Current Distortion Evaluation in Traction 4Q Constant Switching Frequency Converters
- 1
- 2
- 3
- 4
Abstract
The paper deals with the power quality analysis of interlaced four quadrant (4Q) converters with constant switching frequency. These are in fact the input stages of the locomotives and high speed trains supplied by 25 kV, 50 Hz and 15 kV, 16.7 Hz lines. Due to the high power needed for the trains circulation, the 4Q converter can absorb distorted currents, whose harmonic content can affect the signaling systems and communication devices. The presence of more converters gives the opportunity, using dedicated commutation strategy, to interlace them in order to reduce the harmonic content in the absorbed current. In the paper a suitable model of more 4Q converters is developed. The control logic implemented in the model allows the evaluation of the harmonic contribution of both single converter and the interlaced configuration. The analysis is carried out through electromagnetic transient simulations.
- G. W. Chang, H.-W. Lin, and S.-K. Chen, “Modeling characteristics of harmonic currents generated by high-speed railway traction drive converters,” Transactions on Power Delivery, IEEE, Vol. 19, No. 2, pp. 766–773, April 2004.
- F. Perticaroli, “Electric systems for transportation,” (in Italian), Casa Editrice Ambrosiana, Milano (Italy), January 2001.
- M. Brenna, F. Foiadelli, G. C. Lazaroiu, and D. Zaninelli, “Four quadrant converter analysis for high speed trains,” 12th International Conference on Harmonics and Quality of Power–ICHQP’06, Cascais, Portugal, 1–6 October 2006.
- M. S. Carmeli, F. Castelli Dezza, and G. Superti Furga, “Smart modulation: A new approach to power converter control,” EPE’01, Graz, Austria, 27–29 Aug. 2001.
- M. S. Carmeli, F. Castelli Dezza, and G. Superti Furga, “Constant frequency current modulation algorithm based on linkage flux,” PESC’03, Power Electronics Specialists Conference, Acapulco, Mexico, 15–19 June 2003.
- F. Foiadelli, G. C. Lazaroiu, and D. Zaninelli, “Probabilistic method for harmonic analysis in railway system,” 2005 IEEE PES General Meeting, San Francisco (USA), 12–17 June 2004.
- P. Pinato and D. Zaninelli, “Harmonic disturbances in electric traction system overhead lines,” IEEE X International Conference on Harmonics and Quality of Power, Rio De Janeiro (Brasil), 6–9 October 2002.
- W. Runge, “Control of line harmonics due to four-quadrant-converter in AC tractive stock by means of filter and transformer,” in Proc. EPE’97, pp. 3.459–3.464, 1997.
- A. Capasso, R. Lamedica, R. Manigrasso, G. Sani, G. Superti Furga, and E. Tironi, “Reference power network for the harmonic propagation analysis,” European Transactions on Electrical Power Engineering ETEP, Vol. 2, 1992.
- G. Burchi, F. Foiadelli, and D. Zaninelli, “Developments of power quality studies in electric transportation system,” Electrical Power Quality and Utilisation, Journal, Vol. 6, No. 2, 2005.
- S. Burdett, J. Allan, B. Mellitt, and J. Taufiq, “A power factor and harmonic comparison of AC railway power electronic traction converter circuits,” Fifth European Conference on Power Electronics and Applications, pp. 235–240, 13–16 Sep. 1993.