Since land of Japan is narrow, it is advantageous to enlarge the transmission capacity per one route in terms of environmental aspect and cost performance. Therefore, technological development, such as multiple transmission line, large size conductor, multiple conductors, high strength insulator and so on, has been promoted. Especially, the adoption of 1000kV transmission line is the final configuration of high voltage system, and it is the dream for overhead transmission line engineer. So, we intervened the engineer who engaged in the conceptual design of 1000kV transmission line in initial stage on the development situation at that time. It is considered that the method of solving the problems is useful for present engineer.
J-STAGEがリニューアルされました！https://www.jstage.jst.go.jp/browse/-char/ja/
