Method and device for determining cooling capacity of circuit breaker and computer equipment

Abstract

The invention relates to a method and device for determining the cooling capacity of a circuit breaker and computer equipment. The method comprises the steps that arc plasma is segmented at equal intervals in the axial direction of the arc plasma generated in an arc extinguish chamber of the circuit breaker, and a plurality of arc slices are obtained; and for each arc slice, determining the cooling capacity of the corresponding spatial position of the arc slice in the arc extinguish chamber according to the target isothermal surface with the temperature being the preset temperature in the arc slice. By adopting the method, the cooling capacity of each spatial position in the arc extinguish chamber of the circuit breaker can be determined, so that refined description and spatial quantitative evaluation of the cooling capacity of the circuit breaker can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breakers, in particular to a method and device for determining the cooling capacity of a circuit breaker and a computer device. BACKGROUND

[0002] With the development of circuit breaker technology, the research on the cooling capacity of circuit breakers, such as internal airflow cooling capacity, has gradually deepened. Generally speaking, the cooling capacity of a circuit breaker refers to its ability to transfer the heat generated inside to the external environment to maintain the temperature of the device within a safe range when the circuit is running or breaking.

[0003] In the traditional technology, the research on the cooling capacity of circuit breakers has significant cognitive uncertainty and technical limitations, mainly relying on macroscopic experiments and simplified steady-state models, which makes it difficult to accurately describe the cooling capacity of each spatial position of the circuit breaker. SUMMARY

[0004] Therefore, it is necessary to provide a method and device for determining the cooling capacity of a circuit breaker and a computer device to determine the cooling capacity of each spatial position in the arc chamber of the circuit breaker, so as to realize the fine description and spatial quantitative evaluation of the cooling capacity of the circuit breaker.

[0005] In a first aspect, the present application provides a method for determining the cooling capacity of a circuit breaker, comprising:

[0006] The arc plasma generated in the arc chamber of the circuit breaker is equally spaced in the axial direction to obtain a plurality of arc slices;

[0007] For each arc slice, the cooling capacity of the corresponding spatial position in the arc chamber is determined according to the target isothermal surface with a preset temperature in the arc slice.

[0008] In one embodiment, the cooling capacity of the corresponding spatial position in the arc chamber is determined according to the target isothermal surface with a preset temperature in the arc slice, comprising:

[0009] The first energy carried by the cooling gas corresponding to the arc slice is determined according to the target isothermal surface with a preset temperature in the arc slice; and,

[0010] The second energy carried by the arc slice is determined according to the arc voltage and arc current of the arc slice;

[0011] The cooling capacity of the corresponding spatial position in the arc chamber is determined according to the ratio of the first energy and the second energy.

[0012] In one embodiment, determining the first energy carried by the cooling gas corresponding to the arc slice based on a target isothermal surface in the arc slice at a preset temperature includes:

[0013] Determine the target isothermal surface in the arc slice with the preset temperature;

[0014] A first isothermal surface is defined along a first direction and at a first distance from the target isothermal surface, and a second isothermal surface is defined along a second direction and at a second distance from the target isothermal surface; wherein the first direction and the second direction are opposite directions, and the first direction or the second direction is the direction from the target isothermal surface to the center of the arc slice;

[0015] The first energy carried by the cooling gas corresponding to the arc slice is determined based on the temperature difference between the temperature of the first isothermal surface and the temperature of the second isothermal surface.

[0016] In one embodiment, determining the first energy carried by the cooling gas corresponding to the arc slice based on the temperature difference between the temperatures of the first isothermal surface and the second isothermal surface includes:

[0017] Determine the temperature difference between the temperatures of the first isotherm and the second isotherm; and,

[0018] Determine the gas parameters of the cooling gas corresponding to the electric arc slice; the gas parameters include gas density, gas specific heat capacity at constant pressure, and gas flow rate.

[0019] Based on the temperature difference and gas parameters, the first energy carried by the cooling gas corresponding to the arc slice is determined.

[0020] In one embodiment, the method further includes:

[0021] Based on the cooling capacity of each spatial location within the arc-extinguishing chamber, the weak points within the arc-extinguishing chamber are determined.

[0022] Based on the distribution of weak points, determine the optimal solution for the circuit breaker.

[0023] In one embodiment, the weak points within the arc-extinguishing chamber are determined based on the cooling capacity of each spatial location within the chamber, including:

[0024] Identify the spatial locations within the arc-extinguishing chamber where the cooling capacity is less than the preset cooling capacity, in order to determine the weak points within the arc-extinguishing chamber; or,

[0025] By sorting the spatial locations within the arc-extinguishing chamber according to their cooling capacity from smallest to largest, the spatial locations ranked first by a specified number of positions are determined to identify the weak points within the arc-extinguishing chamber.

