WIND POWER GENERATION SYSTEM AND METHOD FOR CONTROLLING STALL OF THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a wind power generation system capable of stall control having high control response without being enlarged or causing remarkable cost increase.

SOLUTION: The wind power generation system X has a control part C having a function of always extracting an output from the generator 2 in accordance with changes of the number of revolutions of a wind turbine 1.The control part C includes: a stall boundary condition storing means C1 which stores a stall boundary condition determined in advance based on a stall area determined by a relation between output power of a generator 2 and the time differential of the output power; a stall area determination means C2 which calculates the time differential of the output power or the time differential of an output current each time an operation point of the generator 2 is searched, and determines the stall area based on whether or not the relation between the output power in the operation point and the calculated time differential of the output power satisfies a stall boundary condition; and a load releasing means C3 which releases or reduces a load of the generator 2 when the stall area determination means C2 determines the stall area.

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