Multi-physics modelling approach for investigation of moisture dynamics in power transformers

被引：18

作者：

Cui, Yi ^{[1
]}

Ma, Hui ^{[1
]}

Saha, Tapan ^{[1
]}

Ekanayake, Chandima ^{[1
]}

Wu, Guangning ^{[2
]}

机构：

[1] Univ Queensland, Sch Informat Technol & Elect Engn, Brisbane, Qld 4072, Australia

[2] Southwest Jiaotong Univ, Sch Elect Engn, Chengdu 610031, Peoples R China

来源：

IET GENERATION TRANSMISSION & DISTRIBUTION | 2016年 / 10卷 / 08期

基金：

澳大利亚研究理事会;

关键词：

DIFFUSION-COEFFICIENT; PAPER; PRESSBOARD;

D O I：

10.1049/iet-gtd.2015.1459

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The presence of moisture in a power transformer is harmful to its oil-cellulose system and can also accelerate the ageing. Therefore, it is necessary to estimate the moisture content inside the transformer. Due to the variation of loading conditions and ambient temperatures, moisture is neither in a static state nor uniformly distributed in transformers. Moisture migrates between oil and cellulose and moves inside oil and cellulose of transformers. Moreover, given the complexity of a transformer's structure, moisture distribution is also a function of mass and dimensions of transformer's oil-cellulose system. This study adopts a multi-physics modelling approach to investigate moisture dynamics in transformers. In this approach, moisture dynamics is investigated by coupling electromagnetic, thermal, fluid flow and moisture migration physics simultaneously. An accurate estimation on moisture distribution in transformers can then be obtained. Extensive ageing and moisture diffusion experiments have been conducted on a prototype transformer to verify the proposed approach.

引用

页码：1993 / 2001

页数：9

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