特高压变压器噪声源模型及仿真分析
发布时间：2018-08-21 07:58
【摘要】：准确评估特高压变电站内噪声水平需要合适的变压器声学模型。为此,在将变压器看作面声源的基础上,通过点声源与面声源的等效代替,最终将变压器等效为多个点声源,建立了相应的模型。该模型基于等效源法的思想,采用声功率级表示各等效点声源源强,等效过程方便简单,只需测量变压器附近少量场点的声压级,避免了近场声全息技术中的复杂计算。仿真计算结果显示:将面声源等效为多个点声源后的重建声场曲线与原平面声源产生的声场曲线基本一致。另外对1 000 kV变电站的仿真计算与实测数据的对比分析表明:结合提出的声学模型与点声源户外传播衰减,能较准确地预测变电站内任意点处噪声值,误差不超过1.5 dB。
[Abstract]:An appropriate transformer acoustic model is needed to accurately evaluate the noise level in UHV substations. Therefore, the transformer is regarded as a surface sound source, and the corresponding model is established by replacing the point sound source with the surface sound source. Finally, the transformer is equivalent to a number of point sound sources. Based on the idea of equivalent source method, the sound power level is used to express the sound source strength of each equivalent point, and the equivalent process is convenient and simple. It only needs to measure the sound pressure level of a small number of field points near the transformer, thus avoiding the complicated calculation in the near field acoustic holography technology. The simulation results show that the reconstructed sound field curve after the surface sound source is equivalent to multiple point sound sources is basically the same as that generated by the original plane sound source. In addition, the comparison between the simulation calculation and the measured data of 1 000 kV substation shows that the proposed acoustic model can accurately predict the noise value at any point in the substation, and the error is not more than 1.5 dB.
【作者单位】： 国家电网公司;武汉大学电气工程学院;中国电力科学研究院;国网湖南省电力公司电力科学研究院;
【基金】：国家电网公司科技项目(GYW17201300115)~~
【分类号】：TM63;TM401.2
[Abstract]:An appropriate transformer acoustic model is needed to accurately evaluate the noise level in UHV substations. Therefore, the transformer is regarded as a surface sound source, and the corresponding model is established by replacing the point sound source with the surface sound source. Finally, the transformer is equivalent to a number of point sound sources. Based on the idea of equivalent source method, the sound power level is used to express the sound source strength of each equivalent point, and the equivalent process is convenient and simple. It only needs to measure the sound pressure level of a small number of field points near the transformer, thus avoiding the complicated calculation in the near field acoustic holography technology. The simulation results show that the reconstructed sound field curve after the surface sound source is equivalent to multiple point sound sources is basically the same as that generated by the original plane sound source. In addition, the comparison between the simulation calculation and the measured data of 1 000 kV substation shows that the proposed acoustic model can accurately predict the noise value at any point in the substation, and the error is not more than 1.5 dB.
【作者单位】： 国家电网公司;武汉大学电气工程学院;中国电力科学研究院;国网湖南省电力公司电力科学研究院;
【基金】：国家电网公司科技项目(GYW17201300115)~~
【分类号】：TM63;TM401.2
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