基于Kirchhoff公式电晕可听噪声预估模型的应用

摘要

The applicability of the theoretical prediction model of corona audible noise based on Kirchhoff formula is studied. Both of line parameters and environmental parameters can affect the corona audible noise. Based on the existing models, the influence of different line parameters such as the line height, the line radius, the line phase spacing and elevation etc. on the corona audible noise is analyzed. The results show that the noise can be reduced significantly by using bundled conductors and increasing the line radius. On the other hand, increasing line height, changing the phase spacing and splitting radius have no noise reduction effect. Meanwhile, the computation results show that the corona audible noise can be exacerbated with increasing of the elevation. This conclusion may be helpful to the planning and design of transmission lines.%研究基于Kirchhoff公式建立起的电晕可听噪声理论预估模型在实际中的适用性。线路自身参数及所处环境参数都对电晕可听噪声产生影响，根据已有模型，分析计算导线半径、导线架设高度、相间距、分裂子导线数目、海拔等因素的影响。结果表明，采用分裂导线和增大导线半径可以明显降低噪声，且增加分裂子导线数目有助于降低噪声，而提高导线架设高度、改变相间距或分裂圆半径不具有降噪效果，同时计算表明电晕可听噪声随海拔的升高而加剧。所得规律有助于指导输电线路的规划设计。