CN112115624A - Analysis method, lightning arrester, analysis device, and computer-readable storage medium - Google Patents
Analysis method, lightning arrester, analysis device, and computer-readable storage medium Download PDFInfo
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Abstract
The invention provides an analysis method, a lightning arrester, an analysis device and a computer readable storage medium. The analysis method of the present invention comprises: establishing a geometric model based on the structure of the lightning arrester; inputting environmental and electrical parameters for internal components of the arrester into the geometric model according to the environmental and electrical parameters; inputting boundary conditions of a heat transfer process for the lightning arrester into the geometric model; carrying out self-adaptive mesh generation on each generation unit in the geometric model to obtain a generation result; and carrying out simulation analysis on the geometric model based on the subdivision result and the boundary condition so as to obtain a temperature distribution diagram of the lightning arrester. The technical scheme of the invention can be used for carrying out accurate and efficient thermal stability analysis on the lightning arrester.
Description
Technical Field
The invention relates to the technical field of simulation calculation, in particular to an analysis method, a lightning arrester, an analysis device and a computer-readable storage medium.
Background
At present, most of lightning arresters commonly used in an electric power system are metal oxide lightning arresters. The lightning arrester is in a high-resistance state when a system normally operates, the leakage current is extremely low, and the temperature of the equipment is not high. When high overvoltage exists in the system, the lightning arrester releases a large amount of energy, the discharge current can reach the ten-kilo-ampere level, and the temperature of equipment rises rapidly. In addition, the lightning arrester valve plate is easy to damp and age under the condition of long-term operation or poor sealing of the equipment body, so that the overall performance of the lightning arrester valve plate is reduced. The performance reduction of the valve plate of the lightning arrester can cause that the current actually flowing through the lightning arrester body exceeds the nominal discharge current when the fault current is discharged, so that the temperature of equipment is rapidly increased, and thermal breakdown is caused. Therefore, it is necessary to establish an effective thermal stability analysis mechanism and analysis method for the lightning arrester.
Whether the thermal stability of the arrester meets the requirements or not is judged by the method, namely the heat generated when the arrester runs is estimated, and the capability of the arrester body for dissipating the heat to the surrounding environment is compared in the modes of heat conduction, convection and the like. The heat generated by the lightning arrester during operation is generally considered to be generated by active power and can be estimated by voltage and resistive current components across the lightning arrester. The heat dissipation performance of the lightning arrester is related to the initial temperature and the ambient temperature, so the main method for evaluating the thermal stability is to calculate the heat dissipation performance of the lightning arrester.
The technical scheme that the thermal stability of the lightning arrester can be accurately and effectively analyzed is lacked in the prior art.
Disclosure of Invention
The present invention is directed to solving at least one of the above problems. To this end, the invention provides an analysis method, a lightning arrester, an analysis device and a computer-readable storage medium. According to the technical scheme, the thermal stability of the lightning arrester can be accurately and effectively analyzed, so that experimental research and improvement on the thermal stability of the lightning arrester under different working conditions can be conveniently carried out.
To achieve the first object of the present invention, the present embodiment provides an analysis method, including: establishing a geometric model based on the structure of the lightning arrester; inputting environmental and electrical parameters for internal elements of the arrester into the geometric model; inputting boundary conditions of a heat transfer process for the lightning arrester into the geometric model according to the environmental parameter and the electrical parameter; carrying out self-adaptive mesh generation on each generation unit in the geometric model to obtain a generation result; and carrying out simulation analysis on the geometric model based on the subdivision result and the boundary condition so as to obtain a temperature distribution diagram of the lightning arrester.
The purpose of this embodiment is in order to obtain the temperature characteristic when the arrester applies operating voltage to through emulation software to the inside heat distribution condition of arrester and heat dispersion simulate, provide the basis for optimizing the heat dissipation design of arrester. Particularly, this embodiment can obtain the inside temperature distribution condition of arrester when arrester compression test, and the thermal stability to the arrester under normal operating condition assesses, makes it reach the operating mode of bleeder current to optimize the factor of safety that improves the arrester, improve and promote the heat dispersion of arrester, improve research and development efficiency. To sum up, through this embodiment, can optimize the simulation to the heat dispersion of arrester at the design stage, through modes such as changing the arrester structure, improve and promote the heat dispersion of arrester.
