电工技术学报2017，Vol.32Issue(22)：134-143,10.DOI:10.19595/j.cnki.1000-6753.tces.L70587
高压自耦变压器肺叶磁屏蔽特性的数值计算与分析
Numerical Calculation and Analysis of Lobe-Type Magnetic Shielding in High Voltage Auto-Transformer
摘要
Abstract
In this paper, a 334MV?A single-phase auto-transformer with lobe-type magnetic shielding is used as the prototype model, aiming at the design problem of a novel body magnetic shielding lobe-type magnetic shielding. Firstly, the influences of the lobe-type magnetic shielding on structure parts, leakage fields in windings and stray losses are examined using three-dimensional (3-D) non-linear frequency-domain finite element method (FEM). Taken the magnetic densities (loss densities) of tank, yoke clamp, tie plate, tank shielding and lobe-type magnetic shielding as the observation targets, the influences of lobe-type magnetic shielding location and size on the leakage fields of transformer are analyzed by the leakage field analysis and stray losses calculation. The load loss experiment has verified the analysis through comparing the calculation results with the experiments. Finally, three kinds of cooling oil models about lobe-type magnetic shielding are presented, regarding the local overheating problem on lobe-type magnetic shielding itself. The analysis of the lobe-type magnetic shielding characteristics provides important guidance and engineering significance of its own design in transformer.关键词
自耦变压器/肺叶磁屏蔽/有限元法/漏磁场/杂散损耗/油路Key words
Auto-transformer/lobe-type magnetic shielding/finite element method/leakage magnetic field/stray losses/cooling oil分类
信息技术与安全科学引用本文复制引用
李龙女,李岩,刘晓明..高压自耦变压器肺叶磁屏蔽特性的数值计算与分析[J].电工技术学报,2017,32(22):134-143,10.基金项目
国家自然科学基金(51177103)和2017年度博士后创新人才支持计划(BX201700169)资助项目. （51177103）