[0026] Secondly, this application also provides a device for determining the cooling capacity of a circuit breaker, comprising:

[0027] The arc cutting module is used to cut the arc plasma generated in the arc extinguishing chamber of the circuit breaker into multiple arc slices at equal intervals along the axial direction.

[0028] The capacity determination module is used to determine the cooling capacity of the corresponding spatial location of the arc slice in the arc extinguishing chamber for each arc slice, based on the target isothermal surface in the arc slice with a preset temperature.

[0029] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the method embodiments of the first aspect described above.

[0030] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the method embodiments of the first aspect described above.

[0031] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps in the method embodiments of the first aspect described above.

[0032] In the aforementioned method, apparatus, and computer equipment for determining the cooling capacity of a circuit breaker, by equally spaced division of the arc plasma generated within the arc-extinguishing chamber of the circuit breaker along its axial direction, multiple arc slices are obtained. For each arc slice, based on a target isothermal surface within that arc slice at a preset temperature, the cooling capacity of the corresponding spatial location within the arc-extinguishing chamber of the circuit breaker can be determined. This allows for the determination of the cooling capacity at different spatial locations within the arc-extinguishing chamber of the circuit breaker, achieving a refined description and spatial quantitative assessment of the circuit breaker's cooling capacity. Furthermore, this refined description and spatial quantitative assessment provides direct quantitative evidence for subsequent circuit breaker optimization, improving optimization efficiency and ultimately enhancing the circuit breaker's cooling efficiency. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1Application environment diagrams for the method for determining the cooling capacity of circuit breakers provided in some embodiments of this application;

[0035] Figure 2 A flowchart illustrating a method for determining the cooling capacity of a circuit breaker according to some embodiments of this application;

[0036] Figure 3 A schematic diagram of the process for determining cooling capacity provided in some embodiments of this application;

[0037] Figure 4 A flowchart illustrating the determination of the first energy provided for some embodiments of this application;

[0038] Figure 5 A flowchart illustrating the determination of the first energy provided for other embodiments of this application;

[0039] Figure 6 A flowchart illustrating a method for determining the cooling capacity of a circuit breaker provided in other embodiments of this application;

[0040] Figure 7 A flowchart illustrating a method for determining the cooling capacity of a circuit breaker provided in some embodiments of this application;

[0041] Figure 8 Structural block diagram of a circuit breaker cooling capacity determination device provided in some embodiments of this application;

[0042] Figure 9 An internal structural diagram of a computer device provided for some embodiments of this application;

[0043] Figure 10 This is an internal structural diagram of a computer device provided for other embodiments of this application. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0045] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments or any combination of multiple embodiments.

[0046] Traditional technologies have significant limitations in understanding the cooling capacity of circuit breakers, relying mainly on macroscopic experiments and simplified steady-state models, which make it difficult to accurately describe the cooling capacity of circuit breakers at various spatial locations.

[0047] In view of this, and to solve the above-mentioned technical problems, an exemplary embodiment provides a method for determining the cooling capacity of a circuit breaker. This method can be applied to computer equipment, which can be a server or a terminal. The server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services; the terminal can be, but is not limited to, various personal computers, laptops, smartphones, tablets, etc.

[0048] In an exemplary embodiment, when the circuit breaker is equipped with a control module (such as a smart circuit breaker), the method can also be applied to the circuit breaker and executed by the control module in the circuit breaker.

[0049] In one exemplary embodiment, the method for determining the cooling capacity of a circuit breaker provided in this application can be applied to, for example... Figure 1 In the application environment shown, the intelligent circuit breaker 102 communicates with the server 104 via a network. A data storage system can store the data that the server 104 needs to process. The data storage system can be integrated onto the server 104 or placed in the cloud or on another network server. The intelligent circuit breaker 102 stores information about the arc plasma generated in the arc-extinguishing chamber, such as its structure, temperature, current, and voltage of each isothermal surface, into the data storage system. The server 104 then retrieves this information from the data storage system to execute the circuit breaker cooling capacity determination method provided in this embodiment. Optionally, the intelligent circuit breaker 102 integrates an information acquisition module, a control module, and a transmission module, enabling a closed loop of "autonomous information acquisition-processing-transmission" without relying on external additional equipment.

[0050] In one exemplary embodiment, such as Figure 2 As shown, a method for determining the cooling capacity of a circuit breaker is provided, which can be applied to... Figure 1 Taking server 104 as an example, the explanation may include the following steps:

[0051] S201, in the axial direction of the arc plasma generated in the arc extinguishing chamber of the circuit breaker, the arc plasma is divided into multiple arc slices at equal intervals.

[0052] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. The arc-extinguishing chamber of a circuit breaker refers to the device surrounding the switch contacts that restricts the spatial position of the electric arc and accelerates its extinction. It can also be understood as a small chamber within the circuit breaker that introduces the electric arc and assists in its extinguishing.

[0053] Arc plasma is a high-temperature conductive mixture formed when a gas is ionized under a strong electric field. It includes free electrons, positive ions, neutral particles (atoms / molecules), and excited-state particles, exhibiting characteristics such as high temperature, high conductivity, and dynamic change. When the circuit breaker contacts separate, the gas in the arc-extinguishing chamber generates arc plasma under the strong electric field caused by the contact separation. Subsequently, the arc-extinguishing chamber can be accelerated by injecting insulating gas to disintegrate the ionization state of the arc plasma, restoring it to a gaseous state. This process of arc plasma returning to gas is the cooling process of the arc-extinguishing chamber. The injected insulating gas can be called the cooling gas.

[0054] The arc plasma generated in the arc-extinguishing chamber of a circuit breaker can be considered as a cylindrical high-temperature conductor with irregular boundary features. The geometry of this cylindrical high-temperature conductor dynamically changes under the combined effects of electromagnetic, airflow, and temperature fields. Therefore, for the arc plasma generated in the arc-extinguishing chamber of the circuit breaker at any given time, the arc plasma can be equally divided along its axial direction to obtain multiple continuous arc slices of a certain thickness. In this way, the originally complex and indistinct arc plasma is divided into thin-film units with relatively uniform physical properties, thus achieving a refined description of the arc plasma.

[0055] Optionally, the thickness of the arc slice can be determined according to the geometry of the arc plasma (such as the arc diameter). For example, the thickness of the arc slice can be 1 / 90 to 1 / 100 of the arc diameter of the arc plasma.

[0056] Specifically, dividing the arc plasma generated in the arc-extinguishing chamber of the circuit breaker into equally spaced segments along its axial direction can be understood as using a dividing plane perpendicular to the axial direction of the arc plasma to divide it into equally spaced segments. This is similar to using a dividing plane perpendicular to the axial direction of a cylinder to divide the cylinder into multiple circular pieces of a certain thickness, with each piece having the same thickness.

[0057] By treating the arc plasma as a cylindrical high-temperature conductor with irregular boundary features and segmenting it, we can provide a way to study the interaction between the arc plasma and the injected insulating gas flow during the cooling process of the arc-extinguishing chamber. Furthermore, based on the arc slices, we can quantify the heat exchange efficiency and cooling characteristics of each interface in the axial direction of the arc plasma, identify key regions in the insulating gas flow, and then, by combining multi-physics coupling, determine the differences in cooling effects at different spatial locations within the arc-extinguishing chamber, providing a theoretical basis for optimizing the arc-extinguishing chamber structure.

[0058] S202, for each arc slice, determine the cooling capacity of the corresponding spatial position of the arc slice in the arc extinguishing chamber based on the target isothermal surface in the arc slice with a preset temperature.

[0059] An isothermal surface is a surface formed by connecting points in space that have the same temperature. It can be closed in shape and different isothermal surfaces will not intersect.

[0060] Each arc slice is a thin sheet unit with a certain shape and thickness, occupying a certain space within the arc-extinguishing chamber of the circuit breaker. Therefore, the surfaces formed by connecting points with the same temperature within the space occupied by the arc slice within the arc-extinguishing chamber are called isothermal surfaces within the arc slice. Thus, for each arc slice, a target isothermal surface with a preset temperature can be identified among the isothermal surfaces. Based on this target isothermal surface, the cooling capacity corresponding to the arc slice can be determined, and this cooling capacity can then be used as the cooling capacity of the corresponding spatial location of the arc slice within the arc-extinguishing chamber. Here, the spatial location of the arc slice within the arc-extinguishing chamber refers to the spatial location occupied by the arc slice within the arc-extinguishing chamber. Optionally, for each arc slice, the temperature is highest at its center point, and the temperature decreases with increasing distance from the center point.

[0061] Optionally, after determining the cooling capacity of each spatial location within the arc-extinguishing chamber, the distribution of cooling capacity within the arc-extinguishing chamber can be determined based on the distribution of each spatial location within the arc-extinguishing chamber.

