How to simulate multiple rooftop solar PVs connected to grid in Simulink?

I need to simulate network control of PV inverters. I am unable to connect multiple PV units to the grid. I started with the built-in model "power_PVarray_250kW.slx" and copied the inverted controlled PV arrray and connected to the grid. I know I cannot just connect two such panels to the grid, but am not sure how to interface the two (or more) units located at different places in the grid to the common grid. Specifically, I am trying to reproduce the results of this paper: https://www.sciencedirect.com/science/article/pii/S0142061519328285. I get negative values of AC power generate for the second PV array. I am new to simulation of power systems, and any help would be appreciated.

[per isakson]

Did you search the File Exchange for solar pv simulink ?

[Laya Das]

Yes, I tried that. The codes available have only one panel (with multiple cells) connected to the grid. What I am lookin for is several of those connected to the grid at different locations.

Thanks

[Laya Das]

I get negative values of active power for the second array. May be this would help in identifying the problem.

Thanks

Answer 1

[Sabin]

Simscape Electrical provides some good examples both in-product and on MATLAB Central. Check out this repository which provides design solutions for the operation of power systems with high penetration of renewable energy sources. The developed models comply with current IEEE/IEC and national grid standards.

https://mathworks.com/matlabcentral/fileexchange/123870-renewable-energy-integration-design-with-simscape

There are also in-product examples in the renewable energy space:

https://mathworks.com/help/sps/renewable-energy.html