变压器声音信号抗环境噪声干扰技术研究
摘要
本文针对电力变压器在运行过程中产生的噪声问题进行了深入研究，旨在探索变压器噪声的产生机理及其影响因素，并提出相应的抗干扰技术。考虑到变压器噪声的复杂性，研究从内部结构和外部因素两个维度进行分析。内部结构因素包括铁心尺寸、材质、磁通密度、安装工艺和绕组的松紧程度等，而外部因素则涉及负载和环境条件。随着电力需求的增长和环保意识的提高，市场对变压器的工作效率和噪声控制提出了更高要求。
特别地，本文聚焦于干式变压器和油浸式电力变压器的噪声特性。干式变压器虽然具有抗短路能力强、空载损耗低等优点，但由于缺乏油箱，其噪声问题尤为突出。相比之下，油浸式变压器的噪声部分被变压器油吸收，但其振动仍会引起油箱壁的振动，进而产生噪声。研究表明，变压器噪声的根本来源是硅钢片的磁致伸缩效应引起的铁心振动和漏磁场引起的绕组振动。因此，本文重点研究了硅钢片在电磁场中的形变对铁心振动的影响，并探讨了减少噪声的潜在技术。
通过本研究，我们不仅增进了对电力变压器噪声产生机制的理解，而且为降低变压器噪声提供了理论依据和技术支持，对于提升变压器的市场竞争力和满足环保要求具有重要意义。
关键词：变压器噪声；电磁场；硅钢片形变；铁心振动；绕组振动
Abstract
This paper deeply studies the noise problem of power transformer in the operation process, aims to explore the production mechanism of transformer noise and its influencing factors, and puts forward the corresponding anti-interference technology. Considering the complexity of transformer noise, the study is analyzed from two dimensions: internal structure and external factors. Internal structural factors include core size, material, flux density, installation process and winding tightness, while external factors involve load and environmental conditions. With the growth of power demand and the improvement of environmental awareness, the market has put forward higher requirements for transformer work efficiency and noise control.
In particular, this paper focuses on the noise characteristics of dry transformers and oil-immersed power transformers. Although the dry-type transformer has the advantages of strong short circuit resistance and low no-load loss, the noise problem is particularly prominent due to the lack of fuel tank. In contrast, the noise part of the oil-immersed transformer is partially absorbed by the transformer oil, but its vibration will still cause the vibration of the oil tank wall, and then produce noise. The study shows that the fundamental source of transformer noise is the core vibration caused by the magnetostrictive effect of silicon steel sheet and the winding vibration caused by the leakage magnetic field. Therefore, this paper focuses on the influence of the deformation in the electromagnetic field and explores the potential techniques for the noise reduction.
Through this study, we not only improve the understanding of the noise generation mechanism of power transformer, but also provide the theoretical basis and technical support for reducing the noise of transformer, which is of great significance to improve the market competitiveness of transformer and meet the environmental protection requirements.
Key words: transformer noise; electromagnetic field; silicon steel sheet deformation; core vibration; winding vibration
目录
变压器声音信号抗环境噪声干扰技术研究
摘要
Abstract
第一章 绪论
1.1课题研究的背景与意义
1.2国内外研究现状
1.3本文的主要研究内容
第二章 变压器噪声
2.1 变压器噪声的产生机理
2.1.1 铁心噪声
2.1.2 绕组噪声
2.1.3 冷却噪声
2.2 变压器噪声的特点
(1)运行状态。
(2)容量结构。
(3)材料工艺。
2.3本章小结
第三章 磁致伸缩效应及其数学模型
3.1 硅钢片的磁致伸缩效应
3.1.1 宏观现象
3.1.2 微观机理
3.1.3影响硅钢片磁致伸缩的因素
3.2 磁致伸缩数学模型的建立
3.3 硅钢片状态对噪声的影响
3.4 本章小结
第四章 硅钢片磁致伸缩特性的测量及分析
4.1 硅钢片磁致伸缩的测量
4.2 磁通密度为0.9T结果分析
4.3 磁通密度为1.4T结果分析
4.4 不同磁通密度下对比结果分析
4.5 不同磁通密度对变压器噪声影响
第五章 总结与展望
致 谢
参考文献
