Flow power plant having pivoting blades

A flow power plant comprising

• a rotor configured to rotate about a rotational axis;
• a plurality of rotor blades, each of the plurality of rotor blades configured to rotate about a respective pitch axis parallel to the rotational axis between a first position where the rotor blade is pivoted toward the rotational axis and a second position where the rotor blade is pivoted away from the rotational axis;
• a plurality of electric machines mounted to the rotor, each of the plurality of electric machines being operably connected to a respective one of the plurality of rotor blades and configured to apply or receive a torque about the respective pitch axis of the respective one of the plurality of rotor pivoting blades;
• a controller configured to individually control a pitch angle of each of the plurality of rotor blades;
• wherein each of the plurality of electric machines is operable as a motor and a generator;
• and
• wherein the controller is configured to individually control each of the plurality of electric machines such that each of the plurality of rotor blades pivots along a respective determined trajectory from the first position to the second position, the respective determined trajectory being determined for each revolution of the rotor.