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Control method of tap changer

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

Active Publication Date: 2022-07-22
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 tap changer
  • Control method of tap changer
  • Control method of tap changer

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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, rather than all 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 method for controlling 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 tracks in sequence according to a 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-ph...

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Abstract

The invention provides a control method of a tap changer. The cams on the outer track and the inner track of the cam plate of the tap changer are arranged to be unevenly distributed, and at the same time, the phase selection control is coordinated to offset the difference between the three-phase currents. Phase difference, so that the time from the start of opening to the first zero-crossing point of the current of each phase of the switching system of the vacuum bubble switch of each phase is as equal and as short as possible, so as to solve the problem of the vacuum of the three-phase tap changer in the prior art. The problem of random breaking time of bubbles and long arcing time between contacts after breaking.

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 timing, 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 bubble contact swi...

Claims

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Application Information

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Patent Type & Authority Patents(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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