I am currently working on integration of PV with grid.In simulation i have designed a current conttoller based on idref and iqref.But in simulation the id value is properly traking to the id ref value but at the out put of inverter the three phase current is not sinusoidal also the value of igrid not changing according to the reference value of iderf.Can any body have any idea to solve the above issues.I am attaching the responce of inverter output current.
As per the question, I understand that you have used SRF method. The issue might be with the controller parameters. Try re-tuning them and verify.
this issue can be resolved by the correct use of filter at the output of the inverter. You need to check the value of L and R of the filter correctly. Then this issue will be resolved.
Thanks to Mr Amit And Mr Hema Chander .But i have already retuned the controller and also changing the values of filter values.still there is no improvement on current
Yes i have already connected Capacitor wth value 10 micro Farad as filter
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