GIS disconnecting switch shell induced voltage simulation method and system

Abstract

The invention discloses a GIS isolation switch shell induced voltage simulation method and system, and relates to the technical field of power equipment and electromagnetic field simulation, and the method comprises the steps: building a GIS isolation switch shell induced voltage simulation model; performing network division on the GIS disconnecting switch shell induced voltage simulation model; setting a boundary and loading excitation; solving magnetic field intensity distribution; constructing an equivalent circuit, and calculating the induced voltage of the shell; and setting an early warning model to carry out equivalent early warning on the induced voltage of the shell. By establishing an accurate GIS isolating switch shell induced voltage simulation model and combining quantitative analysis of an electromagnetic field and equivalent circuit calculation, the induced voltage change of the GIS isolating switch in a high-voltage environment can be accurately predicted, and the induced voltage can be dynamically evaluated through a real-time monitoring and early warning model, so that the accuracy of the GIS isolating switch shell induced voltage simulation model is improved. Early warning of the equipment state is achieved, and equipment faults or potential safety hazards caused by the fact that the induced voltage exceeds the standard are effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of power equipment and electromagnetic field simulation, and in particular to a method and system for simulating an induction voltage of a GIS isolating switch housing. Background Art

[0002] In recent years, gas-insulated switchgear (GIS) has been widely used in power systems. Gas-insulated switchgear (GIS) is a key equipment in high-voltage power grid construction. It encapsulates busbars, circuit breakers, disconnectors, grounding switches, lightning arresters, voltage and current transformers and other devices in a metal aluminum shell, and is filled with sulfur hexafluoride gas with good insulation and arc extinguishing capabilities, which significantly increases the power supply capacity and alleviates the problem of easy damage to high-voltage equipment.

[0003] Since the shell of GIS is grounded, ideally, the shell maintains ground potential. But in fact, there is electromagnetic coupling between the busbar and the metal shell. When current flows through the busbar, an induced electromotive force will be generated on the metal shell, which will cause the shell to no longer maintain ground potential, but to rise to a considerable degree. If the maximum short circuit occurs outside the station, a strong short-circuit current will flow through the busbar. At this time, the induced voltage on the shell will be more significant, which may pose a threat to personal safety. Therefore, it is necessary to conduct a systematic study on the shell induced voltage to provide a theoretical basis and reference for the production and operation departments of GIS, so as to improve the reliability of the power system and ensure the safe operation of the power system. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] Therefore, the technical problem solved by the present invention is: in response to the problem of shell induced voltage that may be generated by electromagnetic field induction in GIS disconnectors under high voltage environments, a comprehensive solution based on electromagnetic field simulation and early warning models is proposed. The solution can evaluate the risk of shell induced voltage through precise electromagnetic field analysis and voltage simulation calculations, and provide level warnings based on real-time measurement data and prediction results, thereby effectively preventing equipment failures or safety hazards caused by excessive induced voltage.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a GIS disconnector housing induction voltage simulation method, which comprises the following steps:

[0007] Establish a simulation model of the induced voltage on the shell of the GIS disconnector; divide the network of the simulation model of the induced voltage on the shell of the GIS disconnector; set the boundary and load the excitation; solve the magnetic field intensity distribution; construct an equivalent circuit and calculate the shell induced voltage; set up an early warning model to provide equivalent early warning for the shell induced voltage.

[0008] As a preferred solution of the GIS disconnector housing induction voltage simulation method described in the present invention, the contact resistance thermal conductivity in the GIS disconnector housing induction voltage simulation model is expressed as:

[0009]

[0010] Where ρ represents resistivity, L represents the Lorentz constant, and T represents the thermodynamic temperature.

[0011] In the establishment of the GIS disconnector housing induced voltage simulation model, the electromagnetic field is analyzed by using the Maxwell equations.

[0012] As a preferred solution of the GIS disconnector housing induced voltage simulation method described in the present invention, wherein: the Maxwell equations are expressed as:

[0013]

[0014] Among them, H represents magnetic field intensity, J represents current density, D represents electric flux density, B represents electric field intensity, B represents magnetic flux, E represents electric field intensity, ρ e represents the charge density.

