How do I create a custom three-phase Varying Load?

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Alexander Galvin
Alexander Galvin 2024-11-20，1:35
编辑： Vinay 2024-11-21，5:49
I am trying to create a three phase varying load, in Simscape Electrical, with either the Three-Phase Dynamic Load or the Wye-Connected Variable Load. It seems that the type of PQ signal that the Three-Phase Dynamic Load block can take in is in compatable with the kind of load varation data, I am trying to input. I want to mimic the average daily load fluctuation of a household. Different power demand at different times of the day. Is there a way to make this work with the Three-Phase Dynamic Load? If not, is there a way to make the black lines be compatable with the blue lines so the Wye-Connected Variable Load can be connected to the system? Or is there an entierly different way thats better than both?
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Vinay
Vinay 2024-11-20，4:40
Thanks @Alexander Galvin for the model file.
I also need the file 'C:\DieselGeneratorProject\DynamicLoad.mat' used in the signal editor block

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Vinay
Vinay 2024-11-21，5:47
编辑：Vinay 2024-11-21，5:49
Hi @Alexander Galvin
The "Three Phase Varying Load" is modeled using the Three Phase Dynamic Load block, where the active and reactive power are functions of the positive sequence voltage.
This dynamic load allows external control of the 'PQ' parameter by providing a vector composed of two signals: [P Q]. In Simulink, you can combine the time series data of 'P' and 'Q' into a vector using the 'Mux' block as shown in the below figure
The Simscape Electrical Specialized Power Systems blocks (3- phase lines) can be connected to the Simscape Electrical blocks (wye connected variable load) using the ‘Current-Voltage Simscape Interface’ block. The MATLAB answer provided below elaborates on how to use this block.
https://in.mathworks.com/matlabcentral/answers/1851713-how-can-i-convert-between-simscape-electrical-and-simscape-specialized-power-systems-domains?s_tid=answers_rc1-1_p1_Topic
Here are the relevant documentation links for the R2024b version:
Hope this would resolve the issue!

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