5CIGRE WG 31-04. Electric power transmission at voltage of 1000kV and above, plans for future ac and dc transmission, data on technical and feasibility and on general design, information on testing facilities and the research in progress[J]. Electra, 1983, 91(12).. 83-133.
9Ichida Y, Ozaki Y, Sekine Y. Lastest developments in Japanese 1000kV Transmission technology[R]. 1988 CIGRE Session, Report 38-04, 1988.
10Carrara G, Thione L. Switching surge strength of large air gaps: a physical approach[J]. IEEE Trans on Power Apparatus and Systems, 1976, 95(2): 512-524.
