Mixed type direct-current circuit breaker and switching-off method thereof

A DC circuit breaker and hybrid technology, applied in the application field of the class field, can solve the problem that a single fracture cannot solve the insulation problem and so on.

Inactive Publication Date: 2017-09-15
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, as the voltage level increases, the series connection of multiple single-stage circuit breaker

Method used

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  • Mixed type direct-current circuit breaker and switching-off method thereof
  • Mixed type direct-current circuit breaker and switching-off method thereof
  • Mixed type direct-current circuit breaker and switching-off method thereof

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Embodiment Construction

[0037] Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0038]It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that they may use different terms to refer to the same component. The specification and claims do not use differences in nouns as a way of distinguishing components, but use differences in functions of components as a criterion for distinguishing. "Includes" or "comprises" mentioned throughout the spec...

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Abstract

The invention discloses a mixed type direct-current circuit breaker and a switching-off method thereof. The circuit breaker consists of multiple serially connected same circuit breaker modules. Each circuit breaker module comprises a main current loop, a current transferring branch, an overvoltage limiting branch and an online monitoring system. A high speed mechanical switch, the current transferring branch and the overvoltage limiting branch are parallelly connected. Through serial connection of the multiple serially connected same circuit breaker modules, the application voltage grade can be increased; breaking of a short circuit of a high voltage system is achieved; and by controlling parts of the circuit breaker modules to carry out switching-off actions, a short circuit current limiting function under the condition of the high voltage grade is achieved.

Description

technical field [0001] The invention relates to a hybrid direct current circuit breaker and a breaking method thereof, in particular to an application in the field of realizing high voltage levels by connecting a plurality of hybrid direct current circuit breaker modules in series. Background technique [0002] Compared with the traditional AC power transmission and distribution system, the DC power transmission and distribution system has the following advantages: narrower transmission corridor, large transmission capacity, and lower transmission loss. Compared with the AC power grid, the DC power grid does not have stability problems and has no harmonic Waves, tides are easier to control. However, since there is no natural zero-crossing point in the DC system, the arc cannot be extinguished after the fracture is formed, and the current zero-crossing point must be artificially created to extinguish the arc. The hybrid DC circuit breaker composed of high-speed mechanical sw...

Claims

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Application Information

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IPC IPC(8): H02H3/087H02H3/10H02H3/02
CPCH02H3/021H02H3/087H02H3/10
Inventor 胡杨郭安祥易强张含天苏扬刘子瑞郭佳豪吴翊
Owner STATE GRID CORP OF CHINA
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