Photothermal and electrothermal hybrid DC anti-icing composite insulator

A composite insulator and hybrid technology, applied in insulators, suspension/strain insulators, circuits, etc., can solve the problems of easy occurrence of ice flashes, decline in electrical performance of composite insulators, and endanger the safe operation of transmission lines. Ice flashover accident, the effect of excellent anti-pollution flashover capability

Active Publication Date: 2020-02-18
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-distance energy transmission will inevitably pass through some high-altitude, snow-covered, and ice-covered areas. The terrain and climate conditions in these areas are complex, and the probability of encountering line icing is also very high, which will lead to poor electrical performance of composite insulators. falling, prone to ice flash, which seriously endangers the safe operation of transmission lines

Method used

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  • Photothermal and electrothermal hybrid DC anti-icing composite insulator
  • Photothermal and electrothermal hybrid DC anti-icing composite insulator
  • Photothermal and electrothermal hybrid DC anti-icing composite insulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] figure 1 In the photothermal layer 5 used by 30 parts of FeMnCuO 4 Micropowder (particle size 0.6 ~ 1.8μm) and 70 parts of ordinary RTV paint are mixed in a kneader at 120°C for 2 hours, then ground and dispersed to obtain an inorganic metal oxide RTV paint coating. The semiconductor graphite RTV coating used is prepared by mixing 22 parts of conductive graphite powder (particle size 0.6-1.8 μm) and 78 parts of ordinary RTV coating in a kneader at 120°C for 2 hours, then grinding and dispersing. structured as figure 1 As shown, the insulator is composed of large umbrellas with a diameter of 130mm and small umbrellas with a diameter of 100mm alternately, and the spacing between the umbrellas is 40mm. 4 ) RTV coating, the lower surface of the shed and the sheath 4 are coated with semiconducting graphite RTV coating to form a semiconducting layer 7, and the volume resistivity of the semiconducting RTV coating is 1.36×10 5 Ω·m, the middle layer of the umbrella skirt is a...

Embodiment 2

[0030] figure 2 Among them, the inorganic metal oxide RTV coating used consists of 25 parts of FeMnCuO 4 Fine powder (particle size 0.6-1.8 μm) and 75 parts of ordinary RTV paint are mixed in a kneader at 120 ° C for 2 hours and then ground and dispersed. The semiconductor graphite RTV coating used is made of 21 parts of conductive graphite powder (particle size 0.6-1.8 μm ) and 79 parts of ordinary RTV coatings were mixed in a kneader at 120°C for 2 hours and then ground and dispersed; the structure is as follows figure 2 As shown, the insulator is composed of large umbrellas with a diameter of 130mm and small umbrellas with a diameter of 100mm alternately. The spacing between the umbrellas is 38mm. The silicone rubber layer 6 on the upper surface and the sheath 4 are ordinary silicone rubber, and the lower surface of the shed and the sheath are coated with semiconductor graphite RTV coating. As the semiconductor layer 7, the volume resistivity of the semiconductor RTV pai...

Embodiment 3

[0032] image 3 Among them, the semiconductor graphite RTV coating used is made of 21 parts of conductive graphite powder (particle size 0.6 ~ 1.8 μm) and 79 parts of ordinary RTV coating in a kneader after kneading at 120 ° C for 2 hours and then ground and dispersed. The semiconductor graphite silicone rubber used is made of 13 parts of conductive graphite powder (particle size 0.6 ~ 1.8 μm) and 87 parts of ordinary silicone rubber compound were mixed in a kneader at 150 ° C for 2 hours, and the middle part of the sheath 4.1 was made of 12 parts of graphite powder (particle size 0.6~1.8μm) and 88 parts of silicone rubber compound mixed in a kneader at 150°C for 2 hours; the structure is as follows image 3 As shown, the insulator is composed of large umbrellas with a diameter of 130mm and small umbrellas with a diameter of 100mm alternately, and the spacing between the umbrellas is 52mm. The silicone rubber layer 6 on the upper surface and the sheath 4 at both ends are ordin...

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Abstract

The invention relates to a photothermal and electrothermal hybrid DC anti-icing composite insulator which comprises a hardware end, a voltage equalizing device, a core rod, a sheath and an umbrella skirt. The umbrella skirt comprises combination of two or more of a silicone rubber layer, a photothermal layer and a semiconductor layer. The umbrella skirt is composed of the silicone rubber layer, the photothermal layer and the semiconductor layer. The photothermal layer is arranged on the upper surface, the silicone rubber layer is arranged in the middle and the semiconductor layer is arranged on the lower surface; or the umbrella skirt is composed of the photothermal layer and the silicone rubber layer, and the photothermal layer is arranged on the upper surface and the silicone rubber layer is arranged on the lower layer. The photothermal layer is prepared by mixing inorganic metal oxide with silicone rubber or RTV coating. The semiconductor layer is prepared by mixing conductive graphite micropowder with silicone rubber or RTV coating. The unique hydrophobic mobility of the silicone rubber layer can be migrated to the surface of the photothermal layer so that the insulator has excellent anti-pollution flashover capability, reduces the field strength at the high voltage end of the insulator and delays the aging of the insulator. In the ice and snow weather in winter, the photothermal layer and the semiconductor layer can effectively melt ice and prevent ice flash accidents through the breaking effect during icing.

Description

technical field [0001] The invention relates to the field of power equipment in the power transmission and transformation industry, in particular to an insulator for basic electrical components. Background technique [0002] With the continuous expansion of energy development, power transmission and power system, DC transmission has the characteristics of saving energy loss and is developing rapidly. Moreover, in the development and utilization of energy in remote areas and in the development of new energy and new power generation methods, DC transmission technology is an effective means. Long-distance energy transmission will inevitably pass through some high-altitude, snow-covered, and heavy-ice-covered areas. The terrain and climate conditions in these areas are complex, and the probability of encountering line ice is also very high, which will lead to poor performance of composite insulators. falling, it is prone to ice flash, which seriously endangers the safe operatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/04H01B17/38
CPCH01B17/04H01B17/38
Inventor 尹桂来吴兆峰杨红军马向方张力张宇饶斌斌
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
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