THD Analysis of Cascaded Mli for Various PWM Techniques

THD Analysis of Cascaded Mli for Various PWM Techniques

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2014 by IJETT Journal
Volume-11 Number-3                          
Year of Publication : 2014
Authors : K.L.Dheeraj , M.Diwakar , M.DurgaRaj , M.Eswar , K.Naga Venkatesh
  10.14445/22315381/IJETT-V11P228

Citation 

K.L.Dheeraj , M.Diwakar , M.DurgaRaj , M.Eswar , K.Naga Venkatesh. "THD Analysis of Cascaded Mli for Various PWM Techniques", International Journal of Engineering Trends and Technology (IJETT), V11(3),146-149 May 2014. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract

Cascaded inverters are ideal for connecting renewable energy sources with an AC grid, because of the need for separate dc sources, which is the case in applications such as photo voltaics or fuel cells. The inverter could be controlled to either regulate the power factor of the current drawn from the source or the bus voltage of the electrical system where the inverter was connected. The modulation techniques are crucial in operating any inverter at desired conditions. In this paper different pwm techniques are implemented for three level and five level cascaded mli and THD variation is analysed with variation of modulation index.

References

[1] Muhammad H. Rashid, Power Electronics Circuits, Devices, and Applications, third edition, 2003.
[2] Ned Mohan, Power Electronics, Converters, Applications and Design, third edition,2006.
[3] Grath and Holmes, "Multicarrier PWM strategies for multilevel inverters," IEEE Trans.
[4] Carrara, Gardella, Marchesoni" and G. Sciutto,"A new multilevel PWMmethod: A theoretical analysis,"IEEE Trans.Power Electron., vol. 7, no. 3, pp. 497-505, Jul. 1992.
[5] Rodriguez, B. Wu, S. Bernet, J. Pontt, and S. Kouro, "Multilevel voltage-source-converter topologies for industrial medium-voltage drives," IEEE Trans. Ind. Electron., vol. 54, no. 6, pp. 2930-2945, Dec. 2007.

Keywords
cascaded mli, modulation techniques, modulation index, total harmonic distortion.