1st Phase Results and Future Plan of DAPAS Program

At the end of July 2004 DAPAS (Development of the Advanced Power system by Applied Superconductivity technologies), which is a 10 year program, terminated the 1st phase among 3 phases. As results of the 1st phase, the meter length of coated conductor and the core technologies of the distribution line voltage class HTS power devices: cable, transformer, SFCL, and motor, were developed. In this paper, the results of 1st phase and the targets of 2nd phase will be described. In case of HTS cable project, the goal of 1st phase is to develop the three-phase 50MVA/22.9 kV class HTS cables, and a three-phase 50MVA/22.9 kV class HTS cable of 30 m length was developed and tested as the core technology development for the commercialization of HTS cable. In case of HTS transformer project, the optimal design and manufacturing technologies of HTS transformer, analysis technologies of electromagnetic field and transformer parameters were developed. In case of SFCL, there were two kinds of SFCL developed during 1st phase DAPAS program: the reactive type and the resistor type. They have the same project targets with the specification of 6.6 kV/200 A
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and showed the good performances each. In case of motor, a 100hp class HTS motor was developed so that the essential parts of technologies for the utilization of superconducting motor could be obtained. Among the coated conductor projects, the batch process using Co-evaporation and reel to reel process using PLD gave us meter-length CC tapes with which the target of 1st phase was achieved favorably. As the 2nd phase plan, the installation of HTS cable to the real utility network is in progress and also the alpha-prototype SFCL will be developed and installed in the HTS power devices field test facility. In case of motor 1MVA class will be developed 2 years later. And, we strongly expect that the 100 m length coated conductor will be developed during 2nd phase.