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Hybrid fast damping control strategy for doubly fed induction generators against power system inter-area oscillations

journal contribution
posted on 24.01.2019, 00:00 by K Liao, Y Xu, Y Wang, Z He, Hesamoddin Marzooghi
Here, a hybrid fast damping control strategy based on bang-bang modulation is proposed for doubly fed induction generators (DFIGs) against inter-area oscillations. Since the changes in active power modulation of DFIG may result in its interactive effect with torsional oscillations, this study relies on the modulation of DFIG reactive power to rapidly attenuate the system's critical oscillation mode. In order to overcome the buffeting of the bang-bang modulation, the proposed control strategy is designed as a hybrid scheme consisting of three operating modes which are switched based on the amplitude of the detected critical oscillation mode. The required lead phase for the proposed control strategy is determined using frequency domain analysis using detailed dynamic model of the DFIG. A comprehensive test is carried out by conducting simulation studies on a modified two-area system including an aggregated wind farm. It has been shown that the proposed strategy damps inter-area oscillations much quicker than the conventional continuous damping controller. Simulation results also showed that the control scheme is robust to the operation point variation and identification errors for practical application.

History

Volume

12

Issue

4

Start Page

463

End Page

471

Number of Pages

9

eISSN

1752-1424

ISSN

1752-1416

Publisher

IET, UK

Peer Reviewed

Yes

Open Access

No

Acceptance Date

16/12/2017

External Author Affiliations

Southwest Jiaotong University, Southwest Minzu University, China; Nanyang Technological University, Singapore

Era Eligible

Yes

Journal

IET Renewable Power Generation