Hello
In Simulink MATLAB, we have a three-phase microgrid that we want to improve its power quality with the help of a three-phase inverter and adding a proportional-resonance controller to the system. But we don't know how to implement the proportional-resonance controller in the Z domain (discrete time); We have tried many ways and failed; Please advise what are the ways to design the proportional-resonance controller in the discrete time domain?
Thanks
Dear Homayoun,
You can use Tustin’s method for time discretization. (To convert the Laplace form to the z form). Then you could use this hint that (z^-1)*x(n) is equal to x(n-1). I have written the method to implement discrete form of PR controller on the Simulink for you in the attached PDF. Please recheck it. Moreover, the link (https://imperix.com/doc/implementation/proportional-resonant-controller) is also helpful.
Best Regards
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