Universal protection method and system for energy storage motor of circuit breaker

Abstract

The invention discloses a circuit breaker energy storage motor general protection method and system, and relates to the technical field of circuit breaker energy storage motor protection, and the method comprises the steps: collecting the real-time current data of an energy storage motor, and carrying out the preprocessing of the collected data; analyzing current data in real time, performing overcurrent fault judgment, and setting and adjusting overtime protection time through a dynamic threshold adjustment algorithm; through real-time monitoring of current and time data, an emergency stop instruction is executed immediately after a fault is identified, and a locking instruction is triggered after emergency stop. According to the method, a reliable data basis is provided for subsequent fault judgment, so that the accuracy and reliability of the whole protection system are improved, protection parameters are automatically adjusted according to the actual operation condition of the motor, safe operation of the motor under the complex working condition is ensured, the fault response time is greatly shortened, and the working efficiency is improved. Reset operation and all-directional self-inspection after troubleshooting ensure that the motor is in a safe working state before running recovery, and the safety and stability of the system are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker energy storage motor protection, and in particular to a circuit breaker energy storage motor universal protection method and system. Background Art

[0002] In modern power systems, circuit breaker energy storage motors are key actuators and their role cannot be underestimated. Circuit breakers store energy and quickly release it when needed to drive the circuit breakers to complete opening and closing operations, ensuring the stability and safety of the power system. With the continuous expansion of the scale and increase in complexity of power systems, the protection requirements for circuit breaker energy storage motors are also increasing. Traditional motor protection technologies, such as overload protection and short-circuit protection, can ensure the safe operation of motors within a certain range, but still expose many problems in practical applications.

[0003] The existing circuit breaker energy storage motor protection technology still has many shortcomings. In terms of current data acquisition and preprocessing, the existing technology generally uses analog filters or digital filtering algorithms to process current signals. However, these methods are often difficult to effectively filter out high-frequency noise and random interference when facing complex working conditions, resulting in the authenticity and reliability of current data being affected. Due to the dynamic changes in current during motor operation, the fixed threshold overcurrent fault judgment method is too simple and cannot adapt to current fluctuations, thereby increasing the risk of misjudgment and missed judgment. In the setting of the timeout protection time, most of the existing technologies use preset values. This approach ignores the differences in the actual operation of the motor. Due to the different loads and operating states of the motor under different working conditions, the fixed timeout protection time is difficult to meet the needs of all situations, which to a certain extent limits the flexibility and effectiveness of the protection system. At the same time, for the requirements of fault response speed, the existing protection system often delays the execution of emergency stop and locking instructions after identifying the fault, which may cause the motor to run too long in the fault state, thereby causing more serious damage. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] Therefore, the technical problem solved by the present invention is that the existing circuit breaker energy storage motor protection technology method has the problems of insufficient current data preprocessing, poor adaptability of fixed threshold judgment, inflexible time setting of timeout protection time and slow execution speed of emergency stop lockout command after fault.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a universal protection method for a circuit breaker energy storage motor, comprising collecting real-time current data of the energy storage motor and preprocessing the collected data; analyzing the current data in real time, making an overcurrent fault judgment, and setting and adjusting the timeout protection time through a dynamic threshold adjustment algorithm; through real-time monitoring of the current and time data, an emergency stop command is immediately executed after a fault is identified, and a locking command is triggered after the emergency stop.

[0007] As a preferred solution of the circuit breaker energy storage motor universal protection method of the present invention, the circuit breaker energy storage motor universal protection method is characterized in that the real-time current data of the energy storage motor includes the instantaneous current value of the energy storage motor, the voltage data of the motor, the temperature data of the motor and the current fluctuation amplitude signal

[0008] As a preferred solution of the universal protection method for energy storage motor of circuit breaker of the present invention, the preprocessing includes adding time attenuation factor and standard deviation of current fluctuation on the basis of Kalman filtering, removing random noise, adjusting the filtering intensity in real time according to the volatility of current data, and reflecting the running state of the motor through the filtered current data, which is expressed as:

[0009]

