Fault Ride-through Strategy of Voltage-controlled Doubly-fed Wind Turbine Based on Improved Active Disturbance Rejection

被引：0
|
作者：
Xie Z. [1 ]
Cui J. [1 ]
Li Z. [1 ]
Zhang X. [1 ]
机构：
[1] School of Electrical Engineering and Automation, Hefei University of Technology, Hefei
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2022年 / 46卷 / 21期
基金：
中国国家自然科学基金;
关键词：
active disturbance rejection; doubly-fed induction generator; extended state observer; fault ride-through;
D O I：
10.7500/AEPS20210828002
中图分类号：
学科分类号：
摘要：
The voltage-controlled doubly-fed induction generator (VC-DFIG) has good voltage/frequency supporting capacity and its double closed-loop structure of stator voltage and rotor current helps maintain the voltage stability, which makes it more suitable for operation in weak grids. A rotor overcurrent suppression strategy based on the improved active disturbance rejection is proposed for the electromagnetic transient problem under symmetric faults of the power grid with VC-DFIG. Firstly, an active disturbance rejection control scheme of rotor current is constructed based on the VC-DFIG rotor current mathematical model. