전기철도환경하에서 부하변동에 따른 플리커지수의 변화양상에 대한 연구

초록

The environment of electric railway has included both fast and slow load variation, which may occur in the office or maintenance factory or running electric train. This paper investigated flicker indices according to voltage fluctuations on three different situations; The base office in new subway in the daytime and night time, inside of electric train running in conventional subway. And also the variations of harmonic frequencies(2nd, 3rd, 5th) with time were measured at the same time. Flicker index is a good tool for evaluating the volage fluctuation quantitatively and show some relationship with even harmonic frequencies produced by the voltage fluctuation when the electric train is running on the railway