[0010] in, is the estimated value of the energy storage motor current after filtering at time step k, is the estimated current value of the energy storage motor after filtering at time step k-1, which is the estimated current value after filtering at the previous time point, K k is the Kalman gain at time step k, I k is the actual measured current value of the energy storage motor at time step k, which is the current data directly collected from the sensor at the current moment. H is the observation matrix, which represents the proportional coefficient of the current measurement system, σ I is the standard deviation of the energy storage motor current data, indicating the amplitude of current fluctuation, θ k is the adaptive adjustment factor of time step k, λ t is the time attenuation factor at time t, reflecting the trend of current signal attenuation over time, and is used to compensate for the time correlation regulation mechanism; the Kalman gain of time step k is expressed as:

[0011]

[0012] Among them, P k-1 is the error covariance matrix at time step k-1, H T represents the transpose of the observation matrix, ψ kis the noise adjustment factor at time step k, which is used to adjust the deviation caused by noise in the current estimation process. R is the observation noise covariance matrix, which represents the intensity of the measurement noise. is the time correlation adjustment factor of time step k, reflecting the time-related error accumulation characteristics in the energy storage motor current estimation process; the updated error covariance matrix is ​​expressed as:

[0013]

[0014] Where Q is the process noise covariance matrix, which represents the strength of the model prediction error, and I is the unit matrix with the same dimension as P. k same.

[0015] As a preferred solution of the universal protection method for energy storage motor of circuit breaker of the present invention, the overcurrent fault judgment includes using a fast detection algorithm to analyze the preprocessed current data and judge whether there is an overcurrent situation in real time, which is expressed as:

[0016]

[0017] Among them, I fault Indicates the result of overcurrent fault judgment. A value of 1 indicates that an overcurrent fault is detected, and a value of 0 indicates that no overcurrent fault is detected. represents the current data after Kalman filtering at time t, which is the best estimate of the current of the energy storage motor, μ t It represents the historical average value of the filtered current from time tT to t, which is used as the reference point of the current stable state. ξ is the sensitivity adjustment factor of overcurrent detection, which is used to control the threshold of overcurrent judgment. threshold is the overcurrent detection threshold; the current change rate function is expressed as:

[0018]

[0019] Among them, Δt represents the time interval; the historical average current value is expressed as:

[0020]

[0021] Where T represents the length of the history window, represents the current data after Kalman filtering at time t′; the current standard deviation is expressed as:

[0022]

[0023] When the current exceeds the overcurrent detection threshold, an overcurrent fault exists.

[0024] As a preferred solution of the universal protection method for energy storage motor of circuit breaker of the present invention, the setting and adjusting of the timeout protection time includes introducing the historical fluctuation of current, the time attenuation factor and the result of overcurrent detection to form a dynamic adjustment model of the timeout protection time, which is expressed as:

[0025]

[0026] Among them, T threshold (t) is the dynamic timeout protection threshold at time t. When the motor running time exceeds the set safety threshold T threshold (t), automatically triggers the timeout protection command and stops the further operation of the motor, T 0 is the initial set timeout protection time, which is the protection time value preset in the system default situation. β is the dynamic adjustment coefficient that controls the influence of historical current fluctuation on the timeout protection time, reflecting the sensitivity of current fluctuation to the protection time. 0 To monitor the initial time point, I ref is the rated current value of the energy storage motor, ω is the period of fluctuation, is the phase shift, and γ is the nonlinear adjustment coefficient used to adjust the current change rate.

[0027] As a preferred solution of the universal protection method for circuit breaker energy storage motors described in the present invention, the execution of the emergency stop command includes immediately triggering a warning signal once an overcurrent fault is detected, stopping the motor operation, and cutting off the motor power supply through the system's built-in emergency stop command.

[0028] As a preferred solution of the universal protection method for energy storage motor of circuit breaker described in the present invention, wherein: the triggering locking instruction includes locking the motor starting authority until the fault is completely eliminated. When the fault is eliminated, the operator is prompted to perform a reset operation. The reset includes releasing the locking state, reactivating the starting authority, and performing a comprehensive self-check on the motor, and resuming operation after confirming that it is in a safe working state.

[0029] Another object of the present invention is to provide a universal protection system for circuit breaker energy storage motors, which can perform overcurrent fault judgment by real-time analysis of current data, and set and adjust the timeout protection time through a dynamic threshold adjustment algorithm, thereby solving the problem of low reliability of current circuit breaker energy storage motor protection technology.

