Abstract
In this paper the control system for variable speed grid-connected doubly-fed induction generator (DFIG) is addressed, which is dedicated for natural gas-fired generation system. The control system features active and reactive power controller, negative-sequence compensation controller, and rotor position phase locked loop (PLL). The proposed active and reactive power controller is independent of the DFIG parameters, while having good dynamical performance similar to that of the decoupled P-Q controller. The negative-sequence compensation controller improves the output power quality by eliminating the negative-sequence component in the stator current. The rotor position PLL achieves sensorless control. Simulation and experimental results are provided for a 1.1 kW prototype DFIG.
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