Direct power control and stator flux vector generator system for wind energy conversion

摘要

Method for generating a reference vector stator flux Ψ * s for controlling a generator (11, 51, 71) comprising a stator and a rotor, said method comprising: determining a first vector component reference stator flux Ψ * s1 corresponding to a magnetization flux Ψ mag of a desired magnitude for the generator (11, 51, 71), determining a magnitude of a corresponding equivalent current to a stator flux producing power and / or torque Ψ torque a desired magnitude for the generator, determine an actual stator current | is | and limiting the magnitude of the equivalent current if the current actual stator is above a predefined threshold (Ismáx), determining a second vector component reference stator flux Ψ * s2 = Is · Ls based on the equivalent current limited, and determine a reference vector stator flux Ψ * s based on the reference vector components of the first flow and the second stator