CN113408091B - Dry-type casing parameter design platform and design method based on finite element method - Google Patents

Dry-type casing parameter design platform and design method based on finite element method Download PDF

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CN113408091B
CN113408091B CN202110605035.8A CN202110605035A CN113408091B CN 113408091 B CN113408091 B CN 113408091B CN 202110605035 A CN202110605035 A CN 202110605035A CN 113408091 B CN113408091 B CN 113408091B
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type sleeve
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electric field
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CN113408091A (en
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聂宇
兰贞波
宋友
邓建钢
王卓
徐卓林
柯磊
聂德鑫
周倩雯
徐玉
石悠旖
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Wuhan NARI Ltd
State Grid Electric Power Research Institute
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State Grid Electric Power Research Institute
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    • G06FELECTRIC DIGITAL DATA PROCESSING
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    • G06F30/20Design optimisation, verification or simulation
    • G06F30/23Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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Abstract

The invention discloses a dry-type sleeve parameter design method based on a finite element method, which comprises the steps of firstly inputting required dry-type sleeve capacitor core structure parameters including a sleeve form and a calculation method, zero-last-two-layer polar plate length and radius and total number of polar plate layers, obtaining detailed capacitor core structure parameters through calculation, then calculating related electrical parameters by using the finite element method, displaying a processed result diagram, comprehensively considering the electrical performance of a sleeve capacitor core, further optimizing the dry-type sleeve capacitor core structure parameters, effectively improving the dry-type sleeve capacitor core structure parameter design efficiency and having wide practicability.

Description

Dry-type casing parameter design platform and design method based on finite element method
Technical Field
The invention relates to the technical field of dry-type sleeve parameter design, in particular to a dry-type sleeve parameter design platform and a dry-type sleeve parameter design method based on a finite element method.
Background
When the voltage level of the dry-type sleeve is higher, a capacitor core needs to be designed, and the capacitor core is formed by wrapping a capacitor screen and insulating layers at intervals to form a multilayer cylindrical capacitor. The reasonable design of the structural parameters of the capacitor core can enable the radial field intensity E of the capacitor core to be higher rAnd axial field strength ElThe distribution is uniform, thereby improving the insulating strength of the sleeve. The structural size parameters can be obtained by a core design method, corresponding electrical parameters are obtained by an analytical method, and the electrical parameters solved by the analytical method are not accurate enough and have certain deviation.
Disclosure of Invention
The invention aims to provide a dry-type casing parameter design platform and a dry-type casing parameter design method based on a finite element method.
In order to achieve the purpose, the invention designs a dry-type casing parameter design platform based on a finite element method, which is characterized in that: the device comprises a dry-type sleeve parameter setting module, a finite element calculation module and a dry-type sleeve capacitor core parameter judgment module;
the dry-type sleeve structure parameter setting module is used for determining the type of a dry-type sleeve, the design method of a dry-type sleeve core, the lengths and the radiuses of a dry-type sleeve core zero-layer polar plate and an end-layer polar plate and the total number of dry-type sleeve core polar plates according to the actual application occasion of the dry-type sleeve, and calculating the dry-type sleeve structure parameters by using the selected dry-type sleeve core design method according to the type of the dry-type sleeve, the lengths and the radiuses of the dry-type sleeve core zero-layer polar plate and the end-layer polar plate and the total number of the dry-type sleeve core polar plates;
The finite element calculation module is used for establishing a dry-type casing model by using finite element software, substituting structural parameters of the dry-type casing into the dry-type casing model for material performance definition and grid division, and then carrying out simulation calculation to obtain a dry-type casing core electric field intensity distribution diagram, a dry-type casing core voltage distribution diagram, a dry-type casing core capacitance distribution diagram, a dry-type casing core voltage division ratio distribution diagram, a dry-type casing core radial electric field intensity and a dry-type casing core axial electric field intensity curve diagram;
the dry-type sleeve capacitor core parameter judging module is used for analyzing a dry-type sleeve core electric field intensity distribution diagram, a dry-type sleeve core voltage distribution diagram, a dry-type sleeve core capacitor distribution diagram, a dry-type sleeve core voltage division ratio distribution diagram, a dry-type sleeve core radial electric field intensity and an axial electric field intensity curve diagram, and judging whether the dry-type sleeve core electric field intensity distribution reflected by the dry-type sleeve core electric field intensity distribution diagram, the dry-type sleeve core voltage distribution reflected by the dry-type sleeve core voltage distribution diagram, the dry-type sleeve core capacitor distribution reflected by the dry-type sleeve core capacitor distribution diagram, the dry-type sleeve core voltage division ratio distribution reflected by the dry-type sleeve core voltage division ratio distribution diagram, the dry-type sleeve core radial electric field intensity reflected by the dry-type sleeve core radial electric field intensity curve diagram, and whether the dry-type sleeve core axial electric field intensity reflected by the dry-type sleeve core axial electric field intensity curve diagram meets the design requirement corresponding to the dry-type sleeve capacitor core .
