Topological structure of hybrid all-solid state high-voltage DC breaker

A high-voltage direct current, topological structure technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problem that the DC capacitor and the power body cannot be directly separated, and achieve the effect of modular design, easy complete set, low loss and fast speed

Active Publication Date: 2015-07-01
CHINA XD ELECTRIC CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hybrid all-solid-state high-voltage DC circuit breaker topology, which solves the problem that the DC capacitor and the power body cannot be directly separated

Method used

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  • Topological structure of hybrid all-solid state high-voltage DC breaker
  • Topological structure of hybrid all-solid state high-voltage DC breaker

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] The novel hybrid all-solid-state high-voltage direct current circuit breaker of the present invention is used for closing the rated current and the fault current in the high-voltage direct current system 6 .

[0024] Such as figure 1 As shown, the hybrid new all-solid-state high-voltage DC circuit breaker includes: a fully-controlled device valve 1, a semi-controlled device valve 2, a reactor 4, and isolating switches 51 and 52 connected in series, and connected in series with the fully-controlled device The valve and the arrester 31, 32 are connected in parallel to the valve of the semi-controlled device. Wherein, the full-control device valve includes 2 sets of full-control device units 11 in reverse series, and each full-control device unit is composed of at least two full-control devices in series, and connected in parallel with the full-control device A...

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Abstract

The invention provides a topological structure of a hybrid all-solid state high-voltage DC breaker. The topological structure comprises a full-control device valve, a semi-control device vale and a reactor serially connected in order. The full-control device valve and the reactor are connected with the low voltage end and high voltage end of the DC breaker through disconnectors, respectively. The full-control device valve and the semi-control device valve are parallelly connected with a lightning arrester. By making full use of series features of full-control devices and semi-control devices and features of DC interrupting process, high-voltage high-current interrupting can be achieved through a proper control strategy, the different requirements of the turn-on and turn-off process are met; the topological structure has the advantages such as low manufacturing cost, high reliability, low loss and the like; when a high-voltage high-current power transmission system fails, the faulted current can be quickly interrupted to remove a fault point.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and relates to a hybrid all-solid-state high-voltage DC circuit breaker topology. Background technique [0002] Multi-terminal direct current transmission technology can realize multi-source power supply and multi-drop power receiving, which is a flexible, fast and economical power transmission method. In particular, the emergence of flexible DC transmission technology based on voltage source converters has made it possible to build and develop multi-terminal high-voltage DC grids. DC circuit breakers with the functions of quickly breaking DC fault currents and isolating faults are essential for the realization of multi-terminal high-voltage DC grids. Less and vital core equipment. [0003] After a short-circuit fault occurs in the DC system, the short-circuit current rises very quickly, requiring the high-voltage DC circuit breaker to be able to quickly break and isolate the high-volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26
Inventor 苟锐锋封磊张万荣杨晓平孙小平张艳梅马志荣赵超伟江戈雒雯霞冯瑞
Owner CHINA XD ELECTRIC CO LTD
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