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A device for action of transformer neutral point protection gap

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, improving operation reliability, and stabilizing discharge voltage

Active Publication Date: 2016-06-08
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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  • A device for action of transformer neutral point protection gap
  • A device for action of transformer neutral point protection gap
  • A device for action of transformer neutral point protection gap

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Experimental program
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Embodiment Construction

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

[0025] 1 denotes the I-beam base; 2.3.4 denotes the first base, the second base, and the third base; 5.6 denotes the first post insulator and the second post insulator; 7 denotes the adjustable post; 8 denotes the height-adjustable support 9 represents the support for fixing the metal plate; 10 and 11 represent the first horn electrode and the second horn electrode respectively; 12 represents the metal plate; 13 represents the base of the arrester, 14 represents the main body of the arrester, 15 represents the grounding wire of the arrester; Claw combination gap ground wire.

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

[0027] The device for...

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PUM

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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 for gap operation of transformer neutral point protection. Background technique [0002] At present, the 110kV ~ 500kV system usually adopts an effective grounding method. In order to limit the single-phase grounding short-circuit current, prevent communication interference and relay protection setting configuration and other requirements, the actual operating power grid above 110kV generally uses a transformer neutral point to be directly grounded. , the neutral point of the rest of the transformers is grounded through the arrester or the protective gap, or connected to the ground through the arrester and the protective gap in parallel. The division of protective action between 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. Excessive residual pressure. ...

Claims

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Application Information

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Patent Type & Authority Patents(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