[0062] The aforementioned preset temperature refers to the key temperature used in arc analysis to define the effective operating region of the arc plasma. Typically, at this preset temperature, the gas begins to significantly ionize, forming a plasma state with sufficient conductivity, thus enabling it to effectively carry current. Therefore, for each arc slice, the target isothermal surface at the preset temperature within that arc slice can also be called the characteristic boundary surface, which essentially defines the interface between the arc plasma belonging to that arc slice and the surrounding cold gas. An electric arc is a gas discharge phenomenon, a momentary spark generated when current passes through certain insulating media (such as air).

[0063] Optionally, the preset temperature can be set according to the physical characteristics of gas discharge, and there is no specific limitation. For example, it can be 5000K (Kelvin).

[0064] In the aforementioned method for determining the cooling capacity of a circuit breaker, the arc plasma generated within the arc-extinguishing chamber of the circuit breaker is divided into multiple arc slices at equal intervals along its axial direction. For each arc slice, the cooling capacity of the corresponding spatial location within the arc-extinguishing chamber can be determined based on the target isothermal surface within that arc slice, where the temperature is a preset temperature. This approach allows for the determination of the cooling capacity at different spatial locations within the arc-extinguishing chamber, enabling a refined description and spatial quantitative assessment of the circuit breaker's cooling capacity. Furthermore, this refined description and spatial quantitative assessment provides direct quantitative evidence for subsequent circuit breaker optimization, improving optimization efficiency and ultimately enhancing the circuit breaker's cooling efficiency.

[0065] Based on the above embodiments, in an exemplary embodiment, the determination of cooling capacity in S202 is further refined. Optionally, as... Figure 3 As shown, the following steps may be included:

[0066] S301, based on the target isothermal surface in the arc slice with a preset temperature, determine the first energy carried by the cooling gas corresponding to the arc slice.

[0067] The so-called "first energy" carried by the cooling gas corresponding to the arc slice refers to the energy carried by the cooling gas injected into the arc slice during the cooling process of the arc-extinguishing chamber. Cooling of the arc-extinguishing chamber is achieved through energy exchange between this first energy and the energy carried by the arc slice. Here, the aforementioned first energy is the first energy carried by the cooling gas corresponding to the arc slice per unit time (e.g., 1 second). Optionally, the first energy carried by the cooling gas corresponding to the arc slice is the upper limit of the maximum energy that the cooling gas corresponding to the arc slice can carry.

[0068] Optionally, the gas density, gas flow rate, and gas specific heat capacity at constant pressure of the cooling gas are determined, and based on the above gas density, gas flow rate, and gas specific heat capacity at constant pressure, as well as the target isothermal surface in the arc slice at a preset temperature, the first energy carried by the cooling gas corresponding to the arc slice is determined.

[0069] S302, determine the second energy carried by the arc slice based on the arc voltage and arc current of the arc slice.

[0070] The aforementioned second energy refers to the energy carried by the arc slice per unit time (e.g., 1 second). Through the energy exchange between this second energy and the first energy carried by the cooling gas corresponding to the arc slice, the energy carried by the arc slice is reduced, thereby reducing the temperature of the arc-extinguishing chamber.

[0071] Optionally, the second energy carried by the arc slice can be represented by the electric power of the arc slice per unit time (e.g., 1 second), that is, the product of the arc voltage and arc current of the arc slice can be calculated as the second energy carried by the arc slice.

[0072] S303, based on the ratio of the first energy and the second energy, determine the cooling capacity of the corresponding spatial position of the arc slice in the arc extinguishing chamber.

[0073] After obtaining the first energy and the second energy, a division calculation can be performed on the first energy and the second energy to obtain their ratio. Based on this ratio, the cooling capacity of the corresponding spatial location of the arc slice within the arc-extinguishing chamber can be determined. Optionally, the ratio of the first energy and the second energy can be used as the cooling capacity of the corresponding spatial location of the arc slice within the arc-extinguishing chamber; or, the product of the ratio and a preset coefficient can be used as the cooling capacity of the corresponding spatial location of the arc slice within the arc-extinguishing chamber. The preset coefficient can be determined based on empirical values, experimental values ​​from multiple tests, etc., and is not specifically limited in this regard.

[0074] In this embodiment, by targeting each arc slice with a target isothermal surface at a preset temperature, and the arc voltage and arc current of the arc slice, the cooling capacity of each spatial location in the arc extinguishing chamber of the circuit breaker can be accurately determined, thereby achieving a refined description and spatial quantitative assessment of the cooling capacity of the circuit breaker.

