Circuit breaker service life evaluation system based on loss analysis

Abstract

The invention relates to the technical field of circuit breaker service life evaluation, and particularly discloses a circuit breaker service life evaluation system based on loss analysis. Comprising a circuit breaker operation time division module, a circuit breaker operation data acquisition module, a circuit breaker loss analysis module, a circuit breaker loss monitoring module, a circuit breaker performance analysis module, a circuit breaker service life evaluation module, a circuit breaker service life evaluation correction module and a circuit breaker service life early warning module. According to the method, the running loss and performance data of each monitoring sub-region are collected, the loss change coefficient and the performance evaluation coefficient are obtained through analysis, the service life evaluation index is further obtained comprehensively, and correction is performed by using the correction factor; the loss monitoring module can compare loss change coefficients in real time, screen abnormal data and control the abnormal data; according to the invention, accurate evaluation, real-time regulation and early warning of the service life of the circuit breaker are realized, the operation and maintenance cost is reduced, the operation reliability and economical efficiency of a power system are improved, and powerful support is provided for intelligent management of the power system.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker life assessment, and in particular to a circuit breaker life assessment system based on loss analysis. Background Art

[0002] As an essential and critical component of power systems, circuit breakers fulfill the dual responsibilities of controlling and protecting circuits. Under normal operating conditions, circuit breakers can flexibly connect and disconnect circuits to meet the varying operating modes and load requirements of the power system. However, when faults such as short circuits and overloads occur, circuit breakers must quickly and reliably interrupt the fault current to prevent further expansion and ensure the safe and stable operation of the power system. Therefore, accurately assessing the remaining life of circuit breakers and promptly identifying and addressing potential faults are crucial for the stable operation and efficient management of power systems.

[0003] Limitations of traditional circuit breaker life assessment systems: First, they often lack a detailed breakdown of the breaker's operating time. Most rely on a simple periodic assessment approach, failing to account for variations in the breaker's operating conditions over time. Second, traditional systems lack real-time and accurate monitoring of circuit breaker wear. They often only detect significant wear issues during regular maintenance, failing to detect dynamic changes in wear. Furthermore, when wear anomalies are detected, they lack effective control and resolution mechanisms, hindering timely action to mitigate the impact of wear on the breaker's lifespan. Furthermore, traditional life assessment methods often rely on empirical formulas or simple statistical models, failing to fully account for the complex factors and dynamic changes in actual circuit breaker operation, resulting in low accuracy in assessment results. Furthermore, traditional systems lack a mechanism for revising life assessment results. Once the assessment model is established, it is difficult to adjust and optimize it based on actual conditions. This can lead to significant deviations between the assessment results and the actual lifespan of the circuit breaker, making it difficult to provide a reliable basis for equipment maintenance and replacement. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a circuit breaker life assessment system based on loss analysis to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a circuit breaker life assessment system based on loss analysis, comprising a circuit breaker operation time division module, a circuit breaker operation data acquisition module, a circuit breaker loss analysis module, a circuit breaker loss monitoring module, a circuit breaker performance analysis module, a circuit breaker life assessment module, a circuit breaker life assessment correction module, and a circuit breaker life early warning module; Circuit breaker operation time division module: used to divide the target circuit breaker operation time into monitoring sub-areas according to the equal time division method, and number them as 1, 2, ...i, ...n in sequence; Circuit breaker operation data acquisition module: used to collect the operation data of each monitoring sub-area of ​​the target circuit breaker, the operation data including circuit breaker operation loss data and circuit breaker performance data; Circuit breaker loss analysis module: performs loss analysis on the target circuit breaker based on the circuit breaker operation loss data, and obtains the circuit breaker loss variation coefficient of each monitoring sub-area; Circuit breaker loss monitoring module: used to obtain the circuit breaker loss variation coefficient of each monitoring sub-area, compare and analyze it with the preset circuit breaker loss variation coefficient, filter out abnormal circuit breaker loss data, and control the abnormal circuit breaker loss data through the circuit breaker loss abnormality control coefficient; Circuit breaker performance analysis module: performs performance analysis on the target circuit breaker based on circuit breaker performance data to obtain the circuit breaker performance evaluation coefficient of each monitoring sub-area; Circuit breaker life assessment module: Based on the circuit breaker loss variation coefficient and circuit breaker performance assessment coefficient of each monitoring sub-area, the circuit breaker life assessment index of each monitoring sub-area is analyzed; Circuit breaker life assessment correction module: used to obtain the circuit breaker life assessment index of each monitoring sub-area and correct the circuit breaker life assessment index through the circuit breaker life assessment correction factor; Circuit breaker life warning module: Based on the corrected circuit breaker life assessment index of each monitoring sub-area, it performs circuit breaker life assessment analysis and issues warning information for data with abnormal assessment results.

