How can i simulate a weak grid and also know/ calculate the SCR ratio and X/R ratio?

I need help to to simulte weak grid and know the exact values of the short circuit ratio and and X/R ratio.

how to achieve this using matlab simulation? the grid is already connected to a VSI.

Answer 1

[Sabin]

To achieve the required short circuit ratio and X/R ratio, you need to scale the grid source impedance, transmission line and transformer impedances appropriately. Best place to start is the following example in Simscape Electrical:

https://www.mathworks.com/help/sps/ug/design-analyze-gridforming-converter.html

Additional explanations are provided in the following video:

https://www.mathworks.com/videos/power-converter-circuit-and-control-design-with-simscape-1715762897818.html

[Noha]

Thank you so much for your reply, but i can not open the matlab example model because it was created by 2023 version while i am working on 2018b.

Could you guide me so i can open the simulink using my version of matlab?