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Switch cabinet arc light protection method and device

A switchgear and arc technology, which is applied in the field of arc protection methods and devices, can solve the problems of low accuracy of arc protection devices, and achieve the effects of reducing protection costs, improving safety, and fast fault judgment.

Inactive Publication Date: 2019-08-27
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] This application provides an arc protection method and device to solve the problem of low accuracy of the arc protection device

Method used

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  • Switch cabinet arc light protection method and device
  • Switch cabinet arc light protection method and device
  • Switch cabinet arc light protection method and device

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Embodiment Construction

[0027] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0028] see figure 1 , which is a schematic flow chart of a switch cabinet arc protection method provided in the embodiment of the present application, as shown in figure 1 As shown, the switchgear arc protection method provided by the embodiment of the present application includes the following steps:

[0029] Step S110: collecting the arc ...

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Abstract

Embodiments of the invention provide a switch cabinet arc light protection method and device. The method comprises the steps that arc light of a switch cabinet is collected through an avalanche photodiode, the arc light is amplified and converted into a voltage signal, and the voltage signal is sent to a signal processing device; the signal processing device is used for judging whether the voltagesignal is larger than an early warning threshold value and a protection threshold value or not separately; if the voltage signal is larger than the early warning threshold value, an early warning signal is sent to a control center; if the voltage signal is larger than the early warning threshold value and the protection threshold value, a tripping signal is sent to a switch of the switch cabinet;and the signal processing device sends an alarm signal to the control center according to the condition that the voltage signal is larger than the early warning threshold value and the protection threshold value. According to the embodiments of the invention, the early warning threshold value and the protection threshold value participate in action logic judgment to serve as the locking conditionfor judging the switch cabinet fault, so that the fault judgment speed is high, the accuracy is high, and the operation safety of the switch cabinet is improved.

Description

technical field [0001] The present application relates to the technical field of steel towers, in particular to an arc protection method and device. Background technique [0002] The partial discharge inside the switchgear poses a serious threat to the safe operation of power equipment. The gradual development of partial discharge will accelerate the deterioration of the insulation level of the equipment, and cause high-energy arcs under extreme conditions. The arc combustion will cause pressure effects, combustion effects, radiation and acoustic effects, which will cause copper bars and heated air to cause air expansion, which will generate huge pressure on the switchgear. It may cause an explosion. The relay protection system adopted by the power sector is linked with the arc monitoring system, which can respond well to extreme arcs, but it is difficult to effectively monitor and achieve early warning of intermittent discharges in the early stage of arc development, and T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/22H02H3/08
CPCH02H3/08H02H7/22
Inventor 彭兆裕王韧岳丹钱国超龚泽威一颜冰马御棠何顺赵亚光
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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