Page 259 - Modern Control of DC-Based Power Systems
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Simulation 223
converge to the same value which is equal to the actual CPL current. As
mentioned in Subsection 5.6.1 the estimates do not necessarily converge
to the true value.
In Figs. 6.5 and 6.6 the ideal CPL was replaced with a PI controlled
buck converter supplying a resistive load. It can be observed that for the
LSF control a bandwidth interaction takes place, since the undershoot is
bigger than in the ideal CPL case.
The Synergetic control shows still the lowest undershoot.
Furthermore, the virtual disturbance control exhibits lower undershoot
than the Adaptive Backstepping; the reason is that this control uses an
ideal CPL model from which the PI-controlled POL already deviates.
With the introduction of a controlled load its bandwidth has now an
Figure 6.5 Voltage—PI CPL—Step 10.3 - 17.8 MW.
Figure 6.6 Voltage and current—PI CPL—Step 10.3 - 17.8 MW.
