A method, terminal and storage medium for analyzing tripping characteristics of circuit breaker

Abstract

The present invention relates to the technical field of tripping characteristic analysis, and in particular to a method, a terminal and a storage medium for analyzing the tripping characteristic of a circuit breaker, which calculate the effective electromagnetic energy between a moving magnet and an armature when the circuit breaker is tripped; based on the effective electromagnetic energy, a frequency-electromagnetic force model is constructed in combination with frequency change; physical property parameters and current frequency of the circuit breaker to be analyzed are obtained, and the tripping characteristic analysis is performed based on the frequency-electromagnetic force model; the present invention considers the frequency change, constructs the frequency-electromagnetic force model, obtains the current frequency in addition to the physical property of the circuit breaker, so as to perform the tripping characteristic analysis, can accurately calculate and analyze the tripping characteristic of the circuit breaker, and takes into account the influence of the frequency change to improve the accuracy and reliability of the calculation result.

Description

Technical Field

[0001] The present invention relates to the technical field of tripping characteristic analysis, and in particular to a method, a terminal and a storage medium for analyzing the tripping characteristics of a circuit breaker. Background Art

[0002] In modern energy storage systems, circuit breakers and their tripping characteristics play a vital role in ensuring the safety and stability of the system. With the continuous advancement of energy storage technology and the expansion of its 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, the circuit breaker can quickly cut off the circuit when a system fault occurs to prevent equipment damage and the spread of accidents. Its tripping characteristics determine the speed and method of the circuit breaker's response under different fault conditions, which is crucial to the protection effect of the system.

[0003] The tripping characteristics of the circuit breaker include two mechanisms: thermal tripping and magnetic tripping. Thermal tripping mainly responds to long-term overload conditions and achieves circuit breaking through the deformation of the bimetallic strip, while magnetic tripping responds to short circuits or large current transients and quickly disconnects the circuit through the action of the electromagnetic coil. These characteristics ensure that the energy storage system can be protected promptly and effectively under different types of faults. In the energy storage system, the circuit breaker can not only protect core components such as battery modules and inverters, but also prevent safety hazards caused by faults such as short circuits and overloads, ensuring the reliable operation of the entire power grid. In addition, the circuit breaker also provides a reliable switching function in daily operation, which facilitates the maintenance and overhaul of the system and improves operating efficiency. Therefore, the application of circuit breakers and their tripping characteristics in energy storage systems is of indispensable importance for ensuring system safety, improving operational reliability and maintaining power grid stability.

[0004] There are some shortcomings in the current calculation of circuit breaker tripping characteristics. The traditional method does not consider the impact of frequency changes, which makes the analysis of circuit breaker tripping characteristics different in practical applications. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method, a terminal and a storage medium for analyzing the tripping characteristics of a circuit breaker, which can accurately calculate and analyze the tripping characteristics of the circuit breaker while taking into account the influence of frequency changes to improve the accuracy and reliability of the calculation results.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A method for analyzing a circuit breaker tripping characteristic comprises the steps of:

[0008] S1. Calculate the effective electromagnetic energy between the moving magnet and the armature when the circuit breaker is tripped;

[0009] S2. Based on the effective electromagnetic energy and combined with the frequency change, a frequency-electromagnetic force model is constructed:

[0010] ;

[0011] Among them, 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, Indicates frequency, Indicates the specific gravity of iron sheet, represents the vacuum permeability;

[0012] 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.

[0013] In order to solve the above technical problems, another technical solution adopted by the present invention is:

[0014] A terminal for analyzing the tripping characteristics of a circuit breaker comprises 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 the tripping characteristics of a circuit breaker are implemented.

[0015] In order to solve the above technical problems, another technical solution adopted by the present invention is:

[0016] A storage medium stores a computer program, which implements the steps in the above-mentioned method for analyzing the tripping characteristics of a circuit breaker when executed.

[0017] The beneficial effects of the present invention are as follows: a method, terminal and storage medium for analyzing the tripping characteristics of a circuit breaker of the present invention consider frequency changes, construct a frequency-electromagnetic force model, obtain current frequency in addition to the physical properties of the circuit breaker to perform tripping characteristic analysis, and can accurately calculate and analyze the tripping characteristics of the circuit breaker while taking into account the influence of frequency changes to improve the accuracy and reliability of the calculation results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A flow chart of a method for analyzing a circuit breaker tripping characteristic according to an embodiment of the present invention;

[0019] Figure 2 A calculation flow chart of a method for analyzing a circuit breaker tripping characteristic according to an embodiment of the present invention;

[0020] Figure 3 A structural diagram of a terminal for analyzing the tripping characteristics of a circuit breaker according to an embodiment of the present invention;

[0021] Description of labels:

[0022] 1. A terminal for analyzing the tripping characteristics of a circuit breaker; 2. A processor; 3. A memory. DETAILED DESCRIPTION

[0023] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0024] Please refer to Figure 1 as well as Figure 2 , a method for analyzing the tripping characteristics of a circuit breaker, comprising the steps of:

[0025] S1. Calculate the effective electromagnetic energy between the moving magnet and the armature when the circuit breaker is tripped;

[0026] S2. Based on the effective electromagnetic energy and combined with the frequency change, a frequency-electromagnetic force model is constructed:

[0027] ;

[0028] Among them, 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, Indicates frequency, Indicates the specific gravity of iron sheet, represents the vacuum permeability;

[0029] 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.

[0030] From the above description, it can be seen that the beneficial effects of the present invention are: a method for analyzing the tripping characteristics of a circuit breaker of 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, so as to perform tripping characteristic analysis, and can accurately calculate and analyze the tripping characteristics of the circuit breaker, while taking into account the influence of frequency changes to improve the accuracy and reliability of the calculation results.

[0031] Furthermore, the calculation of the effective electromagnetic energy is specifically as follows:

[0032] 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:

[0033] .

[0034] From the above description, it can be seen that the effective electromagnetic energy is calculated based on the total electromagnetic energy by considering the hysteresis loss and eddy current loss.

[0035] Furthermore, the hysteresis loss The calculation is:

[0036] ;

[0037] 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.

[0038] It can be seen from the above description that the hysteresis loss is calculated in the above manner.

[0039] Furthermore, the eddy current loss The calculation is:

[0040] ;

[0041] 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.

[0042] It can be seen from the above description that the eddy current loss is calculated in the above manner.

[0043] Furthermore, the total electromagnetic energy between the moving magnet and the armature when the circuit breaker is tripped The calculation is:

[0044] ;

[0045] Among them, B represents the magnetic induction intensity, V represents the volume between the electromagnet and the armature, Represents the magnetic permeability of vacuum.

[0046] It can be seen from the above description that the total electromagnetic energy between the moving magnet and the armature when the circuit breaker is tripped is calculated in the above manner.

[0047] 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:

[0048] ;

[0049] in, Indicates the gap between the moving magnet and the armature.

[0050] It can be seen from the above description 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.

[0051] Further, step S3 comprises the steps of:

[0052] If the frequency is fixed, the current frequency is substituted into the frequency-electromagnetic force model to calculate the electromagnetic force data;

[0053] 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;

[0054] Conduct subsequent analysis based on the calculation results.

[0055] From the above description, it can be seen that when the frequency does not change, the electromagnetic force under the corresponding conditions can be obtained by substituting the specific frequency into the equation.

[0056] Further, step S3 comprises the steps of:

[0057] If the frequency changes with time, a frequency-time function is obtained and substituted into the frequency-electromagnetic force model;

[0058] Determine electromagnetic force data according to the frequency-electromagnetic force model, perform time integration on the electromagnetic force, obtain an impulse equation for the circuit breaker, and solve and calculate the impulse equation;

[0059] Conduct subsequent analysis based on the calculation results.

[0060] From the above description, it can be seen that when the frequency changes with time, the specific frequency-time function is brought into the frequency-electromagnetic force model for solution.

[0061] Please refer to Figure 3 A terminal for analyzing the tripping characteristics of a circuit breaker comprises 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 method for analyzing the tripping characteristics of a circuit breaker described above are implemented.

[0062] From the above description, it can be seen that the beneficial effects of the present invention are: a terminal for analyzing the tripping characteristics of a circuit breaker of 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 to perform tripping characteristic analysis, and can accurately calculate and analyze the tripping characteristics of the circuit breaker, while taking into account the influence of frequency changes to improve the accuracy and reliability of the calculation results.

[0063] A storage medium stores a computer program, which implements the steps in the above-mentioned method for analyzing the tripping characteristics of a circuit breaker when executed.

[0064] From the above description, it can be seen that the beneficial effects of the present invention are: a storage medium of the present invention takes frequency changes into consideration, constructs a frequency-electromagnetic force model, obtains current frequency in addition to the physical properties of the circuit breaker to perform tripping characteristic analysis, and can accurately calculate and analyze the tripping characteristics of the circuit breaker while taking into account the influence of frequency changes to improve the accuracy and reliability of the calculation results.

[0065] A method, terminal and storage medium for analyzing the tripping characteristics of a circuit breaker of the present invention are suitable for analyzing the tripping characteristics of a circuit breaker.

