Influence of harmonic on loss and temperature rise of mine-used dry-type transformer
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摘要: 为了更准确地分析谐波对变压器损耗和温升的影响，首先建立了干式变压器二维结构模型，并对干式变压器的漏磁场与谐波损耗进行了仿真计算，得到干式变压器轴向和径向漏磁场分布规律及谐波损耗与谐波次数、谐波含有率、谐波电流畸变率的关系；然后利用Fluent对干式变压器二维温度场与流体场进行了流固耦合分析，得到干式变压器温升与谐波次数及谐波电流畸变率的关系。仿真结果表明，干式变压器的谐波铜损耗与谐波电流含有率的平方成正比，且当谐波电流含有率一定时，近似与谐波电流次数的平方成正比；而谐波铁损耗与谐波电压含有率的平方成正比，但当谐波电压含有率一定时，谐波铁损耗随谐波次数的增大而减小，并逐渐趋于平缓。Abstract: In order to accurately analyze influence of harmonic on loss and temperature rise of transformer, a two-dimensional model of dry-type transformer was established firstly, and leakage magnetic field and harmonic loss in the dry-type transformer were simulated. Consequently, distributions of axial and longitudinal leakage magnetic in the transformer, as well as relationship between harmonic loss and harmonic order, harmonic ratio and distortion factor of harmonic current were derived. Then fluid-structure interaction analysis of the two-dimensional temperature field and airflow field of the dry-type transformer was conducted using finite element software Fluent, and the relationships between the temperature rise and harmonic order, as well as distortion factor of harmonic current were gained. Simulation results show that the harmonic copper loss is proportional to square of harmonic current ratio, and it is also approximately proportional to square of harmonic order when the content of harmonic current ratio is certain; the harmonic iron loss is proportional to square of harmonic voltage ratio, but it decreases and gradually tends to flatten out with harmonic order increases when the harmonic voltage ratio is certain.
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Keywords:
- dry-type transformer /
- harmonic /
- loss /
- temperature rise /
- leakage magnetic field /
- temperature field
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期刊类型引用(1)
1. 刘慧. 煤矿液压支架顶梁结构优化设计. 凿岩机械气动工具. 2025(01): 25-27 . 
百度学术
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