Tripping characteristic analysis method based on frequency, terminal and storage medium

Abstract

The invention relates to the technical field of tripping characteristic analysis, in particular to a tripping characteristic analysis method based on frequency, a terminal and a storage medium, and the method comprises the steps: calculating effective electromagnetic energy between a moving magnet and an armature when a circuit breaker trips; constructing a frequency-electromagnetic force model based on the effective electromagnetic energy in combination with frequency change; obtaining physical attribute parameters and current frequency of a to-be-analyzed circuit breaker, and performing tripping characteristic analysis based on the frequency-electromagnetic force model; according to the method, the frequency change is considered, the frequency-electromagnetic force model is constructed, the current frequency is obtained besides the physical attribute of the circuit breaker, tripping characteristic analysis is carried out, the tripping characteristic of the circuit breaker can be accurately calculated and analyzed, and meanwhile, the influence of the frequency change is considered, so that the accuracy and reliability of a calculation result are improved.

Description

[0001] This is a divisional application of an invention patent with an application date of September 20, 2024, an application number of 202411311035.7, and a title of "Method, Terminal, and Storage Medium for Analyzing Tripping Characteristics of Circuit Breakers". Technical Field

[0002] The present invention relates to the technical field of tripping characteristic analysis, and particularly to a frequency-based tripping characteristic analysis method, terminal, and storage medium. Background Art

[0003] In modern energy storage systems, circuit breakers and their tripping characteristics play a crucial role in ensuring the safety and stability of the system. With the continuous progress of energy storage technology and the expansion of application scale, the complexity and power level of energy storage systems are also increasing. This complexity makes the protection and management of electrical equipment particularly important. As a key protection device in the power system, a circuit breaker can quickly cut off the circuit when a fault occurs in the system, preventing equipment damage and the spread of accidents. Its tripping characteristics determine the response speed and mode of the circuit breaker under different fault conditions, which is crucial for the protection effect of the system.

[0004] The tripping characteristics of a circuit breaker include two mechanisms: thermal tripping and magnetic tripping. Thermal tripping mainly deals with long-term overload situations and realizes circuit breakage through the deformation of a bimetallic strip, while magnetic tripping deals with short circuits or large current transients and quickly disconnects the circuit through the action of an electromagnetic coil. These characteristics ensure that the energy storage system can be protected in a timely and effective manner under different types of faults. In an energy storage system, a circuit breaker can not only protect core components such as battery modules and inverters but also prevent safety hazards caused by short circuits, overloads, etc., ensuring the reliable operation of the entire power grid. In addition, the circuit breaker also provides a reliable switching function during daily operations, facilitating system maintenance and repair and improving operation efficiency. Therefore, the application of circuit breakers and their tripping characteristics in energy storage systems is of indispensable importance for ensuring system safety, improving operation reliability, and maintaining power grid stability.

[0005] There are some deficiencies in the current calculation of circuit breaker tripping characteristics. Traditional methods do not consider the influence brought by frequency changes, resulting in differences in the analysis of circuit breaker tripping characteristics in practical applications. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: to provide a frequency-based tripping characteristic analysis method, terminal, and storage medium that can accurately calculate and analyze the tripping characteristics of a circuit breaker, while considering the influence of frequency changes to improve the accuracy and reliability of the calculation results.

[0007] To solve the above technical problem, the technical solution adopted by the present invention is: A method for analyzing the tripping characteristics of a circuit breaker, comprising the steps of: S1. Calculate the effective electromagnetic energy between the moving magnet and the armature when the circuit breaker trips; S2. Based on the effective electromagnetic energy and combined with the frequency change, construct a frequency-electromagnetic force model: ; wherein, A represents the cross-sectional area between the moving magnet and the armature, B represents the magnetic induction intensity, represents the eddy current loss coefficient, represents the hysteresis loss coefficient, represents the frequency, represents the specific gravity of the iron sheet, represents the vacuum permeability; S3. Obtain the physical property parameters and current frequency of the circuit breaker to be analyzed, and perform tripping characteristic analysis based on the frequency-electromagnetic force model.