[0006] Preferably, the specific implementation of the circuit breaker operation time division module is as follows: The target circuit breaker operation time is determined as the target monitoring object, and the target circuit breaker operation time is divided into monitoring sub-areas according to an equal time division method, and the monitoring sub-areas are sequentially numbered as 1, 2, ...i, ...n, where i is the number of each monitoring sub-area.

[0007] Preferably, the circuit breaker operation data acquisition module is specifically implemented as follows: The circuit breaker operation data acquisition module includes a circuit breaker operation loss data acquisition unit and a circuit breaker performance data acquisition unit; The circuit breaker operation loss data acquisition unit is used to collect the circuit breaker operation loss data of each monitoring sub-area. The circuit breaker operation loss data includes the circuit breaker contact electrical wear, circuit breaker contact temperature, and load fluctuation frequency, which are marked as Ae and i 、Tc i , Lf i, i is the number of each monitoring sub-area, i=1, 2,...n; The circuit breaker performance data acquisition unit is used to collect circuit breaker performance data of each monitoring sub-area. The circuit breaker performance data includes circuit breaker contact pressure, opening speed drop gradient, and closing bounce time, which are marked as Cp i 、Dg i , Bt i .

[0008] Preferably, the method for obtaining the electrical wear of the circuit breaker contacts is as follows: obtaining the breaking current value and arcing time of each monitoring sub-area, and substituting them into the formula , among which Ae i represents the electrical wear of the circuit breaker contacts in the i-th monitoring sub-area, represents the jth breaking current value of the i-th monitoring sub-area, represents the jth arcing time of the i-th monitoring sub-area, j represents the number of each interruption, j=1, 2, ...m, and m represents the total number of circuit breaker interruptions.

[0009] Preferably, the circuit breaker loss analysis module is specifically implemented as follows: Establish a data extraction relationship between the circuit breaker loss analysis module and the management database to extract the preset maximum allowable value Ae of the target circuit breaker contact electrical wear. max , the preset maximum allowable temperature of the circuit breaker contact Tc max ; Calculate the circuit breaker loss variation coefficient of each monitoring sub-area. The calculation model is as follows: ,in, Ae represents the circuit breaker loss variation coefficient of the i-th monitoring sub-area, i Tc represents the electrical wear of the circuit breaker contacts in the i-th monitoring sub-area, i represents the circuit breaker contact temperature of the i-th monitoring sub-area, Lf i represents the load fluctuation frequency of the i-th monitoring sub-area, represents a positive number greater than zero, Represents the exponential function.

[0010] Preferably, the circuit breaker loss monitoring module is specifically implemented as follows: Obtain the circuit breaker loss variation coefficient of each monitoring sub-area and compare it with the preset circuit breaker loss variation coefficient Comparative analysis: if the circuit breaker loss variation coefficient of a monitoring sub-area is less than the preset circuit breaker loss variation coefficient, the circuit breaker loss status of the monitoring sub-area is judged to be normal; if the circuit breaker loss variation coefficient of a monitoring sub-area is greater than or equal to the preset circuit breaker loss variation coefficient, the circuit breaker loss status of the monitoring sub-area is judged to be abnormal, and the circuit breaker loss data of the monitoring sub-area is marked as abnormal circuit breaker loss data; The abnormal circuit breaker loss data is screened out and controlled by the abnormal circuit breaker loss control coefficient. The calculation model of the abnormal circuit breaker loss control coefficient is specifically as follows: ,in, represents the circuit breaker loss abnormality control coefficient of the i-th monitoring sub-area, represents a positive proportionality coefficient, represents the circuit breaker loss variation coefficient of the i-th monitoring sub-area, It represents the preset circuit breaker loss variation coefficient, and e represents the natural constant.