The invention has the beneficial effects that:
according to the invention, firstly, required dry-type sleeve capacitor core structure parameters including a sleeve form and a calculation method, zero-last-two-layer polar plate length and radius and total number of polar plate layers are input in a dry-type sleeve parameter design interface realized by MATLAB/GUI software, detailed capacitor core structure parameters are obtained through calculation, then a finite element method is used for calculating relevant electrical parameters and displaying a processed result diagram, the electrical performance of the sleeve capacitor core is comprehensively considered, the dry-type sleeve capacitor core structure parameters are further optimized, the dry-type sleeve capacitor core structure parameter design efficiency can be effectively improved, and the dry-type sleeve capacitor core structure parameter design method has wide practicability.
The analytic method mainly simplifies a core model, the solution is carried out through a basic principle formula, certain deviation exists, the finite element method is based on a variational principle, the boundary value problem is converted into a variational problem, discretization processing is carried out by utilizing subdivision interpolation, and the calculation precision is fully guaranteed.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a functional and design flow diagram of the present invention;
FIG. 3 is a diagram of a platform home interface of the present invention.
The system comprises a dry-type sleeve type parameter setting module 1, a finite element calculation module 2, a dry-type sleeve capacitor core parameter judging module 3 and a dry-type sleeve capacitor core parameter adjusting module 4.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
the dry-type casing parameter design platform based on the finite element method as shown in fig. 1 to 3 comprises a dry-type casing parameter setting module 1, a finite element calculating module 2 and a dry-type casing capacitor core parameter judging module 3;
the dry-type sleeve structure parameter setting module 1 is used for determining the type of a dry-type sleeve, a dry-type sleeve core design method, the lengths and the radii of a zero-layer polar plate and an end-layer polar plate of the dry-type sleeve core (the zero-layer polar plate is an innermost-layer capacitor screen of the core, and the end-layer polar plate is an outermost-layer capacitor screen of the core), and the total number of layers of the dry-type sleeve core polar plate according to the type of the dry-type sleeve, the lengths and the radii of the zero-layer polar plate and the end-layer polar plate of the dry-type sleeve core, and the total number of layers of the dry-type sleeve core polar plate, and calculating the dry-type sleeve structure parameters by using the selected dry-type sleeve core design method, wherein the dry-type sleeve structure parameters comprise the lengths, the radii and the thicknesses of the polar plates of each layer of the dry-type sleeve capacitor core, and the differences between the upper and lower polar plates;
the finite element calculation module 2 is used for establishing a dry-type casing model (without specific dimensions) by using finite element software, substituting structural parameters of the dry-type casing into the dry-type casing model for material performance definition and grid division, and then carrying out simulation calculation to obtain a dry-type casing core electric field intensity distribution map, a dry-type casing core voltage distribution map, a dry-type casing core capacitance distribution map, a dry-type casing core voltage division ratio distribution map, a dry-type casing core radial electric field intensity and a dry-type casing core axial electric field intensity curve chart;
The dry-type sleeve capacitor core parameter judging module 3 is used for analyzing the dry-type sleeve core electric field intensity distribution map, the dry-type sleeve core voltage distribution map, the dry-type sleeve core capacitor distribution map, the dry-type sleeve core voltage distribution map, the dry-type sleeve core radial electric field intensity and the axial electric field intensity curve chart, and judging whether the dry-type sleeve core electric field intensity distribution reflected by the dry-type sleeve core electric field intensity distribution map, the dry-type sleeve core voltage distribution reflected by the dry-type sleeve core voltage distribution map, the dry-type sleeve core capacitor distribution reflected by the dry-type sleeve core capacitor distribution map, the dry-type sleeve core voltage distribution reflected by the dry-type sleeve core voltage distribution map, the dry-type sleeve core radial electric field intensity reflected by the dry-type sleeve core radial electric field intensity curve chart, and whether the dry-type sleeve core axial electric field intensity reflected by the dry-type sleeve core axial electric field intensity curve chart meets the design requirement corresponding to the dry-type sleeve capacitor core And (design specification related to the casing).
