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 unevenness, overheating temperature and overheating of converter transformers, and achieve the effects of improving oil flow speed, small flow resistance loss and uniform flow field distribution.

Active Publication Date: 2020-09-25
XI AN JIAOTONG UNIV +2
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  • Summary
  • Abstract
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  • Claims
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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 non-uniformity of a converter transformer. By adopting a hollow box body, an oil guide structure, small holes and other structures, the internal flow field distribution of the converter transformer is more uniform, the convection heat exchange efficiency of transformer oil is improved, and the heat and mass transfer between the transformer oil is enhanced, so that the non-uniformity of the internal temperature distribution of the converter transformer is improved. Local enhanced heat exchange is carried out on a local overheating position by adopting a directional nozzle structure, so that the local overheating phenomenon of the converter transformer is improved.

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...

Claims

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Application Information

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Patent Type & Authority Applications(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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