Abstract
Energy Internet (EI) is the energy network based on the power system and information architecture. With the access of the renewable energy power generation equipment, energy storage device and various types of power load to power grid, the traditional power system equipment can't meet the diversity of power supply, energy multi-directional flow, active management of power flow and other requirements. How to use the advanced power electronics technology has become the core of the effective control to EI. The state of art of EI at home and abroad is introduced firstly, and the concepts and research progress of EI in different countries are compared in this paper. Then the application status of power electronic technology in EI is introduced. The working principle and function of three important power electronic devices are mainly introduced, which consists of solid state transformer (SST), energy router, and energy switch. Finally, the future development trend of power electronic technology is pointed out based on the analysis of the existing research results at home and abroad.
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