Audible Noise and Visual Corona from HV and EHV Transmission Lines and Substation Conductors - Laboratory Tests

The results of laboratory studies and preliminary field tests exploring the effects of conductor size and bundling on audible and visual phenomena associated with corona in wet weather are presented. Tubular conductors in five diameters of 1.063 to 2.375 inches were tested. To the authors´ knowledge, this is the first paper to systematically develop the information necessary to estimate audible noise and the visual aspects of conductor corona on the variety of conductor sizes used for 345 kV to 765 kV and higher.