特高压交流GIS变电站噪声特性测量与分析

Measurement and Analysis on Characteristics of Audible-noise in UHVAC GIS Substations

为了掌握特高压交流GIS变电站的噪声特性,以1 000 kV特高压芜湖变电站为研究对象,对站内主变压器、高压并联电抗器以及站界噪声声压级进行了测量,分析了站内主要噪声源的频谱分布、噪声水平以及噪声传播与衰减特性。结果表明,主变压器噪声与高压并联电抗器噪声较为接近且以中低频为主,均在70 dB(A)左右。冷却风扇噪声对主变压器噪声影响较大。主变压器与高压并联电抗器噪声传播过程中均存在较为明显的干涉现象,其中以100、200 Hz噪声干涉最为显著。站界噪声受站内声源位置的影响较大,距离噪声源越近,站界噪声越明显。分析结果对于典型特高压交流变电站噪声预测及评价具有实际意义。

To understand the characteristics of audible noise in UHV GIS substations, the sound pressure level （SPL） of the main transformers, HV reactors and boundary of the substation were measured in Wuhu 1 000 kV substation. The spectrum distribution, SPL and noise attenuation characteristics were analyzed. The results show that： （1）The main transformers and the HV reactors have nearly identical SPL around 70 dB（A）; （2）The medium-and low-frequency noises are the main components of the spectrum; （3）The cooling fun has significant effect on the transformer noise; （4）Interference phenomenon occurs in the noise transmission processes of the transformers and reactors, in which the noises at 100 Hz and 200 Hz exhibit the most obvious interference ; （5） The SPL at boundary is largely influenced by the layout of the noise sources in the substation, the closer the distance between the boundary and the noise source, the more obvious the noise at the boundary of the substation. The obtained results are of significance to noise prediction and assessment of UHV AC substations.