155 REFERENCES 1. Arnold R. (2001), ‘Solutions to the power quality problem’, Power Engineering Journal, Vol. 15, pp.65-73. 2. Babaei E., Farhadi M. and Sabahi M. (2010), ‘Compensation of voltage disturbances in distribution systems using single phase dynamic voltage restorer’, Elect. Power Syst. Res., Vol. 14, No.2, pp. 112-125. 3. Banaei M.R.., Hosseini S.H., Khanmohamadi S. and Gharehpetian G.B. (2006), ‘Verification of a new energy control strategy for dynamic voltage restorer by simulation’, Simulation Modeling Practice and Theory, Vol. 14, No.2, pp. 112-125. 4. Benachaiba C. and Ferdi B. (2008), ‘Voltage quality Improvement using DVR’, Electrical Power Quality & Utilization Journal, Vol. 14, No. 1 pp.39-45. 5. Bollen M.H.J. (2003), ‘What is Power Quality?’, Elect. Power Syst. Res., Vol. 66, no. 1, pp. 5-14. 6. Boonchiam P. and Mithulananthan N. (2006), ‘Understanding of Dynamic Voltage Restorers through MATLAB Simulation,’ Thammasat Int. J. Sc. Tech., Vol. 11, No. 3. 7. Bose B.K. (2008), ‘Modern Power Electronics and AC Drives’. Prentice-Hall India. 8. Brumsickle W.E., Schneider R.S., Luckjiff G.A., Divan D.M. and Mc Franaghan M.F. (2001), ‘Dynamic sag correctors: Cost-effective industrial power line conditioning’, IEEE Trans. Ind. Appl., Vol. 37, No. 1, p.212. 9. Buxton R. (1998), ‘Protection from voltage dips with the dynamic voltage restorer’, in IEE Half Day Colloquium on Dynamic Voltage Restorers - Replacing Those Missing Cycles, pp. 3/1-3/6. 10. Changjiang Z., Arulampalam A. and Jenkins N. (2003) ‘Four-wire dynamic voltage restorer based on a three-dimensional voltage space vector PWM algorithm’, IEEE Trans. Power Electron., Vol. 18, No. 4, p.1093. 156 11. Chang S., Ho Y.S. and Loh P.C. (2000), ‘Voltage quality enhancement with power electronics based devices’, In IEEE Power Engineering Society Winter Meeting, pp. 2937-2942. 12. Chen S., Joos G., Lopes L. and Guo W. (2002), ‘A nonlinear control method of dynamic voltage restorers’, IEEE 33rd Annual Power Electronics Specialists Conference, pp.88-93. 13. Chung Y., Park S.Y., Moon S. and Hur S. (2001), ‘The control and analysis of zero sequence components in DVR system’, in Proc. 2001 IEEE-PES Winter Meeting, Vol. 3, pp.1021-1026. 14. Corzine K. and Familiant Y. (2002), ‘A new cascade Multilevel Hbridge drive’, IEEE Trans. Power Electron. Vol. 17, No. 1, pp.125-131. 15. Dixon J. and Moran L. (2005), ‘A clean four-quadrant sinusoidal power rectifier, using multistage converters for subway applications’, IEEE Trans Ind. Electron., Vol. 52, No.3, pp.653-661. 16. Dixon J., Ortuzar M. and Rfos F. (2003), ‘Traction drive system for electric vehicles, using Multi-level converter’, presented at 19th Electric vehicle symp. EVS – 19 [CD-ROM]. 17. Dixon J., Moran L., Breton A. and Rfos F. (2002), ‘Multilevel inverter, based on multistage connection of three-level converters, scaled in power of three’, IEEE Ind. Electron., pp.886-891. 18. Dixon J. and Moran L. (2006), ‘High-level Multistep inverter optimization using a minimum of power transistors’, IEEE Trans. Ind. Electron., Vol. 21., No. 2, pp.330-337. 19. Etxeberria-Otadui, Viscarret U., Bacha S., Caballero M. and Reyero R. (2002), ‘Evaluation of different strategies for series voltage sag compensation’, in Proc. IEEE-PESC, Vol. 4, pp.1797 -1802. 