[0075] Based on the above embodiments, in an exemplary embodiment, the determination of the first energy in S301 is further refined. Optionally, as... Figure 4 As shown, the following steps may be included:

[0076] S401, determine the target isothermal surface in the arc slice with the preset temperature.

[0077] Within the arc-slice's arc-extinguishing chamber of the circuit breaker, a surface formed by connecting points of a preset dimension is defined as the target isothermal surface within the arc-slice, where the temperature is the preset temperature.

[0078] S402, determine a first isothermal surface along a first direction and at a first distance from the target isothermal surface, and a second isothermal surface along a second direction and at a second distance from the target isothermal surface.

[0079] The first direction and the second direction are opposite directions, and the first direction or the second direction is the direction from the target isothermal surface to the center of the arc slice.

[0080] S403, determine the first energy carried by the cooling gas corresponding to the arc slice based on the temperature difference between the temperature of the first isothermal surface and the temperature of the second isothermal surface.

[0081] As mentioned earlier, for each arc slice, the temperature is highest at its center, and the temperature decreases with distance from the center. Therefore, after determining the target isothermal surface in the arc slice, for each arc slice, along the direction from the target isothermal surface to the center of the arc slice, isothermal surfaces with temperatures higher than a preset temperature can be identified. Conversely, along the opposite direction, isothermal surfaces with temperatures lower than the preset temperature can be identified. Then, selecting one isothermal surface in each of these two directions results in a temperature difference between them. Based on this temperature difference, the first energy carried by the cooling gas corresponding to the arc slice can be determined.

[0082] Optionally, if the first direction is from the target isothermal surface to the center of the arc slice, the temperature of the first isothermal surface is greater than the preset temperature, and the temperature of the second isothermal surface is less than the preset temperature; or, if the second direction is from the target isothermal surface to the center of the arc slice, the temperature of the second isothermal surface is greater than the preset temperature, and the temperature of the first isothermal surface is less than the preset temperature.

[0083] The first length and the second length can be the same or different, and both the first length and the second length can be set based on empirical values, experimental values ​​from multiple tests, and the physical characteristics of gas discharge, etc., without specific limitations.

[0084] In this embodiment, by determining the first and second isothermal surfaces with a temperature difference based on the target isothermal surface in the arc slice, and determining the first energy carried by the cooling gas corresponding to the arc slice based on the temperature difference, the accuracy of the determined first energy can be further improved, thereby improving the accuracy of the determined cooling capacity of each spatial location in the arc extinguishing chamber of the circuit breaker, so as to achieve a more accurate and refined description and spatial quantitative assessment of the cooling capacity of the circuit breaker.

[0085] Based on the above embodiments, in an exemplary embodiment, the determination of the first energy in S403 is further refined. Optionally, as... Figure 5 As shown, the following steps may be included:

[0086] S501, determine the temperature difference between the temperature of the first isothermal surface and the temperature of the second isothermal surface.

[0087] After determining the first isothermal surface and the second isothermal surface, the temperature of the first isothermal surface and the temperature of the second isothermal surface can be further determined, and the temperature difference between the two temperatures can be determined accordingly.

[0088] S502, determine the gas parameters of the cooling gas corresponding to the arc slice.

[0089] Among them, the gas parameters include gas density, gas specific heat capacity at constant pressure, and gas flow rate.

[0090] As mentioned earlier, the cooling gas corresponding to the arc extinguishing chamber refers to the insulating gas injected into the arc extinguishing chamber during the cooling process. Based on the type of the insulating gas, the gas density, specific heat capacity at constant pressure, and gas flow rate of the insulating gas can be determined as the gas parameters of the cooling gas corresponding to the arc extinguishing chamber.

[0091] The gas flow rate mentioned above refers to the flow rate of the insulating gas per unit time (e.g., 1 second). Furthermore, the type and flow rate of the cooling gas can be set based on experience, the results of multiple tests, and the physical parameters of the circuit breaker, and are not specifically limited in this regard.

[0092] S503 determines the first energy carried by the cooling gas corresponding to the arc slice based on the temperature difference and gas parameters.

[0093] Optionally, the gas density, gas specific heat capacity at constant pressure, gas flow rate, and temperature difference are multiplied, and the resulting product is determined as the first energy carried by the cooling gas corresponding to the arc slice.

