Blade load sensing system for a wind turbine

A wind turbine blade, comprising:

• an aerodynamic body;
• and
• a sensor system disposed on the aerodynamic body, wherein the sensor system comprises:
• a load sensor providing a load measurement of blade load on the wind turbine blade;
• a hardware processor interfaced with the load sensor and configured to provide a temperature-corrected load parameter as an output, wherein the hardware processor is configured to:
• determine an estimated temperature of the wind turbine blade in a vicinity of the load sensor based on at least one of:
• a measured temperature of a nacelle of a first wind turbine comprising the wind turbine blade, a measured temperature of a second wind turbine blade of the first wind turbine, or a measured temperature of a second wind turbine;
• and
• determine the temperature-corrected load parameter based on the estimated temperature and the load measurement.

A method for determining a load on a wind turbine blade of a wind turbine, comprising:

• while operating the wind turbine, measuring a load on the wind turbine blade by way of a wind turbine blade load sensor;
• estimating, using a hardware processor, a temperature of the wind turbine blade in a vicinity of the wind turbine blade load sensor based on at least one of:
• a measured temperature of a nacelle of the wind turbine, a measured temperature of a second wind turbine blade of the wind turbine, or a measured temperature of a second wind turbine;
• and
• determining, using a hardware processor and based on the estimated temperature and the measured load, a temperature-corrected value for the load on the wind turbine blade.

A computer program product comprising program code instructions stored on a non-transitory computer readable medium which, when executed by one or more computer processors, performs an operation for determining a load on a wind turbine blade, the operation comprising:

• measuring a blade load by way of a wind turbine blade load sensor;
• modelling a temperature of the wind turbine blade in a vicinity of the wind turbine blade load sensor based on a net heat energy transferred to an interior of the wind turbine blade;
• and
• determining, based on the modelled temperature and the measured blade load, a temperature-corrected value for the load on the wind turbine blade.