Circuit breaker porcelain bushing explosion characteristics analysis method, system and device

Abstract

The invention discloses a method, system and device for analyzing explosion characteristics of a circuit breaker porcelain bushing, and relates to the field of explosion characteristics analysis. The method for analyzing explosion characteristics of a circuit breaker porcelain bushing obtains scanning data, electrical performance data, and electrical parameter test data, temperature data, and material performance data of each circuit breaker porcelain bushing fragment after the explosion; performs three-dimensional modeling analysis based on the scanning data of each circuit breaker porcelain bushing fragment after the explosion to obtain crack data in the circuit breaker porcelain bushing; respectively reads crack data in the circuit breaker porcelain bushing, electrical performance data of each circuit breaker porcelain bushing fragment, and electrical parameter test data and temperature data of the circuit breaker porcelain bushing. The invention comprehensively considers crack data, electrical performance data, temperature data, and material performance data, and can comprehensively evaluate the situation of the circuit breaker porcelain bushing after the explosion, and provides comprehensive data support for further analysis.

Description

Technical Field

[0001] The invention relates to the field of explosion characteristic analysis, and in particular to a method, system and device for analyzing explosion characteristics of a porcelain bushing of a circuit breaker. Background Art

[0002] In the field of power equipment safety management, the analysis of the explosion characteristics of circuit breaker porcelain bushings is crucial. With the development of power systems, the reliability and safety requirements of power equipment are getting higher and higher. Traditional power systems face multiple challenges, one of which is the explosion problem of circuit breaker porcelain bushings.

[0003] First, the explosion of the circuit breaker porcelain bushing may cause power outages and equipment damage in the power system, which will have a serious impact on the stability and reliability of the power grid. Secondly, due to the complexity and uncertainty of the power system operating environment, the traditional analysis method of the circuit breaker porcelain bushing explosion is often difficult to meet the actual needs. For example, the traditional method may ignore the impact of the shape, size and material properties of the bushing fragments on the power equipment after the explosion. In addition, with the continuous expansion of the scale of power equipment and the changes in operating conditions, the problem of circuit breaker porcelain bushing explosion has become more complicated and severe. Power system managers are in urgent need of a comprehensive analysis method for the explosion characteristics of circuit breaker porcelain bushings to help them better understand the stress and deformation of the bushings during the explosion, so as to formulate effective prevention and emergency measures to ensure the safe and stable operation of the power system. In summary, in order to meet the challenges faced by the power system and improve the safety and reliability of power equipment, we need to develop an efficient and accurate analysis method for the explosion characteristics of circuit breaker porcelain bushings to meet the actual needs of power system management.

[0004] In the prior art, traditional explosion characteristic analysis methods usually lack comprehensiveness. They usually only analyze the explosion characteristics based on a single indicator or fixed rules, and cannot fully evaluate the situation of the circuit breaker porcelain bushing after the explosion, including cracks, changes in material properties and electrical properties, changes in electrical parameters, and temperature changes, resulting in an inability to fully evaluate the impact of the explosion. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a method, system and device for analyzing the explosion characteristics of a circuit breaker porcelain bushing, which solves the problem that traditional explosion characteristic analysis methods are usually lacking in comprehensiveness. They usually only analyze the explosion characteristics based on a single indicator or fixed rules, and are unable to fully evaluate the situation of the circuit breaker porcelain bushing after the explosion, including cracks, changes in material properties and electrical properties, changes in electrical parameters, and temperature changes, which leads to the problem that the impact of the explosion cannot be fully evaluated.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for analyzing explosion characteristics of a circuit breaker porcelain bushing, comprising the following steps: obtaining scanning data, electrical performance data, and electrical parameter test data, temperature data, and material performance data of each circuit breaker porcelain bushing fragment after the explosion; performing three-dimensional modeling analysis based on the scanning data of each circuit breaker porcelain bushing fragment after the explosion to obtain crack data in the circuit breaker porcelain bushing; respectively reading the crack data in the circuit breaker porcelain bushing, the electrical performance data of each circuit breaker porcelain bushing fragment, and the electrical parameter test data, temperature data, and material performance data of the circuit breaker porcelain bushing for analysis, and evaluating the degree of change of the material performance data of the circuit breaker porcelain bushing due to the crack data and the degree of change of the electrical performance data of each circuit breaker porcelain bushing fragment after the explosion and the electrical parameter test data and temperature data of the circuit breaker porcelain bushing according to the analysis results.

[0007] Furthermore, the scanning data of each circuit breaker porcelain bushing fragment after the explosion includes shape data and size data, the electrical performance data includes insulation resistance value, dielectric constant, and breakdown voltage value, the electrical parameter test data of the circuit breaker porcelain bushing includes normal electrical parameter test data and explosion electrical parameter test data, the normal electrical parameter test data specifically includes the electric field strength value in a set surrounding area when the circuit breaker porcelain bushing is working normally, the current value carried by the circuit breaker porcelain bushing when working normally, and the voltage value on the bushing surface when the circuit breaker porcelain bushing is working normally, the explosion electrical parameter test data specifically includes the electric field strength value in a set surrounding area when the circuit breaker porcelain bushing explodes, the current value carried by the circuit breaker porcelain bushing when exploding, and the voltage value on the bushing surface when the circuit breaker porcelain bushing explodes, and the temperature data includes normal temperature test data. The normal temperature data and explosion temperature data are specifically the normal temperature value of each pre-divided surface area of ​​the circuit breaker porcelain bushing when it is working normally, which is obtained in real time, and the normal temperature value of each pre-divided internal area of ​​the circuit breaker porcelain bushing when it is working normally, which is measured in real time. The explosion temperature data are specifically the explosion temperature value of each pre-divided surface area of ​​the circuit breaker porcelain bushing when it explodes, which is obtained in real time, and the explosion temperature value of each pre-divided internal area of ​​the circuit breaker porcelain bushing when it explodes, which is measured in real time. The crack data are specifically the crack position coordinate data, crack shape data, and crack size data of each crack in the complete circuit breaker porcelain bushing spliced ​​from the circuit breaker porcelain bushing fragments. The material performance data of the circuit breaker porcelain bushing include the density value, elastic modulus value, and thermal expansion coefficient of the circuit breaker porcelain bushing.

[0008] Furthermore, a 3D modeling analysis is performed based on the scanned data of each circuit breaker porcelain casing fragment after the explosion to obtain the crack data in the circuit breaker porcelain casing. Specifically, the shape data and size data of each circuit breaker porcelain casing fragment after the explosion are read and converted into a 3D model file format; a new project is established based on the set 3D modeling software; the shape data and size data of each circuit breaker porcelain casing fragment after the explosion converted into a 3D model file format are imported into the new project based on the import function of the 3D modeling software; the alignment and The splicing tool aligns and splices the porcelain bushing of the circuit breaker to obtain the initial splicing model of the porcelain bushing of the circuit breaker; the initial splicing model of the porcelain bushing of the circuit breaker is optimized; the optimized initial splicing model of the porcelain bushing of the circuit breaker is identified and extracted by image processing technology to obtain the crack position coordinate data, crack shape data, and crack size data of each crack in the complete porcelain bushing of the circuit breaker spliced ​​by the fragments of the porcelain bushing of the circuit breaker, and the crack data is marked in the optimized initial splicing model of the porcelain bushing of the circuit breaker.

[0009] Furthermore, the crack data in the porcelain bushing of the circuit breaker and the material performance data of the porcelain bushing of the circuit breaker are read and analyzed, and the degree of change of the crack data on the material performance data of the porcelain bushing of the circuit breaker is evaluated according to the analysis results, specifically: the crack position coordinate data, crack shape data, and crack size data of each crack are read and analyzed to obtain the geometric shape data of each crack and the distribution information of the crack, and the geometric shape data include the length value, width value, and depth value of the crack; the regional material performance data in the surrounding area set for each crack are obtained, and based on the geometric shape data material of the crack and the distribution information of the crack, a finite element model is established, and according to the density value, elastic modulus value, and thermal expansion coefficient of the porcelain bushing of the circuit breaker, the material stress and deformation conditions around the crack are analyzed, and the regional material performance data are specifically the regional density value, regional elastic modulus value, and regional thermal expansion coefficient in the surrounding area set for the crack.

[0010] Furthermore, based on the geometric shape data of the crack and the distribution information of the crack, a finite element model is established, and the density value, elastic modulus value, and thermal expansion coefficient of the circuit breaker porcelain bushing are analyzed to obtain the stress and deformation conditions of the material around the crack. Specifically: based on the modeling tool in the finite element software, the geometric shape data of each crack is converted into a geometric body in the geometric model; based on the distribution information of the crack, a grid is divided near the crack, and the regional density value, regional elastic modulus value, and regional thermal expansion coefficient in the surrounding area set by the crack are mapped to the corresponding units of the finite element grid; a set load is applied in the surrounding area set by the crack, and the density value, elastic modulus value, and thermal expansion coefficient of the circuit breaker porcelain bushing are analyzed and compared to obtain the impact, pressure, and vibration effects of the explosion on the circuit breaker porcelain bushing and the degree of damage.

[0011] Furthermore, the electrical performance data of each circuit breaker porcelain bushing fragment are read for analysis, and the degree of change of the electrical performance data of each circuit breaker porcelain bushing fragment after the explosion is evaluated based on the analysis results. Specifically, the bushing insulation resistance value, bushing dielectric constant and bushing breakdown voltage value of the circuit breaker porcelain bushing are obtained, and the insulation resistance value, dielectric constant and breakdown voltage value of each circuit breaker porcelain bushing fragment are read; scalar processing is performed based on the bushing insulation resistance value, bushing dielectric constant and bushing breakdown voltage value of the circuit breaker porcelain bushing, and a comprehensive analysis is performed based on the bushing insulation resistance value, bushing dielectric constant and bushing breakdown voltage after scalar processing to obtain the electrical performance analysis index of the circuit breaker porcelain bushing; scalar processing is performed on the insulation resistance value, dielectric constant and breakdown voltage value of each circuit breaker porcelain bushing fragment, and the insulation resistance value, dielectric constant and breakdown voltage value after scalar processing are obtained. The electrical performance analysis index of each circuit breaker porcelain bushing fragment is obtained by analyzing the electrical performance analysis index of each circuit breaker porcelain bushing fragment; the electrical performance analysis index of each circuit breaker porcelain bushing fragment is analyzed separately with the electrical performance analysis index of the circuit breaker porcelain bushing to determine whether there is a circuit breaker porcelain bushing fragment whose electrical performance analysis index does not meet the electrical performance analysis index; the corresponding fragments of the circuit breaker porcelain bushing fragments whose fragment electrical performance analysis index is higher than the electrical performance analysis index in the optimized initial splicing model of the circuit breaker porcelain bushing are marked as explosion electrical performance increased fragments; the corresponding fragments of the circuit breaker porcelain bushing fragments whose fragment electrical performance analysis index is lower than the electrical performance analysis index in the optimized initial splicing model of the circuit breaker porcelain bushing are marked as explosion electrical performance decreased fragments; the calculation formulas of the electrical performance analysis index and the fragment electrical performance analysis index are as follows: Among them, Dq is the electrical performance analysis index, Jy is the bushing insulation resistance value of the circuit breaker porcelain bushing after scalar processing, Jd is the bushing dielectric constant of the circuit breaker porcelain bushing after scalar processing, Jc is the bushing breakdown voltage value of the circuit breaker porcelain bushing after scalar processing, α 1is the proportional coefficient of the insulation resistance value of the porcelain bushing of the circuit breaker after the set scalar processing, α 2 is the proportional coefficient of the dielectric constant of the circuit breaker porcelain bushing after the set scalar processing, α 3 is the proportional coefficient of the bushing breakdown voltage value of the circuit breaker porcelain bushing after the set scalar processing, α 1 +α 2 +α 3 =1, SDq is the electrical performance analysis index of the fragments, SJy is the insulation resistance value of the circuit breaker porcelain bushing fragments after scalar processing, SJd is the dielectric constant of the circuit breaker porcelain bushing fragments after scalar processing, SJc is the breakdown voltage value of the circuit breaker porcelain bushing fragments after scalar processing, β 1 is the proportional coefficient of the insulation resistance value of the circuit breaker porcelain bushing fragments after the set scalar processing, β 2 is the proportional coefficient of the dielectric constant of the circuit breaker porcelain bushing fragments after the set scalar processing, β 3 is the proportional coefficient of the breakdown voltage value of the circuit breaker porcelain bushing fragments after the set scalar processing, β 1 +β 2 +β 3 =1.

[0012] Furthermore, the electrical parameter test data of the circuit breaker porcelain bushing are read for analysis, and the degree of change of the electrical parameter test data of the circuit breaker porcelain bushing after the explosion is evaluated based on the analysis results. Specifically, the analysis is performed through an electrical parameter evaluation model, and the analysis process is as follows: the electric field strength value in a set surrounding area when the circuit breaker porcelain bushing is working normally, the current value carried by the circuit breaker porcelain bushing when working normally, the voltage value on the bushing surface when the circuit breaker porcelain bushing is working normally, the electric field strength value in a set surrounding area when the circuit breaker porcelain bushing explodes, the current value carried by the circuit breaker porcelain bushing when it explodes, and the voltage value on the bushing surface when the circuit breaker porcelain bushing explodes; the electric field strength value in a set surrounding area when the circuit breaker porcelain bushing is working normally, the current value carried by the circuit breaker porcelain bushing when it explodes, and the voltage value on the bushing surface when the circuit breaker porcelain bushing explodes The electric field strength value in the set surrounding area when the circuit breaker porcelain bushing explodes, the current value carried by the circuit breaker porcelain bushing when it works normally, and the voltage value on the bushing surface when the circuit breaker porcelain bushing explodes are respectively input into the electrical parameter evaluation model as the reference electric field strength value, reference current value, and reference voltage value; the electric field strength value in the set surrounding area when the circuit breaker porcelain bushing explodes, the current value carried by the circuit breaker porcelain bushing when it explodes, and the voltage value on the bushing surface when the circuit breaker porcelain bushing explodes are respectively input into the electrical parameter evaluation model, and compared and analyzed with the reference electric field strength value, reference current value, and reference voltage value, respectively, and the optimized initial splicing model of the circuit breaker porcelain bushing is marked according to the comparison and analysis results.

[0013] Further, the temperature data of the porcelain bushing of the circuit breaker is read for analysis, and the degree of change of the temperature data of the porcelain bushing of the circuit breaker after the explosion is evaluated according to the analysis results. Specifically, the normal temperature value of each pre-divided surface area and the normal temperature value of each internal area of ​​the porcelain bushing of the circuit breaker when the porcelain bushing of the circuit breaker is working normally are read, and the explosion temperature value of each pre-divided surface area and the explosion temperature value of each internal area of ​​the porcelain bushing of the circuit breaker when the porcelain bushing of the circuit breaker explodes are read; the normal temperature value of each pre-divided surface area of ​​the porcelain bushing of the circuit breaker when the porcelain bushing of the circuit breaker is working normally are displayed in correspondence with the explosion temperature value of each pre-divided surface area of ​​the porcelain bushing of the circuit breaker when the porcelain bushing of the circuit breaker explodes, the normal temperature value of each pre-divided internal area of ​​the porcelain bushing of the circuit breaker when the porcelain bushing of the circuit breaker is working normally, and the explosion temperature value of each pre-divided internal area of ​​the porcelain bushing of the circuit breaker when the porcelain bushing of the circuit breaker explodes are displayed through a temperature distribution diagram, and a label number is assigned to each area; the surface temperature change of each surface area and the internal temperature change of each internal area of ​​the porcelain bushing of the circuit breaker when the porcelain bushing of the circuit breaker is working normally and when the porcelain bushing of the circuit breaker explodes are calculated respectively; the surface temperature change of each surface area and the internal temperature change of each internal area are judged respectively. The positive or negative value of the internal temperature change amount of the domain is determined, and at the same time, it is determined whether the surface temperature change amount of each surface area and the internal temperature change amount of each internal area are respectively within the set temperature change range; the surface area in the initial splicing model of the optimized circuit breaker porcelain bushing corresponding to the surface temperature change amount that is positive and outside the set temperature change range is marked as the surface explosion temperature rising abnormal temperature area; the surface area in the initial splicing model of the optimized circuit breaker porcelain bushing corresponding to the surface temperature change amount that is negative and outside the set temperature change range is marked as the surface explosion temperature falling abnormal temperature area; the internal area in the initial splicing model of the optimized circuit breaker porcelain bushing corresponding to the internal temperature change amount that is positive and outside the set temperature change range is marked as the internal explosion temperature rising abnormal temperature area; the internal area in the initial splicing model of the optimized circuit breaker porcelain bushing corresponding to the internal temperature change amount that is negative and outside the set temperature change range is marked as the internal explosion temperature falling abnormal temperature area.

