Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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A Fast and Robust Grid Synchronization Algorithm of a Three-phase Converters under Unbalanced and Distorted Utility Voltages

  • Received : 2016.11.29
  • Accepted : 2017.01.15
  • Published : 2017.05.01
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Abstract

In this paper, a robust and fast grid synchronization method of a three-phase power converter is proposed. The amplitude and phase information of grid voltages are essential for power converters to be properly connected into the utility. The phase-lock-loop in synchronous reference frame has been widely adopted for the three-phase converter system since it shows a satisfactory performance under balanced grid voltages. However, power converters often operate under abnormal grid conditions, i.e. unbalanced by grid faults and frequency variations, and thus a proper active and reactive power control cannot be guaranteed. The proposed method adopts a second order generalized integrator in synchronous reference frame to detect positive sequence components under unbalanced grid voltages. The proposed method has a fast and robust performance due to its higher gain and frequency adaptive capability. Simulation and experimental results show the verification of the proposed synchronization algorithm and the effectiveness to detect positive sequence voltage.

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References

  1. F. Blaabjerg, R. Teodorescu, M. Liserre, A.V. Timbus, "Overview of Control and Grid Synchronization for Distributed Power Generation Systems," IEEE Trans. on Industrial Electronics, vol. 53, no. 5, pp. 1398-1409, Oct 2006. https://doi.org/10.1109/TIE.2006.881997
  2. L. Zhang and M. Bollen, "Characteristic of voltage dips (sags) in power systems," Power Delivery, IEEE Transactions on, vol. 15, no. 2, pp. 827-832, 2000. https://doi.org/10.1109/61.853026
  3. A. Timbus, M. Liserre, R. Teodorescu, and F. Blaabjerg, "Synchronization methods for three phase distributed power generation systems. an overview and evaluation," in Power Electronics Specialists, 2005 IEEE 36th Conference on, June 12, 2005, pp. 2474-2481.
  4. R. M. Santos Filho, P. F. Seixas, P. C. Cortizo, L. A. B. Torres, A. F. Souza, "Comparison of Three Single- Phase PLL Algorithms for UPS Applications," IEEE Trans. on Industrial Electronics, vol. 55, no. 8, pp. 2923-2932, August 2008. https://doi.org/10.1109/TIE.2008.924205
  5. L. Arruda, S. Silva, and B. Filho, "PLL structures for utility connected systems," in Industry Applications Conference, 2001. Thirty-Sixth IAS Annual Meeting. Conference Record of the 2001 IEEE, vol. 4, 30 Sept.-4 Oct. 2001, pp. 2655-2660vol.4.
  6. S.-K. Chung, "A phase tracking system for three phase utility interface inverters," Power Electronics, IEEE Transactions on, vol. 15, no. 3, pp. 431-438, May 2000. https://doi.org/10.1109/63.844502
  7. V. Kaura and V. Blasko, "Operation of a phase locked loop system under distorted utility conditions," in Applied Power Electronics Conference and Exposition, 1996. APEC '96. Conference Proceedings 1996., Eleventh Annual, vol. 2, 3-7 March 1996, pp. 703-708, vol. 2.
  8. S. Lee, J. Kang, and S. Sul, "A new phase detection method for power conversion systems considering distorted conditions in power system" in Proc. IEEEIAS Annu.Meeting, 1999, vol. 4, pp. 2167-2172.
  9. M. Karimi-Ghartemani and M. Iravani, "A method for synchronization of power electronic converters in polluted and variable-frequency environments," Power Systems, IEEE Transactions on, vol. 19, no. 3, pp. 1263-1270, 2004. https://doi.org/10.1109/TPWRS.2004.831280
  10. P. Rodriguez, R. Teodorescu, I. Candela, A. Timbus, M. Liserre, and F. Blaabjerg, "New positive sequence voltage detector for grid synchronization of power converters under faulty grid conditions," in Power Electronics Specialists, 2006 IEEE 37th Conference on, 2006, pp. 1492-1498.
  11. P. Rodriguez, J. Pou, J. Bergas, I. Candela, R. Burgos, and D. Boroyevic, "Double synchronous reference frame PLL for power converters control," in Power Electronics Specialists, 2005 IEEE 36th Conference on, 2005, pp. 1415-1421.
  12. Rodriguez, P.; Pou, J.; Bergas, J.; Candela, J.I.; Burgos, R.P.; Boroyevich, D., "Decoupled Double Synchronous Reference Frame PLL for Power Converters Control," Power Electronics, IEEE Transactions on, vol. 22, no. 2, pp. 584-592, March 2007.
  13. X. Yuan, W. Merk, H. Stemmler, and J. Allmeling, "Stationary-frame generalized integrators for current control of active power filters with zero steadystate error for current harmonics of concern under unbalanced and distorted operating conditions," Industry Applications, IEEE Transactions on, vol. 38, no. 2, pp. 523-532, March-April 2002. https://doi.org/10.1109/28.993175