6ERIKSSON A J. An improved electrical model for transmission line shielding analysis[J]. IEEE Trans. on Power Delivery, 1987,2(3) : 859-870.
7IEEE Working Group on Estimating Lightning Performance of Transmission Lines.Estimating lightning performance of transmission lines II-updates to analytical models[J]. IEEE Trans. on PWRD, 1993,8(3): 1254-1267.
8CIGRE Working Group 01 of Study Committee 33. Guide to procedures for estimating the lightning performance oftransmission lines [M]. France : CIGRE Technical Brochure 63,1991.