Multi-level optimization design method of GIS/GIL basin-type insulator with high electrical resistance

Abstract

The invention discloses a multi-level optimization design method of a GIS / GIL basin-type insulator with high electrical resistance. The method comprises a preliminary design stage and a detailed design stage. In the preliminary design stage, the basic shape of the GIS / GIL basin-type insulator is constructed by adopting contour shape optimization, the shapes of a convex surface and a concave surface of a basin body are described by utilizing a two-dimensional contour function, dielectric functionally graded material distribution is considered to be introduced, dielectric property space distribution is adjusted by utilizing topological optimization to actively regulate and control electric field distribution, and a creeping electric field is further deeply homogenized; in the detailed designstage, according to a dielectric distribution topological optimization result, the optimized gradient insulation area is converted into a high dielectric area with a constant dielectric constant, thesizes of the high-voltage side metal accessory and the high dielectric area are finely adjusted, an optimal size parameter is found out by adopting a genetic algorithm or an ant colony algorithm so as to finish the design of the basin-type insulator for GIS / GIL. The design space can be fully expanded, depth suppression of a creeping electric field is achieved, and the purpose of increasing the breakdown voltage of the basin-type insulator is achieved.

Description

technical field [0001] The invention belongs to the technical field of design and manufacture of high-voltage power equipment, and in particular relates to a multi-level optimization design method of a GIS / GIL basin-type insulator with high electric resistance performance. Background technique [0002] Gas Insulated Switchgear (GIS) is widely used in EHV and UHV substations because of its small footprint and stable operating environment. Gas Insulated Transmission Line (GIL), as a new type of advanced transmission method, has the advantages of large transmission capacity, small transmission loss, and high safety. It is often used as an alternative to overhead lines and is used in special transmission environments. . [0003] As an important part of the GIS / GIL equipment, the pot insulator plays the role of supporting the metal guide rod, isolating the potential, and sealing the gas chamber. On the one hand, due to the uneven distribution of the electric field along the sur...

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Problems solved by technology

[0004] Visualization of physical processes and accurate quantification of physical quantities can be realized by means of numerical simulation, and insulation coordination and electrical design can be optimized. On the one hand, traditional structural parameter optimization design methods can only adjust the geometric shape within a limited size range, and the electric field optimization effect is limited. In addition, Due to the large number of design variables and the need to call the finite element model many times, the amount of calculation is large and the optimization efficiency is low

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