Device and method for detecting closing pressure of ultra-high-speed circuit breaker

Abstract

The invention provides a closing pressure detection device for an ultra-high-speed circuit breaker, and relates to the circuit breaker closing press detection technology, and the device comprises a pressure sensor which is installed in a closing mechanism of the ultra-high-speed circuit breaker and is used for collecting a pressure signal in the closing process of the ultra-high-speed circuit breaker in real time; the signal conditioning module is connected with the pressure sensor and the data acquisition module and is used for carrying out amplification and filtering conditioning processing on the pressure signal acquired by the pressure sensor; the data acquisition module is used for receiving the conditioned pressure signal, converting the conditioned pressure signal into a digital signal and transmitting the digital signal to the data processing unit; and the data processing module is used for receiving the digital signal transmitted by the data acquisition module and carrying out data processing and analysis to obtain a closing pressure parameter of the ultra-high-speed circuit breaker. The problems that an existing detection method is not high in detection precision, complex in data processing and not accurate enough, and the requirement of an ultra-high-speed circuit breaker for precise detection of the closing pressure is difficult to meet are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker closing pressure detection, and in particular to a closing pressure detection device and method for an ultra-high-speed circuit breaker. Background Art

[0002] Ultra-high-speed circuit breakers play a vital role in power systems, and the reliability of their closing action directly affects the safe and stable operation of power systems. Closing pressure is one of the key parameters for the normal operation of ultra-high-speed circuit breakers. Accurate detection of closing pressure is of great significance for evaluating circuit breaker performance and timely detecting potential faults. However, existing detection methods have problems such as low detection accuracy, complex and inaccurate data processing, and are difficult to meet the requirements of ultra-high-speed circuit breakers for accurate detection of closing pressure. Summary of the invention

[0003] The problem solved by the present invention is that the existing detection method has the problems of low detection accuracy, complex and inaccurate data processing, and is difficult to meet the requirements of ultra-high-speed circuit breakers for accurate detection of closing pressure.

[0004] In order to solve the above problems, in a first aspect, the present invention provides a closing pressure detection device for an ultra-high-speed circuit breaker, the device comprising:

[0005] The pressure sensor is installed in the closing mechanism of the ultra-high-speed circuit breaker and is used to collect the pressure signal during the closing process of the ultra-high-speed circuit breaker in real time;

[0006] A signal conditioning module is connected to the pressure sensor and the data acquisition module, and is used to amplify and filter the pressure signal collected by the pressure sensor;

[0007] A data acquisition module is used to receive the conditioned pressure signal, convert the conditioned pressure signal into a digital signal, and transmit it to the data processing unit;

[0008] The data processing module is used to receive the digital signal transmitted by the data acquisition module, and perform data processing and analysis to obtain the closing pressure parameters of the ultra-high-speed circuit breaker.

[0009] Furthermore, it also includes:

[0010] A feature extraction module, used to extract closing pressure characteristic parameters from the closing pressure parameters of the ultra-high-speed circuit breaker, wherein the closing pressure characteristic parameters include pressure peak value, pressure rise time and pressure stabilization time;

[0011] A calculation module, used for calculating the closing pressure of the ultra-high-speed circuit breaker according to the closing pressure characteristic parameters;

[0012] The evaluation module is used to determine whether the closing pressure of the ultra-high-speed circuit breaker is within a preset standard range through the calculated closing pressure.

[0013] Furthermore, the process of extracting the closing pressure characteristic parameter from the closing pressure parameter of the ultra-high-speed circuit breaker includes:

[0014] After the data processing module obtains the closing pressure parameter of the ultra-high-speed circuit breaker, a pressure-time curve is drawn according to the closing pressure parameter, wherein the pressure-time curve includes data on the change of pressure over time during the closing process of the ultra-high-speed circuit breaker;

[0015] The pressure peak value is extracted by comparing the values ​​of each data point in the pressure-time curve, and the maximum pressure value is taken as the pressure peak value P max ;

