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Passive ground wire ice-melting controller

A lightning protection cable and passive technology, which is applied in the field of passive temperature control switches, can solve the problems of insulators and lightning protection cables that cannot be covered with ice, and achieve the effects of lightning protection operation and ice melting

Inactive Publication Date: 2012-12-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of melting ice cannot deal with icing on insulators and lightning conductors

Method used

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  • Passive ground wire ice-melting controller
  • Passive ground wire ice-melting controller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] refer to figure 1 , the passive lightning protection line ice-melting controller includes an insulating shell 1, and the coaxial line in the insulating shell 1 is sequentially equipped with a bellows sealed air chamber 2, a piston 3, a pair of moving contacts 5, a spring 4 and a pair of static Contact 6, one end of the piston 3 is connected to the end face of the bellows sealed air cavity, the other end of the piston 3 is connected to the moving contact 5, and a pair of static contacts 6 fixed on the insulating shell are respectively connected to the upper terminal outside the insulating shell 7 is connected to the lower terminal 8, one end of the spring 4 is connected to the moving contact 5, and the other end of the spring 4 is against the end face of the insulating housing. Under the action of the spring, it can ensure that the moving contact reaches balance in different positions with the temperature.

[0012] It works as follows:

[0013] A passive lightning prot...

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Abstract

The invention discloses a passive ground wire ice-melting controller comprising an insulated shell. A bellow sealing air cavity or a temperature-sensitive telescopic bimetal lamination, a piston, a pair of movable contacts, a spring and a pair of static contacts are coaxially and sequentially arranged in the insulated shell. By adopting the bellow sealing air cavity or the temperature-sensitive telescopic bimetal lamination, the ground wire ice-melting controller generates an expansion acting force at a high temperature to switch on the movable contacts and the static contacts of a control switch and shrinks at a low temperature to switch off the movable contacts and the static contacts. Accordingly, the ground wire floats on the ground at a lower temperature in winter so that the ice-melting of the ground wire is conveniently realized, recovers a grounding state in a high-temperature season and is convenient for the lightningproof operation of the transmission line. The ground wire ice-melting controller has the control capability with temperature variance by utilizing the material characteristics, does not need a control power supply, has a simple structure and is easy to realize and use.

Description

technical field [0001] The invention relates to a passive temperature control switch which controls the on-off of the grounding circuit of the lightning protection line by the ambient temperature, and is suitable for the ice-melting control of the overhead lightning-protection line of the power system. When the ice is melted in winter, the grounding circuit is disconnected for the ice-melting operation, and the conductor is restored in summer. The on state is used for lightning protection. Background technique [0002] Major ice and snow disasters will cause 220kV, 500kV and other multi-circuit overhead transmission lines to be covered with ice on a large scale, and the gravity load of the line will be too large, resulting in the collapse of multiple towers, causing the power supply to be interrupted and cannot be restored for a long time. Ice and snow disasters will have a very bad impact on the transmission safety of the power system and cause major economic losses. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G13/00H01H37/52
Inventor 杨贵玉藏玉清江道灼
Owner ZHEJIANG UNIV
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