Research on Failure of Pantograph-Catenary Sliding Electrical Contact under Fluctuation Load
Chen Zhonghua1, Wu Di1, Hui Lichuan1, Song Yuning2, Ping Yu1
1. Faculty of Electrical and Control Engineering Liaoning Technical University Huludao 125105 China; 2. Department of Mechanical and Power Engineering Yingkou Institute of Technology Yingkou 115014 China
Abstract When the electric locomotive runs at a high speed, the contact reliability between the pantograph and catenary is affected by the contact current, pressure fluctuation and speed of locomotive. Through the mutual-grinding test of metal-impregnated carbon slide and copper wire, the characteristics of contact resistance changing with the contact current, sliding speed, pressure fluctuation amplitude and pressure fluctuation frequency are obtained.The prediction model of contact resistance changing with contact current, sliding speed, pressure fluctuation amplitude and pressure fluctuation frequency is established using the extreme learning machine (ELM). The contact resistance and current stability coefficient are considered comprehensively to propose the failure criterion of pantograph-catenary sliding electrical contact. The mechanism of contact failure of the pantograph-catenary is analyzed. The increasing of the amplitude of contact pressure fluctuation and sliding speed makes the friction vibration between the pantograph and catenary more serious. As a result, the contact resistance increases beyond the critical value, which causes the contact failure. Based on above theory, the model of failure probability is established according to the probability distribution of contact resistance. Finally, the failure probability of sliding electrical contact of the pantograph-catenary under certain working conditions is given.
Chen Zhonghua,Wu Di,Hui Lichuan等. Research on Failure of Pantograph-Catenary Sliding Electrical Contact under Fluctuation Load[J]. Transactions of China Electrotechnical Society, 2019, 34(21): 4492-4500.
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2019, Vol. 34 
