Characteristics of Grid-Connected Microgrid PV Energy Storage Power System
In view of the problems in distributed generation,this paper proposes the photovoltaic grid-connected system topology with the function of the energy storage bidirectional converter,and analyzes the working principle of the mathematical model for photovoltaic battery and Bi Buck-Boost two-way theoretical derivation.With the Matlab and Simulink tools,we conduct system control algorithm simulation.By controlling the size and the direction of the energy storage bidirectional converter's inductance values and current values,we achieve the rated power of the battery charge and discharge,complete the grid power's absorption and release,and reduce the impact of the distributed power on grid.Finally the maximum power point tracking algorithm was tested on the experimental platform for 2 kW photovoltaic energy storage grid-connected system,realizing the 95％ conversion efficiency and unit power factor parallel operation.
microgridPV power generationBi Buck-Boost two-way circuitmaximum power point tracking
NETL
NSTL
万方数据
维普
