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System having modular mechanical DC breaker

A DC circuit breaker, mechanical technology, applied in the field of systems with modular mechanical DC circuit breakers, can solve the problems of limited voltage level, etc., and achieve the effect of low fracture voltage level, reliable breaking principle and reliable breaking

Inactive Publication Date: 2018-08-07
POWER GRID TECH RES CENT CHINA SOUTHERN POWER GRID +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a system with a modularized mechanical DC circuit breaker, thereby solving the technical problem of limited voltage levels in the existing mechanical DC circuit breaker

Method used

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  • System having modular mechanical DC breaker
  • System having modular mechanical DC breaker
  • System having modular mechanical DC breaker

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0027] Such as figure 1 As shown, a system with a modular mechanical DC circuit breaker includes an energy absorbing branch, a current carrying branch, a commutating branch and a pre-charging branch, and the pre-charging branch is used to feed the commutating branch The precharge capacitor is charged.

[0028] The three branches of the energy-absorbing branch, the current-carrying branch and t...

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Abstract

The invention discloses a system having a modular mechanical DC breaker. The system comprises an energy absorption branch, a current carrying branch and a commutating branch, wherein the energy absorption branch, the current carrying branch and the commutating branch are connected in parallel, the energy absorption branch is used for absorbing residual energy, the current carrying branch is composed of N low voltage modules connected in series, the N is not smaller than 1, the low voltage modules comprise mechanical switches, the current carrying branch is used for controlling closing of the mechanical switches when the system is in normal operation, and the commutating branch is further used for realizing arc blowout opening when the system is in fault. The system is advantaged in that according to different system voltage levels, the low voltage modules in different quantities can be flexibly selected for series connection, the system is easy to expand to the high voltage level, moreover, the opening principle is reliable, and reliable opening of the higher voltage level and the more heavy fault current can be realized.

Description

technical field [0001] The invention belongs to the field of power electronics, and more specifically relates to a system with a modularized mechanical DC circuit breaker. Background technique [0002] In recent years, with the development of flexible DC transmission technology and the advancement of high-power power electronics technology, HVDC transmission has been valued and developed due to its unique advantages. The development of high-voltage DC circuit breakers has become the main bottleneck in the establishment and development of multi-terminal DC power grids. Therefore, more and more attention has been paid to the research of high-voltage DC circuit breakers at home and abroad in recent years. [0003] According to the different key switching devices of high-voltage DC circuit breakers, they can be divided into three categories: mechanical DC circuit breakers, all-solid-state DC circuit breakers, and hybrid DC circuit breakers that combine mechanical switches and so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H3/087
CPCH02H7/268H02H3/087
Inventor 陈名袁召张祖安刘黎明何俊佳陈廷栋
Owner POWER GRID TECH RES CENT CHINA SOUTHERN POWER GRID