[0016] Extraction of the pressure rise time: by determining the pressure value P corresponding to the pressure reaching x% of the peak value x％ , starting from the starting time position of the data reflected by the pressure-time curve, obtain the first time exceeding the pressure value P x％ The time point t1 of the pressure peak and the time point t2 corresponding to the pressure peak are used to calculate the pressure rise time through t1 and t2;

[0017] Extraction of the pressure stabilization time: determine the upper and lower limit pressure values ​​corresponding to the pressure stabilization range, traverse the data reflected by the pressure-time curve starting from the time point corresponding to the pressure peak, obtain the starting time point t3 and the ending time point t4 when the pressure enters the pressure stabilization range, and calculate the pressure stabilization time through t3 and t4.

[0018] Furthermore, the closing pressure of the ultra-high-speed circuit breaker is calculated by the closing pressure characteristic parameter, and the specific formula is as follows:

[0019] P=aP max +bt r +ct s +d(1)

[0020] t r =t2-t1(2)

[0021] t s =t4-t3(3)

[0022] Where, P is the closing pressure, P max is the peak pressure, t r is the pressure rise time, t s is the pressure stabilization time, a, b, c, d are all empirical coefficients;

[0023] Compare the calculated closing pressure with the preset standard range [P1, P2]:

[0024] If P∈[P1,P2], it means that the closing pressure is within the standard range and the closing pressure is normal;

[0025] If P≤P1 or P≥P2, it means that the closing pressure is abnormal and the ultra-high-speed circuit breaker needs to be repaired.

[0026] Furthermore, it also includes a temperature and humidity monitoring module for monitoring the temperature and humidity information of the environment;

[0027] The empirical coefficient adjustment module is used to adjust the size of the empirical coefficient in formula (1) according to the influence of different temperatures and humidity on the closing pressure during the closing process of the ultra-high-speed circuit breaker.

[0028] Furthermore, according to the influence of different temperatures and humidity on the closing pressure during the closing process of the ultra-high-speed circuit breaker, the size of the empirical coefficient in formula (1) is adjusted. The specific process is as follows:

[0029] Within the preset temperature range and the preset humidity range, perform multiple closing operations for each temperature and humidity combination;

[0030] The temperature, humidity and closing pressure characteristic parameters obtained from each closing operation are recorded and sorted, and stored according to different temperature and humidity ranges to form a complete data set;

[0031] According to the data set, a change curve of the closing pressure characteristic parameter in different temperature and humidity ranges is obtained, and the data set is divided into multiple sub-data sets according to the change curve, each sub-data set corresponds to a specific combination of temperature range and humidity range;

[0032] According to the changes of the closing pressure characteristic parameters under different combinations of temperature ranges and humidity ranges, the size of the empirical coefficient in each sub-data set is determined to obtain multiple empirical formulas;

[0033] The empirical formulas obtained from each sub-dataset are integrated to form a multi-conditional empirical formula model.

[0034] Furthermore, a verification module is included, which is used to verify the reliability of the empirical formula model according to the empirical formula model obtained by the empirical formula adjustment module. The specific process is as follows:

[0035] The data set is randomly divided into k subsets, one of which is taken as the test set each time, and the remaining k-1 subsets are taken as the training set. The training set data is used to fit the empirical formula according to the empirical formula model, and then the test set data is substituted into the fitted empirical formula to calculate the predicted value of the closing pressure.

[0036] Calculate the error index between the predicted closing pressure value and the actual closing pressure value, the formula is as follows:

[0037]

[0038] Among them, K1 is the mean square error, K2 is the mean absolute error, m is the number of test set samples, is the predicted value of closing pressure of the i-th sample, The actual value of closing pressure of the i-th sample;

[0039] Repeat the above process m times, using a different test set each time, to obtain m groups of error indicators. Calculate the average error indicator based on the m groups of error indicators. If the average error indicator is within the preset reasonable range, it means that the empirical formula model is reliable; if the average error indicator is not within the preset reasonable range, the empirical formula model needs to be improved and re-verified.

