Ice detection method and system for wind turbine generators using sun radiation sensors

摘要

The present invention defines a system and method aiming at measuring the direct solar radiation received by a wind turbine generator in order to detect ice formation. The measured value is subsequently compared to a theoretical radiation curve wherein measured values on a cloudy day will be well below theoretical curves. Ice detection is made considering the presence of clouds and temperature. Measured parameters are preferably the direct sun radiation transmittance and ambient temperature.

主权项

1. An ice detector system for a wind turbine generator (4), comprising:
at least a temperature input for a signal representing the ambient temperature (2) at the location of said wind turbine generator (4), wherein the ice detector system further comprises: at least a direct sun radiation sensor (1) located at or on said wind turbine generator (4), and transmittance calculation means for calculating a parameter related to a direct sun radiation transmittance value based on a measured direct sun radiation value (5) and a predetermined reference value, and ice detection means for generating an ice detection signal based on said transmittance value and said ambient temperature (2) at the location of said wind turbine generator (4).