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Bi-directional DC solid-state circuit breaker

A solid-state circuit breaker, bidirectional DC technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as one-way energy flow, load and power supply not sharing ground, feedback large current, etc., to reduce complexity and facilitate practicality. The effect of promotion and cost reduction

Active Publication Date: 2018-09-28
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0006] In order to overcome the disadvantages of the existing one-way circuit breaker that can only realize energy flow in one direction and the circuit structure load of the two-way circuit breaker, the load and the power supply are not in the same ground, and feedback large current, etc., the present invention provides a new type of bidirectional DC solid-state circuit breaker The circuit topology of the

Method used

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Embodiment Construction

[0015] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0016] The technical scheme that the present invention takes is, as figure 1 Shown:

[0017] The topology of the bidirectional DC circuit breaker is composed of a three-coil transformer module 1 , a first diode 2 , a second diode 3 , a first thyristor 4 , a second thyristor 5 and a capacitor 6 . The first lead-out terminal of the transformer module 1 is connected to the cathode of the first thyristor 4; the second lead-out terminal of the transformer module is connected to the cathode of the second thyristor 5; the third lead-out terminal of the transformer module 1 is connected to the anode of the capacitor 6; the transformer module The three coils of 1 intersect at connection point 7; the positive pole of the first diode 2 and the positive pole of the second diode are connected at point 8 and connected with the transformer three-coil connection point 7; the ne...

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Abstract

The invention relates to a bi-directional DC solid-state circuit breaker. The bi-directional DC solid-state circuit breaker comprises a three-coil transformer module, a first diode, a second diode, afirst thyristor, a second thyristor and a capacitor; the circuit topology adopts the three-coil transformer to realize the bi-directional flow of the energy; the circuit topology realizes the common-group of the power supply and the load, and facilitates the practical popularization; a semiconductor switch component used in the circuit topology is less, the complexity of the circuit is reduced, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of direct current circuit breakers, and in particular relates to a circuit structure of a novel bidirectional direct current solid state circuit breaker. Background technique [0002] The solid-state circuit breaker is a new type of electric power automation equipment that can quickly cut off the fault current when a circuit fault occurs. It has the advantages of fast response, short switching time, and high reliability. It is one of the key equipment to ensure the stability, safety and reliability of the DC transmission and distribution system and the DC grid system. [0003] At present, DC circuit breakers are mainly divided into three categories, namely, pure mechanical DC circuit breakers that use traditional mechanical switches to break, all solid-state circuit breakers that use power electronic devices (SCR, IGBT) to break, and hybrids that combine the two forms. circuit breaker. However, mechanical ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26
CPCH02H7/268
Inventor 李伟林王雨峰安凌岳冯首鸿
Owner NORTHWESTERN POLYTECHNICAL UNIV
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