6Goldman M,Sigmond R S.Corona and insulation[J].IEEE Transactions on Electrical Insulation Magazine,1982,17(2):90~105.
7Giao N Trinh.Discharge in air (part I: Physical mecha- nisms)[J].IEEE Electrical Insulation Magazine,1995,11 (2):23~29.
8Mcmahon J.The chemistry of organic insulating materials in HV fields and under mechanical strain[J].IEEE Trans- action on Electrical Insulation,1968,(3): 3~9.