A circuit breaker-based opening and closing control method and system

Abstract

The present invention discloses a circuit breaker-based opening and closing control method and system, which relates to the technical field of circuit breakers. Python technology is used to construct a quadratic polynomial function, so as to accurately analyze the relationship between the expansion coefficient and the temperature. This process enables the influence of temperature changes on the deformation of the bimetallic strip in the circuit breaker to be fully grasped. Based on the power data set and the relationship between temperature and deformation obtained by analysis, the bending deformation of the bimetallic strip at different temperatures can be evaluated in real time. By setting a bending deformation threshold and comparing the bending deformation with the threshold, it can be determined whether the opening mechanism is triggered. After the opening mechanism is triggered, the deformation process of the bimetallic strip is traced back, and its upper limit temperature is analyzed and determined. Combined with the relevant material property change data, the thermal response time is calculated. This step can help determine whether the thermal response of the bimetallic strip in the circuit breaker is stable. For the case of unstable temperature, the temperature compensation mechanism is started to optimize the thermal response process.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a circuit breaker-based opening and closing control method and system. Background Art

[0002] As a key protection device in the power system, the circuit breaker is widely used in high and low voltage power transmission and distribution equipment. Its core function is to protect the power system from overload, short circuit and other faults by quickly cutting off or connecting the circuit. In the field of power system protection, the reliability and intelligence of the circuit breaker directly affect the safe operation of the system. Specifically, the opening and closing control mechanism in the circuit breaker is the core to ensure its normal operation, which senses the current load changes through heat. When current passes through the circuit breaker, the bimetallic strip expands or deforms due to the heat generated by the current, thereby triggering the opening of the circuit breaker.

[0003] The slow response speed of bimetallic strips in traditional circuit breakers is one of the key factors that lead to the decline in the efficiency of power protection devices. The main reason is that bimetallic strips usually rely on the heat accumulation process to sense overloads, but since heat accumulation takes time, it may be difficult to respond immediately to rapid changes in current or short-term surges. The delayed thermal response may miss the best protection opportunity, causing downstream equipment to withstand excessive current shocks and circuits to be exposed to abnormally high currents for a long time, which may cause serious consequences such as cable overheating, insulation damage and even fire. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a circuit breaker-based opening and closing control method and system, which solves the problems in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A circuit breaker opening and closing control method, comprising the following steps:

[0006] S1: Real-time monitoring of current load changes, temperature fluctuations and the characteristics of the bimetallic strips in the circuit breaker to generate relevant circuit status data, relevant environmental data and relevant material property change data. After preprocessing, the power data set is constructed, and the expansion coefficient of the bimetallic strips in the circuit breaker under different temperature conditions is detected using a thermal expansion instrument. , and combined with Python technology, analyze the expansion coefficient The relationship with temperature is used to construct a quadratic polynomial function;

[0007] S2: Based on the power data set and the quadratic polynomial function, the deformation of the bimetallic strip in the circuit breaker under different temperature conditions is analyzed in real time to generate the bending deformation Wbz, and the bending deformation threshold Wyz is set in combination with the relevant material property change data in the power data set. By comparing the bending deformation Wbz with the bending deformation threshold Wyz, it is determined whether the tripping mechanism is triggered;

[0008] S3: If the tripping mechanism is triggered, the entire process of the deformation of the bimetallic strip in the circuit breaker is traced back to determine the temperature of the bimetallic strip when the tripping mechanism is triggered, and record it as the upper limit temperature , based on the upper temperature limit , and combined with the relevant material property change data, analyze and calculate the thermal response time Rxyc;

[0009] S4: According to the value of the thermal response time Rxyc, the stability of the thermal response of the bimetallic strip in the current circuit breaker is judged again. If it is unstable, the temperature compensation mechanism is started.

[0010] Preferably, the specific steps of S1 include:

[0011] S11: Deploy current transformers at the power input and load ends in advance to monitor the current load changes in the circuit in real time, and obtain relevant circuit status data after summarizing. The relevant circuit status data includes the current changes in each time period and the heat transferred per unit time. ;

[0012] S12: pre-installing a temperature sensor around the bimetallic strip in the circuit breaker to monitor the temperature fluctuation state of the bimetallic strip in the circuit breaker in real time, and collecting the data to obtain relevant environmental data, wherein the relevant environmental data includes monitoring different temperature conditions of the bimetallic strip in the circuit breaker;

[0013] S13: By detecting the characteristics of the bimetallic strip in the circuit breaker and summarizing them, relevant material characteristic change data are obtained, wherein the relevant material characteristic change data includes the bending deformation of the bimetallic strip in the circuit breaker under different temperature conditions in the historical period. , Expansion coefficients of various types of metal sheets in bimetallic strips under different temperature conditions in historical periods , the force that triggers the opening of the gate , Young's modulus of bimetallic strip , the moment of inertia of the bimetallic strip , the quality of the bimetallic strip Specific heat capacity of bimetallic strip , the length of each type of metal strip in the bimetallic strip under different temperature conditions during the historical period and the initial length of each type of metal sheet ;

[0014] S14: Data preprocessing is performed on the relevant circuit state data, relevant environmental data, and relevant material property change data, respectively, to fill missing values ​​using the forward filling method, detect outliers using box plots, and correct outliers using the average value of adjacent data, remove duplicate data entries, and scale the data to The data are normalized within the range, and then the pre-processed data are aggregated to generate the power data set.

[0015] Preferably, the specific step S1 also includes:

[0016] S15: Use the thermal expansion meter to obtain the expansion coefficients of various types of metal sheets in the bimetallic strip under different temperature conditions during the historical period. After summarizing, relevant trend data is generated and uploaded to the power data set. Based on the relevant trend data and combined with Python technology, the expansion coefficient is analyzed. The relationship between the change of temperature and the change of the temperature is used to construct a quadratic polynomial function, and the expression of the quadratic polynomial function is as follows:

[0017]

[0018] In the formula, It represents the expansion coefficient of the i-th type metal sheet under the condition of temperature T; It represents the expansion coefficient of the i-th type metal sheet under standard temperature conditions; Indicates the temperature value; i indicates the number of the corresponding metal piece in the bimetallic strip; and Respectively represent the thermal expansion coefficient of the i-th type metal sheet Linear and quadratic rates of change with temperature.

[0019] Preferably, the specific steps of S2 include:

[0020] S21: Based on the relevant environmental data and relevant material property change data in the power data set, combined with the quadratic polynomial function, the deformation of the bimetallic strip in the circuit breaker under different temperature conditions is analyzed in real time, and after dimensionless processing, the bending deformation Wbz is generated. The bending deformation Wbz is obtained by the following formula:

[0021]

[0022] In the formula, Indicates the temperature Under the condition, the bending deformation of the bimetallic strip in the circuit breaker; Indicates the maximum temperature value; ; Indicates the temperature The expansion coefficient of the first type of metal sheet under the condition; Indicates the temperature The expansion coefficient of the second type of metal sheet under the condition; Indicates the temperature The length of the first type of metal sheet under the condition; Indicates the temperature Condition, the length of the second type of metal sheet;

[0023] Among them, according to , get the temperature change value , the temperature change value The way to obtain is: ,in, Indicates the initial temperature value.

