the closing speed of the jth measurement, V represents the average value of the measured closing speed, Vj represents the opening speed of the jth measurement, V represents the average value of the measured opening speed, Fj represents the closing force of the jth measurement, F represents the average value of the measured closing force, Fj represents the opening force of the jth measurement, F represents the average value of the measured opening force, is a weight coefficient.

[0117] In this embodiment, the mechanical characteristic performance change index calculation formula is based on the deviation of the measured and average values of the closing / opening speed and closing / opening force, and the deviation is fused through the weight coefficient .

[0118] Mechanical failure (such as jamming and spring fatigue) is one of the main reasons for the failure of circuit breakers, and the existing technology mainly monitors a single mechanical parameter (such as speed).

[0119] The scheme takes the deviation of the closing / opening speed (reflecting the operation response) and the closing / opening force (reflecting the driving capacity) into account, covering the core dynamic characteristics of the mechanical system;

[0120] The deviation value directly reflects the wear, deformation or lubrication failure of the mechanical components (such as speed drop due to jamming, and force fluctuation due to spring fatigue), and can early identify the mechanical degradation trend;

[0121] The weight coefficient can be adjusted according to the mechanical structure (such as spring operation and hydraulic operation), and is suitable for sensitive parameters of different driving modes.

[0122] Comprehensive monitoring of mechanical system performance changes can early detect hidden dangers such as wear and fatigue, and avoid circuit breaker failure caused by mechanical failure.

[0123] In some embodiments,

[0124] The insulation performance monitoring index The calculation formula is:

[0125] ,

[0126] Wherein, represents the current monitoring discharge times, represents the minimum value of the monitored discharge times, represents the maximum value of the monitored discharge times, represents the current monitoring discharge amount, represents the minimum value of the monitored discharge amount, represents the maximum value of the monitored discharge amount, represents the current monitoring particle number, represents the minimum value of the monitored particle number, represents the maximum value of the monitored particle number, represents the current monitoring particle size, represents the minimum value of the monitored particle size, represents the maximum value of the monitored particle size.

[0127] In this embodiment, the insulation performance monitoring index calculation formula is based on the normalization processing (ratio to the respective extreme value) of the discharge times , discharge amount , particle number , particle size Comprehensive reflection of insulation deterioration degree.

[0128] Insulation performance deterioration is a gradual process, and the prior art often monitors discharge amount alone, ignoring key factors such as particle pollution.

[0129] This scheme integrates "discharge parameters (times, amount, reflecting local insulation damage), particle parameters (number, size, reflecting insulation medium pollution)", covering the core representation of insulation deterioration;

[0130] Normalization processing (such as and , The ratio of different scale parameters (such as discharge times "times" and particle size "μm") is converted into a comparable index in the range of 0-1, solving the problem of direct fusion of multiple parameters;

[0131] The particle number and size are directly related to the insulation breakdown risk (large particles are easy to cause local field strength concentration), which supplements the deficiency of traditional discharge monitoring.

[0132] A comprehensive assessment of insulation performance degradation trends can help identify potential risks of partial discharge and dielectric contamination in advance, thus preventing insulation breakdown accidents.

[0133] In some implementations...

[0134] The electrical lifetime assessment coefficient The specific calculation formula is as follows:

[0135] ,

[0136] Where exp represents an exponential function with base e, and ln represents the natural logarithm. Indicates the break-in performance monitoring index. Indicates the phase selection performance offset index. Indicator of mechanical characteristic performance change index Indicates the insulation performance monitoring index, This represents the weighting coefficient.

[0137] In this embodiment, the formula for calculating the electrical lifetime assessment coefficient is: Fusion breakage performance monitoring index Phase selection performance deviation index Mechanical characteristic performance change index and insulation performance monitoring index Through weighting coefficients Adjustments to the impact.

[0138] Electrical life is affected by a combination of electrical, mechanical, and insulation factors, and existing technologies rely on a single indicator for evaluation, which can lead to large errors.

[0139] This scheme solves the problem of the difficulty in comprehensively quantifying multiple factors by integrating four types of indices through an exponential function;

[0140] Properties of exponential functions (such as...) When it increases, As the absolute value increases, A sudden drop can amplify the impact of abnormal parameters, making the electrical lifetime coefficient more sensitive to performance degradation and preventing minor anomalies from being masked.

[0141] Weighting coefficient Based on the circuit breaker failure mode (e.g., a certain model is more prone to failure due to insulation degradation, then...), Increase (adjust) to adapt to the characteristics of different devices.

[0142] By integrating multiple performance parameters, it can sensitively reflect the trend of electrical lifetime degradation and improve the accuracy of remaining electrical lifetime assessment.

[0143] In some implementations...

[0144] Electrical life assessment coefficient comparing the electrical life assessment coefficient with a preset electrical life threshold value In comparison, the residual electrical life assessment result includes: if the electrical life assessment coefficient is less than the preset electrical life threshold value, determining that the circuit breaker is normal, and if the electrical life assessment coefficient is greater than the preset electrical life threshold value, determining that the electrical life of the circuit breaker is degraded and shortening the monitoring period. electrical life threshold value , determining that the circuit breaker is normal, and if the electrical life assessment coefficient is greater than the preset electrical life threshold value, determining that the electrical life of the circuit breaker is degraded and shortening the monitoring period. electrical life threshold value .

[0145] In this embodiment, the electrical life assessment coefficient is compared with a preset threshold value . In comparison, the residual electrical life assessment result includes: if the electrical life assessment coefficient is less than the preset electrical life threshold value, determining that the circuit breaker is normal, and if the electrical life assessment coefficient is greater than the preset electrical life threshold value, determining that the electrical life of the circuit breaker is degraded and shortening the monitoring period. electrical life threshold value , determining that the circuit breaker is normal, and if the electrical life assessment coefficient is greater than the preset electrical life threshold value, determining that the electrical life of the circuit breaker is degraded and shortening the monitoring period. electrical life threshold value .

[0146] The prior art lacks clear life assessment criteria, resulting in ambiguous maintenance timing.

[0147] This embodiment provides quantitative criteria through "threshold comparison", making the definition of normal / degraded state clear and executable;

[0148] When degraded, "shorten the monitoring period" (e.g. from once a month to once a week), solves the problem of possible missed rapid degradation stage in traditional fixed period monitoring, balancing safety and cost while ensuring safety and avoiding excessive monitoring (maintaining the original period when normal).

[0149] Clear electrical life state criteria, dynamic adjustment of monitoring frequency when degraded, precise state monitoring, and reduction of sudden failure risk.

[0150] In some embodiments,

[0151] Generating a maintenance strategy and overhaul time according to the electrical life assessment result further includes:

[0152] Periodically updating and recording the latest electrical life assessment result.

[0153] In this embodiment, after generating the maintenance strategy, the latest electrical life assessment result is periodically updated and recorded.

[0154] The prior art assessment results are mostly one-time output, lacking long-term data accumulation.

[0155] The "periodic update and record" of this embodiment can form time series data of electrical life changes, optimizing the weight coefficient (e.g. , ) Provide samples, improve evaluation model accuracy through machine learning iteration;

[0156] Record data to trace performance changes of the equipment throughout its life cycle, provide reference for life prediction of similar circuit breakers, and form a closed loop of "monitoring, evaluation and optimization".

[0157] Accumulate life cycle data, continuously optimize evaluation model, improve long-term evaluation accuracy, and support continuous improvement of circuit breaker life management.

[0158] The following is a specific embodiment of a high-voltage circuit breaker state monitoring and evaluation method of the application, in which the high-voltage circuit breaker state monitoring and evaluation method comprises:

[0159] S1: Monitor and collect circuit breaker operation related data through data collection tools, and pre-process and store the collected circuit breaker operation related data.

[0160] The specific monitoring and collection method of S1 for circuit breaker operation related data is:

[0161] By deploying voltage / current sensors at the input and output ends of the circuit breaker, real-time monitoring and collection of voltage / current waveform data for each opening and closing are realized; by deploying phase sensors at key positions of the circuit breaker, phase information data for each phase selection closing / opening are monitored and collected; by installing displacement sensors, speed sensors and force sensors on the circuit breaker, mechanical property data during operation of the circuit breaker are monitored and collected; by deploying vibration sensors on key components of the circuit breaker, vibration signal feature data are monitored and collected, and the collected circuit breaker operation related data are subjected to data cleaning, data conversion and data integration, and then the circuit breaker operation related data are classified and stored in the database according to the collection time points, and the operation data for each opening and closing are recorded in the database.