[0011] Preferably, the circuit breaker performance analysis module is specifically implemented as follows: Read the circuit breaker contact pressure of each monitoring sub-area and substitute it into the formula , get the circuit breaker contact pressure deviation Cpd of the i-th monitoring sub-area i , where Cp i represents the circuit breaker contact pressure of the i-th monitoring sub-area, Indicates the preset standard circuit breaker contact pressure; Calculate the circuit breaker performance evaluation coefficient of each monitoring sub-area. The calculation model is as follows: , among which, PEC i Cpd represents the circuit breaker performance evaluation coefficient of the i-th monitoring sub-area max Indicates the maximum allowable value of the circuit breaker contact voltage deviation preset, Dg i Indicates the decreasing gradient of the tripping speed in the ith monitoring sub-area, Bt i represents the closing bounce duration of the i-th monitoring sub-area, and e represents a natural constant.

[0012] Preferably, the circuit breaker life assessment module is specifically implemented as follows: Calculate the circuit breaker life assessment index of each monitoring sub-area. The calculation model is as follows: ,in, represents the circuit breaker life evaluation index of the i-th monitoring sub-area, PEC i represents the circuit breaker performance evaluation coefficient of the i-th monitoring sub-area, represents the circuit breaker loss variation coefficient of the i-th monitoring sub-area, Represents a positive number greater than zero.

[0013] Preferably, the circuit breaker life assessment and correction module is specifically implemented as follows: Obtain the circuit breaker life assessment index for each monitoring sub-area , the circuit breaker life assessment index is corrected by the circuit breaker life assessment correction factor. The corrected circuit breaker life assessment index formula is: ,in, represents the circuit breaker life evaluation index of the i-th monitoring sub-area after correction, represents the circuit breaker life assessment correction factor of the i-th monitoring sub-area; The calculation model of the circuit breaker life assessment correction factor in the i-th monitoring sub-area is specifically as follows: , where k represents the total number of historical evaluations, P represents the number of historical evaluations, p = 1, 2, ... k, 、 They represent the true value and the assessed value of the p-th historical assessment corresponding to the i-th monitoring sub-area.

[0014] Preferably, the circuit breaker life warning module is specifically implemented as follows: The circuit breaker life assessment index of each monitoring sub-area after correction is read and compared with the preset circuit breaker life assessment index threshold. If the circuit breaker life assessment index of a certain monitoring sub-area after correction is greater than the preset circuit breaker life assessment index threshold, it is judged that the circuit breaker life of the monitoring sub-area after correction is in a healthy state. If the circuit breaker life assessment index of a certain monitoring sub-area after correction is less than or equal to the preset circuit breaker life assessment index threshold, it is judged that the circuit breaker life of the monitoring sub-area after correction is in an unhealthy state. The data indicating that the circuit breaker life is in an unhealthy state is recorded as the circuit breaker life assessment result, and an alarm is issued for the abnormal assessment result.

