Three phase time varying load

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Othman Alkandri
Othman Alkandri on 7 Jul 2022
Answered: Joel Van Sickel on 1 Aug 2022
I am trying to do three pahse varying load with respect to time. I used singal builder to set the data of my load, then I used varrying resistor to give the load singal to it. However I am revicing errors >>>
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Block 1: 'Unonlinearelement_Variable Resistor/SrcI' Block 2: 'phase_C: Three-Phase Source' The first block, modeled as a current source, cannot be connected in series with the inductive element of the second block. Add a high-value resistance in parallel with one of the two block. You can also specify high-value resistive snubbers if the blocks have a snubber device.You can avoid the use of the snubber by selecting the 'Continuous' simulation type in the Solver tab of the Powergui and deselecting the 'Disable ideal switching' option in the Preferences tab of Powergui block.
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Answers (1)

Joel Van Sickel
Joel Van Sickel on 1 Aug 2022
The issue is how your circuit is set up. You need a snubber resistor to ground (for all three phases) because you can't have two components modelled as current sources in series with each other. If you use Simscape instead of specialized power systems, you don't have to worry about this. (use the blue circuit components, not the black ones)
Simscape also has variable three phase loads.
Regards,
Joel

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