Current-limiting hybrid DC circuit breaker
A DC circuit breaker and circuit breaker technology, applied in the direction of circuits, emergency protection circuit devices, electrical components, etc., can solve the problems of large breaking current, slow recovery speed of mechanical fracture insulation, and high energy consumption requirements of lightning arresters, so as to reduce the use, Effect of reducing control complexity and manufacturing cost, reducing current breaking requirements
Active Publication Date: 2020-10-23
XI AN JIAOTONG UNIV +3
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Problems solved by technology
[0005] In view of the deficiencies in the prior art, the purpose of this disclosure is to provide a current-limiting hybrid DC circuit breaker, which can solve the problems of slow mechanical fracture insulation recovery speed, large breaking current and lightning arrester through the design of the main current circuit and current transfer circuit. High energy requirements and other issues
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[0045] The following will refer to the attached figure 1 to attach Figure 8 Specific embodiments of the present disclosure are described in 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.
[0046] 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...
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The invention discloses a current-limiting hybrid DC circuit breaker, which comprises a main current loop, a current transfer loop, a first incoming / outgoing line end and a second incoming / outgoing line end, and is characterized in that the main current loop and the current transfer loop are connected in parallel, wherein the main current loop comprises a high-speed mechanical switch and an auxiliary current transfer module which are connected in series, one side of a high-speed mechanical switch is connected with a first incoming / outgoing line end, the other side of the high-speed mechanicalswitch is connected with the auxiliary current transfer module, and the other side of the auxiliary current transfer module is connected with a second incoming / outgoing line end; the current transferloop comprises a first transfer branch, a second transfer branch, a third transfer branch and a fourth transfer branch, and the first transfer branch and the fourth transfer branch form a bridge circuit and are used for realizing bidirectional breaking of fault current; the second transfer branch is used for limiting the system fault current and completing dissipation of electromagnetic energy atthe same time; and the third transfer branch is used for realizing breaking of the system fault current.
Description
technical field [0001] The disclosure belongs to the technical field of circuit breakers, and in particular relates to a current-limiting hybrid DC circuit breaker. Background technique [0002] With the year-by-year increase in the installed capacity of distributed energy and the increase in the capacity of the power system, the DC power grid has become the development direction of the future power grid. However, the DC system still faces many potential problems, the most serious of which is the DC short-circuit fault. Due to the small short-circuit impedance of the DC system, the fault current rises rapidly, which will cause impact on the system equipment. The DC circuit breaker is the most effective way to quickly isolate the short-circuit fault. Prospect solution. [0003] At present, DC circuit breakers mainly include mechanical DC circuit breakers, solid-state DC circuit breakers and hybrid DC circuit breakers. Mechanical DC circuit breakers require pre-charging capa...
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IPC IPC(8): H02H7/26H01H9/54
CPCH01H9/542H01H9/547H01H2009/543H01H2009/544H02H7/268
Inventor 杨飞彭孙宏浩王洪佑李新吴益飞吴翊荣命哲时珊珊王皓靖
Owner XI AN JIAOTONG UNIV