A design of rural intelligent household micro-grid

Aiming at the reliability of power supply in China's rural areas and the poor quality of power, this paper designs a new household micro-id power supply system, which can widely absorb distributed energy, based on the characteristics of local distributed energy structure. Firstly, the distribution characteristics of the local renewable energy sources and load demand are accurately analyzed to determine the system structure and the capacity configuration of distributed generation. Then, analyze the spectrum of the output power of renewable energy. Based on the analysis, characteristics of energy storage unit and system constraints, determine the optimal capacity of energy storage unit. This system adopts hierarchical control mode, uses the upper scheduling control unit and a remote terminal to manage the whole system, and uses bi-directional inverter to made the micro-grid parallel in and cut smoothly. The design of the new rural household micro grid system is of great significance to the further development of micro-grid.