Study on Modeling and Simulation of Photovoltaic Energy Storage Microgrid

The operational characteristics of the off-grid microgrid are the basis for studying the operation mechanism and control strategy of microgrid. In this paper, the maximum power point tracking (MPPT) algorithm based on power duty cycle quadratic differential is adopted for the photovoltaic cells. based on the model of photovoltaic cells and lead-acid batteries, At the same time, two kinds of grid control strategies of constant power control (PQ control) and voltage frequency control (V / f control) are analyzed. Based on the model of photovoltaic cell and lead-acid battery, the photovoltaic power generation system and energy storage system are networked to build photovoltaic energy storage microgrid. Finally, the operation characteristics of the photovoltaic energy storage microgrid are simulated and analyzed in Matlab/Simulink, and the correctness of the control strategies is verified.