The state of the art of the development of SMES for bridging instantaneous voltage dips in Japan

Development of apparatuses for protecting industrial facilities such as semiconductor plants or information industries from instantaneous voltage dips, which requires very large output power, has been expected. A Superconducting magnetic energy storage system (SMES), one of such apparatus, consists of superconducting magnets that must withstand high voltage during operation and require high reliability. We have already development of SMES using conventional superconducting coils and done the field test of the SMES for bridging instantaneous voltage dips. After field test, the commercial SMES for instantaneous voltage dips is working there. Since field test has started, we have confirmed nearly 40 operations, and all have succeeded. In 2011, three commercial SMES units for bridging instantaneous voltage dips are operating in Japan.

► We have done the field test of the SMES for bridging instantaneous voltage dips. ► We have confirmed nearly 40 operations, and all have succeeded. ► In 2011, three commercial SMES units are operating in Japan. ► We manufactured a model coil of 600 mm class diameter using four bundled YBCO wires. ► The conduction-cooled YBCO coil withstood up to DC 13 kV voltages at 20 K.