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Coupled negative voltage circuit-based hybrid switch

A negative voltage circuit and hybrid technology, applied in the field of switching switch devices and hybrid switching circuits, can solve the problems of slow switching, unfavorable opening/closing control, and low circuit reliability, and achieve low loss, reliable performance, Easy-to-control effects

Active Publication Date: 2018-03-06
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are low reliability of the circuit, and it is not conducive to the opening / closing control, and the switching is slow

Method used

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  • Coupled negative voltage circuit-based hybrid switch
  • Coupled negative voltage circuit-based hybrid switch
  • Coupled negative voltage circuit-based hybrid switch

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Embodiment Construction

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] The switching switch of the present invention adopts a hybrid switching circuit based on a coupling negative voltage circuit. The embodiment of the present invention takes the switch circuit as an example for illustration, but those skilled in the art should realize that, without departing from the basic inventive conce...

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Abstract

The invention provides a coupled negative voltage circuit-based hybrid switch circuit, a selector switch, a switching protection system and a control method thereof. The hybrid switch circuit comprises a mechanical switch branch, a current conversion branch, one or more auxiliary solid-state switch branches and an energy absorption branch; the current conversion branch comprises one or more main solid-state switch branches and a coupled negative voltage circuit; the solid-state switch in the auxiliary solid-state switch branch comprises an anti-parallel power electronic switch; the main solid-state switch branch topology is a full-bridge circuit, and comprises a power electronic switch / diode anti-parallel circuit and a capacitor; and the power electronic switch / diode anti-parallel circuitis connected with the capacitor in parallel. The coupled negative voltage circuit-based hybrid switch circuit, the selector switch and the switching protection system disclosed in the invention have the characteristics of high reliability and convenience in control.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a hybrid switching circuit based on a coupled negative voltage circuit, a switching device and a control method. Background technique [0002] Currently there is an automatic charging type forced zero-crossing high-voltage DC circuit breaker (see patent CN105186443A), which uses a fast switching unit, an energy absorbing unit, a coupling reactor unit, a commutation capacitor unit and a main circuit isolating switch unit. Such as figure 1 The specific circuit diagram of the automatic charging type forced zero-crossing high-voltage DC circuit breaker shown, the first isolating switch K1 is connected in series with the fast switch CB, the primary winding L1, and the second isolating switch K2 in sequence, and the energy absorbing unit MOV is connected in parallel with the fast switch CB. The charging switch K3 is connected in series with the commutation capacitor C and th...

Claims

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Application Information

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IPC IPC(8): H02J9/06H02H7/12
CPCH01H9/547H02H9/06H02J9/068
Inventor 余占清曾嵘屈鲁黄瑜珑魏天予陈政宇张翔宇杨超姚大伟
Owner TSINGHUA UNIV