A Study on the Loop Current Induced by Voltage Phase Difference Substations during Parallel Feeding under the Alternating Current AT Electric Power Feeding Method

교류 AT급전방식에서 병렬급전시 변전소간 전압위상차에 의한 루프전류에 관한 연구

  • 박재석 (서울과학기술대학교, 철도전문대학원, 철도전기신호공학과) ;
  • 송중호 (서울과학기술대학교, 철도전문대학원, 철도전기신호공학과)
  • Published : 2011.10.20

Abstract

The $2{\times}25kv$ AT electric power feeding method in the A.C. electric train adopts the one-phase power feeding method as the standard due to a voltage phase difference, and the distance between the two neighboring substations is 50km due to voltage drop. The one-phase power feeding method makes the system operation feasible, while making it unfavorable for power supply. Moreover, railroad involves large-capacity single-phase load, and if it is expected to continue to rise, it is necessary to research on measures to stabilize the supply of power to railroad cars with the existing facilities. In this study, a parallel power feeding method between neighboring substations is proposed to stabilize the supply of electric power to electric railroad cars under the 2*25kv AT power feeding method and the loop current induced by voltage phase difference between the two neighboring substations during parallel power feeding is investigated.

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