Effect of SMES cost reductions and their visibility in the future

摘要

Optimal SMES system concepts were developed for power system stabilization (available capacity of 54 MJ, available output power of 100 MW) and load fluctuation compensation or frequency regulation (available capacity of 1,800 MJ, available output power of 100 MW) applications. The system details designs mainly composed of the superconducting coil, which aimed to achieve a cost decrease for each usage, based on four different schemes. The details of the designs and cost-reduction efforts were reviewed. Furthermore, to verify the validity of the development concept and the performance based on the detailed design result of the superconductor, five kinds of short superconductors (about 10 m) selected respectively from among four kinds of superconductors were made for trial purposes. The performance of these prototypes was analysed, including the measuremtn of current-carrying characteristics, stability and AC loss. Especially, the AC loss characteritics was measured with two devices: "superconductor coupling loss measurement device" of Kagoshima University; and "actual AC loss measurement device", equipment was that built to enable the measurement and assessment of AC loss under conditions closely approximating the actual magnetic fields.