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Two-way hybrid DC circuit breaker for medium voltage distribution network and cut-off method

A DC circuit breaker, a hybrid technology, applied in the direction of circuit devices, emergency protection circuit devices, emergency protection devices with automatic disconnection, etc., can solve the problem that it is difficult to adapt to the high current demand of the DC system, and the mechanical circuit breaker has limited breaking capacity , It is difficult to adapt to the development needs of high voltage and high current, etc.

Active Publication Date: 2017-08-18
STATE GRID CORP OF CHINA +2
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Problems solved by technology

Mechanical circuit breakers have limited breaking capacity and long breaking time, making it difficult to adapt to the development needs of high voltage and high current in the current power system
All-solid-state DC circuit breakers have large on-state losses and limited flow capacity, and it is also difficult to adapt to the high-current requirements of the DC system.

Method used

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  • Two-way hybrid DC circuit breaker for medium voltage distribution network and cut-off method
  • Two-way hybrid DC circuit breaker for medium voltage distribution network and cut-off method
  • Two-way hybrid DC circuit breaker for medium voltage distribution network and cut-off method

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Embodiment Construction

[0041] 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.

[0042] 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 spe...

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Abstract

The invention provides a two-way hybrid DC circuit breaker for a medium voltage distribution network and a cut-off method. The two-way hybrid DC circuit breaker comprises a circuit breaker main body, a signal collection system, a signal processing system, a control system, an operation mechanism and a human-computer interaction interface, the shown circuit breaker is added with a negative feedback link for feeding back an environment temperature and a drive circuit capacitance voltage signal to the control system, therefore a contact terminal can be accurately turned on at an expected moment so as to realize accurate opening and closing operations, a group of oscillation circuits realize two-way cut-off by means of the integration of the oscillation circuits and bridge circuits, and the demand of two-way cut-off in a new energy power supply system is satisfied.

Description

technical field [0001] The invention relates to a bidirectional hybrid DC circuit breaker and a breaking method thereof for a medium-voltage distribution network, in particular to a circuit breaker which realizes opening and closing by controlling an electromagnetic repulsion operating mechanism through a DC loop current signal. Background technique [0002] With the gradual depletion of fossil energy and the further aggravation of environmental pollution, the development of clean and renewable energy has gradually become a hot issue in the power industry. However, compared with traditional energy sources, new energy sources have obvious defects such as unstable output characteristics and scattered energy distribution. According to the different capacity of new energy in my country, medium and high voltage lines are connected to the transmission network, and low-voltage lines are connected to the distribution network. No matter which method is used, the impact on the tradit...

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Application Information

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IPC IPC(8): H02H3/087
CPCH02H3/087
Inventor 韩桂全吴军辉苏扬郭佳豪易强吴益飞
Owner STATE GRID CORP OF CHINA
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