Page 112 - Modern Control of DC-Based Power Systems
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76 Modern Control of DC-Based Power Systems
Figure 2.51 Bode plot of the identified output impedance of the source converter com-
pared to the analytic transfer function with the Digital Network Analyzer technique.
Figure 2.52 Voltage and current measurements at the impedance measurement
point with the Wideband System Identification technique.
which is f sw =2 5 10kHz in this example. As a concluding remark, the
WSI is able to excite many more frequencies in the system than the digital
network analyzer technique in half of the injection time. This is a practical
advantage in stability analysis applications due to the strict requirement of
fast impedance measurements over a wide frequency range.