[0008] A tripping characteristic analysis method based on frequency, comprising the steps of: S1. Calculate the effective electromagnetic energy between the moving magnet and the armature when the circuit breaker trips: S2. Based on the partial derivative of the effective electromagnetic energy with respect to the gap between the moving magnet and the armature, and combined with the frequency change, construct a frequency-electromagnetic force model; S3. Obtain the physical property parameters and current frequency of the circuit breaker to be analyzed, and perform tripping characteristic analysis based on the frequency-electromagnetic force model; Step S3 includes the steps of: Perform time integration calculation according to the frequency-electromagnetic force model to obtain the impulse equation of the circuit breaker; Input the corresponding physical property parameters of the circuit breaker as initial parameters; Input the expected tripping time of the circuit breaker as the basis for analyzing the tripping characteristics of the circuit breaker; Set a specific calculation step size to solve the impulse equation, analyze the tripping time under different currents, and thus obtain the time-current curve.

[0009] To solve the above technical problems, another technical solution adopted by the present invention is: A terminal for analyzing the tripping characteristics of a circuit breaker, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps in the above-mentioned method for analyzing the tripping characteristics of a circuit breaker are implemented.

[0010] A terminal for analyzing tripping characteristics based on frequency includes a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in the above-mentioned method for analyzing tripping characteristics based on frequency are implemented.

[0011] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A storage medium stores a computer program, and when the computer program is executed, the steps in the above-mentioned method for analyzing the tripping characteristics of a circuit breaker are implemented.

[0012] A storage medium stores a computer program, and when the computer program is executed, the steps in the above-mentioned method for analyzing tripping characteristics based on frequency are implemented.

[0013] The beneficial effect of the present invention lies in that: the method, terminal, and storage medium for analyzing tripping characteristics based on frequency of the present invention consider frequency changes, construct a frequency-electromagnetic force model, obtain the current frequency in addition to the physical properties of the circuit breaker to perform tripping characteristic analysis, can accurately calculate and analyze the tripping characteristics of the circuit breaker, and at the same time consider the influence of frequency changes to improve the accuracy and reliability of the calculation results. Description of the Drawings

[0014] Figure 1 It is a flowchart of a method for analyzing the tripping characteristics of a circuit breaker according to an embodiment of the present invention; Figure 2 It is a calculation flowchart of a method for analyzing the tripping characteristics of a circuit breaker according to an embodiment of the present invention; Figure 3 It is a structural diagram of a terminal for analyzing the tripping characteristics of a circuit breaker according to an embodiment of the present invention; Label Description: 1. A terminal for analyzing the tripping characteristics of a circuit breaker; 2. Processor; 3. Memory. Detailed Embodiment

[0015] To describe the technical content, achieved objectives, and effects of the present invention in detail, the following is described in conjunction with the embodiments and accompanied by the drawings.

[0016] Please refer to Figure 1 and Figure 2 , a method for analyzing the tripping characteristics of a circuit breaker includes the steps of: S1. Calculate the effective electromagnetic energy between the moving magnet and the armature when the circuit breaker trips; S2. Based on the effective electromagnetic energy and combined with frequency changes, construct a frequency-electromagnetic force model: ; Among them, A represents the cross-sectional area between the moving magnet and the armature, and B represents the magnetic induction intensity. represents the eddy current loss coefficient. represents the hysteresis loss coefficient. represents the frequency. represents the specific gravity of the iron sheet. represents the permeability of free space; S3. Obtain the physical property parameters and current frequency of the circuit breaker to be analyzed, and perform tripping characteristic analysis based on the frequency-electromagnetic force model.

[0017] As can be seen from the above description, the beneficial effects of the present invention are as follows: A method for analyzing the tripping characteristics of a circuit breaker according to the present invention considers the frequency change, constructs a frequency-electromagnetic force model, obtains the current frequency in addition to the physical properties of the circuit breaker to perform tripping characteristic analysis, can accurately calculate and analyze the tripping characteristics of the circuit breaker, and at the same time considers the influence of frequency change to improve the accuracy and reliability of the calculation results.

[0018] Further, the calculation of the effective electromagnetic energy is specifically as follows: According to the total electromagnetic energy between the moving magnet and the armature when the circuit breaker trips , introduce the hysteresis loss based on the frequency and the eddy current loss information, and the effective electromagnetic energy is: .

[0019] As can be seen from the above description, considering the hysteresis loss and the eddy current loss, the effective electromagnetic energy is calculated based on the total electromagnetic energy.

[0020] Furthermore, the calculation of the hysteresis loss is: ; where B represents the magnetic induction intensity, represents the hysteresis loss coefficient, represents the frequency, V represents the volume between the electromagnet and the armature, represents the specific gravity of the iron sheet.

