Investigation of the Torsional Performance of Superconducting Generators with an Advanced Network-Torsion-Machine Program

To investigate the torsional performance of turbine generators with a superconducting rotor an advanced digital program was developed which simulates the very complex electromagnetic and electromechanical interaction of the multi-shell damper system of the rotor with both the electrical power system and the turbine generator shaft system [1, 2]. First results are presented, demonstrating the capability of the program and the basic behavior of the torsional turbine generator. shaft system. The latter is. displayed by comparing the torsional performance of a 850 MW turbine when coupled to both types of generators, a superconducting and a conventional generator. The comparison confirms that. the torsional impact on turbine shafts and the superconducting rotor due to electrical transients is an important aspect of superconducting generator design and that careful resonance analysis is required to avoid unduly high torsional stressing.