Composite insulator with nonlinear anti-pollution-flashover structure

A composite insulator, nonlinear technology, applied in the field of power equipment, can solve the problems of increasing creepage distance, labor and material consumption, and cost increase

Inactive Publication Date: 2019-06-14
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Conventional anti-pollution flashover measures for composite insulator pollution flashover increase creepage distance, strengthen cleaning and use paint, etc., which consume manpower and materials and increase the cost

Method used

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  • Composite insulator with nonlinear anti-pollution-flashover structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The composite insulator of this embodiment is applied in a power system with an AC voltage level of 220 kV. The particle size of the zinc oxide ceramic powder in the nonlinear conductive composite material is 100-120 μm, accounting for the volume fraction of the voltage equalizing layer of the nonlinear conductive material The ratio is 45%.

Embodiment 2

[0023] The composite insulator of this embodiment is applied in a power system with an AC voltage level of 500 kV. The particle size of the zinc oxide ceramic powder in the nonlinear conductive composite material is 50-70 μm, accounting for the volume fraction of the voltage equalizing layer of the nonlinear conductive material The ratio is 40%.

Embodiment 3

[0025] The composite insulator of this embodiment is applied in a power system with an AC voltage level of 1000 kV. The particle size of the zinc oxide ceramic powder in the nonlinear conductive composite material is 10-30 μm, accounting for the volume fraction of the voltage equalizing layer of the nonlinear conductive material The ratio is 30%.

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Abstract

The invention discloses a composite insulator with a nonlinear anti-pollution-flashover structure. The composite insulator is applicable to an alternating-current power system and comprises a mandrel,wherein an end fitting ball socket is installed at one end of the mandrel, an end fitting ball head is installed at the other end of the mandrel, the outer side of the mandrel is sleeved with a nonlinear anti-pollution-flashover layer, the outer side of the nonlinear anti-pollution-flashover layer is sleeved with a silicone rubber umbrella cluster with a sheath, the nonlinear conductive anti-pollution-flashover layer is a nonlinear conductive material, and the nonlinear conductive material comprises zinc oxide ceramic powder particles and silicone rubber. The composite insulator has the advantages that by the adoption of the insulator with the nonlinear anti-pollution-flashover structure, the nonlinear conductive composite material is introduced into the composite insulator and is used for making field intensity distribution of the composite insulator along the mandrel direction uniform. Through the composite insulator, field intensity in a dry region can be lowered, and pollution flashover is suppressed; and meanwhile, manpower, paint and the like are substituted, so that cost is lowered.

Description

technical field [0001] The invention relates to the technical field of electric equipment, in particular to a composite insulator with a non-linear anti-pollution flashover structure. Background technique [0002] As an important part of high-voltage transmission equipment, composite insulators are more and more widely used in transmission lines, especially UHV transmission lines (referring to ±800 k volts and above direct current and 1000 kilovolts and above alternating current voltage level to transmit electric energy), at present, composite insulators are basically used. [0003] The structure of an existing composite insulator is as follows figure 1 As shown, it includes end fittings ball socket 1, mandrel 2, silicone rubber umbrella group and sheath 4, and end fittings ball head 5; wherein, mandrel 2 is made of glass fiber drawing rod for supporting For insulation, the upper and lower ends of the mandrel are respectively installed with the end fitting ball socket 1 an...

Claims

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Application Information

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IPC IPC(8): H01B17/42H01B17/38
Inventor 胡军何金良赵孝磊杨霄李琦张波薛渊牧徐志磊李欣欣韩世建陈殿龙孙浩
Owner TSINGHUA UNIV
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