In the above technical solution, the dry-type bushing capacitor core parameter adjusting module 4 is further included, and the dry-type bushing capacitor core parameter adjusting module 4 is configured to control the dry-type bushing structure parameter setting module 1 to adjust the corresponding dry-type bushing structure parameter when the dry-type bushing capacitor core parameter judging module 3 judges that the design requirement corresponding to the dry-type bushing capacitor core is not satisfied, so that the adjusted dry-type bushing structure parameter is subjected to finite element calculation to obtain dry-type bushing core electric field strength distribution reflected by the dry-type bushing core electric field strength distribution diagram, dry-type bushing core voltage distribution reflected by the dry-type bushing core voltage distribution diagram, dry-type bushing core capacitance distribution reflected by the dry-type bushing core electric field strength distribution diagram, bushing core partial pressure ratio distribution reflected by the dry-type bushing core partial pressure ratio distribution diagram, dry-type bushing core radial electric field strength distribution reflected by the dry-type bushing core radial electric field strength distribution diagram, and the like, The axial electric field intensity of the dry-type sleeve core reflected by the axial electric field intensity curve chart of the dry-type sleeve core meets the corresponding design requirements of the dry-type sleeve capacitor core.
In the above technical solution, the dry-type bushing core design method includes an equal capacitance equal step equal thickness method, an equal capacitance unequal step equal thickness method, and an equal margin method.
In the above technical solution, the finite element calculation module 2 calls finite element software to run through the background (running an MATLAB statement, and the background starts the finite element software to perform simulation analysis), and performs simulation calculation to obtain a dry-type casing core electric field strength distribution map, a dry-type casing core voltage distribution map, a dry-type casing core capacitance distribution map, a dry-type casing core voltage division ratio distribution map, a dry-type casing core radial electric field strength and a dry-type casing core axial electric field strength curve map.
In the above technical solution, the dry type bushing includes a transformer bushing and a wall bushing.
A dry-type sleeve parameter design method based on a finite element method comprises the following steps:
step 1: determining the type of a dry-type sleeve, a dry-type sleeve core design method, the lengths and the radiuses of a zero-layer polar plate and a last-layer polar plate of the dry-type sleeve core and the total number of layers of the dry-type sleeve core polar plate according to the actual application occasion of the dry-type sleeve, and calculating the structural parameters of the dry-type sleeve by using the selected dry-type sleeve core design method according to the type of the dry-type sleeve, the lengths and the radiuses of the zero-layer polar plate and the last-layer polar plate of the dry-type sleeve core and the total number of layers of the dry-type sleeve core polar plate;
And 2, step: establishing a dry-type sleeve model by using finite element software, substituting structural parameters of the dry-type sleeve into the dry-type sleeve model to define material performance and divide grids, and then carrying out simulation calculation to obtain an electric field intensity distribution graph of a dry-type sleeve core, a dry-type sleeve core voltage distribution graph, a dry-type sleeve core capacitance distribution graph, a dry-type sleeve core partial pressure ratio distribution graph, a dry-type sleeve core radial electric field intensity and a dry-type sleeve core axial electric field intensity graph;
and 3, step 3: analyzing the distribution graph of the electric field intensity of the dry-type sleeve core, the distribution graph of the voltage of the dry-type sleeve core, the distribution graph of the capacitance of the dry-type sleeve core, the distribution graph of the partial pressure ratio of the dry-type sleeve core, the radial electric field intensity and the axial electric field intensity of the dry-type sleeve core, judging whether the electric field intensity distribution of the dry-type sleeve core reflected by the electric field intensity distribution diagram of the dry-type sleeve core, the voltage distribution of the dry-type sleeve core reflected by the voltage distribution diagram of the dry-type sleeve core, the capacitance distribution of the dry-type sleeve core reflected by the capacitance distribution diagram of the dry-type sleeve core, the partial pressure ratio distribution of the dry-type sleeve core reflected by the partial pressure ratio distribution diagram of the dry-type sleeve core, the radial electric field intensity of the dry-type sleeve core reflected by a radial electric field intensity curve diagram of the dry-type sleeve core and the axial electric field intensity of the dry-type sleeve core reflected by an axial electric field intensity curve diagram of the dry-type sleeve core meet the corresponding design requirements of the dry-type sleeve capacitor core or not;