[0015] The magnetic field strength is expressed as,

[0016]

[0017] The electric field strength is expressed as,

[0018]

[0019] Where A represents the vector magnetic potential, Represents a scalar potential.

[0020] As a preferred solution of the GIS disconnector housing induced voltage simulation method described in the present invention, the electromagnetic field is described as follows:

[0021]

[0022] Among them, Ω1 represents the eddy current area, and Ω2 represents the non-eddy current area.

[0023] As a preferred solution of the method for simulating the induced voltage of the GIS disconnector housing described in the present invention, the mesh size of each part is analyzed and set before network division, and after the mesh division is completed, the boundary conditions and loading excitation are set.

[0024] The boundary condition is to set magnetic field line parallel boundaries for the six faces of the cuboid air bag.

[0025] As a preferred solution of the method for simulating the induced voltage of the GIS disconnector housing described in the present invention, the boundary conditions include Dirichlet boundary conditions, Neumann boundary conditions and mixed boundary conditions.

[0026] The Dirichlet boundary condition is expressed as,

[0027]

[0028] Among them, Γ1 represents the first type of boundary line or surface, and f1(x, y, z) represents a known function.

[0029] The Neumann boundary condition is expressed as,

[0030]

[0031] Among them, Γ2 represents the second type of boundary line or surface, n represents the external normal vector on the boundary, and f2(x, y, z) represents a known function.

[0032] The mixed boundary condition is expressed as,

[0033]

[0034] Wherein, Γ3 represents the third type of boundary line or surface, and f3(x, y, z) represents a known function.

[0035] The loading excitation is to load a current excitation of 3150A rated current on the ABC three-phase conductor, the three phases are respectively delayed by 120°, the frequency is the rated frequency 50Hz, one end of the conductor is selected to set the node voltage coupling, and the other end is set to the reference voltage zero potential.

[0036] As a preferred solution of the GIS disconnector housing induced voltage simulation method described in the present invention, the setting of the early warning model includes setting the set of detected induced voltages as D, the real-time measured induced voltage value as X, the predicted value distribution as Y, and obtaining the probability distribution, which is expressed as:

[0037]

[0038] Where P(Y|X,W) represents the probability distribution of output Y given the weight W and input X. The weight distribution p(W|D) is modeled based on the set D of detected induced voltages. Then, m induced voltage samples that obey the p(W|D) distribution are sampled by the Monte Carlo method to calculate Then we can get p(Y|X).

[0039] According to the early warning model, the shell induced voltage is warned at different levels, the risk level is marked, the reconstruction error threshold T is set, and the samples are divided into different risk levels according to the reconstruction error. Suppose the risk level is N i , expressed as,

[0040]

[0041] Among them, T low represents the minimum reconstruction error threshold, T high Represents the maximum reconstruction error threshold.

[0042] Another object of the present invention is to provide a GIS disconnect switch housing induced voltage simulation system, which can calculate the housing induced voltage by establishing an accurate electromagnetic field simulation model, performing network division and loading excitation, and combining the early warning model to perform real-time voltage monitoring and risk assessment, thereby solving the problem in the prior art that the GIS disconnect switch housing induced voltage cannot be accurately predicted and monitored in real time, and there is a lack of an effective early warning mechanism.

[0043] To solve the above technical problems, the present invention provides the following technical solutions: a GIS disconnector shell induced voltage simulation system, including a simulation model building module, a network division module, an electromagnetic field calculation module, an equivalent circuit construction module, and an early warning model setting module.

[0044] The simulation model building module is used to build a simulation model of the induced voltage of the GIS disconnector housing.

[0045] The network partitioning module performs network partitioning on the simulation model, sets boundary and excitation conditions, and performs numerical solution.

[0046] The electromagnetic field calculation module solves the distribution of magnetic field intensity and electric field intensity.

[0047] The equivalent circuit construction module constructs an equivalent circuit according to the electromagnetic field result and calculates the shell induced voltage.

[0048] The early warning model setting module sets the early warning model, including monitoring and prediction of induced voltage and probability distribution sampling based on the Monte Carlo method.

[0049] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned method for simulating the induced voltage of a GIS disconnect switch housing when executing the computer program.

