Leakage current analysis on insulator is an important method for early-warning of icing flashover.Characteristics of insulator leakage current are affected by both icing type and characteristics of insulator string.This paper presented artificial icing on glass insulators in research of trend of leakage current and change rule of ice resistance in icing and melting stages of glaze,hard rime and soft rime.With FFT analysis,harmonic components and distribution of resistive and capacitive components of leakage...