[0014] The circuit breaker porcelain bushing explosion characteristic analysis system comprises: a data acquisition subsystem, a data processing and analysis subsystem, a modeling and simulation subsystem, an abnormality detection and early warning subsystem, and a report generation and display subsystem; the data acquisition subsystem is responsible for acquiring the scanning data, electrical performance data, electrical parameter test data, temperature data and material performance data of each circuit breaker porcelain bushing fragment after the explosion, and storing them in a database or a file system; the data processing and analysis subsystem is responsible for processing and analyzing the collected data, including three-dimensional modeling analysis, crack data extraction, material performance analysis, electrical performance analysis and temperature data analysis; the modeling and simulation subsystem is responsible for establishing a mathematical model and a finite element model based on the collected data, and performing simulation and simulation analysis to evaluate the stress and deformation of the circuit breaker porcelain bushing under explosion conditions; the abnormality detection and early warning subsystem is responsible for detecting abnormal conditions and giving early warnings according to the analysis results; the report generation and display subsystem is responsible for generating reports and visualization results according to the analysis results, so that users can understand the analysis results and make corresponding decisions.

[0015] The invention discloses an explosion characteristic analysis device for a circuit breaker porcelain bushing, comprising: a data acquisition module, a three-dimensional modeling analysis module, and a data evaluation and analysis module; the data acquisition module is used to acquire scanning data, electrical performance data, and electrical parameter test data, temperature data, and material performance data of each circuit breaker porcelain bushing fragment after the explosion; the three-dimensional modeling analysis module is used to perform three-dimensional modeling analysis based on the scanning data of each circuit breaker porcelain bushing fragment after the explosion to obtain crack data in the circuit breaker porcelain bushing; the data evaluation and analysis module is used to respectively read the crack data in the circuit breaker porcelain bushing, the electrical performance data of each circuit breaker porcelain bushing fragment, and the electrical parameter test data, temperature data, and material performance data of the circuit breaker porcelain bushing for analysis, and evaluate the degree of change of the material performance data of the circuit breaker porcelain bushing caused by the crack data, and the degree of change of the electrical performance data of each circuit breaker porcelain bushing fragment after the explosion, and the electrical parameter test data and temperature data of the circuit breaker porcelain bushing according to the analysis results.

[0016] The present invention has the following beneficial effects:

[0017] (1) The circuit breaker porcelain bushing explosion characteristic analysis method can comprehensively evaluate the situation after the circuit breaker porcelain bushing explosion by comprehensively considering crack data, electrical performance data, temperature data and material performance data, and provide comprehensive data support for further analysis.

[0018] (2) The circuit breaker porcelain bushing explosion characteristic analysis method can accurately judge the abnormal conditions after the circuit breaker porcelain bushing explosion, such as the increase or decrease of electrical performance and temperature abnormality, by analyzing the electrical performance and temperature data and combining the crack data, thus providing an important reference for subsequent maintenance and improvement.

[0019] (3) The method for analyzing the explosion characteristics of the circuit breaker porcelain bushing can systematically acquire, process and analyze the data after the explosion. The system can provide accurate crack information, material properties and electrical performance changes, thereby helping users to better understand the status of the circuit breaker porcelain bushing. This comprehensive analysis system can monitor potential abnormal conditions in real time and issue early warnings in a timely manner, thereby effectively reducing the losses and risks caused by the explosion of the circuit breaker porcelain bushing.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a flow chart of the method for analyzing explosion characteristics of porcelain bushings of circuit breakers.

[0022] Figure 2 The present invention is a flowchart of the specific steps of obtaining crack data in the porcelain bushing of a circuit breaker in the method for analyzing explosion characteristics of the porcelain bushing of a circuit breaker.

[0023] Figure 3 The block diagram of the explosion characteristic analysis system of the circuit breaker porcelain bushing of the present invention. DETAILED DESCRIPTION

[0024] The embodiments of the present application solve the problem that traditional explosion characteristic analysis methods are usually lacking in comprehensiveness through a method, system and device for analyzing explosion characteristics of a circuit breaker porcelain bushing. They usually analyze the explosion characteristics based on a single indicator or fixed rules, and are unable to fully evaluate the situation of the circuit breaker porcelain bushing after the explosion, including crack conditions, changes in material properties and electrical properties, changes in electrical parameters, and temperature changes, which leads to the problem that the impact of the explosion cannot be fully evaluated.

[0025] The overall idea of ​​the problem in the embodiment of this application is as follows:

[0026] Obtain the fragment scanning data, electrical performance data, temperature data and material performance data of the circuit breaker porcelain bushing after the explosion, perform 3D modeling analysis based on the fragment scanning data to obtain crack data, analyze the crack data and combine it with the electrical performance data, temperature data and material performance data to evaluate the influence of cracks on material and electrical properties, analyze the electrical performance data of each circuit breaker porcelain bushing fragment, evaluate the changes in electrical properties of the fragments after the explosion, analyze the temperature data of the circuit breaker porcelain bushing, evaluate the temperature changes after the explosion, and evaluate the overall situation of the circuit breaker porcelain bushing after the explosion based on the analysis results, including the influence of cracks on material and electrical properties, and changes in electrical properties and temperature.

[0027] See also Figure 1 The embodiment of the present invention provides a technical solution: a method for analyzing explosion characteristics of a circuit breaker porcelain bushing, comprising the following steps: using a high-resolution imaging device or a three-dimensional scanner to scan each circuit breaker porcelain bushing fragment after the explosion, and obtaining scanning data, electrical performance data, and electrical parameter test data, temperature data, and material performance data of each circuit breaker porcelain bushing fragment after the explosion; based on the scanning data of each circuit breaker porcelain bushing fragment after the explosion, importing it into a digital image processing software or a three-dimensional modeling software for three-dimensional modeling analysis, specifically, importing the scanning data into a digital image processing software or a three-dimensional modeling software for three-dimensional modeling analysis, and specifically ... The fragments are input into digital image processing software or three-dimensional modeling software for fragment splicing to obtain crack data in the circuit breaker porcelain bushing; the crack data in the circuit breaker porcelain bushing, the electrical performance data of each circuit breaker porcelain bushing fragment, and the electrical parameter test data, temperature data, and material performance data of the circuit breaker porcelain bushing are read respectively for analysis, and the degree of change of the material performance data of the circuit breaker porcelain bushing caused by the crack data and the degree of change of the electrical performance data of each circuit breaker porcelain bushing fragment, the electrical parameter test data, and the temperature data of the circuit breaker porcelain bushing after the explosion are evaluated according to the analysis results.

[0028] The scanning data of each circuit breaker porcelain bushing fragment after the explosion includes shape data and size data. The electrical performance data includes the insulation resistance value measured by a multimeter, the dielectric constant measured by a dielectric constant tester, and the breakdown voltage measured by a breakdown voltage tester. The electrical parameter test data of the circuit breaker porcelain bushing includes normal electrical parameter test data and explosion electrical parameter test data. The normal electrical parameter test data specifically includes the electric field strength value in a set surrounding area measured by an electric field strength measuring instrument when the circuit breaker porcelain bushing is working normally. The electric field strength measuring instrument may be an electric field meter, an ammeter or a galvanometer to measure the current value carried by the circuit breaker porcelain bushing in normal work, and a voltmeter or a voltmeter to measure the voltage value on the bushing surface of the circuit breaker porcelain bushing in normal work. The explosion electrical parameter test data specifically includes the electric field strength value in a set surrounding area measured by an electric field strength measuring instrument when the circuit breaker porcelain bushing explodes. The electric field strength measuring instrument may be an electric field meter, an ammeter or a galvanometer to measure the current value carried by the circuit breaker porcelain bushing when it explodes, and a voltmeter or a voltmeter to measure the voltage value on the bushing surface of the circuit breaker porcelain bushing when it is working normally. The voltmeter measures the voltage value on the surface of the porcelain bushing of the circuit breaker when the porcelain bushing explodes. The temperature data includes normal temperature data and explosion temperature data. The normal temperature data specifically refers to the normal temperature value of each pre-divided surface area of ​​the porcelain bushing of the circuit breaker when it works normally, which is obtained in real time by using a thermal imager or an infrared thermometer, and the normal temperature value of each pre-divided internal area of ​​the porcelain bushing of the circuit breaker when it works normally, which is measured in real time by using a temperature sensor or thermistor and other equipment. The explosion temperature data specifically refers to the explosion temperature value of each pre-divided surface area of ​​the porcelain bushing of the circuit breaker when it explodes, which is obtained in real time by using a thermal imager or an infrared thermometer, and the explosion temperature value of each pre-divided internal area of ​​the porcelain bushing of the circuit breaker when it explodes, which is measured in real time by using a temperature sensor or thermistor and other equipment. The crack data specifically refers to the crack position coordinate data, crack shape data, and crack size data of each crack in the complete porcelain bushing of the circuit breaker spliced ​​together by the fragments of the porcelain bushing of the circuit breaker. The material performance data of the porcelain bushing of the circuit breaker includes the density value, elastic modulus value, and thermal expansion coefficient of the porcelain bushing of the circuit breaker.

