论文信息 - Optimal active and reactive power control with the doubly-fed induction generator in the MW-class wind-turbines

Optimal active and reactive power control with the doubly-fed induction generator in the MW-class wind-turbines

In this work control strategies for a wind generation system are studied. A wound rotor induction machine is used with two back-to-back converters on the rotor circuit in a slip power recovery scheme. The slip control results in an operating speed range that suits the wind energy generation requirements. The vector-controlled doubly-fed induction generator (DFIG) enables the decoupling between active and reactive power as well as between torque and power factor. Therefore, besides the optimal speed tracking for maximal wind energy conversion, an optimal control strategy for the two converters is developed. This strategy aims to minimise the electrical losses, hence optimising the system overall efficiency. The proposed scheme is based on the splitting of the reactive power flow in the system and allows imposing the net power factor in a range from -0.9 leading to -0.9 lagging.

W. Hofmann | B. Rabelo | W. Hofmann | B. Rabelo

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