METHODS FOR MONITORING WIND TURBINES

摘要

Monitoring method of a variable speed wind turbine (11) comprising control means for a pitch regulation tracking a power vs. generator speed curve (21) in function of the wind speed expressed by a transfer function (TF) applied to the wind speed measured by a wind sensor placed in a location where the wind flow is disturbed, that comprises the following steps: a) providing an optimum relationship function (F1) between a wind speed dependant variable (V) such as the blade pitch angle, and a wind turbine performance variable (P) such as the generator speed; b) measuring continuously said variables (V, P) and obtaining a relationship function (F2) between them; c) obtaining continuously a parameter (D) indicative of the differences between said relationship functions (F1, F2); d) generating a warning message when the value of said parameter (D) is greater than a predetermined value.