[0024] Preferably, the specific step S2 also includes:

[0025] S22: According to the relevant material property change data in the power data set, the bending deformation threshold Wyz is set. The specific setting method is as follows:

[0026]

[0027] In the formula, represents the initial length of the first type of metal sheet; represents the initial length of the second type of metal sheet; Indicates the force that triggers the opening of the gate; represents the Young's modulus of the bimetallic strip; represents the moment of inertia of the bimetallic strip.

[0028] Preferably, the specific step S2 also includes:

[0029] S23: Based on the bending deformation amount Wbz and the bending deformation threshold Wyz obtained in S21 and S22, the bending deformation amount Wbz and the bending deformation threshold Wyz are compared to determine whether to trigger the tripping mechanism. The specific contents are as follows:

[0030] If the bending deformation Wbz exceeds the bending deformation threshold Wyz, the current needs to be disconnected to trigger the tripping mechanism;

[0031] If the bending deformation Wbz does not exceed the bending deformation threshold Wyz, there is no need to disconnect the current and the tripping mechanism will not be triggered temporarily.

[0032] Preferably, the specific steps of S3 include:

[0033] S31: Based on step S23, if the tripping mechanism is triggered, the temperature condition corresponding to the bending deformation amount Wbz exceeding the bending deformation threshold Wyz is determined and recorded as the upper limit temperature .

[0034] Preferably, the specific step S3 also includes:

[0035] S32: Based on upper temperature limit , and combined with the relevant material property change data and the relevant circuit state data, the thermal response time Rxyc is analyzed and calculated. The thermal response time Rxyc is obtained by the following formula:

[0036]

[0037] In the formula, Indicates time, represents the rate of change of temperature with respect to time, It represents the amount of heat transferred per unit time. Indicates the mass of the bimetallic strip, represents the specific heat capacity of the bimetallic strip, represents heat capacity;

[0038] S33: The thermal response time Rxyc is calculated by analyzing the integrated temperature change step by step. The thermal response time Rxyc is obtained according to the following formula:

[0039]

[0040] In the formula, Indicates the temperature change value, Indicates the amount of heat transferred during a temperature change.

[0041] Preferably, the specific steps of S4 include:

[0042] S41: presetting a safety time W, and comparing and analyzing the safety time W with the thermal response time Rxyc, to determine again the stability of the thermal response of the bimetallic strip in the current circuit breaker, the specific determination contents are as follows:

[0043] If the thermal response time Rxyc exceeds the safety time W, it is determined again that the thermal response of the bimetallic strip in the current circuit breaker is in an unstable state, and the temperature compensation mechanism is activated at this time;

[0044] If the thermal response time Rxyc does not exceed the safety time W, it is determined again that the thermal response of the bimetallic strip in the current circuit breaker is in a stable state, and the temperature compensation mechanism will not be started at this time;

[0045] S42: When the temperature compensation mechanism is activated, the safety time W is substituted into the formula involved in step S33 to obtain the temperature change value under the safety time W. , and combined with the initial temperature value , calculate the maximum temperature value under the safety time W , based on the maximum temperature value under the safety time W And the maximum temperature value in S21 , obtain the temperature difference Wc, the temperature difference Wc is obtained by the following method:

[0046] S43: Based on the temperature difference Wc, dynamically compensate the temperature condition in the next tripping mechanism triggering process to obtain a dynamic compensation factor Dbyz. The specific compensation content will be displayed through the dynamic compensation factor Dbyz:

[0047]

[0048] In the formula, Refers to the average expansion coefficient of the bimetallic strip at temperature T; Refers to the dynamic compensation factor under the condition of temperature T, which means the temperature compensation of the bimetallic strip under the condition of temperature T.

[0049] A circuit breaker-based opening and closing control system, comprising a monitoring module, an experimental fitting module, a mechanism triggering module, a thermal response module and a compensation module;

[0050] The monitoring module is used to monitor the current load change, temperature fluctuation state and characteristics of the bimetallic strip in the circuit breaker in real time to generate relevant circuit state data, relevant environmental data and relevant material characteristic change data, and after preprocessing, construct an electric power data set;

[0051] The experimental fitting module uses a thermal expansion instrument to detect the expansion coefficient of the bimetallic strip in the circuit breaker under different temperature conditions. , and combined with Python technology, analyze the expansion coefficient The relationship with temperature is used to construct a quadratic polynomial function;

[0052] The mechanism trigger module will analyze the deformation of the bimetallic strip in the circuit breaker under different temperature conditions in real time based on the power data set and the quadratic polynomial function to generate the bending deformation amount Wbz, and set the bending deformation threshold Wyz in combination with the relevant material property change data in the power data set. By comparing the bending deformation amount Wbz with the bending deformation threshold Wyz, it is determined whether to trigger the tripping mechanism;

[0053] The thermal response module will receive the tripping mechanism and trace back the entire process of the deformation of the bimetallic strip in the circuit breaker to determine the temperature of the bimetallic strip when the tripping mechanism is triggered, and record it as the upper limit temperature. , based on the upper temperature limit , and combined with the relevant material property change data, analyze and calculate the thermal response time Rxyc;

[0054] The compensation module determines again the stability of the thermal response of the bimetallic strip in the current circuit breaker according to the value of the thermal response time Rxyc, and starts the temperature compensation mechanism if it is unstable.

[0055] The present invention provides a circuit breaker opening and closing control method and system, which has the following beneficial effects:

[0056] (1) This method can accurately grasp the circuit state by real-time monitoring of current load, temperature fluctuations, and changes in the material properties of the bimetallic strip in the circuit breaker. The expansion coefficient Px of the bimetallic strip at different temperatures is detected by combining a thermal expansion meter, and a quadratic polynomial function is constructed through Python technology, which can dynamically analyze the relationship between the expansion coefficient and temperature changes. This high-precision data acquisition and analysis method enables the circuit breaker to more accurately judge the circuit state changes, thereby triggering the tripping operation in time when the circuit is overloaded or the temperature is abnormal. Enhance the reliability of circuit protection: By establishing a power data set and analyzing the deformation of the bimetallic strip under different temperature conditions, this method provides a real-time judgment mechanism based on bending deformation and threshold. The tripping mechanism is triggered only when the bending deformation exceeds the set threshold, which effectively avoids false operations caused by instantaneous current fluctuations and ensures that the circuit breaker can only cut off the circuit under real overload conditions, thereby improving the reliability and stability of circuit protection. Optimize the control of thermal response time: After the tripping mechanism is triggered, this method back-analyzes the deformation process of the bimetallic strip to determine its upper temperature limit and further calculates the thermal response time. Based on this data, it can be judged whether the thermal response of the bimetallic strip in the current circuit breaker is stable. If the thermal response is unstable, the system will automatically start the temperature compensation mechanism and further adjust the system working parameters to ensure that the temperature response of the circuit breaker is always within the controllable range, further reducing the phenomenon of the circuit breaker not working in time due to the time required for heat accumulation; the temperature compensation mechanism can be adjusted according to the real-time changing temperature data, which helps to reduce the impact of temperature fluctuations on the circuit breaker material, thereby extending the service life of the equipment, improving its reliability, and ensuring that the circuit breaker can maintain stable operation under different working conditions. This adaptive adjustment further improves the intelligence and adaptability of the circuit breaker system in a complex power environment. In short, this method monitors and dynamically adjusts the working state of the circuit breaker in real time through multivariate data analysis and intelligent control mechanism, realizes more accurate and reliable overload protection, and effectively avoids the negative impact of temperature fluctuations on the performance of the circuit breaker. Through temperature compensation, dynamic optimization of the thermal response time is performed for subsequent opening operations, which further improves the protection performance of the circuit breaker and enhances the system's adaptive and intelligent control capabilities, thereby effectively ensuring the safety and stability of the power system.

[0057] (2) By using a thermal expansion meter to collect the expansion coefficients of various types of metal sheets in the bimetallic strips under different temperature conditions during the historical period, it is possible to generate expansion coefficient trend data with high accuracy. These data provide a reliable basis for subsequent analysis and can accurately reflect the thermal expansion behavior of the bimetallic strips under different temperature environments. Furthermore, by combining Python technology, the relationship between the expansion coefficient and temperature change is analyzed, and a quadratic polynomial function suitable for this scheme is constructed, thereby realizing the accurate modeling of the nonlinear relationship between the expansion coefficient and temperature. This model provides a scientific basis for the temperature response, deformation prediction and fault diagnosis of the system. Quantification of bimetallic material properties: Using the collected historical data and combining the linear change rate and square change rate calculated by the curve fitting method, the law of thermal expansion coefficient changes of different types of metal sheets in the bimetallic strips with temperature can be accurately quantified, which makes the material properties of the bimetallic strips quantified and can provide more specific data support for the precise regulation of circuit protection mechanisms and opening and closing mechanisms. Through this quantitative method, the response of the bimetallic strips under different working environments can be effectively predicted, thereby optimizing the control strategy and thermal response mechanism of the circuit breaker.

[0058] (3) Based on the temperature condition corresponding to when the bending deformation exceeds the threshold, the upper limit temperature of the bimetallic strip in the circuit breaker is determined. The determination of this upper limit temperature provides a scientific basis for further analysis of the thermal response time, ensures the dynamic correlation between temperature changes and circuit breaker performance, and provides a basis for subsequent judgment of the thermal response time. By using the upper limit temperature, relevant material property change data and circuit status data, combined with the thermal response time formula, the thermal response time of the bimetallic strip can be accurately calculated. Dynamic analysis of temperature-time: By gradually integrating the temperature change and performing dynamic derivation analysis of temperature-heat, the accuracy of the thermal response time calculation is ensured. This step-by-step derivation method takes into account the impact of temperature changes on thermal response in different time periods, and provides dynamic and real-time reference data for subsequent control decisions, preventing the circuit breaker from opening in time due to slow temperature changes. By accurately calculating the thermal response time, it is possible to more accurately judge whether the thermal response of the bimetallic strip in the circuit breaker is stable. During operation, this accurate thermal response analysis can ensure that the circuit breaker responds quickly when needed, thereby improving the reliability and stability of the protection system. Optimize the working stability of the circuit breaker: Accurate calculation of the thermal response time helps to determine whether the circuit breaker is in a stable thermal response state, and further optimize the protection mechanism of the circuit breaker. If the thermal response is unstable, the temperature compensation mechanism can be activated in time to avoid failure due to slow temperature, thereby improving the stability and durability of the circuit breaker in different environments.

[0059] (4) After the temperature compensation mechanism is started, by substituting the safety time into the calculation formula, the maximum temperature value under the safety time W can be obtained, so that the temperature difference between this value and the maximum temperature value in S21 can be used to further accurately calculate the impact of temperature changes on the system. This temperature difference analysis can effectively predict future temperature changes and optimize the compensation process to ensure that the circuit breaker can respond more accurately to different environmental changes. Real-time adjustment of dynamic compensation factor: Based on the calculation of temperature difference, the dynamic compensation factor can adjust the temperature compensation process of the circuit breaker in real time to ensure that the expansion coefficient of the bimetallic strip is properly corrected when the temperature fluctuates. The dynamic compensation factor takes into account the impact of temperature changes on the thermal response time, thereby accurately adjusting the response time of the device, so that the device can maintain stable performance under different temperature conditions and prevent protection failure caused by temperature fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 A schematic flow chart of a method for controlling the opening and closing of a circuit breaker according to the present invention;

[0061] Figure 2 The present invention is a block diagram of a circuit breaker-based opening and closing control system. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] Example 1

[0064] See also Figure 1 The present invention provides a circuit breaker opening and closing control method, comprising the following steps:

[0065] S1: Real-time monitoring of current load changes, temperature fluctuations and the characteristics of the bimetallic strips in the circuit breaker to generate relevant circuit status data, relevant environmental data and relevant material property change data. After preprocessing, the power data set is constructed, and the expansion coefficient of the bimetallic strips in the circuit breaker under different temperature conditions is detected using a thermal expansion instrument. , and combined with Python technology, analyze the expansion coefficient The relationship with temperature is used to construct a quadratic polynomial function;

[0066] S2: Based on the power data set and the quadratic polynomial function, the deformation of the bimetallic strip in the circuit breaker under different temperature conditions is analyzed in real time to generate the bending deformation Wbz, and the bending deformation threshold Wyz is set in combination with the relevant material property change data in the power data set. By comparing the bending deformation Wbz with the bending deformation threshold Wyz, it is determined whether the tripping mechanism is triggered;

[0067] S3: If the tripping mechanism is triggered, the entire process of the deformation of the bimetallic strip in the circuit breaker is traced back to determine the temperature of the bimetallic strip when the tripping mechanism is triggered, and record it as the upper limit temperature , based on the upper temperature limit , and combined with the relevant material property change data, analyze and calculate the thermal response time Rxyc;

[0068] S4: According to the value of the thermal response time Rxyc, the stability of the thermal response of the bimetallic strip in the current circuit breaker is judged again. If it is unstable, the temperature compensation mechanism is started.