[0030] As a preferred solution of the universal protection system for energy storage motors of circuit breakers described in the present invention, it includes: a data processing module, a current analysis module, and a motor protection module; the data processing module is used to collect real-time current data of the energy storage motor and pre-process the collected data; the current analysis module is used to analyze the current data in real time, make overcurrent fault judgments, and set and adjust the timeout protection time through a dynamic threshold adjustment algorithm; the motor protection module is used to monitor the current and time data in real time, immediately execute an emergency stop command after identifying a fault, and trigger a locking command after the emergency stop.

[0031] A computer device includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement a universal protection method for a circuit breaker energy storage motor.

[0032] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of a general protection method for a circuit breaker energy storage motor.

[0033] Beneficial effects of the present invention: The universal protection method for energy storage motors of circuit breakers provided by the present invention collects real-time current data of energy storage motors and performs preprocessing, and adds a time attenuation factor and a standard deviation of current fluctuations on the basis of Kalman filtering, thereby effectively removing random noise and improving the quality of data. It can more accurately reflect the actual operating state of the motor, and provide a reliable data basis for subsequent fault judgment, reducing the possibility of misjudgment, thereby improving the accuracy and reliability of the entire protection system; through a dynamic adjustment mechanism, the protection parameters can be automatically adjusted according to the actual operating conditions of the motor, the adaptive ability of the protection system is improved, potential overcurrent faults can be identified in a timely manner, and the motor can be prevented from being damaged due to overcurrent, and the dynamic threshold The adjustment reduces misjudgments and missed judgments caused by fixed thresholds, achieves rapid response and accurate identification of motor overcurrent faults, and ensures safe operation of the motor under complex working conditions; through real-time monitoring of current and time data, once a fault is identified, the emergency stop command is immediately executed, and the locking command is triggered after the emergency stop, thereby achieving immediate processing and prevention of motor faults, greatly shortening the fault response time, effectively preventing further deterioration of the fault state, protecting the motor from serious damage, and ensuring that the motor is in a safe working state before resuming operation, further improving the safety and stability of the system. The present invention achieves better results in improving system accuracy, accurate identification of faults, and fault prevention and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0035] Figure 1 An overall flow chart of a universal protection method for a circuit breaker energy storage motor provided in the first embodiment of the present invention.

[0036] Figure 2 An overall flow chart of a universal protection system for energy storage motors of circuit breaker provided in the third embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0038] Example 1

[0039] Reference Figure 1 , as an embodiment of the present invention, provides a general protection method for a circuit breaker energy storage motor, comprising:

[0040] S1: Collect the real-time current data of the energy storage motor and pre-process the collected data.

[0041] Furthermore, the real-time current data of the energy storage motor includes the instantaneous current value of the energy storage motor, the voltage data of the motor, the temperature data of the motor and the current fluctuation amplitude signal.

[0042] It should be noted that the preprocessing includes adding the time attenuation factor and the standard deviation of the current fluctuation on the basis of Kalman filtering, removing random noise, adjusting the filtering intensity in real time according to the volatility of the current data, and reflecting the running state of the motor through the filtered current data, which is expressed as:

[0043]

[0044] in, is the estimated value of the energy storage motor current after filtering at time step k, is the estimated current value of the energy storage motor after filtering at time step k-1, which is the estimated current value after filtering at the previous time point, K k is the Kalman gain at time step k, I kis the actual measured current value of the energy storage motor at time step k, which is the current data directly collected from the sensor at the current moment. H is the observation matrix, which represents the proportional coefficient of the current measurement system, σ I is the standard deviation of the energy storage motor current data, indicating the amplitude of current fluctuation, θ k is the adaptive adjustment factor of time step k, λ t is the time attenuation factor at time t, reflecting the trend of current signal attenuation over time, and is used to compensate for the time correlation regulation mechanism; the Kalman gain of time step k is expressed as:

[0045]

[0046] Among them, P k-1 is the error covariance matrix at time step k-1, H T represents the transpose of the observation matrix, ψ k is the noise adjustment factor at time step k, which is used to adjust the deviation caused by noise in the current estimation process. R is the observation noise covariance matrix, which represents the intensity of the measurement noise. is the time correlation adjustment factor of time step k, reflecting the time-related error accumulation characteristics in the energy storage motor current estimation process; the updated error covariance matrix is ​​expressed as:

[0047]

[0048] Where Q is the process noise covariance matrix, which represents the strength of the model prediction error, and I is the unit matrix with the same dimension as P. k same.

