A three-pillar insulator
An insulator and three-pillar technology, applied in the field of three-pillar insulators, can solve the problems affecting the reliability of the power system, the performance degradation of insulators, accelerated insulation, etc., and achieve the effect of ensuring safe and reliable operation, improving insulation performance, and simple design structure
Active Publication Date: 2022-04-12
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology
In the process of operation, it is subjected to periodic loads of various loads. In areas with large stress concentrations, these micro-defects gradually evolve and deteriorate. When they develop to a certain extent, they will induce partial discharge, abnormal heating, etc., and accelerate insulation aging. The performance of the insulator is degraded, which seriously affects the reliability of the safe operation of the power system
Method used
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Embodiment approach
[0041] In a preferred embodiment, according to the structural design method of the above-mentioned three-pillar insulator, it is obtained that the arc radius of the concave arc surface 111 is 40.9 mm, and the arc length span is 57.6°; the torus 112 The ring width is 6mm; the arc radius of the chamfered surface 12 is 6.4mm, and the arc length span is 90°; the straight line length of the straight line section 131 is 18.1mm; the arc of the first curved section 132 The radius is 142.3 mm, and the arc length span is 46.1°; the arc radius of the second curved section 133 is 8.6 mm, and the arc length span is 53.9°.
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Abstract
The invention discloses a three-pillar insulator, comprising: an insulator belly, a column base and a metal insert; wherein, the column base is composed of a column base bottom surface, a chamfered surface and a curved surface; the column base bottom surface is composed of a ring surface Composed of a concave arc surface, the inner side of the torus is connected to the arc surface; the outer side of the torus is connected to the first end of the chamfered surface; the chamfered surface The second end is connected to the first end of the curved surface, and the second end of the curved surface is connected to the abdomen of the insulator; the metal insert is arranged on the concave arc surface. The implementation of the embodiments of the present invention can effectively improve the stress resistance of the foot of the three-pillar insulator, reduce the stress failure risk of the foot of the three-pillar insulator, and ensure the safe and reliable operation of the power system.
Description
technical field [0001] The invention relates to the field of power transmission and transformation insulation equipment, in particular to a three-pillar insulator. Background technique [0002] Three-post insulators are key electrical components in gas-insulated metal-enclosed transmission lines (GIL), which play the role of electrical insulation and mechanical support. The three-pillar insulator is made by mixing epoxy resin, curing agent (usually acid anhydride) and filler (aluminum oxide powder, etc.) into a mold with aluminum alloy inserts and curing at high temperature. [0003] In recent years, during the operation of power equipment, the stress concentration of three-pillar insulators has caused insulation failures to occur from time to time. The main reasons for the stress concentration of three-pillar insulators are: residual stress generated during the manufacturing process; insufficient transportation protection, improper installation, etc. Internal stress concen...
Claims
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IPC IPC(8): H01B17/14H01B17/40
CPCH01B17/14H01B17/40
Inventor 高超周福升黄若栋杨芸王国利黎卫国楚金伟刘婉莹
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD