Performance enhancement of a dynamic voltage restorer
Performance enhancement of a dynamic voltage restorer
Custom power devices are widely employed to mitigate power quality issues affecting critical loads. The dynamic voltage restorer is one of the custom power devices designed to inject a voltage in series with line to present a pure sinusoidal voltage of the desired RMS value to the sensitive loads, if the supply side is affected by voltage disturbances. The design and implementation of a DVR with a quasi-impedance source inverter and variable structure control is discussed in this paper. The voltage boosting ability of a quasi-impedance (Z) source inverter is used here to improve the performance of the DVR with reduced energy storage. The control system designed based on variable structure control effectively supports the DVR with good dynamic response, even under parameter variations. Performance of the proposed system in a single phase network is evaluated against the conventional DVR system using MATLAB simulation studies. An experimental model of the proposed system was developed to validate the simulation results. Imp
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- [1] McGranaghan MF, Mueller DR, Samotyj MJ. Voltage sags in industrial systems. IEEE T Ind Appl 1993; 29: 397-403.
- [2] Bollen MHJ. Understanding Power Quality Problems - Voltage Sags and Interruptions. New York, NY, USA: IEEE Press, 2000.
- [3] IEEE Standards Board, 2009. IEEE Recommended Practice for Monitoring Electric Power Quality. New York, NY, USA: IEEE Press. pp.12.
- [4] Dugan RC, McGranaghan MF, Beaty HW. Electric Power Systems Quality. 2nd ed. New York, NY, USA: McGrawHill, 2006.
- [5] Ghosh A, Ledwich G. Power Quality Enhancement Using CustomPower Devices. London, UK: Kluwer, 2002.
- [6] Ghosh A, Ledwich G. Compensation of distribution system voltage using DVR. IEEE T Power Del 2002; 17: 1030-1036.
- [7] Cheng P, Huang C, Pan C, Bhattacharya S. Design and implementation of a series voltage sag compensator under practical utility conditions. IEEE T Ind Appl 2003; 39: 844-853.
- [8] Sng EKK, Choi SS, Vilathgamuwa DM. Analysis of series compensation and DC-link voltage controls of a transformer less self charging dynamic voltage restorer. IEEE T Power Del 2004; 19: 1511-1518.
- [9] Lamoree J, Tang L, DeWinkel C, Vinett P. Description of a micro-SMES system for protection of critical customer facilities. IEEE T Power Del 1994; 9: 984-991.
- [10] Ramachandaramurthy VK, Fitzer C, Arulampalam A, Zhan C, Barnes M, Jenkins N. Control of a battery supported dynamic voltage restorer. Proc Inst Electr Eng Generation, Transmission Distrib 2002; 149: 533-542.
- [11] Raviraj VSC, Sen PC. Comparative study of proportional, integral, sliding mode, and fuzzy logic controllers for power converters. IEEE T Ind Appl 1997; 33: 518-524.
- [12] Rao RRE, Kolhatkar YY, Das SP. Experimental Investigation of DVR with Sliding Mode Control. In: IEEE 2006 Power India Conference; 1012 April 2006; New Delhi, India: pp. 5-10.
- [13] Rao RRE, Kolhatkar YY, Das SP. Experimental Investigation of Sliding Mode Control of Inverter for Custom Power Applications. In: IEEE Power Engineering Society General Meeting; 1822 June 2006; Montreal, Quebec, Canada: pp. 8-16.
- [14] Adib A, Ahmad AA, Mohammadian M. Fixed Switching Frequency Sliding Mode Control for Single-Phase Unipolar Inverters. IEEE T Power Electr 2012; 27: 2507-2514.
- [15] Fitzer C, Barnes M, Green P. Voltage sag detection technique for a dynamic voltage restorer. IEEE T Ind Appl 2004; 40: 203-212.
- [16] Anderson J, Peng FZ. A class of quasi-Z-source inverters. IEEE Industry Applications Society Annual Meeting (IAS08); Oct. 59, 2008; Edmonton, AB, Canada: pp. 1-7.
- [17] Tang Y, Xie S, Zhang C. Single-phase Z-source inverter. IEEE T Power Electr 2011; 26: 3869-3873.
- [18] Shahparasti M, Larijani SA, Fatemi A, Varjani YA, Mohammadian M. Quasi Z-source inverter for photovoltaic system connected to single phase AC grid. Proc. 1st Power Electron. Drive Syst. Technologies Conf; 1718 February 2010; Tehran, Iran; pp. 456-460.
- [19] Sadigh AK, Smedley KM. Review of voltage compensation methods in dynamic voltage restorer (DVR). IEEE Power and Energy Society General Meeting; 22-26 July 2012; San Diego, CA, USA; pp. 1-8.