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Single-Phase Series Type Quasi Z-Source Voltage Sag-Swell Compensator for Voltage Compensation of Entire Region

전 영역의 전압보상을 위한 단상 직렬형 Quasi Z-소스 전압 Sag-Swell 보상기

  • Received : 2012.12.24
  • Accepted : 2013.03.29
  • Published : 2013.08.20

Abstract

Conventional single-phase series quasi Z-source voltage compensator can not compensate for voltage sag less than 50% that frequently occurs in the industrial field. In this study, single-phase series quasi Z-source voltage sag-swell compensator which can compensate the voltage variation of entire range is proposed. The proposed system is composed of two quasi Z-source AC-AC converters connected in series with output terminal stage. Voltage sag less than 50% could be compensated by the intersection switching control of the upper converter duty ratio and of the upper converter duty ratio. Also the compensation voltage and its flowchart for each compensation mode are presented for entire sag-swell region. To confirm the validity of the proposed system, a DSP(DSP28335) controlled experimental system was manufactured. As a result, the proposed system could compensate for the voltage sag/swell of 20% and 60%. Finally, voltage compensation factor and THD(Total Harmonic Distortion) according to voltage variation and load change were measured, and voltage quality shows a good results.

Keywords

References

  1. G. T. Heydt, "Power quality engineering," IEEE Power Eng. Rev., pp. 5-7, Sep. 2001.
  2. R. Dugan, M. Mc Grannaghan, S. Santoso, and H. Beaty, Electrical Power systems Quality. New York: McGraw-Hill, 2002.
  3. M. McGranaghan, "Overview of Power Quality Standards," PQ Network Internet Site, http://www.pqnet.electrotek.com/pqnet.
  4. Power Quality Tutorial, "PQ103-Equipment Sensitivity Basics," Power Quality Assurance Internet Site, http://www.powerquality.com/pqpark.
  5. Mark F. McGranaghan et al, "Voltage Sags in Industrial Systems," IEEE Trans. Ind. Applicat., Vol. 29, No. 2, pp. 397-403, 1993. https://doi.org/10.1109/28.216550
  6. 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. Applicat., Vol. 43, No. 5, pp. 1309-1319, 2007. https://doi.org/10.1109/TIA.2007.904430
  7. M. Vilathgamuwa, A. A. D. R. Perera, S. S. Choi, and K. J. Tseng, "Control of Energy Optimized Dynamic Voltage Restorer," in Proc. IEEE IECON'99, pp. 873-878, 1999.
  8. T. Jimichi, H. Fujita, and H. Akagi, "Design and Experimentation on a Dynamic Voltage Restorer Capable of Significantly Reducing an Energy- Storage Element," in Proc. IEEE IAS'05, pp. 896-903, 2005.
  9. D. M. Vilathgamuwa, C. J. Gajanayake, P. C. Loh, and Y. W. Li, "Voltage Sag Compensation with Z-Source Inverter Based Dynamic Voltage Restorer," in Proc. IEEE IAS'06, pp. 2242-2248, 2006.
  10. Y. G. Jung, "Three-Phase Z-Source Dynamic Voltage Restorer with a Fuel Source," Journal of KIIEE, Vol. 22, No. 10, pp. 41-48, 2008. https://doi.org/10.5207/JIEIE.2008.22.10.041
  11. M. K. Nguyen, Y. G. Jung, and Y. C. Lim, "Single-Phase Z-Source Voltage Sag/Swell Compensator," in Proc. IEEE ISIE'09, pp. 24-28, 2009.
  12. K. T. Lee, Y. G. Jung, and Y. C. Lim, "A Single-Phase Quasi Z-Source Dynamic Voltage Restorer(DVR)," Journal of KIPE, Vol. 15, No. 4, pp. 327-334, 2010.
  13. Math H.J. Bollen, "Understanding Power Quality Problems-Voltage Sags and Interruptions," IEEE Press, 2000.