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Experimental study and modelling of overheating of electrical catenary-pantograph interface for trains supplied with power in station

机译:车站供电列车的悬链线-受电弓接口过热的实验研究与建模

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摘要

For railroads and trains, there have been many incidents involving catenary overheating at the contact with the pantograph when a train is supplied with power while standing still. The overheating of the catenary-pantograph interface can sometimes cause the contact wire to break. In order to anticipate the occurrence of such costly problems, the FEMTO-ST Institute has carried out theoretical and experimental studies in collaboration with the French National Railway Company (SNCF) to better understand this phenomenon. First, a 2D transient electrical model was developed for the contact wire. This allows the current distribution in the wire to be estimated to obtain an accurate measure of the internal heat generation. The heat produced by the interface was considered and split between the catenary and pantograph with an analytical model. Finally, the heat transfer equation for the wire under particular boundary conditions was solved for the entire finite difference network based on Euler's implicit method. The transient modelling results of the wire heating were compared with earlier experimental values, and a parametric study was performed.
机译:对于铁路和火车,当静止不动地向火车供电时,发生了许多与受电弓接触时接触网过热的事件。接触网-受电弓接口的过热有时会导致接触线断裂。为了预测此类昂贵问题的发生,FEMTO-ST研究所与法国国家铁路公司(SNCF)合作进行了理论和实验研究,以更好地理解这一现象。首先,为接触线开发了二维瞬态电模型。这允许估计导线中的电流分布,以获得内部热量产生的准确测量。考虑了界面产生的热量,并通过解析模型在悬链线和受电弓之间分配热量。最后,基于欧拉隐式方法求解了整个有限差分网络中特定边界条件下焊丝的传热方程。将线材加热的瞬态建模结果与早期的实验值进行了比较,并进行了参数研究。

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