Fault characteristic analysis of a modularized HTS field coil-based 12 MW class SCSG

모듈화된 계자코일을 가지는 12 MW급 초전도 발전기의 고장 특성 분석

In general, when a high-temperature superconducting (HTS) field coil breaks down, the overall field coils of a superconducting synchronous generator (SCSG) are also stopped working, because of the HTS field coils are connected in series. Therefore, the HTS field coils have to be modularized. The modularized HTS field coil is operated individually. Therefore, even if the HTS field coils are broken-down, the generator still operates under the fault conditions. But the output power and torque of the generator will be affected. This paper deals with the fault characteristics analysis of a 12 MW class SCSG with the modularized HTS field coils when the coils were broken-down. The steady-state and transient state characteristics of the modularized 12 MW class SCSG were analyzed and compared. The fault characteristics analysis results of the 12 MW class superconducting generator for the wind turbines were discussed in detail.