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High-voltage DC circuit breaker and energy supply device thereof

A high-voltage DC and circuit breaker technology, applied in the parallel operation of circuit devices, transformers, and DC power supplies, etc., can solve problems such as large footprint and large volume, reduce voltage insulation requirements, improve operational reliability, and ensure power supply security. Effect

Active Publication Date: 2018-12-07
XJ ELECTRIC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-voltage DC circuit breaker and its energy supply device, which are used to solve the problems of large volume and large floor space when two sets of independent energy supply transformers are used as redundant backup

Method used

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  • High-voltage DC circuit breaker and energy supply device thereof
  • High-voltage DC circuit breaker and energy supply device thereof
  • High-voltage DC circuit breaker and energy supply device thereof

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Embodiment Construction

[0029] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] Embodiment of the energy supply device of the high-voltage DC circuit breaker:

[0031] The energy supply device provided by the present invention includes n cascaded energy supply transformers and m cascaded isolation transformers, n and m can be set according to actual conditions, for example, n=3 and m=3 can be set. For each level of energy supply transformer and isolation transformer, a set of transformer core T1, two sets of primary (low voltage) windings W1 and W2 with independent rated capacity and secondary windings corresponding to two sets of primary windings W1 and W2 are used. (High voltage) windings W3 and W4, two sets of independent one-side windings and secondary windings realize redundant backup. Among them, the number of winding turns of the primary side winding W1 and W2 is the same, and the design rated power is al...

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Abstract

The invention relates to a high-voltage DC circuit breaker and an energy supply device thereof. The energy supply device comprises n cascaded energy supply transformers, wherein the energy supply transformer of each stage comprises a set of iron core, two sets of primary windings which are mutually redundant and two sets of secondary windings which are mutually redundant; the two sets of primary windings of the first stage energy supply transformer are used for coupling with two energy supply power sources which are mutually redundant respectively; and the two sets of secondary windings of theenergy supply transformer of each stage are each provided with an output terminal for supplying energy to corresponding valve layers in a valve tower of the DC circuit breaker. Through serially connecting multi-stage transformer in series, the transformer of each stage adopts one set of transformer iron core, two sets of primary windings and two sets of secondary windings, the two sets of primarywindings serve as two sets of power sources used for redundant power supply to the corresponding layer power module of the DC circuit breaker, the redundant standby of the energy supply device can berealized without increasing the size and floor space of the energy supply transformers, and the operational reliability of the high-voltage DC circuit breaker can be improved.

Description

technical field [0001] The invention relates to a high-voltage direct current circuit breaker and an energy supply device thereof, belonging to the technical field of high-voltage direct current circuit breakers. Background technique [0002] High-voltage DC circuit breakers are the main equipment to ensure the safe operation of DC transmission systems. Compared with mechanical DC circuit breakers, they operate faster and usually cut off the fault current within 3 milliseconds. The fast action of the high-voltage DC circuit breaker is realized by the fast switching function of the power electronic device, that is, the IGBT connected in series, and the fast action of the high-speed mechanical isolating switch. Since the terminal voltage is very low when the high-voltage DC circuit breaker is closed, the high-voltage DC circuit breaker cannot provide power supply by self-energy extraction. However, the reliable operation of IGBT and high-speed mechanical isolating switch requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H02J1/10H01F38/00
CPCH01F38/00H01F2038/006H02J1/10H02J9/06H02J9/067
Inventor 李娟范彩云李生林李凯常忠廷王永康
Owner XJ ELECTRIC
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