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Prediction of Trichel pulse amplitude for smooth conductors and stranded conductors based on improved effective ionization integral

The electromagnetic environment problem of transmission lines has always been a key issue to be considered in the design, which is related to the corona discharge on the conductor. Trichel discharge is a typical kind of corona discharge, which can generate harmful electromagnetic filed. In this paper, an improved effective ionization integral is proposed to predict the amplitudes of Trichel pulses from both the smooth and stranded conductors. The proposed integral is based on the calculation of ion-flow field, and can be regarded as the integral of effective ionization integral along the ionization boundary. The present method makes good explanation to the characteristics of Trichel pulse amplitude for both smooth and stranded conductors, which have an apparent advantage in the prediction of Trichel pulse amplitude.