In addition, the technical solution provided by the above embodiment of the present invention may further have the following additional technical features:
in the above technical solution, the building of the geometric model based on the structure of the lightning arrester specifically includes: respectively establishing the physical structure of each component in the lightning arrester; performing geometric relationship adjustment on the physical structure so as to make the structural space of the arrester continuous and make the physical quantity of the arrester continuous at an interface; obtaining a geometric structure in the arrester to provide a geometric entity for the setting of the boundary conditions and the implementation of the simulation analysis.
In any of the above technical solutions, the physical structure includes at least one of the following or a combination thereof: the device comprises an insulation structure, a positive electrode, a negative electrode, a resistance disc, a spring mechanism, a gasket, an insulation rod, a terminal flange, a discharge area and a gas area; the geometric relationship adjustment comprises at least one of the following or a combination thereof: chamfer setting, combination setting, array setting, coincidence setting and coaxial setting.
In any one of the above technical solutions, the respectively establishing the physical structures of the components in the arrester specifically includes: defining the length of an electrode, the radius of the electrode, the inner diameter of a discharge space, the outer diameter of the discharge space, the inner diameter of a negative electrode, the outer diameter of the negative electrode and the position of the electrode in the discharge space of the lightning arrester; respectively establishing the physical structures through the geometric sequences of the lightning arresters; the physical structure is established based on a cylindrical coordinate system, the height axial direction of the cylindrical coordinate system is the axial direction of the electrode of the lightning arrester, and the radial direction of the cylindrical coordinate system is the radial direction of the electrode of the lightning arrester.
In any of the above technical solutions, the performing adaptive mesh generation on each generation unit in the geometric model specifically includes: each part in the lightning arrester is subjected to subdivision treatment according to subdivision units; the method comprises the following steps of carrying out subdivision processing on a subdivision target area in the lightning arrester according to a first subdivision unit, carrying out subdivision processing on an external insulation area in the lightning arrester according to a second subdivision unit, wherein the unit size of the first subdivision unit is smaller than that of the second subdivision unit, and the subdivision target area comprises at least one of the following parts or the combination thereof: resistor area, spacer area, insulator spindle area, gas area.
In any one of the above technical solutions, the subdividing each component in the arrester according to a subdividing unit specifically includes: establishing a characteristic relation for solving the interaction force between the unknown quantity and the node according to a multi-physical-field coupling mode of strong coupling and weak coupling; the characteristic relations of all the subdivision units are gathered according to a solving mode of breaking whole into zero in a finite element method and integrating the zero into the whole so as to introduce boundary conditions and form an algebraic equation set with node variables as unknown quantities; and solving the algebraic equation system to obtain variables to be solved at the nodes with limited number.
In any of the above technical solutions, the performing simulation analysis based on the geometric model specifically includes: the simulation analysis was performed based on the following transient heat transfer control differential equation:
wherein d iszFor subdivision units along the Z-axis direction in a cylindrical coordinate system established based on the electrode direction of the lightning arrester, rho is the material density of components in the lightning arrester, CpThe method comprises the steps of obtaining the heat capacity of a material of a component in the lightning arrester, obtaining T as the temperature of the component in the lightning arrester, obtaining T as time, obtaining T as a temperature gradient, obtaining u as a velocity vector, obtaining q as a heat conduction rate, and obtaining k as a material heat conduction coefficient of the component in the lightning arrester. Q is heat of heat source, QtedTo increase the heat of the heat source. q. q.s0Is the convective heat flux.
To achieve the second object of the present invention, the present embodiment provides a lightning arrester, which is suitable for thermal stability analysis by using the analysis method according to any one of the embodiments of the present invention.