[0029] The measurement method of the insulation resistance value, dielectric constant and breakdown voltage value is as follows: randomly select a position on the circuit breaker porcelain bushing fragment, and measure the insulation resistance value, dielectric constant and breakdown voltage value multiple times, and perform mean analysis on the results of the multiple measurements, and regard the mean result as the insulation resistance value, dielectric constant and breakdown voltage value of the circuit breaker porcelain bushing fragment.

[0030] Specifically, Figure 2As shown, the shape data and size data of each circuit breaker porcelain bushing fragment after the explosion are read and converted into a 3D model file format, such as STL or OBJ, so as to be imported into the 3D modeling software; based on the set 3D modeling software, such as AutoCAD, SolidWorks, Blackender, Rhino, etc., a new project is established or an existing project is opened to prepare for importing the scanned data; based on the import function of the 3D modeling software, the shape data and size data of each circuit breaker porcelain bushing fragment after the explosion converted into the 3D model file format are imported into the new project; once the data is imported, some cleaning work may be required, such as deleting unnecessary parts, repairing possible errors or incomplete geometric shapes, etc.; based on the alignment and splicing tools of the 3D modeling software, the circuit breaker porcelain bushing is aligned and spliced ​​to reconstruct the complete bushing model and obtain the initial splicing of the circuit breaker porcelain bushing. The initial splicing model of the circuit breaker porcelain bushing is optimized, including adjusting the surface smoothness, refining the details, etc., to ensure the quality and accuracy of the model; the optimized initial splicing model of the circuit breaker porcelain bushing is identified and extracted by image processing technology, specifically image segmentation and edge detection technology, to obtain the crack position coordinate data, crack shape data, and crack size data of each crack in the complete circuit breaker porcelain bushing spliced ​​by the circuit breaker porcelain bushing fragments, and the crack data is marked in the optimized initial splicing model of the circuit breaker porcelain bushing.

[0031] In this embodiment, converting the shape and size data into a three-dimensional model file format helps to process the data more carefully, because the three-dimensional model can more accurately capture the shape and size characteristics of the fragments, thereby providing a more accurate basis for subsequent analysis. Modeling based on existing three-dimensional modeling software, such as AutoCAD, SolidWorks, etc., can utilize the rich functions and tools that these software already have, improve modeling efficiency and accuracy, and reduce the need for repetitive work. After importing the data, the cleaning tools of the modeling software can be used to clean and repair the data, delete unnecessary parts, and repair possible errors or incomplete geometric shapes, so as to obtain a more complete and accurate model. The alignment and splicing tools of the modeling software can be used to align and splice the fragments to reconstruct a complete casing model, which helps to better understand the casing condition after the explosion. Optimizing the initial splicing model, including adjusting the surface smoothness, refining the details, etc., can improve the quality and accuracy of the model and make it more in line with the actual situation. The optimized model is identified and extracted by image processing technology to obtain the position, shape and size data of each crack, and the crack data is marked in the model, which provides important data support for subsequent analysis and evaluation.

[0032] Specifically, the crack data in the porcelain bushing of the circuit breaker and the material performance data of the porcelain bushing of the circuit breaker are read, and the change degree of the material performance data of the porcelain bushing of the circuit breaker by the crack data is evaluated according to the analysis results. Specifically, the crack position coordinate data, crack shape data, and crack size data of each crack are read and analyzed to obtain the geometric shape data of each crack and the distribution information of the crack, and the geometric shape data includes the length value, width value, and depth value of the crack; the regional material performance data within the surrounding area set for each crack is obtained, and based on the geometric shape data of the crack, the distribution information of the crack, and the material performance data of the crack, an evaluation index is established. A finite element model is established, and the density value, elastic modulus value, and thermal expansion coefficient of the circuit breaker porcelain bushing are analyzed to obtain the stress and deformation conditions of the material around the crack. The regional material performance data are specifically the regional density value, regional elastic modulus value, and regional thermal expansion coefficient in the surrounding area set by the crack; the specific steps for obtaining the regional density value, regional elastic modulus value, and regional thermal expansion coefficient are: respectively obtain the density value, elastic modulus value, and thermal expansion coefficient of each position point in the surrounding area set by the crack and perform mean analysis respectively, and regard the mean results as the regional density value, regional elastic modulus value, and regional thermal expansion coefficient.

[0033] In this implementation scheme, the position coordinates, shape and size data of each crack are read, and a geometric shape analysis is performed, including parameters such as the length, width and depth of the crack. These analyses help to accurately understand the geometric shape characteristics of the cracks, provide a data basis for subsequent simulation analysis, and obtain material performance data of the area around each crack, including the density, elastic modulus and thermal expansion coefficient in the area. By analyzing the material performance data of the area around the crack, the degree of influence of the crack on the material performance can be understood. Based on the geometric shape of the crack and the regional material performance data, a finite element model is established for analysis. The finite element model can simulate the stress and deformation of the material around the crack, thereby evaluating the impact of the crack on the casing and the density of the area around the crack. , elastic modulus and thermal expansion coefficient are analyzed to obtain the average performance data of the region, which helps to more accurately evaluate the impact of cracks on regional material properties. Through detailed crack data analysis and regional material performance data acquisition, the impact of cracks on circuit breaker porcelain bushings can be more accurately evaluated, providing an important basis for subsequent repair and prevention. The use of finite element models to analyze the stress and deformation conditions around the cracks helps to establish a more sophisticated model and improve the understanding and prediction of the explosion characteristics of the bushing. Through detailed analysis of cracks and regional material performance data, the stress and deformation conditions of circuit breaker porcelain bushings under explosion conditions can be better understood, thereby improving the efficiency and accuracy of technical problem solving.

[0034] Specifically, based on the geometric shape data of the crack and the distribution information of the crack, a finite element model is established, and the density value, elastic modulus value and thermal expansion coefficient of the circuit breaker porcelain bushing are analyzed to obtain the stress and deformation conditions of the material around the crack. Specifically: based on the modeling tool in the finite element software, the geometric shape data of each crack is converted into a geometric body in the geometric model; based on the distribution information of the crack, grid division is performed near the crack to better capture the stress concentration area caused by the crack, and according to the geometric shape data of the crack, the grid density is specially adjusted to ensure that the grid around the crack is fine enough, and the regional density value, regional elastic modulus value and regional thermal expansion coefficient in the set surrounding area of ​​the crack are mapped to the corresponding units of the finite element grid, so that the properties of the material around the crack can be simulated more accurately, thereby more realistically reflecting the impact of the crack; set load or displacement boundary conditions are applied in the set surrounding area of ​​the crack to simulate the stress concentration phenomenon caused by the crack. These boundary conditions should be able to reflect the impact of cracks to ensure the accuracy of the simulation results, and analyze and compare the density, elastic modulus, and thermal expansion coefficient of the circuit breaker porcelain bushing to obtain the impact, pressure, and vibration of the explosion on the circuit breaker porcelain bushing, as well as the degree of damage, including cracks, deformation, and fracture.

