I have come across papers that do talk about this by decoupling the positive and negative sequence control loops for the two stages. Be mindful of the neutral current if your controls are not properly implemented.

Voltage-Sourced Converters in Power Systems: Modeling, Control, and Applications

By Amirnaser Yazdani, Reza Iravani

Wiley Pubs.2010

Note that the book has an attachment of corrections that should be checked otherwise you will waste a lot of time.

Thanks for the hint Syed A.Raza.

Thank you Farhad Yazdi, will check that book.

I could not find a proper reference paper for Inner current loop and outer Voltage loop.please share if something you come across.

Finding such a paper is difficult and also easy! You can hardly find the "cascade control" as the main subject of a paper. But there are many papers that use this conventional control as their basic control strategy.

inverters to simultaneously improve the power quality of the inverter local load voltage and the current exchanged with the grid. It also enables seamless transfer of the operation mode from stand-alone to grid-connected or vice versa.

> this is the short ans just start of the point but you referring Qing-Chang Zhong author book so you can understand whole thing's.