Research on energy micro grid control system based on the structure of FREEDM

Recent years, solar energy and wind energy, the most common new energy sources, have becoming the most important ways of distributed generations. FREEDM system is an Energy Internet model which is proposed by Professor Alex Q. Huang from North Carolina State University and solid state transformer (SST) is the core of it. Based on the concepts of photovoltaic (PV) power generation, wind power generation, energy storage technology and FREEDM system, this paper presents an energy micro grid control system based on the structure of FRDDEM. With the help of Matlab/Simulink software, we have built the models of inverter, PV array, wind turbine, storage device, and filter. We use SVPWM control technology to obtain the simulations of islanding operation mode and grid-connected operation mode.