[0162] It needs to be specifically pointed out that by deploying and installing the related sensors for collecting the circuit breaker operation related data on the corresponding positions of the circuit breaker, the related sensors for collecting the data mainly include voltage / current sensors, phase sensors, displacement sensors, speed sensors and vibration sensors, by respectively installing the current sensors and the voltage sensors on the power supply side and the load side of the circuit breaker and connecting them with the input end and the output end respectively; by selecting the phase difference sensor and installing it on the contact of the circuit breaker or other key positions which can reflect the phase change; then according to the mechanical motion characteristics of the circuit breaker, selecting appropriate displacement and speed sensors, installing the displacement sensor on the moving contact of the circuit breaker to monitor the displacement change, and installing the speed sensor on the component which can reflect the operating speed of the circuit breaker; by selecting the sensor suitable for monitoring the mechanical vibration, such as the accelerometer, and installing it on the bracket, base or contact of the circuit breaker; at the same time, checking whether the installation state of each sensor is firm and whether the working state of all sensors is normal; setting appropriate data collection frequency according to the monitoring requirements to collect the circuit breaker operation related data.

[0163] S2: based on the collected circuit breaker operation related data, analyzing the arc burning time, closing inrush current, closing resistance and phase selection function in the breaking process to obtain the breaking and closing performance monitoring index, so as to judge whether the breaking and closing performance of the circuit breaker is normal, and transmitting the analysis result of the abnormal breaking and closing performance to S6.

[0164] The S2 analyzes the arc burning time, closing inrush current, closing resistance and phase selection function in the breaking process by monitoring the voltage / current waveform data of each breaking and closing of the circuit breaker, and calculates the breaking and closing performance monitoring index to monitor the change of the breaking process of the circuit breaker in real time;

[0165] The specific analysis method of the breaking and closing performance monitoring index is:

[0166] Step S211: identifying the arc burning start and end time in the breaking process, and calculating the arc burning time as , wherein, represents the arc burning end time, represents the arc burning start time;

[0167] Step S212: identifying the inrush current start time and peak time in the closing operation, and calculating the inrush current change value as , wherein, represents the time when the inrush current drops to the steady state current, represents the inrush current start time, represents the inrush current peak value, represents the steady state current value;

[0168] Step S213: The resistance change rate of the closing resistance is calculated by analyzing the resistance change in the closing process through the waveform data of the current and voltage. wherein, denotes the time point denotes the resistance value of the closing resistance, denotes the time point denotes the resistance value of the closing resistance, denotes the time point denotes the time interval between the time point and the time point

[0169] Step S214: According to the analysis results of the arcing time, the closing inrush current and the closing resistance, the calculation formula of the opening and closing performance monitoring index is calculated as follows: wherein, denotes the actual opening and closing phase angle, denotes the predetermined opening and closing phase angle, is the weight coefficient;

[0170] By setting an opening and closing performance threshold , the opening and closing performance monitoring index is compared with the opening and closing performance threshold to determine whether the opening and closing performance of the circuit breaker is normal; if the opening and closing performance monitoring index the opening and closing performance threshold , it is determined that the opening and closing performance of the circuit breaker is normal, and the opening and closing performance of the circuit breaker is continuously monitored and analyzed, if the opening and closing performance monitoring index the opening and closing performance threshold , it is determined that the opening and closing performance of the circuit breaker is abnormal, and the analysis results at this time are transmitted to S6 for the evaluation of the service life of the circuit breaker.

[0171] It should be specifically noted that the setting of the opening and closing performance threshold is based on the technical specifications, industry standards, safety requirements and actual operation experience of the circuit breaker to determine a reasonable opening and closing performance threshold

[0172] The specific analysis method of the closing resistance rate is as follows:

[0173] Step 1: Firstly, the starting time of the closing operation ( ) and the completion time of the closing operation ( ) are recorded;

[0174] Step 2: In the closing process, two different time points ( and ) are selected, wherein , and both are between and ;

[0175] Step 3: Calculate the resistance value of the closing resistor at the two time points using Ohm's law and : , wherein, and are the voltage values at the time points and , respectively, and are the current values at the time points and , respectively;

[0176] Step 4: Based on the ratio of the absolute value of the resistance change at the two time points to the time interval, the closing resistor change rate r is calculated comprehensively.