[0040] In a second aspect, the present invention provides a method for detecting closing pressure of an ultra-high-speed circuit breaker, using the above-mentioned closing pressure detection device of the ultra-high-speed circuit breaker, the method comprising:

[0041] The pressure sensor is installed in the closing mechanism of the ultra-high-speed circuit breaker, and the pressure signal during the closing process of the ultra-high-speed circuit breaker is collected in real time through the pressure sensor;

[0042] Connect the signal conditioning module to the pressure sensor and the data acquisition module, and amplify and filter the pressure signal collected by the pressure sensor through the signal conditioning module;

[0043] The conditioned pressure signal is converted into a digital signal through the data processing module and transmitted to the data processing unit;

[0044] The digital signal is processed and analyzed by the data processing module to obtain the closing pressure parameters of the ultra-high-speed circuit breaker.

[0045] Furthermore, it also includes:

[0046] Extracting closing pressure characteristic parameters from closing pressure parameters of the ultra-high-speed circuit breaker, wherein the closing pressure characteristic parameters include pressure peak value, pressure rise time and pressure stabilization time;

[0047] Calculate the closing pressure of the ultra-high-speed circuit breaker according to the closing pressure characteristic parameters through the calculation module;

[0048] The evaluation module determines whether the closing pressure of the ultra-high-speed circuit breaker is within a preset standard range according to the calculated closing pressure;

[0049] Monitor the temperature and humidity information of the environment through the temperature and humidity monitoring module;

[0050] The empirical coefficient adjustment module obtains a multi-condition empirical formula model according to the influence of different temperatures and humidity on the closing pressure during the closing process of the ultra-high-speed circuit breaker;

[0051] The reliability of the empirical formula model is verified through the verification module.

[0052] In a third aspect, the present invention further provides a computing device based on the closing pressure detection method of an ultra-high-speed circuit breaker, characterized in that it includes:

[0053] One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include instructions for executing any of the above methods.

[0054] Beneficial effects:

[0055] 1. The present invention is based on the closing pressure detection device of the ultra-high-speed circuit breaker, which adopts a pressure sensor and an optimized data processing algorithm, and can accurately detect the closing pressure of the ultra-high-speed circuit breaker, thereby improving the detection accuracy and effectively avoiding misjudgment and missed judgment;

[0056] 2. The closing pressure detection device of the ultra-high-speed circuit breaker of the present invention is based on the pressure calculation method based on feature extraction and empirical formula, which comprehensively considers multiple key factors in the pressure change process, so that the calculation result can more truly reflect the closing pressure state of the ultra-high-speed circuit breaker, and provides a strong basis for its performance evaluation and fault diagnosis;

[0057] 3. The present invention is based on a closing pressure detection device for an ultra-high-speed circuit breaker. It adjusts and updates the empirical formula according to the characteristic differences of the ultra-high-speed circuit breaker under different temperatures and humidities, and effectively verifies its reliability, thereby providing a more accurate basis for the performance evaluation and fault diagnosis of the ultra-high-speed circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 This is a block diagram of a closing pressure detection device based on an ultra-high-speed circuit breaker of the present invention;

[0059] Figure 2 It is a detailed block diagram of the closing pressure detection device based on the ultra-high-speed circuit breaker of the present invention;

[0060] Figure 3 The present invention is a flow chart of a closing pressure detection method based on an ultra-high-speed circuit breaker. DETAILED DESCRIPTION

[0061] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0062] See also Figure 1-2 The embodiment of the present invention provides a closing pressure detection device for an ultra-high-speed circuit breaker, the device comprising:

[0063] The pressure sensor is installed in the closing mechanism of the ultra-high-speed circuit breaker and is used to collect the pressure signal in the closing process of the ultra-high-speed circuit breaker in real time; the pressure sensor is a high-precision pressure sensor to improve the accuracy of pressure signal collection;

[0064] The signal conditioning module connects the pressure sensor and the data acquisition module, and is used to amplify and filter the pressure signal collected by the pressure sensor; the amplification factor can be adjusted according to the size of the output signal of the pressure sensor to adjust the signal amplitude to a suitable input range of the data acquisition module; the filtering circuit adopts a low-pass filter, which can effectively filter out high-frequency noise interference and improve the signal-to-noise ratio of the signal;

[0065] The data acquisition module is used to receive the conditioned pressure signal, convert the conditioned pressure signal into a digital signal, and transmit it to the data processing unit; the sampling frequency of the data acquisition module is set in conjunction with the signal conditioning module, which can meet the data acquisition requirements of the rapid pressure change during the closing process of the ultra-high-speed circuit breaker, and ensure that enough pressure data points are collected to accurately restore the pressure change curve;

[0066] The data processing module is used to receive the digital signal transmitted by the data acquisition module, and perform data processing and analysis to obtain the closing pressure parameters of the ultra-high-speed circuit breaker; after receiving the digital signal, the data processing unit first cleans the data to remove abnormal values ​​and obviously erroneous data points; optionally, the abnormal value judgment can adopt a method based on statistical principles, for example, if the difference between a data point and an adjacent data point exceeds a set threshold, it is judged as an abnormal value and eliminated; a digital filtering algorithm is used to further remove residual noise, and optionally, a finite impulse response digital filtering algorithm is used, and its filter coefficient is designed according to the required filtering characteristics.

[0067] A feature extraction module, used to extract closing pressure characteristic parameters from the closing pressure parameters of the ultra-high-speed circuit breaker, where the closing pressure characteristic parameters include pressure peak value, pressure rise time and pressure stabilization time;

[0068] A calculation module, used for calculating the closing pressure of the ultra-high-speed circuit breaker according to the closing pressure characteristic parameters;

[0069] An evaluation module, used for judging whether the closing pressure of the ultra-high-speed circuit breaker is within a preset standard range according to the calculated closing pressure;

[0070] Temperature and humidity monitoring module, used to monitor the temperature and humidity information of the environment;

[0071] An empirical coefficient adjustment module is used to adjust the size of the empirical coefficient in formula (1) according to the influence of different temperatures and humidity on the closing pressure during the closing process of the ultra-high-speed circuit breaker;

[0072] The verification module is used to verify the reliability of the empirical formula model according to the empirical formula model obtained by the empirical formula adjustment module.

[0073] In a specific implementation process, the process of extracting the closing pressure characteristic parameter from the closing pressure parameter of the ultra-high-speed circuit breaker includes:

[0074] After the data processing module obtains the closing pressure parameters of the ultra-high-speed circuit breaker, a pressure-time curve is drawn according to the closing pressure parameters. The pressure-time curve includes data on the change of pressure over time during the closing process of the ultra-high-speed circuit breaker.

[0075] Extraction of pressure peak value: obtained by comparing the values ​​of each data point in the pressure-time curve, and taking the maximum pressure as the pressure peak value P max ;

[0076] Extraction of pressure rise time: by determining the pressure value P corresponding to the pressure reaching x% of the peak value x％ , starting from the starting time position of the data reflected by the pressure-time curve, obtain the first time exceeding the pressure value P x％ The time point t1 of the pressure peak and the time point t2 corresponding to the pressure peak are used to calculate the pressure rise time through t1 and t2;

[0077] Extraction of pressure stabilization time: determine the upper and lower pressure limits corresponding to the pressure stabilization range, traverse the data reflected by the pressure-time curve starting from the time point corresponding to the pressure peak, obtain the starting time point t3 and the ending time point t4 when the pressure enters the pressure stabilization range, and calculate the pressure stabilization time through t3 and t4.

