Influence of the high voltage overhead cable on the bearing station with short wave and its testing of the shield distance and calculation

The influence of high-voltage overhead cables on the radio bearing station with short wave comes from two aspects: one is the source, i.e. the radio interference of the high-voltage overhead cable; the other is the nonsource, i.e. the secondary radiation of the various conductors of the high-voltage overhead cable. The radio interference of the high-voltage overhead cable mainly comes from the cable corona and spark discharges. Compared with the environment noise, the corona and spark discharge, due to its existence, cause the lower noise degree rise higher, the pulse density increases. This radio interference has a certain direction, but the bearing is wide, so its influence corresponds to a raised background noise level and reduced receiving sensitivity of the short wave radio bearing station. At the same time, it has a certain deviation influence on the direction indication (azimuth) of the short wave single channel radio direction finder (especially when the direction of the incoming wave and high-voltage overhead cable are close to parallel), but this radio influence, thanks to its wide bearing, is not obvious. The influence of various conductors of the high-voltage overhead cable line and its parts, especially the perpendicular grounding posts, their secondary radiation influence is rather obvious, thus the author calculates and demonstrates the influence