<p>In a multiple-rotors medium-voltage wind turbine, a small rotor is utilized to drive a permanent magnet synchronous generator in each cell. A cascaded H-bridge inverter is connected to the medium-voltage grid directly without transformers. Advantages such as lower grid connection current, higher reliability and lower cost can be obtained. Maximum wind power capture is achieved with the individual maximum power point tracking control executed in each cell. However, the transmission power unbalance between cells caused by their corresponding different wind speeds leads to overmodulation and deteriorated grid connection current. To address the issue, a novel wind turbine control strategy is proposed in this paper. The wind turbine topology structure and control strategy are presented firstly. A cascaded H-bridge modulation scheme including a flexible power control method is proposed to avoid overmodulation and maintain maximum output power. Simulation and experimental results show that the proposed control strategy is feasible and effective.</p>