[0078] In the specific implementation process,

[0079] The closing pressure of the ultra-high-speed circuit breaker is calculated by the closing pressure characteristic parameters. The specific formula is as follows:

[0080] P=aP max +bt r +ct s +d(1)

[0081] t r =t2-t1(2)

[0082] t s =t4-t3(3)

[0083] Where, P is the closing pressure, P max is the peak pressure, t ris the pressure rise time, t s is the pressure stabilization time, a, b, c, d are all empirical coefficients;

[0084] The closing pressure of the ultra-high-speed circuit breaker is calculated according to formula (1), formula (2) and formula (3), and the calculated closing pressure is compared with the preset standard range [P1, P2]:

[0085] If P∈[P1,P2], it means that the closing pressure is within the standard range and the closing pressure is normal;

[0086] If P≤P1 or P≥P2, it means that the closing pressure is abnormal and the ultra-high-speed circuit breaker needs to be repaired.

[0087] In the specific implementation process, according to the influence of different temperatures and humidity on the closing pressure during the closing process of the ultra-high-speed circuit breaker, the size of the empirical coefficient in formula (1) is adjusted. The specific process is as follows:

[0088] Within the preset temperature range and the preset humidity range, perform multiple closing operations for each temperature and humidity combination;

[0089] The temperature, humidity and closing pressure characteristic parameters obtained from each closing operation are recorded and sorted, and stored according to different temperature and humidity ranges to form a complete data set;

[0090] According to the data set, a change curve of the closing pressure characteristic parameter in different temperature and humidity ranges is obtained, and the data set is divided into multiple sub-data sets according to the change curve, each sub-data set corresponds to a specific combination of temperature range and humidity range;

[0091] According to the changes of the closing pressure characteristic parameters under different combinations of temperature ranges and humidity ranges, the size of the empirical coefficient in each sub-data set is determined to obtain multiple empirical formulas;

[0092] The empirical formulas obtained from each sub-dataset are integrated to form a multi-conditional empirical formula model.

[0093] In the specific implementation process, the empirical formula model obtained by the empirical formula adjustment module is used to verify the reliability of the empirical formula model. The specific process is as follows:

[0094] The data set is randomly divided into k subsets, one of which is taken as the test set each time, and the remaining k-1 subsets are taken as the training set. The training set data is used to fit the empirical formula according to the empirical formula model, and then the test set data is substituted into the fitted empirical formula to calculate the predicted value of the closing pressure.

[0095] Calculate the error index between the predicted closing pressure value and the actual closing pressure value, the formula is as follows:

[0096]

[0097] Among them, K1 is the mean square error, K2 is the mean absolute error, m is the number of test set samples, is the predicted value of closing pressure of the i-th sample, The actual value of closing pressure of the i-th sample;

[0098] Repeat the above process m times, using a different test set each time, to obtain m groups of error indicators. Calculate the average error indicator based on the m groups of error indicators. If the average error indicator is within the preset reasonable range, it means that the empirical formula model is reliable; if the average error indicator is not within the preset reasonable range, the empirical formula model needs to be improved and re-verified.

[0099] See also Figure 3 , also provides a detection method of the detection device of the present invention, the method specifically comprising:

[0100] S1. Install a pressure sensor in the closing mechanism of the ultra-high-speed circuit breaker, and collect pressure signals in the closing process of the ultra-high-speed circuit breaker in real time through the pressure sensor;

[0101] S2, connecting the signal conditioning module to the pressure sensor and the data acquisition module, and amplifying and filtering the pressure signal collected by the pressure sensor through the signal conditioning module;

[0102] S3, converting the conditioned pressure signal into a digital signal through the data processing module and transmitting it to the data processing unit;

[0103] S4. Processing and analyzing the digital signal through a data processing module to obtain a closing pressure parameter of the ultra-high-speed circuit breaker;

[0104] S5. Extract closing pressure characteristic parameters from the closing pressure parameters of the ultra-high-speed circuit breaker. The closing pressure characteristic parameters include pressure peak value, pressure rise time and pressure stabilization time. Specifically:

[0105] After the data processing module obtains the closing pressure parameters of the ultra-high-speed circuit breaker, a pressure-time curve is drawn according to the closing pressure parameters. The pressure-time curve includes data on the change of pressure over time during the closing process of the ultra-high-speed circuit breaker.

