Calculation Method of Corona Loss of Transmission Line Based on AC/DC Power Flow

The line loss caused by corona of transmission line is not negligible in EHV power systems. Based on this, an AC/DC power flow model which includes corona influence of AC transmission line and DC transmission line to power flow and energy loss are presented in this paper. The results of an example of 7 node AC/DC transmission system show that the corona loss values obtained by the method in this paper are close to the actual measured values, and consistent with actual conditions. At the same time, the ratio of the corona loss to the total loss of the system can be analyzed by the method in real time.