[0050] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned method for simulating the induced voltage of a GIS disconnect switch housing.

[0051] The beneficial effects of the present invention are as follows: by establishing an accurate GIS disconnect switch housing induced voltage simulation model, combined with the quantitative analysis of the electromagnetic field and the equivalent circuit calculation, not only can the induced voltage changes of the GIS disconnect switch in a high voltage environment be accurately predicted, but also the induced voltage can be dynamically evaluated through the real-time monitoring and early warning model, thereby achieving early warning of the equipment status, effectively preventing equipment failures or safety hazards caused by excessive induced voltage, thereby improving the safety and reliability of power equipment and reducing the cost of maintenance and accident handling. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0053] Figure 1 An overall flow chart of a method for simulating induced voltage of a GIS disconnect switch housing provided in the first embodiment of the present invention.

[0054] Figure 2 A magnetic field intensity distribution diagram of a housing in a method for simulating an induced voltage of a GIS disconnect switch housing provided in the first embodiment of the present invention.

[0055] Figure 3 A distribution diagram of the magnetic field intensity of a conductor in a method for simulating an induced voltage of a GIS disconnect switch housing provided in the first embodiment of the present invention.

[0056] Figure 4 A conductor current density distribution diagram in a GIS disconnect switch housing induced voltage simulation method provided in the first embodiment of the present invention.

[0057] Figure 5 A shell current density distribution diagram in a GIS disconnector shell induced voltage simulation method provided in the first embodiment of the present invention.

[0058] Figure 6 An overall framework diagram of a GIS disconnect switch housing induced voltage simulation system provided in the second embodiment of the present invention. DETAILED DESCRIPTION

[0059] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0060] Example 1, reference Figure 1 to Figure 5 , is an embodiment of the present invention, and provides a method for simulating the induction voltage of a GIS disconnector housing, characterized in that:

[0061] S1: Establish a simulation model of the induced voltage of the GIS disconnector housing.

[0062] The contact resistance thermal conductivity in the GIS disconnector shell induced voltage simulation model is expressed as:

[0063]

[0064] Where ρ represents resistivity, L represents the Lorentz constant, and T represents the thermodynamic temperature.

[0065] In establishing the GIS disconnector shell induced voltage simulation model, the electromagnetic field is analyzed through Maxwell equations.

[0066] Maxwell's equations are expressed as,

[0067]

[0068] Among them, H represents magnetic field intensity, J represents current density, D represents electric flux density, B represents electric field intensity, B represents magnetic flux, E represents electric field intensity, ρ e represents the charge density;

[0069] When solving electromagnetic field problems, H and E cannot be directly calculated. Vector magnetic potential A and scalar potential must be used. to calculate.

[0070] The magnetic field strength is expressed as,

[0071]

[0072] The electric field strength is expressed as,

[0073]

[0074] Where A represents the vector magnetic potential, Represents a scalar potential.

[0075] The fixed solution description of the electromagnetic field is expressed as:

[0076]

[0077]

[0078] Among them, Ω1 represents the eddy current area, and Ω2 represents the non-eddy current area.

[0079] The skin effect of current refers to the fact that when an alternating current or an alternating magnetic field passes through a conductor, the current in the conductor is no longer evenly distributed, but is concentrated on the surface of the conductor. The proximity effect of current refers to the phenomenon that alternating currents approach adjacent conductors, which makes the conductor distribution uneven. In the electromagnetic field simulation calculation of GIS disconnectors, the skin effect and proximity effect of current need to be considered. These two phenomena have the following effects on the electromagnetic field simulation calculation of GIS disconnectors: Considering the skin depth caused by the skin effect, it is necessary to ensure that there are enough grid nodes within the skin depth, that is, the maximum unit size of the grid division is smaller than the skin depth, to ensure that the simulation calculation takes into account the additional loss caused by the skin effect, thereby reducing the calculation error.

[0080] The calculation formula for skin depth is:

[0081]

[0082] Where d is the skin depth in m, ω is the current frequency in Hz, μ is the magnetic permeability of the material in H / m, and γ is the electrical conductivity of the material in S / m.

[0083] S2: Network division of the GIS disconnector shell induced voltage simulation model.