And 4, step 4: when judging that the design requirement corresponding to the dry-type sleeve capacitor core is not met, adjusting corresponding dry-type sleeve structure parameters to enable dry-type sleeve core electric field intensity distribution reflected by a dry-type sleeve core electric field intensity distribution diagram, dry-type sleeve core voltage distribution reflected by a dry-type sleeve core voltage distribution diagram, dry-type sleeve core capacitor distribution reflected by a dry-type sleeve core capacitor distribution diagram, dry-type sleeve core voltage division ratio distribution reflected by a dry-type sleeve core voltage division ratio distribution diagram, dry-type sleeve core radial electric field intensity reflected by a dry-type sleeve core radial electric field intensity curve diagram and dry-type sleeve core axial electric field intensity reflected by a dry-type sleeve core axial electric field intensity curve diagram to meet the design requirement corresponding to the dry-type sleeve capacitor core.
In the specific implementation process of the invention;
firstly, in a frame 1 of fig. 3, setting type parameters of a 110kV transformer bushing capacitor core, selecting a 'transformer bushing' in a bushing form, selecting a 'grade difference' in a calculation method, selecting '1825 mm and 25 mm' in the length and radius of a zero-layer pole plate of a boundary condition, selecting '630 mm and 74.6 mm' in the length and radius of a last-layer pole plate, selecting '16 layers' in the number of pole plates, clicking a 'capacitor core parameter calculation' button to calculate structural parameters of the capacitor core and display the length, radius and thickness of each layer of pole plates and a difference value between the upper and lower two-stage pole plates;
Then, aiming at the initial detailed structural parameters of the sleeve capacitor core, clicking 'finite element simulation analysis' to perform finite element method simulation analysis, calling a program to run through a background, and displaying a finite element analysis result after calculation and processing are finished, wherein the finite element analysis result comprises a dry-type sleeve core electric field intensity distribution diagram, a dry-type sleeve core voltage distribution diagram, a dry-type sleeve core capacitor distribution diagram, a dry-type sleeve core voltage dividing ratio distribution diagram, a dry-type sleeve core radial electric field intensity and a dry-type sleeve core axial electric field intensity curve diagram, and the curve diagram is shown as a frame 2 in fig. 3;
analyzing the distribution graph of the electric field intensity of the dry-type sleeve core, the distribution graph of the voltage of the dry-type sleeve core, the distribution graph of the capacitance of the dry-type sleeve core, the distribution graph of the partial pressure ratio of the dry-type sleeve core, the radial electric field intensity and the axial electric field intensity of the dry-type sleeve core, judging whether the electric field intensity distribution of the dry-type sleeve core reflected by the electric field intensity distribution diagram of the dry-type sleeve core, the voltage distribution of the dry-type sleeve core reflected by the voltage distribution diagram of the dry-type sleeve core, the capacitance distribution of the dry-type sleeve core reflected by the capacitance distribution diagram of the dry-type sleeve core, the partial pressure ratio distribution of the dry-type sleeve core reflected by the partial pressure ratio distribution diagram of the dry-type sleeve core, the radial electric field intensity of the dry-type sleeve core reflected by a radial electric field intensity curve diagram of the dry-type sleeve core and the axial electric field intensity of the dry-type sleeve core reflected by an axial electric field intensity curve diagram of the dry-type sleeve core meet the corresponding design requirements of the dry-type sleeve capacitor core or not;
And finally, comprehensively considering the electrical performance of the sleeve capacitor core calculated by the finite element method, and further optimizing the structural parameters of the 110kV transformer sleeve capacitor core, so as to achieve the purpose of effectively improving the design efficiency of the structural parameters of the dry-type sleeve capacitor core.
