An Enhanced AC Fault Ride through Scheme for Offshore Wind-Based MMC-HVDC System

This study presents an improved, communication-free Fault Ride-Through (FRT) strategy for type-3 and type-4 wind turbine integrated modular multilevel converter-based high-voltage direct current (MMC-HVDC) systems in offshore power plants (OWPPs). The research aims to enhance the reliability resilience of OWPPs by ensuring their connection with AC grids remains intact during after faults. Simulation results conducted on a 580 kV, 850 MW MMC-HVDC system using PSCAD/EMTDC software v.4.6.2 demonstrate quick post-fault recovery operation ability effectively manage DC link capacitor voltages within safe limits. Furthermore, circulating (CC) voltage ripple (CVR) remain acceptable limits, reliable operation. study’s major conclusion is that proposed FRT mitigates adverse effects short circuit faults, such as rapid rise DC-link voltage, performance system. By promptly suppressing overvoltage, scheme prevents compromising various electronics equipment. These findings highlight significance capability emphasize practical applicability enhancing generation.