220kv Anti-icing and Anti-thunder composite insulator

Abstract

The invention discloses a 220kV anti-icing and lightning-proof composite insulator, the nameplate of which is pasted on the ball socket, the 20R type locking pin is installed inside the ball socket for locking the ball socket and one end of the mandrel, and the ball head is installed on the core On the other end of the rod, the zinc oxide resistor is set on the upper part of the mandrel, the wave spring washer is pressed and installed on the upper end of the zinc oxide resistor, the upper end of the electrode is installed on the wave spring washer, the lower end is installed on the lower end of the zinc oxide resistor, and the connecting sleeve is set on the core. In the middle of the rod, the winding tube, zinc oxide resistor, upper umbrella, lower umbrella, umbrella skirt 1, mandrel, pressure equalizing ring, and umbrella skirt 2 are all arranged outside the mandrel in an orderly manner, and the mechanical strength of the whole product is Beared by the middle mandrel, it is used in heavily ice-covered areas and common minefields. It has the advantages of reasonable structure, good electrode contact, and high mechanical strength of the product, and is easy to popularize and apply.

Description

technical field [0001] The invention belongs to the technical field of high voltage and insulation, in particular to a 220kV anti-icing and lightning-proof composite insulator. Background technique [0002] The gap between the sheds of the existing composite insulators with umbrella structures is generally small, and they are easily bridged by ice edges, and their electrical performance drops significantly, even lower than that of porcelain and glass insulator strings at the same structural height. In the current research on the umbrella structure, there is no separate optimization design for heavily iced lightning strike areas, and there is no optimization scheme that combines ice flash and lightning lightning related theories. For example, none of the published patents consider the degree of ice coverage. Influenced and did not optimize the design of the umbrella structure from the perspective of the ice-covered flashover electric field and the discharge process; through a...

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Problems solved by technology

[0002] The gap between the sheds of existing umbrella-shaped composite insulators is generally small, and it is easy to be bridged by ice edges, and its electrical performance drops significantly, even lower than that of porcelain and glass insulator strings at the same structural height.

In the current research on the umbrella structure, there is no separate optimization design for heavily iced lightning strike areas, and there is no optimization scheme that combines ice lightning and lightning lightning related theories. For example, none of the published patents consider the degree of ice coverage. Influenced and did not optimize the design of the umbrella structure from the perspective of the ice-covered flashover electric field and the discharge process; through a large-scale multifunctional artificial climate chamber, the charged icing and flashover characteristics tests of different umbrella-shaped composite insulators were carried out, and the research results It shows that under the condition of heavy ice (d>20mm), the ice edge of the shed will grow until it bridges the spacing of the sheds, even if the super large shed with a large spacing is no exception, and the diameter, number and interposition position of the sheds will all change. Significantly affects its Ice Flash properties

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