[0069] In this embodiment, the method can comprehensively and accurately capture the changes in the circuit by real-time monitoring of the current load, temperature fluctuation state and the characteristics of the bimetallic strip in the circuit breaker, and generate a power data set based on the real-time collected data. The expansion coefficient of the bimetallic strip is detected by combining a thermal expansion meter, and a quadratic polynomial function is constructed using Python technology to accurately analyze the relationship between the expansion coefficient and temperature. This process enables the influence of temperature changes on the deformation of the bimetallic strip in the circuit breaker to be fully grasped, further improving the response accuracy and stability of the circuit breaker. Based on the power data set and the relationship between temperature and deformation obtained by analysis, the bending deformation of the bimetallic strip at different temperatures can be evaluated in real time. By setting a bending deformation threshold and comparing the bending deformation with the threshold, it can be determined whether the tripping mechanism is triggered. This intelligent judgment mechanism can not only avoid false operations, but also improve the triggering sensitivity of the circuit breaker, ensuring the reliability and safety of the circuit. After the tripping mechanism is triggered, the deformation process of the bimetallic strip is traced back, its upper temperature limit is analyzed and determined, and the thermal response time is further calculated in combination with the relevant material property change data. This step can help determine whether the thermal response of the bimetallic strip in the circuit breaker is stable and avoid false operation caused by temperature fluctuations. In the case of unstable temperature, the temperature compensation mechanism is activated to optimize the thermal response process and enhance the reliability and anti-interference ability of the circuit breaker. In the case of unstable thermal response, the temperature compensation mechanism is activated to ensure the stability of the bimetallic strip by compensating for the impact of temperature changes on the thermal response of the bimetallic strip. This mechanism effectively avoids unstable disconnection of the circuit breaker caused by changes in the external environment or sudden current changes, and ensures the continuous and stable operation of the power system.

[0070] Example 2

[0071] Please refer to Figure 1, specifically: S1 specific steps include:

[0072] S11: Deploy current transformers at the power input end (incoming line side) and the load end (outgoing line side) in advance to monitor the current load changes in the circuit in real time, and obtain relevant circuit status data after summarizing. The relevant circuit status data includes the current changes in each time period and the heat transferred per unit time. ; Among them, the heat transferred per unit time It can be monitored and obtained through heat flow sensor or temperature sensor;

[0073] Among them, the current transformer (CT) is installed on the incoming line side of the power input end, that is, before the power flows into the circuit breaker. The purpose is to monitor the total current entering the circuit breaker. It can track the load conditions in the circuit in real time to indirectly reflect the temperature conditions. The current sensor is installed on the outgoing line side of the circuit breaker, that is, the part connected to the load. The purpose is to monitor the current conditions of the circuit from the circuit breaker to the load.

[0074] S12: pre-installing a temperature sensor around the bimetallic strip in the circuit breaker to monitor the temperature fluctuation state of the bimetallic strip in the circuit breaker in real time, and collecting the data to obtain relevant environmental data, wherein the relevant environmental data includes monitoring different temperature conditions of the bimetallic strip in the circuit breaker;

[0075] S13: By detecting the characteristics of the bimetallic strip in the circuit breaker and summarizing them, relevant material characteristic change data are obtained, wherein the relevant material characteristic change data includes the bending deformation of the bimetallic strip in the circuit breaker under different temperature conditions in the historical period. , Expansion coefficients of various types of metal sheets in bimetallic strips under different temperature conditions in historical periods , the force that triggers the opening of the gate , Young's modulus of bimetallic strip , the moment of inertia of the bimetallic strip , the quality of the bimetallic strip Specific heat capacity of bimetallic strip , the length of each type of metal strip in the bimetallic strip under different temperature conditions during the historical period and the initial length of each type of metal sheet ;

[0076] S14: Data preprocessing is performed on the relevant circuit state data, relevant environmental data, and relevant material property change data, respectively, to fill missing values ​​using the forward filling method, detect outliers using box plots, and correct outliers using the average value of adjacent data, remove duplicate data entries, and scale the data to The data are normalized within the range, and then the pre-processed data are aggregated to generate the power data set.

[0077] Among them, the bimetallic strip in the circuit breaker is a thermal element in the circuit breaker;

[0078] In this embodiment, real-time current monitoring and protection: by installing current sensors at the power input end (incoming side) and the load end (outgoing side) respectively, real-time monitoring of current load changes in the circuit can be achieved. This layout can help comprehensively monitor the current situation of the circuit and timely reflect the temperature situation indirectly through circuit changes. The purpose is to facilitate the observation of background personnel and real-time understanding of the situation in the power system. Comprehensive environmental monitoring and thermal response control: temperature sensors are installed around the bimetallic strip in the circuit breaker to monitor the temperature fluctuation state of the bimetallic strip in real time, so that the temperature data can accurately reflect the working environment in the circuit breaker. By summarizing and analyzing these temperature data, the changes under different temperature conditions can be effectively obtained, thereby providing a key basis for the subsequent material deformation and the start-up of the temperature compensation mechanism. This not only helps to optimize the thermal response process of the circuit breaker, but also avoids misoperation caused by temperature fluctuations, ensuring the safe operation of the system under high load or fault conditions. Multi-dimensional data analysis and accurate evaluation of material properties: By comprehensively testing the characteristics of the bimetallic strips in the circuit breaker, the data on changes in relevant material properties can be obtained. These data include information on bending deformation, expansion coefficient at different temperatures, triggering tripping force, Young's modulus and moment of inertia. Through the comprehensive analysis of these material properties, the response behavior of the bimetallic strips under different temperatures and current loads can be accurately evaluated, providing a more scientific and accurate basis for the protection mechanism of the circuit breaker, and further improving the reliability and stability of the system. Improved accuracy of data preprocessing and model building: Data preprocessing techniques such as forward filling method to fill missing values, box plot detection of outliers, data scaling and normalization processing are used to ensure that all collected data are complete, valid and consistent during analysis. By removing duplicate data and correcting outliers, the data quality is greatly improved, providing an accurate basis for subsequent model construction and analysis. The processed data is finally constructed into a power data set, providing reliable data support for the tripping control strategy, temperature compensation mechanism and thermal response stability analysis.

[0079] Example 3

[0080] Please refer to Figure 1 Specifically: S1 includes the following steps:

[0081] S15: Use the thermal expansion meter to obtain the expansion coefficients of various types of metal sheets in the bimetallic strip under different temperature conditions during the historical period. After summarizing, relevant trend data is generated and uploaded to the power data set. Based on the relevant trend data and combined with Python technology, the expansion coefficient is analyzed. The relationship between the change of temperature and the change of the temperature is used to construct a quadratic polynomial function, and the expression of the quadratic polynomial function is as follows:

[0082]

[0083] In the formula, It represents the expansion coefficient of the i-th type metal sheet under the condition of temperature T; It represents the expansion coefficient of the i-th type metal sheet under standard temperature conditions; represents the temperature value; i represents the number of the corresponding metal sheet in the bimetallic strip. In this case, the maximum number of i is 2, because there are two types of metal sheets in the bimetallic strip; and Respectively represent the thermal expansion coefficient of the i-th type metal sheet The linear and quadratic rates of change with temperature are the linear and quadratic coefficients of temperature change; where, and The value is obtained by accumulating a large amount of data collected by thermal expansion instruments over a historical period and solving it using curve fitting methods (such as the least squares method).

