换流变电站可听噪声频谱分析与控制技术

换流变电站可听噪声对作业人员职业健康具有一定的影响。为了将作业人员职业接触噪声控制在可接受的水平，对国内不同电压等级换流变电站内换流变压器、换流阀厅、平波电抗器、交流滤波器等作业人员职业接触噪声进行了现场测量与频谱分析。结果表明，换流变电站噪声能量主要集中在中低频，50 Hz偶数倍频上线谱声压级突出，频率集中在100～1 000 Hz频率范围内，除阀厅在高频部位能量仍然较高外，其他作业场所噪声在频率高于5 kHz后，声压级几乎下降至50 dB以下。基于此特点，从声源控制、隔声控制与人员防护3个方面提出了噪声控制措施。

Analysis of Audible Noise Caused by Equipments in Domestic Converter Station and Its Control Measures

The audible noise produced by converter stations has influences on occupational health of working personnel. The occupational exposing noise of converter transformer, converter valve, smoothing reactor, AC filter group in domestic different voltage converter stations is measured and analyzed, for controlling the occupational exposing noise in an acceptable level. The frequency spectrum analyzsis reveals that, the noise energy of converter stations is mainly concentrated within middle/low frequency; the sound pressure is obvious in even doubling frequency of 50 Hz, and the highest peak locates at 100 Hz～1 000 Hz. When the frequency is larger than 5 kHz, the sound energy of converter transformer, smoothing reactor and the AC filter groups decreases under 50 dB, excepting the noise of the converter valve still higher in high frequency. Based on these characteristics, this paper suggests three noise control measures in sound source control, transmission control and personal protection, which has great importance for the noise protection of converter stations.