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A Model for Pantograph-Catenary Electromechanical Interaction

Volume 14, Number 12, December 2018, pp. 3140-3150
DOI: 10.23940/ijpe.18.12.p23.31403150

Yuan Zhong, Jiqin Wu, Feng Han, and Jiawei Zhang

Southwest Jiaotong Unversity, Chengdu, 610031, China

(Submitted on September 12, 2018; Revised on October 13, 2018; Accepted on November 14, 2018)


The pantograph-catenary system is one of the most important ways to supply power for running trains. Electromechanical phenomena affect its economic operation. Because former research was mostly experimental, this paper presents a preliminary model for electromechanical interactions. In this model, electrical contact resistance and contact force are calculated in a defined contact interspace as finite cuboid elastic elements. On the assumption that the heights of all asperities follow the Gaussian distribution, a simulation is carried out and the following conclusions can be drawn: 1) the real contact area of the strip and contact wire can increase with the nominal contact area, but when the nominal contact area exceeds a value, the real contact area will no longer increase; 2) the growing contact force can enlarge the real contact area and reduce electrical contact resistance with its randomness; 3) pantograph sliding can be equivalent to contact elements disconnecting and connecting, which can explain why arc occurs more frequently in two conditions: when the contact force decreases and when the contact force is low.


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