[0049] It should also be noted that by collecting the real-time current data of the energy storage motor and preprocessing it, and adding the time attenuation factor and the standard deviation of the current fluctuation on the basis of the Kalman filter, the random noise is effectively removed, the quality of the data is improved, and it can more accurately reflect the actual operating status of the motor, providing a reliable data basis for subsequent fault judgment, reducing the possibility of misjudgment, and thus improving the accuracy and reliability of the entire protection system.

[0050] S2: Analyze current data in real time, make overcurrent fault judgment, and set and adjust the timeout protection time through the dynamic threshold adjustment algorithm.

[0051] Furthermore, the overcurrent fault judgment includes using a fast detection algorithm to analyze the preprocessed current data and determine in real time whether there is an overcurrent condition, which is expressed as:

[0052]

[0053] Among them, I faultIndicates the result of overcurrent fault judgment. A value of 1 indicates that an overcurrent fault is detected, and a value of 0 indicates that no overcurrent fault is detected. represents the current data after Kalman filtering at time t, which is the best estimate of the current of the energy storage motor, μ t It represents the historical average value of the filtered current from time tT to t, which is used as the reference point of the current stable state. ξ is the sensitivity adjustment factor of overcurrent detection, which is used to control the threshold of overcurrent judgment. threshold is the overcurrent detection threshold; the current change rate function is expressed as:

[0054]

[0055] Among them, Δt represents the time interval; the historical average current value is expressed as:

[0056]

[0057] Where T represents the length of the history window, represents the current data after Kalman filtering at time t′; the current standard deviation is expressed as:

[0058]

[0059] When the current exceeds the overcurrent detection threshold, an overcurrent fault exists.

[0060] It should be noted that setting and adjusting the timeout protection time includes introducing the historical fluctuation of the current, the time attenuation factor and the result of the overcurrent detection, forming a dynamic adjustment model of the timeout protection time, which is expressed as:

[0061]

[0062] Among them, T threshold (t) is the dynamic timeout protection threshold at time t. When the motor running time exceeds the set safety threshold T threshold (t), automatically triggers the timeout protection command and stops the further operation of the motor, T 0 is the initial set timeout protection time, which is the protection time value preset in the system default situation. β is the dynamic adjustment coefficient that controls the influence of historical current fluctuation on the timeout protection time, reflecting the sensitivity of current fluctuation to the protection time. 0 To monitor the initial time point, I ref is the rated current value of the energy storage motor, ω is the period of fluctuation, is the phase shift, and γ is the nonlinear adjustment coefficient used to adjust the current change rate.

[0063] It should also be noted that through the dynamic adjustment mechanism, the protection parameters can be automatically adjusted according to the actual operating conditions of the motor, thereby improving the adaptability of the protection system, being able to promptly identify potential overcurrent faults and prevent the motor from being damaged due to overcurrent. The dynamic threshold adjustment reduces misjudgments and missed judgments caused by fixed thresholds, and achieves rapid response and accurate identification of motor overcurrent faults, ensuring the safe operation of the motor under complex working conditions.

[0064] S3: Through real-time monitoring of current and time data, the emergency stop command is executed immediately after the fault is identified, and the locking command is triggered after the emergency stop.

[0065] Furthermore, executing the emergency stop command includes immediately triggering a warning signal once an overcurrent fault condition is detected, stopping the motor operation, and cutting off the motor power supply through the system's built-in emergency stop command.

[0066] It should be noted that triggering the lockout instruction includes locking the motor start authority until the fault is completely eliminated. When the fault is eliminated, the operator is prompted to perform a reset operation. Resetting includes releasing the lockout state, reactivating the start authority, and performing a comprehensive self-check on the motor. After confirming that it is in a safe working state, operation is resumed.

[0067] It should also be noted that through real-time monitoring of current and time data, once a fault is identified, the emergency stop command is immediately executed, and the locking command is triggered after the emergency stop, thereby achieving immediate processing and prevention of motor faults, greatly shortening the fault response time, effectively preventing further deterioration of the fault state, protecting the motor from serious damage, and ensuring that the motor is in a safe working state before resuming operation, further improving the safety and stability of the system.

[0068] Embodiment 2 is an embodiment of the present invention, which provides a universal protection method for energy storage motors of circuit breakers. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0069] Firstly, six energy storage motors of different models were selected as test objects, namely motors A, B, C, D, E, and F. Before the test, all motors were ensured to be in normal working condition, and a real-time current data acquisition system was installed. During the test, the instantaneous current value, voltage data, temperature data, and current fluctuation amplitude signal of each motor were first collected. Subsequently, the collected data were preprocessed by using Kalman filtering combined with time attenuation factor and current fluctuation standard deviation to remove random noise and adjust the filtering strength in real time, so as to obtain a more accurate current estimation value.

