Coordinated Low-voltage Ride-through Control Strategy for Multiport Magnetic Network Energy Routers-based Grid-connection System

Multiport magnetic network energy routers (MNERs) are a key technology in the energy internet that can improve the consumption level of renewable energy, realize the integration of source-grid-load-storage, and ensure the stable operation of power systems. However, the power grid may break down, causing the grid currents to exceed the safe threshold and the DC bus voltages to fluctuate, thereby threatening the stability of the power system. A coordinated low-voltage ride-through (LVRT) control strategy for an MNER-based grid connection system is proposed. The proposed control strategy can provide significant LVRT capability for an MNER-based grid-connection system and maintain the DC bus voltage of each port at the rated value. A simulation is conducted using the PLECS platform, and the results validate the effectiveness of the proposed coordinated LVRT control strategy.