[0106] Extraction of pressure peak value: obtained by comparing the values ​​of each data point in the pressure-time curve, and taking the maximum pressure as the pressure peak value P max ;

[0107] Extraction of pressure rise time: by determining the pressure value P corresponding to the pressure reaching x% of the peak value x％, starting from the starting time position of the data reflected by the pressure-time curve, obtain the first time exceeding the pressure value P x％ The time point t1 of the pressure peak and the time point t2 corresponding to the pressure peak are used to calculate the pressure rise time through t1 and t2;

[0108] Extraction of pressure stabilization time: determine the upper and lower pressure limits corresponding to the pressure stabilization range, traverse the data reflected by the pressure-time curve from the time point corresponding to the pressure peak, obtain the starting time point t3 and the ending time point t4 when the pressure enters the pressure stabilization range, and calculate the pressure stabilization time through t3 and t4;

[0109] S6. Calculate the closing pressure of the ultra-high-speed circuit breaker according to the closing pressure characteristic parameters through the calculation module, specifically:

[0110] The closing pressure of the ultra-high-speed circuit breaker is calculated by the closing pressure characteristic parameters. The specific formula is as follows:

[0111] P=aP max +bt r +ct s +d(1)

[0112] t r =t2-t1(2)

[0113] t s =t4-t3(3)

[0114] Where, P is the closing pressure, P max is the peak pressure, t r is the pressure rise time, t s is the pressure stabilization time, a, b, c, d are all empirical coefficients;

[0115] Compare the calculated closing pressure with the preset standard range [P1, P2]:

[0116] If P∈[P1,P2], it means that the closing pressure is within the standard range and the closing pressure is normal;

[0117] If P≤P1 or P≥P2, it means that the closing pressure is abnormal and the ultra-high-speed circuit breaker needs to be repaired;

[0118] S7, judging whether the closing pressure of the ultra-high-speed circuit breaker is within a preset standard range according to the calculated closing pressure by the evaluation module;

[0119] S8, monitoring the temperature and humidity information of the environment through the temperature and humidity monitoring module;

[0120] S9, the empirical coefficient adjustment module obtains a multi-condition empirical formula model according to the influence of different temperatures and humidity on the closing pressure during the closing process of the ultra-high-speed circuit breaker, specifically:

[0121] Within the preset temperature range and the preset humidity range, perform multiple closing operations for each temperature and humidity combination;

[0122] The temperature, humidity and closing pressure characteristic parameters obtained from each closing operation are recorded and sorted, and stored according to different temperature and humidity ranges to form a complete data set;

[0123] According to the data set, a change curve of the closing pressure characteristic parameter in different temperature and humidity ranges is obtained, and the data set is divided into multiple sub-data sets according to the change curve, each sub-data set corresponds to a specific combination of temperature range and humidity range;

[0124] According to the changes of the closing pressure characteristic parameters under different combinations of temperature ranges and humidity ranges, the size of the empirical coefficient in each sub-data set is determined to obtain multiple empirical formulas;

[0125] Integrate the empirical formulas obtained from each sub-data set to form a multi-conditional empirical formula model;

[0126] S10. Verify the reliability of the empirical formula model through the verification module, specifically:

[0127] The data set is randomly divided into k subsets, one of which is taken as the test set each time, and the remaining k-1 subsets are taken as the training set. The training set data is used to fit the empirical formula according to the empirical formula model, and then the test set data is substituted into the fitted empirical formula to calculate the predicted value of the closing pressure.

[0128] Calculate the error index between the predicted closing pressure value and the actual closing pressure value, the formula is as follows:

[0129]

[0130] Among them, K1 is the mean square error, K2 is the mean absolute error, m is the number of test set samples, is the predicted value of closing pressure of the i-th sample, The actual value of closing pressure of the i-th sample;

[0131] Repeat the above process m times, using a different test set each time, to obtain m groups of error indicators. Calculate the average error indicator based on the m groups of error indicators. If the average error indicator is within the preset reasonable range, it means that the empirical formula model is reliable; if the average error indicator is not within the preset reasonable range, the empirical formula model needs to be improved and re-verified.

