On-line detection and residual life evaluation method and system for switch operating mechanism of ring network box

Abstract

The present application belongs to the technical field of intelligent power grid equipment measurement and detection, and particularly relates to a ring network box switch operating mechanism online detection and residual life evaluation method and system. Three types of signals, i.e., moving contact displacement trajectory, opening coil current and energy storage motor power supply current, are synchronously collected by a data acquisition unit. A stroke speed characteristic analysis unit, an electromagnet core action analysis unit and an energy storage state analysis unit are used to extract stroke speed deviation index, electromagnet core state deviation index and energy storage state deviation index, respectively. The full-link state of the operating mechanism from energy storage, electromagnetic drive to mechanical transmission is completely covered, and the one-sidedness of single parameter evaluation is avoided. After obtaining the mechanical state deviation index, the comprehensive deviation calculation unit introduces the energy storage state deviation index for correction, and the final comprehensive state deviation index can truly reflect the deterioration effect of energy storage spring performance decline on the opening action characteristics, overcoming the defects of the existing method of splitting the two.

Description

Technical Field

[0001] This invention belongs to the field of smart grid equipment measurement and testing technology, specifically relating to a method and system for online testing and remaining life assessment of ring main unit switch operating mechanisms. Background Technology

[0002] Existing technologies for life detection of ring main unit switch operating mechanisms generally suffer from shortcomings such as single detection dimensions, coarse evaluation models, and the lack of electrical parameter coupling correction mechanisms. These shortcomings fail to meet the requirements for high-precision online monitoring and quantitative life assessment. Current mainstream solutions rely solely on the cumulative number of switch actions to estimate fixed uniform life loss or simply detect mechanical displacement parameters. They do not introduce measured electrical variables to jointly characterize the mechanism's operating state and ignore the strong coupling relationship between electrical characteristics such as trip coil current and energy storage motor power supply current and mechanical degradation. This results in the inability to identify hidden losses caused by electromagnetic drive anomalies and fluctuations in energy storage conditions, leading to significant deviations between life assessment results and actual operating conditions. Furthermore, existing technologies lack the core evaluation logic of multi-dimensional deviation index hierarchical calculation and electrical parameter correction of mechanical losses. They cannot quantify and distinguish the differentiated degradation degree of a single action and lack fault-tolerant calculation mechanisms for abnormal waveforms and missing data of measured electrical variables. They also fail to incorporate equipment failure data for fitting and optimization, making it impossible to achieve fault mode classification, identification, and accurate early warning.

[0003] To address the aforementioned issues, this application presents a method and system for online detection and remaining life assessment of the operating mechanism of a ring mains switch. Summary of the Invention

[0004] To address the shortcomings of the prior art mentioned in the background section, this application proposes an online detection and remaining life assessment method and system for ring main unit switch operating mechanisms. By establishing a comprehensive assessment system that integrates measured electrical variables and mechanical parameters, and through multi-dimensional state parameter joint analysis, deviation classification calculation, and dynamic life correction strategy, it effectively improves the problems of one-sided assessment, insufficient accuracy, and poor adaptability to working conditions in traditional schemes, thereby solving the problems in the background section.

[0005] Firstly, to achieve the above objectives, this application provides a method for online detection and remaining life assessment of the operating mechanism of a ring mains switch, which includes the following specific steps: S1. Collect the moving contact displacement trajectory, tripping coil current and energy storage motor power supply current during each tripping action; S2. Extract the moving contact stroke and moving contact speed from the moving contact displacement trajectory, and calculate the stroke speed deviation index for this action; S3. Extract the electromagnet core contact time from the trip coil current and calculate the electromagnet core state deviation index for this action. S4. Extract the starting current multiple from the energy storage motor power supply current and calculate the energy storage state deviation index of the operation cycle to which this action belongs. S5. Add the stroke speed deviation index to the electromagnet core state deviation index to obtain the mechanical state deviation index of this action. Then, use the energy storage state deviation index to correct the mechanical state deviation index to obtain the comprehensive state deviation index of this action and record and store it. S6. Update the total actual lifespan consumption according to the comprehensive state deviation index of each action. The total actual lifespan consumption is monotonically reduced with the number of actions. Calculate the predicted number of remaining actions based on this. When the total actual lifespan consumption reaches the maximum consumption limit or the comprehensive state deviation index exceeds the maximum allowable value, lifespan is determined to end. The health status level is classified according to the comprehensive state deviation index and an early warning signal is output.

[0006] Based on the above scheme, step S2 specifically includes the following steps: S21. Extract the measured value of the moving contact stroke from the moving contact displacement trajectory, and calculate the ratio of the absolute value of the deviation between the measured stroke value and the standard value to the standard value, which is used as the stroke deviation rate. S22. Extract the measured average velocity of the moving contact from the displacement trajectory of the moving contact, and calculate the ratio of the absolute value of the deviation between the measured velocity value and the standard value to the standard value, which is used as the velocity deviation rate. S23. The stroke deviation rate and speed deviation rate are weighted and summed to obtain the stroke and speed deviation index of this action.

[0007] Based on the above scheme, step S3 specifically includes the following steps: S31. Extract the current start time and current peak time from the current waveform of the trip coil, and use the time between the current start time and the current peak time as the electromagnet core contact time. S32. Calculate the ratio of the absolute value of the deviation between the measured value and the standard value of the electromagnet core's contact time to the standard value, and use it as the electromagnet core's state deviation index.

[0008] Based on the above scheme, step S4 specifically includes the following steps: S41. Extract the steady-state value and peak value of the current from the power supply current of the energy storage motor, and calculate the ratio of the peak value of the current to the steady-state value of the current as the measured starting current multiple. S42. Calculate the ratio of the absolute value of the deviation between the measured starting current multiple and the standard starting current multiple to the standard starting current multiple, and use it as the energy storage state deviation index.

[0009] In a preferred embodiment based on the above scheme, step S5 specifically includes the following steps: S51. Add the stroke speed deviation index and the electromagnet core state deviation index to obtain the mechanical state deviation index of this action. S52. Set a threshold for acceptable energy storage status. When the energy storage status deviation index is less than or equal to this threshold, the energy storage status is determined to be normal, and the overall status deviation index of this action is equal to the mechanical status deviation index. When the energy storage status deviation index is greater than this threshold, the energy storage status is determined to be abnormal, and the overall status deviation index of this action is... The calculation formula is: ; in, This is the mechanical condition deviation index. PF is the energy storage state deviation index, PF is the energy storage state qualification threshold and its value is greater than zero, and α is the preset compensation coefficient and α is greater than zero. S53. Record and store the calculated comprehensive state deviation index.

[0010] In a preferred embodiment based on the above scheme, step S6 specifically includes the following steps: S61. Set the design mechanical life cycles Nd of the operating mechanism, then the basic life consumption per single action is: ; S62. Set the maximum permissible value of the comprehensive state deviation index. And the preset acceleration coefficient β, the single lifespan consumption for the k-th action. The calculation is performed using the following formula: ; in, Let be the comprehensive state deviation index of the k-th action record, and ; S63, Total actual service life consumption of the operating mechanism The update formula is: ; in, This represents the total actual lifespan consumption accumulated after the (k-1)th action, which is the total lifespan consumption accumulated by all previous actions before the start of the kth action. This indicates that no consumption occurred when the system was put into operation; S64, Based on actual total lifespan consumption The calculation results are used to calculate the predicted value of the remaining number of actions. The calculation formula is: ; Wherein, Nd represents the design mechanical life cycles of the operating mechanism; S65. Perform threshold comparison: when the actual total lifespan consumption... Greater than or equal to 1, or when the comprehensive state deviation index of any action is greater than or equal to the maximum permissible value of the comprehensive state deviation index. When the operating mechanism has reached the end of its service life, the predicted number of remaining operable operations is zero. S66. Based on the magnitude of the comprehensive state deviation index, the health status of the operating mechanism is divided into three levels: healthy, alert, and abnormal. When the comprehensive state deviation index is less than a preset multiple of the energy storage state qualification threshold, it is considered healthy; when it is greater than or equal to the preset multiple but less than the maximum allowable value, it is considered alert; when it is greater than or equal to the maximum allowable value, it is considered abnormal. When the comprehensive state deviation index continues to increase, it is determined that the operating mechanism has a progressive degradation fault mode. When the comprehensive state deviation index suddenly jumps, it is determined that there is a sudden fault mode.

[0011] Based on the above scheme, the preferred output method of the warning signal in step S6 is as follows: obtain historical operating data of the same type of operating mechanism, take the cumulative number of actions of the failed equipment as the failure life sample, take the cumulative number of actions of the unfailed equipment as the right censored sample, and use the maximum likelihood method to fit the Weibull distribution to obtain the cumulative number of actions corresponding to the median life. The median remaining number of actions is obtained by subtracting the current number of actions from the cumulative number of actions corresponding to the median lifetime. If the median remaining number of actions is negative, it is treated as zero. Eighty percent of the median remaining number of actions is used as the first warning threshold, and forty percent of the median remaining number of actions is used as the second warning threshold. When historical data samples are insufficient, the initial first warning threshold is the number of times the designed mechanical life is multiplied by the first preset experience ratio, and the initial second warning threshold is the number of times the designed mechanical life is multiplied by the second preset experience ratio. The first preset experience ratio is greater than the second preset experience ratio. After the data is accumulated, the warning threshold is updated according to the above method. The predicted number of remaining actionable actions is compared with the first warning threshold and the second warning threshold. If the predicted value is greater than the first warning threshold, no warning signal is issued; if the predicted value is less than or equal to the first warning threshold but greater than the second warning threshold, an attention warning signal is issued; if the predicted value is less than or equal to the second warning threshold, a danger warning signal is issued.

[0012] Secondly, this application provides an online detection and remaining life assessment system for the operating mechanism of a ring main unit switch, including a data acquisition unit, a stroke speed characteristic analysis unit, an electromagnet core motion analysis unit, an energy storage status analysis unit, a comprehensive deviation calculation unit, a health assessment and life prediction unit, and an early warning output unit; The data acquisition unit is used to execute step S1, and to acquire the moving contact displacement trajectory, the tripping coil current and the energy storage motor power supply current during each tripping action. The stroke speed characteristic analysis unit is used to execute step S2, extract the stroke and speed of the moving contact from the moving contact displacement trajectory, and calculate the stroke speed deviation index of this action; The electromagnet core action analysis unit is used to execute step S3, extract the electromagnet core contact time from the trip coil current, and calculate the electromagnet core state deviation index for this action. The energy storage state analysis unit is used to execute step S4, extract the starting current multiple from the energy storage motor power supply current, and calculate the energy storage state deviation index of the operation cycle to which this action belongs. The comprehensive deviation calculation unit is used to execute step S5, add the stroke speed deviation index and the electromagnet core state deviation index to obtain the mechanical state deviation index of this action, and then use the energy storage state deviation index to correct the mechanical state deviation index to obtain the comprehensive state deviation index of this action and record and store it. The health assessment and life prediction unit is used to execute step S6, which updates the total actual life consumption and calculates the predicted value of the remaining number of actions based on the comprehensive state deviation index of each action. When the total actual life consumption reaches the maximum consumption limit or the comprehensive state deviation index exceeds the maximum allowable value, the life is determined to end. The health status level is divided according to the comprehensive state deviation index, and the predicted value and level information are transmitted to the early warning output unit. The early warning output unit is used to compare the received predicted value of the remaining number of actions with a preset first early warning threshold and a second early warning threshold, and issue a corresponding early warning signal based on the comparison result.

[0013] Thirdly, this application provides an electronic device, including: a processor and a memory, wherein the memory stores a computer program that can be called by the processor; The processor executes the above-described method for online detection and remaining life assessment of the ring main unit switch operating mechanism by calling the computer program stored in the memory.

[0014] Fourthly, this application provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the above-described method for online detection and remaining life assessment of the ring main unit switch operating mechanism.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention simultaneously collects data such as the displacement trajectory of the moving contact, the current of the trip coil, and the power supply current of the energy storage motor. Based on the measured electrical variables, it extracts key electrical characteristics such as the contact time of the electromagnet core and the multiple of the motor starting current. Combined with mechanical stroke and speed characteristics, it conducts multi-dimensional analysis, which can simultaneously cover the degradation state of the mechanical transmission structure and the electrical drive circuit. It makes up for the shortcomings of single mechanical detection in being unable to identify electrical hidden defects, and makes the equipment status perception more comprehensive.

[0016] 2. This invention calculates the travel speed deviation, electromagnet core state deviation, and energy storage state deviation in steps, first integrates them to obtain the mechanical state deviation, and then uses the measured electrical variable deviation corresponding to energy storage to correct the overall state. It calculates the comprehensive state deviation index for different scenarios and dynamically adjusts the life consumption of a single action in combination with the real-time state deviation. It can adaptively update the life loss according to the actual degree of equipment degradation, which can effectively improve the problem of low accuracy of the traditional unified conversion method. The remaining life prediction result is more in line with the actual operating conditions of the equipment.

[0017] 3. This invention sets up corresponding adaptive calculation rules for scenarios where measured electrical variables and mechanical displacement parameters are abnormal or missing. This can ensure the normal operation of the evaluation process when a single type of parameter fails, and improve the stability of system operation. At the same time, for maintenance scenarios such as routine equipment maintenance and replacement of key components, a life inheritance coefficient is introduced, which can reasonably reset the initial life data according to the maintenance level, forming a continuous periodic evaluation, which is more in line with the actual work scenarios of on-site maintenance and operation.

[0018] 4. This invention can distinguish between two failure evolution modes: gradual degradation and sudden anomaly, based on the changing trend of the comprehensive state deviation index. This facilitates maintenance personnel in understanding the equipment deterioration mechanism. Simultaneously, by fitting a Weibull distribution to historical equipment failure data, it dynamically optimizes the early warning threshold. When historical samples are insufficient, it can rely on empirical proportions to set a minimum threshold. By dividing warning levels into attention and danger levels through two-level thresholds and outputting warning signals in a tiered manner, it provides effective data support for maintenance planning. Furthermore, it enables online real-time monitoring of the operating status of the operating mechanism and dynamic iterative updates of its remaining lifespan. This effectively reduces the workload of manual inspections, lowers the frequency of blind power outages for maintenance, and helps improve the overall lifecycle maintenance management level of distribution network switchgear. It also possesses good engineering application adaptability. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall process of the online detection and remaining life assessment method for the ring main unit switch operating mechanism of the present invention; Figure 2This is a flowchart illustrating step S2 in the online detection and remaining life assessment method for the ring main unit switch operating mechanism of the present invention. Figure 3 This is a schematic diagram of the framework of the online detection and remaining life assessment system for the ring main unit switch operating mechanism of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: To address the technical problems raised in the background art, this application provides a preferred embodiment: such as Figure 1 - Figure 3 As shown, the method for online detection and remaining life assessment of the operating mechanism of a ring main unit includes the following specific steps: S1. Collect the moving contact displacement trajectory, tripping coil current and energy storage motor power supply current during each tripping action; It should be noted that the data acquisition unit includes a displacement sensor installed at the moving contact link, a Hall current sensor connected in series in the power supply circuit of the trip coil, and a current sensor connected in series in the power supply circuit of the energy storage motor. In step S1, the data acquisition unit starts acquiring data synchronously when each trip action is triggered. The displacement trajectory of the moving contact is acquired by the displacement sensor installed at the moving contact link, the current of the trip coil is acquired by the Hall current sensor connected in series in the power supply circuit of the trip coil, and the power supply current of the energy storage motor is acquired by the current sensor connected in series in the power supply circuit of the energy storage motor. In practical engineering applications, the data acquisition unit is triggered when a sudden current rise in the power supply circuit of the trip coil occurs as the trigger signal. The condition for determining the sudden current rise is that the instantaneous current value exceeds the preset noise threshold. After detecting the trigger signal, the data acquisition unit synchronously starts the acquisition of three signals. In order to fully capture the movement process of the moving contact and the subsequent energy storage action of the energy storage motor, the sampling frequency is set in the range of several kilohertz. The duration of a single acquisition should be able to fully cover one trip operation and the subsequent energy storage process. The three signals are controlled by the same trigger signal and the time consistency of the data is ensured by hardware synchronous sampling or software timestamp alignment. S2. Extract the moving contact stroke and moving contact speed from the moving contact displacement trajectory, and calculate the stroke speed deviation index for this action; S3. Extract the electromagnet core contact time from the trip coil current and calculate the electromagnet core state deviation index for this action. S4. Extract the starting current multiple from the energy storage motor power supply current and calculate the energy storage state deviation index of the operation cycle to which this action belongs. S5. Add the stroke speed deviation index to the electromagnet core state deviation index to obtain the mechanical state deviation index of this action. Then, use the energy storage state deviation index to correct the mechanical state deviation index to obtain the comprehensive state deviation index of this action and record and store it. S6. Update the total actual lifespan consumption according to the comprehensive state deviation index of each action. The total actual lifespan consumption is monotonically reduced with the number of actions. Calculate the predicted number of remaining actions based on this. When the total actual lifespan consumption reaches the maximum consumption limit or the comprehensive state deviation index exceeds the maximum allowable value, lifespan is determined to end. The health status level is classified according to the comprehensive state deviation index and an early warning signal is output.

