Browse > Article
http://dx.doi.org/10.6113/JPE.2013.13.3.400

A Discrete State-Space Control Scheme for Dynamic Voltage Restorers  

Lei, He (College of Electrical and Electronic Engineering, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology)
Lin, Xin-Chun (College of Electrical and Electronic Engineering, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology)
Xue, Ming-Yu (College of Electrical and Electronic Engineering, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology)
Kang, Yong (College of Electrical and Electronic Engineering, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology)
Publication Information
Journal of Power Electronics / v.13, no.3, 2013 , pp. 400-408 More about this Journal
Abstract
This paper presents a discrete state-space controller using state feedback control and feed-forward decoupling to provide a desirable control bandwidth and control stability for dynamic voltage restorers (DVR). The paper initially discusses three typical applications of a DVR. The load-side capacitor DVR topology is preferred because of its better filtering capability. The proposed DVR controller offers almost full controllability because of the multi-feedback of state variables, including one-beat delay feedback. Feed-forward decoupling is usually employed to prevent disturbances of the load current and source voltage. Directly obtaining the feed-forward paths of the load current and source voltage in the discrete domain is a complicated process. Fortunately, the full feed-forward decoupling strategy can be easily applied to the discrete state-space controller by means of continuous transformation. Simulation and experimental results from a digital signal processor-based system are included to support theoretical analysis.
Keywords
Dynamic voltage restorer; Feed-forward decoupling; One-beat delay; State feedback control;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 C. Meyer, R. W. D. Doncker, Y. W. Li, and F. Blaabjerg, "Optimized control strategy for a medium-voltage DVR-heoretical investigations and experimental Results," IEEE Trans. Power Electron., Vol. 23, No. 6, pp. 2746-2754, Nov. 2008.   DOI   ScienceOn
2 J. Y. Jeong, J. H. Lee, and B. M. Han, "Three-phase line-interactive dynamic voltage restorer with a new sag detection algorithm," Journal of Power Electronics, Vol. 10, No. 2, pp. 203-209, Mar. 2010.   DOI   ScienceOn
3 D. M. Vilathgamuwa, P. C. Loh, and Y. W. Li, "Protection of microgrids during utility voltage sags," IEEE Trans. Ind. Electron., Vol. 53, No. 5, pp. 1427-1436, Oct. 2006.
4 Y. W. Li, D. M. Vilathgamuwa, P. C. Loh, and F. Blaabjerg, "A dual-functional medium voltage level DVR to limit downstream fault currents," IEEE Trans. Power Electronics, Vol. 22, No. 4, pp. 1330-1340, Jul. 2007.   DOI   ScienceOn
5 F. M. Mahdianpoor, R. A. Hooshmand, and M. Ataei, "A new approach to multifunctional dynamic voltage restorer implementation for emergency control in distribution systems," IEEE Trans. Power Delivery, Vol. 26, No. 2, pp. 882-890, Apr. 2011.   DOI   ScienceOn
6 A. Ghosh, A. K. Jindal, and A. Joshi, "Design of a capacitor-supported dynamic voltage restorer (DVR) for unbalanced and distorted loads," IEEE Trans. Power Del., Vol. 19, No. 1, pp. 405-413, Jan. 2004.   DOI   ScienceOn
7 M. J. Newman, D. G. Holmes, J. G. Nielsen, and F. Blaabjerg, "A dynamic voltage restorer (DVR) with selective harmonic compensation at medium voltage level," IEEE Trans. Ind. Appl., Vol. 41, No. 6, pp. 1744-1753, Nov./Dec. 2005.   DOI   ScienceOn
8 G. F. Teng, G. C. Xiao, L. L. Hu, Y. Lu, and Y. R. Kafle, "Control strategy based on equivalent fundamental and odd Harmonic resonators for single-phase DVRs," Journal of Power Electronics, Vol. 12, No. 4, pp. 654-663, Jul. 2012.   DOI   ScienceOn
9 H. Kim and S. K. Sul, "Compensation voltage control in dynamic voltage restorers by use of feed-forward and state feedback scheme," IEEE Trans. Power Electron., Vol. 20, No. 5, pp. 1169-1177, Sep. 2005.   DOI   ScienceOn
10 P. T. Cheng, J. M. Chen, and C. L. Ni, "Design of a state-feedback controller for series voltage-sag compensators," IEEE Trans. Ind. Appl., Vol. 45, No. 1, pp. 260-267, Jan/Feb. 2009.   DOI   ScienceOn
11 Y. H. Cho and S. K. Sul, "Controller design for dynamic voltage restorer with harmonics compensation function," in Proc. IAS, pp. 1452-1457, 2004.
