The purpose of an electric railway system contact wire is to supply electric energy to trains through a contacted pantograph. This energy is then converted into mechanical energy. Recent developments in overhead contact lines include the increase in the tension force up to 34 kN according to train speeds that reach up to 400 km/h with a verified safety. Rigid conductor catenary (R-Bar) for high speeds of up to 250 km/h have been developed in tunnels to save on construction costs. This is significant because minor defects in R-bars in aspects, such as height and stagger affect installation conditions. In this study, we propose the use of a detector that measures the static characteristics to reduce the R-bar installation errors. This detector has been developed to measure the height and stagger of the contact wire using video images.
The overhead contact line (OCL) is a key piece of equipment for transmitting electrical energy to the pantograph of rail cars. Recently, a 400 km/h OCL was applied to the Honam high-speed line, and its performance was examined by running HEMU-430X. For the study, we analyzed the current of catenary wire concurrently while running HEMU-430X in the Honam high-speed line. Specifically, this study recorded the currents for each speed during operation of the railway vehicle. The analysis of the frequency of line current showed generation of third-harmonics, 15th-harmonics, 17th-harmonics, and 19th-harmonics. The current of catenary wire is a basic technology assessment used to determine the electrical safety of electric railway systems, and it can be used as a technology for analyzing circulating currents generated in the current configuration, as well as for analyzing electric fatigue of the OCL components.
Abstract: The measurement of contact wire wear in electric railways is one of the key test parameters to increase speed and maintain safety in electric railways. Wear caused by continuous interaction between pantographs and contact wires has a negative effect on current collection quality and severely damaged contact wires might cause hazardous accidents. This paper introduces a non-contact optical-based contact wire wear measuring system that will replace conventional wear detecting methods conducted by maintenance vehicles or workers. The system is implemented by high-speed cameras that can collect images of contact wires during vehicle operation, a laser used to create images profile of the contact wire surface, and a computer used to process the collected images. The proposed system is designed to assist maintenance of overhead contact lines by creating geometrically plotted images of contact wires to detect contact wire wear during operation on conventional lines or high-speed lines.
On the Implementation of an Advanced Judgement Algorithm for Contact Loss of Catenary System Young Park, Ho-Sung Jung, Il-Kwon Yun, Wonha Kim The Transactions of The Korean Institute of Electrical Engineers.2014; 63(6): 850. CrossRef
Video Image Analysis in Accordance with Power Density of Arcing for Current Collection System in Electric Railway Young Park, Kiwon Lee, Chulmin Park, Jae-Kwang Kim, Ahram Jeon, Sam-Young Kwon, Yong Hyun Cho The Transactions of The Korean Institute of Electrical Engineers.2013; 62(9): 1343. CrossRef
A Experimental Study on Train Speed and Wave Propagation Speed of Contact Wire according to the Speed-up Kiwon Lee The Transactions of The Korean Institute of Electrical Engineers.2013; 62(12): 1820. CrossRef
Implementation of Optimization of the Uplift Amount Measurement System of Overhead Contact Line Young Park, Kiwon Lee, Chulmin Park, Sam-Young Kwon The Transactions of The Korean Institute of Electrical Engineers.2013; 62(6): 886. CrossRef
Utilizing Technology in Measurement System for Catenary Current: - Focusing on Testing Results for Kyoungbu High-speed Line in Korea - Young Park, Hosung Jung, Kiwon Lee The Transactions of The Korean Institute of Electrical Engineers.2013; 62(10): 1465. CrossRef
First
Prev
