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Power transformer and method for positioning internal fault of power transformer

A technology of power transformers and transformers, applied in the direction of measuring electrical variables, instruments, measuring electricity, etc., can solve the problem of inaccurate positioning of transformers, and achieve the effect of accurate fault points and accurate positioning

Pending Publication Date: 2022-06-03
PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unable to accurately locate the fault point in the transformer

Method used

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  • Power transformer and method for positioning internal fault of power transformer
  • Power transformer and method for positioning internal fault of power transformer

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be further described below in conjunction with some specific embodiments.

[0023] like figure 1 and figure 2 As shown, a power transformer includes a transformer body 1 and an on-load switch control box 2 connected to the transformer body 1; insulating oil is arranged inside the transformer body 1; the on-load switch control box 2 is located in the On one side of the transformer body 1, on the other side of the transformer body 1, a plurality of oil sample sampling valves with different heights are uniformly arranged in the vertical direction, and the oil sample sampling valves communicate with the insulating oil; the transformer body There are three sets of terminals on the top of 1, including high-voltage side outgoing lines, medium-voltage side outgoing lines and low-voltage side outgoing lines.

[0024] After the transformer fails, due to the phenomenon of winding temperature rise and arc discharge, the transformer oil will decompose o...

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Abstract

The invention discloses a power transformer which comprises a transformer body and an on-load switch control box connected with the transformer body. Insulating oil is arranged in the transformer body; the on-load switch control box is located on one side of the transformer body, a plurality of oil sample sampling valves with different heights are uniformly arranged on the other side of the transformer body in the vertical direction, and the oil sample sampling valves are communicated with the insulating oil; and three groups of terminals are arranged at the top of the transformer body and comprise a high-voltage side wire outlet terminal, a medium-voltage side wire outlet terminal and a low-voltage side wire outlet terminal. Different heights and positions of insulating oil in the transformer can be conveniently sampled and detected, and fault points in the transformer can be accurately positioned.

Description

technical field [0001] The invention relates to the technical field of transformer fault diagnosis, in particular to a power transformer and a method for locating an internal fault of the power transformer. Background technique [0002] When a short-circuit fault occurs in a power system, its instantaneous short-circuit current may reach several times or even dozens of times that during normal operation. A large short-circuit current flowing through the transformer winding will produce a strong thermal effect, resulting in damage to the inter-turn insulation of the transformer winding, a decrease in the insulation strength, and resulting in insulation breakdown and arc discharge; the short-circuit current flowing through the winding will also generate a huge Electric power, extrusion, pulling windings, deformation of transformer windings, severe cases can make the whole transformer scrapped. Most of the transformer windings are enclosed in the shell and filled with transfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R31/12
CPCG01R31/00G01R31/12Y04S10/52
Inventor 张照真裴继东张大庆赵剑波赵炜兰宁远木坤明杨鑫楠杨延举任君鹏李秋思杨晓明刘力源
Owner PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN