Failure mode and effect analysis and fault modelling of wind turbine for FTC approach

As many wind turbines are installed offshore, a non-planned service can be highly costly, so for this and several other reasons it would be beneficial if fault-tolerant control schemes could help the turbines produce some energy from the time a fault is detected to the next planned service. One of the important steps in fault diagnosis and fault tolerant control approach is evaluation of severity and occurrence of any fault that may change system model and performance. Based on these requirements, in this paper for fault evaluation we use failure mode and effect analysis (FMEA) technique, a table is resulted from this analysis which presents the efficiency of faults. In FTC approach the faulty model of any subsystem is necessary, therefore, beside the fault evaluation, based on fault Effectiveness, abrupt faults of wind turbine are modelled by rewriting the system equation and measurement equation of system, corresponding to the changes enforced by the faults.