ÇUKUROVA UNIVERSITY INSTITUTE OF NATURAL AND APPLIED ...

4. MODELING OF PROPOSED DVR Mustafa İNCİ
Firstly, PI control measures
V
dc
and compare it with V dc , ref
(1.7kV
) When
Vdc
below down V dc , ref
(1.7kV
) , PI signal is generated and compared with reference
signal. This process repeated itself continuously. If PI output is greater than reference
signal, reference is equal to reference signal(0.6). If PI output generates lower
magnitude signal than reference(0.6), reference signal is equal to PI output and gate
signals are generated.
Carrier and reference signals generated by PI controller are shown in Figure
4.26.
Figure 4.26. Carrier and reference signals generated by PI controller
Timing diagram with modulation waveforms are presented in Figure 4.27.
Gate signals (S1, S2, S3 and S4) are generated with comparison of reference signal
with carrier.
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