Those not described in detail in this specification are well within the skill of the art.

Claims (7)

1. A dry-type sleeve parameter design platform based on finite element method, its characterized in that: the device comprises a dry-type sleeve type parameter setting module (1), a finite element calculation module (2) and a dry-type sleeve capacitor core parameter judgment module (3);
the dry-type sleeve structure parameter setting module (1) is used for determining the type of a dry-type sleeve, a dry-type sleeve core design method, the lengths and the radiuses of a dry-type sleeve core zero-layer polar plate and an end-layer polar plate and the total number of dry-type sleeve core polar plates according to the actual application occasion of the dry-type sleeve, and calculating the dry-type sleeve structure parameters by using the selected dry-type sleeve core design method according to the type of the dry-type sleeve, the lengths and the radiuses of the dry-type sleeve core zero-layer polar plate and the end-layer polar plate and the total number of the dry-type sleeve core polar plates;
the finite element calculation module (2) is used for establishing a dry-type sleeve model by using finite element software, substituting structural parameters of the dry-type sleeve into the dry-type sleeve model to define material performance and divide grids, and then carrying out simulation calculation to obtain an electric field intensity distribution map of a dry-type sleeve core, a dry-type sleeve core voltage distribution map, a dry-type sleeve core capacitance distribution map, a dry-type sleeve core partial pressure ratio distribution map, a dry-type sleeve core radial electric field intensity and a dry-type sleeve core axial electric field intensity curve map;
The dry-type sleeve capacitor core parameter judging module (3) is used for analyzing a dry-type sleeve core electric field intensity distribution diagram, a dry-type sleeve core voltage distribution diagram, a dry-type sleeve core capacitor distribution diagram, a dry-type sleeve core voltage distribution diagram, a dry-type sleeve core radial electric field intensity and an axial electric field intensity curve chart, and judging whether the dry-type sleeve core electric field intensity distribution reflected by the dry-type sleeve core electric field intensity distribution diagram, the dry-type sleeve core voltage distribution reflected by the dry-type sleeve core voltage distribution diagram, the dry-type sleeve core capacitor distribution reflected by the dry-type sleeve core capacitor distribution diagram, the dry-type sleeve core voltage distribution reflected by the dry-type sleeve core voltage distribution diagram, the dry-type sleeve core radial electric field intensity reflected by the dry-type sleeve core radial electric field intensity curve chart, and the dry-type sleeve core axial electric field intensity reflected by the dry-type sleeve core axial electric field intensity curve chart meet the corresponding set dry-type sleeve capacitor core or not And (4) measuring the requirements.
2. The finite element method-based dry casing parameter design platform of claim 1, wherein: the dry-type sleeve capacitor core parameter adjusting module (4) is further included, and the dry-type sleeve capacitor core parameter adjusting module (4) is used for controlling the dry-type sleeve structure parameter setting module (1) to adjust corresponding dry-type sleeve structure parameters when the dry-type sleeve capacitor core parameter judging module (3) judges that the design requirements corresponding to the dry-type sleeve capacitor core are not met, so that the dry-type sleeve core electric field intensity distribution reflected by the dry-type sleeve core electric field intensity distribution diagram, the dry-type sleeve core voltage distribution reflected by the dry-type sleeve core voltage distribution diagram, the dry-type sleeve core capacitor distribution reflected by the dry-type sleeve core capacitor distribution diagram, the dry-type sleeve core partial pressure ratio distribution reflected by the dry-type sleeve core partial pressure ratio distribution diagram, the dry-type sleeve core radial electric field intensity distribution diagram reflected by the dry-type sleeve core radial electric field intensity distribution diagram, the dry-type sleeve capacitor distribution diagram and the dry-type sleeve capacitor distribution diagram are obtained by finite element calculation, The axial electric field intensity of the dry-type sleeve core reflected by the axial electric field intensity curve chart of the dry-type sleeve core meets the corresponding design requirements of the dry-type sleeve capacitor core.
3. The finite element method-based dry casing parameter design platform of claim 1, wherein: the dry-type sleeve core design method comprises an equal-capacitance equal-step unequal thickness method, an unequal-capacitance equal-step equal thickness method and an equal-margin method.
