Improvements of Existing Overhead Lines for 180km/h operation of the Tilting Train

초록

The purpose of this study is to establish the required improvements to existing overhead lines for 180km/h operation of the tilting train, the TTX, in Korea. Considering the technical requirements of less than 1% loss of contact and 100mm of maximum uplift, we propose the measures to improve the existing overhead lines. The tensions of the contact wire and the messenger wire, as well as the pre-sag were determined based on numerical simulations. To verify the proposed measures, on-line tests were performed under the tension and pre-sag conditions determined in the simulations. During the tests, we measured the uplift of the contact wire at the supports, the variations of the pan-head acceleration, and the force acting on the dropper. At speed up to 170km/h, the uplift fell below the permissible value and the current collection performance was shown to be appropriate. In 2008, the tests at the maximum speed will be performed under the suggested overhead line conditions.