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Novel rapid mechanical-type high-voltage direct current breaker

A high-voltage DC, mechanical technology, used in emergency protection circuit devices, protection against overcurrent, electrical components, etc., can solve problems such as low reliability, avoid breaking failures, reduce costs, and increase breaking The effect of reliability

Inactive Publication Date: 2018-01-09
CHINA SOUTH POWER GRID ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide a new type of fast mechanical high-voltage DC circuit breaker for the low reliability of traditional mechanical DC circuit breakers.

Method used

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  • Novel rapid mechanical-type high-voltage direct current breaker
  • Novel rapid mechanical-type high-voltage direct current breaker

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Embodiment Construction

[0015] The specific implementation of the novel fast mechanical high-voltage DC circuit breaker of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0016] refer to figure 1 with figure 2 , figure 1 It is a structural schematic diagram of a new fast mechanical high-voltage DC circuit breaker, and FIG. 2 is a structural schematic diagram of a new fast mechanical high-voltage DC circuit breaker of an embodiment. The new fast mechanical high-voltage DC circuit breaker includes: main fracture branch 10 , the commutation branch 20, the energy absorption branch 30 and the commutation charging branch 40;

[0017] The commutation branch 20, the energy absorption branch 30 and the main fracture branch 10 are connected in parallel, and the two ends of the parallel connection are connected in series to the DC transmission line;

[0018] The commutation branch 20 includes a power electronic trigger switch 202 and a pre-charging ca...

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Abstract

The present invention relates to a novel rapid mechanical-type high-voltage direct current breaker. The breaker comprises a main fracture branch, a commutation branch, an energy-absorbing branch and acommutation charging branch. The commutation branch, the energy-absorbing branch and the main fracture branch are connected in parallel, two ends of the parallel circuit are connected in series in adirect current transmission circuit, the commutation branch comprises a power trigger electronic switch and a pre-charging capacitor, the power trigger electronic switch is connected in series in thepre-charging capacitor and then is connected in the direct current transmission circuit, the commutation charging branch is connected in parallel with the pre-charging capacitor in the commutation branch to charge the pre-charging capacitor, the main fracture branch comprises a mechanical switch and a saturation resistor, and the mechanical switch and the saturation resistor are connected in series and are connected in the direct current circuit. A transient current flowing through the saturation resistor is small prior to open-circuit fault current zero crossing to allow the saturation resistor to be worked in an unsaturated area, and inductance value is large, a rate of descent of a fault current prior to zero crossing is reduced, the reliability of an opening circuit is increased, and the cost of a device is reduced.

Description

Technical field [0001] The present invention relates to the technical field of DC circuit breakers, and in particular to a new type of fast mechanical high-voltage DC circuit breaker. Background technique [0002] The multi-terminal flexible DC transmission system is very sensitive to DC side short-circuit faults. When a short-circuit fault occurs in the multi-terminal flexible DC transmission system, the high-voltage DC circuit breaker can directly cut off and isolate the fault point before the converter is blocked. Except for the faulty line, the entire The system can still run normally. Therefore, the high-voltage DC circuit breaker is one of the key devices to ensure the stable and reliable operation of the multi-terminal flexible DC transmission system. [0003] DC circuit breakers can be divided into three types in principle: mechanical DC circuit breakers, solid-state DC circuit breakers and hybrid DC circuit breakers. Among them, mechanical DC circuit breakers have...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02H3/08
Inventor 张祖安陈名黎小林李岩许树楷赵晓斌
Owner CHINA SOUTH POWER GRID ELECTRIC POWER RES INST
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