This work deals with a carrier based
sinusoidal pulse width modulation strategies for three phase seven level
cascaded H-bridge multilevel inverter. Sawtooth and triangular carriers are
presented with the different reference signals i.e. sinusoidal reference, third
harmonic injected sinusoidal reference and trapezoidal reference. Various
modulation strategies like Phase Disposition PWM, Phase Opposition Disposition
PWM and Alternate-Phase Opposition Disposition PWM are implemented for
different reference signals.
The
various arrangements of sawtooth and triangular carriers are implemented based
on the three different carrier arrangement techniques such as constant frequency,
variable frequency and carrier overlapping. The comparison table of %THD
content has also been included for different modulation index of each reference
signal with various modulation strategies based on the different arrangements
of the carriers. The work has been carried out and tested in MATLAB/SIMULINK
platform and %THD present in Phase Voltage and Line Voltage for three different
reference signals has also been studied as well.
Primary Language | English |
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Journal Section | Electrical & Electronics Engineering |
Authors | |
Publication Date | September 28, 2018 |
Submission Date | June 18, 2018 |
Published in Issue | Year 2018 Volume: 5 Issue: 3 |