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Control method for the field intensity at the compound insulator end and compound insulator

A composite insulator and control method technology, applied in organic insulators, insulators, rubber insulators and other directions, can solve the problems of shortening the impact withstand voltage level of composite insulators, hidden dangers of engineering construction and safe operation, and increasing the size of towers, and solve the project cost. The effect of increasing, improving the withstand voltage margin, and reducing the strength

Inactive Publication Date: 2009-05-13
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

The use of voltage equalizing shielding rings will shorten the impact withstand voltage level of composite insulators. With the increase of voltage levels, the size of voltage equalizing rings of composite insulators for EHV and UHV lines has become larger and larger, which will not only increase the size of towers , but also bring hidden dangers to engineering construction and safe operation

Method used

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  • Control method for the field intensity at the compound insulator end and compound insulator
  • Control method for the field intensity at the compound insulator end and compound insulator

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] The composite insulator involved in the present invention comprises a mandrel, metal fittings at both ends of the mandrel, an umbrella shed and a sheath covered outside the mandrel. The relative dielectric constant of room temperature vulcanized silicone rubber used in conventional composite insulator shed and sheath materials is about 3. Doping aluminum powder and barium titanate powder in conventional vulcanized silicone rubber can increase the dielectric constant of the material, correspond to different doping volumes, and control the shape and distribution of particles, and a new type of silicone rubber with a relative dielectric constant of 40 can be obtained. Material.

[0015] In order to reduce the field strength at the end of the composite insulator, the method of the present invention takes the following steps: use high dielectric constant silicon rub...

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Abstract

This invention relates to compound insulator field control method, wherein, the insulator comprises chip bar, metal wares on both sides and umbrella protection cover; the method is characterized by the following: adopting silicon rubber materials with high dielectric parameters with less than 5 percent of umbrella protection with other protection part adopting regular rubber for casting into shape. This invention uses the materials to process compound insulator cover to improve voltage bearing ability and to ease maximum field of insulator end.

Description

technical field [0001] The invention belongs to the technical field of manufacturing high-voltage insulators, in particular to a method and method for controlling the field strength at the end of a composite insulator. [0002] Composite insulators used in various voltage levels, especially long-string composite insulators for EHV and UHV. Background technique [0003] Composite insulators have broken the dominance of ceramic and glass insulators due to their light weight, high strength, not easy to break, high pollution flashover voltage, easy manufacturing, transportation, installation and maintenance, etc. In recent decades, transmission lines of various voltage levels Because the insulators only have metal ends at the upper and lower ends, and the size is not large, the main capacitance formed by them and the intermediate insulator (ie core rod) is much smaller than the main capacitance of the porcelain or glass insulator string, so the electric field distribution of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B19/00H01B3/28B29C45/00H01B17/42H01B17/04
CPCH01B17/325H01B17/42
Inventor 贾志东刘振王黎明关志成
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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