4. The finite element method-based dry casing parameter design platform of claim 1, wherein: the finite element calculation module (2) calls finite element software to operate through a background, and carries out simulation calculation to obtain a dry-type sleeve core electric field intensity distribution diagram, a dry-type sleeve core voltage distribution diagram, a dry-type sleeve core capacitance distribution diagram, a dry-type sleeve core voltage division ratio distribution diagram, a dry-type sleeve core radial electric field intensity and a dry-type sleeve core axial electric field intensity curve diagram.
5. The dry-type casing parameter design platform based on finite element method of claim 1, wherein: the dry-type bushing comprises a transformer bushing and a wall bushing.
6. The dry-type casing parameter design platform based on finite element method of claim 1, wherein: the structural parameters of the dry-type sleeve comprise the length, the radius and the thickness of each layer of polar plate of the dry-type sleeve capacitor core body and the difference between the upper and lower two-stage polar plates.
7. A dry-type sleeve parameter design method based on a finite element method is characterized by comprising the following steps:
step 1: determining the type of a dry-type sleeve, a dry-type sleeve core design method, the lengths and the radiuses of a zero-layer polar plate and a last-layer polar plate of the dry-type sleeve core and the total number of layers of the dry-type sleeve core polar plate according to the actual application occasion of the dry-type sleeve, and calculating the structural parameters of the dry-type sleeve by using the selected dry-type sleeve core design method according to the type of the dry-type sleeve, the lengths and the radiuses of the zero-layer polar plate and the last-layer polar plate of the dry-type sleeve core and the total number of layers of the dry-type sleeve core polar plate;
step 2: establishing a dry-type casing model by using finite element software, substituting structural parameters of the dry-type casing into the dry-type casing model to define material performance and divide grids, and then carrying out simulation calculation to obtain a dry-type casing core electric field intensity distribution diagram, a dry-type casing core voltage distribution diagram, a dry-type casing core capacitance distribution diagram, a dry-type casing core voltage division ratio distribution diagram, a dry-type casing core radial electric field intensity and a dry-type casing core axial electric field intensity curve diagram;
and step 3: analyzing the distribution diagram of the electric field intensity of the core of the dry-type casing, the distribution diagram of the core voltage of the dry-type casing, the distribution diagram of the core capacitance of the dry-type casing, the distribution diagram of the partial pressure ratio of the core of the dry-type casing, the radial electric field intensity and the axial electric field intensity curve diagram of the core of the dry-type casing, judging whether the electric field intensity distribution of the dry-type sleeve core reflected by the electric field intensity distribution diagram of the dry-type sleeve core, the voltage distribution of the dry-type sleeve core reflected by the voltage distribution diagram of the dry-type sleeve core, the capacitance distribution of the dry-type sleeve core reflected by the capacitance distribution diagram of the dry-type sleeve core, the voltage distribution of the dry-type sleeve core reflected by the voltage distribution diagram of the dry-type sleeve core, the radial electric field intensity of the dry-type sleeve core reflected by the radial electric field intensity curve diagram of the dry-type sleeve core and the axial electric field intensity of the dry-type sleeve core reflected by the axial electric field intensity curve diagram of the dry-type sleeve core meet the corresponding design requirements of the dry-type sleeve capacitor core;
And 4, step 4: when judging that the design requirement corresponding to the dry-type sleeve capacitor core is not met, adjusting corresponding dry-type sleeve structure parameters to enable dry-type sleeve core electric field intensity distribution reflected by a dry-type sleeve core electric field intensity distribution diagram, dry-type sleeve core voltage distribution reflected by a dry-type sleeve core voltage distribution diagram, dry-type sleeve core capacitor distribution reflected by a dry-type sleeve core capacitor distribution diagram, dry-type sleeve core voltage division ratio distribution reflected by a dry-type sleeve core voltage division ratio distribution diagram, dry-type sleeve core radial electric field intensity reflected by a dry-type sleeve core radial electric field intensity curve diagram and dry-type sleeve core axial electric field intensity reflected by a dry-type sleeve core axial electric field intensity curve diagram to meet the design requirement corresponding to the dry-type sleeve capacitor core.
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