[0035] In this embodiment, the modeling tools in the finite element software are used to convert the geometric shape data of each crack into a geometric body in the geometric model. This step ensures that the shape and size of the crack can be accurately represented in the finite element model. According to the distribution information of the crack, grid division is performed near the crack, and the grid density is specially adjusted to ensure that the grid around the crack is fine enough. This can better capture the stress concentration area caused by the crack and improve the accuracy of the simulation. The regional density value, regional elastic modulus value, and regional thermal expansion coefficient in the surrounding area of ​​the crack are mapped to the corresponding units of the finite element grid. This can more accurately simulate the properties of the material around the crack, thereby more realistically reflecting the impact of the crack. The set load or displacement boundary conditions are applied in the surrounding area of ​​the crack to simulate the stress concentration caused by the crack. Phenomenon, these boundary conditions should be able to reflect the influence of cracks and ensure the accuracy of simulation results. By carefully processing the crack geometry model and regional property mapping, and applying appropriate boundary conditions, the stress and deformation of the material around the crack can be simulated more accurately, thereby improving the understanding and prediction of the explosion characteristics of the circuit breaker porcelain bushing. By adjusting the grid density and mapping regional properties, the stress concentration area caused by the crack can be better captured, and the accuracy of the finite element simulation can be improved, so as to more accurately evaluate the stress and deformation of the circuit breaker porcelain bushing under explosion conditions. This process provides an effective method and tool for solving key technical problems in the analysis of the explosion characteristics of the circuit breaker porcelain bushing, which helps engineers better understand and predict the behavior of the circuit breaker porcelain bushing under explosion conditions, thereby guiding repair and improvement work.

[0036] Specifically, the electrical performance data of each circuit breaker porcelain bushing fragment are read for analysis, and the degree of change of the electrical performance data of each circuit breaker porcelain bushing fragment after the explosion is evaluated based on the analysis results. Specifically, the bushing insulation resistance value, bushing dielectric constant, and bushing breakdown voltage value of the circuit breaker porcelain bushing are obtained, and the insulation resistance value, dielectric constant, and breakdown voltage value of each circuit breaker porcelain bushing fragment are read; scalar processing is performed on the bushing insulation resistance value, dielectric constant, and bushing breakdown voltage value of the circuit breaker porcelain bushing, and a comprehensive analysis is performed on the bushing insulation resistance value, dielectric constant, and bushing breakdown voltage after scalar processing to obtain the electrical performance analysis index of the circuit breaker porcelain bushing; scalar processing is performed on the insulation resistance value, dielectric constant, and breakdown voltage value of each circuit breaker porcelain bushing fragment, and the insulation resistance value, dielectric constant, and breakdown voltage value after scalar processing are obtained. The voltage is analyzed to obtain the electrical performance analysis index of each circuit breaker porcelain bushing fragment; the electrical performance analysis index of each circuit breaker porcelain bushing fragment is analyzed separately with the electrical performance analysis index of the circuit breaker porcelain bushing to determine whether there are circuit breaker porcelain bushing fragments whose electrical performance analysis index does not meet the electrical performance analysis index; the circuit breaker porcelain bushing fragments whose fragment electrical performance analysis index is higher than the electrical performance analysis index in the optimized initial splicing model of the circuit breaker porcelain bushing are marked as explosion electrical performance increased fragments; the circuit breaker porcelain bushing fragments whose fragment electrical performance analysis index is lower than the electrical performance analysis index in the optimized initial splicing model of the circuit breaker porcelain bushing are marked as explosion electrical performance decreased fragments; the calculation formulas of the electrical performance analysis index and the fragment electrical performance analysis index are as follows: Among them, Dq is the electrical performance analysis index, Jy is the bushing insulation resistance value of the circuit breaker porcelain bushing after scalar processing, Jd is the bushing dielectric constant of the circuit breaker porcelain bushing after scalar processing, Jc is the bushing breakdown voltage value of the circuit breaker porcelain bushing after scalar processing, α 1 is the proportional coefficient of the insulation resistance value of the porcelain bushing of the circuit breaker after the set scalar processing, α 2 is the proportional coefficient of the dielectric constant of the circuit breaker porcelain bushing after the set scalar processing, α 3 is the proportional coefficient of the bushing breakdown voltage value of the circuit breaker porcelain bushing after the set scalar processing, α 1 +α 2 +α 3 =1, SDq is the electrical performance analysis index of the fragments, SJy is the insulation resistance value of the circuit breaker porcelain bushing fragments after scalar processing, SJd is the dielectric constant of the circuit breaker porcelain bushing fragments after scalar processing, SJc is the breakdown voltage value of the circuit breaker porcelain bushing fragments after scalar processing, β 1 is the proportional coefficient of the insulation resistance value of the circuit breaker porcelain bushing fragments after the set scalar processing, β2 is the proportional coefficient of the dielectric constant of the circuit breaker porcelain bushing fragments after the set scalar processing, β 3 is the proportional coefficient of the breakdown voltage value of the circuit breaker porcelain bushing fragments after the set scalar processing, β 1 +β 2 +β 3 =1.

[0037] In this implementation scheme, the insulation resistance value, dielectric constant, breakdown voltage value and other electrical performance data of each circuit breaker porcelain bushing fragment are read, and based on the electrical performance data of the circuit breaker porcelain bushing, scalar processing is performed to obtain a comprehensive electrical performance analysis index, which is used to evaluate the electrical performance change of the overall bushing. The electrical performance data of each fragment is scalarly processed to obtain the electrical performance analysis index of the fragment, and the electrical performance analysis index of each fragment is compared with the electrical performance analysis index of the overall bushing, and the fragments with increased or decreased electrical performance are marked. According to the set proportionality coefficient, the electrical performance analysis index and the electrical performance analysis index of the fragment are calculated. , in order to quantitatively evaluate the changes in electrical performance. By analyzing the electrical performance of each fragment and comparing it with the performance of the overall bushing, the changes in the electrical performance of the circuit breaker porcelain bushing after the explosion can be comprehensively evaluated, which helps to identify potential problem areas. Fragments with increased or decreased electrical performance are marked in the optimized bushing model, which helps engineers quickly locate areas where problems may exist and provides an important reference for subsequent repairs and improvements. Through scalar processing and proportional coefficient calculation, the changes in electrical performance are quantified into indicators, making the evaluation more objective and accurate, and helping to take necessary measures in a timely manner to ensure the safe operation of the equipment.

[0038] Specifically, the electrical parameter test data of the circuit breaker porcelain bushing is read for analysis, and the degree of change of the electrical parameter test data of the circuit breaker porcelain bushing after the explosion is evaluated according to the analysis results. Specifically, the analysis is performed through an electrical parameter evaluation model, and the analysis process is as follows: the electric field strength value in a set surrounding area when the circuit breaker porcelain bushing is working normally, the current value carried by the circuit breaker porcelain bushing when working normally, the voltage value on the bushing surface when the circuit breaker porcelain bushing is working normally, the electric field strength value in a set surrounding area when the circuit breaker porcelain bushing explodes, the current value carried by the circuit breaker porcelain bushing when the circuit breaker explodes, and the voltage value on the bushing surface when the circuit breaker porcelain bushing explodes are read; the electric field strength value in a set surrounding area when the circuit breaker porcelain bushing is working normally, the current value carried by the circuit breaker porcelain bushing when the circuit breaker explodes, and the voltage value on the bushing surface when the circuit breaker porcelain bushing explodes are read; The electric field strength value in the domain, the current value carried by the circuit breaker porcelain bushing in normal operation, and the voltage value on the bushing surface of the circuit breaker porcelain bushing in normal operation are respectively input into the electrical parameter evaluation model as the reference electric field strength value, reference current value, and reference voltage value; the electric field strength value in the set surrounding area when the circuit breaker porcelain bushing explodes, the current value carried by the circuit breaker porcelain bushing when it explodes, and the voltage value on the bushing surface when the circuit breaker porcelain bushing explodes are respectively input into the electrical parameter evaluation model, and compared and analyzed with the reference electric field strength value, reference current value, and reference voltage value, respectively, and the optimized initial splicing model of the circuit breaker porcelain bushing is marked according to the comparison and analysis results; the electrical parameter evaluation model is specifically as follows: Among them, DcQ is the electric field strength value in the set surrounding area when the porcelain bushing of the circuit breaker explodes, CkD is the electric field strength value in the set surrounding area when the porcelain bushing of the circuit breaker works normally, that is, the reference electric field strength value, Sd is when the electric field strength value in the set surrounding area when the porcelain bushing of the circuit breaker explodes is higher than the electric field strength value in the set surrounding area when the porcelain bushing of the circuit breaker works normally, the optimized initial splicing model of the porcelain bushing of the circuit breaker is marked as an electric field strength increase model, Xd is when the electric field strength value in the set surrounding area when the porcelain bushing of the circuit breaker explodes is lower than the electric field strength value in the set surrounding area when the porcelain bushing of the circuit breaker works normally, the optimized initial splicing model of the porcelain bushing of the circuit breaker is marked as an electric field strength decrease model, DLq is the current value carried by the porcelain bushing of the circuit breaker when it explodes, CkL is the current value carried by the porcelain bushing of the circuit breaker when it works normally, that is, the reference electric current value, and SL is the current value carried when the porcelain bushing of the circuit breaker explodes When the current value is higher than the current value carried by the circuit breaker porcelain bushing when it explodes, the optimized initial splicing model of the circuit breaker porcelain bushing is marked as a current rising model. XL is when the current value carried by the circuit breaker porcelain bushing when it explodes is lower than the current value carried by the circuit breaker porcelain bushing when it explodes, the optimized initial splicing model of the circuit breaker porcelain bushing is marked as a current falling model. DY is the voltage value on the bushing surface when the circuit breaker porcelain bushing explodes, and Cky is the voltage value on the bushing surface when the circuit breaker porcelain bushing is working normally. The voltage value is the reference voltage value, SY is when the voltage value on the casing surface of the circuit breaker porcelain casing explodes is higher than the voltage value on the casing surface of the circuit breaker porcelain casing when it is working normally, the optimized initial splicing model of the circuit breaker porcelain casing is marked as a voltage rise model, XY is when the voltage value on the casing surface of the circuit breaker porcelain casing explodes is lower than the voltage value on the casing surface of the circuit breaker porcelain casing when it is working normally, the optimized initial splicing model of the circuit breaker porcelain casing is marked as a voltage drop model.

