DOI QR코드

DOI QR Code

A Study on the Reduction of Onboard Transformer Inrush Current of Electric Railway

전기철도 차량 내 변압기의 여자돌입전류 저감에 관한 연구

  • Received : 2010.09.13
  • Accepted : 2010.11.13
  • Published : 2010.12.01

Abstract

The neutral section on electric railway system is significant sector in order to prevent short circuit of two electric powers. However, while electric trains pass the neutral section, those speed is decreased and the accident of AC electric traction system and the electric train would be occurred. So the countermeasures are urgently needed. The automatic power switching technology system that is current being research and development is system to improve these problems. Because main object of this system is power change using static switch in the neutral section, it's expected to cause a variety of transients. Especially, onboard transformer inrush current for electric railway train can be occurred more than rated current according to switching time. Therefore, the analysis and improvement are needed to ensure the stability of this system. In this paper, we analyze the operating characteristics of the automatic power switching technology system. Especially, it reviews inrush current according to the closing phase angle. And we propose control plan of inrush current considering the case that voltage is maintained due to counter electromotive force and regenerative braking operation of electric railway train. Finally, the proposed control scheme was reviewed using the transient analysis program.

Keywords

References

  1. 한국철도기술연구원, "사구간 통과에 따른 차량주회로 과도특성에 관한 연구" 보고서, 2005
  2. 김정철, 전기철도의 급전시스템과 보호, 기다리, 2004
  3. 안영훈, 강창호, "최대 200km/h로 속도 향상된 Catenary system에 적용한 절연구분장치", 한국철도학회 추계 학술대회 논문집, pp. 541-546, 2003
  4. 한국철도공사, "절연구간 무접점 자동 전원절체 통과시스템 기술개발"보고서, 2010
  5. 허재선, 신희상, 강병욱, 김재철, 전용주, "PSCAD/ EMTDC를 이용한 전기철도 차량 내 변압기의 돌입전류 분석", 대한전기학회 전력계통연구회 춘계학술대회논문집, pp. 99-101, 2010
  6. 최준호 외 6명, "전기철도계통에 순간전압강하 보상장치 적용에 관한 연구", 조명・전기설비학회 논문지 제 17권 제 6호, pp. 95-104, 2003
  7. Ajiki Kohi 외 4명, "Investigation of Shinkansen Static Changeover Switch Capable of Suppression of Exciting Inrush Current into Transformer on Train", Transactions of the Institute of Electrical Engineers of Japan Vol. 121-D No. 3, pp. 340-346, 2001