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 conventional power grids, e.g., reducing the system inertia. Advanced control strategies have been developed to enhance the energy conversion process. In this article, the grid-integration structure and control for renewable energy are discussed with a focus on large-scale wind, solar photovoltaic, and energy storage systems. Future research and development trends for these technologies are also presented.