Method for switching without any interruption between winding taps on a tap-changing transformer

A transformer and adjustable technology, applied in variable transformers, transformers, variable inductors, etc., can solve problems such as unsuitable tap changers, and achieve the effects of economic parameter design, small loss, and rated switching power improvement.

Active Publication Date: 2011-05-25
MASCHFAB REINHAUSEN GEBR SCHEUBECK GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This known method is therefore not suitable for application to individual, universally applicable tap-changers which are not designed for a specific tap-changer

Method used

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  • Method for switching without any interruption between winding taps on a tap-changing transformer
  • Method for switching without any interruption between winding taps on a tap-changing transformer
  • Method for switching without any interruption between winding taps on a tap-changing transformer

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Embodiment Construction

[0044] figure 1 A schematic flow diagram of the first method according to the invention is shown. The method involves, for a tap-changer in which a changeover is to be made from the previous winding tap of the tapped transformer to the new winding tap, providing two load branches which can be switched via the mechanical switch DS a and DS b and those arranged in series with it are respectively connected in parallel with a diode d an , d ap ;d bn , d bp are respectively composed of two oppositely connected IGBTs (I an , I ap ; I bn , I bp ) is electrically connected to a common load lead, and a piezoresistor V is provided in parallel with each of the IGBTs an , V ap ;V bn , V bp. Each of these two load branches shall be able to pass through the long-term service main contact MC a or MC b join.

[0045] As a first step, the mechanical switches DS on both sides as release contacts (Freischaltkontakt) a and DS b closure.

[0046] Then, the startup voltage is app...

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Abstract

The invention relates to a method for switching without any interruption between two winding taps (tap n, tap n+1) of a tap-changing transformer, wherein each of the two winding taps is connected to the common load output line via in each case one mechanical switch (Ds) and a series circuit, arranged in series thereto, comprising two IGBTs (Ip, In) which are switched in opposite directions.

Description

technical field [0001] The invention relates to a method for switching between winding taps of a tapped transformer with semiconductor switching elements without interruption. Background technique [0002] Such a method using semiconductor switching elements is disclosed in WO 01 / 22447. The method described there works both with the electrical switching device IGBT and with the mechanical contacts. It is designed so that the actual load switching takes place with two IGBTs with diodes in the Glitz circuit at zero crossing of the load current. An essential element of this known method is the recognition and detection of the corresponding current zero crossing as a prerequisite for the load switching at this point in time. [0003] WO 97 / 05536 discloses another method of using IGBT switching devices in which the taps of the adjusting coil of a power transformer are connected to a common load lead via a series circuit of two IGBTs. This known method works according to the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F29/04
CPCH01F29/04
Inventor O·布吕克尔D·多纳尔H-H·莱克曼-米斯克
Owner MASCHFAB REINHAUSEN GEBR SCHEUBECK GMBH & CO KG
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