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162 From smart grid to internet of energy

FIG. 4.18 Obtaining monitoring results for second load plant, (A) filtering at 400 Hz with second
order, (B) filtering at 200 Hz with second order, (C) filtering at 50 Hz with fourth order.

adjusted as 20 m/s according to the technical parameters of this turbine model. The
outputs of WECS in terms of voltage, current and power signals are illustrated in
Fig. 4.21 in which the output voltage is fixed by the used PI controller in a very
short time as much as 0.04 s. The DC output voltage of buck converter is fed to
the DC coupling bus over inductive loads as can be seen from the Fig. 4.20.