To address onshore AC faults in MMC-HVDC integrated offshore wind farms (OWF-MMC-HVDC), this chapter introduces a Multi-mode Matching Control (MMMC) strategy, which operates across three distinct modes. In Mode I, Active Energy Control is deployed during severe faults when the MMC’s ability to output reactive power is constrained. This mode utilizes the energy stored in the MMC sub-modules (SMs) to absorb surplus offshore power, thereby preventing DC overvoltage. In Mode II, Dynamic Reactive Current Optimization (DRO) Control is applied during moderate faults. This mode dynamically adjusts the MMC’s active and reactive current commands within acceptable limits, providing voltage support to the onshore grid and maximizing offshore active power output, which in turn reduces surplus offshore power. In Mode III, Energy Coordinated Synchronous (ECS) Control is implemented for milder faults. This mode simultaneously manages the energy absorption rates of both the WFMMC and the GSMMC, effectively using the energy margins of the MMCs to support the onshore grid while maintaining fault ride-through capability. The accuracy and effectiveness of the MMMC strategy are validated through simulations conducted on the PSCAD/EMTDC platform.