Whereas the curve "CP-VSG" refers to the PCS with CP-VSG control, and the maximal absolute values of the RoCoF and frequency deviation are reduced to 3.43 Hz/s and 0.44 Hz, respectively.
The curve "Droop" refers to the PCS with the droop control and without any virtual inertia and damping, and the maximal absolute values of the RoCoF and frequency deviation are 5.42 Hz/s and 0.6 Hz, respectively.
The maximal absolute values of the RoCoF and the frequency deviation (as shown in Fig. 15) are reduced to 2.5 Hz/s and 0.31 Hz, respectively.
More precisely, the average (m), the standard deviation (e), and the ratio of the used CPU frequency relatively to the maximal frequency (f) are chosen to characterize each application.
Min.., Max.., MF and stand for Minimal Frequency, Maximal Frequency, Mean Frequency and Frequency of the Maximal Energy, respectively.
where Δfc is the frequency deviation.
The constraint on transient frequency deviation by transient power sags.
The frequency deviation is illustrated in Fig. 11.
The constraint on transient frequency deviation by dispatched power adjustment.
The frequencies of the patterns are normalized by dividing by the maximal frequency, 1,510.
