主变室外部声场分布主要影响因素对比研究——以220kV户内变电站为例*

为了解决城市户内变电站噪声对环境的影响问题,研究户内变电站主变室外噪声分布状况,该文采用RAYNOISE软件对220 k V户内变电站不同类型的门窗和进风口进行模拟分析,主变室内放置1台主变压器。模拟结果显示,是否设置隔声门对室外声场的影响不大,而消声百叶对室外声场的影响较大,比普通百叶的降噪效果高3～4 d B;同时设置隔声门和消声百叶的降噪效果比普通百叶和金属门高5～6 d B。该文通过一系列的模拟计算,推导出了户内变电站主变室外部三维空间的噪声预测模型,以期为变电站的噪声控制和改造工程提供科学指导和技术支持。

A comparative study on main influencing factors of outdoor sound field distribution of transformer chamber -- A case study of 220kV indoor substation

In order to solve the negative impact of indoor substation noise on the surroundings and investigate the outdoor noise distribution of the transformer chamber in the indoor substation, RAYNOISE software was used in this paper to simulate and analyze different types of doors, windows and inlets in 220kV indoor substation, considering 1 main transformer in the transformer chamber. The simulation results have shown that the setting of acoustic doors has little effect on the outdoor sound field, but the effect of acoustic louver on the outdoor sound field is 3 - 4 dB higher than that of the normal louver. If both the door and louver are soundproofed, the noise reduction is 5 - 6dB higher than the setting of normal door and louver. Through a series of simulations, this paper has developed the noise prediction models for the outdoor three-dimensional space of indoor substation, and scientific guidance and technical support have been provided for the noise control and retrofit engineering solutions of substation.