[0132] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A closing pressure detection device for an ultra-high-speed circuit breaker, characterized in that: The device comprises: The pressure sensor is installed in the closing mechanism of the ultra-high-speed circuit breaker and is used to collect the pressure signal during the closing process of the ultra-high-speed circuit breaker in real time; A signal conditioning module is connected to the pressure sensor and the data acquisition module, and is used to amplify and filter the pressure signal collected by the pressure sensor; A data acquisition module is used to receive the conditioned pressure signal, convert the conditioned pressure signal into a digital signal, and transmit it to the data processing unit; The data processing module is used to receive the digital signal transmitted by the data acquisition module, and perform data processing and analysis to obtain the closing pressure parameters of the ultra-high-speed circuit breaker.

2. The closing pressure detection device for an ultra-high-speed circuit breaker according to claim 1, characterized in that: Also includes: A feature extraction module, used to extract closing pressure characteristic parameters from the closing pressure parameters of the ultra-high-speed circuit breaker, wherein the closing pressure characteristic parameters include pressure peak value, pressure rise time and pressure stabilization time; A calculation module, used for calculating the closing pressure of the ultra-high-speed circuit breaker according to the closing pressure characteristic parameters; The evaluation module is used to determine whether the closing pressure of the ultra-high-speed circuit breaker is within a preset standard range through the calculated closing pressure.

3. The closing pressure detection device for an ultra-high-speed circuit breaker according to claim 2, characterized in that: The process of extracting the closing pressure characteristic parameter from the closing pressure parameter of the ultra-high-speed circuit breaker comprises: After the data processing module obtains the closing pressure parameter of the ultra-high-speed circuit breaker, a pressure-time curve is drawn according to the closing pressure parameter, wherein the pressure-time curve includes data on the change of pressure over time during the closing process of the ultra-high-speed circuit breaker; The pressure peak value is extracted by comparing the values ​​of each data point in the pressure-time curve, and the maximum pressure value is taken as the pressure peak value P max ; Extraction of the pressure rise time: by determining the pressure value P corresponding to the pressure reaching x% of the peak value x％ , starting from the starting time position of the data reflected by the pressure-time curve, obtain the first time exceeding the pressure value P x％ The time point t1 of the pressure peak and the time point t2 corresponding to the pressure peak are used to calculate the pressure rise time through t1 and t2; Extraction of the pressure stabilization time: determine the upper and lower limit pressure values ​​corresponding to the pressure stabilization range, traverse the data reflected by the pressure-time curve starting from the time point corresponding to the pressure peak, obtain the starting time point t3 and the ending time point t4 when the pressure enters the pressure stabilization range, and calculate the pressure stabilization time through t3 and t4.

4. The closing pressure detection device for an ultra-high-speed circuit breaker according to claim 3, characterized in that: The specific formula for calculating the closing pressure of the ultra-high-speed circuit breaker by using the closing pressure characteristic parameter is as follows: P=aP max +bt r +ct s +d (1) t r =t2-t1 (2) t s =t4-t3 (3) Where, P is the closing pressure, P max is the peak pressure, t r is the pressure rise time, t s is the pressure stabilization time, a, b, c, d are all empirical coefficients; Compare the calculated closing pressure with the preset standard range [P1, P2]: If P∈[P1,P2], it means that the closing pressure is within the standard range and the closing pressure is normal; If P≤P1 or P≥P2, it means that the closing pressure is abnormal and the ultra-high-speed circuit breaker needs to be repaired.

5. The closing pressure detection device for an ultra-high-speed circuit breaker according to claim 4, characterized in that: It also includes a temperature and humidity monitoring module for monitoring the temperature and humidity information of the environment; The empirical coefficient adjustment module is used to adjust the size of the empirical coefficient in formula (1) according to the influence of different temperatures and humidity on the closing pressure during the closing process of the ultra-high-speed circuit breaker.

