| Hiroyuki Sampei | Transformer Dept., Kokubu Engineering & Product Div., Power & Industrial Systems, Hitachi, Ltd. |
| Kazuyuki Kinouchi | Transformer Dept., Kokubu Engineering & Product Div., Power & Industrial Systems, Hitachi, Ltd. |
Development projects have been increasing for large-capacity transformers based on a disassembled-transport system with the aim of minimizing total cost by decreasing transport expenses and reducing on-site equipment space after assembly. Hitachi, Ltd. has been involved in these efforts since the latter half of the 1980's when it developed disassembled-transport technologies that made improvements to the core partitioning method and assembly method and reassessed moisture-proof film. These technologies was used to manufacture the 220-kV 250-MVA disassembled-transport transformer in 1989 that was subsequently delivered to the Kamishiba Power Station of Kyushu Electric Power Co., Inc. More recently, with the aim of applying this technology to 500-kV class transformers, Hitachi has upgraded elemental technologies including the adoption of new film materials and further improvements to on-site assembly methods. The single-phase prototype of 500-kV 1,000-MVA transformer has been constructed based on these enhancements and each of the manufacturing processes involved has been tested. These technologies were also applied to the 275-kV 400-MVA transformer completed in March 1999 for the Nanjo Substation of Hokuriku Electric Power Company. Hitachi's plan is to apply successively these new technologies to next-generation 500-kV 1,000-MVA-1,500-MVA transformers.
 |
Power & Industrial Systems |
|
The Hitachi Hyoron (Japanese Only) |
disassembled transport, assembly method, manufacturing processes, assembly room, film pack
