Device for operation of protective gap of transformer neutral point

A technology of transformer neutral point and protection gap, applied in the field of transformers, can solve problems such as affecting the reliability of power grids, and achieve the effects of improving lightning withstand voltage, stable discharge voltage, and improving operation reliability.

Active Publication Date: 2013-11-27
SHENZHEN POWER SUPPLY BUREAU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in many cases, the gap between the transformer neutral point arrester and the parallel connection does not act as expected, which will affect the reliability of the power grid operation

Method used

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  • Device for operation of protective gap of transformer neutral point
  • Device for operation of protective gap of transformer neutral point
  • Device for operation of protective gap of transformer neutral point

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Embodiment Construction

[0024] Before describing the device for the action of the transformer neutral point protection gap of the present invention, the components indicated by the numbers in the figure are explained as follows:

[0025] 1 stands for I-beam base; 2.3.4 stands for the first base, the second base and the third base; 5.6 stands for the first pillar insulator and the second pillar insulator; 7 stands for an adjustable pillar; 8 stands for a height-adjustable support 9 represents the support for fixing the metal plate; 10 and 11 represent the first claw electrode and the second claw electrode respectively; 12 represents the metal plate; 13 represents the arrester base, 14 represents the arrester body, 15 represents the arrester grounding wire; 16 represents Claw combination clearance ground wire.

[0026] see figure 1 , is a schematic structural diagram of Embodiment 1 of the device for the action of the neutral point protection gap of the transformer according to the present invention. ...

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Abstract

The invention discloses a device for operation of a protective gap of a transformer neutral point. The device comprises a cavel-shaped gap and a metal plate installed in the middle of the cavel-shaped gap, wherein various operation characteristics of the gap can be adjusted through adjustment of the position of the metal plate, the withstand value of lightning over-voltage is improved, and meanwhile the breakdown value of power frequency over-voltage is reduced. The invention further discloses a method for operation of the protective gap of the transformer neutral point. According to the method and device for operation of the protective gap of the transformer neutral point, the probability of lightning arrester explosion due to overlong time of energizing of currents can be reduced, and reliable operation of a power grid is guaranteed.

Description

technical field [0001] The invention relates to the field of transformers, in particular to a device used for the action of a transformer neutral point protection gap. Background technique [0002] At present, the 110kV ~ 500kV system usually adopts the effective grounding method. In order to limit the single-phase grounding short-circuit current, prevent communication interference, and set the requirements of the relay protection, the actual operation of the grid above 110kV generally adopts the neutral point of a transformer to be directly grounded. , the neutral point of the rest of the transformer is grounded through the arrester or the protective gap, or the method of connecting the arrester and the protective gap in parallel. The protection action division of the arrester and the parallel gap is: the power frequency overvoltage is borne by the gap, and the lightning overvoltage operation overvoltage is borne by the arrester. At the same time, the protection gap is used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/04H02H9/06
Inventor 王亚舟严骏宏严玉婷黄炜昭邓世聪陈瑞珍王羽张亚冰卢旭鲁海亮陈潇
Owner SHENZHEN POWER SUPPLY BUREAU
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