Research on Fault Ride-through Control Strategy for Microgrid with Wind Farms and Storages

As an important distributed power source in the microgrid, wind power generation system brings economic benefits as the penetration rate of wind power increases, which threatens the stable operation of the microgrid. When the grid is faulty, in order to meet the basic requirements of the wind power system not off-grid operation, this paper introduces the battery energy storage system to achieve the purpose of compensating for the grid fault voltage. Firstly, by detecting the degree of voltage transient drop of the grid point after the failure of the distribution network; then, the battery energy storage system in the wind storage combined microgrid system injects appropriate power to support the voltage of the grid point. Finally, the microgrid model is built in MATLABA to simulation verification. The results show that the proposed energy storage control method can effectively support the grid-connected point voltage and effectively measure the power output of the system network to realize the fault voltage traversal of the microgrid.