Comparative study of pulse width modulation techniques for three-level voltage source based on cascaded connection of two-level inverters

Author

Votava, Martin ; Glasberger, Tomas

Author_Institution

Regional Innovation Centre for Electr. Eng. (RICE), Univ. of West Bohemia, Pilsen, Czech Republic

fYear

2015

fDate

20-22 May 2015

Firstpage

729

Lastpage

732

Abstract

The objective of this paper is to give an overview and comparison of control techniques for a three-level voltage source inverter based on dual connection of two-level converters supplied by two independent voltage sources. The compared modulation techniques are based on carrier based PWM, six step and space vector PWM with changeover of the inverters roles from clamping to switching inverter and vice versa. A simulation model of the converter has been designed for comparison of mentioned control algorithms including phase disposition PWM with selected criteria as switching losses, balanced load of switching elements, spectral analysis and THD of the output voltage waveform.

Keywords

PWM invertors; cascade networks; clamps; harmonic distortion; power conversion harmonics; spectral analysis; switching convertors; THD; carrier based PWM; cascaded connection; control algorithms; control techniques; phase disposition PWM; pulse width modulation techniques; space vector PWM; spectral analysis; switching elements; switching inverter; switching losses; three-level voltage source inverter; total harmonic distortion; two-level inverters; voltage waveform; Inverters; Pulse width modulation; Switches; Switching circuits; Transistors; Voltage control; Multi-level inverter; PWM; cascaded connection; dual inverter; sixstep;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Power Engineering (EPE), 2015 16th International Scientific Conference on

Conference_Location

Kouty nad Desnou

Type

conf

DOI

10.1109/EPE.2015.7161163

Filename

7161163