[0084] Before segmenting the GIS disconnect switch model, analyze and set the mesh size of each part. The mesh size of structures that have little effect on the simulation results should be appropriately increased, such as the shell, cover, flange, insulation disk, air bag and SF6 in the internal cavity. The mesh size of structures that have a greater impact on the simulation results should be appropriately reduced, such as conductors, contacts, contact fingers and contact resistance. In addition, for metal structures such as shells, conductors and contacts, the effects of skin effect and proximity effect should also be considered. According to the formula, it can be calculated that the skin depth of the shell and conductor is about 15mm, and the skin depth of the moving contact is about 10mm. For the shell, the shell thickness is 12mm, and its thickness is less than its skin depth, so the skin effect is not obvious and can be ignored. For the conductor, the diameter of the conductor is 80mm. The skin depth needs to be considered when setting the unit size, which is set to 8mm. For the moving contact, its diameter is 52mm, and the skin depth also needs to be considered when setting the unit size, which is set to 5mm.

[0085] Before network division, analyze and set the mesh size of each part. After mesh division is completed, set boundary conditions and load excitation.

[0086] S3: Set boundaries and load stimulus.

[0087] The boundary condition is to set magnetic field line parallel boundaries on the six faces of the rectangular air bag.

[0088] Boundary conditions include Dirichlet boundary conditions, Neumann boundary conditions and mixed boundary conditions.

[0089] The Dirichlet boundary condition is expressed as,

[0090]

[0091] Among them, Γ1 represents the first type of boundary line or surface, and f1(x, y, z) represents a known function.

[0092] The Neumann boundary condition is expressed as,

[0093]

[0094] Among them, Γ2 represents the second type of boundary line or surface, n represents the external normal vector on the boundary, and f2(x, y, z) represents a known function.

[0095] The mixed boundary condition is expressed as,

[0096]

[0097] Wherein, Γ3 represents the third type of boundary line or surface, and f3(x, y, z) represents a known function.

[0098] The loading excitation is to load the ABC three-phase conductor with a current excitation of a rated current of 3150A. The three phases lag by 120° respectively, and the frequency is the rated frequency of 50Hz. One end of the conductor is selected to set the node voltage coupling, and the other end is set to the reference voltage zero potential.

[0099] S4: Solve the magnetic field intensity distribution.

[0100] After meshing, loading excitation, and setting boundaries for the GIS disconnector model, the simulation results are as follows: Figure 2 , Figure 3 , Figure 4 as well as Figure 5 shown.

[0101] from Figure 2From the magnetic field intensity distribution diagram of the shell, it can be seen that the magnetic field intensity is larger in the area close to the conductor, and the magnetic field intensity is larger on the upper and lower surfaces of the shell. This is because the closer the area is to the conductor, the more obvious the magnetic induction effect is, which makes the magnetic field intensity in these areas larger, that is, the magnetic field intensity is larger on the upper surface of the shell close to conductor A and the lower surface of the shell close to conductor C. Figure 2 (a) is the overall distribution diagram of the magnetic field intensity of the shell. Figure 2 (b) is a top view of the magnetic field intensity distribution of the shell.

[0102] from Figure 3 The conclusion drawn from the magnetic field intensity distribution of the conductor is that the magnetic field intensity distribution of the three-phase conductor is not the same, and the overall magnetic field intensity of the A-phase and C-phase conductors is greater than the overall magnetic field intensity of the B-phase conductor. There are two reasons for this uneven distribution. The first reason is that the spatial structure layout of the three-phase conductors is not exactly the same; the second reason is that the three-phase conductors are affected by the skin effect and the proximity effect, and the current distribution is uneven, which leads to uneven distribution of the induced magnetic field. Figure 3 (a) is the overall diagram of the magnetic field intensity distribution of the conductor. Figure 3 (b) is the left view of the conductor magnetic field intensity distribution.