[0015] Technical effects and advantages of the present invention: 1. The present invention divides the circuit breaker's operating time into monitoring sub-areas, collects operating loss and performance data from each area, and analyzes the loss data and performance data separately to obtain the loss variation coefficient and performance evaluation coefficient. This in turn comprehensively derives the life assessment index, which is then corrected using a correction factor. Simultaneously, the loss monitoring module compares the loss variation coefficient in real time, filters abnormal data, and implements control. The life warning module issues abnormality warnings in advance based on the corrected index. This enables accurate assessment, real-time control, and early warning of circuit breaker life, effectively reducing operation and maintenance costs and improving the reliability and economic efficiency of power system operation. 2. The circuit breaker loss monitoring module of the present invention can obtain the circuit breaker loss variation coefficient of each monitoring sub-area in real time, and compare and analyze it with the preset value, so as to promptly discover abnormal loss data, and control the abnormal data through the circuit breaker loss abnormality control coefficient, so as to take corresponding measures in the early stage of abnormal loss to avoid further expansion of loss; at the same time, the circuit breaker life assessment correction module corrects the life assessment index through the circuit breaker life assessment correction factor, and can dynamically adjust the assessment result according to the actual operating conditions of the circuit breaker; this real-time monitoring and dynamic control mechanism enables the system to respond to changes in the operating status of the circuit breaker in a timely manner, effectively extend the service life of the circuit breaker, reduce the probability of failure, and ensure the safe and stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described with reference to the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without inventive effort.

[0017] Figure 1 The figure is a schematic structural diagram of a circuit breaker life assessment system based on loss analysis according to the present invention.

[0018] Figure 2 This is a structural diagram of the acquisition unit of the circuit breaker operation data acquisition module of the present invention. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1 As shown, the present invention provides a circuit breaker life assessment system based on loss analysis, comprising: a circuit breaker operation time division module, a circuit breaker operation data acquisition module, a circuit breaker loss analysis module, a circuit breaker loss monitoring module, a circuit breaker performance analysis module, a circuit breaker life assessment module, a circuit breaker life assessment correction module, and a circuit breaker life early warning module; Circuit breaker operation time division module: used to divide the target circuit breaker operation time into monitoring sub-areas according to the equal time division method, and number them as 1, 2, ...i, ...n in sequence; In this embodiment, it should be specifically explained that the specific execution method of the circuit breaker operation time division module is as follows: The target circuit breaker operation time is determined as the target monitoring object, and the target circuit breaker operation time is divided into monitoring sub-areas according to an equal time division method, and the monitoring sub-areas are sequentially numbered as 1, 2, ...i, ...n, where i is the number of each monitoring sub-area.

[0021] Circuit breaker operation data acquisition module: used to collect the operation data of each monitoring sub-area of ​​the target circuit breaker, the operation data including circuit breaker operation loss data and circuit breaker performance data; In this embodiment, it should be specifically explained that the specific execution method of the circuit breaker operation data acquisition module is as follows: See also Figure 2 As shown, the circuit breaker operation data acquisition module includes a circuit breaker operation loss data acquisition unit and a circuit breaker performance data acquisition unit; It should be noted that the circuit breaker operation loss data acquisition unit is used to collect the circuit breaker operation loss data of each monitoring sub-area. The circuit breaker operation loss data includes the circuit breaker contact electrical wear, circuit breaker contact temperature, and load fluctuation frequency, which are marked as Ae and Ae, respectively. i 、Tc i , Lf i , i is the number of each monitoring sub-area, i=1, 2,...n; The circuit breaker performance data acquisition unit is used to collect circuit breaker performance data of each monitoring sub-area. The circuit breaker performance data includes circuit breaker contact pressure, opening speed drop gradient, and closing bounce time, which are marked as Cp i 、Dg i , Bt i ; In this embodiment, it should be specifically explained that the method for obtaining the electrical wear of the circuit breaker contacts is as follows: obtaining the breaking current value and arcing time of each monitoring sub-area, and substituting them into the formula , among which Ae i represents the electrical wear of the circuit breaker contacts in the i-th monitoring sub-area, represents the jth breaking current value of the i-th monitoring sub-area, represents the jth arcing time of the i-th monitoring sub-area, j represents the number of each interruption, j=1, 2, ...m, and m represents the total number of circuit breaker interruptions.

