IMPLEMENTATION OF NEW H- BRIDGE MULTILEVEL INVERTER USING A COMBINATION OF HIGH FREQUENCY AND LOW FREQUENCY MODULATION

Yıl 2014, Cilt: 14 Sayı: 1, 1729 - 1736, 29.09.2014

A. Maheswarı , İ Gnanambal

Öz

This paper proposes a seven level inverter with photovoltaic system, for stand-alone applications with hybrid PWM control scheme. Three carrier signals that are identical to each other which are compared with unidirectional sinusoidal reference signal were used to generate the PWM signals. In this paper, a new topology with a combination of low frequency and high frequency switches is proposed to improve the performance of a multilevel inverter. This topology requires fewer components compared to existing inverters and requires fewer carrier signals and gate drives. Therefore, the overall cost and complexity are greatly reduced. The performance of proposed multilevel inverter with equal dc sources is simulated by using MATLAB platform. Harmonic analysis is done on H-Bridge seven level inverter and experimental results are presented to demonstrate the superiority of the proposed system.

Anahtar Kelimeler

Equal dc sources, Fundamental frequency switching scheme, multilevel inverter, PWM, Total

Kaynakça

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• A.Maheswari was born in
• Tamilnadu, India, on April
• 7, 19 She received her
• B.E degree in Electrical and
• Electronics Engineering
• from V.M.K.V Engineering
• College, Salem, in 2004, the
• M.E degree in Power Elec
• tronics and Drives from Government College of
• Engineering, Salem, in 2008. Currently she is pur
• suing Ph.D. She has presented 7 papers in various
• national and international conferences. She has
• also published six papers in the international jour
• nal. Her current research interests include simula
• tion and control techniques of AC drives, inverter
• topologies and harmonic suppression.
• Dr. I. Gnanambal was born
• in Tamilnadu, India. She re
• ceived her B.E degree in
• Electrical and Electronics
• Engineering from Govern
• ment College of Engineering,
• Salem, in 1981, the M.E de
• gree in Applied Electronics
• in Government College of Technology, Coim
• batore, in 2002 and Ph.D. degree in Networking
• from Anna University, Chennai in 2008. She has
• presented more than 60 papers in various national
• and international conferences. She has also pub
• lished more than fifteen papers in international
• journals. Her research interests include power
• electronics, solid state drives, networking and
• special electrical machines.