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Umbrella-shaped structure for combined insulator of high altitude ice-covering area

A composite insulator, high-altitude technology, applied in the direction of insulators, suspension/strain insulators, electrical components, etc.

Inactive Publication Date: 2008-01-02
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Neither of the two patents disclosed above optimized the umbrella structure from the perspective of ensuring electrical performance in high-altitude ice-covered areas

Method used

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  • Umbrella-shaped structure for combined insulator of high altitude ice-covering area
  • Umbrella-shaped structure for combined insulator of high altitude ice-covering area
  • Umbrella-shaped structure for combined insulator of high altitude ice-covering area

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Embodiment Construction

[0013] The technical scheme of the present invention will be further described below in conjunction with the accompanying drawings:

[0014] The umbrella structure of the composite insulator used in the high-altitude ice-coated area provided by the present invention uses the finite element method to simulate the surface electric field of the composite insulator under high-altitude and ice-coated conditions. The research results show that the structure of the composite insulator has a significant effect on the electric field distribution. Obviously, the larger the diameter of the umbrella skirt of the composite insulator, the smaller the electric field strength at the tip of the ice edge on the surface of the ice-coated composite insulator. When the diameter of the umbrella skirt is greater than 210mm, the electric field intensity at the tip of the ice edge on the surface of the ice-coated composite insulator tends to be saturated; The small surface inclination of the insulator she...

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Abstract

An umbrella type structure of composite insulator used in high-altitude ice-coated area is composed of at least two umbrella skirts as large, middle and small diameters. The invention is characterized in that the distance between umbrella skirts is 35-40mm, the distance between large umbrella skirts is 170-220mm, the diameter of large umbrella skirt is 170-220mm, the diameter ratio between large and small umbrella skirts is 1.8-2.1, the diameter ratio between large and small umbrella skirts is 1.3-1.5, the pitch angles of upper surfaces of large, middle and small umbrella skirts are 8-9 degrees, the pitch angles of lower surfaces of large, middle and small umbrella skirts are 0 degrees. The invention can be used for the external insulation engagement of power transmission system more than 110KV at high-altitude ice-coated area. The invention has reasonable structure, high ice flash voltage, low local field strength, and wide application, which can resist ice slush bridge umbrella skirt.

Description

Technical field [0001] The invention belongs to the technical field of high voltage and insulation, and particularly relates to an umbrella structure of composite insulators in high-altitude ice-coated areas. Background technique [0002] Composite insulators have the characteristics of light weight, high strength, good pollution resistance, convenient operation and maintenance, etc., and have been widely used in power systems. The electrical performance of the external insulation of composite insulators mainly depends on the hydrophobicity of the material and the umbrella structure of the external insulation. The composite insulators in operation will inevitably face the influence of high altitude, icing and other complex environmental conditions. Hydrophobicity may be temporarily weakened or even completely lost. At this time, the umbrella structure of the composite insulator will determine the electrical performance of its external insulation. The test results show that the ex...

Claims

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Application Information

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IPC IPC(8): H01B17/04H01B17/38H01B17/00
Inventor 蒋兴良张志劲胡建林孙才新舒立春胡琴温作铭王波
Owner CHONGQING UNIV
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