Abstract
The audible noise produced by corona discharge from transmission line conductors comprises two major components, namely hum noise and random noise. Hum noise has a frequency that is twice the power line frequency and is generated primarily in rain, fog, and highly humid environments. It is one of the major factors affecting the design of conductor transmission lines for voltages above 500 kV, and it is very important to predict the level of hum noise near transmission lines. In this paper, using a comparison between measured values in the UHV Akagi test line and that using corona cage, an experimental prediction method of hum noise in rain condition is proposed. © 1998 Scripta Technica, Electr Eng Jpn, 125(1): 27–36, 1998
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