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SF6 rapid circuit breaker

A fast breaking and speed technology, applied in the direction of high-voltage air circuit breakers, circuits, high-voltage/high-current switches, etc., can solve the problems of power system transient stability characteristics deterioration, long fault removal time, and low transient stability limit

Active Publication Date: 2020-10-30
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of implementing the present invention, the inventors have found that the prior art has at least the following problems: the fault removal time of the current specified transmission line is relatively long, which accelerates the deterioration of the transient stability characteristics of the power system during the fault and restoration process, and is the cause of temporary A key reason for the low state stability limit, the transmission capacity of AC transmission lines is greatly limited

Method used

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0023] A kind of SF provided by the embodiment of the present invention 6 Fast circuit breaker, suitable for 550kV high voltage AC transmission line, see figure 1 , is a kind of SF provided by Embodiment 1 of the present invention 6 Schematic diagram of the local structure of the fast circuit breaker. The SF 6 The fast circuit breaker includes a moving contact, a static contact and an operating mechanism; the operating mechanism is connected to the moving contac...

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Abstract

The invention discloses an SF6 quick circuit breaker which is suitable for a 550kV high-voltage alternating-current transmission line and is characterized in that the SF6 quick circuit breaker comprises a moving contact, a static contact and an operating mechanism, the operating mechanism is connected with the moving contact and is used for driving the moving contact to be separated from the static contact; in the switching-off process of the SF6 rapid circuit breaker, the operating mechanism drives the moving contact to move at a preset switching-off speed, so that the pre-compression time ofthe SF6 rapid circuit breaker is less than 8.8 ms; and the short arcing time of the SF6 quick circuit breaker is less than 9.3 ms. The embodiment of the invention is adopted, according to the invention, the pre-compression time and arcing time in the opening process can be effectively reduced, and the full-on-off time is effectively reduced, thereby reducing the fault removal time of a power system, greatly improving the transient stability limit of the power system, and improving the power transmission capability of an AC power transmission line of the power system and the stability of the power system.

Description

technical field [0001] The present invention relates to the field of power system technology, in particular to a SF 6 Quick breaker. Background technique [0002] In the actual operation of the distribution network, the transmission capacity of the AC transmission line is mainly restricted by the thermal stability constraints of the line and the transient stability constraints of the power system. Among them, the transient stability of the power system refers to the ability of each generator to maintain synchronous operation and transition to a new or restore the original stable operating state after the power system is subjected to a large disturbance. At present, there are many cases where the transient stability limit is lower than the thermal stability limit in the 500kV AC transmission lines within the distribution network. At the same time, a fault in the power system can easily lead to transient instability of the power grid. For the case where the transient stabil...

Claims

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Application Information

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IPC IPC(8): H01H33/91H01H33/42
CPCH01H33/91H01H33/42
Inventor 刘凯彭在兴王颂张杰赵林杰李锐海
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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