Monitoring system and a monitoring method for a wind turbine generator

A monitoring system for a wind farm, comprising:

• a wind speed obtaining unit for obtaining a wind speed for each of wind turbine generators belonging to the wind farm;
• a wind condition identifying unit for identifying a wind condition parameter for each of the wind turbine generators based on the wind speed obtained by the wind speed obtaining unit and at least one of a power output or a pitch angle of each of the wind turbine generators measured upon occurrence of the wind speed, the wind condition parameter including at least one of a wind shear or an upflow angle of a wind which acts on a rotor of each of the wind turbine generators;
• and
• a fatigue load calculating unit for calculating a fatigue load of a component of each of the wind turbine generators based on at least the wind condition parameter identified by the wind condition identifying unit and a wind turbulence intensity of the wind which acts on the rotor.

A monitoring method for a wind turbine generator, comprising:

• a wind speed obtaining step of obtaining a wind speed;
• a wind condition identifying step of identifying a wind condition parameter which includes at least one of a wind shear or an upflow angle of a wind which acts on a rotor of the wind turbine generator based on the wind speed obtained in the wind speed obtaining step and at least one of a power output or a pitch angle of the wind turbine generator measured upon occurrence of the wind speed;
• and
• a fatigue load calculating step of calculating a fatigue load of a component of the wind turbine generator based on at least the wind condition parameter identified in the wind condition identifying step and a wind turbulence intensity of the wind which acts on the rotor.