[0070] After the data preprocessing is completed, the preprocessed current data is analyzed using a fast detection algorithm to determine in real time whether the motor has an overcurrent fault. During this process, the timeout protection time is set and adjusted through a dynamic threshold adjustment algorithm. The algorithm takes into account the historical fluctuations of the current, the time attenuation factor, and the results of overcurrent detection. Once an overcurrent fault is detected, the system immediately executes an emergency stop command to stop the motor and triggers a locking command to lock the motor start permission to prevent the fault from further expanding. After the fault is eliminated, the operator resets the motor and performs a full range of self-checks to ensure that the motor resumes operation in a safe working state. Refer to Table 1 to record and analyze the experimental data.

[0071] Table 1 Experimental data record table

[0072]

[0073] According to the experimental data, from the comparison between the "pre-processed current value" and the "instantaneous current value", it can be seen that the pre-processing method combining Kalman filtering with the time attenuation factor and the current fluctuation standard deviation improves the accuracy of the current data. The instantaneous current value of motor A is 10.5A, while the current value after pre-processing is 10.2A, indicating the effective removal of noise and smoothing of data. From the comparison between the "pre-processed current value" and the "instantaneous current value", it can be seen that the pre-processing method combining Kalman filtering with the time attenuation factor and the current fluctuation standard deviation improves the accuracy of the current data. The instantaneous current value of motor A is 10.5A, while the current value after pre-processing is 10.2 A, indicating the effective removal of noise and smoothing of data. In the "timeout protection time adjustment" column, the protection time of motors B and E is significantly shorter than that of other motors, indicating that the method of the present invention can quickly adjust the protection time according to the actual operating state of the motor, thereby improving the response speed and flexibility of the protection system. This dynamic adjustment mechanism is not available in the prior art and can better adapt to different operating conditions of the motor. The following conclusions can be drawn from the data analysis. The present invention is innovative and has advantages in improving the accuracy of current data, judging overcurrent faults, and adjusting timeout protection time. Compared with the prior art, the present invention can more effectively protect energy storage motors and prevent damage caused by overcurrent faults.

[0074] Example 3, reference Figure 2 , as an embodiment of the present invention, provides a universal protection system for circuit breaker energy storage motor, including a data processing module, a current analysis module, and a motor protection module.

[0075] The data processing module is used to collect real-time current data of the energy storage motor and pre-process the collected data; the current analysis module is used to analyze the current data in real time, make overcurrent fault judgments, and set and adjust the timeout protection time through a dynamic threshold adjustment algorithm; the motor protection module is used to monitor the current and time data in real time, and immediately execute the emergency stop command after identifying the fault, and trigger the locking command after the emergency stop.

[0076] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0077] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0078] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0079] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc. It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limited. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

[0080] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A universal protection method for circuit breaker energy storage motor, characterized in that: include: Collect real-time current data of energy storage motor and pre-process the collected data; Analyze current data in real time, make overcurrent fault judgment, and set and adjust the timeout protection time through dynamic threshold adjustment algorithm; Through real-time monitoring of current and time data, the emergency stop command is executed immediately after the fault is identified, and the locking command is triggered after the emergency stop.

2. The universal protection method for circuit breaker energy storage motor according to claim 1, characterized in that: The real-time current data of the energy storage motor includes the instantaneous current value of the energy storage motor, the voltage data of the motor, the temperature data of the motor and the current fluctuation amplitude signal.

