Research on Noise Characteristics and Control Schemes for 750kV High Voltage Substation

The operating electrical devices, such as reactors and transformers, especially in ultrahigh voltage level of substations, are constantly emitting noise, which inevitably brings negative effect on the ambient environment and people. With an increasing number of high voltage substations are under construction, noise emission issues are grabbing the public attention in recent years. 750 kV substation, a very typical high voltage level of substation, is taken as the research object in this paper. The transformer, reactor and the corona noise of lines and metal fittings, as the main noise sources in substation, are measured and analyzed respectively. Sound signal processing array technique is adopted and applied to help positioning the corona noise and the noise characteristic is accordingly obtained by beam forming algorithm. On basis of the collected noise source data, the acoustic field model of the whole 750 kV substation could be established in SoundPLAN software and the noise distribution are predicted. To improve the sound environment quality around the substation, different noise control schemes are put forward and the effect of these approaches are verified and compared through the simulation in SoundPLAN. Several good suggestions are given and it could be very helpful for the early stages of planning and designing of substations in order to reduce the potential noise problems.