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DC Circuit Breaker Based on Coupled Inductor Coil and Its Control Method

A technology of DC circuit breakers and coupled inductors, applied in circuits, circuit devices, emergency protection circuit devices, etc., can solve problems such as limiting the application of circuit breakers and not having the ability to turn off, and achieve volume reduction, prevent chain protection, and components little effect

Active Publication Date: 2020-07-14
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the thyristor is a semi-controlled device, it does not have the ability to turn off, which limits its application in circuit breakers.

Method used

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  • DC Circuit Breaker Based on Coupled Inductor Coil and Its Control Method
  • DC Circuit Breaker Based on Coupled Inductor Coil and Its Control Method
  • DC Circuit Breaker Based on Coupled Inductor Coil and Its Control Method

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0034] Such as figure 1 As shown, the present invention is based on the DC circuit breaker of the coupled inductance coil by the main switch thyristor T 1 , coupled inductive coil I, inductive freewheeling circuit II, energy storage capacitor and its charge and discharge unit III, and manual shutdown unit IV, the coupled inductive coil I includes a primary side coil N coupled through a magnetic core 1 and the secondary coil N 2 , where the main switching thyristor T 1 The anode is connected to ...

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Abstract

The invention provides a coupling inductance coil-based DC circuit breaker and a control method thereof. The DC circuit breaker is composed of a main switch thyristor, a coupling inductance coil, an inductance follow-current circuit, an energy storage capacitor, a charge and discharge unit of the energy storage capacitor, and a manual turn-off unit. The coupling inductance coil comprises a primary side coil and a secondary side coil which are coupled through a magnetic core. The anode of the main switch thyristor is connected with the positive electrode of a direct current system. The cathode of the main switch thyristor is connected with the dotted terminal of the primary side coil of the coupling inductance coil. According to the invention, the fault isolation is realized by using the induction current of the coupling inductance coil in the fault transient state to enable the current of the main switch thyristor to be in the zero-crossing state. Therefore, the DC circuit breaker is low in cost and low in on-state loss. The rapid and automatic protection of the direct-current short circuit and overload faults can be realized. Moreover, the impact of the fault current on the power supply side can be avoided.

Description

technical field [0001] The present invention relates to a DC circuit breaker and a control method thereof, in particular to a DC circuit breaker based on a coupled inductance coil and a control method thereof. Background technique [0002] With the development of power electronic devices, the advantages of DC transmission and distribution technology have become increasingly prominent. Compared with the traditional AC power transmission and distribution technology, the DC power transmission and distribution technology has the advantages of low line cost, low transmission loss, large transmission capacity, and stable reactive power angle. It is more compatible with renewable energy such as solar energy, wind energy, and fuel cells. Adapt to the high-efficiency access of DC loads such as LEDs, computers, and electric vehicles. [0003] Like the AC system, the safe and reliable operation of the DC power transmission and distribution system is also inseparable from the protectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/0814H03K17/723H02H3/087
CPCH02H3/087H03K17/08144H03K17/723
Inventor 姜建国周中正张丹李洪亮罗乔树通
Owner SHANGHAI JIAOTONG UNIV
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