基于线声源模型的交流输电线路可听噪声三维预测方法A Three-Dimensional Prediction Method of Audible Noise of AC Transmission Lines Based on Line Sound Source Model
林旗力,朱克亮,童佳君,陈文杰,谢紫银
LIN Qili,ZHU Keliang,TONG Jiajun,CHEN Wenjie,XIE Ziyin
摘要(Abstract):
可听噪声是影响架空输电线路导线选型、杆塔设计等环节的重要因素之一。基于线声源模型,提出一种交流输电线路噪声三维预测方法,并利用该方法进行实例分析。结果表明:由于线高的影响,在距线路相同水平距离上,档距中心附近的地面噪声最大,并朝着档距端部方向逐渐减小,但是该影响随着水平距离的增加而减小;线路沿线噪声随高度的增加先增大后减小,最大值出现在线路等高水平处;在线路噪声预测工作中考虑相邻跨线路噪声及地面因子的影响是必要的。与1 000 kV皖电东送特高压交流工程实测值相比,所提方法在边相导线投影外10 m和20 m处的预测值仅分别偏大0.9 dB(A)和0.4 dB(A),预测结果与实测结果较相符。
Audible noise is one of the key factors affecting the selection of overhead transmission line conductors and the design of poles. Based on the line sound source model, a three-dimensional prediction method for AC transmission line noise is proposed, and the method is used for example analysis. The results show that: due to the influence of the line-height, at the same horizontal distance from the line the ground noise near the center of the file distance is the largest, which gradually decreases towards the end of the file distance, but the influence decreases with the increase of the horizontal distance; the noise along the line increases with the height and then decreases, and the maximum value appears at the high level of the line; in the line noise prediction work, it needs to take account of the influence of adjacent cross-line noise and ground factor. Compared with the measured values of the 1, 000 kV UHVAC lines of the Anhui-East Power Transmission project, the predicted values of the proposed method are 0.9 dB(A) and 0.4 dB(A) larger at 10 m and 20 m outside the projection of the side phase conductors respectively, and the predicted results are consistent with the measured results.
关键词(KeyWords):
交流输电线路;可听噪声;线声源;预测;三维
AC transmission line;audible noise;line sound source;prediction;three-dimensional
基金项目(Foundation): 国家电网公司科技项目(5226SX20002T);; 中国能源建设集团规划设计有限公司科技项目(GSKJ2-P06-2019)
作者(Author):
林旗力,朱克亮,童佳君,陈文杰,谢紫银
LIN Qili,ZHU Keliang,TONG Jiajun,CHEN Wenjie,XIE Ziyin
DOI: 10.19585/j.zjdl.202205008
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