Wind turbine rotor balancing method, associated system and wind turbine

A wind turbine rotor balancing system, the wind turbine comprising a set of components including a rotor which comprises at least two blades, wherein the system comprises:

• means for identifying a reference angular position for each of the at least two blades;
• first means for calculating a magnitude, mx, of rotor imbalance based on a mass, MiT, of each of the at least two blades with respect to a centre of the rotor;
• second means for calculating a phase, φx, of rotor imbalance;
• and
• balancing means, wherein said balancing means are configured to act at least if the phase, φx, of rotor imbalance lies outside a permissible angular range relative to the reference angular positions.

A wind turbine balanced by a balancing method comprising the following steps:

• a step of identifying a reference angular position for each of the at least two blades;
• a step of calculating a magnitude, mx, of rotor imbalance based on a mass, MiT, of each of the at least two blades with respect to a centre of the rotor;
• a step of calculating a phase, φx, of rotor imbalance;
• and
• a balancing step, wherein the balancing step is carried out at least if the phase, φx, of rotor imbalance lies outside a permissible angular range relative to the reference angular positions;
• wherein the wind turbine comprises a rotor which comprises the at least two blades, wherein each of the at least two blades comprises the mass, MiT, wherein the rotor comprises the calculable magnitude, mx, of rotor imbalance and phase, φx, of rotor imbalance, wherein the phase, φx, of rotor imbalance is within the permissible angular range relative to at least one longitudinal direction of one of the at least two blades.