A Study on the Geometry Change for the Increased Contact Wire Tension in the Pre-sagged Existing Catenary

사전 이도가 주어진 기설 전차선로에서 전차선 장력을 증가시켰을 때 전차선 기하학적 형상 변화 연구

  • An, Seung-Hwa (Korea Rail Network Authority Seoul Metropolitan Office) ;
  • Kim, Yoon-Ho (Department of Electrical and Electronics Engineering, Chung-Ang Univerisity)
  • Received : 2011.04.13
  • Accepted : 2012.06.16
  • Published : 2012.10.30


It is studied that the structure of the contact plane geometry of the contact wire would be changed when the contact wire tension is increased in the existing overhead contact lines for the purpose of improving the operation speed temporarily. In this paper, the dropper length formula which could be well applied to the pre-sagged catenary is reviewed first. Second, the changing amount of the pre-sag if the contact wire tension change from 20kN to 23kN or from 20kN to 25kN for the Gyeongbu HSL(high speed line) 49.5m catenary is evaluated by using of the self-written program in accordance with the dropper length formula. Moreover, the increasing tension and measuring the pre-sag change experiment in the Gyeongbu 2 HSL was conducted. The calculated data are compared with the measured data. As a result, it is found that the geometry change is very little and will not make the current collection performance deteriorated.


Supported by : 국토해양부


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Cited by

  1. Simulation and Testing of the Effect of Current Collection Performance According to Pre-sag in 400km/h Overhead Contact Lines vol.19, pp.3, 2016,