Basin-type insulator combined structure suitable for gas-insulated metal-enclosed power transmission line

Abstract

The invention discloses a basin-type insulator combined structure suitable for a gas-insulated metal-enclosed power transmission line. The basin-type insulator combined structure comprises a basin-type insulator, a high-voltage shielding case and a central insert, wherein the concave surface contour line of the basin-type insulator is sequentially divided into a first concave surface straight line section, a first concave surface arc section, a second concave surface straight line section and a second concave surface arc section from the center side to the circumferential side and forms a smooth transition type contour line, the convex surface contour line of the basin-type insulator is sequentially divided into a first convex surface arc section and a second convex surface arc section from the center side to the circumferential side and forms a smooth transition type contour line, the contour line of the outer surface of the high-voltage shielding case is sequentially divided into a first outer surface arc section, an outer surface linear section and a second outer surface arc section from the root portion side to the end portion side and forms a smooth transition type contour line, the contour line of the joint surface of the central insert and the central insert mounting hole of the basin-type insulator adopts a single joint arc section, the basin-type insulator is made of an epoxy resin, and the center insert and the basin-type insulator are manufactured in an integrated vacuum casting mode.

Description

technical field [0001] The invention belongs to the technical field of high-voltage power transmission, and in particular relates to a basin-type insulator composite structure suitable for gas-insulated metal-enclosed power transmission lines. Background technique [0002] Gas-insulated metal-enclosed transmission line (GIL) is a kind of SF 6 Or other gas-insulated, high-voltage, high-current, long-distance power transmission equipment with coaxial arrangement of conductors and shells. It has the advantages of large transmission capacity, flexible layout, and little impact from harsh environments. It is suitable for power with limited corridor selection. Transportation occasions. [0003] A gas-insulated metal-enclosed transmission line (GIL) includes a central conductive rod, an outer casing, a particle trap, and an insulating part that supports and connects, and the insulating part is an insulator assembly. The insulator assembly plays a very important role in the gas-in...

AI Technical Summary

Problems solved by technology

[0004] However, there are still some deficiencies in the application effect of the traditional insulator assembly, especially in the gas area near the insulator assembly, it is easy to have too high field strength in the local area and the tangential field strength of the insulator along the surface is too large. In some cases, the insulators will experience aging or even insulation breakdown, which will eventually lead to a significant reduction in the overall insulation performance of the entire gas-insulated metal-enclosed transmission line (GIL)

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