[0022] Furthermore: In an optional embodiment, step S2 specifically includes the following steps: S21. Extract the measured value of the moving contact stroke from the moving contact displacement trajectory, and calculate the ratio of the absolute value of the deviation between the measured stroke value and the standard value to the standard value, which is used as the stroke deviation rate. S22. Extract the measured average velocity of the moving contact from the displacement trajectory of the moving contact, and calculate the ratio of the absolute value of the deviation between the measured velocity value and the standard value to the standard value, which is used as the velocity deviation rate. S23. The stroke deviation rate and speed deviation rate are weighted and summed to obtain the stroke and speed deviation index for this action; It should be noted that the weighting coefficient for the stroke deviation rate is greater than that for the speed deviation rate. In practical engineering applications, the weighting coefficients for the stroke deviation rate and the speed deviation rate can be determined by the following method: obtain historical motion data samples of the same type of operating mechanism under normal conditions and various known fault conditions, calculate the stroke deviation rate and speed deviation rate for each sample, take the actual health status or remaining life of the operating mechanism as the target variable, and use linear regression or least squares fitting methods to determine the combination of weighting coefficients that makes the correlation between the stroke and speed deviation indices optimal and the target variable. When historical data is lacking, it can be initially set based on experience according to the principle that the weight of the stroke deviation rate is greater than that of the speed deviation rate, and iteratively updated after subsequent data accumulation.

[0023] In an optional embodiment, step S3 specifically includes the following steps: S31. Extract the current start time and current peak time from the current waveform of the trip coil, and use the time between the current start time and the current peak time as the electromagnet core contact time. S32. Calculate the ratio of the absolute value of the deviation between the measured value and the standard value of the electromagnet core's contact time to the standard value, and use it as the electromagnet core's state deviation index.

[0024] It should be noted that: the standard values ​​involved in the plan are based on the arithmetic mean of several consecutive measured values ​​of the operating mechanism when the mechanical characteristics are confirmed to be qualified during the initial operation or after maintenance. The same standard value is only applicable to the operating mechanism of the same model, specification and rated parameters. If the model of the mechanism is changed, it must be recalibrated. When the ambient temperature or power supply voltage exceeds the preset range, the measured values ​​should be normalized according to the pre-calibrated temperature or voltage correction curve before comparison. When key components are replaced during maintenance or the cumulative number of actions reaches the set value, the standard value should be recalibrated.

[0025] In an optional embodiment, step S4 specifically includes the following steps: S41. Extract the steady-state value and peak value of the current from the power supply current of the energy storage motor, and calculate the ratio of the peak value of the current to the steady-state value of the current as the measured starting current multiple. S42. Calculate the ratio of the absolute value of the deviation between the measured starting current multiple and the standard starting current multiple to the standard starting current multiple, and use it as the energy storage state deviation index.

[0026] In an optional embodiment, step S5 specifically includes the following steps: S51. Add the stroke speed deviation index and the electromagnet core state deviation index to obtain the mechanical state deviation index of this action. S52. Set a threshold for acceptable energy storage status. When the energy storage status deviation index is less than or equal to this threshold, the energy storage status is determined to be normal, and the overall status deviation index of this action is equal to the mechanical status deviation index. When the energy storage status deviation index is greater than this threshold, the energy storage status is determined to be abnormal, and the overall status deviation index of this action is... The calculation formula is: ; in, This is the mechanical condition deviation index. PF is the energy storage state deviation index, PF is the energy storage state qualification threshold and its value is greater than zero, and α is the preset compensation coefficient and α is greater than zero. S53. Record and store the calculated comprehensive state deviation index.

[0027] In an optional embodiment, step S6 specifically includes the following steps: S61. Set the design mechanical life cycles Nd of the operating mechanism, then the basic life consumption per single action is: ; S62. Set the maximum permissible value of the comprehensive state deviation index. And the preset acceleration coefficient β, the single lifespan consumption for the k-th action. The calculation is performed using the following formula: ; in, Let be the comprehensive state deviation index of the k-th action record, and ; S63, Total actual service life consumption of the operating mechanism The update formula is: ; in, This represents the total actual lifespan consumption accumulated after the (k-1)th action, which is the total lifespan consumption accumulated by all previous actions before the start of the kth action. This indicates that no consumption occurred when the system was put into operation; S64, Based on actual total lifespan consumption The calculation results are used to calculate the predicted value of the remaining number of actions. The calculation formula is: ; Wherein, Nd represents the design mechanical life cycles of the operating mechanism; S65. Perform threshold comparison: when the actual total lifespan consumption... Greater than or equal to 1, or when the comprehensive state deviation index of any action is greater than or equal to the maximum permissible value of the comprehensive state deviation index. When the operating mechanism has reached the end of its service life, the predicted number of remaining operable operations is zero. S66. Based on the magnitude of the comprehensive state deviation index, the health status of the operating mechanism is divided into three levels: healthy, alert, and abnormal. When the comprehensive state deviation index is less than a preset multiple of the energy storage state qualification threshold, it is considered healthy; when it is greater than or equal to the preset multiple but less than the maximum allowable value, it is considered alert; when it is greater than or equal to the maximum allowable value, it is considered abnormal. When the comprehensive state deviation index continues to increase, it is determined that the operating mechanism has a progressive degradation fault mode; when the comprehensive state deviation index suddenly jumps, it is determined that there is a sudden fault mode.

[0028] It should be noted that: when the energy storage motor power supply current is missing or invalid after being eliminated by abnormal waveforms, the comprehensive state deviation index of this action is equal to the mechanical state deviation index; when the trip coil current is missing or invalid after being eliminated by abnormal waveforms, the electromagnet core state deviation index is not included in the calculation of the mechanical state deviation index; when the moving contact displacement trajectory is missing or invalid after being eliminated by abnormal waveforms, this action is not included in the update of the actual total life consumption, and a sensor fault alarm is output. After the operating mechanism is repaired or key components are replaced and the standard values ​​are recalibrated, a new evaluation cycle is established, and a succession coefficient is set. The initial actual life consumption of the new assessment cycle is the actual life consumption before maintenance multiplied by the inheritance coefficient λ. The inheritance coefficient is determined according to the maintenance type, with a higher value when only lubrication maintenance is performed, and a lower value or zero when key components are replaced.