[0039] In this implementation scheme, the test data of the electrical parameters such as the electric field strength value, current value, voltage value, etc. of the porcelain bushing of the circuit breaker during normal operation and explosion are read, and an electrical parameter evaluation model is established based on the set reference electric field strength value, current value, and voltage value, which is used to compare and analyze the changes in the electrical parameters of the bushing after the explosion, and the electrical parameters of the bushing after the explosion are compared and analyzed with the reference values ​​during normal operation, and the optimized bushing model is marked according to the comparison results to identify the rising or falling mode of the electrical parameters, and the changes in the electrical parameters are calculated according to the set proportional coefficient and threshold value, and the marking of the bushing model is determined. By establishing the electrical parameter evaluation model, the changes in the parameters such as the electric field strength, current, and voltage of the bushing after the explosion are comprehensively evaluated, which provides an important basis for determining the electrical safety of the bushing, and according to the comparative analysis results, the changes in the electrical parameters of the optimized bushing model are accurately marked, which provides guidance for subsequent inspection and maintenance, and the changes in the electrical parameters are quantified into marks through the set proportional coefficient and threshold value, so that the evaluation is more objective and accurate, which helps to timely discover and solve potential electrical safety hazards.

[0040] Specifically, the temperature data of the porcelain bushing of the circuit breaker is read for analysis, and the degree of change of the temperature data of the porcelain bushing of the circuit breaker after the explosion is evaluated according to the analysis results. Specifically, the normal temperature value of each pre-divided surface area when the porcelain bushing of the circuit breaker is working normally, the normal temperature value of each internal area, the explosion temperature value of each pre-divided surface area when the porcelain bushing of the circuit breaker explodes, and the explosion temperature value of each internal area are read; the normal temperature value of each pre-divided surface area when the porcelain bushing of the circuit breaker is working normally and the explosion temperature value of each pre-divided surface area when the porcelain bushing of the circuit breaker explodes are displayed in correspondence with the explosion temperature value of each pre-divided surface area when the porcelain bushing of the circuit breaker is working normally, the normal temperature value of each pre-divided internal area when the porcelain bushing of the circuit breaker is working normally, and the explosion temperature value of each pre-divided internal area when the porcelain bushing of the circuit breaker explodes are displayed through a temperature distribution diagram, and a label number is assigned to each area; the surface temperature change of each surface area when the porcelain bushing of the circuit breaker is working normally and the internal temperature change of each internal area are calculated respectively, which is specifically the explosion temperature value minus the normal temperature value; the surface temperature change of each surface area is judged respectively. The positive and negative values ​​of the internal temperature change amount of each area inside the circuit breaker are determined, and at the same time, it is determined whether the surface temperature change amount of each area on the surface and the internal temperature change amount of each area inside are respectively within the set temperature change range; the surface area in the initial splicing model of the optimized circuit breaker porcelain bushing corresponding to the surface temperature change amount that is positive and outside the set temperature change range is marked as the abnormal temperature area of ​​surface explosion temperature rise; the surface area in the initial splicing model of the optimized circuit breaker porcelain bushing corresponding to the surface temperature change amount that is negative and outside the set temperature change range is marked as the abnormal temperature area of ​​surface explosion temperature drop; the internal area in the initial splicing model of the optimized circuit breaker porcelain bushing corresponding to the internal temperature change amount that is positive and outside the set temperature change range is marked as the abnormal temperature area of ​​internal explosion temperature rise; the internal area in the initial splicing model of the optimized circuit breaker porcelain bushing corresponding to the internal temperature change amount that is negative and outside the set temperature change range is marked as the abnormal temperature area of ​​internal explosion temperature drop.

[0041] In this implementation scheme, the temperature data of the surface and internal areas of the circuit breaker porcelain bushing during normal operation and explosion are read, and the temperature data during normal operation and explosion are displayed correspondingly through a temperature distribution diagram, and a label number is assigned to each area for further analysis. The temperature change of each surface and internal area is calculated separately, that is, the explosion temperature value minus the normal temperature value, to quantify the temperature change. According to the set temperature change interval and positive and negative value judgment criteria, the surface and internal areas where the temperature change exceeds the set range are marked as abnormal temperature areas, which are divided into two situations: temperature rise and temperature drop. Through the analysis of the temperature of the surface and internal areas, the temperature change of the circuit breaker porcelain bushing after the explosion is comprehensively evaluated, which is helpful to discover abnormal temperature areas and take timely measures. By calculating the temperature change and judging and marking according to the set standards, the identification of abnormal temperature areas is more objective and accurate, which provides a basis for subsequent processing. By marking abnormal temperature areas, it helps engineers to promptly discover and solve the abnormal temperature situation after the circuit breaker porcelain bushing explodes, thereby improving the safety and reliability of the equipment.

[0042] See also Figure 3 The circuit breaker porcelain bushing explosion characteristic analysis system includes: data acquisition subsystem, data processing and analysis subsystem, modeling and simulation subsystem, anomaly detection and early warning subsystem, report generation and display subsystem; the data acquisition subsystem is responsible for acquiring the scanning data, electrical performance data, electrical parameter test data, temperature data and material performance data of each circuit breaker porcelain bushing fragment after the explosion, and storing them in a database or file system; the data processing and analysis subsystem is responsible for processing and analyzing the collected data, including three-dimensional modeling analysis, crack data extraction, material performance analysis, electrical performance analysis and temperature data analysis; the modeling and simulation subsystem is responsible for establishing mathematical models and finite element models based on the collected data, and performing simulation and simulation analysis to evaluate the stress and deformation of the circuit breaker porcelain bushing under explosion conditions; the anomaly detection and early warning subsystem is responsible for detecting abnormal conditions and giving early warnings based on the analysis results, such as electrical performance degradation, abnormal temperature increase, etc.; the report generation and display subsystem is responsible for generating reports and visualization results based on the analysis results, so that users can understand the analysis results and make corresponding decisions.

[0043] The invention discloses an explosion characteristic analysis device for porcelain bushings of circuit breakers, comprising: a data acquisition module, a three-dimensional modeling analysis module, and a data evaluation and analysis module; the data acquisition module is used to acquire scanning data, electrical performance data, and electrical parameter test data, temperature data, and material performance data of each porcelain bushing fragment of the circuit breaker after the explosion; the three-dimensional modeling analysis module is used to perform three-dimensional modeling analysis based on the scanning data of each porcelain bushing fragment of the circuit breaker after the explosion, so as to obtain crack data in the porcelain bushings of the circuit breaker; the data evaluation and analysis module is used to respectively read the crack data in the porcelain bushings of the circuit breaker, the electrical performance data of each porcelain bushing fragment of the circuit breaker, and the electrical parameter test data, temperature data, and material performance data of the porcelain bushings of the circuit breaker for analysis, and to evaluate the degree of change of the material performance data of the porcelain bushings of the circuit breaker caused by the crack data, and the degree of change of the electrical performance data of each porcelain bushing fragment of the circuit breaker after the explosion, and the electrical parameter test data and temperature data of the porcelain bushings of the circuit breaker according to the analysis results.