[0022] Circuit breaker loss analysis module: performs loss analysis on the target circuit breaker based on the circuit breaker operation loss data, and obtains the circuit breaker loss variation coefficient of each monitoring sub-area; In this embodiment, it should be specifically explained that the specific execution method of the circuit breaker loss analysis module is as follows: Establish a data extraction relationship between the circuit breaker loss analysis module and the management database to extract the preset maximum allowable value Ae of the target circuit breaker contact electrical wear. max , the preset maximum allowable temperature of the circuit breaker contact Tc max ; Calculate the circuit breaker loss variation coefficient of each monitoring sub-area. The calculation model is as follows: ,in, Ae represents the circuit breaker loss variation coefficient of the i-th monitoring sub-area, i Tc represents the electrical wear of the circuit breaker contacts in the i-th monitoring sub-area, i represents the circuit breaker contact temperature of the i-th monitoring sub-area, Lf i represents the load fluctuation frequency of the i-th monitoring sub-area, represents a positive number greater than zero, Represents the exponential function.

[0023] Circuit breaker loss monitoring module: used to obtain the circuit breaker loss variation coefficient of each monitoring sub-area, compare and analyze it with the preset circuit breaker loss variation coefficient, filter out abnormal circuit breaker loss data, and control the abnormal circuit breaker loss data through the circuit breaker loss abnormality control coefficient; In this embodiment, it should be specifically explained that the specific implementation of the circuit breaker loss monitoring module is as follows: Obtain the circuit breaker loss variation coefficient of each monitoring sub-area and compare it with the preset circuit breaker loss variation coefficient Comparative analysis: if the circuit breaker loss variation coefficient of a monitoring sub-area is less than the preset circuit breaker loss variation coefficient, the circuit breaker loss status of the monitoring sub-area is judged to be normal; if the circuit breaker loss variation coefficient of a monitoring sub-area is greater than or equal to the preset circuit breaker loss variation coefficient, the circuit breaker loss status of the monitoring sub-area is judged to be abnormal, and the circuit breaker loss data of the monitoring sub-area is marked as abnormal circuit breaker loss data; The abnormal circuit breaker loss data is screened out and controlled by the abnormal circuit breaker loss control coefficient. The calculation model of the abnormal circuit breaker loss control coefficient is specifically as follows: ,in, represents the circuit breaker loss abnormality control coefficient of the i-th monitoring sub-area, represents a positive proportionality coefficient, represents the circuit breaker loss variation coefficient of the i-th monitoring sub-area, Indicates the preset circuit breaker loss variation coefficient.

[0024] In this embodiment, it should be specifically explained that: Indicates a positive proportional coefficient, used to control the circuit breaker loss abnormality control coefficient Coefficient of variation with circuit breaker loss Deviation from the preset circuit breaker loss variation coefficient rate of change of degree; The larger the value, the greater the circuit breaker loss variation coefficient. Compared with the preset circuit breaker loss variation coefficient When the deviation is large, the circuit breaker loss abnormal control coefficient The more dramatic the change, the stronger the control of abnormality. The appropriate value.

[0025] Circuit breaker performance analysis module: performs performance analysis on the target circuit breaker based on circuit breaker performance data to obtain the circuit breaker performance evaluation coefficient of each monitoring sub-area; In this embodiment, it should be specifically explained that the specific execution method of the circuit breaker performance analysis module is as follows: Read the circuit breaker contact pressure of each monitoring sub-area and substitute it into the formula , get the circuit breaker contact pressure deviation Cpd of the i-th monitoring sub-area i , where Cp i represents the circuit breaker contact pressure of the i-th monitoring sub-area, Indicates the preset standard circuit breaker contact pressure; Calculate the circuit breaker performance evaluation coefficient of each monitoring sub-area. The calculation model is as follows: , among which, PEC i Cpd represents the circuit breaker performance evaluation coefficient of the i-th monitoring sub-area max Indicates the maximum allowable value of the circuit breaker contact voltage deviation preset, Dg i Indicates the decreasing gradient of the tripping speed in the ith monitoring sub-area, Bt i represents the closing bounce duration of the i-th monitoring sub-area, and e represents a natural constant.

[0026] In this embodiment, it should be specifically explained that the closing bounce duration refers to the time difference between the first contact and the complete stable contact during the closing process of the contacts.