20. Fitzer C., Barnes M., and Green P. (2004), ‘Voltage Sag Detection Technique for a Dynamic Voltage Restorer’, IEEE Transactions on Industry Applications, Vol. 40, pp. 203-212. 21. Fukuta Y. and Venkataramanan G. (2002), ‘DC bus ripple minimization in cascaded H-bridge multilevel converters under staircase modulation’, in Proc. IAS Annu. Meeting, Pittsburgh, PA, p.1988. 157 22. Ghosh A. and Ledwich G. (2002), ‘Power Quality Enhancement Using Custom Power Devices’, Kluwer Academic Publishers, Boston, USA. 23. Haddad K. and Joos G. (1997), ‘Distribution system voltage regulation under fault conditions using static series regulators’, Proc. IEEE-IAS, Vol. 2, pp.1383-1389. 24. Hingorani N.G. (1995), ‘Introducing custom power’, IEEE Spectrum, Vol. 32, No.6, p.41. 25. Ho C.N.M. and Chung, H.S.H. (2006), ‘Fast Transient Control of Single-Phase Dynamic Voltage Restorer (DVR) Without External DC Source’, 37th IEEE Power Elect. Specialists Conf. PESC '06, pp.1-7. 26. Ho C.N.M. and Chung, H.S.H. (2010), ‘Implementation and performance evaluation of a fast dynamic control scheme for capacitor – supported interline DVR’, IEEE Trans. Power Elect.., vol. 25, no. 8, pp.1975-1988. 27. Hongyang W. and Xiangning H. (2000), ‘Research on PWM control of a cascade multi-level converter’, The Third International Conference on Power Elect. and Motion Cont., Vol. 3, pp.1099-1103. 28. Hyosung Kim, Jang-Hwan Kim, Seung-Ki Sul (2004), ‘A design consideration of output filters for dynamic voltage restorers’, Power Electronics Specialists Conference, PESC 04.2004 IEEE 35th Annual, Vol. 6, pp.4268-4272. 29. Hyosung Kim and Seung-Ki Sul (2005), ‘Compensation voltage control in dynamic voltage restorers by use of feed forward and state feedback scheme’, IEEE Transactions on Power Electronics, Vol. 20, No.5, pp.1169-1177. 30. IEEE Recommended Practice for Monitoring Electric Power Quality, IEEE Std., 1159-1995. 31. Jindal A.K., Ghosh A. and Joshi A. (2008), ‘A cricitcal load bus voltage control using under system frequency variations’, Elect. Power Syst. Res., vol. 78, no. 2, pp. 255-263. 32. Jindal A.K., Ghosh A. and Joshi A. (2002), ‘Voltage regulation using dynamic voltage restorer for large frequency variations’, Power Engineering Society General Meeting, Vol. 1, pp.850- 856. 158 33. Jimichi T., Fujita H. and Akagi H. (2008), ‘Design and Experimentation of a Dynamic Voltage Restorer Capable of Significantly Reducing an Energy-Storage Element’, IEEE Transactions on Industry Applications, Vol. 44, No.3, pp.817-825. 34. Joos G., Campos A., Ziogas P. and Lindasy J. (1992), ‘Analysis and design of a series voltage compensator for three-phase unbalanced sources’, IEEE Trans. on Industrial Electronics, Vol. 39, No. 2, pp.159-167. 35. Kieferndorf R., Venkataramanan G. and Manjrekar M.D. (2000), ‘Power electronic transformer (PET) fed nine-level H-bridge inverter for large induction motor drives’, in Proc. IAS Annu. Meeting, Rome, pp.2489-2495. 36. Kim H. (2002), ‘Minimal Energy Control for a Dynamic Voltage Restorer’, in Proceedings of the Power Conversion Conference, Osaka, Japan, pp. 428-433. 37. Komatsu W., Giaretta A.R., Oliveira M.A., Monteiro T.C., Galassi M., Ahn S.U., Matakas L., Bormio E., Camargo J. and Jardini J.A. (2008), ‘Micro-DVR - A development platform for DVR and FACDS’, Transmission and Distribution Conference and Exposition, T&D, IEEE/PES, pp.1-7. 