A New Topology for UPQC Based on Reduced-Switch-Count Converter

Ali Ajami, Mohsen Mahmoudi, Ebrahim Seyfi, Farid Atashbahar
2.421 445


Recently, reduced switch count converter switch numerous advantages such as low cost and weight, small size and high reliability have been introduced to be used in unified power quality conditioner (UPQC). In this paper a novel topologyfor UPQC based on back-to-backB4 converter and its control system are proposed. The conventional UPQC consists of twelve switches while the proposed topology for UPQC has 8 switches. By reducing the number of switches, the price of the whole system and losses are decreased. In addition, the proposed control system can be used in conventional UPQC when one of converter legs has a faulty condition. This increases reliability of the system. Special control and modulation schemes have been offered to compensate oscillations in load and utility currents and voltages and also input power factor of UPQC. The experimental and simulation results verify the efficiency of proposed control and modulation schemes of proposed topology.


Unified Power Quality Conditioner (UPQC), Reduced Switches Count Converter, B4 Inverter

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M. F. McGranaghan, R. C. Dugan, and H. W. Bety, Electrical Power Systems Quality. New York: McGraw-Hill, 1996.

T.A.Short, Electric Power Distribution Handbook. Boca Raton, FL:CRC Press, 2004.

P. Heine, “Voltage sag distributions caused by power system faults”, IEEETrans. Power Syst., vol. 18, no. 4, pp. 1367–1373, Nov. 2003.

IEEE Recommended Practices and Requirements for Harmonic Controlin Electrical Power Systems, IEEE Std. 519-1992, Apr. 12, 1993.

A. Domijan, Jr., A. Montenegro, A. J. F. Keri, and K. E. Mattern, “Custom power devices: An interaction study”, IEEE Trans. Power Syst., vol. 20,no. 2, pp. 1111–1118, May 2005.

B. Singh, K. Al-Haddad, and A. Chandra, “A review of active filters forpower quality improvement”, IEEE Trans. Ind. Electron., vol. 46, no. 5,pp. 960–971, Oct. 19 H. Akagi, “New trends in active filters for power conditioning”, IEEETrans. Ind. Appl., vol. 32, no. 6, pp. 1312–1322, Nov./Dec. 1996.

J. Dixon, L. Morán, J. Rodríguez, and R. Domke, “Reactive power compensation technologies: State-of- the-art review”, Proc. IEEE, vol. 93,no. 12, pp. 2144– 2164, Dec. 2005.

H. Fujita and H. Akagi, “The unified power quality conditioner: The integration of series- and shunt- active filters”, IEEE Trans. Power Electron.vol. 13, no. 1, pp. 315–322, Mar. 1998.

C.P. Uzunoğlu, S. Cekli,M. Uğur, “Adaptive frequency estimation of distorted power system signals filter”, Gazi University Journal of Science, vol. 24, no. 1, pp. 85-89, Jan. 2011. extended kalman

R. Coteli, B. Dandil, F. Ata, “Fuzzy-PI current controlled D-STATCOM”, Gazi University Journal of Science, v. 24, n. 1, p. 91-99, Jan. 2011.

Lei Zhang; Poh Chiang Loh; Feng Gao; “An integrated nine-switch power conditioner”,Power Electronics Conference (IPEC),pp.2663 - 2669, 20

Van Der Broeck, H. W., and Van Wyk, J. D.: “A comparative investigation of a three-phase induction machine drive with a component minimized voltage-fed inverter under different control options”, IEEE Trans. on Industry applications, 1984, Vol. IA-20, No. 2, pp. 309- 320.

Blaabjerg, F.; Freysson, S.; Hansen, H.-H.; Hansen, S.; “A new optimized space-vector modulation strategy for a component-minimized voltage source inverter”, Power Electronics, IEEE Transactions on, vol.12, no.4, pp.704-714, Jul 1997.

Klima, J.; “Analytical investigation of an induction motor fed from Four-Switch VSI with a new space vector modulation strategy”, Energy Conversion, IEEE Transactions on, vol.21, no.4, pp.832-838, Dec. 2006.

F. Blaabjerg, D. O. Neacsu, and J. K. Pedersen, “Adaptive SVM to compensate DC-link voltage ripple for four-switch three-phase voltage-source inverters”, IEEE Trans. Power Electron., vol. 14, pp. 743-752, Jul. 1999.

R. Wang, J. Zhao, and Y. Liu, “A Comprehensive Investigation of Four-Switch Three-Phase Voltage Source Inverter Based on Double Fourier Integral Analysis,” Science, no. 60874047, pp. 1-25.

N. Mohan, T. M. Undeland, and W. P. Robbins, Power Electronics: Converters, Applications, and Design. New York: Wiley, 1995

Ming H. ,H. Chen, “Modeling and Controlling of Unified Power Quality Compensator”,Proceedings of the 5th International Conference on Advances in Power System Control, Operation and Management, APSCOM,vol.2, no., pp. 431-435,Oct. 2000.

Fuji Electric Device Technology Co., Ltd, “Fuji IGBT Modules Application Manual”, Feb. 2004

Dušan, Graovac; Marco, Pürschel, Infineon Technologies AG, “IGBT Power Losses Calculation Using the Data-Sheet Parameters”, Jan. 2009

FGW40N120VD Datasheet, www.fujielectric.com BUP400D Datasheet, SIEMENCE, Jul, 1996

HCPL316j Datasheet, www.DatasheetCatalog.com