A Modularized Mechanical DC Circuit Breaker and Its Breaking Method
A DC circuit breaker, modular technology, applied in the direction of circuits, electric switches, circuit devices, etc., can solve the problems of poor fracture insulation recovery ability, high capacitor pre-charging voltage, long breaking time of small current, etc., and achieve fracture insulation recovery Good results
Active Publication Date: 2021-08-27
XI AN JIAOTONG UNIV
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- Description
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- Application Information
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Problems solved by technology
At the same time, the traditional mechanical DC circuit breaker has the disadvantages of long breaking time for small current and poor fracture insulation recovery ability due to the need to break short-circuit and large current, and the capacitor pre-charge voltage of the current transfer branch is high.
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[0042] The following will refer to the attached Figure 1 to Figure 5 Specific embodiments of the present disclosure are described in more detail. Although specific embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0043]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 "co...
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The disclosure discloses a modularized mechanical DC circuit breaker and its breaking method, including: a main current loop, a current transfer branch, an overvoltage limiting branch, an online monitoring system, a control system, and a first input / output terminal and the second input / output terminal, the main current loop is connected in parallel with the current transfer branch and the overvoltage limiting branch; the main current loop includes a high-speed mechanical switch, and one side of the high-speed mechanical switch is connected to the first The input / output terminal, the other side is connected to the second input / output terminal; the current transfer branch includes a control module, a transfer capacitor module and an inductor connected in series; the transfer capacitor module includes n series-connected oscillation units, each An oscillating unit includes a pre-charged transfer capacitor, an oscillating inductance and a control device, and the oscillating inductance and the control device are connected in parallel with the pre-charged transfer capacitor after being connected in series. The circuit breaker solution proposed in the present disclosure has the advantages of low cost, fast breaking speed in the full current range, good fracture insulation recovery, and the like.
Description
technical field [0001] The present disclosure relates to a DC circuit breaker, in particular to a modularized mechanical DC circuit breaker. Background technique [0002] Mechanical DC circuit breakers have the advantages of stable operation, high reliability, and low on-state loss, and have attracted extensive attention from scholars in the industry. With the further development of the DC power supply system, most of the loads in the new DC system have the characteristics of dual properties of load and power supply. This feature makes the flow of current and energy in the DC power grid uncertain, thus putting forward the requirement of bidirectional breaking for the DC circuit breaker. The DC circuit breaker working in this kind of DC system is not like the current flow direction of the power supply system where the traditional circuit breaker works. Most of the mechanical DC circuit breakers at the present stage realize the artificial zero-crossing point by creating an o...
Claims
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IPC IPC(8): H02H7/26H02H3/02H01H9/56
CPCH01H9/56H02H3/021H02H7/268
Inventor 吴益飞高翀彭孙宏浩吴翊杨飞荣命哲
Owner XI AN JIAOTONG UNIV