Computation of Corona Current and its Effect on Travelling Surges Part I-Case of Positive Lightning Surges

A new method for calculating the corona current and its effect on high voltage travelling surges is presented. The corona current is computed using the known theories of corona discharges for different surge voltages and conductor sizes. The calculated corona current wave per meter of the line conductor is used in computing the distortion of the voltage surges as they travel along overhead transmission lines. The calculated current and distortion generally agree with previous experimental findings.