[0029] Maximum permissible value of the comprehensive condition deviation index The following method can be used for calibration: Obtain the comprehensive state deviation index of the last action of the same type of operating mechanism before the failure as a sample set, and take the minimum value in the sample set as the reference value of the maximum allowable value of the comprehensive state deviation index. The reason for using the minimum value as the threshold is that this value represents the minimum deviation degree exhibited by the same type of equipment before reaching the failure state. Using this as the judgment boundary for the end of service life can ensure that the evaluation strategy is conservative and avoid missing early failure signs due to setting the threshold too high. When there are insufficient historical failure samples of the same type of operating mechanism, the corresponding comprehensive state deviation index can be calculated in reverse based on the upper limit of the allowable deviation of parameters such as stroke, speed, and coil current specified in industry standards or factory test specifications as a temporary reference value of the maximum allowable value. After the failure samples are accumulated, it can be updated according to the above method.

[0030] In an optional embodiment, the output method of the warning signal in step S6 is as follows: obtain historical operating data of the same type of operating mechanism, take the cumulative number of actions of the failed equipment as the failure life sample, take the cumulative number of actions of the unfailed equipment as the right censored sample, and use the maximum likelihood method to fit the Weibull distribution to obtain the cumulative number of actions corresponding to the median life. The median remaining number of actions is obtained by subtracting the current number of actions from the cumulative number of actions corresponding to the median lifetime. If the median remaining number of actions is negative, it is treated as zero. Eighty percent of the median remaining number of actions is used as the first warning threshold, and forty percent of the median remaining number of actions is used as the second warning threshold. When historical data samples are insufficient, the initial first warning threshold is the number of times the designed mechanical life is multiplied by the first preset experience ratio, and the initial second warning threshold is the number of times the designed mechanical life is multiplied by the second preset experience ratio. The first preset experience ratio is greater than the second preset experience ratio. After the data is accumulated, the warning threshold is updated according to the above method. The predicted number of remaining actionable actions is compared with the first warning threshold and the second warning threshold. If the predicted value is greater than the first warning threshold, no warning signal is issued; if the predicted value is less than or equal to the first warning threshold but greater than the second warning threshold, an attention warning signal is issued; if the predicted value is less than or equal to the second warning threshold, a danger warning signal is issued.

[0031] This embodiment takes a certain type of ring main unit switch operating mechanism as the object and provides a complete calculation example under a set of exemplary values, wherein each formula is consistent with the corresponding formula in the claims.

[0032] First, set the design mechanical life cycles of the operating mechanism Nd = 10000, the energy storage state qualification threshold PF = 0.05, and the maximum allowable value. =1.0, preset acceleration coefficient β=1.0, preset compensation coefficient α=1.0, stroke deviation rate weight is 0.6, speed deviation rate weight is 0.4, standard stroke value is 100.0 mm, standard average speed is 1.5 m / s, standard electromagnet core contact time is 15.0 ms, and standard starting current multiple is 5.0.

[0033] Then, the following measurements were taken during a certain tripping operation using the data acquisition unit: the actual value of the moving contact stroke was 100.5 mm, the actual value of the average speed of the moving contact was 1.45 m / s, the actual value of the electromagnet core contact time was 15.5 ms, and the actual value of the starting current multiple was 5.3.

[0034] Then, by substituting the values, the travel deviation rate equals... ; Speed ​​deviation rate equals ; Stroke speed deviation index equals ; Electromagnetic core condition deviation index equals ; Energy storage state deviation index equals ; Mechanical condition deviation index ; Energy storage correction term equal ; Comprehensive State Deviation Index ; Single lifespan consumption of the kth action equal If the actual total lifespan consumption before this action is 0.0001, then the actual total lifespan consumption after this action is... ; Predicted number of remaining actions .

[0035] If the overall state deviation index of a certain action exceeds the maximum allowable value of 1.0, the lifespan is determined to be terminated, and the predicted number of remaining actions is zero. The above is only a feasible embodiment of the present invention and is not intended to limit the present invention.

[0036] Example 2: Based on the same inventive concept as Embodiment 1, such as Figure 3 As shown, this embodiment provides an online detection and remaining life assessment system for the operating mechanism of a ring main unit switch, including a data acquisition unit, a stroke speed characteristic analysis unit, an electromagnet core motion analysis unit, an energy storage status analysis unit, a comprehensive deviation calculation unit, a health assessment and life prediction unit, and an early warning output unit; The data acquisition unit is used to execute step S1, and to collect the moving contact displacement trajectory, the tripping coil current and the energy storage motor power supply current during each tripping action. In practical engineering applications, the data acquisition unit is equipped with abnormal waveform identification and rejection logic. When the output voltage of the displacement sensor exceeds the normal range and continues for a preset duration, it is determined to be a sensor disconnection fault. The data in this batch is marked as invalid and a sensor fault alarm is output. When a short-duration instantaneous spike pulse with an amplitude far exceeding the normal range appears in the waveform of the trip coil current or the power supply current of the energy storage motor, it is determined to be an instantaneous jitter caused by electromagnetic interference. Median filtering or amplitude limiting filtering methods are used to reject and smooth it. For instantaneous jumps in displacement signals caused by external vibration and other factors, a reasonable threshold for the displacement change of adjacent sampling points is set for identification. Sampling points that exceed the threshold are replaced by interpolation of the next and next adjacent points. The stroke speed characteristic analysis unit is used to execute step S2, extract the stroke and speed of the moving contact from the moving contact displacement trajectory, and calculate the stroke speed deviation index of this action; The electromagnet core action analysis unit is used to execute step S3, extract the electromagnet core contact time from the trip coil current, and calculate the electromagnet core state deviation index for this action. The energy storage status analysis unit is used to execute step S4, extract the starting current multiple from the energy storage motor power supply current, and calculate the energy storage status deviation index of the operation cycle to which this action belongs. The comprehensive deviation calculation unit is used to execute step S5, add the stroke speed deviation index and the electromagnet core state deviation index to obtain the mechanical state deviation index of this action, and then use the energy storage state deviation index to correct the mechanical state deviation index to obtain the comprehensive state deviation index of this action and record and store it. The health assessment and life prediction unit is used to execute step S6, which updates the total actual life consumption and calculates the predicted value of the remaining number of actions based on the comprehensive state deviation index of each action. When the total actual life consumption reaches the maximum consumption limit or the comprehensive state deviation index exceeds the maximum allowable value, the life is determined to end. The health status level is divided according to the comprehensive state deviation index, and the predicted value and level information are transmitted to the early warning output unit. In practical engineering applications, the health assessment and life prediction unit may also include fault tracing logic, which is used to locate possible faulty components based on the changes in various deviation indices.

