Frequency Control in Islanded Microgrid

The project has to be made on Matlab Simulink. I want a model design having Microgrid (Preferably Islanded Microgrid), PV system and Battery. Note that I want a simple Simulink model but I need explanation for the making of the overall model. Also as this is my thesis project so I will let you know about the written work for thesis but now at the moment I'm looking for the Simulink model.