A multiphysics-based optimization method for gis/gil internal insulation
An internal insulation, multi-physics technology, applied in design optimization/simulation, electrical digital data processing, special data processing applications, etc. Rod, the effect of overcoming surface charge build-up
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Embodiment 1
[0064] see figure 1 , the embodiment of the present invention provides a multi-physics-based GIS / GIL internal insulation optimization method, including the following steps:
[0065] Step 1: Parameter measurement; measure the relationship curve of the electrical conductivity of the insulating material and insulating gas used as a function of temperature, and construct the corresponding functional relationship; measure the Poisson's ratio and Young's modulus of the insulating material and insulating gas used at different temperatures and density, construct the relationship curve of Poisson's ratio, Young's modulus and density with temperature, and form the corresponding functional relationship;
[0066] Step 2: Generate a model; obtain multiple geometric shapes or internal insulation models doped with different materials by genetic algorithm or actual production experience;
[0067] Step 3: thermal calculation; perform thermal calculations for the internal insulation parts made...
Embodiment 2
[0078] On the basis of the first embodiment, this embodiment specifically describes a calculation method and process of a multiphysics-based GIS / GIL internal insulation optimization method.
[0079] Specifically, in terms of electricity, the setting of the sampling electrostatic field, the domain equation is as follows:
[0080]
[0081]
[0082] in is the electric displacement vector, ρ v is the bulk charge density, is the electric field strength, and V is the potential value. The boundary condition is a Dirichlet boundary:
[0083] Low voltage side (ground): V=0
[0084] High voltage side: V=U set
[0085] In order to take into account the surface charge accumulation phenomenon of the insulating part in GIL / GIS into the calculation process, the boundary condition of charge accumulation is added on the surface of the insulating part:
[0086]
[0087]
[0088] where ρ s is the surface charge density, γ bulk , γ surface with gamma gas Respectively, the...
Embodiment 3
[0111] On the basis of Embodiments 1 and 2, this embodiment focuses on the basin insulator as an example to illustrate the optimization process of the optimization method provided by the present invention.
[0112] Take the pot insulator as an example, such as figure 2 As shown, area 1 is the high-voltage side electrode, area 2 is the main body of the insulator, area 3 is the low-voltage side electrode, and the rest is sulfur hexafluoride gas. The main body of the insulator is made of epoxy material doped with alumina, and its composition ratio is 100 parts of epoxy resin, 330 parts of aluminum oxide, 38 parts of curing agent.
[0113] The first step is to measure the relationship between the conductivity of the insulating material and the insulating gas as a function of temperature, as shown in image 3 Shown; Among them, the abscissa is the temperature, and the ordinate is the conductivity.
[0114] Measure the curves of Poisson's ratio, Young's modulus and density of ins...
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