[0094] Optionally, the first energy carried by the cooling gas corresponding to the arc slice can be determined using the following formula:

[0095]

[0096] in, The first energy carried by the cooling gas corresponding to the electric arc slice. For gas density, The specific heat capacity of a gas at constant pressure. The gas flow rate is... is a constant representing the area of ​​the boundary element of the arc slice.

[0097] In this embodiment, based on the gas parameters of the cooling gas corresponding to the arc slice and the temperature difference between the temperature of the first isothermal surface and the temperature of the second isothermal surface, the method for determining the first energy carried by the cooling gas corresponding to the arc slice is further refined, thereby improving the accuracy of the determined first energy and thus improving the accuracy of the determined cooling capacity of each spatial location in the arc extinguishing chamber of the circuit breaker.

[0098] Based on the above embodiments, in an exemplary embodiment, such as Figure 6 As shown, the method for determining the cooling capacity of the circuit breaker may include the following steps:

[0099] S601, in the axial direction of the arc plasma generated in the arc extinguishing chamber of the circuit breaker, the arc plasma is divided into multiple arc slices at equal intervals.

[0100] S602, for each arc slice, determine the cooling capacity of the corresponding spatial position of the arc slice in the arc extinguishing chamber based on the target isothermal surface in the arc slice with a preset temperature.

[0101] The specific implementation methods of S601-S602 are the same as those of S201-S202, and will not be repeated here.

[0102] S603, based on the cooling capacity of each spatial location within the arc-extinguishing chamber, determines the weak points within the arc-extinguishing chamber.

[0103] After determining the cooling capacity of the corresponding spatial location of each arc segment within the arc extinguishing chamber, the distribution of cooling capacity in each spatial location within the arc extinguishing chamber can be determined. Specifically, for each spatial location within the arc extinguishing chamber, the lower the cooling capacity of that spatial location, the lower the airflow cooling efficiency of that spatial location. Thus, based on the cooling capacity of each spatial location within the arc extinguishing chamber, the airflow cooling efficiency of each spatial location within the arc extinguishing chamber can be quantified to identify weak locations within the arc extinguishing chamber, where weak locations refer to locations with weak cooling capacity.

[0104] In one optional embodiment, S603 may include determining the spatial locations within the arc-extinguishing chamber where the cooling capacity is less than a preset cooling capacity, in order to obtain the weak locations within the arc-extinguishing chamber; or, when sorting the spatial locations within the arc-extinguishing chamber in ascending order of cooling capacity, determining the spatial locations ranked first by a specified number of positions, in order to obtain the weak locations within the arc-extinguishing chamber.

[0105] Optionally, the spatial location with the minimum cooling capacity within the arc-extinguishing chamber can be determined as the weakest point within the arc-extinguishing chamber; or, if the spatial locations within the arc-extinguishing chamber are sorted in descending order of cooling capacity, the spatial location ranked at the last preset number of positions can be determined to obtain the weakest point within the arc-extinguishing chamber.

[0106] The specified quantity and preset quantity mentioned above can be set based on empirical values, experimental values ​​from multiple trials, and application requirements in actual applications, and there are no specific limitations on them. Furthermore, both the specified quantity and the preset quantity can be integers not less than 1.

[0107] S604. Based on the distribution of weak points, determine the optimization scheme for the circuit breaker.

[0108] Once the aforementioned weak points are identified, their distribution within the arc-extinguishing chamber allows for the determination of an optimized circuit breaker design. These weak points provide a quantitative basis for the design of the arc-extinguishing chamber structure, airflow channel arrangement, and insulation material selection, enabling precise optimization of the circuit breaker's breaking performance. For example, the curvature of the airflow channels, the density of the grid arrangement, and the contact geometry can be adjusted to achieve precise circuit breaker design.

[0109] In this embodiment, a complete technical path was established, from quantitative evaluation of the cooling capacity of each spatial location in the arc extinguishing chamber to circuit breaker structure optimization. Based on achieving precise optimization of the circuit breaker, the optimization cycle of the circuit breaker was shortened, and the optimization efficiency and effect of the circuit breaker were improved.

[0110] Based on the above embodiments, in an exemplary embodiment, such as Figure 7 As shown, the method for determining the cooling capacity of the circuit breaker may include the following steps:

[0111] S701, in the axial direction of the arc plasma generated in the arc extinguishing chamber of the circuit breaker, the arc plasma is divided into multiple arc slices at equal intervals.

[0112] S702, for each arc slice, determine a target isothermal surface in the arc slice with a preset temperature, and determine a first isothermal surface along a first direction and at a first distance from the target isothermal surface, and a second isothermal surface along a second direction and at a second distance from the target isothermal surface.

