Though the power supply to airplane warning light installed in transmission line tower is generally carried out by low voltage distribution line, in especially basic transmission line over 500kV with many mountainous area the inside of transmission line, there are many cases in which there is no a distribution line near, and considerable labor and cost for the power supply are needed. Then, authors developed electromagnetic induction type power source equipment which took out the electric power by using current transformer from induced current which flows in overhead earth wire.
First, the power source equipment which used the penetration type for CT for the power: was developed, and the demonstration experiment for about 10 months was carried out in Tokyo Electric Power Co., Inc. Minami Niigata trunk line. As the result it was able to be verified that operating characteristic and environment-resistant characteristics of the power source equipment were good. For the purpose of applying to Tokyo Electric Power Co., Inc. Minami Iwaki trunk line in continueing, the power source equipment which used winding type for CT for the power was developed. This equipment finishes the installation construction in July, 1999, after the test in the factory is carried out, and it is carrying out the practical use in Minami Iwaki trunk line at present.
In this paper, the content is reported on power source equipment applied to Minami Iwaki trunk line on EMTP analysis of the overhead earth wire current and outline of developed power source equipment and means of application to the continuous line road and operation situation in the operation and comparison examination with analytic value.
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