Rotor Current Feedback Based Direct Power Control of a Doubly Fed Induction Generator Operating with Unbalanced Grid

Piotr Pura and Grzegorz Iwański
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Piotr Pura: Faculty of Electrical Engineering, Warsaw University of Technology, 75, Koszykowa St., 00-662 Warszawa, Poland
Grzegorz Iwański: Faculty of Electrical Engineering, Warsaw University of Technology, 75, Koszykowa St., 00-662 Warszawa, Poland

Energies, 2021, vol. 14, issue 11, 1-23

Abstract: The paper presents a decoupled direct power-controlled (DPC) of a doubly fed induction generator (DFIG) connected to an unbalanced power grid, executed in an orthogonal stationary reference frame related to the stator side. The control allows to maintain constant electromagnetic torque despite stator connection to the unbalanced power grid and to achieve controllable low-voltage ride through (LVRT) capability. The control does not require any signal decomposition into positive and negative sequence order, which allows to reduce its complexity and computational requirements. Then, the paper presents positive influence of rotor current feedback in the stator-controlled reference frame on control performance. It facilitates significant transient reduction and minor steady state control improvement. All the mentioned functionalities were validated both in simulation and in laboratory conditions and the obtained results are described in the paper.

Keywords: doubly fed induction generator; direct power control; grid voltage imbalance; unbalanced power grid; power generation; torque ripple cancellation; decoupled control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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