New Monitoring Technologies for Overhead Contact Line at 400 km·h1.pdfVIP

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New Monitoring Technologies for Overhead Contact Line at 400 km·h1.pdf

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New Monitoring Technologies for Overhead Contact Line at 400 km·h1.pdf

Engineering 2 (2016) 360–365 Contents lists available at ScienceDirect Engineering journal homepage: /locate/eng Research Rail Transit—Review New Monitoring Technologies for Overhead Contact Line at 400?km·h–1 Chul Jin Cho a, Young Park b,* a Korea University, Seoul 02841, Korea b Korea Railroad Research Institute, Uiwang-si, Gyeonggi-do 16105, Korea article info Article history: Received 3 July 2016 Revised form 19 August 2016 Accepted 8 September 2016 Available online 21 September 2016 Keywords: High-speed railway Overhead contact lines Condition monitoring Image processing based measurement abstract Various technologies have recently been developed for high-speed railways, in order to boost commercial speeds from 300?km·h–1 to 400?km·h–1. Among these technologies, this paper introduces the 400?km·h–1 class current collection performance evaluation methods that have been developed and demonstrated by Korea. Specifically, this paper reports details of the video-based monitoring techniques that have been adopted to inspect the stability of overhead contact line (OCL) components at 400?km·h–1 without direct contact with any components of the power supply system. Unlike conventional OCL monitoring systems, which detect contact wire positions using either laser sensors or line cameras, the developed system measures parameters in the active state by video data. According to experimental results that were obtained at a field-test site established at a commercial line, it is claimed that the proposed measurement system is capable of effectively measuring OCL parameters. ? 2016 THE AUTHORS. Published by Elsevier LTD on behalf of Chinese Academy of Engineering and Higher Education Press Limited Company. This is an open access article under the CC BY-NC-ND license (/licenses/by-nc-nd/4.0/). 1. Introduction In recent modern electric railways, many countries have focused on enhancing the speed limit of commercial lines. Due to the rapid development of vehicular, track, electri