Patent ID: 8928165
Filing Date: 2015-01-06
Classification: F03D,F05B,G01R,H02P,Y02E

Abstract:
1. A method for fault-tolerant control of a wind turbine including a generator and a generator monitoring subsystem which continuously senses the condition of the generator and provides to the fault-tolerant control system fault management parameters, either as reduced time derivative of stator flux linkage in a faulty stator phase wherein the magnitude of the rotating magnetic flux and/or the magnitude of the torque building current is manipulated in such a way that time derivative of stator flux linkage is kept below the given reduced value at the fault location, or as fault localizing angles θ 1 , θ 2 and the maximum allowed torque T gf at the fault location on the generator magnetic flux circumference wherein said method reduces magnitude T g of the generator torque locally around the fault location such that the fault does not further progress and the energy production is deteriorated as less as possible, said method comprising the following steps: if no generator fault condition is detected, operating said wind turbine in a normal state; and if a generator fault condition is detected, carrying out the steps of: