철도차량용 주변압기 고압권선의 고주파 특성

초록

This paper proposes the detailed model for high-frequency characteristics in high voltage windings of main transformer for the electric railway vehicle. To find the natural frequencies of primary winding, we apply the frequency sweep method from 60 Hz to 1 MHz with 1 V AC source. Each layer of winding is implemented by R-L-C-M component. And these eight sub-models are composed using n-sections ladder networks model. Finally, we simulated and analyzed the voltage-frequency relationships according to input frequency change based on frequency scan function of EMTP.