Conveners
FRI-OR7-502 SMES, Superconducting Transformers, Cables and Bulks
- Shinichi Nomura (Meiji University)
- Kohei Higashikawa (Kyushu University)
An asymmetric dependence of the critical current on the direction of an applied magnetic field in HTS coated conductors has a non-trivial influence on the AC loss of coil windings. We report the modelled influence of real conductor critical current asymmetry on the AC loss characteristics of a 1 MVA HTS transformer design previously demonstrated by the Robinson Research Institute as well as a...
Renewable energy and electric power liberalization have become important watchwords for present electric power system. However, the stability of electric power systems is also a serious concern because of the lack of inertial energy of conventional synchronous generators. Since a low system stability may cause an unexpected power oscillation with the natural frequency of an electric power...
We have been developing DC superconducting cable with magnetic energy storage function. This novel application offers high-speed and high-power charge/discharge operation indispensable for compensating output power fluctuation from renewable energy sources such as photovoltaic, wind turbine, etc. In this paper, we will report its development status under a Japanese national program: (1)...
A power supply system with transformer type superconducting magnetic energy storage (SMES) is being created to power the superconducting magnets of the particle accelerators Booster and Nuclotron of the NICA complex at JINR. The system includes a solenoid made of HTS cable, with an operating temperature of 28 K, with flow cooling by liquid neon, and an operating current of up to 8 kA with 4 s...
Magnetised bulk superconductors can be used as super-strength, stable permanent magnet analogues capable of providing magnetic fields of several tesla in a compact and portable magnet system. In addition to a large magnetic field, B, the magnetic field gradients (dB/dz, dB/dr) are naturally large. This makes them attractive for a number of engineering applications that rely on high magnetic...
Only a handful of high-temperature superconducting (HTS) electric machines using HTS bulks as magnetic poles have been developed. This is mostly due to the need for the bulks to be magnetized before use, which is a challenge for practical application. It is important to develop a magnetization method for the bulk arrays because recently we have used them as an armature for high power...
BaFe2As2 (Ba122) shows high upper critical field (Hc2 > 50 T) with small electromagnetic anisotropy (γ ~ 1-2) [1] and large critical grain boundary angle (θc ~9˚) [2], and therefore is a promising material for applications in polycrystalline form. Foreseeing high field magnet applications, Weiss et al. have reported demonstration of trapped field of 1 T for K-doped Ba122 polycrystalline bulks...