[0044] In summary, this application has at least the following effects:

[0045] By comprehensively considering crack data, electrical performance data, temperature data, and material performance data, the situation after the explosion of the circuit breaker porcelain bushing can be fully evaluated, providing comprehensive data support for further analysis.

[0046] By analyzing the electrical performance and temperature data and combining it with the crack data, we can accurately judge the abnormal conditions after the explosion of the circuit breaker porcelain bushing, such as the increase or decrease of electrical performance and abnormal temperature, which provides an important reference for subsequent maintenance and improvement.

[0047] By systematically acquiring, processing and analyzing post-explosion data, the system can provide accurate crack information, material properties and electrical performance changes, thereby helping users better understand the status of the circuit breaker porcelain bushing. This comprehensive analysis system can monitor potential abnormal conditions in real time and issue early warnings in a timely manner, thereby effectively reducing the losses and risks caused by circuit breaker porcelain bushing explosions.

[0048] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0049] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for analyzing explosion characteristics of porcelain bushings of circuit breakers, characterized in that: The following steps are involved: Obtain scanning data, electrical performance data of each circuit breaker porcelain bushing fragment after the explosion, as well as electrical parameter test data, temperature data, and material performance data of the circuit breaker porcelain bushing; Based on the scanning data of each circuit breaker porcelain bushing fragment after the explosion, a 3D modeling analysis was performed to obtain the crack data in the circuit breaker porcelain bushing; Read the crack data in the porcelain bushing of the circuit breaker, the electrical performance data of each porcelain bushing fragment of the circuit breaker, the electrical parameter test data, the temperature data, and the material performance data of the porcelain bushing of the circuit breaker respectively for analysis, and evaluate the degree of change of the material performance data of the porcelain bushing of the circuit breaker caused by the crack data, and the degree of change of the electrical performance data of each porcelain bushing fragment of the circuit breaker, the electrical parameter test data, and the temperature data of the porcelain bushing of the circuit breaker after the explosion according to the analysis results; The scanning data of each circuit breaker porcelain bushing fragment after the explosion includes shape data and size data, the electrical performance data includes insulation resistance value, dielectric constant, and breakdown voltage value, the electrical parameter test data of the circuit breaker porcelain bushing includes normal electrical parameter test data and explosion electrical parameter test data, the normal electrical parameter test data specifically includes the electric field strength value in the set surrounding area when the circuit breaker porcelain bushing is working normally, the current value carried by the circuit breaker porcelain bushing when working normally, and the voltage value on the bushing surface when the circuit breaker porcelain bushing is working normally, the explosion electrical parameter test data specifically includes the electric field strength value in the set surrounding area when the circuit breaker porcelain bushing explodes, the current value carried by the circuit breaker porcelain bushing when exploding, and the voltage value on the bushing surface when the circuit breaker porcelain bushing explodes, the temperature data includes normal temperature data. The normal temperature data are specifically the normal temperature value of each pre-divided surface area of ​​the circuit breaker porcelain bushing when it is working normally, and the normal temperature value of each pre-divided internal area of ​​the circuit breaker porcelain bushing when it is working normally, and the explosion temperature data are specifically the explosion temperature value of each pre-divided surface area of ​​the circuit breaker porcelain bushing when it is exploding, and the explosion temperature value of each pre-divided internal area of ​​the circuit breaker porcelain bushing when it is exploding, and the crack data are specifically the crack position coordinate data, crack shape data, and crack size data of each crack in the complete circuit breaker porcelain bushing formed by splicing the circuit breaker porcelain bushing fragments, and the material performance data of the circuit breaker porcelain bushing include the density value, elastic modulus value, and thermal expansion coefficient of the circuit breaker porcelain bushing; Based on the scanning data of each circuit breaker porcelain bushing fragment after the explosion, a 3D modeling analysis was performed to obtain the crack data in the circuit breaker porcelain bushing: Read the shape data and size data of each circuit breaker porcelain casing fragment after the explosion and convert them into a 3D model file format; Create new projects based on the specified 3D modeling software; Based on the import function of the 3D modeling software, the shape data and size data of each circuit breaker porcelain bushing fragment after the explosion, which are converted into a 3D model file format, are imported into the new project; Align and splice the porcelain bushing of the circuit breaker based on the alignment and splicing tools of the 3D modeling software to obtain the initial splicing model of the porcelain bushing of the circuit breaker; Optimize the initial splicing model of the circuit breaker porcelain bushing; By using image processing technology, the optimized initial splicing model of the circuit breaker porcelain bushing is identified and extracted to obtain the crack position coordinate data, crack shape data, and crack size data of each crack in the complete circuit breaker porcelain bushing spliced ​​by the circuit breaker porcelain bushing fragments, and the crack data is marked in the optimized initial splicing model of the circuit breaker porcelain bushing; Read the crack data in the circuit breaker porcelain bushing and analyze the material performance data of the circuit breaker porcelain bushing. According to the analysis results, evaluate the degree of change of the crack data on the material performance data of the circuit breaker porcelain bushing. Specifically: Read the crack position coordinate data, crack shape data, and crack size data of each crack and analyze them to obtain the geometric shape data of each crack and the distribution information of the crack, wherein the geometric shape data includes the length value, width value, and depth value of the crack; The regional material performance data in the surrounding area set for each crack is obtained, and a finite element model is established based on the geometric shape data material of the crack and the distribution information of the crack. The density value, elastic modulus value, and thermal expansion coefficient of the circuit breaker porcelain bushing are analyzed to obtain the stress and deformation conditions of the material around the crack. The regional material performance data specifically include the regional density value, regional elastic modulus value, and regional thermal expansion coefficient in the surrounding area set for the crack.

2. The method for analyzing explosion characteristics of a circuit breaker porcelain bushing according to claim 1, characterized in that: Based on the geometric shape data of the cracks and the distribution information of the cracks, a finite element model was established, and the density, elastic modulus and thermal expansion coefficient of the circuit breaker porcelain bushing were analyzed to obtain the material stress and deformation around the cracks as follows: The geometric shape data of each crack is converted into a geometric body in a geometric model based on the modeling tool in the finite element software; Based on the distribution information of the cracks, meshing is performed near the cracks, and the regional density value, regional elastic modulus value, and regional thermal expansion coefficient in the surrounding area of ​​the crack setting are mapped to the corresponding units of the finite element mesh; A set load is applied to the surrounding area of ​​the crack, and the density, elastic modulus and thermal expansion coefficient of the circuit breaker porcelain bushing are analyzed and compared to obtain the impact, pressure and vibration effects of the explosion on the circuit breaker porcelain bushing and the degree of damage.