The arrester of the embodiment of the present invention performs thermal stability analysis by using the analysis method according to any embodiment of the present invention, so that the arrester has all the beneficial effects of the analysis method according to any embodiment of the present invention, and details are not repeated herein.
To achieve the third object of the present invention, the present embodiment provides an analysis apparatus, including: a memory storing a computer program; a processor executing the computer program; wherein the processor, when executing the computer program, performs the steps of the analysis method according to any of the embodiments of the present invention.
The analysis apparatus of this embodiment performs thermal stability analysis by using the analysis method according to any embodiment of the present invention, so that the analysis apparatus has all the advantages of the analysis method according to any embodiment of the present invention, and further description thereof is omitted here.
To achieve the fourth object of the present invention, the present embodiment provides a computer-readable storage medium, characterized by comprising: the computer readable storage medium stores a computer program which, when executed, implements the steps of the analysis method according to any one of the embodiments of the present invention.
The computer-readable storage medium of this embodiment performs thermal stability analysis by using the analysis method according to any embodiment of the present invention, so that the computer-readable storage medium has all the advantages of the analysis method according to any embodiment of the present invention, and details thereof are not repeated herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention will be described in further detail with reference to the drawings and specific embodiments for facilitating understanding and practicing of the invention by those of ordinary skill in the art, but it should be understood that the scope of the invention is not limited by the specific embodiments.
Fig. 1 is a schematic model view of a lightning arrester according to the present invention;
FIG. 2 is a flow chart of the steps of the analysis method of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Example 1
The present embodiment provides an analysis method for performing thermal stability analysis on the lightning arrester 100 shown in fig. 1, the analysis method including:
s102, establishing a geometric model based on the structure of the lightning arrester;
s104, inputting environmental parameters and electrical parameters aiming at internal elements of the lightning arrester into the geometric model;
s106, inputting boundary conditions aiming at the heat transfer process of the lightning arrester into the geometric model according to the environmental parameters and the electrical parameters;
s108, performing self-adaptive mesh generation on each generation unit in the geometric model to obtain a generation result;
and S110, carrying out simulation analysis on the geometric model based on the subdivision result and the boundary condition so as to obtain a temperature distribution diagram of the lightning arrester.
In this embodiment, the geometric modeling of the arrester structure is performed using finite element simulation software. The boundary conditions include solid and fluid heat transfer boundary conditions of the arrester. In the self-adaptive mesh generation step, a generation mechanism can be optimized according to the actual heat distribution condition so as to improve the operation efficiency. The purpose of the simulation analysis is to generate a temperature profile from which the thermal stability of the internal components of the arrester can be determined.
In the step of inputting the boundary conditions of the heat transfer process aiming at the lightning arrester into the geometric model, the specific heat capacity of each element in the lightning arrester can be approximately considered as a constant, the natural heat dissipation process is mainly based on heat conduction and convection, and the heat radiation is negligible.
The temperature distribution graph is used for graphically displaying a simulation calculation result, the temperature distribution graph is verified through an actual test, and the model can be used for calculating heat generation, heat dissipation performance and the like of the lightning arrester under other working conditions. The initial temperature, the ambient temperature and the electric field condition of the geometric model established by the embodiment are changed, the temperature distribution condition of the lightning arrester under other working conditions can be obtained, and the heat dissipation performance of the lightning arrester is optimized by changing the internal structure.
The purpose of this embodiment is in order to obtain the temperature characteristic when the arrester applies operating voltage to through emulation software to the inside heat distribution condition of arrester and heat dispersion simulate, provide the basis for optimizing the heat dissipation design of arrester. Particularly, this embodiment can obtain the inside temperature distribution condition of arrester when arrester compression test, and the thermal stability to the arrester under normal operating condition assesses, makes it reach the operating mode of bleeder current to optimize the factor of safety that improves the arrester, improve and promote the heat dispersion of arrester, improve research and development efficiency. To sum up, through this embodiment, can optimize the simulation to the heat dispersion of arrester at the design stage, through modes such as changing the arrester structure, improve and promote the heat dispersion of arrester.