[0103] like Figure 4 The conductor current density distribution diagram shows that the surface current density of the three-phase conductor is relatively large, and the area with the largest current density is around the contact resistance. After the three-phase conductor is connected to the alternating current, the charges are mostly concentrated on the surface of the conductor due to the skin effect and the proximity effect, so the current density on the surface of the conductor is relatively large. When the current flows through the contact resistance, the conductive path suddenly decreases sharply, causing the current density of the contact resistance part to suddenly increase. Figure 5 There is a corresponding relationship between the distribution of shell current density and the distribution of magnetic field strength. The current density is larger in the area close to the conductor because the electromagnetic induction effect is strongest in this area.

[0104] S5: Construct an equivalent circuit and calculate the shell induced voltage.

[0105] Construct an equivalent circuit and calculate the induced voltage on the shell. Combined with the relevant component parameters, use the simulink module in Matlab to calculate the induced potential generated on the shell under normal conditions → input the induced potential into the EMTP model → obtain the induced voltage; Combined with the relevant component parameters, use Matlab programming to calculate the induced potential generated on the shell under short-circuit steady-state conditions → input the induced potential into the EMTP model → obtain the induced voltage; In order to simplify the model and improve the accuracy of the calculation, this paper uses Matlab programming, combined with the component parameters above, to calculate the induced potential on the shell under normal conditions and short-circuit steady-state conditions, and then input it into the EMTP model, and finally calculate the induced voltage on the shell.

[0106] An induction voltage sensor is arranged on the shell to collect data of the induction voltage, and the collected data is transmitted to a data server, and the data server performs data analysis on the transmitted data.

[0107] S6: Setting the early warning model to provide an equivalent early warning for the shell induced voltage.

[0108] Setting up the early warning model includes assuming that the set of detected induced voltages is D, the real-time measured induced voltage value is X, the predicted value distribution is Y, and the probability distribution is obtained, which is expressed as:

[0109]

[0110] Where P(Y|X,W) represents the probability distribution of output Y given the weight W and input X. The weight distribution p(W|D) is modeled based on the set D of detected induced voltages. Then, m induced voltage samples that obey the p(W|D) distribution are sampled by the Monte Carlo method to calculate Then we can get p(Y|X).

[0111] According to the early warning model, the shell induced voltage is warned at different levels, the risk level is marked, the reconstruction error threshold T is set, and the samples are divided into different risk levels according to the reconstruction error. Suppose the risk level is N i , expressed as,

[0112]

[0113] Among them, T low represents the minimum reconstruction error threshold, T high Represents the maximum reconstruction error threshold.

[0114] By first simulating the magnetic field distribution and current density of the isolating switch casing and conductor, it was found that the induced voltage would have a certain impact on personal safety. Then, by calculating and predicting the induced voltage in Simulink, the safety problem of the isolating switch casing caused by the induced voltage was solved to a large extent.

[0115] Example 2, reference Figure 6 , which is an embodiment of the present invention, provides a system for GIS disconnector housing induced voltage simulation method, characterized in that it includes a simulation model building module 100, a network division module 200, an electromagnetic field calculation module 300, an equivalent circuit construction module 400, and an early warning model setting module 500.

[0116] The simulation model building module 100 is used to build a simulation model of the induced voltage of the GIS disconnector housing.

[0117] The network partitioning module 200 performs network partitioning on the simulation model, sets boundary and excitation conditions, and performs numerical solution.

[0118] The electromagnetic field calculation module 300 calculates the distribution of magnetic field intensity and electric field intensity.

[0119] The equivalent circuit construction module 400 constructs an equivalent circuit according to the electromagnetic field result and calculates the shell induced voltage.

[0120] The early warning model setting module 500 sets the early warning model, including monitoring and prediction of the induced voltage and probability distribution sampling based on the Monte Carlo method.

[0121] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program code.

[0122] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0123] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0124] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0125] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for simulating the induction voltage of a GIS disconnector housing, characterized in that: include: Establish a simulation model of induced voltage on the housing of GIS disconnector; Network division of the GIS disconnector housing induced voltage simulation model; Set boundaries and load incentives; Solve the magnetic field intensity distribution; Construct an equivalent circuit and calculate the shell induced voltage; The early warning model is set to provide equivalent early warning for the shell induced voltage.