[0177] S3: Based on the collected circuit breaker operation related data, analyze the operation of the phase selection function, obtain the phase selection performance offset index, and determine whether the phase selection function of the circuit breaker is normally operated, and transmit the analysis result of the abnormal phase selection function to S6.

[0178] The S3 analyzes the operation of the phase selection function by monitoring and recording the phase information data, voltage waveform parameters, and current waveform parameters of the 1st, 2nd, …, nth phase selection closing / opening, respectively,

[0179] The specific calculation formula of the phase selection performance offset index is: wherein, represents the phase offset of the i-th monitoring, represents the average value of the phase offsets of n times of monitoring, represents the voltage waveform deviation of the i-th monitoring, represents the average value of the voltage waveform deviations of n times of monitoring, represents the current waveform deviation of the i-th monitoring, represents the average value of the current waveform deviations of n times of monitoring, is a weight coefficient;

[0180] By setting a phase selection performance offset threshold , the phase selection performance offset index is compared with the phase selection performance offset threshold to determine whether the phase selection function of the circuit breaker is normally operated; if the phase selection performance offset index the phase selection performance offset threshold , it is determined that the phase selection function of the circuit breaker is normally operated, and if the phase selection performance offset index the phase selection performance offset threshold If the circuit breaker's phase selection function is found to be malfunctioning, an early warning feedback will be issued immediately, and the analysis results will be transmitted to S6.

[0181] It should be noted that this is based on the actual phase value recorded each time. Phase value with target The deviation between them is used to calculate the phase shift detected in the i-th monitoring. Based on the actual voltage waveform amplitude recorded each time. With the target voltage waveform amplitude The deviation between them is used to calculate the voltage waveform deviation of the i-th monitoring. Based on the actual current waveform amplitude recorded each time. With the target current waveform amplitude The deviation between them is used to calculate the voltage waveform deviation of the i-th monitoring. .

[0182] S4: Analyze the mechanical characteristics of the circuit breaker based on the collected data on its operation, obtain the mechanical characteristics performance change index, and thus determine whether the mechanical characteristics of the circuit breaker are normal. Transmit the analysis results of the abnormal mechanical characteristics to S6.

[0183] S4 analyzes the mechanical performance characteristics of the circuit breaker by monitoring its vibration signal characteristic data and calculates the mechanical performance change index. ,in, This represents the closing speed measured in the j-th measurement. This represents the average value of the measured closing speed. This represents the gate opening speed measured in the j-th measurement. This represents the average value of the measured gate opening speed. This represents the closing force measured in the j-th measurement. This represents the average value of the measured closing force. This represents the opening force measured in the j-th measurement. This represents the average value of the measured opening force. These are the weighting coefficients;

[0184] By setting a threshold for changes in mechanical characteristic performance The mechanical characteristic performance change index is compared with the mechanical characteristic performance change threshold to determine whether the mechanical characteristics of the circuit breaker are normal; if the mechanical characteristic performance change index... Mechanical characteristic performance change threshold If the mechanical characteristics of the circuit breaker are normal, then the monitoring and analysis of the mechanical characteristics of the circuit breaker will continue. If the mechanical characteristic performance change index... Mechanical characteristic performance change threshold If yes, it is determined that the mechanical characteristics of the circuit breaker are abnormal, and the analysis result is further evaluated and analyzed.

[0185] S5: Based on the collected circuit breaker operation related data, the change of the insulation performance of the circuit breaker during operation is analyzed, an insulation performance monitoring index is obtained, whether the insulation performance is abnormal is detected, and the analysis result of the insulation performance abnormality is transmitted to S6.