Example 2
The present embodiment provides an analysis method, and in addition to the features of the above embodiments, the present embodiment further includes the following technical features.
The structure based on the arrester is established a geometric model, and the structure based on the arrester specifically comprises:
s202, respectively establishing physical structures of all components in the lightning arrester;
s204, adjusting the geometrical relationship of the physical structure to ensure that the structural space of the arrester is continuous and the physical quantity of the arrester is continuous at an interface;
s206, acquiring a geometric structure in the lightning arrester to provide a geometric entity for setting the boundary condition and implementing the simulation analysis.
The purpose of this embodiment is to obtain accurate geometric entity to the arrester for subsequent simulation analysis provides the basis.
Example 3
The present embodiment provides an analysis method, and in addition to the features of the above embodiments, the present embodiment further includes the following technical features.
The physical structure comprises at least one of the following or a combination thereof: the device comprises an insulation structure, a positive electrode, a negative electrode, a resistance disc, a spring mechanism, a gasket, an insulation rod, a terminal flange, a discharge area and a gas area; the geometric relationship adjustment comprises at least one of the following or a combination thereof: chamfer setting, combination setting, array setting, coincidence setting and coaxial setting.
In other words, said building a geometric model based on the structure of the arrester means: and respectively establishing physical structures of an arrester insulating structure, a positive electrode, a negative electrode, a resistance card, a spring mechanism, a gasket, an insulating rod, a terminal flange, a discharge area and a gas area. The physical structure space is continuous and the physical quantity is continuous at the interface by operations of chamfering, merging, array, superposition, coaxiality and the like. Therefore, the embodiment can generate relatively independent body, surface and line structures, and provide geometric entities for the solution domain setting and boundary condition setting operations of the subsequent simulation process.
Example 4
The present embodiment provides an analysis method, and in addition to the features of the above embodiments, the present embodiment further includes the following technical features.
The establishing of the physical structures of the components in the lightning arrester respectively specifically includes:
s304, defining the length of an electrode, the radius of the electrode, the inner diameter of a discharge space, the outer diameter of the discharge space, the inner diameter of a negative electrode, the outer diameter of the negative electrode and the position of the electrode in the discharge space of the lightning arrester;
s306, respectively establishing the physical structures through the geometric sequences of the lightning arresters.
The physical structure is established based on a cylindrical coordinate system, the height axial direction of the cylindrical coordinate system is the axial direction of the electrode of the lightning arrester, and the radial direction of the cylindrical coordinate system is the radial direction of the electrode of the lightning arrester.
Specifically, in the present embodiment, it is preferable to define the electrode length L, the electrode radius R, the discharge space inner diameter Ri, the discharge space outer diameter Ro, the negative electrode inner diameter Rin, the negative electrode outer diameter Ron, and the position of the electrode in the discharge space. Furthermore, physical structures such as ceramic insulation structures, positive electrodes, negative electrodes and discharge areas are respectively established through the geometric sequence of the actual lightning arrester body. Namely: and taking the z-axis direction of the cylindrical coordinate system as the axial direction of the electrode, taking the r-axis direction as the radial direction of the electrode, and establishing all geometric entities, thereby ensuring that the physical quantity and the grid division are continuous at the boundary.
Example 5
The present embodiment provides an analysis method, and in addition to the features of the above embodiments, the present embodiment further includes the following technical features.
The self-adaptive mesh generation is performed on each generation unit in the geometric model, and the method specifically comprises the following steps: and subdividing each component in the lightning arrester according to a subdividing unit. The method comprises the following steps of carrying out subdivision processing on a subdivision target area in the lightning arrester according to a first subdivision unit, carrying out subdivision processing on an external insulation area in the lightning arrester according to a second subdivision unit, wherein the unit size of the first subdivision unit is smaller than that of the second subdivision unit, and the subdivision target area comprises at least one of the following parts or the combination thereof: resistor area, spacer area, insulator spindle area, gas area.