2. A GIS disconnect switch housing induction voltage simulation method as claimed in claim 1, characterized in that: The contact resistance thermal conductivity in the GIS disconnector housing induced voltage simulation model is expressed as: Where ρ represents resistivity, L represents the Lorentz constant, and T represents the thermodynamic temperature; In the establishment of the GIS disconnector housing induced voltage simulation model, the electromagnetic field is analyzed by using the Maxwell equations.

3. A method for simulating induced voltage of a GIS disconnector housing as claimed in claim 2, characterized in that: The Maxwell equations are expressed as, Among them, H represents magnetic field intensity, J represents current density, D represents electric flux density, B represents electric field intensity, B represents magnetic flux, E represents electric field intensity, ρ e represents the charge density; The magnetic field strength is expressed as, The electric field strength is expressed as, Where A represents the vector magnetic potential, Represents a scalar potential.

4. A method for simulating induced voltage of a GIS disconnector housing as claimed in claim 3, characterized in that: The electromagnetic field can be described by the formula: Among them, Ω1 represents the eddy current area, and Ω2 represents the non-eddy current area.

5. A method for simulating induced voltage of a GIS disconnector housing as claimed in claim 4, characterized in that: Before the network division is performed, the mesh size of each part is analyzed and set, and after the mesh division is completed, the boundary conditions and loading excitation are set; The boundary condition is to set magnetic field line parallel boundaries for the six faces of the cuboid air bag.

6. A method for simulating induced voltage of a GIS disconnector housing as claimed in claim 5, characterized in that: The boundary conditions include Dirichlet boundary conditions, Neumann boundary conditions and mixed boundary conditions; The Dirichlet boundary condition is expressed as, Where, Γ1 represents the first type of boundary line or surface, f1(x, y, z) represents a known function; The Neumann boundary condition is expressed as, Wherein, Γ2 represents the second type of boundary line or surface, n represents the external normal vector on the boundary, and f2(x, y, z) represents a known function; The mixed boundary condition is expressed as, Wherein, Γ3 represents the third type of boundary line or surface, and f3(x, y, z) represents a known function; The loading excitation is to load a current excitation of 3150A rated current on the ABC three-phase conductor, the three phases are respectively delayed by 120°, the frequency is the rated frequency 50Hz, one end of the conductor is selected to set the node voltage coupling, and the other end is set to the reference voltage zero potential.

7. A method for simulating induced voltage of a GIS disconnector housing as claimed in claim 6, characterized in that: The setting of the early warning model includes assuming that the set of detected induced voltages is D, the induced voltage value measured in real time is X, the predicted value distribution is Y, and the probability distribution is obtained, which is expressed as: Where P(Y|X,W) represents the probability distribution of output Y given the weight W and input X. The weight distribution p(W|D) is modeled based on the set D of detected induced voltages. Then, m induced voltage samples that obey the p(W|D) distribution are sampled by the Monte Carlo method to calculate Then we can get p(Y|X); According to the early warning model, the shell induced voltage is warned at different levels, the risk level is marked, the reconstruction error threshold T is set, and the samples are divided into different risk levels according to the reconstruction error. Suppose the risk level is N i , expressed as, Among them, T low represents the minimum reconstruction error threshold, T high Represents the maximum reconstruction error threshold.

8. A system using a GIS disconnector housing induction voltage simulation method as claimed in any one of claims 1 to 7, characterized in that: It comprises a simulation model establishment module (100), a network division module (200), an electromagnetic field calculation module (300), an equivalent circuit construction module (400), and an early warning model setting module (500); The simulation model establishment module (100) is used to establish a simulation model of the induced voltage of the GIS disconnector housing; The network division module (200) performs network division on the simulation model, sets boundary and excitation conditions, and performs numerical solution; The electromagnetic field calculation module (300) calculates the distribution of magnetic field intensity and electric field intensity; The equivalent circuit construction module (400) constructs an equivalent circuit according to the electromagnetic field result and calculates the shell induced voltage; The early warning model setting module (500) sets an early warning model, including monitoring and prediction of induced voltage and probability distribution sampling based on the Monte Carlo method.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of a method for simulating the induced voltage of a GIS disconnect switch housing according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a method for simulating the induced voltage of a GIS disconnect switch housing as described in any one of claims 1 to 7 are implemented.

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