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Initiative-short-circuit high-voltage direct-current circuit breaker

An active short-circuit, high-voltage direct current technology, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve the problem of large turn-off delay, high cost, low voltage level, etc. problem, achieve the effect of small turn-off delay, improve utilization rate, and reduce turn-off delay

Active Publication Date: 2017-01-04
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of the current high-voltage DC circuit breaker, such as low voltage level, large turn-off delay, and high cost

Method used

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Embodiment Construction

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0017] Such as figure 1 As shown, the active short-circuit high-voltage DC circuit breaker includes: an active short-circuit unit 1, a circuit breaker unit 2, an energy absorption circuit 3, and a current-limiting reactor 4; wherein the active short-circuit unit is such as figure 2 As shown, the breaking unit as image 3 As shown, the energy absorbing circuit as Figure 4 shown;

[0018] During normal operation, the full-control device in the dotted line frame 5 of the active short-circuit unit is locked, and is controlled according to the control strategy of the converter station, which has the same function as the converter station; The type device is turned on, and the unit normally flows a DC current; the semi-controlled device in the dotted line frame 9 in the energ...

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Abstract

The invention relates to an initiative-short-circuit high-voltage direct-current circuit breaker, belonging to the technical field of high-voltage and ultrahigh-voltage direct-current power transmission. The initiative-short-circuit high-voltage direct-current circuit breaker comprises an initiative short circuit unit, a cut-off unit and an energy absorption circuit, wherein the initiative short circuit unit consists of a converter station of an improved structure; the cut-off unit comprises a rapid mechanical switch, a current transfer switch and a metal oxide lightning arrester; the energy absorption circuit consists of a thyristor and a metal oxide lightning arrester; when the initiative-short-circuit high-voltage direct-current circuit breaker is normally operated, the initiative short circuit unit is used as a converter station to operate, the cut-off unit is serially connected into the circuit, one end of the energy absorption circuit is connected with the circuit, and the other end is selectively connected with a cathode of the circuit or the ground according to a single-bipolar operation way; and when the initiatively-short-circuit high-voltage direct-current breaker is in failure, by cooperatively controlling the initiative short circuit unit, the cut-off unit and the energy absorption circuit, the elimination and isolation of the failure can be realized.

Description

technical field [0001] The invention relates to an active short-circuit high-voltage direct current circuit breaker, which belongs to the field of high-voltage and ultra-high voltage direct-current transmission. Background technique [0002] Due to many advantages, high-voltage and ultra-high-voltage direct current transmission have received more and more attention. In the future, multi-terminal direct current transmission and the direct current grid constructed from this will become a trend. However, the current of high-voltage direct current transmission has no zero crossing point and cannot be used like AC transmission. The use of zero-crossing point arc extinguishing brings great difficulties to the realization of DC circuit breakers. The current implementation methods are divided into the following types: based on superimposed oscillating current to generate current zero-crossing point, and then realize current breaking. The disadvantage is that the shutdown delay is too...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H9/00
CPCH02H7/262H02H7/268H02H9/00
Inventor 赵成勇李帅许建中
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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