Rotor rotation control system and control method for wind turbine

A rotor rotation control system for a wind turbine, comprising:

• a rotation unit, configured to drive a rotor of the wind turbine to rotate relative to an engine base of the wind turbine;
• a driving unit, configured to drive the rotation unit;
• and
• a processor, configured to determine a bending moment load switching position on a rotating shaft of the rotor, and output an adjustment instruction to the driving unit based on the bending moment load switching position,
• wherein, the driving unit receives the adjustment instruction from the processor and adjusts an operation state of the rotation unit in response to the adjustment instruction to balance a bending moment load change at the bending moment load switching position.