Supervisory control logic design for Individual Pitch Control

摘要

A big effort in control design has been made in the last years to reduce wind turbine fatigue loads. Individual pitch control is a promising technique and it focuses on reducing fatigue asymmetric loads by pitching each blade individually accordingly to load measurements. Although when compared to a collective pitch controller this strategy is capable of reducing asymmetric fatigue loads, attention must be paid to the corresponding extreme loads as the blades might be pitched at different angles during shutdowns. We investigate here the impact of using this technique on the supervisory logic design in order to limit extreme loads. Moreover we analyse the impact of load sensor failures on the controller performance.