Abstract
As one of the EMU auxiliary inverter’s important performances, the symmetry of three-phase voltage puts forward high requirement in the inverter’s topologies and control strategies. Based on the method of symmetrical component, this paper builds positive-, negative-, and zero-sequence mathematical model of the three-phase inverter system with unbalanced load, and then analyses the generation mechanism of asymmetry output voltage. Afterwards it is proposed a double-loop SVPWM control strategy based on double synchronous rotating frame, and further analysis of the working mechanism and realization mode is raised. Finally, it turns out to be reliable and feasible to apply the control strategy after being tested with virtual DSP simulation model with MATLAB, and on a 3 kVA experimental prototype.
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Acknowledgments
This work is supported in part by the China National Science and Technology Support Program under Grant 2013BAG21QB00, the National Natural Science Foundation of China under Grant U1134204 and the Fundamental Research Funds for the Central Universities under Grant 2012JBM099.
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Du, H., Liu, Z., Fu, Y., Wang, L., Diao, L. (2014). Study and Implementation of Closed Loop Control Based on Double Synchronous Rotating Frame for EMU Auxiliary Inverter with Unbalanced Load. In: Jia, L., Liu, Z., Qin, Y., Zhao, M., Diao, L. (eds) Proceedings of the 2013 International Conference on Electrical and Information Technologies for Rail Transportation (EITRT2013)-Volume II. Lecture Notes in Electrical Engineering, vol 288. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-53751-6_15
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DOI: https://doi.org/10.1007/978-3-642-53751-6_15
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