Device and method for improving local overheating phenomenon and temperature non-uniformity of converter transformer

A converter transformer and local overheating technology, applied in the field of power transformers, can solve the problems of overheating temperature, overheating and unevenness of converter transformers

Active Publication Date: 2021-05-04
XI AN JIAOTONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to overcome the above-mentioned problems in the prior art, the object of the present invention is to provide a device for improving the local overheating phenomenon and temperature inhomogeneity of the converter transformer, so as to improve the local overheating phenomenon of the converter transformer

Method used

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  • Device and method for improving local overheating phenomenon and temperature non-uniformity of converter transformer
  • Device and method for improving local overheating phenomenon and temperature non-uniformity of converter transformer
  • Device and method for improving local overheating phenomenon and temperature non-uniformity of converter transformer

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in detail:

[0035] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, a device for improving the local overheating phenomenon and temperature inhomogeneity of the converter transformer is characterized in that it includes a hollow box 1 of the converter transformer, and guides are installed at each oil inlet 3 of the hollow box 1. The oil structure 2, the inner wall surface of the hollow box 1 perpendicular to the ground direction is provided with small holes 6 at multiple positions parallel to the ground direction, some of the small holes 6 are used to install orientations extending to the vicinity of the local overheating position of the converter transformer Nozzle structure 7; the oil guide structure 2 includes an axial outlet 4 and a radial outlet 5, and one end of the axial outlet 4 located in the hollow box 1 communicates with the flange 10, an...

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Abstract

The invention discloses a device and method for improving the local overheating phenomenon and temperature inhomogeneity of a converter transformer. By adopting structures such as a hollow box, an oil guide structure, and small holes, the internal flow field of the converter transformer is distributed more uniformly, and the temperature is improved. The convective heat transfer efficiency of transformer oil enhances the heat and mass transfer between transformer oils, thereby improving the inhomogeneity of temperature distribution inside the converter transformer. The local overheating phenomenon of the converter transformer is improved by adopting the directional nozzle structure to locally strengthen the heat exchange at the local overheating position.

Description

technical field [0001] The invention relates to the technical field of power transformers, in particular to a device and method for improving local overheating and temperature inhomogeneity of converter transformers. Background technique [0002] The converter transformer is one of the most important equipment in the high-voltage direct current transmission system, which is determined by its position at the core of alternating current and direct current conversion, as well as its complexity in equipment manufacturing technology and high equipment manufacturing cost. During the operation of the converter transformer, there are characteristic harmonic currents and non-characteristic harmonic currents flowing, and the harmonic components will significantly increase the stray losses in the converter transformer windings, iron core and metal structural parts, resulting in Localized overheating occurs. Excessive temperature will accelerate the aging of insulating materials, reduc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/12H01F27/02
CPCH01F27/025H01F27/12
Inventor 余小玲谭又博汲胜昌臧英代双寅
Owner XI AN JIAOTONG UNIV
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