电工技术学报  2022, Vol. 37 Issue (zk1): 11-21    DOI: 10.19595/j.cnki.1000-6753.tces.L90341
电工理论 |
电力变压器振动噪声分析及其有源降噪
钟思翀1, 祝丽花2, 王前超1, 张建功3, 王延召3
1.天津工业大学 天津 300387;
2.天津理工大学 天津 300384;
3.电网环境保护国家重点实验室(中国电力科学研究院有限公司武汉分院) 武汉 430000
Electromagnetic Vibration of Power Transformer and Active Noise Reduction
Zhong Sichong1, Zhu Lihua2, Wang Qianchao1, Zhang Jiangong3, Wang Yanzhao3
1. Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy Tiangong University Tianjin 300387 China;
2. Tianjin University of Technology Tianjin 300384 China;
3. Wuhan Branch of China Electric Power Research Institute Co. Ltd State Key Laboratory of Power Grid Environmental Protection Wuhan 430000 China
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摘要 电力变压器运行过程常由于电网波动引起谐波输入,从而对其运行振动噪声产生明显影响。振动噪声的变化将对周边环境、电力变压器使用寿命产生影响。为了模拟电网中存在谐波的情况,需要在工频正弦激励中叠加谐波激励。为了探究电力变压器在谐波激励下的服役磁特性、电磁振动与声场分布,该文改进了磁特性测量装置,开展了不同谐波下铁心硅钢片磁化特性与磁致伸缩特性的测量,并基于测量数据对电力变压器进行电磁振动数值计算分析;考虑铁心磁致伸缩效应,对电力变压器进行谐波激励下磁场、机械场、声场的计算,得到磁场、声场、铁心振动结果,并与工频正弦激励计算结果进行对比分析,总结谐波输入对铁心电磁振动的影响;采用有源降噪分析方法,研究降噪后电力变压器周围声场分布与频率特性,证明有源降噪的可行性。
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钟思翀
祝丽花
王前超
张建功
王延召
关键词 谐波服役磁特性磁致伸缩振动噪声有源降噪    
Abstract:Due to fluctuations in power grid, the operational process of power transformer often exists harmonic input which has a significant impact on its operational vibration and noise. The changes in vibration and noise will have an impact on surrounding environment and the service life of power transformers. In order to simulate the presence of harmonics in the power grid, harmonic excitation needs to be superimposed on the power frequency sinusoidal excitation. This paper improves the magnetic characteristic measurement device, and carries out the measurement of the magnetization and magnetostrictive characteristics of the silicon steel sheet core under different harmonics to explore the magnetic characteristics, electromagnetic vibration and sound field distribution of power transformers under harmonic excitation. Based on the measurement data, the electromagnetic vibration of the power transformer is analyzed and calculated; The magnetic, mechanical, and sound field of the power transformer under harmonic excitation are calculated, and the vibration results are obtained considering the magnetostrictive effect of the core. The calculation results are compared and analyzed with normal condition to summarize the impact of harmonic input on the electromagnetic vibration of the core; Active noise reduction analysis method is used to study the sound field distribution and frequency characteristics around the transformer to prove the feasibility of active noise reduction.
Key wordsHarmonics    working magnetic characteristics    magnetostriction    vibration and noise    active noise reduction   
收稿日期: 2020-07-09     
PACS: TM41  
基金资助:国家自然科学基金重大资助项目(51690181)
通讯作者: 祝丽花 女,1984年生,教授,硕士生导师,研究方向为电工装备的减振降噪技术。E-mail:zhulihua@email.tjut.edu.cn   
作者简介: 钟思翀 男,1996年生,硕士研究生,研究方向为电力变压器振动噪声特性分析与有源降噪。E-mail:13821268270@163.com
引用本文:   
钟思翀, 祝丽花, 王前超, 张建功, 王延召. 电力变压器振动噪声分析及其有源降噪[J]. 电工技术学报, 2022, 37(zk1): 11-21. Zhong Sichong, Zhu Lihua, Wang Qianchao, Zhang Jiangong, Wang Yanzhao. Electromagnetic Vibration of Power Transformer and Active Noise Reduction. Transactions of China Electrotechnical Society, 2022, 37(zk1): 11-21.
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