Impact Factor:2.73
DOI number:10.1002/we.1577
Journal:Wind Energy
Key Words:auto-disturbance rejection control (ADRC); doubly fed induction generator (DFIG); proportional resonant (PR) controller; stand-alone wind-power generation; unbalance
Abstract:This paper proposes a coordinated control scheme of a stand-alone doubly fed induction generator (DFIG)-based wind energy conversion system to improve the operation performance under unbalanced load conditions. To provide excellent voltage profile for load, a direct stator flux control scheme based on auto-disturbance rejection control (ADRC) is applied, and less current sensors are required. Due to the virtues of ADRC, the controller has good disturbance rejection capability and is robust to parameter variation. In the case of unbalanced loads, the electromagnetic torque pulsations at double synchronous frequency will exist. To eliminate the undesired effect, the stator-side converter (SSC) is used to provide the negative sequence current components for the unbalanced load. Usually, proportional integral controllers in a synchronous reference frame are used to control SSC. To simplify the algorithm, an improved proportional resonant (PR) control is proposed and used in the current loop without involving positive and negative sequence decomposition. The improved PR provides more degree of freedom which could be used to improve the performance. The effectiveness of the proposed control scheme has been validated by the simulation and experimental results. Copyright (c) 2012 John Wiley & Sons, Ltd.
Co-author:Yao Sun, Hui Wang
First Author:Xing Li
Indexed by:Journal paper
Correspondence Author:Mei Su
Document Code:20140517255408
Discipline:Engineering
First-Level Discipline:Electrical Engineering
Document Type:J
Volume:17
Issue:2
Page Number:317-336
ISSN No.:1095-4244
Translation or Not:no
Included Journals:SCI、EI
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