I have developed a script to calculate the power fluctuation of a PV power plant. Basically, I'm calculating the magnitude of the power fluctuation dP, at an instant t, for a sampling period dt, as the difference between two power outputs, normalized to the nominal power Pnom of the plant, as follows:
dP( t ) = [ P( t + dt ) - P( t ) ] / Pnom.
I'm exporting 300 seconds of data from simulink to workspace and I want to plot relative frequency histograms for different sampling periods dt. Longer sampling timte dt implies in a smaller number of data inside this 300 seconds. So, i.e., for dt = 1 second I have 299 samples, for dt = 20 seconds, I have 280 samples. I have already calculated the power fluctuation dP( t ) and it can be observed in the figure below:
The vertical axis describe the percentual power fluctuation and these values can be larger sometimes. I want to plot a figure that describes the relative frequency of these power fluctuations. The figure below (I took from a paper) represents the relative frequency plots I want to apply to my data.
I appreciate any help!