In this embodiment, the subdivision target area is the internal structure or area most concerned with: resistance card, gasket, insulator spindle, gas domain area. In the embodiment, the structure or the area is divided into more fine units, and the minimum unit size is 16 mm. While the area of the outer insulating structure can be provided with large cell particles with a maximum cell size of 500 mm.
Example 6
The present embodiment provides an analysis method, and in addition to the features of the above embodiments, the present embodiment further includes the following technical features.
The subdivision processing of each component in the lightning arrester according to subdivision units specifically comprises:
s402, establishing a characteristic relation between the unknown quantity and the node interaction force according to a multi-physical-field coupling mode of strong coupling and weak coupling;
s404, collecting the characteristic relations of all the subdivision units according to a solving mode of breaking up whole into zero in a finite element method and collecting zero as whole so as to introduce boundary conditions and form an algebraic equation system with node variables as unknowns;
s406, solving the algebraic equation system to obtain variables to be solved at the nodes with limited number.
The boundary conditions of the present embodiment include: deformation coordination conditions, continuous conditions or variation principles and energy principles. The node variables of this embodiment include: temperature, potential, concentration, heat transfer coefficient.
Example 7
The present embodiment provides an analysis method, and in addition to the features of the above embodiments, the present embodiment further includes the following technical features.
The simulation analysis based on the geometric model specifically includes:
the simulation analysis was performed based on the following transient heat transfer control differential equation:
wherein d iszFor subdivision units along the Z-axis direction in a cylindrical coordinate system established based on the electrode direction of the lightning arrester, rho is the material density of components in the lightning arrester, CpThe method comprises the steps of obtaining the heat capacity of a material of a component in the lightning arrester, obtaining T as the temperature of the component in the lightning arrester, obtaining T as time, obtaining T as a temperature gradient, obtaining u as a velocity vector, obtaining q as a heat conduction rate, and obtaining k as a material heat conduction coefficient of the component in the lightning arrester. Q is heat of heat source, QtedTo increase the heat of the heat source. q. q.s0Is the convective heat flux.
Example 8
This embodiment provides a lightning arrester characterized by being suitable for thermal stability analysis using the analysis method according to any one of the embodiments of the present invention.
Example 9
The present embodiment provides an analysis apparatus, including: a memory storing a computer program; a processor executing the computer program; wherein the processor, when executing the computer program, performs the steps of the analysis method according to any of the embodiments of the present invention.
Example 10
The present embodiments provide a computer-readable storage medium, comprising: the computer readable storage medium stores a computer program which, when executed, implements the steps of the analysis method according to any one of the embodiments of the present invention.
Example 11
The present embodiment provides an analysis method, and in addition to the features of the above embodiments, the present embodiment further includes the following technical features.
As shown in fig. 2, the analysis method of the present embodiment includes:
s502, establishing a geometric model of the lightning arrester;
s504, setting boundary conditions of solid heat transfer and fluid heat transfer of the lightning arrester;
s506, self-adaptive mesh generation is carried out;
s508, discretization processing of a three-dimensional solution domain;
s510, defining a physical quantity change function;
s512, establishing a unit equation;
s514, unit integration loading excitation;
s516, introducing boundary conditions to solve physical quantities of each node;
and S518, acquiring the temperature field distribution of the lightning arrester.
The temperature characteristic of the arrester when applying the operating voltage can be obtained, and the heat distribution condition and the heat dispersion performance inside the arrester are simulated through simulation software, so that a basis is provided for optimizing the heat dissipation design of the arrester.
In the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "connected" and "fixed" are to be construed broadly, e.g., "connected" may be a fixed connection, a removable connection, or an integral connection. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the indicated devices or units must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. An analysis method, characterized in that the analysis method comprises:
establishing a geometric model based on the structure of the lightning arrester;
inputting environmental and electrical parameters for internal elements of the arrester into the geometric model;
inputting boundary conditions of a heat transfer process for the lightning arrester into the geometric model according to the environmental parameter and the electrical parameter;
carrying out self-adaptive mesh generation on each generation unit in the geometric model to obtain a generation result;
and carrying out simulation analysis on the geometric model based on the subdivision result and the boundary condition so as to obtain a temperature distribution diagram of the lightning arrester.
