How to improve power quality of grid connected Voltage source converter in dc microgrid?

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Mohamed EL-Shimy

Why do not you consider to add passive or active filtering?

Nasreddine Attou

You can use PWM control techniques (selective harmonic elimination, Space vector PWM, etc.).

This method generates the appropriate switching angles whatever the load variation.

Zoheir Tir

I advise you to see the following work :Article An LCL-Filter Design With Optimum Total Inductance and Capacitance

Also, you should respect the determined value of switching frequency as mentioned in the attached paper.

Good Luck

Zoheir TIR