[0186] S5 uses an ultrasonic detector and an oil metal content analyzer to monitor and record the circuit breaker conventional partial discharge state data and metal particle operation state data in real time. The ultrasonic detector is used to detect the ultrasonic signal generated by the partial discharge, and the oil metal content analyzer is used to count and measure the number and size of metal particles in the oil or other medium, to analyze the change of the insulation performance of the circuit breaker during operation, and calculate the insulation performance monitoring index as Wherein, N represents the number of discharges currently monitored, represents the minimum value of the number of discharges monitored, represents the maximum value of the number of discharges monitored, L represents the discharge amount currently monitored, represents the minimum value of the discharge amount monitored, represents the maximum value of the discharge amount monitored, M represents the number of particles currently monitored, represents the minimum value of the number of particles monitored, represents the maximum value of the number of particles monitored, Y represents the size of the particles currently monitored, represents the minimum value of the size of the particles monitored, represents the maximum value of the size of the particles monitored;

[0187] By setting an insulation performance threshold , the insulation performance monitoring index is compared with the insulation performance threshold to detect whether the insulation performance is abnormal; if the insulation performance monitoring index The insulation performance threshold , it is considered that the insulation performance is within the normal range, and the insulation performance of the circuit breaker is continuously monitored and analyzed, if the insulation performance monitoring index The insulation performance threshold , it is considered that the insulation performance is abnormal, and the abnormal analysis detection result is transmitted to S6.

[0188] S6: Based on the breaking and closing performance monitoring index, phase selection performance deviation index, mechanical characteristic performance change index, and insulation performance monitoring index, the electrical life of the circuit breaker is comprehensively analyzed to obtain the electrical life evaluation coefficient, and the electrical life evaluation coefficient is transmitted to S7.

[0189] The specific formula for calculating the electrical lifetime assessment coefficient is as follows: , Indicates the break-in performance monitoring index. Indicates the phase selection performance offset index. Indicator of mechanical characteristic performance change index Indicates the insulation performance monitoring index, This represents the weighting coefficient.

[0190] S7: Compare the electrical life assessment coefficient with the preset electrical life threshold to assess the remaining electrical life of the circuit breaker.

[0191] The determination of the electrical lifetime threshold in S7 is based on experimental verification and historical data analysis. If the electrical lifetime assessment coefficient K... Electrical lifetime threshold If the electrical life assessment coefficient K is within the normal operating condition, then the circuit breaker is determined to be in normal operating condition. Electrical lifetime threshold If the circuit breaker's electrical life is declining, the monitoring cycle should be shortened, and repair or replacement should be prepared.

[0192] S8: Based on the results of electrical life assessment, provide maintenance strategies and overhaul times, and send the maintenance strategies and overhaul times to the testing personnel's terminal.

[0193] The S8 feeds back the circuit breaker life assessment results to the inspection personnel terminal and automatically generates an assessment report based on the electrical life assessment analysis results. The report indicates the maintenance strategy and overhaul time, and at the same time, it regularly updates and records the latest electrical life assessment results.

[0194] like Figure 2 As shown, the present invention also provides a high-voltage circuit breaker condition monitoring and evaluation system. This system is used to implement the high-voltage circuit breaker condition monitoring and evaluation method described above. The high-voltage circuit breaker condition monitoring and evaluation system includes:

[0195] The data acquisition module is used to collect the operating data of the circuit breaker.

[0196] The analysis and generation module calculates the engagement / disengagement performance monitoring index based on operational data. Phase selection performance deviation index Mechanical characteristic performance change index and insulation performance monitoring index , based on the breaking performance monitoring index , the phase selection performance offset index , the mechanical characteristic performance change index and the insulation performance monitoring index , to generate an electrical life evaluation coefficient;

[0197] The comparison and evaluation module is used to compare the electrical life evaluation coefficient with a preset electrical life threshold value, and generate a residual electrical life evaluation result of the circuit breaker.

[0198] The feedback module generates a maintenance strategy and an overhaul time according to the electrical life evaluation result.

[0199] In the embodiment, the high-voltage circuit breaker state monitoring and evaluation system includes a data acquisition module, an analysis and generation module (calculating four types of indexes and an electrical life coefficient), a comparison and evaluation module (comparing with a threshold value), and a feedback module (generating a maintenance strategy and sending it to a terminal).

[0200] The existing monitoring system is mostly scattered single-point monitoring, lacking integrated processes.

[0201] The embodiment realizes full-process automation through "module division and collaborative linkage", the data acquisition module provides basic data, the analysis and generation module completes core calculation, the comparison and evaluation module outputs the state, and the feedback module connects the terminal.

[0202] The modules are independent and collaborative, and can be upgraded respectively (such as adding new sensors to the data acquisition module), improving the system expansibility; the terminal push function enables maintenance personnel to obtain the strategy in real time, solving the problem of low efficiency of traditional manual summary.

[0203] The embodiment realizes the automation and integration of circuit breaker state evaluation, improves the evaluation efficiency, ensures the timely communication of the maintenance strategy, and supports the rapid response to maintenance needs.

[0204] The following is a specific embodiment of a high-voltage circuit breaker state monitoring and evaluation system of the application, in which the high-voltage circuit breaker state monitoring and evaluation system includes a related data acquisition module, an analysis and generation module (the analysis and generation module can include a circuit breaker breaking and closing performance analysis module, a circuit breaker phase selection performance monitoring module, a mechanical characteristic comprehensive monitoring module, an insulation performance comprehensive analysis module, and an electrical life evaluation coefficient calculation module), an electrical life evaluation module, and a result feedback module.

[0205] The related data acquisition module is connected with the circuit breaker breaking and closing performance analysis module.

[0206] The related data acquisition module is connected with the circuit breaker phase selection performance monitoring module.

[0207] The relevant data acquisition module is connected with the mechanical characteristic comprehensive monitoring module,

[0208] The relevant data acquisition module is connected with the insulation performance comprehensive analysis module,

[0209] The circuit breaker opening and closing performance analysis module is connected with the electrical life evaluation coefficient calculation module,

[0210] The circuit breaker phase selection performance monitoring module is connected with the electrical life evaluation coefficient calculation module,

[0211] The mechanical characteristic comprehensive monitoring module is connected with the electrical life evaluation coefficient calculation module,

[0212] The insulation performance comprehensive analysis module is connected with the electrical life evaluation coefficient calculation module,

[0213] The electrical life evaluation coefficient calculation module is connected with the electrical life evaluation module,

[0214] The electrical life evaluation module is connected with the result feedback module.

[0215] The relevant data acquisition module monitors and acquires the circuit breaker operation related data through a data acquisition tool, and pre-processes and stores the acquired circuit breaker operation related data;

[0216] The circuit breaker opening and closing performance analysis module analyzes the arc time, closing inrush current, closing resistance and phase selection function in the opening process based on the acquired circuit breaker operation related data, obtains the opening and closing performance monitoring index, and judges whether the opening and closing performance of the circuit breaker is normal;

[0217] The circuit breaker phase selection performance monitoring module analyzes the phase selection function operation based on the acquired circuit breaker operation related data, obtains the phase selection performance deviation index, and judges whether the phase selection function of the circuit breaker is normally operated;

[0218] The mechanical characteristic comprehensive monitoring module analyzes the mechanical characteristic performance of the circuit breaker based on the acquired circuit breaker operation related data, obtains the mechanical characteristic performance change index, and judges whether the mechanical characteristic of the circuit breaker is normal;

[0219] The insulation performance comprehensive analysis module analyzes the change of the insulation performance of the circuit breaker during operation based on the acquired circuit breaker operation related data, obtains the insulation performance monitoring index, and detects whether the insulation performance is abnormal;

[0220] The electrical life evaluation coefficient calculation module performs comprehensive analysis on the electrical life of the circuit breaker based on the breaking and closing performance monitoring index, the phase selection performance offset index, the mechanical characteristic performance change index and the insulation performance monitoring index, to obtain the electrical life evaluation coefficient;

[0221] The electrical life evaluation module is used for comparing the electrical life evaluation coefficient with a preset electrical life threshold value, to evaluate the remaining electrical life of the circuit breaker.

[0222] The result feedback module gives a maintenance strategy and an overhaul time based on the result of the electrical life evaluation, and sends the maintenance strategy and the overhaul time to a detection personnel terminal.

