关键词: 地下变电站, 结构振动与噪声, 时域特性, 频谱特性

Abstract:

Taking 220 kV Chaoyangmen underground substation and its coupled architectures as the test object, the vibration and noise signals of testing points were acquired which were located on the concrete floor, wall, foundation and transformer tank in the transformer room and each stories of overground and underground. The time domain analysis and frequency spectrum analysis for the test data were carried out. The results show that: firstly, the vibration amplitude of transformer tank wall is large, the vibration spectra of transformer tank are mainly 100 Hz and resonant frequency, and the vibration spectra of the concrete foundation, floor and wall in the transformer room are very similar； secondly, during the design of the underground or indoor substation, structure vibration and noise must be considered which can spread to the whole underground substation and building structure； thirdly, the attenuation of vibration, noise and low spectrum characteristics are not obvious with the increase of distance or the rise of floors.

Key words: underground substation, structure vibration and noise, time domain characteristics, spectrum characteristics