Research On Noise Optimization Design Of Indoor Substation

The noise generated in the operation of substations has a serious impact on residents,causing widespread concern.In order to make the power substations reach the noise emission limit of the environmental acoustic function area,the modal and harmonic response analysis of transformers and their noise radiation characteristics was focused on.Based on the sound absorption performance of sound absorbing material,noise optimization design of substation was carried out.The transformer model was firstly estab lished using Ansys Workbench software,then the vibration characteristics of the transformer were obtained by modal analysis and harmonic response analysis,and the radiation characteristics of the transformer were calculated by LMS virtual.lab joint simulation.Secondly,the sound absorption coefficient of acoustic materials was simulated by impedance tube method,and the research on the sound absorption performance of acoustic materials was put forward.The best sound absorption performance was sought for by changing the conditions of sound absorption materials.Finally,according to the indoor substation noise distribution,and environmental acoustic functional area noise emission index,the indoor substation optimization design was finished.Acoustic structure was set in the transformer,sound insulation was carried at windows and doors,and silencing structure was used for vents and air inlets.several kinds of schemes was adopted for transformer noise reduction.The noise reduction results and the transmission of noise radiation after modified was simulated by the LMS virtual.lab and SoundPLAN,and the best optimization scheme was chosen to meet the noise emission standards.