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Method for calculating natural convection cooling characteristic coefficient of obliquely-mounted transformer bushing

A transformer bushing and natural convection technology, which is applied in the direction of physical/chemical change thermometers, instruments, thermometers, etc., to reduce the consumption of manpower and material resources and achieve the effect of cooling performance

Pending Publication Date: 2022-04-08
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For obliquely installed bushings, there are significant differences in the air heating conditions on the ground side and the back side, so the natural convective heat transfer intensity of the two needs to be considered separately to be objective enoug

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  • Method for calculating natural convection cooling characteristic coefficient of obliquely-mounted transformer bushing
  • Method for calculating natural convection cooling characteristic coefficient of obliquely-mounted transformer bushing
  • Method for calculating natural convection cooling characteristic coefficient of obliquely-mounted transformer bushing

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[0024] The present invention will be further described below with reference to the accompanying drawings and specific implementation processes. It should be emphasized that the specific implementation examples described herein are only used to explain the present invention, and do not limit the scope of the inventive concept and its claims.

[0025] The first step is to establish a comprehensive test platform for natural convection cooling characteristics of inclined-mounted transformer bushings

[0026] The comprehensive test platform for natural convection cooling characteristics of inclined-mounted transformer bushing includes: transformer bushing body (1), bushing umbrella skirt (2), upper terminal of bushing guide rod (3), lower terminal of bushing guide rod ( 4), casing flange (5), flange fixing bolts (6), adjustable angle test bench (7), temperature sensor array on the back side of casing shed (8), temperature sensor on the ground side of casing shed an array (9), an a...

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Abstract

The invention discloses a method for calculating a natural convection cooling characteristic coefficient of an inclined transformer bushing. Comprising the following steps: establishing a comprehensive test platform for the natural convection cooling characteristics of the obliquely-mounted transformer bushing, obtaining a natural cooling coefficient when the bushing is vertical to the ground, obtaining natural cooling coefficients of the bushing at different obliquely-mounted angles, obtaining natural convection cooling characteristic coefficients of the obliquely-mounted transformer bushing, and obtaining the comprehensive test platform for the natural convection cooling characteristics of the obliquely-mounted transformer bushing. And evaluating the natural convection cooling performance of the obliquely-mounted transformer bushing. The method has the advantages that the method for evaluating the overall heat dissipation characteristics of the sleeve comprehensively considering the natural convection cooling characteristics of the obliquely-installed sleeve at different inclination angles is proposed for the first time, and the thermal performance of the obliquely-installed sleeve of the power transformer during operation can be scientifically and reasonably simulated and judged.

Description

technical field [0001] The invention relates to the field of electrical insulation on-line detection and fault diagnosis, in particular to a method for calculating the natural convection cooling characteristic coefficient of an obliquely mounted transformer bushing. Background technique [0002] The bushing is one of the most critical components of a power transformer. It is not only responsible for supporting the outgoing wire of the winding to pass through the transformer box and connecting to the external power grid, but also plays a role in ensuring the insulation between the outgoing wire and the transformer body. Its safety is essential for power systems. stability is crucial. Cooling performance is one of the important technical indicators of the bushing, because when the transformer is running, the center conductor of the bushing will generate heat under the Joule effect of the current, which will cause the temperature of each part of the bushing to rise to varying d...

Claims

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Application Information

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IPC IPC(8): G01N25/20G01K11/32G01R27/02
Inventor 袁帅周利军陈家伟
Owner SOUTHWEST JIAOTONG UNIV
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