Experimental studies on field circuit of superconducting generator

Because of the superconducting field winding of superconducting generators (SCGs), the resistance and voltage drop of the field circuit are extremely low. Therefore, machine constants concerning the field circuit are different from those of conventional machines. In this paper, a method for obtaining these constants is proposed. By the use of this method, the constants are given experimentally. In SCGs with high response excitation, which can improve transient power system stability, the characteristics of high response excitation are discussed both theoretically and experimentally.