750kV超高压变压器噪声的现场测量与分析  

In-situ Noise Measurement and Analysis of 750kV Extra High Voltage Transformers

作　　者：王娟 张钢 蔡勇 蔡萱[2] 田侑成 郭江华[3] 

机构地区：[1]湖北省核与辐射环境监测技术中心,湖北武汉430072 [2]国网湖北省电力公司,湖北武汉430077 [3]武汉大学动力与机械学院,湖北武汉430072

出　　处：《水电与新能源》2017年第8期30-34,共5页Hydropower and New Energy

摘　　要：通过测量凤凰——乌鲁木齐——吐鲁番——哈密750kV输电线路I号和II号超高压变电站三相变压器的倍频程A计权声压级(d B(A))、1/3倍频程频谱特性,得到了正常运行条件下变压器近场噪声的测量结果。测量I号和II号超高压变电站三相变压器噪声随距离衰减特性,得到正常运行条件下变压器远场噪声的测量结果。结果表明,750kV超高压变压器整体噪声以100~5000 Hz的中低频为主,不同测点的A计权声压级(d B(A))受冷却风扇影响较大;此外,750kV超高压变压器整体噪声随着与变压器基准面的距离增大而减小,衰减较平缓且三相衰减情况基本一致。The near-field noise under normal operation condition of the three phase transformers in the No. 1 and No. 2 extra high voltage （EHV） substations in the Fenghuang-Urumqi-Hami 750 kV transmission line is measured, including the octave A-weighted sound pressure level （dB （A）） and the one-third octave noise spectrum. Also, the far-field noise level is obtained by measuring the attenuation characteristics with distance. The results show that the near-field noise of the 750 kV EHV transformers is mainly of low and medium frequencies between 100 Hz and 5000 Hz. The octave A- weighted sound pressure levels are obviously affected by the cooling fans. While the overall noise level decreases slowly with the increasing distance in each phase.

关 键 词：750 KV 超高压变压器 噪声频谱 现场测量 

分 类 号：X827[环境科学与工程—环境工程]