[0084] Among them, the relevant trend data includes the expansion coefficients of various types of metal sheets in the bimetallic strip under different temperature conditions in the historical period. ;

[0085] Expansion coefficient of type i metal sheet under standard temperature conditions It refers to the expansion coefficient of a metal material measured at a specific standard temperature (usually 25°C or other recognized standard temperature conditions). It reflects the degree of change in length or volume caused by a unit temperature change when the temperature of the metal material changes.

[0086] For bimetallic strips, different types of metal strips refer to the two different metal materials that make up the bimetallic strip. The expansion coefficient, stiffness, thermal conductivity and other physical properties of each metal may be different, so the two will produce different expansion amounts when heated. This difference causes the bimetallic strip to bend and deform, thereby triggering the circuit protection mechanism. The common bimetallic strip structure is welded by two metal strips. The usual combination includes: metal type one (metal with a high expansion coefficient), such as aluminum, copper and other metals. These metals have a higher expansion coefficient, that is, they will expand more under the same temperature change; metal type two (metal with a low expansion coefficient), such as steel, stainless steel and other metals, whose expansion coefficient is lower, that is, they expand less under the same temperature change.

[0087] When the bimetallic strip is heated, the two metals expand differently due to their different coefficients of expansion. The metal with the larger coefficient of expansion expands more relative to the metal with the smaller coefficient of expansion, causing the bimetallic strip to bend. This bending action is the key to using temperature changes to trigger the circuit protection function.

[0088] In this embodiment, the expansion characteristics of the metal sheet are accurately measured and modeled: by using a thermal expansion meter to obtain the expansion coefficients of various types of metal sheets in the bimetallic sheet under different temperature conditions in the historical period, and generating relevant trend data, an accurate experimental data basis is provided for the temperature response characteristics of the bimetallic sheet. This process ensures that the measurement of the expansion coefficient covers different temperature ranges and can more comprehensively reflect the thermal response conditions that the metal sheet may encounter in actual use. Through these data, a quadratic polynomial function between temperature and expansion coefficient is constructed, which provides a scientific basis for the temperature control and thermal response of the circuit breaker, and can more accurately predict and analyze the deformation behavior of the circuit breaker under different temperature conditions. Accurately analyze the impact of temperature change on the expansion coefficient: Python technology is used to analyze the relationship between the expansion coefficient and temperature change. The constructed quadratic polynomial function can reveal the linear and quadratic effects of temperature change on the expansion coefficient of the metal sheet. The analysis process uses a curve fitting method (such as the least squares method) to fit the historical data, so that the mathematical model of the expansion coefficient changing with temperature is more accurate. This data fitting-based method can effectively reduce experimental errors and model deviations, and ensure that the prediction of the expansion coefficient has high accuracy and reliability. Improve the accuracy of temperature response prediction: By establishing a quadratic polynomial function of temperature and expansion coefficient, the circuit breaker can more accurately predict the expansion response of the bimetallic strip. When the system obtains temperature change data in real time, based on the established mathematical model, the expansion coefficient of the bimetallic strip can be immediately calculated, and the deformation of the circuit breaker can be further inferred. This technology can further improve the accuracy of temperature response prediction, avoid false operation or untimely protection caused by inaccurate temperature fluctuations or calculation deviations, and effectively improve the reliability of the circuit breaker. The accumulation and analysis process of historical data enables the protection mechanism of the circuit breaker to dynamically adapt to temperature changes in different time periods and environments, and improves the adaptability of the circuit breaker to environmental changes. In this way, the circuit breaker can always maintain relatively good protection performance under the influence of different seasons, ambient temperatures or other external factors, thereby improving the safety of the overall power system. Enhance data-driven intelligent control capabilities: By expressing the relationship between temperature and expansion coefficient in the form of mathematical formulas and integrating them into the power data set, the circuit breaker can be intelligently controlled in a data-driven manner. The trend data in the power data set combined with real-time temperature monitoring information can make the circuit breaker's opening and closing control more accurate and intelligent, avoiding the over-reliance on experience or manual settings that may occur in traditional methods. This intelligent data analysis method not only improves the circuit breaker's response speed, but also enhances its adaptability in various complex electrical environments.

[0089] Example 4

[0090] Please refer to Figure 1 , specifically: S2 specific steps include:

[0091] S21: Based on the relevant environmental data and relevant material property change data in the power data set, combined with the quadratic polynomial function, the deformation of the bimetallic strip in the circuit breaker under different temperature conditions is analyzed in real time, and after dimensionless processing, the bending deformation Wbz is generated. The bending deformation Wbz is obtained by the following formula:

[0092]

[0093] In the formula, Indicates the temperature Under the condition, the bending deformation of the bimetallic strip in the circuit breaker; Indicates the maximum temperature value; ; Indicates the temperature The expansion coefficient of the first type of metal sheet under the condition; Indicates the temperature The expansion coefficient of the second type of metal sheet under the condition; Indicates the temperature The length of the first type of metal sheet under the condition; Indicates the temperature Condition, the length of the second type of metal sheet;

[0094] Among them, according to , get the temperature change value , the temperature change value The way to obtain is: ,in, Indicates the initial temperature value.

[0095] The specific steps of S2 also include:

[0096] S22: According to the relevant material property change data in the power data set, the bending deformation threshold Wyz is set. The specific setting method is as follows:

[0097]

[0098] In the formula, represents the initial length of the first type of metal sheet; represents the initial length of the second type of metal sheet; Indicates the force that triggers the opening of the gate, that is, the trigger force of the trigger switch; represents the Young's modulus (material stiffness) of the bimetallic strip; It represents the moment of inertia of the bimetallic strip, reflecting its ability to resist bending.

[0099] The initial length of each type of metal sheet mentioned above It can be monitored and acquired through laser displacement sensors or optical sensors;

[0100] Young's modulus of bimetallic strip It can be monitored and acquired through strain gauge sensors or ultrasonic sensors;

[0101] The moment of inertia of the bimetallic strip It can be monitored and acquired through acceleration sensors or vibration sensors;

[0102] The force that triggers the opening of the gate, that is, the trigger force of the trigger switch It can be monitored and acquired through force sensors;

[0103] The specific steps of S2 also include:

[0104] S23: Based on the bending deformation amount Wbz and the bending deformation threshold Wyz obtained in S21 and S22, the bending deformation amount Wbz and the bending deformation threshold Wyz are compared to determine whether to trigger the tripping mechanism. The specific contents are as follows:

[0105] If the bending deformation Wbz exceeds the bending deformation threshold Wyz, the current needs to be disconnected to trigger the tripping mechanism;

[0106] If the bending deformation Wbz does not exceed the bending deformation threshold Wyz, there is no need to disconnect the current and the tripping mechanism will not be triggered temporarily.

