A Solid State DC Circuit Breaker Based on Coupled Inductor

A technology of DC circuit breakers and coupled inductors, which is applied to emergency protection circuit devices, circuit devices, emergency protection circuit devices, etc. for limiting overcurrent/overvoltage, can solve problems such as unbalanced current distribution of power electronic devices, and achieve Suppress uneven dynamic and static current distribution, prolong service life, and facilitate reliable shutdown

Active Publication Date: 2021-05-28
XI AN JIAOTONG UNIV
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  • Claims
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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the purpose of the present disclosure is to provide a solid-state DC circuit breaker based on coupled inductance, by introducing coupling inductance connected with different terminals in each branch of the solid-state DC circuit breaker paralleled power electronic devices, to The magnetic field is used as a medium to convert energy and transfer current, so as to solve the problem of unbalanced current distribution among power electronic devices in parallel branches

Method used

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  • A Solid State DC Circuit Breaker Based on Coupled Inductor
  • A Solid State DC Circuit Breaker Based on Coupled Inductor
  • A Solid State DC Circuit Breaker Based on Coupled Inductor

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[0040] The following will refer to the attached Figure 1(a) to Figure 6(c) 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.

[0041] 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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Abstract

The present disclosure discloses a solid-state circuit breaker based on coupled inductance, including: N parallel-connected current-carrying branches, buffer branches and energy-consuming branches, the N parallel-connected current-carrying branches and buffer branches and energy-consuming branches are connected in parallel in sequence; wherein, among the N current-carrying branches connected in parallel, each current-carrying branch includes power electronic devices, a first inductance coil and a second inductance coil connected in series; each The inductance coil in the current-carrying branch is connected to the opposite end of the inductance coil in the adjacent current-carrying branch to form a coupling coil. The disclosure introduces coupling inductors into solid-state DC circuit breakers, which can effectively suppress the problem of uneven dynamic and static current distribution of power electronic devices in each parallel branch, avoid overcurrent damage to devices, and protect and prolong the service life of power electronic devices. The service life is conducive to the reliable shutdown of solid-state DC circuit breakers.

Description

technical field [0001] The present disclosure relates to a current sharing method for parallel-connected power electronic devices, in particular to a solid-state DC circuit breaker based on coupled inductance. Background technique [0002] Compared with the AC grid, the DC grid has the advantages of fewer transformation links, high energy utilization rate, good power flow control, low line cost, high active power, and fast adjustment speed. It is an important direction for the future development of smart grids. In addition, the development of multi-terminal flexible DC transmission technology also provides an effective solution to the inherent dispersion, small size, and distance from the load center of renewable clean energy such as wind energy and solar energy. [0003] However, after a short-circuit fault occurs in the DC system, the current rise rate is high, and the fault propagation speed is fast. If the fault is not removed in time, it will easily cause the collapse o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/087H02H9/04H02H9/02
CPCH02H3/087H02H9/02H02H9/04
Inventor 吴益飞吴翊荣命哲杨飞易强肖宇
Owner XI AN JIAOTONG UNIV
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