[0066] Please refer to Figure 1 , Embodiment 1 of the present invention is:

[0067] A method for analyzing a circuit breaker tripping characteristic comprises the steps of:

[0068] S1. Calculate the effective electromagnetic energy between the moving magnet and the armature when the circuit breaker is tripped;

[0069] The calculation of the effective electromagnetic energy is specifically as follows:

[0070] 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:

[0071] ;

[0072] The hysteresis loss The calculation is:

[0073] ;

[0074] 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;

[0075] The eddy current loss The calculation is:

[0076] ;

[0077] 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;

[0078] The total electromagnetic energy between the moving magnet and the armature when the circuit breaker is tripped The calculation is:

[0079] ;

[0080] Among them, B represents the magnetic induction intensity, V represents the volume between the electromagnet and the armature, Represents the magnetic permeability of vacuum.

[0081] In this embodiment, it can be obtained:

[0082] .

[0083] S2. Based on the effective electromagnetic energy and combined with the frequency change, a frequency-electromagnetic force model is constructed:

[0084] ;

[0085] Among them, 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, Indicates frequency, Indicates the specific gravity of iron sheet, represents the vacuum permeability;

[0086] 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:

[0087] ;

[0088] in, Indicates the gap between the moving magnet and the armature.

[0089] 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:

[0090] ;

[0091] in:

[0092] ;

[0093] Then we have:

[0094] ;

[0095] This is the frequency-electromagnetic force model that takes the frequency effect into account.

[0096] Wherein, A represents the cross-sectional area between the moving magnet and the armature.

[0097] 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.

[0098] Step S3 includes the steps of:

[0099] If the frequency is fixed, the current frequency is substituted into the frequency-electromagnetic force model to calculate the electromagnetic force data;

[0100] 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;

[0101] Conduct subsequent analysis based on the calculation results.

[0102] 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.

[0103] 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.

[0104] Please refer to Figure 1 and Figure 2 , Embodiment 2 of the present invention is:

[0105] 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:

[0106] 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;

[0107] Conduct subsequent analysis based on the calculation results.

[0108] 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:

[0109] .

[0110] By solving this equation, the tripping characteristics of the circuit breaker can be analyzed.

[0111] 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.

[0112] Enter the corresponding physical property parameters of the circuit breaker ( ,A, , , , , ) as initial parameters.

[0113] The expected tripping time of the input circuit breaker is used as the basis for analyzing the circuit breaker tripping characteristics.

[0114] Set a specific calculation step size to solve the problem.

[0115] Calculate the solution and output the solution result.

[0116] Please refer to Figure 3 , Embodiment 3 of the present invention is:

[0117] A terminal 1 for analyzing a circuit breaker tripping characteristic comprises 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, the steps in the method for analyzing a circuit breaker tripping characteristic described in the first or second embodiment above are implemented.

[0118] The fourth embodiment of the present invention is:

[0119] A storage medium stores a computer program thereon, wherein when the computer program is executed, the steps in the method for analyzing a circuit breaker tripping characteristic described in the first or second embodiment above are implemented.

[0120] In summary, the present invention provides a method, terminal and storage medium for analyzing the tripping characteristics of a circuit breaker, which take frequency changes into consideration, construct a frequency-electromagnetic force model, and simultaneously obtain the current frequency in addition to the physical properties of the circuit breaker to perform tripping characteristic analysis. The method can accurately calculate and analyze the tripping characteristics of the circuit breaker, while taking into account 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.

[0121] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for analyzing the tripping characteristics of a circuit breaker, characterized in that: Includes steps: S1. Calculate the effective electromagnetic energy between the moving magnet and the armature when the circuit breaker is tripped; 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: ； The total electromagnetic energy between the moving magnet and the armature when the circuit breaker is tripped The calculation is: ； The hysteresis loss The calculation is: ； The eddy current loss The calculation is: ； in, represents the vacuum permeability, represents the eddy current loss coefficient, 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; The effective electromagnetic energy It can be expressed as: ； S2. Based on the effective electromagnetic energy and the frequency change, a frequency-electromagnetic force model is constructed. 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, x g Indicates the gap between the moving magnet and the armature; And there are: ； Then the frequency-electromagnetic force model: ； Among them, 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, Indicates frequency, Indicates the specific gravity of iron sheet, represents the magnetic permeability of vacuum; 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: If the frequency is fixed, the current frequency is substituted into the frequency-electromagnetic force model to calculate the electromagnetic force data; the electromagnetic force is time-integrated to obtain the impulse equation of the circuit breaker, and the impulse equation is solved and calculated; 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, and the impulse equation is solved and calculated; Conduct subsequent analysis based on the calculation results.

2. 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, characterized in that: When the processor executes the computer program, the steps in the method for analyzing the tripping characteristics of a circuit breaker as claimed in claim 1 are implemented.

3. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the steps in the method for analyzing the tripping characteristics of a circuit breaker as claimed in claim 1 are implemented.

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