[0107] In this embodiment, by combining the relevant environmental data, material property change data and quadratic polynomial function in the power data set, the deformation of the bimetallic strip in the circuit breaker under different temperature conditions can be analyzed in real time. The generated bending deformation is obtained based on dimensionless processing. This method can accurately reflect the bending condition of the bimetallic strip when it is affected by temperature changes. Through this high-precision deformation calculation, the system can dynamically monitor the deformation state of the bimetallic strip and provide real-time feedback for the protection mechanism of the circuit breaker. In step S22, the setting of the bending deformation threshold not only depends on the physical properties of the material (such as Young's modulus and moment of inertia), but also takes into account the length of the metal sheet and the triggering force required to trigger the switch, which makes the setting of the bending deformation threshold more scientific and accurate, and can better reflect the physical state of the circuit breaker under different working conditions. Based on the comparison of the bending deformation and the bending deformation threshold, the system can quickly determine whether it is necessary to trigger the tripping mechanism. When the bending deformation exceeds the threshold, the circuit breaker can disconnect the current in time to prevent further damage to the circuit. If the bending deformation does not reach the threshold, the system will not trigger the tripping temporarily to avoid unnecessary power outages. This intelligent judgment mechanism based on actual deformation and set thresholds can ensure that the circuit breaker acts on demand and improve the accuracy and response speed of the protection system.

[0108] Example 5

[0109] Please refer to Figure 1 , specifically: S3 specific steps include:

[0110] S31: Based on step S23, if the tripping mechanism is triggered, the temperature condition corresponding to the bending deformation amount Wbz exceeding the bending deformation threshold Wyz is determined and recorded as the upper limit temperature .

[0111] The specific steps of S3 also include:

[0112] S32: Based on upper temperature limit , and combined with the relevant material property change data and the relevant circuit state data, the thermal response time Rxyc is analyzed and calculated. The thermal response time Rxyc is obtained by the following formula:

[0113]

[0114] In the formula, Indicates time, represents the rate of change of temperature with respect to time, It represents the amount of heat transferred per unit time. Indicates the mass of the bimetallic strip, It represents the specific heat capacity of the bimetallic strip, that is, the heat required to raise the unit mass of an object by 1 degree Celsius. Indicates heat capacity; the upper limit temperature at this point Refers to the maximum temperature value in S21 , used for step-by-step derivation of S33.

[0115] The quality of the bimetallic strip It can be obtained through mass sensors or load cells;

[0116] Specific heat capacity of bimetallic strip It can be obtained by differential scanning calorimetry (DSC) or temperature sensor;

[0117] S33: The thermal response time Rxyc is calculated by analyzing the integrated temperature change step by step. The thermal response time Rxyc is obtained according to the following formula:

[0118]

[0119] In the formula, Indicates the temperature change value, Indicates the amount of heat transferred during a temperature change.

[0120] The specific derivation process of the integrated temperature change in S33 for step-by-step derivation is as follows:

[0121] 1. Initial equation: Start with the following differential form:

[0122]

[0123] 2. Separate variables: Separate the variables in the equation Separating t, the equation can be rewritten as:

[0124]

[0125] in, is temperature, t is time;

[0126] 3. Integrate both ends: Integrate both sides:

[0127]

[0128] 4. Calculate the integral result:

[0129] The integral on the left is:

[0130] The integral on the right is:

[0131] Therefore, the integral result is:

[0132] 5. Solve the duration, that is, the thermal response duration Rxyc:

[0133]

[0134] Here Rxyc represents the thermal response time.

[0135] In this embodiment, based on the comparison between the bending deformation amount and the bending deformation threshold, the upper limit temperature when the deformation of the bimetal strip in the circuit breaker exceeds the threshold under temperature conditions can be accurately determined. This upper limit temperature reflects the critical point of the bimetal strip under temperature change, marking the key relationship between temperature and deformation. By extracting this temperature value, reliable input data can be provided for the subsequent calculation of the thermal response time, ensuring the efficient operation of the entire opening and closing control system. Accurate calculation of thermal response time: After determining the upper limit temperature, by combining the relevant material property change data and circuit state data, the thermal response time of the bimetal strip can be accurately calculated. This time duration reflects the response speed of the bimetal strip to temperature changes, and can quantify the effect of temperature on the thermal expansion of the material and its actual effect on the performance of the circuit breaker. Through a comprehensive analysis of factors such as the temperature change rate, the heat transferred, the mass of the bimetal strip, and the specific heat capacity, a scientific basis can be provided for the accurate triggering of the opening mechanism to avoid equipment failures caused by slow thermal response. Optimize thermal response time prediction and control: Based on the calculation results of the thermal response time, the system can accurately predict the temperature response process of the circuit breaker during operation, and then provide more precise control for the triggering of the tripping mechanism. This optimized control strategy can determine whether the equipment needs to be protected based on the specific thermal response time, avoid too late tripping action, and thus improve the reliability and stability of the circuit system. Efficient thermal management and fine control: Through detailed analysis of temperature change values ​​and the amount of heat transferred per unit time, the system can achieve efficient thermal management. This process integrates the temperature change and gradually derives the change in thermal response time, further finely managing the impact of temperature on the bimetallic strip.

[0136] Example 6

[0137] Please refer to Figure 1 , specifically: S4 specific steps include:

[0138] S41: presetting a safety time W, and comparing and analyzing the safety time W with the thermal response time Rxyc, to determine again the stability of the thermal response of the bimetallic strip in the current circuit breaker, the specific determination contents are as follows:

[0139] If the thermal response time Rxyc exceeds the safety time W, it is determined again that the thermal response of the bimetallic strip in the current circuit breaker is in an unstable state, and the temperature compensation mechanism is activated at this time;

[0140] If the thermal response time Rxyc does not exceed the safety time W, it is determined again that the thermal response of the bimetallic strip in the current circuit breaker is in a stable state, and the temperature compensation mechanism will not be started at this time;

[0141] S42: When the temperature compensation mechanism is activated, the safety time W is substituted into the formula involved in step S33 to obtain the temperature change value under the safety time W. , and combined with the initial temperature value , calculate the maximum temperature value under the safety time W , based on the maximum temperature value under the safety time W And the maximum temperature value in S21 , obtain the temperature difference Wc, the temperature difference Wc is obtained by the following method:

[0142] S43: Based on the temperature difference Wc, dynamically compensate the temperature condition in the next tripping mechanism triggering process to obtain a dynamic compensation factor Dbyz. The specific compensation content will be displayed through the dynamic compensation factor Dbyz:

[0143]

[0144] In the formula, Refers to the average expansion coefficient of the bimetallic strip under the condition of temperature T, which indicates the degree of influence of temperature change on thermal response time; Refers to the dynamic compensation factor under the condition of temperature T, which means the temperature compensation of the bimetallic strip under the condition of temperature T.

[0145] In this embodiment, the judgment of thermal response stability is strengthened: by comparing and analyzing the thermal response time with the safety time W, the thermal response stability of the bimetallic strip in the circuit breaker can be further judged. This step ensures the stable operation of the equipment under different temperature environments. Once it is detected that the thermal response time exceeds the safety threshold, the temperature compensation mechanism is started in time to avoid equipment failure or misoperation due to unstable thermal response; automatic start of the temperature compensation mechanism: based on the results of the comparison and analysis, if the thermal response time exceeds the preset safety time, the temperature compensation mechanism is automatically started. This mechanism ensures that the temperature control performance of the circuit breaker will not delay the implementation of the tripping mechanism due to slow response through compensation and adjustment of temperature changes, thereby protecting the circuit breaker from the adverse effects of temperature changes and further improving the stability and safety of the system. Accurately calculate the temperature difference and optimize the temperature control process: When the temperature compensation mechanism is started, the maximum temperature value under the safety time W can be obtained by substituting the safety time into the calculation formula, so that the temperature difference between this value and the maximum temperature value in S21 can be used to further accurately calculate the impact of temperature changes on the system. This temperature difference analysis can effectively predict future temperature changes and optimize the compensation process to ensure that the circuit breaker can respond more accurately to different environmental changes. Real-time adjustment of dynamic compensation factor: Based on the calculation of temperature difference, the dynamic compensation factor can adjust the temperature compensation process of the circuit breaker in real time to ensure that the expansion coefficient of the bimetallic strip is properly corrected when the temperature fluctuates. The dynamic compensation factor takes into account the impact of temperature changes on the thermal response time, thereby accurately adjusting the response time of the device, so that the device can maintain stable performance under different temperature conditions and prevent protection failure caused by temperature fluctuations.

[0146] Example 7

[0147] Please refer to Figure 2 ,Specifically: A circuit breaker-based opening and closing control system, including a monitoring module, an experimental fitting module, a mechanism triggering module, a thermal response module and a compensation module;

[0148] The monitoring module is used to monitor the current load change, temperature fluctuation state and characteristics of the bimetallic strip in the circuit breaker in real time to generate relevant circuit state data, relevant environmental data and relevant material characteristic change data, and after preprocessing, construct an electric power data set;

[0149] The experimental fitting module uses a thermal expansion instrument to detect the expansion coefficient of the bimetallic strip in the circuit breaker under different temperature conditions. , and combined with Python technology, analyze the expansion coefficient The relationship with temperature is used to construct a quadratic polynomial function;

[0150] The mechanism trigger module will analyze the deformation of the bimetallic strip in the circuit breaker under different temperature conditions in real time based on the power data set and the quadratic polynomial function to generate the bending deformation amount Wbz, and set the bending deformation threshold Wyz in combination with the relevant material property change data in the power data set. By comparing the bending deformation amount Wbz with the bending deformation threshold Wyz, it is determined whether to trigger the tripping mechanism;

[0151] The thermal response module will receive the tripping mechanism and trace back the entire process of the deformation of the bimetallic strip in the circuit breaker to determine the temperature of the bimetallic strip when the tripping mechanism is triggered, and record it as the upper limit temperature. , based on the upper temperature limit , and combined with the relevant material property change data, analyze and calculate the thermal response time Rxyc;

[0152] The compensation module determines again the stability of the thermal response of the bimetallic strip in the current circuit breaker according to the value of the thermal response time Rxyc, and starts the temperature compensation mechanism if it is unstable.

[0153] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit breaker opening and closing control method, characterized in that: The following steps are included: S1: Real-time monitoring of current load changes, temperature fluctuations and the characteristics of the bimetallic strips in the circuit breaker to generate relevant circuit status data, relevant environmental data and relevant material property change data. After preprocessing, the power data set is constructed, and the expansion coefficient of the bimetallic strips in the circuit breaker under different temperature conditions is detected using a thermal expansion instrument. , and combined with Python technology, analyze the expansion coefficient The relationship with temperature is used to construct a quadratic polynomial function; S2: Based on the power data set and the quadratic polynomial function, the deformation of the bimetallic strip in the circuit breaker under different temperature conditions is analyzed in real time to generate the bending deformation Wbz, and the bending deformation threshold Wyz is set in combination with the relevant material property change data in the power data set. By comparing the bending deformation Wbz with the bending deformation threshold Wyz, it is determined whether the tripping mechanism is triggered; The specific steps of S2 include: S21: Based on the relevant environmental data and relevant material property change data in the power data set, combined with the quadratic polynomial function, the deformation of the bimetallic strip in the circuit breaker under different temperature conditions is analyzed in real time, and after dimensionless processing, the bending deformation Wbz is generated. The bending deformation Wbz is obtained by the following formula: ； In the formula, Indicates the temperature Under the condition, the bending deformation of the bimetallic strip in the circuit breaker; Indicates the maximum temperature value; ; Indicates the temperature The expansion coefficient of the first type of metal sheet under the condition; Indicates the temperature The expansion coefficient of the second type of metal sheet under the condition; Indicates the temperature The length of the first type of metal sheet under the condition; Indicates the temperature Condition, the length of the second type of metal sheet; Among them, according to , get the temperature change value , the temperature change value The way to obtain is: ,in, Indicates the initial temperature value; S3: If the tripping mechanism is triggered, the entire process of the deformation of the bimetallic strip in the circuit breaker is traced back to determine the temperature of the bimetallic strip when the tripping mechanism is triggered, and record it as the upper limit temperature , based on the upper temperature limit , and combined with the relevant material property change data, analyze and calculate the thermal response time Rxyc; S4: According to the value of the thermal response time Rxyc, the stability of the thermal response of the bimetallic strip in the current circuit breaker is judged again. If it is unstable, the temperature compensation mechanism is started.

2. A circuit breaker opening and closing control method according to claim 1, characterized in that: The specific steps of S1 include: S11: Deploy current transformers at the power input and load ends in advance to monitor the current load changes in the circuit in real time, and obtain relevant circuit status data after summarizing. The relevant circuit status data includes the current changes in each time period and the heat transferred per unit time. ; S12: pre-installing a temperature sensor around the bimetallic strip in the circuit breaker to monitor the temperature fluctuation state of the bimetallic strip in the circuit breaker in real time, and collecting the data to obtain relevant environmental data, wherein the relevant environmental data includes monitoring different temperature conditions of the bimetallic strip in the circuit breaker; S13: By detecting the characteristics of the bimetallic strip in the circuit breaker and summarizing them, relevant material characteristic change data are obtained, wherein the relevant material characteristic change data includes the bending deformation of the bimetallic strip in the circuit breaker under different temperature conditions in the historical period. , Expansion coefficients of various types of metal sheets in bimetallic strips under different temperature conditions in historical periods , the force that triggers the opening of the gate , Young's modulus of bimetallic strip , the moment of inertia of the bimetallic strip , the quality of the bimetallic strip Specific heat capacity of bimetallic strip , the length of each type of metal strip in the bimetallic strip under different temperature conditions during the historical period and the initial length of each type of metal sheet ; S14: Data preprocessing is performed on the relevant circuit state data, relevant environmental data, and relevant material property change data, respectively, to fill missing values ​​using the forward filling method, detect outliers using box plots, and correct outliers using the average value of adjacent data, remove duplicate data entries, and scale the data to The data are normalized within the range, and then the pre-processed data are aggregated to generate the power data set.

