ÇUKUROVA UNIVERSITY INSTITUTE OF NATURAL AND APPLIED ...
ÇUKUROVA UNIVERSITY INSTITUTE OF NATURAL AND APPLIED ...
ÇUKUROVA UNIVERSITY INSTITUTE OF NATURAL AND APPLIED ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
4. MODELING <strong>OF</strong> PROPOSED DVR Mustafa İNCİ<br />
4.3.4.1. Inverter<br />
The gating signals in inverter are generated by using modulating techniques.<br />
The most popular modulation techniques are sinusoidal pulse width modulation,<br />
space vector modulation, fuzzy logic controller etc. Sinusoidal Pulse Width (SPWM)<br />
technique is used to generate gate signals in proposed DVR. The gating signals are<br />
generated by comparing a sinusoidal reference with a triangular carrier signal. The<br />
amplitude of carrier signal controls the modulation index and it regulates output<br />
voltage of inverter. The modulation index is expressed as below:<br />
A<br />
A<br />
R<br />
M = (4.52)<br />
C<br />
The switching frequency of solid-state devices in diode clamped multilevel<br />
inverter is selected as 3000 Hz. Two triangular waves for each five-level diode<br />
clamped inverter are compared with two reference signal. Each triangular wave is<br />
compared with error (reference) signal as shown in Figure 4.24.<br />
Figure 4.24. Generation of gate signals for each multilevel five level diode clamped<br />
inverter<br />
79
Change language