[0027] Circuit breaker life assessment module: Based on the circuit breaker loss variation coefficient and circuit breaker performance assessment coefficient of each monitoring sub-area, the circuit breaker life assessment index of each monitoring sub-area is analyzed; In this embodiment, it should be specifically explained that the specific execution method of the circuit breaker life assessment module is as follows: Calculate the circuit breaker life assessment index of each monitoring sub-area. The calculation model is as follows: ,in, represents the circuit breaker life evaluation index of the i-th monitoring sub-area, PEC i represents the circuit breaker performance evaluation coefficient of the i-th monitoring sub-area, represents the circuit breaker loss variation coefficient of the i-th monitoring sub-area, Represents a positive number greater than zero.

[0028] It should be noted that the circuit breaker performance evaluation coefficient PEC of each monitoring sub-area in the formula is i The larger the value, the greater the circuit breaker loss variation coefficient of each monitoring sub-area. The smaller the value, the better the circuit breaker life evaluation index of each monitoring sub-area. The bigger.

[0029] The circuit breaker performance evaluation coefficient PEC of each monitoring sub-area in the formula i , the circuit breaker loss variation coefficient of each monitoring sub-area There will be no mutual impact between them.

[0030] Circuit breaker life assessment correction module: used to obtain the circuit breaker life assessment index of each monitoring sub-area and correct the circuit breaker life assessment index through the circuit breaker life assessment correction factor; In this embodiment, it should be specifically explained that the specific execution method of the circuit breaker life assessment and correction module is as follows: Obtain the circuit breaker life assessment index for each monitoring sub-area , the circuit breaker life assessment index is corrected by the circuit breaker life assessment correction factor. The corrected circuit breaker life assessment index formula is: ,in, represents the circuit breaker life evaluation index of the i-th monitoring sub-area after correction, represents the circuit breaker life assessment correction factor of the i-th monitoring sub-area; The calculation model of the circuit breaker life assessment correction factor in the i-th monitoring sub-area is specifically as follows: , where k represents the total number of historical evaluations, P represents the number of historical evaluations, p = 1, 2, ... k, 、 They represent the true value and the assessed value of the p-th historical assessment corresponding to the i-th monitoring sub-area.

[0031] Circuit breaker life warning module: Based on the corrected circuit breaker life assessment index of each monitoring sub-area, it performs circuit breaker life assessment analysis and issues warning information for data with abnormal assessment results.

[0032] In this embodiment, it should be specifically explained that the specific execution method of the circuit breaker life warning module is as follows: The circuit breaker life assessment index of each monitoring sub-area after correction is read and compared with the preset circuit breaker life assessment index threshold. If the circuit breaker life assessment index of a certain monitoring sub-area after correction is greater than the preset circuit breaker life assessment index threshold, it is judged that the circuit breaker life of the monitoring sub-area after correction is in a healthy state. If the circuit breaker life assessment index of a certain monitoring sub-area after correction is less than or equal to the preset circuit breaker life assessment index threshold, it is judged that the circuit breaker life of the monitoring sub-area after correction is in an unhealthy state. The data indicating that the circuit breaker life is in an unhealthy state is recorded as the circuit breaker life assessment result, and an alarm is issued for the abnormal assessment result.

[0033] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0034] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A circuit breaker life assessment system based on loss analysis, characterized in that: include: Circuit breaker operation time division module: used to divide the target circuit breaker operation time into monitoring sub-areas according to the equal time division method, and number them as 1, 2, ...i, ...n in sequence; Circuit breaker operation data acquisition module: used to collect the operation data of each monitoring sub-area of ​​the target circuit breaker, the operation data including circuit breaker operation loss data and circuit breaker performance data; Circuit breaker loss analysis module: performs loss analysis on the target circuit breaker based on the circuit breaker operation loss data, and obtains the circuit breaker loss variation coefficient of each monitoring sub-area; Circuit breaker loss monitoring module: used to obtain the circuit breaker loss variation coefficient of each monitoring sub-area, compare and analyze it with the preset circuit breaker loss variation coefficient, filter out abnormal circuit breaker loss data, and control the abnormal circuit breaker loss data through the circuit breaker loss abnormality control coefficient; Circuit breaker performance analysis module: performs performance analysis on the target circuit breaker based on circuit breaker performance data to obtain the circuit breaker performance evaluation coefficient of each monitoring sub-area; Circuit breaker life assessment module: Based on the circuit breaker loss variation coefficient and circuit breaker performance assessment coefficient of each monitoring sub-area, the circuit breaker life assessment index of each monitoring sub-area is analyzed; Circuit breaker life assessment correction module: used to obtain the circuit breaker life assessment index of each monitoring sub-area and correct the circuit breaker life assessment index through the circuit breaker life assessment correction factor; Circuit breaker life warning module: Based on the corrected circuit breaker life assessment index of each monitoring sub-area, it performs circuit breaker life assessment analysis and issues warning information for data with abnormal assessment results.

