Control method of tapping switch

A technology of tap changer and control method, applied in electrical switches, electrical components, circuits, etc., can solve the problems of random breaking time of vacuum bubbles and long arcing time of contacts

Active Publication Date: 2021-03-26
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a control method of a tap changer to solve the problems in the prior art that the break time of the vacuum bubble of the tap changer is random and the arcing time between the contacts after breaking is long

Method used

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  • Control method of tapping switch
  • Control method of tapping switch
  • Control method of tapping switch

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Embodiment Construction

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] An embodiment of the present invention provides a control method for a tap changer, wherein the tap changer includes a cam disc, and an inner track and an outer track are arranged on the cam disc, and the outer track has A-phase outer rails in sequence according to the circumferential distribution. The cam, the B-phase outer cam and the C-phase outer cam, the center angle difference between the A-phase outer cam and the B-phase ...

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Abstract

The invention provides a control method of a tapping switch. The method is characterized in that cams on an outer track and an inner track of a cam disc of the tapping switch are arranged in a non-uniform distribution manner and are matched with phase selection control to counteract a phase difference among three-phase currents. Therefore, the time of each phase of vacuum bubble switching contactswitching system from the start of switching off to the first zero crossing point of each phase of current is equal and short as much as possible, and problems that in the prior art, the switching-offtime of the vacuum bubble of the three-phase tapping switch is random, and the arcing time between contacts is long after switching off are solved.

Description

technical field [0001] The invention relates to a tap switch, in particular to a control method of the tap switch. Background technique [0002] The vacuum on-load tap-changer for power transformers, when the gear is changed and switched, the load current is transferred through different branches through the set mechanical action and the timing sequence, and finally the transfer to the next gear is realized. , When some branches are opened, there is a certain voltage difference between the fractures, resulting in arcs during the opening process. The vacuum on-load tap-changer adopts vacuum bubbles, and the fractures that may generate arcs are replaced by vacuum bubbles, so that the arc is only in the vacuum The arc is extinguished in the bubble to avoid the arc deterioration and decomposition of the oil of the on-load tap-changer. [0003] see figure 1 , figure 1 It is the structure diagram of the vacuum bubble contact switching system of the tap changer. The vacuum bubbl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/00
CPCH01H9/0038H01H9/0027
Inventor 杨家辉鲍连伟袁耀张曦程建伟朱俊霖邹德旭
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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