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Tuning cascaded PI controllers for voltage and current loops in dq frame

User: "Jayvie Gabriel Templonuevo"
Jayvie Gabriel Templonuevo
Altair Community Member
Updated by Jayvie Gabriel Templonuevo

Hi everyone!

I am working on the voltage and current control loops of an inverter in the dq frame with droop control for the generation of reference. The system is an AC stacked grid connected two stage PV inverter. Do you have suggestions or steps on tuning the PI controllers. Currently, I have followed suggestions of tuning the current first then the voltage but so far, my controllers keep on saturating after some time. I have also tried with a constant DC source first to simplfy the tuning process but the gain values I get as stable with a constant DC source still saturates the PI controllers when used with a PV system. I have no access to SmartCtrl sadly. I have attached my PSIM files below.

PV System.zip

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