An improvement method for low-noise structure and sound-absorbing structure of indoor substation

Abstract

The invention relates to an improvement method for low-noise structure and sound-absorbing structure of an indoor substation. Visualization and quantitative analysis are performed on the external sound field of a power transformer through the analysis of the sound radiation characteristics, and the indoor The overall layout and sound-absorbing structure of the substation are improved and optimized to reduce the sound pressure level at the boundaries of noise-sensitive areas. The optimization of the overall layout of the indoor substation includes adjusting the position of the transformer room to keep it away from the noise-sensitive area, reducing the height of the ventilation window and changing the orientation of the ventilation window, etc.; the improvement of the sound-absorbing structure includes increasing the cavity depth of the sound-absorbing structure, Attach a layer of metal film to the inner side of the metal sound-absorbing panel and change the position of some sound-absorbing materials. By comparing the actual measurement with impedance tubes and establishing a 3D multi-physics field coupling model to analyze the sound radiation characteristics, the improved sound-absorbing structure can effectively improve the overall sound-absorbing effect and reduce the sound radiation level of the substation.

Description

technical field [0001] The invention relates to the field of passive noise control, in particular to a passive noise control system for an indoor substation power transformer. Background technique [0002] With the advancement of urbanization and old city revitalization plans, people's pursuit of convenient, orderly and efficient lifestyles has increased the demand for electric energy; Adjacent to residential areas. Unlike suburban substations, which have sufficient space to reduce noise from power transformers, urban areas have limited space and stricter environmental noise standards, making indoor substations with a smaller footprint a preferred choice for designers and operators. The currently followed indoor substation design process is "electrical design—civil engineering design—noise level detection—noise reduction design". Different design departments are independent of each other. The noise reduction methods adopted by each department are limited, and the noise redu...

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Problems solved by technology

The currently followed indoor substation design process is "electrical design - civil engineering design - noise level detection - noise reduction design". Different design departments are independent of each other. The noise reduction methods adopted by each department are limited, and the noise reduction methods are regarded as remedial measures. It is not a preventive measure. For example, the civil engineering design department can only modify the civil engineering design part. After the noise level exceeds the standard, the civil engineering design department can only adopt the method of installing a sound insulation wall. However, the reason for the excessive noise may be that the layout design of electrical equipment does not take into account the transformer. The sound radiation characteristics of the substation, such a design process lacks feedback information between various design departments, and cannot find a most cost-effective way to reduce substation noise

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