Corona losses at 230 kv with one conductor grounded

Tests have been made to determine the increase in corona losses on a high voltage transmission line, due to the grounding of one of the conductors. The corona losses under this condition of operation, which may occur on a transmission system not having the neutral solidly grounded, are shown to be considerably increased over the more usual operation with all 3 conductors at the same voltage. This corona loss may increase the in-phase component of current, with a consequent effect on the operation of Petersen coils. The conductors of the line used in these tests were hollow copper conductors composed of interlocking segments.