Practical Design of Superconducting Generator. Electrical and mechanical design.

Abstract

Since a superconducting generator (SCG) consists of a superconducting field winding, a nonmagnetic cryogenic rotor and an airgap armature winding, its design method differs from that of the conventional generator. Practical applications require establishment of its electrical and mechanical design methods.A design flowchart of the SCG was shown and the basic design method was clarified. For this method, the electrical and mechanical design of a 50MVA experimental generator was carried out. Its design specifications and size were compared with a future 1, 120MVA generator and a 778MVA conventional generator. Furthermore, synthetic stress applied on the main rotor components, such as the torque tube and room temperature damper, was obtained. From the test results of generator power loss and the V curve under synchronous condenser operation, the design method was proved to be valid.