During the high economic growth period when electric power demand was continuously growing, installation and renewal of electric power equipment were actively conducted. Therefore, facility failures owing to aging were restrained. However, the increase in recent electric power demand slows down, and the capital investment decreases. This situation has stimulated concern over the increase of equipment failures owing to aging. To maintain and update a lot of electric power equipment facing aging, various investigations from viewing points such as rationalization of maintenance and equipment development are required.
In this paper, we show the estimated number of electric power facilities after 20 years and describe a fundamental way of thinking of equipment renewal. Finally, required future measures are mentioned.
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