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DC Circuit Breaker Based on Forced Resonance Commutation Principle

A DC circuit breaker and resonance technology, which is applied in the field of DC circuit breakers, can solve the problems of complex control of power electronic devices, long time required, and high cost, and achieve the goals of improving the success rate of shutdown, shortening the arcing time, and reducing maintenance costs. Effect

Active Publication Date: 2022-04-15
SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the mechanical DC circuit breaker can be divided into passive oscillation technology and active oscillation technology. Since the mechanical DC circuit breaker uses capacitors, there are problems that the equipment is very large and it takes a long time to break the small current condition. shortcoming
The hybrid DC circuit breaker combines mechanical switches and power electronics technology, and can use power electronic devices that can be turned off to establish a reverse voltage. higher

Method used

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  • DC Circuit Breaker Based on Forced Resonance Commutation Principle
  • DC Circuit Breaker Based on Forced Resonance Commutation Principle
  • DC Circuit Breaker Based on Forced Resonance Commutation Principle

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Embodiment Construction

[0048] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0049] In the description of this application, it should be noted that the orientation or positional re...

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Abstract

The present application provides a DC circuit breaker based on the principle of forced resonance commutation, which relates to the technical field of medium and high voltage circuit breakers. The device includes a flow branch, a forced resonance commutation branch and a control unit, the flow branch and the forced resonance commutation branch are connected in parallel; the flow branch is connected in series in the power system for transmitting current; the flow branch The forced resonance commutation branch includes a series excitation unit and a resonance unit. The control unit is connected with the mechanical switch and the excitation unit, and is used to issue an opening action command to the mechanical switch and control the interaction between the excitation unit and the resonance unit. A resonant current is generated to divert the current in the flow branch to the forced resonant commutation branch. The device optimizes the topological structure of the DC circuit breaker, which can reduce the size and cost, and improve the success rate of transferring current and breaking the fault current, and realizes fast and reliable breaking under full-current conditions at various voltage levels.

Description

technical field [0001] The present application relates to the technical field of medium and high voltage circuit breakers, in particular, to a DC circuit breaker based on the principle of forced resonance commutation. Background technique [0002] In recent years, DC grid technology is considered to be a technology with great development potential in modern power systems. When a short-circuit fault occurs in the DC power system, since the short-circuit current in the DC power system will rapidly rise to an extremely high level in a short period of time, and the breaking of the DC fault short-circuit current faces the situation that there is no natural zero-crossing point, so this A corresponding challenge is put forward for the DC circuit breaker, that is, the DC circuit breaker needs to break the DC fault short-circuit current in a very short time, otherwise the grid will face the danger of collapse at any time. [0003] Existing DC circuit breakers include mechanical DC c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/087H02H3/02H02H7/26
CPCH02H3/087H02H3/021H02H7/268
Inventor 周雁南黄瑜珑刘滨胡茂良余占清曾嵘
Owner SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV
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