A New Unified Power Quality Conditioner based on Trans-Z-Source Inverter
Subject Areas : electrical and computer engineeringM. Siahi 1 , Mohammad Davoodi 2
1 - Islamic Azad University Science and Research Branch
2 -
Keywords: Unified power quality conditioner back to back distortion Z-source network dead time,
Abstract :
Unified Power quality conditioner (UPQC) consists of back to back voltage source inverters. In UPQC combination of parallel and series active power filters are used to compensate for the nonlinear load current harmonics and voltage distortions, simultaneously. For appropriate performance of both converters and bidirectional power flow, the DC link voltage should be at least 1.41 times larger than the line to line voltage in the high voltage part of the system; i.e. the parallel active filter. One of the determining factors for the cost of semiconductors is the maximum tolerable voltage stress. The voltage stress of the series converter increases when the DC link voltage is high. In order to overcome this deficiency, a Z-source network is added to the common structure of back to back invertors in the UPQC. It will reduce the applied DC voltage to the series active power filters significantly and decrease the cost of manufacturing. In this structure, an impedance source network is used in an AC/DC inverter to produce a buck-boost effect. Additionally, dead time has been eliminated through the use of a Z source network in the parallel active filter and thus its performance and reliability has increased impressively. In this paper, a comparison study has been conducted through necessary simulations for the performance evaluation of the common and proposed structures. The total switching device power has been used as a criteria to confirm the manufacturing cost reduction in the proposed structure.
[1] H. Fujita and H. Akagi, "The unified power quality conditioner: the integration of series and shunt active filter," IEEE Trans. Power Electronics, vol. 13, no. 2, pp. 315-322, Mar. 1998.
[2] F. Peng, Jr., G. W. Ott, and D. J. Adams, "Harmonic and reactive power compensation based on the generalized instantaneous reactive power theory for three-phase four-wire systems," IEEE Trans. on Power Electronics, vol. 13, no. 6, pp. 1174-1181, Nov. 1998.
[3] A. Nava-Segura and M. Carmona-Hernandez, "A detailed instantaneous harmonic and reactive compensation analysis of three-phase AC/DC converters, in abc and coordinates," IEEE Trans. on Power Delivery, vol. 14, no. 3, pp. 1039-1045, Jul. 1999.
[4] L. Zhang, P. C. Loh, and F. Gao, "An integrated nine-switch power conditioner for power quality enhancement and voltage sag mitigation," IEEE Transactions on Power Electronics, vol. 27, no. 3, pp. 1177-1190, Mar. 2012.
[5] J. W. Kolar, F. Schafmeister, S. D. Round, and H. Ertl, "Novel three-phase ac-ac sparse matrix converters," IEEE Trans. Power Electron., vol. 22, no. 5, pp. 1649-1661, Sep. 2007.
[6] P. C. Loh, F. Blaabjerg, F. Gao, A. Baby, and D. Tan, "Pulsewidth modulation of neutral-point-clamped indirect matrix converter," IEEE Trans. Ind. Applicat., vol. 44, no. 6, pp. 1805-1814, Nov./ Dec. 2008.
[7] E. Ledezma, B. McGrath, A. Munoz, and T. A. Lipo, "Dual ac-drive system with a reduced switch count," IEEE Trans. Ind. Applicat., vol. 37, no. 5, pp. 1325-1333, Sep./Oct. 2001.
[8] M. Jones, S. N. Vukosavic, D. Dujic, E. Levi, and P. Wright, "Five-leg inverter PWM technique for reduced switch count two-motor constant power applications," IET Proc. Electric Power Applicat., vol. 2, no. 5, pp. 275-287, Sep. 2008.
[9] Z. Peng, "Z-source inverter," IEEE Trans. on Industry Applications, vol. 39, no. 2, pp. 504-510, Mar./Apr. 2003.
[10] Y. Huang, M. Shen, F. Peng, and X. Wang, "Z-source inverter for residential photovoltaic systems," IEEE Trans. on Power Electronics, vol. 21, no. 6, pp. 1776-1782, Nov. 2006.
[11] Y. H. Kim, H. W. Moon, S. H. Kim, E. J. Cheong, and C. Y. Woo, "A fuel cell system with Z-source inverters and ultra-capacitors," in Proc. Power Electronics and Motion Control Conf., vol. 3, pp. 1587-1591, Xi'an, China, 14-16 Aug. 2004.
[12] Y. Xie, Z. Qian, X. Ding, and F. Peng, "A novel buck-boost Z-source rectifier," in Proc. Power Electronics Specialists Conf., PESC'06, 5 pp., Jun. 2006.
[13] X. Ding, Z. Qian, Y. Xie, and Z. Lu, "Three-phase Z-source rectifier," in Proc. Power Electronics Specialists Conf., PESC'05, pp. 494-500, Recife, Brazil, 16-16 Jun. 2005.
[14] Y. Li, J. Anderson, Z. F. Peng, and D. Liu, "Quasi-Z-source inverter for photovoltaic power generation systems," in Proc. IEEE PESC'09, pp. 918-924, Washington DC, USA, 15-19 Feb 2009.
[15] W. Qian, F. Peng, and H. Cha, "Trans-Z-source inverters," IEEE Trans. Power Electron., vol. 26, no. 12, pp. 3453-3463, Dec. 2011.
[16] N. Kalaiarasi, S. Paramasivam, and S. Kuntu, "Comparison of Z-source inverter with DC-DC boost converter fed VSI for PV applications," in Proc. IEEE 2nd Int. Conf. on Electrical Energy Systems, ICEES'14, pp. 87-91, Chennai, India, 7-9 Jan. 2014.
[17] D. N. Zmood and D. G. Holmes, "Stationary frame current regulation of PWM inverters with zero steady-state error," IEEE Trans. Power Electron., vol. 18, no. 3, pp. 814-822, May 2003.
[18] R. Bojoi, L. Limongi, F. Profumo, D. Roiu, and A. Tenconi, "Analysis of current controllers for active power filters using selective harmonic compensation schemes," IEEJ Trans. on Electrical and Electronic Engineering, vol. 4, no. 2, pp. 139-157, Mar. 2009.
[19] C. Lascu, L. Asiminoaei, I. Boldea, and F. Blaabjerg, "Frequency response analysis of current controllers for selective harmonic compensation in active power filters," IEEE Trans. Ind. Electron., vol. 56, no. 2, pp. 337-347, Feb. 2009.