2. The circuit breaker life assessment system based on loss analysis according to claim 1, characterized in that: The specific implementation of the circuit breaker operation time division module is as follows: The target circuit breaker operation time is determined as the target monitoring object, and the target circuit breaker operation time is divided into monitoring sub-areas according to an equal time division method, and the monitoring sub-areas are sequentially numbered as 1, 2, ...i, ...n, where i is the number of each monitoring sub-area.

3. The circuit breaker life assessment system based on loss analysis according to claim 1, characterized in that: The specific execution method of the circuit breaker operation data acquisition module is as follows: The circuit breaker operation data acquisition module includes a circuit breaker operation loss data acquisition unit and a circuit breaker performance data acquisition unit; The circuit breaker operation loss data acquisition unit is used to collect the circuit breaker operation loss data of each monitoring sub-area. The circuit breaker operation loss data includes the circuit breaker contact electrical wear, circuit breaker contact temperature, and load fluctuation frequency, which are marked as Ae and i 、Tc i , Lf i , i is the number of each monitoring sub-area, i=1, 2,...n; The circuit breaker performance data acquisition unit is used to collect circuit breaker performance data of each monitoring sub-area. The circuit breaker performance data includes circuit breaker contact pressure, opening speed drop gradient, and closing bounce time, which are marked as Cp i 、Dg i , Bt i .

4. The circuit breaker life assessment system based on loss analysis according to claim 3, characterized in that: The method for obtaining the electrical wear of the circuit breaker contacts is as follows: obtain the breaking current value and arcing time of each monitoring sub-area, and substitute them into the formula , among which Ae i represents the electrical wear of the circuit breaker contacts in the i-th monitoring sub-area, represents the jth breaking current value of the i-th monitoring sub-area, represents the jth arcing time of the i-th monitoring sub-area, j represents the number of each interruption, j=1, 2, ...m, and m represents the total number of circuit breaker interruptions.

5. The circuit breaker life assessment system based on loss analysis according to claim 1, characterized in that: The specific implementation of the circuit breaker loss analysis module is as follows: Establish a data extraction relationship between the circuit breaker loss analysis module and the management database to extract the preset maximum allowable value Ae of the target circuit breaker contact electrical wear. max , the preset maximum allowable temperature of the circuit breaker contact Tc max ; Calculate the circuit breaker loss variation coefficient of each monitoring sub-area. The calculation model is as follows: ,in, Ae represents the circuit breaker loss variation coefficient of the i-th monitoring sub-area, i Tc represents the electrical wear of the circuit breaker contacts in the i-th monitoring sub-area, i represents the circuit breaker contact temperature of the i-th monitoring sub-area, Lf i represents the load fluctuation frequency of the i-th monitoring sub-area, represents a positive number greater than zero, Represents the exponential function.

