A Switching Algorithm for AC-AC Converter Based Voltage Compensator without Using Snubber Circuit

Document Type : Original Article

Authors

Faculty of Electrical and Computer Engineering, Urmia University, Urmia, Iran

Abstract

Series voltage compensation is used in low-voltage distribution system to compensate for voltage variations. The compensators are indeed series-connected converters which inject the missing voltage in series to the grid in case of voltage sag. In this paper, a switching algorithm for AC-AC converter based voltage compensator is proposed. As the bidirectional AC power electronic switches are used in the AC-AC converters, considering the switching dead-time, snubber circuits should be used in parallel with the switches to provide a current path during the dead-time and hence to reduce the dv/dt stresses on the switches. The snubber circuits increase the circuit elements and have their own power losses. Using the proposed switching algorithm, the snubber circuits could be eliminated since a current path is always (including the dead-time) guaranteed. In order to evaluate the proposed algorithm, the simulation studies and discussions are presented.

Keywords

References

[1]      M. Farhadi-Kangarlu, E. Babaei, and F. Blaabjerg, "A comprehensive review of dynamic voltage restorers," International Journal of Electrical Power & Energy Systems, vol. 92, pp. 136-155, 2017.
[2]      سید حسین طباطبائی و علیرضا جلیلیان، "کنترل بازیاب دینامیکی ولتاژ مبتنی بر فیلتر شکافی تطبیقی و میراسازی فعال به‌منظور بهبود کیفیت توان" مجله مهندسی برق دانشگاه تبریز، جلد 44، شماره 2، صفحات 23-34، تابستان 1393.
[3]      محمد فرهادی کنگرلو، جبران‌سازی کم‌بود و بیش‌بود ولتاژ با استفاده از DVRهای مبتنی بر مبدل‌های AC-AC مستقیم، پایان‌نامه کارشناسی ارشد، دانشگاه تبریز، تبریز، 1389.
[4]      V. B. Bhavaraju and P. Enjeti, "A fast active power filter to correct line voltage sags," IEEE Transactions on Industrial Electronics, vol. 41, no. 3, pp. 333-338, 1994.
[5]      S. M. Hietpas and M. Naden, "Automatic voltage regulator using an AC voltage-voltage converter," IEEE Transactions on Industry Applications, vol. 36, no. 1, pp. 33-38, 2000.
[6]      ابراهیم بابائی، محمد فرهادی کنگرلو، "جبران‌کننده دینامیکی کم‌بود ولتاژ در شبکه‌های توزیع برق با استفاده از مبدل ac/ac مستقیم" مجله مهندسی برق مدرس، دوره 11، شماره 5، بهار 1390.
[7]      E. Babaei, M. F. Kangarlu, and M. Sabahi, "Compensation of voltage disturbances in distribution systems using single-phase dynamic voltage restorer," Electric Power Systems Research, vol. 80, no. 12, pp. 1413-1420, 12// 2010.
[8]      J. Perez, V. Cardenas, H. Miranda, and R. Alvarez, "Compensation of voltage sags and swells using a single-phase AC-AC converter," in 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004, 2004, vol. 2, pp. 1611-1616 Vol. 2.
[9]      K. Lee, H. Koizumi, and K. Kurokawa, "Voltage Sag/Swell Controller by Means of D-UPFC in the Distribution System," in 2006 IEEE 4th World Conference on Photovoltaic Energy Conference, 2006, vol. 2, pp. 2427-2430.
[10]      E. Babaei and M. Farhadi Kangarlu, "Operation and control of dynamic voltage restorer using single-phase direct converter," Energy Conversion and Management, vol. 52, no. 8–9, pp. 2965-2972, 8// 2011.
[11]      E. Babaei and M. F. Kangarlu, "A new topology for dynamic voltage restorers without dc link," in Industrial Electronics & Applications, 2009. ISIEA 2009. IEEE Symposium on, 2009, vol. 2, pp. 1016-1021: IEEE.
[12]      ابراهیم بابائی، محمد فرهادی کنگرلو، "بازیاب دینامیکی ولتاژ بر پایه مبدل‌های ماتریسی" مجله مهندسی برق دانشگاه تبریز، جلد 40، شماره 1، صفحات 1-12، 1389.
[13]      E. Babaei, M. F. Kangarlu, and M. Sabahi, "Mitigation of voltage disturbances using dynamic voltage restorer based on direct converters," IEEE Transactions on Power Delivery, vol. 25, no. 4, pp. 2676-2683, 2010.
[14]      A. Prasai and D. M. Divan, "Zero-Energy Sag Correctors—Optimizing Dynamic Voltage Restorers for Industrial Applications," IEEE Transactions on Industry Applications, vol. 44, no. 6, pp. 1777-1784, 2008.
[15]      A. Prasai and D. M. Divan, "Zero-Energy Sag Corrector With Reduced Device Count," IEEE Transactions on Power Electronics, vol. 24, no. 6, pp. 1646-1653, 2009.
[16]      X. Fang, G. Gao, L. Gao, and B. Ma, "Three-phase voltage-fed quasi-Z-source AC-AC converter," CES Transactions on Electrical Machines and Systems, vol. 2, no. 3, pp. 328-335, 2018.
[17]      S. Srinivasan and G. Venkataramanan, "Design of a versatile three-phase AC line conditioner," in IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting, 1995, vol. 3, pp. 2492-2499 vol.3.
[18]      G. Venkataramanan, B. K. Johnson, and A. Sundaram, "An AC-AC power converter for custom power applications," IEEE Transactions on Power Delivery, vol. 11, no. 3, pp. 1666-1671, 1996.
[19]      G. Venkataramanan and B. Johnson, "A pulse width modulated power line conditioner for sensitive load centers," IEEE Transactions on Power Delivery, vol. 12, no. 2, pp. 844-849, 1997.
[20]      X. Fang, G. Gao, L. Gao, and B. Ma, "Three-phase voltage-fed quasi-Z-source AC-AC converter," CES Transactions on Electrical Machines and Systems, vol. 2, no. 3, pp. 328-335, 2018.
[21]      S. Subramanian and M. K. Mishra, "Interphase AC–AC Topology for Voltage Sag Supporter," IEEE Transactions on Power Electronics, vol. 25, no. 2, pp. 514-518, 2010.
[22]      E. Babaei and M. F. Kangarlu, "Cross-phase voltage sag compensator for three-phase distribution systems," International Journal of Electrical Power & Energy Systems, vol. 51, pp. 119-126, 2013.
[23]      S. Jothibasu and M. K. Mishra, "An Improved Direct AC–AC Converter for Voltage Sag Mitigation," IEEE Transactions on Industrial Electronics, vol. 62, no. 1, pp. 21-29, 2015.
[24]      B. Singh, S. Kumar, and C. Jain, "Damped-SOGI-Based Control Algorithm for Solar PV Power Generating System," IEEE Transactions on Industry Applications, vol. 53, no. 3, pp. 1780-1788, 2017.
[25]      X. He, H. Geng, and G. Yang, "Reinvestigation of Single-Phase FLLs," IEEE Access, vol. 7, pp. 13178-13188, 2019.
[26]      F. Xiao, L. Dong, L. Li, and X. Liao, "A Frequency-Fixed SOGI-Based PLL for Single-Phase Grid-Connected Converters," IEEE Transactions on Power Electronics, vol. 32, no. 3, pp. 1713-1719, 2017.
TABRIZ JOURNAL OF ELECTRICAL ENGINEERING
Volume 50, Issue 4 - Serial Number 94
March 2021
Pages 1745-1756

Files

Share

How to cite

Statistics