12 D. M. Vilathgamuwa, A. A. D. R. Perera, and S. S. Choi, "Voltage sag compensation with energy optimized dynamic voltage restorer," IEEE Trans. Power Del., Vol. 18, No. 3, pp. 928-936, Jul. 2003.   DOI   ScienceOn
13 M. Y. Xue, Y. Zhang, Y. Kong, Y. X. Yi, S. M. Li, and F. R. Liu, "Full grid voltage feed-forward for discrete state feedback controlled grid-connected inverter with LCL filter," IEEE Trans. Power Electron., Vol. 27, No. 10, pp. 4234-4247, Oct. 2012.   DOI   ScienceOn
14 T. Jimichi, H. Fujita, and H. Akagi, "An approach to eliminating DC magnetic flux from the series transformer of a dynamic voltage restorer," IEEE Trans. Ind. Appl., Vol. 44, No. 3, pp. 809-816, May/Jun. 2008.   DOI   ScienceOn
15 M. H. J. Bollen, Understanding Power Quality Problems, John Willey&Sons, 2000.
16 Y. W. Li, "Control and resonance damping of voltage-source and current-source converters with LC filters," IEEE Trans. Ind. Electron., Vol. 56, No. 5, pp. 1511-1521, May. 2009.   DOI   ScienceOn
17 Y. W. Li, F. Blaabjerg, D. M. Vilathgamuwa, and P. C. Loh, "Design and comparison of high performance stationary-frame controllers for DVR implementation," IEEE Trans. Power Electron., Vol. 22, No. 2, pp. 602-612, Mar. 2007.   DOI   ScienceOn
18 J. D. Barros and J. F. Silva, "Multilevel optimal predictive dynamic voltage restorer," IEEE Trans. Ind. Electron., Vol. 57, No. 8, pp. 2747-2760, Aug. 2010.   DOI   ScienceOn
19 Y. W. Li, P. C. Loh, F. Blaabjerg, and D. M. Vilathgamuwa, "Investigation and improvement of transient response of DVR at medium voltage level," IEEE Trans. Ind. Appl., Vol. 43, No. 5, pp. 1309-1319, Sep./Oct. 2007.   DOI   ScienceOn
20 R. Turner, S. Walton, and R. Duke, "Robust high-performance inverter control using discrete direct design pole placement," IEEE Trans. Ind. Electron., Vol. 58, No. 1, pp. 348-357, Jan. 2011.
21 M. Y. Xue, Y. Zhang, F. R. Liu, Y. Kong, and Y. X. Yi, "Optimized pole and zero placement with state observer for LCL type grid-connected inverter," in Proceeding of ECCE, pp. 377-382, 2011.
22 Y. W. Li, D. M. Vilathgamuwa, F. Blaabjerg, and P. C. Loh, "A robust control scheme for medium-voltage-level DVR implementation," IEEE Trans. Ind. Electron., Vol. 54, No. 4, pp. 2249-2261, Aug. 2007.   DOI   ScienceOn
23 P. R. Sánchez and E. Acha, "Dynamic voltage restorer based on flying capacitor multilevel converters operated by repetitive control," IEEE Trans. Power Del., Vol. 24, No. 2, pp. 951-960, Apr. 2009.