Natural commutation type hybrid DC circuit breaker and current turn-off method of DC system

A DC circuit breaker and natural commutation technology, which is applied in the direction of emergency protection circuit devices, electrical components, circuit devices, etc. for limiting overcurrent/overvoltage, and can solve the problem of current parameter differentiation, reliability and controllability. Unsatisfactory performance, high cost, etc., to achieve the effect of small footprint, low cost, and low loss

Pending Publication Date: 2020-07-10
TSINGHUA UNIV
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  • Abstract
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Problems solved by technology

[0007] However, the above-mentioned forced-commutation hybrid DC circuit breakers still have problems such as large size, high cost, need to be equippe

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  • Natural commutation type hybrid DC circuit breaker and current turn-off method of DC system
  • Natural commutation type hybrid DC circuit breaker and current turn-off method of DC system
  • Natural commutation type hybrid DC circuit breaker and current turn-off method of DC system

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[0036] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0037] figure 2 Shown is the topology of the natural commutation hybrid DC circuit breaker of the present invention. by figure 2 It can be seen that the natural commutation type hybrid DC circuit breaker of the present invention includes a main flow branch, a transfer branch and an energy absorption branch, and the main flow branch, ...

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Abstract

The invention provides a natural commutation type hybrid DC circuit breaker and a current turn-off method of a DC system, the natural commutation type hybrid DC circuit breaker is composed of a main through-flow branch, a transfer branch and an energy absorption branch, and the main through-flow branch, the transfer branch and the energy absorption branch are connected in parallel; and the main through-flow branch is formed by connecting a vacuum gap rapid mechanical switch and a gas gap rapid mechanical switch in series. The natural commutation type hybrid DC circuit breaker has the characteristics of near zero on-state loss, reclosing and current differentiation support, reliable commutation, high controllability, compact size, small occupied area, low cost and the like.

Description

technical field [0001] The invention belongs to the field of a DC circuit breaker, one of the key equipment of a DC power grid, and in particular relates to a natural commutation type hybrid DC circuit breaker and a current shut-off method for a DC system. Background technique [0002] With the continuous development of distributed energy sources and the increase of types of electric loads, DC power grids have shown obvious advantages in terms of large-capacity power transmission, access to distributed energy sources, and provision of reactive power compensation for AC systems. [0003] Due to the complex and diverse main wiring structure and operation mode of the flexible DC power grid, the DC system has multiple fault modes, rapid fault development, and wide-ranging impact. Therefore, there is an urgent need for the fault isolation technology of the flexible DC grid to ensure the safe and reliable operation of the flexible DC grid. DC circuit breakers are the most ideal c...

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Application Information

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IPC IPC(8): H02H7/26H02H9/00
CPCH02H7/268H02H9/00
Inventor 余占清曾嵘黄瑜珑屈鲁周雁南陈政宇甘之正
Owner TSINGHUA UNIV
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