Fault‐tolerant individual pitch control of floating offshore wind turbines via subspace predictive repetitive control

Individual pitch control (IPC) is an effective and widely used strategy to mitigate blade loads in wind turbines. However, conventional IPC fails cope with actuator faults, this situation may lead emergency shutdown increased maintenance costs. In paper, a fault-tolerant individual (FTIPC) scheme developed accommodate these faults floating offshore turbines (FOWTs), based on Subspace Predictive Repetitive Control (SPRC) approach. To fulfill goal, online subspace identification paradigm implemented derive linear approximation of the FOWT system dynamics. Then, repetitive law formulated attain load mitigation under operating conditions, both healthy faulty conditions. Since excitation noise for interfere nominal power generation turbine, novel technique restrict at specific frequencies. Results show that significant reductions are achieved by FTIPC, while effectively accommodating restricting energy persistently exciting action.