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Current injection type mechanical high-voltage DC circuit breaker with input current direction selection

A technology of current direction and current injection, which is applied to circuit devices, emergency protection circuit devices, electrical components, etc., can solve the problems of bulky charging capacitors and inductive circuits, and achieve the effect of reducing arcing time

Inactive Publication Date: 2019-08-06
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current only bulky and very expensive charging capacitor and inductance circuit cannot meet this requirement.

Method used

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  • Current injection type mechanical high-voltage DC circuit breaker with input current direction selection
  • Current injection type mechanical high-voltage DC circuit breaker with input current direction selection
  • Current injection type mechanical high-voltage DC circuit breaker with input current direction selection

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Embodiment

[0024] Such as Figure 5 As shown, the present invention provides a current injection mechanical high-voltage DC circuit breaker with input current direction selection, and replaces the IGCT electronic switch of the original mechanical high-voltage DC circuit breaker without current selectivity with a full-bridge rectifier module. Moreover, the controller used determines the time to invest in the current transfer branch and determines which group of thyristors to trigger according to the direction of the current flowing through the high-voltage vacuum circuit breaker. If the current flowing through the high-voltage vacuum circuit breaker is as Figure 7 As shown, the two thyristors T1 and T3 are triggered; if the current flowing through the high-voltage vacuum circuit breaker is as follows Figure 8 As shown, the two thyristors T2 and T4 are triggered. When the DC short-circuit current flows in different directions in the high-voltage vacuum circuit breaker, the direction of ...

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Abstract

The invention relates to a current injection type mechanical high-voltage DC circuit breaker with input current direction selection. The circuit breaker comprises a high-voltage vacuum circuit breakerbranch, a current transfer branch and a lightning arrester branch which are mutually connected in parallel, wherein the current transfer branch includes a capacitor, an inductor, a full-bridge rectification module and a high-voltage circuit breaker branch current detection and control module, two input ends of the full-bridge rectification module are connected through the capacitor and the inductor, and two output ends are connected at two ends of the high-voltage vacuum circuit breaker branch in parallel. Compared with the prior art, the current injection type mechanical high-voltage DC circuit breaker has the advantages of fast arc extinguishing, breaking and the like.

Description

technical field [0001] The invention relates to the field of mechanical high-voltage direct-current circuit breakers, in particular to a current-injection mechanical high-voltage direct-current circuit breaker with selection of input current direction. Background technique [0002] The structure of the mechanical high-voltage DC circuit breaker is as follows: figure 1 shown. It includes three branches: the first branch is composed of a high-voltage vacuum circuit breaker, the second branch is a current transfer branch, which is a branch where a charging capacitor and an inductor are connected in series to form a high-frequency current; the third branch is a lightning arrester branch. Arcing starts in the high-voltage vacuum circuit breaker after branch one is opened, and the IGCT switch of branch two is quickly closed (generally, the time difference is milliseconds), and the high-frequency current is rushed into branch one, so that the high-voltage vacuum circuit breaker fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/087
CPCH02H3/087
Inventor 淡淑恒胡德霖
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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