[0021] As can be seen from the above description, the hysteresis loss is calculated in the above manner.

[0022] Furthermore, the calculation of the eddy current loss is: ; where B represents the magnetic induction intensity, represents the eddy current loss coefficient, represents the frequency, V represents the volume between the electromagnet and the armature, Indicates the specific gravity of the iron sheet.

[0023] As can be seen from the above description, the eddy current loss is calculated in the above manner.

[0024] Furthermore, the total electromagnetic energy between the moving magnet and the armature when the circuit breaker trips is calculated as: ; where B represents the magnetic induction intensity, V represents the volume between the electromagnet and the armature, represents the vacuum permeability.

[0025] As can be seen from the above description, the total electromagnetic energy between the moving magnet and the armature when the circuit breaker trips is calculated in the above manner.

[0026] Furthermore, the construction of the frequency-electromagnetic force model is based on the partial derivative of the effective electromagnetic energy with respect to the gap between the moving magnet and the armature: ; where represents the gap between the moving magnet and the armature.

[0027] As can be seen from the above description, the construction of the frequency-electromagnetic force model is based on the partial derivative of the effective electromagnetic energy with respect to the gap between the moving magnet and the armature.

[0028] Furthermore, step S3 includes the steps of: If the frequency is fixed, substitute the current frequency into the frequency-electromagnetic force model to calculate the electromagnetic force data; Perform a time integral on the electromagnetic force to obtain the impulse equation of the circuit breaker, and solve the impulse equation; Perform subsequent analysis based on the calculation results.

[0029] As can be seen from the above description, when the frequency does not change, substituting the specific frequency into the equation can obtain the electromagnetic force under the corresponding conditions.

[0030] Furthermore, step S3 includes the steps of: If the frequency changes with time, obtain the frequency-time function and substitute it into the frequency-electromagnetic force model; Determine the electromagnetic force data according to the frequency-electromagnetic force model, perform a time integral on the electromagnetic force to obtain the impulse equation of the circuit breaker, and solve the impulse equation; Perform subsequent analysis based on the calculation results.

[0031] As can be seen from the above description, when the frequency changes with time, substitute the specific frequency-time function into the frequency-electromagnetic force model for solution.

[0032] Please refer to Figure 3, A terminal for analyzing the tripping characteristics of a circuit breaker, including a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps in the method for analyzing the tripping characteristics of a circuit breaker described above.

[0033] As can be seen from the above description, the beneficial effects of the present invention are as follows: The terminal for analyzing the tripping characteristics of a circuit breaker according to the present invention considers frequency changes, constructs a frequency-electromagnetic force model, obtains the current frequency in addition to the physical properties of the circuit breaker for tripping characteristic analysis, can accurately calculate and analyze the tripping characteristics of the circuit breaker, and at the same time considers the influence of frequency changes to improve the accuracy and reliability of the calculation results.

[0034] A storage medium, on which a computer program is stored. When the computer program is executed, it implements the steps in the method for analyzing the tripping characteristics of a circuit breaker described above.

[0035] As can be seen from the above description, the beneficial effects of the present invention are as follows: The storage medium according to the present invention considers frequency changes, constructs a frequency-electromagnetic force model, obtains the current frequency in addition to the physical properties of the circuit breaker for tripping characteristic analysis, can accurately calculate and analyze the tripping characteristics of the circuit breaker, and at the same time considers the influence of frequency changes to improve the accuracy and reliability of the calculation results.

[0036] The method, terminal, and storage medium for analyzing the tripping characteristics of a circuit breaker according to the present invention are applicable to the analysis of the tripping characteristics of a circuit breaker.

[0037] Please refer to Figure 1 , Example 1 of the present invention is as follows: A method for analyzing the tripping characteristics of a circuit breaker, including the steps of: S1. Calculate the effective electromagnetic energy between the moving magnet and the armature when the circuit breaker trips; The specific calculation of the effective electromagnetic energy is as follows: According to the total electromagnetic energy between the moving magnet and the armature when the circuit breaker trips , introduce the magnetic hysteresis loss and eddy current loss information, and the effective electromagnetic energy is: ; The calculation of the magnetic hysteresis loss is: ; where B represents the magnetic induction intensity, represents the magnetic hysteresis loss coefficient, represents the frequency, V represents the volume between the electromagnet and the armature, Indicates the specific gravity of the iron sheet; The eddy current loss is calculated as: ; where B represents the magnetic induction intensity, represents the eddy current loss coefficient, represents the frequency, V represents the volume between the electromagnet and the armature, indicates the specific gravity of the iron sheet; The total electromagnetic energy between the moving magnet and the armature when the circuit breaker trips is calculated as: ; where B represents the magnetic induction intensity, V represents the volume between the electromagnet and the armature, represents the vacuum permeability.

