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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 104
Edited by: J. Pombo
Paper 148

Study on the Model of Electric Contact between Pantograph and Contact Wire

G. Zhu, W. Wang, G. Wu, G. Gao and X. Chen

School of Electrical Engineering, Southwest Jiaotong University, Chengdu, China

Full Bibliographic Reference for this paper
G. Zhu, W. Wang, G. Wu, G. Gao, X. Chen, "Study on the Model of Electric Contact between Pantograph and Contact Wire", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 148, 2014. doi:10.4203/ccp.104.148
Keywords: contact resistance, pantograph and contact wire, high speed railway.

With the rapid increase of train speed in China, contact status between pantograph and catenary are deteriorating more and more seriously as a result of the irregularity of the catenary, the pantograph head vibration and some other factors. The contact force between the pantograph and overhead contact wire plays such an important role for electrical contact, and the vibration of the pantograph head bow and contact wire make the contact force change so much. So, it is very important to keep a good contact performance between the pantograph and the contact wire. In this paper, a model of that electrical contact is described. In this model, so many factors, for example contact resistance, contact morphology and spot temperature, which will have an effect on the electrical contact were considered. By considering those factors, it is obvious that the actual contact area will be smaller than the nominal one. At the contact face, there are some contact spots which are caused by the elastic, plastic deformation, which depends on the normal pressure value. Further, when the current flows through the contact spot, a current concentration will appear, when the contact resistance formed. By simplifying many factors, the electric contact resistance formula can be concluded. In-fact, the resistance cannot be calculated in detail as so many random factors will affect it, such as the contact surface. So, in this paper, some other factors were ignored in order to analyze the regular pattern of electrical contact. After establishing a model, some changes of the model parameters have been made. In this way, the influence of the train speed on contact current, electrical contact resistance and some other parameters can be shown. It is also found that when the contact pressure increases, the contact resistance between the pantograph and catenary decreases monotonically.

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