38. Li B.H., Choi S.S. and Vilathgamuwa D.M. (2002), ‘Transformerless dynamic voltage restorer’, IEEE Power Electron. Lett., Vol. 2, No. 4, pp.125-130. 39. Li B.H., Choi S.S. and Vilathgamuwa D.M. (2001), ‘Design considerations on the line-side filter used in the dynamic voltage restorer’, IEE Proceedings - Generation, Transmission and Distribution, Vol. 148, pp.1-7. 40. Li Y.W., Loh P.C., Blaabjerg F. and Vilathgamuwa D.M. (2007), ‘Investigation and improvement of transient response of DVR at medium voltage level’, IEEE Trans. Ind. Appl., Vol. 43, no. 5, pp.1309-1319. 41. Li Y.W., Vilathgamuwa D.M., Loh P.C. and Blaabjerg F. (2007), ‘A dual functional medium voltage level DVR to limit downstream fault currents’, IEEE Trans. Power Electron., Vol. 22, no. 4, pp.1330-1340. 159 42. Loh P.C., Vilathgamuwa D.M., Tang S.K. and Long H.L. (2004), ‘Multilevel dynamic voltage restorer’, IEEE Power Electron. Lett., Vol. 2 , No.4, pp.125-130. 43. Mahdiapoor F.M., Hooshmand R.A. and Ataei M. (2011), ‘ A new approach to multi-functional DVR implementations for emergency control in distribution systems’, IEEE Trans. On Power Delivery, vol. 26, no. 2, pp. 882-890. 44. Manjrekar M. and Venkataramanan G. (1996), ‘Advanced topologies and modulation strategies for Multilevel inverters’, in Proc. IEEEPESC’96 Conf., pp.1013-1018. 45. Marei M.I., Etsadany E.F. and Salama M.M.A. (2007), ‘A new approach to control DVR based on symmetrical components estimation’, IEEE Trans. Power Del., Vol. 22, No. 4, pp.2017-2024. 46. Martinez A. and Armedo J.M. (2006), ‘Voltage sag studies in distribution networks – part I: system modeling’, IEEE Trans. Power Del., Vol. 21, No 3, pp. 338-345. 47. Martinez A. and Armedo J.M. (2006), ‘Voltage sag studies in distribution networks – part II: Voltage sag assesment’, IEEE Trans. Power Del., Vol. 21, No 3, pp. 1679-1688. 48. Meyer C., Romaus C. and DeDoncker R.W. (2005), ‘Five-level neutral-point clamped inverter for a dynamic voltage restorer’, European Conference on Power Electronics and Applications, p.9. 49. Milanovic J.V. and Zang Y. (2010) ‘Global minimization of financial losses due to voltage sags with F.ACTS based devices’, IEEE Trans. Power Del., Vol. 25, No. 1, pp. 298-306 . 50. Mohan N., Undeland T.M. and Robbins W.P. (2003), Power Electronics: Converters, Applications and Design, 3rd edition New York: John Wiley & Sons. 51. Newman M.J., Holms D.G. Nielson J.G. and Blaabjerg F. (2005), ‘A dynamic voltage restorer(DVR) with selective harmonic compensation at medium voltage level’, IEEE Trans. Ind. Appl., Vol. 41, No.6, pp. 1744- 1753. 52. Nielsen J.G., Newman M., Nielsen H. and Blaabjerg F. (2004), ‘Control and testing of a dynamic voltage restorer (DVR) at medium voltage level’, IEEE Trans. Power Electron., Vol.19, No. 3, p. 806. 160 53. Nielsen J.G. and Blaabjerg F. (2005), ‘A detailed comparison of system topologies for dynamic voltage restorers’, IEEE Transactions on Industry Applications, Vol. 41, No.5, pp. 1272- 1280. 54. Ortuzar M., Carmi R., Dixon J. and Moran L. (2004), ‘Voltage source active power filter, based on Multilevel converter and ultra capacitor DC-link’, IEEE Trans. on Ind. Electron, pp. 477-484. 55. Pedro R.S., Jose E.O., Vicente F. and Aurelio G.F. (2009), ‘A versatile control scheme for a DVR for power quality improvement’, IEEE Trans. Power Del., Vol. 24, No. 1, pp. 277-284. 