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Energies 2017, 10(8), 1206; doi:10.3390/en10081206

A Comparison between Voltage and Reactive Power Feedback Schemes of DFIGs for Inter-Area Oscillation Damping Control

1,* and 2
School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
College of Electrical and Information Engineering, Southwest Minzu University, Chengdu 610041, China
Author to whom correspondence should be addressed.
Received: 4 June 2017 / Revised: 21 July 2017 / Accepted: 3 August 2017 / Published: 14 August 2017
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Reactive power modulation of wind power plants is an effective way to damp inter-area oscillation in wind power penetrated power systems. For doubly fed induction generator (DFIG) based wind farms, there are two different ways to achieve reactive power modulation: one is via reactive power feedback control, and the other method is via voltage feedback control. While both of the control schemes are feasible, their effectiveness may differ, and there has not been a systematic comparison between them. This paper investigates the differences between these two feedback schemes for inter-area oscillation damping control. The principles of utilizing DFIG for damping control is introduced at first. Then, analytical techniques including the frequency domain analysis, μ -analysis and time domain analysis are used to systematically study the performance of the two control schemes against inter-area oscillation. The robustness of the control schemes with respect to the variety of system operation points is also studied. The results from this paper can provide an insight into the understatement of DFIG reactive modulation against oscillation and guidance for controller design. View Full-Text
Keywords: DFIG; stability enhancement; robustness analysis; reactive power modulation DFIG; stability enhancement; robustness analysis; reactive power modulation

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Liao, K.; Wang, Y. A Comparison between Voltage and Reactive Power Feedback Schemes of DFIGs for Inter-Area Oscillation Damping Control. Energies 2017, 10, 1206.

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