Research on Control Strategy of Large Offshore Wind Power Generation System

This paper introduces the control strategy of a 6MW large-scale offshore wind power generation system from wind energy capture to grid connection. Firstly, this paper introduces the overall structural parameters of a 6MW large offshore wind turbine. According to the special wind conditions at sea, the author designs the maximum power output strategy of wind turbines based on the control method of optimal tip speed ratio to deal with the problem of the limited output power of wind turbines in complex sea conditions and maximize the utilization rate of the wind turbine. To address the difficulties in the operation control of the 6MW permanent synchronous generator, the author designs a space vector pulse modulation control strategy based on rotor magnetic field orientation, which reduces the harmonic content of the generator current and enhances the robustness of the current loop. Through simulation analysis, it can be seen that the designed maximum power output strategy of wind turbines can maximize the utilization rate of wind energy. Through the adjustment of space vector modulation control method, the speed of permanent magnet synchronous generator system meets the design requirements and the output power reaches the designed power level. The wind speed shear process is added to the simulation process, and the whole system can be quickly stabilized after self-adjustment, which proves the effectiveness of the control strategy.