3. A circuit breaker opening and closing control method according to claim 2, characterized in that: The specific steps of S1 also include: S15: Use the thermal expansion meter to obtain the expansion coefficients of various types of metal sheets in the bimetallic strip under different temperature conditions during the historical period. After summarizing, relevant trend data is generated and uploaded to the power data set. Based on the relevant trend data and combined with Python technology, the expansion coefficient is analyzed. The relationship between the change of temperature and the change of the temperature is used to construct a quadratic polynomial function, and the expression of the quadratic polynomial function is as follows: ； In the formula, It represents the expansion coefficient of the i-th type metal sheet under the condition of temperature T; It represents the expansion coefficient of the i-th type metal sheet under standard temperature conditions; Indicates the temperature value; i indicates the number of the corresponding metal piece in the bimetallic strip; and Respectively represent the thermal expansion coefficient of the i-th type metal sheet Linear and quadratic rates of change with temperature.

4. A circuit breaker opening and closing control method according to claim 3, characterized in that: The specific steps of S2 also include: S22: According to the relevant material property change data in the power data set, the bending deformation threshold Wyz is set. The specific setting method is as follows: ； In the formula, represents the initial length of the first type of metal sheet; represents the initial length of the second type of metal sheet; Indicates the force that triggers the opening of the gate; represents the Young's modulus of the bimetallic strip; represents the moment of inertia of the bimetallic strip.

5. A circuit breaker opening and closing control method according to claim 4, characterized in that: The specific steps of S2 also include: S23: Based on the bending deformation amount Wbz and the bending deformation threshold Wyz obtained in S21 and S22, the bending deformation amount Wbz and the bending deformation threshold Wyz are compared to determine whether to trigger the tripping mechanism. The specific contents are as follows: If the bending deformation Wbz exceeds the bending deformation threshold Wyz, the current needs to be disconnected to trigger the tripping mechanism; If the bending deformation Wbz does not exceed the bending deformation threshold Wyz, there is no need to disconnect the current and the tripping mechanism will not be triggered temporarily.

6. A circuit breaker opening and closing control method according to claim 5, characterized in that: The specific steps of S3 include: S31: Based on step S23, if the tripping mechanism is triggered, the temperature condition corresponding to the bending deformation amount Wbz exceeding the bending deformation threshold Wyz is determined and recorded as the upper limit temperature .

7. A circuit breaker opening and closing control method according to claim 6, characterized in that: The specific steps of S3 also include: S32: Based on upper temperature limit , and combined with the relevant material property change data and the relevant circuit state data, the thermal response time Rxyc is analyzed and calculated. The thermal response time Rxyc is obtained by the following formula: ； In the formula, Indicates time, represents the rate of change of temperature with respect to time, It represents the amount of heat transferred per unit time. Indicates the mass of the bimetallic strip, represents the specific heat capacity of the bimetallic strip, represents heat capacity; S33: The thermal response time Rxyc is calculated by analyzing the integrated temperature change step by step. The thermal response time Rxyc is obtained according to the following formula: ； In the formula, Indicates the temperature change value, Indicates the amount of heat transferred during a temperature change.

8. A circuit breaker opening and closing control method according to claim 7, characterized in that: The specific steps of S4 include: S41: presetting a safety time W, and comparing and analyzing the safety time W with the thermal response time Rxyc, to determine again the stability of the thermal response of the bimetallic strip in the current circuit breaker, the specific determination contents are as follows: If the thermal response time Rxyc exceeds the safety time W, it is determined again that the thermal response of the bimetallic strip in the current circuit breaker is in an unstable state, and the temperature compensation mechanism is activated at this time; If the thermal response time Rxyc does not exceed the safety time W, it is determined again that the thermal response of the bimetallic strip in the current circuit breaker is in a stable state, and the temperature compensation mechanism will not be started at this time; S42: When the temperature compensation mechanism is activated, the safety time W is substituted into the formula involved in step S33 to obtain the temperature change value under the safety time W. , and combined with the initial temperature value , calculate the maximum temperature value under the safety time W , based on the maximum temperature value under the safety time W And the maximum temperature value in S21 , obtain the temperature difference Wc, the temperature difference Wc is obtained by the following method: ; S43: Based on the temperature difference Wc, dynamically compensate the temperature condition in the next tripping mechanism triggering process to obtain a dynamic compensation factor Dbyz. The specific compensation content will be displayed through the dynamic compensation factor Dbyz: ； In the formula, Refers to the average expansion coefficient of the bimetallic strip at temperature T; Refers to the dynamic compensation factor under the condition of temperature T, which means the temperature compensation of the bimetallic strip under the condition of temperature T.

9. A circuit breaker-based opening and closing control system, used to implement a circuit breaker-based opening and closing control method as described in any one of claims 1 to 8, characterized in that: It includes monitoring module, experimental fitting module, mechanism triggering module, thermal response module and compensation module; The monitoring module is used to monitor the current load change, temperature fluctuation state and characteristics of the bimetallic strip in the circuit breaker in real time to generate relevant circuit state data, relevant environmental data and relevant material characteristic change data, and after preprocessing, construct an electric power data set; The experimental fitting module uses a thermal expansion instrument to detect the expansion coefficient of the bimetallic strip in the circuit breaker under different temperature conditions. , and combined with Python technology, analyze the expansion coefficient The relationship with temperature is used to construct a quadratic polynomial function; The mechanism trigger module will analyze the deformation of the bimetallic strip in the circuit breaker under different temperature conditions in real time based on the power data set and the quadratic polynomial function to generate the bending deformation amount Wbz, and set the bending deformation threshold Wyz in combination with the relevant material property change data in the power data set. By comparing the bending deformation amount Wbz with the bending deformation threshold Wyz, it is determined whether to trigger the tripping mechanism; The thermal response module will receive the tripping mechanism and trace back the entire process of the deformation of the bimetallic strip in the circuit breaker to determine the temperature of the bimetallic strip when the tripping mechanism is triggered, and record it as the upper limit temperature. , based on the upper temperature limit , and combined with the relevant material property change data, analyze and calculate the thermal response time Rxyc; The compensation module determines again the stability of the thermal response of the bimetallic strip in the current circuit breaker according to the value of the thermal response time Rxyc, and starts the temperature compensation mechanism if it is unstable.

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