An efficient pulse width modulation scheme for Cascaded HBridge inverter (CHBI) is proposed in this paper. The proposed modulation scheme is a low switching frequency modulation scheme termed as modified Nearest Level Modulation (mNLM) scheme. Compared to the conventional nearest level modulation (NLM) scheme, the proposed modulation scheme reduces the total harmonic distortion (THD) at the ac output of the inverter. The mNLM follows an algorithm presented in the paper in order to arrive at a set of switching angles for MLI which offers reduced THD. Simulation is carried out using MATLAB/Simulink 2015b software and hardware is presented which validates the simulation results. Results show that there is a notable reduction in the THD content with the use of proposed modulation scheme. Because of the improved THD content, improvement in the other inverter parameters such as rms voltage, rms current and increased output power is also observed.
Primary Language  en 

Subjects  Engineering 
Journal Section  Electrical & Electronics Engineering 
Authors 

Dates 
Publication Date: June 1, 2019 
Bibtex  @research article { gujs469820,
journal = {GAZI UNIVERSITY JOURNAL OF SCIENCE},
issn = {},
eissn = {21471762},
address = {Gazi University},
year = {2019},
volume = {32},
pages = {471  481},
doi = {},
title = {A Modified Nearest Level Modulation Scheme for a Symmetric Cascaded HBridge Inverter},
key = {cite},
author = {KUMAR, Rakesh and THANGAVELUSAMY, Deepa}
} 
APA  KUMAR, R , THANGAVELUSAMY, D . (2019). A Modified Nearest Level Modulation Scheme for a Symmetric Cascaded HBridge Inverter. GAZI UNIVERSITY JOURNAL OF SCIENCE, 32 (2), 471481. Retrieved from http://dergipark.org.tr/gujs/issue/45480/469820 
MLA  KUMAR, R , THANGAVELUSAMY, D . "A Modified Nearest Level Modulation Scheme for a Symmetric Cascaded HBridge Inverter". GAZI UNIVERSITY JOURNAL OF SCIENCE 32 (2019): 471481 <http://dergipark.org.tr/gujs/issue/45480/469820> 
Chicago  KUMAR, R , THANGAVELUSAMY, D . "A Modified Nearest Level Modulation Scheme for a Symmetric Cascaded HBridge Inverter". GAZI UNIVERSITY JOURNAL OF SCIENCE 32 (2019): 471481 
RIS  TY  JOUR T1  A Modified Nearest Level Modulation Scheme for a Symmetric Cascaded HBridge Inverter AU  Rakesh KUMAR , Deepa THANGAVELUSAMY Y1  2019 PY  2019 N1  DO  T2  GAZI UNIVERSITY JOURNAL OF SCIENCE JF  Journal JO  JOR SP  471 EP  481 VL  32 IS  2 SN  21471762 M3  UR  Y2  2019 ER  
EndNote  %0 GAZI UNIVERSITY JOURNAL OF SCIENCE A Modified Nearest Level Modulation Scheme for a Symmetric Cascaded HBridge Inverter %A Rakesh KUMAR , Deepa THANGAVELUSAMY %T A Modified Nearest Level Modulation Scheme for a Symmetric Cascaded HBridge Inverter %D 2019 %J GAZI UNIVERSITY JOURNAL OF SCIENCE %P 21471762 %V 32 %N 2 %R %U 
ISNAD  KUMAR, Rakesh , THANGAVELUSAMY, Deepa . "A Modified Nearest Level Modulation Scheme for a Symmetric Cascaded HBridge Inverter". GAZI UNIVERSITY JOURNAL OF SCIENCE 32 / 2 (June 2019): 471481. 
AMA  KUMAR R , THANGAVELUSAMY D . A Modified Nearest Level Modulation Scheme for a Symmetric Cascaded HBridge Inverter. GAZI UNIVERSITY JOURNAL OF SCIENCE. 2019; 32(2): 471481. 
Vancouver  KUMAR R , THANGAVELUSAMY D . A Modified Nearest Level Modulation Scheme for a Symmetric Cascaded HBridge Inverter. GAZI UNIVERSITY JOURNAL OF SCIENCE. 2019; 32(2): 481471. 