3. The universal protection method for circuit breaker energy storage motor according to claim 1, characterized in that: The preprocessing includes adding a time decay factor and a standard deviation of current fluctuations on the basis of Kalman filtering, removing random noise, adjusting the filtering intensity in real time according to the volatility of current data, and reflecting the running state of the motor through the filtered current data, which is expressed as: in, is the estimated value of the energy storage motor current after filtering at time step k, is the estimated current value of the energy storage motor after filtering at time step k-1, which is the estimated current value after filtering at the previous time point, K k is the Kalman gain at time step k, I k is the actual measured current value of the energy storage motor at time step k, which is the current data directly collected from the sensor at the current moment. H is the observation matrix, which represents the proportional coefficient of the current measurement system, σ I is the standard deviation of the energy storage motor current data, indicating the amplitude of current fluctuation, θ k is the adaptive adjustment factor of time step k, λ t is the time attenuation factor at time t, reflecting the trend of current signal attenuation over time, and is used to compensate for the regulation mechanism of time correlation; The Kalman gain at time step k is expressed as: Among them, P k-1 is the error covariance matrix at time step k-1, H T represents the transpose of the observation matrix, ψ k is the noise adjustment factor at time step k, which is used to adjust the deviation caused by noise in the current estimation process. R is the observation noise covariance matrix, which represents the intensity of the measurement noise. k is the time correlation adjustment factor of time step k, reflecting the time-related error accumulation characteristics in the energy storage motor current estimation process; The updated error covariance matrix is ​​expressed as: P k =(I-K k H)P k-1 +Q+ζ k P k-1 Where Q is the process noise covariance matrix, which represents the strength of the model prediction error, and I is the unit matrix with the same dimension as P. k same.

4. The universal protection method for circuit breaker energy storage motor according to claim 2, characterized in that: The overcurrent fault judgment includes using a fast detection algorithm to analyze the preprocessed current data and judge in real time whether there is an overcurrent condition, which is expressed as: Among them, I fault Indicates the result of overcurrent fault judgment. A value of 1 indicates that an overcurrent fault is detected, and a value of 0 indicates that no overcurrent fault is detected. represents the current data after Kalman filtering at time t, which is the best estimate of the current of the energy storage motor, μ t It represents the historical average value of the filtered current from time tT to t, which is used as the reference point of the current stable state. ξ is the sensitivity adjustment factor of overcurrent detection, which is used to control the threshold of overcurrent judgment. threshold is the over-current detection threshold; The current change rate function is expressed as: Where Δt represents the time interval; The historical average current value is expressed as: Where T represents the length of the history window, represents the current data after Kalman filtering at time t′; The current standard deviation is expressed as: When the current exceeds the overcurrent detection threshold, an overcurrent fault exists.

5. The universal protection method for circuit breaker energy storage motor according to claim 3, characterized in that: The setting and adjusting of the timeout protection time includes introducing the historical fluctuation of the current, the time attenuation factor and the result of the overcurrent detection, forming a dynamic adjustment model of the timeout protection time, which is expressed as: Among them, T threshold (t) is the dynamic timeout protection threshold at time t. When the motor running time exceeds the set safety threshold T threshold (t), automatically triggers the timeout protection command and stops the further operation of the motor. T0 is the initial timeout protection time, which is the protection time value preset in the system default situation. β is the dynamic adjustment coefficient that controls the influence of historical current fluctuation on the timeout protection time, reflecting the sensitivity of current fluctuation to the protection time. t0 is the initial time point of monitoring, I ref is the rated current value of the energy storage motor, ω is the period of fluctuation, is the phase shift, and γ is the nonlinear adjustment coefficient used to adjust the current change rate.

6. The universal protection method for circuit breaker energy storage motor according to claim 5, characterized in that: The execution of the emergency stop command includes immediately triggering a warning signal once an overcurrent fault is detected, stopping the motor from running, and cutting off the power supply of the motor through the emergency stop command built into the system.

7. The universal protection method for circuit breaker energy storage motor according to claim 6, characterized in that: The triggering of the locking instruction includes locking the motor start permission until the fault is completely eliminated. When the fault is eliminated, the operator is prompted to perform a reset operation. The reset includes releasing the locking state, reactivating the start permission, and performing a comprehensive self-check on the motor to resume operation after confirming that it is in a safe working state.

8. A system using the universal protection method for circuit breaker energy storage motor according to any one of claims 1 to 7, characterized in that: Including data processing module, current analysis module, motor protection module; The data processing module is used to collect real-time current data of the energy storage motor and pre-process the collected data; The current analysis module is used to analyze current data in real time, make overcurrent fault judgments, and set and adjust the timeout protection time through a dynamic threshold adjustment algorithm; The motor protection module is used to monitor the current and time data in real time, and immediately execute an emergency stop command after identifying a fault, and trigger a locking command after the emergency stop.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the universal protection method for a circuit breaker energy storage motor according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the universal protection method for a circuit breaker energy storage motor according to any one of claims 1 to 7 are implemented.

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