The traction network is a strong current, unbalanced. nonlinear, multi-conductor, time-varying distributed parameter system. The rails are under such a sophisticated electromagnetic field. The model of the rails current cannot be created very well only by conventional transmission line theory. Based on the Maxwell equation, the authors regard the model from the view of both field and circuit and then put forward the mathematical mode! The earth effect is considered. The model can be applied to not only homogeneous earth but also multi-layer earth. In addition, many factors are taken into consideration. For instance, the resistive, inductive and capacitive coupling, the earth potential and the frequency response of the traction system. Such parameters as the earth conductivity and the ballast resistance were tested on the railway side. Finally, the authors solved the model in digital computer and analyses the error. The test equipments of the strong current were developed successfully by our research group at the department of Comm. and Control in Northern Jiaotong University. We used the test equipments to have made an experiment on the railway spot. The results of the theoretical analysis turn out to be sound.
Model of Rail Current on Electrification Railway
26.06.1990
783643 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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