Decoupling control strategy for doubly-fed induction generator the rotor cross-coupling voltage

In a vector-controlled doubly-fed induction generator (DFIG), the cross-coupling voltage between the M and the T components of the rotor current impairs the characteristics of DFIG system. The principle and the deficiencys were analysed for the feedforward and feedback decoupling, and the decoupling control strategy was discussed based on Internal Model Control (IMC). Theoretical analysis and simulation results show that the feedforward decoupling performance is affected by the DFIG parameters and the rotor current deviation, the feedback decoupling is only affected by the DFIG parameters deviation, but the DFIG parameters and the rotor current deviation do not affect IMC decoupling effects, the sensitivity of decoupling effects to the DFIG parameters changes is reduced.