[0038] In this embodiment, it can be obtained that: .

[0039] S2. Based on the effective electromagnetic energy and combined with the frequency change, construct a frequency - electromagnetic force model: ; where A represents the cross - sectional area between the moving magnet and the armature, B represents the magnetic induction intensity, represents the eddy current loss coefficient, represents the hysteresis loss coefficient, represents the frequency, represents the specific gravity of the iron sheet, represents the vacuum permeability; The construction of the frequency - electromagnetic force model is based on the partial derivative of the effective electromagnetic energy with respect to the gap between the moving magnet and the armature: ; where, represents the gap between the moving magnet and the armature.

[0040] In this embodiment, the electromagnetic force is the partial derivative of the effective electromagnetic energy with respect to the gap between the moving magnet and the armature, that is: ; where: ; Then there is: ; This is the frequency - electromagnetic force model considering the influence of frequency.

[0041] where A represents the cross - sectional area between the moving magnet and the armature.

[0042] S3. Obtain physical property parameters and current frequency of the circuit breaker to be analyzed, and perform tripping characteristic analysis based on the frequency-electromagnetic force model.

[0043] Step S3 includes the steps of: If the frequency is fixed, the current frequency is substituted into the frequency-electromagnetic force model to calculate the electromagnetic force data; Performing time integration on the electromagnetic force to obtain an impulse equation of the circuit breaker, and performing calculation and solution on the impulse equation; Conduct subsequent analysis based on the calculation results.

[0044] In this embodiment, the frequency-electromagnetic force model is determined by the specific circuit breaker project working conditions. When the frequency does not change, the specific frequency is substituted into the equation to obtain the electromagnetic force under the corresponding conditions.

[0045] The tripping action of the circuit breaker requires a certain impulse, which is the integral solution of the electromagnetic force over time. After the electromagnetic force is obtained, the required tripping time can be solved through the impulse equation to reflect the tripping characteristics.

[0046] Please refer to Figure 1 and Figure 2 , Embodiment 2 of the present invention is: A method for analyzing the tripping characteristics of a circuit breaker, which differs from the first embodiment in that step S3 includes the following steps: If the frequency changes with time, a frequency-time function is obtained and substituted into the frequency-electromagnetic force model, and time integration is performed to obtain an impulse equation of the circuit breaker, and the impulse equation is solved and calculated; Conduct subsequent analysis based on the calculation results.

[0047] In this embodiment, when the frequency changes with time, the specific frequency-time function is brought into the frequency-electromagnetic force model for solution. Considering the frequency change, it is a function of time, that is, , combined with the above frequency-electromagnetic force model, we can know the magnitude of the electromagnetic force at a specific frequency and time. Then, by integrating the electromagnetic force over time, we can get the magnitude of its impulse within an action time: .

[0048] By solving this equation, the tripping characteristics of the circuit breaker can be analyzed.

[0049] The tripping action of the circuit breaker requires a certain impulse. By solving this equation, we can know the tripping time under different currents, and thus obtain the time-current curve, that is, the tripping characteristics of the circuit breaker.

[0050] Enter the corresponding physical property parameters of the circuit breaker ( ,A, , , , , ) as the initial parameter.

[0051] The expected tripping time of the input circuit breaker is used as the basis for analyzing the tripping characteristics of the circuit breaker.

[0052] Set a specific calculation step size to solve.

[0053] Calculate and solve, and output the solution result.

[0054] Please refer to Figure 3 , Example 3 of the present invention is: A terminal 1 for analyzing the tripping characteristics of a circuit breaker, including a processor 2, a memory 3, and a computer program stored in the memory 3 and executable on the processor 2. When the processor 2 executes the computer program, it implements the steps in the method for analyzing the tripping characteristics of a circuit breaker described in the above Example 1 or 2.

[0055] Example 4 of the present invention is: A storage medium, on which a computer program is stored. When the computer program is executed, it implements the steps in the method for analyzing the tripping characteristics of a circuit breaker described in the above Example 1 or 2.

