Effect of the ground resistance of coastal substations on the electromagnetic field intensity along the run of a subaqueous cable line

摘要

A total and simplified mathematical models are proposed for analysing the electromagnetic field along the run of a high-voltage cable line allowing for the ground resistance of the shore sections of the cable line. It is shown that increasing theground resistance results in an increase in the electromagnetic field intensity along the cable run. The maximum effect of the ground resistance is observed for high-voltage cable lines characterized by a high conductivity of the screen and armourgrounded in the shore sections of the cable line. To reduce the anthropogenic influence of a 220-500 kV cable line on the ichtiofauna of the bodies of water which it traverses it is necessary to reduce the value of the ground resistance of the screen andthe armour at the shore sections of the cable line