2. The analysis method according to claim 1, characterized in that said building of a geometric model based on the structure of the arrester comprises in particular:
respectively establishing the physical structure of each component in the lightning arrester;
performing geometric relationship adjustment on the physical structure so as to make the structural space of the arrester continuous and make the physical quantity of the arrester continuous at an interface;
obtaining a geometric structure in the arrester to provide a geometric entity for the setting of the boundary conditions and the implementation of the simulation analysis.
3. The analytical method of claim 2,
the physical structure comprises at least one of the following or a combination thereof: the device comprises an insulation structure, a positive electrode, a negative electrode, a resistance disc, a spring mechanism, a gasket, an insulation rod, a terminal flange, a discharge area and a gas area;
the geometric relationship adjustment comprises at least one of the following or a combination thereof: chamfer setting, combination setting, array setting, coincidence setting and coaxial setting.
4. The analysis method according to claim 2, wherein the establishing of the physical structure of each component in the arrester comprises:
defining the length of an electrode, the radius of the electrode, the inner diameter of a discharge space, the outer diameter of the discharge space, the inner diameter of a negative electrode, the outer diameter of the negative electrode and the position of the electrode in the discharge space of the lightning arrester;
respectively establishing the physical structures through the geometric sequences of the lightning arresters;
the physical structure is established based on a cylindrical coordinate system, the height axial direction of the cylindrical coordinate system is the axial direction of the electrode of the lightning arrester, and the radial direction of the cylindrical coordinate system is the radial direction of the electrode of the lightning arrester.
5. The analysis method according to claim 1, wherein the performing adaptive mesh generation on each generation unit in the geometric model specifically includes:
each part in the lightning arrester is subjected to subdivision treatment according to subdivision units;
the method comprises the following steps of carrying out subdivision processing on a subdivision target area in the lightning arrester according to a first subdivision unit, carrying out subdivision processing on an external insulation area in the lightning arrester according to a second subdivision unit, wherein the unit size of the first subdivision unit is smaller than that of the second subdivision unit, and the subdivision target area comprises at least one of the following parts or the combination thereof: resistor area, spacer area, insulator spindle area, gas area.
6. The analysis method according to claim 5, wherein the subdividing of each component in the lightning arrester according to a subdividing unit comprises:
establishing a characteristic relation for solving the interaction force between the unknown quantity and the node according to a multi-physical-field coupling mode of strong coupling and weak coupling;
the characteristic relations of all the subdivision units are gathered according to a solving mode of breaking whole into zero in a finite element method and integrating the zero into the whole so as to introduce boundary conditions and form an algebraic equation set with node variables as unknown quantities;
and solving the algebraic equation system to obtain variables to be solved at the nodes with limited number.
7. The analysis method according to any one of claims 1 to 6, wherein the performing simulation analysis based on the geometric model specifically comprises:
the simulation analysis was performed based on the following transient heat transfer control differential equation:
wherein d iszFor subdivision units along the Z-axis direction in a cylindrical coordinate system established based on the electrode direction of the lightning arrester, rho is the material density of components in the lightning arrester, CpIs the heat capacity of the material of the component in the arrester, T is the temperature of the component in the arrester, T is time, [ T ] is the temperature gradient, u is the velocity vector, Q is the heat conduction rate, k is the material heat conductivity coefficient of the component in the arrester, Q is the heat source heat, QtedTo increase heat source heat, q0Is the convective heat flux.
8. An arrester, characterized in that it is adapted to be subjected to thermal stability analysis using the analysis method as claimed in any one of claims 1 to 7.
9. An analysis apparatus, comprising:
a memory storing a computer program;
a processor executing the computer program;
wherein the processor, when executing the computer program, implements the steps of the analysis method according to any one of claims 1 to 7.
10. A computer-readable storage medium, comprising:
the computer-readable storage medium stores a computer program which, when executed, implements the steps of the analysis method of any one of claims 1 to 7.
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