[0223] The prior art has two core defects:

[0224] Unilateral data acquisition and analysis: only single-dimensional data (such as only electrical parameters or mechanical vibration) are monitored, and multiple factors such as breaking and closing performance, phase selection accuracy, mechanical characteristics and insulation state are not integrated, so that the specific fault cause cannot be located;

[0225] Single electrical life evaluation: the life is estimated based on a single parameter (such as cumulative breaking current), and multiple performance indicators are not integrated, resulting in large evaluation error.

[0226] The technical solution of the present application breaks through the above limitations, and its main features are:

[0227] Multi-dimensional data fusion evaluation framework:

[0228] The breaking and closing performance of the circuit breaker is creatively disassembled into four core dimensions of "breaking and closing performance, phase selection performance, mechanical characteristic performance and insulation performance", and through the acquisition of multi-source data such as breaking and closing waveform, phase selection phase, mechanical characteristics and vibration signal, the overall coverage of the circuit breaker state is realized, and the problem of "single data monitoring unilateralism" of the prior art is solved.

[0229] For each dimension, a dedicated quantitative index is designed, such as a breaking and closing performance monitoring index that integrates parameters such as arcing time, inrush current and resistance change rate, and an insulation performance monitoring index that integrates discharge frequency, particle quantity and size, which converts scattered physical quantities into comparable quantitative indicators, laying a foundation for comprehensive evaluation.

[0230] Multi-index coupled electrical life evaluation model:

[0231] The four performance indexes are creatively fused by an exponential function, and the sensitivity of the exponential function is used to amplify the influence of performance degradation, solving the problem of "large evaluation error of single parameter" of the prior art.

[0232] The dynamic threshold comparison mechanism is introduced, the state is judged according to the relationship between the electrical life evaluation coefficient and the threshold, and the monitoring period is adjusted, so that the leap from the fixed period monitoring to the dynamic accurate monitoring is realized, instead of the static evaluation logic in the prior art.

[0233] The prior art has an evaluation error of electrical life usually exceeding 20% due to single factor analysis; the error can be controlled within 10% (based on the sensitivity of the formula to abnormal parameters) through multi-dimensional index fusion, so that the accuracy of the remaining electrical life evaluation is significantly improved.

[0234] Fault diagnosis and maintenance efficiency optimization:

[0235] The prior art is difficult to locate the specific fault reason, resulting in blind repair (cost increase of more than 30%); the fault source can be directly identified through single analysis of the four indexes, i.e. whether the fault is caused by breakage abnormality, phase selection deviation, mechanical wear or insulation deterioration (such as breakage performance index abnormality, which locks the electrical circuit problem), targeted repair is realized, and the cost is reduced.

[0236] Based on the evaluation result, a maintenance strategy is generated and the monitoring period is dynamically adjusted, so that the problem of "excessive monitoring or insufficient monitoring" in the prior art is avoided, and the maintenance efficiency is improved.

[0237] The system integrates and automates the closed-loop system of "data acquisition-index calculation-life evaluation-strategy feedback", the maintenance strategy is pushed through the terminal, the whole process automation from monitoring to maintenance is realized, and the problem of low efficiency of traditional manual evaluation is solved.

[0238] The present application overcomes the one-sidedness and single defect of the prior art through the technical scheme of "multi-dimensional index quantification-multi-factor fusion evaluation-dynamic strategy generation".