[0037] When the comprehensive condition deviation index exceeds the standard and is mainly manifested by a significant increase in the stroke speed deviation index, while the electromagnet core condition deviation index and the energy storage condition deviation index are both within the normal range, the fault type is determined to be an abnormality in the mechanical transmission part. Possible causes include transmission link jamming, contact wear, or buffer failure.

[0038] When the comprehensive state deviation index exceeds the standard and is mainly manifested by a significant increase in the state deviation index of the electromagnet core, while the stroke speed deviation index and the energy storage state deviation index are within the normal range, the fault type is determined to be abnormal electromagnet core operation. Possible causes include electromagnet core jamming, short circuit aging between coil turns, or changes in the air gap of the core.

[0039] When the comprehensive condition deviation index exceeds the standard and is mainly manifested as a significant increase in the energy storage condition deviation index, while the stroke speed deviation index and the electromagnet core condition deviation index are both within the normal range, the fault type is determined to be an energy storage system abnormality. Possible causes include fatigue relaxation of the energy storage spring or lubrication failure of the energy storage motor bearing.

[0040] When the stroke speed deviation index, the electromagnet core condition deviation index, and the energy storage condition deviation index all increase to different degrees, the fault type is determined to be comprehensive mechanical aging of the operating mechanism, and a comprehensive overhaul or replacement is recommended. The early warning output unit is used to compare the received predicted value of the remaining number of actions with the preset first early warning threshold and second early warning threshold, and issue a corresponding early warning signal based on the comparison result.

[0041] It should be noted that this invention focuses on the opening action as the main monitoring object. This is because the opening action involves the energy storage spring releasing energy to drive the contact movement, and its stroke speed characteristics are more sensitive to the degradation of the mechanical state and energy storage state of the operating mechanism. In the closing application scenario, since the opening and closing action mechanisms are different, the standard values ​​of the moving contact stroke and speed in step S2 need to be replaced with the standard values ​​corresponding to the closing operation. For the energy storage state evaluation and correction logic in steps S4 and S5, those skilled in the art can independently establish an energy storage state deviation index calculation and correction model suitable for closing based on the power-on timing of the energy storage motor during the closing operation cycle. Its overall evaluation framework still falls within the protection scope of this invention.

[0042] The parameters and steps for implementing the corresponding functions of each unit module in the online detection and remaining life assessment system for the ring main unit switch operating mechanism of the present invention can be referred to the parameters and steps in the embodiments of the online detection and remaining life assessment method for the ring main unit switch operating mechanism described above, and will not be repeated here.

[0043] Taking the operating mechanism of the distribution network ring network box switch as an application scenario, the specific implementation is as follows: First, the data acquisition unit synchronously starts acquisition every time the tripping action is triggered to obtain the moving contact displacement trajectory, tripping coil current and energy storage motor power supply current, and transmits the three types of signals to the stroke speed characteristic analysis unit, the electromagnet core action analysis unit and the energy storage status analysis unit respectively.

[0044] Then, the stroke and speed of the moving contact are extracted from the displacement trajectory of the moving contact by the stroke speed characteristic analysis unit, the stroke deviation rate and speed deviation rate are calculated, and the stroke speed deviation index is obtained by weighted summation; the current start time and current peak time are extracted from the current of the trip coil by the electromagnet core action analysis unit, and the time between the two is used as the electromagnet core contact time to calculate the electromagnet core state deviation index; the steady-state value of the current and the current peak value are extracted from the power supply current of the energy storage motor by the energy storage state analysis unit, the measured start current multiple is calculated, and the energy storage state deviation index is obtained. The three deviation indices are output to the comprehensive deviation calculation unit respectively.

[0045] Next, the comprehensive deviation calculation unit adds the stroke speed deviation index and the electromagnet core state deviation index to obtain the mechanical state deviation index. When the energy storage state deviation index does not exceed the qualified threshold of energy storage state, the comprehensive state deviation index is equal to the mechanical state deviation index; when the energy storage state deviation index exceeds the threshold, the comprehensive state deviation index is equal to the mechanical state deviation index plus the relative proportion of the portion of the energy storage state deviation index that exceeds the threshold. The comprehensive deviation calculation unit records and stores the result.

[0046] Next, the health assessment and life prediction unit updates the actual total life consumption based on the comprehensive state deviation index of each action. The basic life consumption for a single action is the reciprocal of the designed mechanical lifespan. The basic consumption is amplified according to the ratio of the comprehensive state deviation index to the maximum allowable value to obtain the single life consumption. The actual total life consumption is the sum of the previous cumulative value and the current single life consumption, and does not exceed the maximum consumption limit. Based on this, the predicted value of the remaining number of actions is calculated. When the actual total life consumption reaches the maximum consumption limit, or the comprehensive state deviation index exceeds the maximum allowable value, the life is determined to end, and the predicted value of the remaining number of actions is zero. The health assessment and life prediction unit also classifies the health status level and transmits the predicted value and level information to the early warning output unit.

[0047] Finally, the predicted number of remaining actionable times is compared with the first and second warning thresholds by the warning output unit. The first and second warning thresholds are obtained by fitting a Weibull distribution based on historical operating data of similar operating mechanisms. When the predicted value is greater than the first warning threshold, no warning signal is issued. When the predicted value is less than or equal to the first warning threshold but greater than the second warning threshold, an attention state warning signal is issued. When the predicted value is less than or equal to the second warning threshold, a danger state warning signal is issued.

