Hi Jan,
To analyze a dataset for 3 power system I have used a dummy data as your data had only 10 samples over 9 seconds. Here I have:
- Created three-phase signals with 120° phase shift.
- Plotted the time-domain waveforms.
- Computed and ploted an FFT.
- (Optional for analysis) computed symmetrical components.
I have attached a MATLAB script for reference. Feel free to adjust it according to your use case.
After running the script you will see:
Time-Domain Plot
- Three sine waves (Phase A, B, C) each shifted by 120°.
- All have an amplitude of about 230 V.
FFT Plot
- A clear peak at 50 Hz for Phase A.
- Very small or no significant harmonics at other frequencies in this case.
Symmetrical Components
- Zero sequence (V0) near zero because the three phases sum to zero at every instant for a perfectly balanced system.
- Positive sequence (V1_seq) around 230 V (the dominant component).
- Negative sequence (V2_seq) near zero because the phases are perfectly balanced (no negative-sequence component).
Hope this helps!
