Renewables are heavily involved in power generation, as an essential component for today’s energy paradigm. Energy structure—both national and international—has been undergoing significant changes over the past few decades. For instance, in Denmark, power generation is shifting from fossil-fuel-based to renewable-based in terms of energy sources, from centralized to decentralized in terms of architectures, and from sole to miscellaneous in terms of energy varieties . In this energy evolution, the power electronic technology plays an enabling role in the integration and advancements of renewables—such as wind turbine, photovoltaics, fuel cells, and other emerging energy systems. At the same time, various control strategies are necessary to guide the energy integration (i.e., to enhance the energy transition), and on the other hand, to flexibly, reliably, and efficiently utilize the energy. Tremendous application-driven power converters and control techniques for grid-connected renewables have been developed and more are coming into market to further secure the renewable power generation. Stringent demands from both utility system operators and consumers have also been (and are being) imposed on grid-connected renewable generation systems.