Experimental Study on Wind Noise Distribution Law of Transmission Lines

Abstract

Aiming at the problem of wind noise generated by transmission lines under windy weather conditions, this paper selects three groups of transmission lines in Shandong Province, China. Through the fixed-point measurement of the wind noise pressure of the conductor at the ground projection point of the side, phase conductor sags as the starting point, and the outward extension of 50 m as the endpoint, the frequency spectrum curve characteristics of the wind noise of the transmission line, the predominant frequency, the cut-off frequency, and the overall A sound level are analyzed. The results show that the transmission line conductor wind noise is mainly concentrated in the range of 500 - 2000 Hz, and its predominant frequency is around 650 Hz, which belongs to low-frequency noise. The wire wind noise attenuates with the increase of the distance from the projection point, and the attenuation is completed at 50m, and the wind noise fixed-point measurement decreases by 8 dB.