6. The circuit breaker life assessment system based on loss analysis according to claim 1, characterized in that: The specific implementation of the circuit breaker loss monitoring module is as follows: Obtain the circuit breaker loss variation coefficient of each monitoring sub-area and compare it with the preset circuit breaker loss variation coefficient Comparative analysis: if the circuit breaker loss variation coefficient of a monitoring sub-area is less than the preset circuit breaker loss variation coefficient, the circuit breaker loss status of the monitoring sub-area is judged to be normal; if the circuit breaker loss variation coefficient of a monitoring sub-area is greater than or equal to the preset circuit breaker loss variation coefficient, the circuit breaker loss status of the monitoring sub-area is judged to be abnormal, and the circuit breaker loss data of the monitoring sub-area is marked as abnormal circuit breaker loss data; Filter out abnormal circuit breaker loss data and control the abnormal circuit breaker loss data through the circuit breaker loss abnormality control coefficient. The calculation model of the circuit breaker loss abnormality control coefficient is specifically as follows: ,in, represents the circuit breaker loss abnormality control coefficient of the i-th monitoring sub-area, represents a positive proportionality coefficient, represents the circuit breaker loss variation coefficient of the i-th monitoring sub-area, It represents the preset circuit breaker loss variation coefficient, and e represents the natural constant.

7. The circuit breaker life assessment system based on loss analysis according to claim 1, characterized in that: The specific execution method of the circuit breaker performance analysis module is as follows: Read the circuit breaker contact pressure of each monitoring sub-area and substitute it into the formula , get the circuit breaker contact pressure deviation Cpd of the i-th monitoring sub-area i , where Cp i represents the circuit breaker contact pressure of the i-th monitoring sub-area, Indicates the preset standard circuit breaker contact pressure; Calculate the circuit breaker performance evaluation coefficient of each monitoring sub-area. The calculation model is as follows: , among which, PEC i Cpd represents the circuit breaker performance evaluation coefficient of the i-th monitoring sub-area max Indicates the maximum allowable value of the circuit breaker contact voltage deviation preset, Dg i Indicates the decreasing gradient of the tripping speed in the ith monitoring sub-area, Bt i represents the closing bounce duration of the i-th monitoring sub-area, and e represents a natural constant.

8. The circuit breaker life assessment system based on loss analysis according to claim 1, characterized in that: The specific implementation of the circuit breaker life assessment module is as follows: Calculate the circuit breaker life assessment index of each monitoring sub-area. The calculation model is as follows: ,in, represents the circuit breaker life evaluation index of the i-th monitoring sub-area, PEC i represents the circuit breaker performance evaluation coefficient of the i-th monitoring sub-area, represents the circuit breaker loss variation coefficient of the i-th monitoring sub-area, Represents a positive number greater than zero.

9. The circuit breaker life assessment system based on loss analysis according to claim 1, characterized in that: The specific implementation of the circuit breaker life assessment and correction module is as follows: Obtain the circuit breaker life assessment index for each monitoring sub-area , the circuit breaker life assessment index is corrected by the circuit breaker life assessment correction factor. The corrected circuit breaker life assessment index formula is: ,in, represents the circuit breaker life evaluation index of the i-th monitoring sub-area after correction, represents the circuit breaker life assessment correction factor of the i-th monitoring sub-area; The calculation model of the circuit breaker life assessment correction factor in the i-th monitoring sub-area is specifically as follows: , where k represents the total number of historical evaluations, P represents the number of historical evaluations, p = 1, 2, ... k, 、 They represent the true value and the assessed value of the p-th historical assessment corresponding to the i-th monitoring sub-area.

10. The circuit breaker life assessment system based on loss analysis according to claim 1, characterized in that: The specific implementation of the circuit breaker life warning module is as follows: The circuit breaker life assessment index of each monitoring sub-area after correction is read and compared with the preset circuit breaker life assessment index threshold. If the circuit breaker life assessment index of a certain monitoring sub-area after correction is greater than the preset circuit breaker life assessment index threshold, it is judged that the circuit breaker life of the monitoring sub-area after correction is in a healthy state. If the circuit breaker life assessment index of a certain monitoring sub-area after correction is less than or equal to the preset circuit breaker life assessment index threshold, it is judged that the circuit breaker life of the monitoring sub-area after correction is in an unhealthy state. The data indicating that the circuit breaker life is in an unhealthy state is recorded as the circuit breaker life assessment result, and an alarm is issued for the abnormal assessment result.

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