[0239] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described devices, apparatuses and units can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0240] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for condition monitoring and evaluation of high-voltage circuit breakers, characterized in that, include: Collect circuit breaker operating data; Calculate the engagement / disengagement performance monitoring index based on operational data. Phase selection performance offset index Mechanical characteristic performance change index and insulation performance monitoring index ; Based on the break-opening performance monitoring index Phase selection performance offset index Mechanical characteristic performance change index and insulation performance monitoring index Calculate electrical life assessment coefficients ; Electrical life assessment coefficient Compared with the preset electrical lifetime threshold Compare and generate remaining electrical lifetime assessment results; Based on the electrical life assessment results, maintenance strategies and overhaul schedules are generated and sent to the testing personnel's terminals. The break-in performance monitoring index The calculation formula is: ， in, This indicates the actual opening and closing phase angle. Indicates the predetermined opening and closing phase angle. These are the weighting coefficients; Arc time , Indicates the moment when the arc terminates. Indicates the moment of arc initiation; Inrush Change Value , This indicates the moment when the inrush current drops to the steady-state current. Indicates the start time of the surge. Indicates the peak flow rate. This represents the steady-state current value. and These are the weighting coefficients; Closing resistance change rate , Indicates a point in time The resistance value of the closing resistor. Indicates a point in time The resistance value of the closing resistor. Indicates a point in time With time point The time interval; The phase selection performance deviation index The specific calculation formula is as follows: ， in, This represents the phase shift detected in the i-th instance. This represents the average phase shift value detected n times. This represents the voltage waveform deviation detected in the i-th measurement. This represents the average deviation of the voltage waveform detected n times. This represents the deviation of the current waveform detected in the i-th instance. This represents the average deviation of the current waveform detected n times. These are the weighting coefficients; The mechanical characteristic performance change index The specific calculation formula is as follows: ， in, This represents the closing speed measured in the j-th measurement. This represents the average value of the measured closing speed. This represents the gate opening speed measured in the j-th measurement. This represents the average value of the measured gate opening speed. This represents the closing force measured in the j-th measurement. This represents the average value of the measured closing force. This represents the opening force measured in the j-th measurement. This represents the average value of the measured opening force. These are the weighting coefficients; The insulation performance monitoring index The calculation formula is: ， in, This indicates the number of discharges currently detected. This represents the minimum number of discharges detected. This indicates the maximum number of discharges monitored. This indicates the amount of discharge currently being monitored. This indicates the minimum amount of discharge detected. This indicates the maximum monitored discharge amount. This indicates the number of particles currently detected. This represents the minimum number of particles detected. This indicates the maximum number of particles detected. This indicates the size of the currently detected particles. This represents the minimum size of the detected particles. This indicates the maximum size of the particles detected.

2. The high-voltage circuit breaker condition monitoring and evaluation method according to claim 1, characterized in that, The collected circuit breaker operating data includes: Collect voltage / current waveform data for opening and closing the circuit breaker; Collect phase selection closing / opening phase information; Collect mechanical characteristic data; Collect vibration signal data; After cleaning, transforming, and integrating the data, it is categorized and stored in the database.

3. The method for condition monitoring and evaluation of high-voltage circuit breakers according to claim 1, characterized in that, The electrical lifetime assessment coefficient The specific calculation formula is as follows: ， Where exp represents an exponential function with base e, and ln represents the natural logarithm. Indicates the break-opening performance monitoring index. Indicates the phase selection performance offset index. Indicator of mechanical characteristic performance change index Indicates the insulation performance monitoring index, This represents the weighting coefficient.

4. The method for condition monitoring and evaluation of high-voltage circuit breakers according to claim 1, characterized in that, Electrical life assessment coefficient Compared with the preset electrical lifetime threshold The remaining electrical lifetime assessment results include: if the electrical lifetime assessment coefficient... Electrical lifetime threshold If the circuit breaker is deemed to be functioning normally, and the electrical life assessment coefficient is [not specified]... Electrical lifetime threshold If so, the electrical life of the circuit breaker is determined to be degraded and the monitoring cycle is shortened.

5. The high-voltage circuit breaker condition monitoring and evaluation method according to claim 1, characterized in that, After generating maintenance strategies and overhaul schedules based on electrical life assessment results, the following also includes: Regularly update and record the latest electrical lifetime assessment results.

6. A high-voltage circuit breaker condition monitoring and evaluation system, used to implement the high-voltage circuit breaker condition monitoring and evaluation method as described in any one of claims 1-5, characterized in that, include: The data acquisition module is used to collect the operating data of the circuit breaker. The analysis and generation module calculates the engagement / disengagement performance monitoring index based on operational data. Phase selection performance offset index Mechanical characteristic performance change index and insulation performance monitoring index Based on the break-opening performance monitoring index Phase selection performance offset index Mechanical characteristic performance change index and insulation performance monitoring index Generate electrical lifetime assessment coefficients; The comparison and evaluation module is used to compare the electrical life evaluation coefficient with the preset electrical life threshold to generate the remaining electrical life evaluation result of the circuit breaker. The feedback module generates maintenance strategies and overhaul schedules based on the electrical life assessment results.

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