Maximum Power Point Tracking of Wound Rotor Wind Generators



Published
A field control method is proposed and investigated whereby maximum power point operation can be obtained from direct DC-grid-connected wound rotor synchronous wind generators (WRSGs).
Using a small DC-DC converter, the field current is optimally controlled according to a unique function of the turbine speed to operate the turbine at its maximum power point. The theory of the method is explained using a per-unit definition and per-unit analysis of the system. The beauty of the proposed control method lies in the simplicity with which maximum power point operation is always obtained. The control method requires no complicated speed and current controllers but only a simple function between turbine speed and duty cycle.
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