A UHV Composite Insulator with Uniform Electric Field Distribution

Abstract

The invention relates to an extra-high voltage composite insulator with uniform electric-field distribution and belongs to the technical field of electric materials. In the extra-high voltage composite insulator, a silicon rubber insulator is connected with a nonlinear characteristic insulator; a grounding electrode end and an equalizing ring are arranged at the end of the silicon rubber insulator; a high-voltage electrode end for fixing a conductor and the equalizing ring are arranged at the end of the nonlinear characteristic insulator; the silicon rubber insulator accounts for 4/5 of totallength of the extra-high voltage composite insulator; and the nonlinear characteristic insulator accounts for 1/5 of total length of the extra-high voltage composite insulator. By the extra-high voltage composite insulator, an insulator monomer is prepared from a nonlinear composite material and is assembled by mixing the traditional silicon rubber insulator monomer, non-uniformity of whole electric-field distribution of the extra-high voltage insulator can be obviously improved, the safety and reliability in the operating process are improved, the service life of the insulator is prolonged, dimension of the equalizing ring is reduced and even canceled, and the difficulty and cost of design, production and installation of the extra-high voltage insulator are greatly reduced.

Description

technical field [0001] The invention relates to an ultra-high voltage composite insulator with uniform electric field distribution, belonging to the technical field of electrical materials. Background technique [0002] In high-voltage power transmission and transformation systems, insulation is one of the most critical core issues; the higher the system voltage level, the more important and difficult the insulation problem becomes. Silicone rubber composite insulators are the most widely used insulating equipment in power systems, and the voltage distribution they withstand during use is often extremely uneven. At the high-voltage end of the insulator, the electric field strength it bears far exceeds the average value of the overall electric field strength, and even reaches several times the average value, which brings a series of adverse effects, especially the problem of material aging. Silicone rubber is an organic polymer dielectric material. The greater the electric f...

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Problems solved by technology

This measure has a certain effect on alleviating the inhomogeneous electric field of the insulator, but it will significantly increase the complexity and difficulty of equipment manufacturing, and the voltage equalization effect cannot reach an ideal level.

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