[0113] S703, for each arc slice, determine the temperature difference between the temperature of the first isothermal surface and the temperature of the second isothermal surface; and determine the gas parameters of the cooling gas corresponding to the arc slice.

[0114] S704, for each arc slice, determine the first energy carried by the cooling gas corresponding to the arc slice based on the temperature difference and gas parameters, and determine the second energy carried by the arc slice based on the arc voltage and arc current of the arc slice.

[0115] S705, for each arc slice, determines the cooling capacity of the corresponding spatial position of the arc slice in the arc extinguishing chamber based on the ratio of the first energy and the second energy.

[0116] S706, determine the spatial locations within the arc-extinguishing chamber where the cooling capacity is less than the preset cooling capacity, so as to obtain the weak points within the arc-extinguishing chamber; or, if the spatial locations within the arc-extinguishing chamber are sorted in order of increasing cooling capacity, determine the spatial locations that are ranked first by a specified number of positions, so as to obtain the weak points within the arc-extinguishing chamber.

[0117] S707, determine the optimization scheme of the circuit breaker based on the distribution of weak points.

[0118] The specific implementation methods of S701-S707 are the same as those in the above method embodiments, and will not be repeated here.

[0119] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0120] Based on the same inventive concept, this application also provides a circuit breaker cooling capacity determination device for implementing the circuit breaker cooling capacity determination method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more circuit breaker cooling capacity determination device embodiments provided below can be found in the limitations of the circuit breaker cooling capacity determination method described above, and will not be repeated here.

[0121] In one exemplary embodiment, such as Figure 8 As shown, a device for determining the cooling capacity of a circuit breaker is provided, comprising: an arc-breaking module 810 and a capacity determination module 820, wherein:

[0122] The arc cutting module 810 is used to cut the arc plasma generated in the arc extinguishing chamber of the circuit breaker into multiple arc slices by equal spacing in the axial direction of the arc plasma.

[0123] The capability determination module 820 is used to determine the cooling capacity of the corresponding spatial location of the arc slice in the arc extinguishing chamber for each arc slice, based on the target isothermal surface in the arc slice with a preset temperature.

[0124] In one exemplary embodiment, the capability determination module 820 includes:

[0125] The first determining unit is used to determine the first energy carried by the cooling gas corresponding to the arc slice based on the target isothermal surface in the arc slice with a preset temperature.

[0126] The second determining unit is used to determine the second energy carried by the arc slice based on the arc voltage and arc current of the arc slice.

[0127] The capacity determination unit is used to determine the cooling capacity of the corresponding spatial position of the arc slice in the arc extinguishing chamber based on the ratio of the first energy and the second energy.

[0128] In one exemplary embodiment, the first determining unit includes:

[0129] The first determining subunit is used to determine the target isothermal surface in the arc slice with a preset temperature;

[0130] The second determining subunit is used to determine a first isothermal surface along a first direction and at a first distance from the target isothermal surface, and a second isothermal surface along a second direction and at a second distance from the target isothermal surface; wherein the first direction and the second direction are opposite directions, and the first direction or the second direction is the direction from the target isothermal surface to the center of the arc slice;

[0131] The third determining subunit is used to determine the first energy carried by the cooling gas corresponding to the arc slice based on the temperature difference between the temperature of the first isothermal surface and the temperature of the second isothermal surface.

[0132] In one exemplary embodiment, the third determining subunit is specifically used for:

[0133] Determine the temperature difference between the temperatures of the first isotherm and the second isotherm; and,

[0134] Determine the gas parameters of the cooling gas corresponding to the electric arc slice; the gas parameters include gas density, gas specific heat capacity at constant pressure, and gas flow rate.

[0135] Based on the temperature difference and gas parameters, the first energy carried by the cooling gas corresponding to the arc slice is determined.

[0136] In one exemplary embodiment, the circuit breaker cooling capacity determination device further includes:

[0137] The location determination module is used to determine the weak points in the arc-extinguishing chamber based on the cooling capacity of each spatial location within the arc-extinguishing chamber.

[0138] The scheme determination module is used to determine the optimal scheme for circuit breakers based on the distribution of weak points.

[0139] In one exemplary embodiment, the location determination module is specifically used for:

[0140] Identify the spatial locations within the arc-extinguishing chamber where the cooling capacity is less than the preset cooling capacity, in order to determine the weak points within the arc-extinguishing chamber; or,

[0141] By sorting the spatial locations within the arc-extinguishing chamber according to their cooling capacity from smallest to largest, the spatial locations ranked first by a specified number of positions are determined to identify the weak points within the arc-extinguishing chamber.

[0142] The modules in the aforementioned circuit breaker cooling capacity determination device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the operations corresponding to each module.

[0143] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 9 As shown, the computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores information about the electric arc plasma. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network connection. When executed by the processor, the computer program implements a method for determining the cooling capacity of a circuit breaker.

[0144] In one exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 10As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When executed by the processor, the computer program implements a method for determining the cooling capacity of a circuit breaker. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0145] Those skilled in the art will understand that Figures 9-10 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0146] In one exemplary embodiment, a computer device is provided, including a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the steps of the various method embodiments of the circuit breaker cooling capacity determination method described above.

[0147] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the method embodiments of the method for determining the cooling capacity of the circuit breaker described above.

[0148] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the method embodiments of the method for determining the cooling capacity of a circuit breaker described above.

[0149] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0150] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0151] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for determining the cooling capacity of a circuit breaker, characterized in that, The method includes: In the axial direction of the arc plasma generated in the arc extinguishing chamber of the circuit breaker, the arc plasma is divided into multiple arc slices at equal intervals. For each arc slice, the cooling capacity of the corresponding spatial position of the arc slice in the arc extinguishing chamber is determined based on the target isothermal surface in the arc slice where the temperature is a preset temperature.

2. The method according to claim 1, characterized in that, The step of determining the cooling capacity of the corresponding spatial position of the arc slice in the arc extinguishing chamber based on the target isothermal surface in the arc slice with a preset temperature includes: Based on the target isothermal surface in the arc slice where the temperature is a preset temperature, determine the first energy carried by the cooling gas corresponding to the arc slice; and... The second energy carried by the arc slice is determined based on the arc voltage and arc current of the arc slice; The cooling capacity of the arc slice corresponding to the spatial position in the arc extinguishing chamber is determined based on the ratio of the first energy to the second energy.

3. The method according to claim 2, characterized in that, The step of determining the first energy carried by the cooling gas corresponding to the arc slice based on the target isothermal surface with a preset temperature in the arc slice includes: Determine the target isothermal surface in the arc slice where the temperature is a preset temperature; A first isothermal surface is determined along a first direction and at a first distance from the target isothermal surface, and a second isothermal surface is determined along a second direction and at a second distance from the target isothermal surface; wherein the first direction and the second direction are opposite directions, and the first direction or the second direction is a direction pointing from the target isothermal surface to the center of the arc slice; The first energy carried by the cooling gas corresponding to the arc slice is determined based on the temperature difference between the temperature of the first isothermal surface and the temperature of the second isothermal surface.

4. The method according to claim 3, characterized in that, The step of determining the first energy carried by the cooling gas corresponding to the arc slice based on the temperature difference between the temperatures of the first isothermal surface and the second isothermal surface includes: Determine the temperature difference between the temperatures of the first isothermal surface and the second isothermal surface; and, Determine the gas parameters of the cooling gas corresponding to the arc slice; wherein, the gas parameters include gas density, gas specific heat capacity at constant pressure, and gas flow rate; Based on the temperature difference and the gas parameters, the first energy carried by the cooling gas corresponding to the arc slice is determined.

5. The method according to any one of claims 1-4, characterized in that, The method further includes: Based on the cooling capacity of each spatial location within the arc-extinguishing chamber, the weak points within the arc-extinguishing chamber are determined. Based on the distribution of the weak points, an optimization scheme for the circuit breaker is determined.

6. The method according to claim 5, characterized in that, The step of determining the weak points within the arc-extinguishing chamber based on the cooling capacity of each spatial location within the chamber includes: Determine the spatial locations within the arc-extinguishing chamber where the cooling capacity is less than a preset cooling capacity, in order to identify the weak points within the arc-extinguishing chamber; or, By sorting the spatial positions within the arc-extinguishing chamber in ascending order of cooling capacity, the spatial positions ranked first by a specified number of positions are determined to identify the weak points within the arc-extinguishing chamber.

7. A device for determining the cooling capacity of a circuit breaker, characterized in that, The device includes: An arc-splitting module is used to divide the arc plasma generated in the arc-extinguishing chamber of a circuit breaker into multiple arc slices at equal intervals along the axial direction. The capability determination module is used to determine the cooling capacity of the corresponding spatial position of the arc slice in the arc extinguishing chamber for each arc slice, based on the target isothermal surface in the arc slice where the temperature is a preset temperature.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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