"Modelling option" for RLC (Three-phase) non-existent

Power systems simulations onramp 2.1, Blocks, Task 4 requires you to change the "Modelling option" of a RLC (Three-phase).

Given images in the onramp it seems that in the past the "Modelling option" used to exist but now it has been replaced with "Electrical connection" (as shown in picture below).

However dispite the option no longer existing, the onramp will not let you proceed unless you have changed the "Modelling option" which is not possible.

If anyone can be of any help please let me know.

Answer 1

[Vinay]

Hii @Robert Clancy,

The 3-phase RLC block offers two modeling options: 'composite three-phase' and 'expanded three-phase'. The 'composite three-phase' ports represent three individual electrical conserving ports with a single block port and 'Expanded three-phase ports' represent the individual phases of a three-phase system using three separate electrical conserving ports.

However, connecting 'RLC block' with expanded port to a voltage source modeled as a 'composite' system results in an error. The issue can be resolved by changing the modeling option of the RLC block to 'composite three-phase' in the electrical connection settings.

Kindly refer to the below documentation of “RLC three phase” for more details:

https://in.mathworks.com/help/sps/ref/rlcthreephase.html

I hope this helps!

Answer 2

[Abinash U]

Change the Modeling option of the RLC (Three-Phase) block to Expanded three-phase ports.

Connect the a, b, and c phases of the blocks Voltage Source (Three-Phase) and RLC (Three-Phase).

Add a Phase Splitter block and use it to connect the RLC (Three-Phase) block to the Grounded Neutral (Three-Phase) block.

When you Submit your model, you can see that the configuration does not affect simulation values.