Optimizing Reactive Power Injection with a Single Phase Inverter

[barrymon]

Hello,
I am trying to simulate reactive power injection with a single phase inverter. The constant dc bus voltage on the input side is maintained much higher than 169.71V (considering 120V rms ac output). I have generated the current reference for the control (a PI based system) but it doesn't seem enough. Can anyone there let me know what all factors I should consider? Or is an alternate approach better- like a feed forward compensation? Any help would be appreciated. Has anyone simulated/implemented this previously?

 

[anorlunda]

The constant dc bus voltage on the input side is maintained much higher than 169.71V (considering 120V rms ac output).

That doesn't make much sense. Only the AC side voltages matter.

The higher the AC terminal RMS voltage, the more positive the MVAR generation. It's that simple. You need to feed back the MVAR to a regulator that can vary the AC RMS voltage. PI control is probably sufficient.