6. The closing pressure detection device for an ultra-high-speed circuit breaker according to claim 5, characterized in that: According to the influence of different temperatures and humidity on the closing pressure during the closing process of the ultra-high-speed circuit breaker, the size of the empirical coefficient in formula (1) is adjusted. The specific process is as follows: Within the preset temperature range and the preset humidity range, perform multiple closing operations for each temperature and humidity combination; The temperature, humidity and closing pressure characteristic parameters obtained from each closing operation are recorded and sorted, and stored according to different temperature and humidity ranges to form a complete data set; According to the data set, a change curve of the closing pressure characteristic parameter in different temperature and humidity ranges is obtained, and the data set is divided into multiple sub-data sets according to the change curve, each sub-data set corresponds to a specific combination of temperature range and humidity range; According to the changes of the closing pressure characteristic parameters under different combinations of temperature ranges and humidity ranges, the size of the empirical coefficient in each sub-data set is determined to obtain multiple empirical formulas; The empirical formulas obtained from each sub-dataset are integrated to form a multi-conditional empirical formula model.

7. The closing pressure detection device for an ultra-high-speed circuit breaker according to claim 6, characterized in that: It also includes a verification module, which is used to verify the reliability of the empirical formula model obtained by the empirical formula adjustment module. The specific process is as follows: The data set is randomly divided into k subsets, one of which is taken as the test set each time, and the remaining k-1 subsets are taken as the training set. The training set data is used to fit the empirical formula according to the empirical formula model, and then the test set data is substituted into the fitted empirical formula to calculate the predicted value of the closing pressure. Calculate the error index between the predicted closing pressure value and the actual closing pressure value, the formula is as follows: Among them, K1 is the mean square error, K2 is the mean absolute error, m is the number of test set samples, is the predicted value of closing pressure of the i-th sample, The actual value of closing pressure of the i-th sample; Repeat the above process m times, using a different test set each time, to obtain m groups of error indicators. Calculate the average error indicator based on the m groups of error indicators. If the average error indicator is within the preset reasonable range, it means that the empirical formula model is reliable; if the average error indicator is not within the preset reasonable range, the empirical formula model needs to be improved and re-verified.

8. A method for detecting closing pressure of an ultra-high-speed circuit breaker, using the ultra-high-speed circuit breaker closing pressure detection device according to any one of claims 1 to 7, characterized in that: The method comprises: The pressure sensor is installed in the closing mechanism of the ultra-high-speed circuit breaker, and the pressure signal during the closing process of the ultra-high-speed circuit breaker is collected in real time through the pressure sensor; Connect the signal conditioning module to the pressure sensor and the data acquisition module, and amplify and filter the pressure signal collected by the pressure sensor through the signal conditioning module; The conditioned pressure signal is converted into a digital signal through the data processing module and transmitted to the data processing unit; The digital signal is processed and analyzed by the data processing module to obtain the closing pressure parameters of the ultra-high-speed circuit breaker.

9. A method for detecting closing pressure of an ultra-high-speed circuit breaker according to claim 8, characterized in that: Also includes: Extracting closing pressure characteristic parameters from closing pressure parameters of the ultra-high-speed circuit breaker, wherein the closing pressure characteristic parameters include pressure peak value, pressure rise time and pressure stabilization time; Calculate the closing pressure of the ultra-high-speed circuit breaker according to the closing pressure characteristic parameters through the calculation module; The evaluation module determines whether the closing pressure of the ultra-high-speed circuit breaker is within a preset standard range according to the calculated closing pressure; Monitor the temperature and humidity information of the environment through the temperature and humidity monitoring module; The empirical coefficient adjustment module obtains a multi-condition empirical formula model according to the influence of different temperatures and humidity on the closing pressure during the closing process of the ultra-high-speed circuit breaker; The reliability of the empirical formula model is verified through the verification module.

10. A computing device based on a closing pressure detection method for an ultra-high-speed circuit breaker, characterized in that: include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include instructions for executing any of the methods according to claims 8-9.

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