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A bridge circuit, high voltage DC circuit breaker and control method thereof

A bridge circuit and branch circuit technology, applied in circuit devices, emergency protection circuit devices, electrical components, etc., can solve problems such as short-circuit discharge of bridge arms and damage to power semiconductor switching devices, achieve less buffer circuits, and facilitate series voltage equalization. , the effect of large installation space

Active Publication Date: 2018-03-13
NR ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the current breaking operation of the DC circuit breaker is completed, the capacitor of the full-bridge / half-bridge converter has a high voltage. Damaged power semiconductor switching device

Method used

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  • A bridge circuit, high voltage DC circuit breaker and control method thereof
  • A bridge circuit, high voltage DC circuit breaker and control method thereof

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Embodiment Construction

[0032] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] Such as figure 1 As shown, the present invention provides a bridge circuit, including an H-bridge switch module and an RCD buffer module, wherein the H-bridge switch module includes 4 power semiconductor switch devices Q1-Q4, and each power semiconductor switch device is connected to a Anti-parallel diodes; Q1 and Q2 are connected in series in the same direction to form the first bridge arm, specifically connecting the negative pole of Q1 to the positive pole of Q2, and Q3 and Q4 are connected in series in the same direction to form the second bridge arm, specifically connecting the negative pole of Q3 to the positive pole of Q4 Positive connection; connect the first and second bridge arms in parallel, that is, connect the positive pole of Q1 to the positive pole of Q3, connect the negative poles of Q2 and Q4, and connect the midpoin...

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PUM

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Abstract

The invention discloses a bridge circuit, which includes an H-bridge switch module and an RCD buffer module. The H-bridge switch module includes four power semiconductor switch devices, and every two power semiconductor switch devices are connected in series in the same direction to form a bridge arm. It is connected in parallel, and the midpoints of the two bridge arms are respectively used as the input end and the output end; the RCD buffer module includes a diode and a capacitor connected in series, and resistors are connected in parallel at both ends of the diode and the capacitor; the RCD buffer module and every two power semiconductor switching devices The bridge arms formed in series are connected in parallel. The circuit contains a small number of RCD buffer modules and a large installation space. The invention also discloses a high-voltage direct current circuit breaker formed by cascading the aforementioned bridge circuits, which has the function of reclosing. The invention also discloses a control method of the high voltage direct current circuit breaker.

Description

technical field [0001] The invention belongs to the technical field of circuit breakers, and in particular relates to a bridge circuit and a control method thereof, and a high-voltage direct current circuit breaker based on the bridge circuit and a control method thereof. Background technique [0002] With the development of multi-terminal DC transmission technology, high-voltage DC circuit breakers will become one of the key equipment to ensure the safe and stable operation of the system. [0003] Chinese Patent Publication No. CN102823121A discloses a switch module in a device for limiting the current of a power transmission or distribution line and making it open. An RCD snubber circuit is connected in parallel at both ends of the power semiconductor switching device, or every two are reversely connected in series. The connected power semiconductor switching devices share a full-bridge RCD snubber circuit. Due to the large breaking current of the DC circuit breaker, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/087H02H3/06
Inventor 石巍曹冬明方太勋谢晔源杨兵王宇吕玮刘彬
Owner NR ELECTRIC CO LTD
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