抄録
The power transformation technology which is the key point of electric power transmission supports our life base in the electric power energy field. Especially, the static apparatus which is used as the electric power conversion and control has an important role at the substation. In this review, the novel development of power transformation technology supporting electric power and energy is described with the maintenance diagnostic technology of sustainability and safety transformer, condenser and its applied technology for variation of power supply and load under the electric power system, high current technology under the power and electric filed and surge analysis technology at the substation. The power transformation technology and static apparatus have been developed in a high level in our country. The problem in this review will be expected to overcome soon.