3. The method for analyzing explosion characteristics of circuit breaker porcelain bushing according to claim 1, characterized in that: The electrical performance data of each circuit breaker porcelain bushing fragment is read and analyzed, and the degree of change of the electrical performance data of each circuit breaker porcelain bushing fragment after the explosion is evaluated based on the analysis results: Obtain the bushing insulation resistance value, bushing dielectric constant, and bushing breakdown voltage value of the circuit breaker porcelain bushing, and read the insulation resistance value, dielectric constant, and breakdown voltage value of each circuit breaker porcelain bushing fragment; Based on the bushing insulation resistance value, bushing dielectric constant and bushing breakdown voltage value of the circuit breaker porcelain bushing, scalar processing is performed, and based on the bushing insulation resistance value, bushing dielectric constant and bushing breakdown voltage after scalar processing, a comprehensive analysis is performed to obtain the electrical performance analysis index of the circuit breaker porcelain bushing; The insulation resistance value, dielectric constant, and breakdown voltage value of each circuit breaker porcelain bushing fragment are processed in scalar quantity, and the electrical performance analysis index of each circuit breaker porcelain bushing fragment is obtained based on the insulation resistance value, dielectric constant, and breakdown voltage after scalar quantity processing; Analyze the electrical performance analysis index of each circuit breaker porcelain bushing fragment and the electrical performance analysis index of the circuit breaker porcelain bushing respectively, and determine whether there is a circuit breaker porcelain bushing fragment whose electrical performance analysis index does not meet the electrical performance analysis index; The fragments corresponding to the circuit breaker porcelain bushing fragments whose fragment electrical performance analysis index is higher than the electrical performance analysis index in the optimized initial splicing model of the circuit breaker porcelain bushing are marked as explosion electrical performance increased fragments; The corresponding fragments of the circuit breaker porcelain bushing fragments whose fragment electrical performance analysis index is lower than the electrical performance analysis index in the optimized initial splicing model of the circuit breaker porcelain bushing are marked as explosion electrical performance degradation fragments; The calculation formulas of the electrical performance analysis index and the fragment electrical performance analysis index are as follows: Wherein, Dq is the electrical performance analysis index, Jy is the bushing insulation resistance value of the circuit breaker porcelain bushing after scalar processing, Jd is the bushing dielectric constant of the circuit breaker porcelain bushing after scalar processing, Jc is the bushing breakdown voltage value of the circuit breaker porcelain bushing after scalar processing, α1 is the proportional coefficient of the bushing insulation resistance value of the circuit breaker porcelain bushing after scalar processing, α2 is the proportional coefficient of the bushing dielectric constant of the circuit breaker porcelain bushing after scalar processing, α3 is the proportional coefficient of the bushing breakdown voltage value of the circuit breaker porcelain bushing after scalar processing, α1+α2+α3=1, S Dq is the electrical performance analysis index of the fragments, SJy is the insulation resistance value of the circuit breaker porcelain bushing fragments after scalar processing, SJd is the dielectric constant of the circuit breaker porcelain bushing fragments after scalar processing, SJc is the breakdown voltage value of the circuit breaker porcelain bushing fragments after scalar processing, β1 is the proportional coefficient of the insulation resistance value of the circuit breaker porcelain bushing fragments after the set scalar processing, β2 is the proportional coefficient of the dielectric constant of the circuit breaker porcelain bushing fragments after the set scalar processing, β3 is the proportional coefficient of the breakdown voltage value of the circuit breaker porcelain bushing fragments after the set scalar processing, β1+β2+β3=1.

4. The method for analyzing explosion characteristics of a circuit breaker porcelain bushing according to claim 1, characterized in that: The electrical parameter test data of the circuit breaker porcelain bushing is read and analyzed, and the degree of change of the electrical parameter test data of the circuit breaker porcelain bushing after the explosion is evaluated based on the analysis results. The analysis is specifically performed through the electrical parameter evaluation model, and the analysis process is as follows: Read the electric field strength value in the set surrounding area when the circuit breaker porcelain bushing is working normally, the current value carried by the circuit breaker porcelain bushing when working normally, the voltage value on the bushing surface when the circuit breaker porcelain bushing is working normally, the electric field strength value in the set surrounding area when the circuit breaker porcelain bushing explodes, the current value carried by the circuit breaker porcelain bushing when it explodes, and the voltage value on the bushing surface when the circuit breaker porcelain bushing explodes; The electric field strength value in the set surrounding area when the circuit breaker porcelain bushing is working normally, the current value carried by the circuit breaker porcelain bushing when working normally, and the voltage value on the bushing surface when the circuit breaker porcelain bushing is working normally are respectively input into the electrical parameter evaluation model as a reference electric field strength value, a reference current value, and a reference voltage value; The electric field strength value in the set surrounding area when the circuit breaker porcelain bushing explodes, the current value carried by the circuit breaker porcelain bushing when it explodes, and the voltage value on the bushing surface when the circuit breaker porcelain bushing explodes are respectively input into the electrical parameter evaluation model, and compared and analyzed with the reference electric field strength value, reference current value, and reference voltage value, respectively. According to the comparison and analysis results, the optimized initial splicing model of the circuit breaker porcelain bushing is marked.

5. The method for analyzing explosion characteristics of circuit breaker porcelain bushing according to claim 1, characterized in that: The temperature data of the circuit breaker porcelain bushing is read and analyzed, and the degree of change of the temperature data of the circuit breaker porcelain bushing after the explosion is evaluated based on the analysis results: Read the normal temperature value of each pre-divided surface area and each internal area of ​​the circuit breaker porcelain bushing when it is working normally, and the explosion temperature value of each pre-divided surface area and each internal area when the circuit breaker porcelain bushing explodes; The normal temperature value of each pre-divided surface area of ​​the circuit breaker porcelain bushing when it is working normally, the explosion temperature value of each pre-divided surface area when the circuit breaker porcelain bushing explodes, the normal temperature value of each pre-divided internal area of ​​the circuit breaker porcelain bushing when it is working normally, and the explosion temperature value of each pre-divided internal area when the circuit breaker porcelain bushing explodes are displayed correspondingly through the temperature distribution diagram, and a label serial number is assigned to each area; Calculate the surface temperature change of each area of ​​the circuit breaker porcelain bushing when it is working normally and when it explodes, and the internal temperature change of each area inside; Determine the positive and negative values ​​of the surface temperature change of each area on the surface and the internal temperature change of each area inside, and determine whether the surface temperature change of each area on the surface and the internal temperature change of each area inside are within the set temperature change range; Mark the surface area in the optimized initial splicing model of the circuit breaker porcelain bushing corresponding to the surface temperature variation amount which is positive and outside the set temperature variation range as the surface explosion temperature rise abnormal temperature area; The surface area in the optimized initial splicing model of the circuit breaker porcelain bushing corresponding to the surface temperature variation amount which is negative and outside the set temperature variation range is marked as the abnormal temperature area of ​​surface explosion temperature drop; Marking the internal area in the optimized initial splicing model of the circuit breaker porcelain bushing corresponding to the internal temperature variation amount which is positive and outside the set temperature variation range as the internal explosion temperature rising abnormal temperature area; The internal area in the optimized initial splicing model of the circuit breaker porcelain bushing corresponding to the internal temperature variation amount which is negative and outside the set temperature variation range is marked as the abnormal temperature area of ​​internal explosion temperature drop.

6. A circuit breaker porcelain bushing explosion characteristic analysis system, using the circuit breaker porcelain bushing explosion characteristic analysis method according to any one of claims 1 to 5, characterized in that: include: Data acquisition subsystem, data processing and analysis subsystem, modeling and simulation subsystem, anomaly detection and early warning subsystem, report generation and display subsystem; The data acquisition subsystem is responsible for acquiring scanning data, electrical performance data, electrical parameter test data, temperature data and material performance data of each circuit breaker porcelain bushing fragment after the explosion, and storing them in a database or file system; The data processing and analysis subsystem is responsible for processing and analyzing the collected data, including three-dimensional modeling analysis, crack data extraction, material performance analysis, electrical performance analysis, and temperature data analysis; The modeling and simulation subsystem is responsible for establishing a mathematical model and a finite element model based on the collected data, and performing simulation and analog analysis to evaluate the stress and deformation of the circuit breaker porcelain bushing under explosion conditions; The anomaly detection and early warning subsystem is responsible for detecting abnormal situations and giving early warnings based on the analysis results; The report generation and presentation subsystem is responsible for generating reports and visualizing results based on the analysis results so that users can understand the analysis results and make corresponding decisions.

7. A circuit breaker porcelain bushing explosion characteristic analysis device, using the circuit breaker porcelain bushing explosion characteristic analysis method according to any one of claims 1 to 5, characterized in that: include: Data acquisition module, 3D modeling analysis module, data evaluation and analysis module; The data acquisition module is used to acquire scanning data, electrical performance data of each circuit breaker porcelain bushing fragment after the explosion, and electrical parameter test data, temperature data, and material performance data of the circuit breaker porcelain bushing; The three-dimensional modeling and analysis module is used to perform three-dimensional modeling and analysis based on the scanning data of each circuit breaker porcelain bushing fragment after the explosion to obtain crack data in the circuit breaker porcelain bushing; The data evaluation and analysis module is used to respectively read the crack data in the porcelain bushing of the circuit breaker, the electrical performance data of each porcelain bushing fragment of the circuit breaker, and the electrical parameter test data, temperature data, and material performance data of the porcelain bushing of the circuit breaker for analysis, and evaluate the degree of change of the material performance data of the porcelain bushing of the circuit breaker caused by the crack data and the degree of change of the electrical performance data of each porcelain bushing fragment of the circuit breaker after the explosion, as well as the electrical parameter test data and temperature data of the porcelain bushing of the circuit breaker according to the analysis results.

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