How to use the power_fftscope function

I use the power_fftscope function to obtain the plot and values of both current and voltage THD, whenever I run the code it displays error, is their any suggestions for any code

Answer 1

[Shlok]

Hi,

I understand that you want to compute and visualize the FFT analysis, including THD, using “power_fftscope”. To achieve the same, follow the following steps:

• First ensure that your data is supplied in a structure with fields like “time”, “signals.values”, and “signals.dimensions”. For example:

ScopeData.time = (0:0.001:1)';  
ScopeData.signals.values = sin(2*pi*50*ScopeData.time); 
ScopeData.signals.dimensions = 1; 

• Pass this data in “power_fftscope” function which will compute and return calculated FFT data. This data can be plotted by passing it in “power_fftscope” function.

FFTDATA = power_fftscope(ScopeData);   
power_fftscope(FFTDATA);   

• The calculated FFT data also containst the THD Value, which you can access using “.THD”.

To know more about “power_fftscope” function, refer to the following MathWorks documentation:

https://www.mathworks.com/help/sps/powersys/ref/power_fftscope.html