[0056] In summary, the method, terminal, and storage medium for analyzing the tripping characteristics of a circuit breaker provided by the present invention consider frequency changes, construct a frequency-electromagnetic force model, obtain the current frequency in addition to the physical properties of the circuit breaker to perform tripping characteristic analysis, can accurately calculate and analyze the tripping characteristics of the circuit breaker, and at the same time consider the influence of frequency changes to improve the accuracy and reliability of the calculation results, effectively predict the tripping time, help optimize the design and operating parameters of the circuit breaker, and improve the safety and stability of the power system.

[0057] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent transformation made using the content of the specification and drawings of the present invention, or directly or indirectly applied in the related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A frequency-based tripping characteristic analysis method, characterized in that: Includes steps: S1. Calculate the effective electromagnetic energy between the moving magnet and the armature when the circuit breaker is tripped: S2. constructing a frequency-electromagnetic force model based on the partial derivative of the effective electromagnetic energy with respect to the gap between the moving magnet and the armature and combining the frequency change; S3, obtaining physical property parameters and current frequency of the circuit breaker to be analyzed, and performing tripping characteristic analysis based on the frequency-electromagnetic force model; Step S3 includes the steps of: Perform time integration calculation according to the frequency-electromagnetic force model to obtain the impulse equation of the circuit breaker; Input corresponding physical property parameters of the circuit breaker as initial parameters; The expected tripping time of the input circuit breaker is used as the basis for analyzing the circuit breaker tripping characteristics; A specific calculation step is set to solve the impulse equation, and the tripping time under different currents is analyzed to obtain a time-current curve.

2. A frequency-based tripping characteristic analysis method according to claim 1, characterized in that: The calculation of the effective electromagnetic energy is specifically as follows: According to the total electromagnetic energy between the moving magnet and the armature when the circuit breaker is tripped , introducing frequency-dependent hysteresis losses and eddy current losses Information, effective electromagnetic energy for: 。 3. A frequency-based tripping characteristic analysis method according to claim 2, characterized in that: The hysteresis loss The calculation is: ； Where B represents the magnetic induction intensity, represents the hysteresis loss coefficient, represents the frequency, V represents the volume between the electromagnet and the armature, Indicates the specific gravity of iron sheet.

4. A frequency-based tripping characteristic analysis method according to claim 2, characterized in that: The eddy current loss The calculation is: ； Where B represents the magnetic induction intensity, represents the eddy current loss coefficient, represents the frequency, V represents the volume between the electromagnet and the armature, Indicates the specific gravity of iron sheet.

5. A frequency-based tripping characteristic analysis method according to claim 2, characterized in that: The total electromagnetic energy between the moving magnet and the armature when the circuit breaker is tripped The calculation is: ； Among them, B represents the magnetic induction intensity, V represents the volume between the electromagnet and the armature, Represents the magnetic permeability of vacuum.

6. A frequency-based tripping characteristic analysis method according to claim 2, characterized in that: The construction of the frequency-electromagnetic force model is based on the partial derivative of the effective electromagnetic energy with respect to the gap between the moving magnet and the armature: ； Where F represents the electromagnetic force, Indicates the gap between the moving magnet and the armature.

7. A frequency-based tripping characteristic analysis method according to claim 1, characterized in that: Performing time integration calculation according to the frequency-electromagnetic force model to obtain the impulse equation of the circuit breaker includes the following steps: If the frequency is fixed, the current frequency is substituted into the frequency-electromagnetic force model, the electromagnetic force data is calculated, and the electromagnetic force is time-integrated to obtain the impulse equation of the circuit breaker.

8. A frequency-based tripping characteristic analysis method according to claim 1, characterized in that: Performing time integration calculation according to the frequency-electromagnetic force model to obtain the impulse equation of the circuit breaker includes the following steps: If the frequency changes with time, a frequency-time function is obtained and substituted into the frequency-electromagnetic force model, electromagnetic force data is determined according to the frequency-electromagnetic force model, and the electromagnetic force is time-integrated to obtain the impulse equation of the circuit breaker.

9. A terminal for frequency-based tripping characteristic analysis, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps in the frequency-based tripping characteristic analysis method described in any one of claims 1 to 8 are implemented.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the steps in the frequency-based tripping characteristic analysis method described in any one of claims 1 to 8 are implemented.

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