To solve the faults in high-voltage direct current grid (HVDC grid), hybrid Modular Multilevel Converter (MMC) is adopted to set up a bipolar four-terminal DC grid. The MMC non-blocking operation strategies of unipolar converter fault and DC line fault are designed. During the fault operation, the AC voltage at the grid-connection point is stable and the wind turbine can maintain normal operation. Considering the continuous output wind power in the fault period, an adaptive step-by-step control strategy of dissipative resistance is designed, taking the output wind power as criteria. The excess energy is dissipated by cooperating with the dissipation resistance and chopper resistance inside the direct-drive wind turbine. Finally, the simulation based on PSCAD/EMTDC platform verifies the MMC unblocking fault ride-through operation of hybrid MTDC grid and proves the effectiveness of its fault energy dissipation. This work is supported by National Key Research and Development Program of China (No. 2018YFB0904600) and Science and Technology Project of State Grid Corporation of China “Research on Operation Characteristics and Control Technology of ±500 kV HVDC Grid”.