electric power 3 phase 230 V dataset analysis

Dear members,

Can anyone help me with analysis of dataset for 3 phase power system with 230 v within 5 minutes ?

The dataset contains following colomns, but it is a bit challanging for me to plot it like a signal such as y=sin(2*pi*f*t). Additionally, wonder how to analyze three phase system. I highly appreciate your kind help in this regard.

7 8 2019 16 35 0 926 230.53 -129.1 230.26 -129.16 231.07 -129.21 49.98 49.98 49.98 -3.29 -3.25 -3.29

7 8 2019 16 35 0 946 230.56 -129.33 230.29 -129.38 231.08 -129.44 49.98 49.98 49.98 -3.29 -3.25 -3.29

7 8 2019 16 35 0 966 230.51 -129.56 230.26 -129.61 230.98 -129.67 49.98 49.98 49.98 -3.29 -3.25 -3.29

7 8 2019 16 35 1 986 230.45 -129.79 230.28 -129.79 231 -129.84 49.98 49.98 49.99 -3.29 -3.25 -3.29

7 8 2019 16 35 1 6 230.42 -130.47 230.13 -130.53 230.88 -130.53 49.98 49.98 49.98 -3.7 -3.7 -3.7

7 8 2019 16 35 1 26 230.53 -130.93 230.34 -130.99 231.12 -131.05 49.98 49.98 49.98 -3.7 -3.7 -3.7

7 8 2019 16 35 1 46 230.49 -131.16 230.22 -131.16 231.11 -131.22 49.98 49.98 49.98 -3.7 -3.7 -3.7

7 8 2019 16 35 1 66 230.57 -131.33 230.27 -131.39 231.06 -131.45 49.98 49.98 49.98 -3.7 -3.7 -3.7

7 8 2019 16 35 1 86 230.55 -131.56 230.51 -131.5 231.11 -131.68 49.98 49.99 49.98 -3.7 -3.7 -3.7

7 8 2019 16 35 1 106 230.5 -131.79 230.2 -131.85 230.98 -131.85 49.98 49.98 49.98 -3.7 -3.7 -3.7

Answer 1

[TED MOSBY]

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!