Characteristics of Superconduction Generator at High Response Excitation

Superconducting generators have many advantages, one of which is their capability of improving the stability of power systems because of the low synchronous impedances. The advantage may be increased by adoption of high-response excitation. This led us to design and manufacture high-response excitation superconducting generator of 100kVA, which is world's first one of this type. One of the problems to solve on superconducting generator of high response excitation is the characteristics of the field circuit, which means the field current, the field magnetic induction, the flux linkage of armature winding, the loss of component material, the loss of superconducting field winding and so on. In this paper, we discuss the characteristics of the field circuit by use of 2-dimensional electro-magnetic field analysis.