Wind turbines are located in remote, hardly accessible locations. Wind turbine generators operate in harsh environment and have 10 times larger failure rate than equivalent insdustrial machines.
Different factors such as moisture, vibrations, power converter pulses or large temperature differences cause generator insulation degradation and ultimately leads to very costly and
time-consuming repairs. These faults develop gradually and can be diagnosed before
they assume catastrophic proportions, making the fault-tolerant control an appealing possibility.
This algorithm prevents the generator fault from further spreading and exploits the wind power at or near the optimum point under emergency circumstances. This reduces potential wind turbine maintenance costs, prolongs wind turbine components life and lets the wind turbine produce
energy also under generator faults.