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http://dx.doi.org/10.6113/TKPE.2020.25.4.293

Design of Triple Loop Current Control for Auxiliary Power Unit of Fuel Cell Train having Grid Connected Inverter Function  

Kwon, Il-Seob (Dept. of Control & Instrumentation Eng, Korea Nat'l Univ of Transportation)
Baek, Seung-Woo (Dept. of Control & Instrumentation Eng, Korea Nat'l Univ of Transportation)
Kim, Hag-Wone (Dept. of Control & Instrumentation Eng, Korea Nat'l Univ of Transportation)
Cho, Kwan-Yual (Dept. of Control & Instrumentation Eng, Korea Nat'l Univ of Transportation)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.25, no.4, 2020 , pp. 293-302 More about this Journal
Abstract
This study proposes a triple-loop current control method for the auxiliary power unit of fuel cell trains. The auxiliary power unit of fuel cell trains has a grid-connected function when power is supplied to the utility grid. Moreover, the auxiliary power unit of trains has a 1500 V DC link voltage; thus, PWM frequency cannot be increased to a high frequency. Owing to this low PWM frequency condition, creating a triple-loop design is difficult. In this study, a triple-loop controller is developed for a capacitor voltage controller in standalone mode that operates as an auxiliary power supply for trains and for a grid current controller in grid control mode with an inner capacitor voltage controller. The voltage controller employs an inductor current controller inner loop. To overcome low PWM frequency, a design method for the bandwidth of the capacitor voltage controller considering the bandwidth of the inner inductor current controller is described. The effectiveness of the proposed method is proven using PSIM simulation.
Keywords
Grid connected inverter; Tripple loop current control; Fuel cell;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 W. Lee and S. Kang, "Protection for distributed generati ons in the DC micro-grid," in 2011 2nd IEEE PES Inte rnational Conference and Exhibition on Innovative Smart Grid Technologies, Manchester, pp. 1-5, Dec. 2011.
2 C. Hongbing, Z. Xing, L. Shengyong, and Y. Shuying, "Research on control strategies for distributed inverters i n low voltage micro-grids," in The 2nd International Sy mposium on Power Electronics for Distributed Generati on Systems, Hefei, pp. 748-752, Jun. 2010.
3 J. Y. Kim, K. B. Wan, P. S. Hee, S. D. Ho, K. H. Jung, and J. Y. Po. "Study on charging and discharging characteristics of energy storage system in electric railway power system," Journal of the Korean Society for Railway Conference, pp. 564-569, May. 2017.
4 K. W. Lee, S. H. Chang, J. R. Kim, and M. S. Han, "Study on hydrogen fuel cell operation for the development of vehicle-to-grid locomotive," Journal of the Korean Society for Railway Conference, pp. 526-529, May 2014.
5 S. Lim, S. Seong, Y. Lee, and J. Kim. "Hydrogen fuel cell railroad technology trends," in The Korean Society for Railway Conference, pp. 314-317, Oct. 2018.
6 IEC standard 61000-3-2, "Limits for harmonic current emissions (Equipment input current up to and including 16A per phase)," 2009.
7 IEEE standard 519, "IEEE recommended practices and requirements for harmonic control in electrical power system," 2014.
8 M. Liserre, F. Blaabjerg, and S. Hansen, “Design and control of an LCL-filter based three-phase active rectifier,” IEEE Trans. On. Ind. Appl., Vol. 41, No. 5, pp. 1281-1291, 2005.   DOI
9 B. W. An, C. P. Hong, H. W. Kim, K. Y. Cho, and B. K. Lim, "A study on LLCL filter to reduce harmonic current of grid connected power inverter," The Transactions of the Korean Institute of Power Electronics, Vol. 19, No. 1, Feb. 2014.
10 M. Y. Park, M. H. Chi, J. H. Park, H. G. Kim, T. W. Chun, and E. C. Nho, "LCL filter design for grid-connected PCS using total harmonic distortion and ripple attenuation factor," The Transactions of the Korean Institute of Power Electronics. Vol. 15, No. 3, pp. 1688-1694, Jun. 2010.
11 J. Kwon, S. Yoon, and S. Choi, “Indirect current control for seamless transfer of three-phase utility interactive invertrer,” IEEE Trans. on Power Electronics, Vol. 27, No. 2, pp. 773-781, Jul. 2011.   DOI
12 J. U. Lim, "Feed-forward voltage controller design of AC-DC power converter," Domestic Master's Thesis, Graduate School of Korea National University of Transportation, Chungcheongbuk-do, 2019.
13 H. Oh, S. Choi, T. Kim, K. Lee, and T. Lee, “Single operation prevention method by harmonic injection of grid-connected inverter with important load,” The Transactions of the Korean Institute of Power Electronics, Vol. 17, No. 4, pp. 315-321, Aug. 2012.   DOI
14 Z. Liu and J. Liu, “Indirect current control based seamless transfer of three-phase inverter in distributed generation,” IEEE Transactions on Power Electronics, Vol. 29, No. 7, pp. 3368-3383, Jul. 2014.   DOI