56. Rashid M.H. (2006), Power Electronics Circuits Devices and Applications, 3rd edition, India: Prentice-Hall of India. 57. Rodriguez J., Lai J.S. and Peng F.Z. (2002), ‘Multilevel inverters – A Survey of topologies, controls and applications’, IEEE Trans Ind. Electron, Vol. 49, No. 4, pp. 724-737. 58. Rodriguez J., Moran L., Pontt J., Cornea P. and Silva C. (2003), ‘A high performance vector control of an 11-level inverter’, IEEE-Trans Ind. Electron, Vol. 50, No. 1, pp. 80-85. 59. Saleh S.A. and Rahman M.A. (2006), ‘Wavelet-based dynamic voltage restorer for power quality improvement’, Industry Applications Conference, IEEE, Vol.2, pp. 733-740. 60. Sankaran C. (2001), ‘Power Quality’, CRC Press. 61. Sannino and Svensson J. (2000), ‘A series-connected voltage sourconverter for voltage sag mitigation using vector control and a filter compensation algorithm. In Proc. IEEE-IAS, Vol. 4, pp. 24762481. 62. Seng L.Y. (2006), ‘Algorithm for Designing the Size of Energy Storage in Dynamic Voltage Restorer’, First International Conference on Industrial and Information Systems, pp. 46-51. 63. Sng E.K.K., Choi S.S. and Vilathgamuwa D.M. (2004), ‘Analysis of series compensation and DC-link voltage controls of a transformerless self-charging dynamic voltage restorer’, IEEE Transactions on Power Delivery, Vol. 19, pp. 1511-1518. 64. Testing and Measurement Techniques Power Quality Measurement Methods (2003), IEC 61000-4-30. 161 65. Tolbert L.M., Zheng P.F. and Habetler T.G. (1999), ‘Multilevel converters for large electric drives’, IEEE Trans. Ind. Appl., Vol.35, No. 1, p.36. 66. Tounsi R., Michalak P., Pouliquen H. and Foch H. (1997), ‘Series compensator voltage dips: control strategy’, In Proc. 1997 EPE Con., pp. 4.929-4.934. 67. Venkataramanan G. and Wang B. (2004), ‘Dynamic modeling and control of three phase pulse width modulated power converters using Phasors’, in Proc. IEEE 35th Power Electron. Spec. Con., Aachen, Germany, p. 2822. 68. Vilathgamuwa M., Perera A.A.D.R. and Choi S.S. (2002), ‘Performance improvement of the dynamic voltage restorer with closed-loop load voltage and current-mode control’, IEEE Trans. Power Electron., Vol. 17, No. 5, p. 824. 69. Vilathgamuwa M., Wijekoon H.M. and Choi. S.S. (2006), ‘A novel Technique to compensate voltage sags in multiline distribution system – the interline dynamic voltage restorer’, IEEE Trans. Ind. Electron., Vol. 53, No. 5, pp. 1603-1611. 70. Visser A.J., Enslin J.H.R. and Mouton H.D.T. (2002), ‘Transformerless series sag compensation with a cascaded multilevel inverter’, IEEE Trans. Ind. Electron., Vol.49, No.4, pp. 824-831. 71. Wang B. and Venkataramanan G. (2004), ‘Evaluation of shunt and series power conditioning strategies for feeding sensitive loads’, in Proc. 127th Annu. IEEE Appl. Power Electron. Conf., Anaheim, CA, pp. 1445-51. 72. Woodley N.H. (2000), ‘Field experience with dynamic voltage restorer (DVRTMMV) systems’, in Proc. IEEE Power Eng, Soc. Winter Meeting. Conf., Singapore, p. 2864. 73. Wunderlin T., Amhof O., Dahler P., and GuningH. (1998), ‘Power supply quality improvement with a dynamic voltage restorer (DVR)’, International Conference on Energy Management and Power Delivery, pp. 518-525. 74. Youssef K. (2001), ‘Industrial power quality problems Electricity Distribution’, IEE Conf. Pub.1 Vol. 2, p.5.