Hybrid fast damping control strategy for doubly fed induction generators against power system inter-area oscillations
Date of Issue2017
School of Electrical and Electronic Engineering
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.
Power Generation Control
IET Renewable Power Generation
© 2017 The Institution of Engineering and Technology (IET). This paper was published in IET Renewable Power Generation and is made available as an electronic reprint (preprint) with permission of The Institution of Engineering and Technology (IET). The published version is available at: [http://dx.doi.org/10.1049/iet-rpg.2017.0196]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.