Power electronics is the enabling technology for the grid-integration of large-scale renewable energy generation, which provides high controllability and flexibility to energy generation, conversion, transmission, and utilization. However, power electronics also brings several challenges to the conventional power grids, e.g., reducing the system inertia. Advanced control strategies have been developed to enhance the energy conversion process. In this talk, we will walk through the grid-integration structure and control for renewable energy with the focus on large-scale wind, solar photovoltaic, and energy storage systems.