[0048] Example 3: Based on the same inventive concept as Embodiment 1, this embodiment provides an electronic device, including: a processor and a memory, wherein the memory stores a computer program that can be called by the processor; The processor executes the above-described method for online detection and remaining life assessment of the ring main unit switch operating mechanism by calling the computer program stored in the memory.

[0049] It should be noted that all computer programs for the online detection and remaining life assessment method of the ring main unit switch operating mechanism can be implemented using C language or other programming languages.

[0050] Example 4: Based on the same inventive concept as in Embodiment 1, this embodiment proposes a computer-readable storage medium having an erasable and rewritable computer program stored thereon. When the computer program runs on the computer device, it causes the computer device to perform the above-mentioned online detection and remaining life assessment method for the ring main unit switch operating mechanism.

[0051] For example, computer-readable storage media can be read-only memory, random access memory, read-only optical disc, magnetic tape, floppy disk, and optical data storage devices.

[0052] The various embodiments in this invention are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments. In particular, for the device and medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple. For the relevant parts, please refer to the description of the method embodiments.

[0053] The systems, media, and methods provided in the embodiments of the present invention are in one-to-one correspondence. Therefore, the systems and media also have similar beneficial technical effects as their corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the systems and media will not be repeated here.

[0054] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0055] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, as well as combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0056] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0057] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0058] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0059] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0060] Computer-readable media include both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0061] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. The above are merely embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for online detection and remaining life assessment of the operating mechanism of a ring main unit switch, characterized in that, Includes the following steps: S1. Collect the moving contact displacement trajectory, tripping coil current and energy storage motor power supply current during each tripping action; S2. Extract the moving contact stroke and moving contact speed from the moving contact displacement trajectory, and calculate the stroke speed deviation index for this action; S3. Extract the electromagnet core contact time from the trip coil current and calculate the electromagnet core state deviation index for this action. S4. Extract the starting current multiple from the energy storage motor power supply current and calculate the energy storage state deviation index of the operation cycle to which this action belongs. S5. Add the stroke speed deviation index to the electromagnet core state deviation index to obtain the mechanical state deviation index of this action. Then, use the energy storage state deviation index to correct the mechanical state deviation index to obtain the comprehensive state deviation index of this action and record and store it. S6. Update the total actual lifespan consumption according to the comprehensive state deviation index of each action. The total actual lifespan consumption is monotonically reduced with the number of actions. Calculate the predicted number of remaining actions based on this. When the total actual lifespan consumption reaches the maximum consumption limit or the comprehensive state deviation index exceeds the maximum allowable value, lifespan is determined to end. The health status level is classified according to the comprehensive state deviation index and an early warning signal is output.

2. The method for online detection and remaining life assessment of the operating mechanism of a ring main unit switch according to claim 1, characterized in that: Step S2 specifically includes the following steps: S21. Extract the measured value of the moving contact stroke from the moving contact displacement trajectory, and calculate the ratio of the absolute value of the deviation between the measured stroke value and the standard value to the standard value, which is used as the stroke deviation rate. S22. Extract the measured average velocity of the moving contact from the displacement trajectory of the moving contact, and calculate the ratio of the absolute value of the deviation between the measured velocity value and the standard value to the standard value, which is used as the velocity deviation rate. S23. The stroke deviation rate and speed deviation rate are weighted and summed to obtain the stroke and speed deviation index of this action.

3. The method for online detection and remaining life assessment of the operating mechanism of a ring main unit switch according to claim 1, characterized in that: Step S3 specifically includes the following steps: S31. Extract the current start time and current peak time from the current waveform of the trip coil, and use the time between the current start time and the current peak time as the electromagnet core contact time. S32. Calculate the ratio of the absolute value of the deviation between the measured value and the standard value of the electromagnet core's contact time to the standard value, and use it as the electromagnet core's state deviation index.

4. The method for online detection and remaining life assessment of the operating mechanism of a ring main unit switch according to claim 1, characterized in that: Step S4 specifically includes the following steps: S41. Extract the steady-state value and peak value of the current from the power supply current of the energy storage motor, and calculate the ratio of the peak value of the current to the steady-state value of the current as the measured starting current multiple. S42. Calculate the ratio of the absolute value of the deviation between the measured starting current multiple and the standard starting current multiple to the standard starting current multiple, and use it as the energy storage state deviation index.

5. The method for online detection and remaining life assessment of the operating mechanism of a ring main unit switch according to claim 4, characterized in that: Step S5 specifically includes the following steps: S51. Add the stroke speed deviation index and the electromagnet core state deviation index to obtain the mechanical state deviation index of this action. S52. Set a threshold for acceptable energy storage status. When the energy storage status deviation index is less than or equal to this threshold, the energy storage status is determined to be normal, and the overall status deviation index of this action is equal to the mechanical status deviation index. When the energy storage status deviation index is greater than this threshold, the energy storage status is determined to be abnormal, and the overall status deviation index of this action is... The calculation formula is: ； in, This is the mechanical condition deviation index. PF is the energy storage state deviation index, PF is the energy storage state qualification threshold and its value is greater than zero, and α is the preset compensation coefficient and α is greater than zero. S53. Record and store the calculated comprehensive state deviation index.

6. The method for online detection and remaining life assessment of the operating mechanism of a ring main unit switch according to claim 5, characterized in that: Step S6 specifically includes the following steps: S61. Set the design mechanical life cycles Nd of the operating mechanism, then the basic life consumption per single action is: ; S62. Set the maximum permissible value of the comprehensive state deviation index. And the preset acceleration coefficient β, the single lifespan consumption for the k-th action. The calculation is performed using the following formula: ; in, Let be the comprehensive state deviation index of the k-th action record, and ; S63, Total actual service life consumption of the operating mechanism The update formula is: ； in, This represents the total actual lifespan consumption accumulated after the (k-1)th action, which is the total lifespan consumption accumulated by all previous actions before the start of the kth action. This indicates that no consumption occurred when the system was put into operation; S64, Based on actual total lifespan consumption The calculation results are used to calculate the predicted value of the remaining number of actions. The calculation formula is: ; Wherein, Nd represents the design mechanical life cycles of the operating mechanism; S65. Perform threshold comparison: when the actual total lifespan consumption... Greater than or equal to 1, or when the comprehensive state deviation index of any action is greater than or equal to the maximum permissible value of the comprehensive state deviation index. When the operating mechanism has reached the end of its service life, the predicted number of remaining operable operations is zero. S66. Based on the magnitude of the comprehensive condition deviation index, the health status of the operating mechanism is divided into three levels: healthy, alert, and abnormal. When the comprehensive condition deviation index is less than a preset multiple of the energy storage condition qualification threshold, it is considered healthy; when it is greater than or equal to the preset multiple but less than the maximum allowable value, it is considered alert; when it is greater than or equal to the maximum allowable value, it is considered abnormal. When the comprehensive condition deviation index continues to increase, it is determined that the operating mechanism has a progressive degradation fault mode; when the comprehensive condition deviation index suddenly jumps, it is determined that a sudden fault mode exists. It should be noted that: when the energy storage motor power supply current is missing or invalid after being eliminated by abnormal waveforms, the comprehensive state deviation index of this action is equal to the mechanical state deviation index; when the trip coil current is missing or invalid after being eliminated by abnormal waveforms, the electromagnet core state deviation index is not included in the calculation of the mechanical state deviation index; when the moving contact displacement trajectory is missing or invalid after being eliminated by abnormal waveforms, this action is not included in the update of the actual total life consumption, and a sensor fault alarm is output. After the operating mechanism is repaired or key components are replaced and the standard values ​​are recalibrated, a new evaluation cycle is established, and a succession coefficient is set. The initial actual life consumption of the new assessment cycle is the actual life consumption before maintenance multiplied by the inheritance coefficient λ. The inheritance coefficient is determined according to the maintenance type, with a higher value when only lubrication maintenance is performed, and a lower value or zero when key components are replaced.

7. The method for online detection and remaining life assessment of the operating mechanism of a ring main unit switch according to claim 6, characterized in that: The output method of the warning signal in step S6 is as follows: obtain the historical operating data of the same type of operating mechanism, take the cumulative number of actions of the failed equipment as the failure life sample, take the cumulative number of actions of the unfailed equipment as the right censored sample, and use the maximum likelihood method to fit the Weibull distribution to obtain the cumulative number of actions corresponding to the median life. The median remaining number of actions is obtained by subtracting the current number of actions from the cumulative number of actions corresponding to the median lifetime. If the median remaining number of actions is negative, it is treated as zero. Eighty percent of the median remaining number of actions is used as the first warning threshold, and forty percent of the median remaining number of actions is used as the second warning threshold. When historical data samples are insufficient, the initial first warning threshold is the number of times the designed mechanical life is multiplied by the first preset experience ratio, and the initial second warning threshold is the number of times the designed mechanical life is multiplied by the second preset experience ratio. The first preset experience ratio is greater than the second preset experience ratio. After the data is accumulated, the warning threshold is updated according to the above method. The predicted number of remaining actionable actions is compared with the first and second warning thresholds. If the predicted value is greater than the first warning threshold, no warning signal is issued. When the predicted value is less than or equal to the first warning threshold and greater than the second warning threshold, an attention status warning signal is issued. A danger warning signal is issued when the predicted value is less than or equal to the second warning threshold.

8. A system for online detection and remaining life assessment of the operating mechanism of a ring main unit switch, which is implemented based on the method for online detection and remaining life assessment of the operating mechanism of a ring main unit switch as described in any one of claims 1-7, characterized in that, It includes a data acquisition unit, a stroke speed characteristic analysis unit, an electromagnet core motion analysis unit, an energy storage status analysis unit, a comprehensive deviation calculation unit, a health assessment and life prediction unit, and an early warning output unit; The data acquisition unit is used to execute step S1, and to acquire the moving contact displacement trajectory, the tripping coil current and the energy storage motor power supply current during each tripping action. The stroke speed characteristic analysis unit is used to execute step S2, extract the stroke and speed of the moving contact from the moving contact displacement trajectory, and calculate the stroke speed deviation index of this action; The electromagnet core action analysis unit is used to execute step S3, extract the electromagnet core contact time from the trip coil current, and calculate the electromagnet core state deviation index for this action. The energy storage state analysis unit is used to execute step S4, extract the starting current multiple from the energy storage motor power supply current, and calculate the energy storage state deviation index of the operation cycle to which this action belongs. The comprehensive deviation calculation unit is used to execute step S5, add the stroke speed deviation index and the electromagnet core state deviation index to obtain the mechanical state deviation index of this action, and then use the energy storage state deviation index to correct the mechanical state deviation index to obtain the comprehensive state deviation index of this action and record and store it. The health assessment and life prediction unit is used to execute step S6, which updates the total actual life consumption and calculates the predicted value of the remaining number of actions based on the comprehensive state deviation index of each action. When the total actual life consumption reaches the maximum consumption limit or the comprehensive state deviation index exceeds the maximum allowable value, the life is determined to end. The health status level is divided according to the comprehensive state deviation index, and the predicted value and level information are transmitted to the early warning output unit. The early warning output unit is used to compare the received predicted value of the remaining number of actions with a preset first early warning threshold and a second early warning threshold, and issue a corresponding early warning signal based on the comparison result.

9. An electronic device, comprising: A processor and a memory, wherein the memory stores a computer program that can be called by the processor, characterized in that: the processor executes the online detection and remaining life assessment method for the ring main unit switch operating mechanism as described in any one of claims 1-7 by calling the computer program stored in the memory.

10. A computer-readable storage medium, characterized in that: The device stores instructions that, when executed on a computer, cause the computer to perform the online detection and remaining life assessment method for the ring main unit switch operating mechanism as described in any one of claims 1-7.

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