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한전 실 배전계통 모델을 이용한 1단 장주 중성선 전류 계산
徐熏徹(H. C. Seo),朴乾祐(K. W. Park),金喆煥(C. H. Kim),鄭昌守(C. S. Jung),柳然杓(Y. P. Yoo),林勇勳(Y. H. Lim),?溢鎬(I. H. Seol) 대한전기학회 2007 전기학회논문지 Vol.56 No.1
The one step type and two step type pole are used in distribution line. If the three phases are not balanced, the communication line can be damaged by induced voltage. This paper calculates the neutral current using KEPCO's distribution system model which is only composed by one step type pole. The used system model is modelled by using ATPDraw and the neutral current is calculated by using EMTP/MODELS. Many cases for abstracting the neutral current characteristics in KEPCO's distribution system are simulated and analyzed.
한전 배전 계통을 이용한 2단장주의 불평형 부하에 따른 중성선 전류의 영향에 관한 연구
朴乾祐(K. W. Park),徐熏徹(H. C. Seo),金喆煥(C. H. Kim),鄭昌守(C. S. Jung),柳然杓(Y. P. Yoo),林勇勳(Y. H. Lim),李元正(W. J. Lee) 대한전기학회 2007 전기학회논문지 Vol.56 No.3
The one step type pole and two step type pole are used in KEPCO's distribution system. The neutral current increases in three-phase four-wire distribution system due to unbalanced load. Usually, power line and communication line are installed at contiguity by effect of topography in Korea. To this end, the damages such as electrostatic induction, electromagnetic induction and harmonic induction generated by induced voltage and current are occured in power line and communication line. This paper calculates the neutral current in KEPCO's distribution system using EMTP by composing various simulated conditions. Also, these results are verified by vector analysis.
林勇勳,徐東善,朴鐘大 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-
We generate short optical pulses of ~ 8 picoseconds at 10 GHz by chirped pulse compression based on phase modulation and chirp compensation. In the suggested method, sinusoidally driven intensity and phase modulators generate chirped pulses which are subsequently suppressed by chirp compensation using a single mode fiber.