Power measurement for Three-phase dynamic load

Greetings, I am working on my FYP and stumble upon this problem where I have been getting wierd type of waveform for my power. I want to measure the power for the three-phase dynamic load but it seems to not show a promising results. Let me know if the way I am doing things is correct or not. Thank you (PS: originally I used the Vabc and Iabc signal and connect it to the Power Measurement. The image is just me trying to see if it would give me something).

Answer 1

[akshatsood]

Dear @Muhammad Solihin,

I understand that you are performing Power Measurement for a Three-Phase Dynamic Load and are not obtaining the waveforms as per your expectations.

Since I have limited information about your model and your end goal, it is difficult to debug the root cause of the issue. Please consider sharing your model along with any additional data sufficient to reproduce the issue on my end. This would help me in identifying the locations of the issue and put forward troubleshooting steps.

In the meantime, I recommend consulting the shipped example from MathWorks that demonstrates power measurement for a three-phase dynamic load. Execute the following command in your MATLAB Command Window to open the example (assuming you have MATLAB 2023b or later):

>> openExample('simscapeelectricalsps/DynamicLoadExample')

As a few debugging steps, you can try using the "Scope" and "To Workspace" blocks for visualizing the signal values at various locations within the model. These analyses would be beneficial in identifying the part where it goes wrong.

For more information on the "Scope" block, refer to the following documentation link.

https://www.mathworks.com/help/simulink/slref/scope.html

As a sanity check, consider reviewing the following set of parameters:

1. Phase Sequence of "Vabc" and "Iabc" Signals: Ensure that the phase sequence of both signals is correct.
2. Step Size: Choose an appropriate step size, as setting it too small or too large can lead to incorrect results. An optimal step size is crucial for maintaining the accuracy and efficiency of the simulation.
3. Load Parameters: Verify the load parameters, as an unbalanced load can lead to improper waveforms.

For selecting the correct step size, I recommend referring to the following documentation for a better understanding:

https://www.mathworks.com/help/simscape/ug/choose-step-size-and-number-of-iterations.html

I hope this helps.