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Direct current limiting off-on device

A technology of current and mechanical switches, applied in the field of DC current limiting breaking devices, can solve the problems of inability to turn off current, and the breaking time is difficult to meet the needs of DC transmission systems.

Active Publication Date: 2017-08-18
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different from the AC system, the current of the DC system does not have a natural zero-crossing point, so the natural zero-crossing point of the current cannot be used in the DC system like the AC system. Therefore, the breaking of the DC current has always been a problem worth studying. Subject
The hybrid circuit breaker manufactured by using this principle has special requirements for mechanical switches, and it is difficult to meet the requirements of the DC transmission system in terms of breaking time.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0039] figure 1 Shown is Example 1 of the present invention. like figure 1As shown, the DC current limiting breaking device of the present invention is composed of three combined circuits 31, 32, 33, two mechanical switches 22, 24, two electronic switches 23, 25 and two inductors 21, 26; the first inductor 21, the first lead-out terminal of the first diode 111, the first lead-out terminal of the first thyristor 112, the first lead-out terminal of the first resistor 113, the first lead-out terminal of the first arrester 27, the first The first lead-out terminal of the three lightning arresters 116 and the first lead-out terminal of the first mechanical switch 22 are connected at the sixth connection point 6; the second lead-out terminal of the first mechanical switch 22 and the first lead-out terminal of the first electronic switch 23 Seven connection points 7 are connected; the second lead-out terminal of the first electronic switch 23, the first lead-out terminal of the sec...

Embodiment 2

[0047] figure 2 Shown is Example 2 of the present invention. like figure 2 As shown, the DC current limiting breaking device of the present invention is composed of three combined circuits 41, 42, 43, two mechanical switches 22, 24, two electronic switches 23, 25 and two inductors 21, 26; the first inductor 21, the first lead-out terminal of the first thyristor 211, the first lead-out terminal of the first diode 212, the first lead-out terminal of the first resistor 213, the first lead-out terminal of the first arrester 27, the first lead-out terminal of the first The first lead-out terminal of the three arresters 216 and the first lead-out terminal of the first mechanical switch 22 are connected at the sixth connection point 6; the second lead-out terminal of the first mechanical switch 22 and the first lead-out terminal of the first electronic switch 23 Seven connection points 7 are connected; the second lead-out terminal of the first electronic switch 23, the first lead...

Embodiment 3

[0055] image 3 Shown is Example 3 of the present invention. like image 3 As shown, the DC current limiting breaking device of the present invention is composed of three combined circuits 51 , 52 , 53 , a mechanical switch 22 , an electronic switch 23 and two inductors 21 , 26 . The second lead-out terminal of the first inductor 21, the first lead-out terminal of the first diode 311, the first lead-out terminal of the first thyristor 312, the first lead-out terminal of the first resistor 313, the first lead-out terminal of the first arrester 27 terminal, the first lead-out terminal of the second arrester 316, the first lead-out terminal of the third arrester 328, the first lead-out terminal of the first mechanical switch 22, the first lead-out terminal of the second diode 321 and the second thyristor 322 The first lead-out terminal is connected at the sixth connection point 6; the second lead-out terminal of the first mechanical switch 22 and the first lead-out terminal of ...

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Abstract

The invention relates to a direct current limiting off-on device, comprising three combined loop circuits (31,32,33), two mechanical switches (22,24), two electronic switches (23,25) and two electric inductors (21,26). The device can be structured in four manners. With the device, it is possible to realize direct current limiting and direct-current-off and direct-current-on quickly so as to reduce the impacts of the DC faulty current on the conversion valve.

Description

technical field [0001] The invention relates to a direct current limiting breaking device. Background technique [0002] Fast DC circuit breaker is one of the key equipment to ensure the stable, safe and reliable operation of DC power transmission and distribution system and DC grid system. Different from the AC system, the current of the DC system does not have a natural zero-crossing point, so the natural zero-crossing point of the current cannot be used in the DC system like the AC system. Therefore, the breaking of the DC current has always been a problem worth studying. topic. [0003] At present, there are usually two ways to break DC current. The first is a pure power electronic circuit breaker, such as ABB's patent CN102170181A, which can turn off power electronic devices with high power and directly break DC current. Although the solid-state circuit breaker manufactured by this principle can meet the requirements of the multi-terminal flexible DC system in terms o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/087
CPCH02H3/087
Inventor 肖立业韦统振尹靖元滕尚甫王欣未张志丰邱清泉
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI