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

The significant potential advantages of superconducting generators have stimulated large-scale efforts throughout the world to develop such generators for utility application. A thorough study of the transient performance of superconducting generators requires improved generator modeling in an efficient program for power system dynamics to adequately represent the highly complex interaction of the generator multi-damper system with the network. A novel approach to this task is presented in this paper. It consists of an advanced network-torsion- machine program to analyze electromagnetic and electromechanical transients in which iterative (repeatedly connected) T-network equivalent circuits for the generator d-q model have been integrated [1]. The capability of this program is outlined and demonstrated by a spectrum of various system disturbances imposed on a large superconducting generator. First results are discussed and highlight particular design considerations of superconducting rotors for improved transient performance.