Are you trying to find out what a smart grid is? Are you trying to understand the details of how the inverter-based systems respond? Something in-between?
I think you need to specify what area you're looking for info on, because it's a HUGE topic. You might want to search thru some of the many many IEEE documents on the various smart-grid related topics. There's a zillion of them. I like to do simulations using some of the built-in libraries in Matlab/Simulink/Simscape to better understand the performance of solar arrays and inverters, etc.
But it all depends on what you are interested in. Telecommunications? Control systems? Power systems? Disturbance response? and on and on....