Neutral point vacuum gap grounding complete equipment for 110kV transformer

A transformer neutral point, complete set of equipment technology, applied in the direction of transformer/inductor coil/winding/connection, emergency protection circuit device for limiting overcurrent/overvoltage, electrical component structure association, etc., can solve the transformer neutrality Point grounding is not reliable enough to achieve the effect of high breakdown voltage accuracy, small discreteness and small installation space

Pending Publication Date: 2021-07-02
HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is: the technical problem that the current transformer neutral point grounding is not reliable enough

Method used

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  • Neutral point vacuum gap grounding complete equipment for 110kV transformer
  • Neutral point vacuum gap grounding complete equipment for 110kV transformer
  • Neutral point vacuum gap grounding complete equipment for 110kV transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A 110kV transformer neutral point vacuum gap grounding complete set of equipment, such as figure 2 As shown, it includes a machine base 43, an isolating switch, a lightning arrester 33, a vacuum gap grounding module, a common grounding copper bar 41, a grounding terminal 42, a conductive copper bar 32, a first current transformer 40 and a second current transformer 44, and the isolating switch , lightning arrester 33 and vacuum gap grounding module are all installed on the support 43, the first ends of isolating switch, lightning arrester 33 and vacuum gap grounding module are all connected with conductive copper bar 32, transformer neutral point is connected with conductive copper bar 32, isolated The switch, the lightning arrester 33 and the second end of the vacuum gap grounding module are all connected to the common grounding copper bar 41, the common grounding copper bar 41 is connected to the grounding terminal 42, the grounding terminal 42 is grounded through a w...

Embodiment 2

[0036] A 110kV transformer neutral point vacuum gap grounding complete set of equipment, such as image 3 , Figure 4 As shown, the electric opening and closing mechanism 21 includes a friction rod 211, a friction disc 212, a locking block 213, a locking spring 214, a locking current source 215, a driving current source 216 and a driving spring 217. The friction disc 212 and the insulating screw 24 Concentric fixed connection, the friction rod 211 is in contact with the side of the friction disc 212, the locking block 213 is in contact with the side of the friction disc 212, one end of the driving spring 217 is connected with the friction rod 211, and the other end of the driving spring 217 is connected with the isolation switch installation base 22, Both ends of the driving spring 217 are connected to the driving current source 216, one end of the locking spring 214 of the driving current source 216 is connected to the installation base 22 of the isolating switch, the other e...

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Abstract

The invention relates to electric power auxiliary equipment, in particular to neutral point vacuum gap grounding complete equipment for a 110kV transformer, and the equipment comprises a machine base, an isolating switch, a lightning arrester, a vacuum gap grounding module, a common grounding copper bar, a grounding terminal, a conductive copper bar, a first current transformer and a second current transformer. The isolation switch, the lightning arrester and the vacuum gap grounding module are connected with the conductive copper bar, the transformer neutral point is connected with the conductive copper bar, the isolation switch, the lightning arrester and the vacuum gap grounding module are connected with the common grounding copper bar, the common grounding copper bar is connected with the grounding terminal, the grounding terminal is grounded, and the first current transformer is coupled with the vacuum gap grounding module; and the second current transformer is coupled with the common grounding copper bar. The invention has the substantive effects of overcoming the influence of climatic environment on gap breakdown precision, improving the accuracy of neutral point overvoltage protection, improving the safety and reliability of neutral point grounding equipment, being free of field alignment and maintenance, and saving the installation space.

Description

technical field [0001] The invention relates to electric power auxiliary equipment, in particular to a 110kV transformer neutral point vacuum gap grounding complete set of equipment. Background technique [0002] The current transformer neutral point grounding equipment in 110kV and 220kV substations adopts the parallel connection of lightning arresters, air gaps and grounding switches. grounding is not required. When the neutral point of the transformer is not directly grounded, the overvoltage of the neutral point of the transformer is protected by air gaps and arresters. The current air gap is installed horizontally by two metal rods, and the two metal rods end to end form the air gap. [0003] figure 1 It is the schematic diagram of the current 110kV transformer neutral point air gap grounding equipment, 10 is the grounding terminal, 11 is the moving contact of the isolating switch, 12 is the operating mechanism of the isolating switch, 13 is the static contact of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F27/40H02H9/08
CPCH01F27/28H02H9/08H01F27/40
Inventor 周禹航翁时乐吴凯高健王璞朱奕弢韦舒天王瑶王炜缪琰徐诚范殷伟陆永卫石宏马向辉谢英男丁瀚冯驰陆云凤金烨
Owner HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD
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