교류 전기철도 급전계통 해석용 단권변압기 모델링 및 임피던스 비교 분석

초록

Autotransformer is essential equipment to compensate for voltage drop and inductive disturbance of electric railway system. Usually, 0.45 ohm of autotransformer leakage impedance is used in Korea. This leakage impedance should be appropriately reflected to model the autotransformer accurately for specific analysis purposes. In this paper, we modeled the autotransformer by using both of time-domain and phasor-domain representative power system analysis program. Especially, the method of verification for the leakage impedance is described.