Abstract
As HXD high-power AC electric locomotives and CRH (China Railways High-speed) electrical multiple units (EMUs) are put into operation in large scale in China, coupled oscillation between locomotives and traction power supply network is increasingly prominent and unfavorable for normal operations of railways and safety of equipment. Nowadays, oscillation between locomotives and traction power supply network is urgently needed to be solved. High-frequency resonance is almost solved; therefore, low-frequency oscillation becomes the focus and difficulty. In this article, the state equations of the AC electric locomotives and the traction power supply network system are converted to transfer functions, and then input admittance transfer functions of the AC electric locomotives and the traction power supply network system are obtained according to the relationship between each other. Through analysis and simulation tools, in frequency domain, qualitative analysis is carried out for four low-frequency oscillation factors including control parameters, line impedance, load, and the number of the locomotives, and frequency-domain analysis results are effectively verified through time-domain simulation. The cause that influences the low-frequency oscillation is found in the relationship among the four factors, and then, the principle of low-frequency oscillation between the AC electric locomotives and the traction power supply network is obtained.
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Feng, J., Xu, W., Chen, Z., Zhang, Z., Luo, W., Su, L. (2016). The Cause Analysis for Low-Frequency Oscillation of AC Electric Locomotive and Traction Power Supply Network. In: Jia, L., Liu, Z., Qin, Y., Ding, R., Diao, L. (eds) Proceedings of the 2015 International Conference on Electrical and Information Technologies for Rail Transportation. Lecture Notes in Electrical Engineering, vol 377. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-49367-0_59
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DOI: https://doi.org/10.1007/978-3-662-49367-0_59
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