1. The utility model provides a dry-type sleeve pipe parameter design platform based on finite element method which 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, the dry-type sleeve core design method, the lengths and the radiuses of a dry-type sleeve core zero-layer polar plate and a dry-type sleeve core polar plate 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 dry-type sleeve structure parameters according to the dry-type sleeve type, the lengths and the radiuses of the dry-type sleeve core zero-layer polar plate and the dry-type sleeve core polar plate and the total number of layers of the dry-type sleeve core polar plate by using the selected dry-type sleeve core design method;

the finite element calculation module (2) 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 performing 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 (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 division ratio 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 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 chart and the dry-type sleeve core axial electric field intensity curve chart meet the set electric field intensity corresponding to the dry-type sleeve capacitor core or not And (6) measuring the requirements.

2. The dry-type casing parameter design platform based on finite element method 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 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 distribution diagram, the dry-type sleeve core electric field intensity distribution diagram, the dry-type sleeve capacitor distribution diagram, and the dry-type sleeve capacitor distribution diagram, 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 requirement of the dry-type sleeve capacitor core.

3. The dry-type casing parameter design platform based on finite element method 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 dry-type casing parameter design platform based on finite element method 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 includes 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: and 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.

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 lead the radial field intensity E of the capacitor core to be_rAnd axial field strength E_lThe distribution is uniform, thereby improving the insulating strength of the sleeve. The structural dimension 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 provides 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 type 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, a dry-type sleeve core design method, the lengths and the radiuses of a dry-type sleeve core zero-layer polar plate and a last-layer polar plate 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 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 last-layer polar plate and the total number of layers of the dry-type sleeve core polar plate;

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:

the method comprises the steps of firstly inputting required dry-type sleeve capacitor core structure parameters including a sleeve form and a calculation method, zero-end two-layer pole plate length and radius and the total number of pole plate layers in a dry-type sleeve parameter design interface realized by MATLAB/GUI software, obtaining detailed capacitor core structure parameters through calculation, calculating relevant electrical parameters by using a finite element method, displaying a processed result diagram, comprehensively considering the electrical performance of the 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.

The analytical method mainly simplifies the core model, solves the problem through a basic principle formula, has certain deviation, and the finite element method converts the edge value problem into the variational problem on the basis of the variational principle, and performs discretization processing by utilizing subdivision interpolation, thereby fully ensuring the calculation precision.

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 main interface according to 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 judgment 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:

as shown in fig. 1 to 3, the platform for designing dry type casing parameters based on the finite element method comprises a dry type casing parameter setting module 1, a finite element calculating module 2, and a dry type casing capacitive 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 radiuses of a zero-layer polar plate and a last-layer polar plate of the dry-type sleeve core (the zero-layer polar plate is the innermost layer capacitive screen of the core, and the last-layer polar plate is the outermost layer capacitive screen of the 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 according to the dry-type sleeve type, the lengths and the radiuses of the zero-layer polar plate and the last-layer polar plate of the dry-type sleeve core, wherein the dry-type sleeve structure parameters comprise the lengths, the radiuses and the thicknesses of the polar plates of all layers 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 size) 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 performing 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 casing capacitor core parameter judging module 3 is used for analyzing a dry-type casing core electric field intensity distribution diagram, a dry-type casing core voltage distribution diagram, a dry-type casing core capacitor distribution diagram, a dry-type casing core voltage division ratio distribution diagram, a dry-type casing core radial electric field intensity and an axial electric field intensity curve chart, and judging whether the dry-type casing core electric field intensity distribution reflected by the dry-type casing core electric field intensity distribution diagram, the dry-type casing core voltage distribution reflected by the dry-type casing core voltage distribution diagram, the dry-type casing core capacitor distribution reflected by the dry-type casing core capacitor distribution diagram, the dry-type casing core voltage division ratio distribution reflected by the dry-type casing core voltage division ratio distribution diagram, the dry-type casing core radial electric field intensity reflected by the dry-type casing core radial electric field intensity curve chart, and whether the dry-type casing core axial electric field intensity reflected by the dry-type casing core axial electric field intensity curve chart meets the design requirement corresponding to the dry-type casing capacitor core And (casing pipe related design specification).

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 requirement of the dry-type sleeve capacitor core.

In the technical scheme, 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.

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;

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: and 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 zero-layer plate length and radius of boundary conditions, selecting '630 mm and 74.6 mm' in last-layer plate length and radius, selecting '16 layers' in the number of plate layers, clicking a 'capacitor core parameter calculation' button to calculate capacitor core structure parameters and display the length, radius and thickness of each layer of plate and the difference value of the upper and lower two-stage plates;

then, aiming at the initial detailed structural parameters of the capacitor core of the sleeve, 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 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, and the curve diagram is shown as a frame 2 in fig. 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 finally, comprehensively considering the electrical performance of the sleeve capacitor core calculated by finite element method simulation, further optimizing the structural parameters of the 110kV transformer sleeve capacitor core, and achieving the purpose of effectively improving the design efficiency of the structural parameters of the dry-type sleeve capacitor core.

Details not described in this specification are within the skill of the art that are well known to those skilled in the art.