Control Strategy for Potential vector remolding Fault ride-through in Gird-Forming MMC

The traditional fault ride-through strategy, when combined with grid-forming control, has the issue of large transient current surges and slow reactive power support response during the switching of strategies before and after faults. Consequently, we propose control strategy for potential reconfiguration within low-voltage ride-through of offshore wind power receiving end grid. By analyzing the short-circuit current characteristics of the grid-forming modular multilevel converter during main grid voltage drops, establish fault traversal current limiting boundaries based on the voltage equation space vector of the grid-forming modular multilevel converter. Through current optimization instructions, reconstruct internal potentials. Finally, the proposed fault ride-through strategy is validated through experiments on the semi-physical experimental platform.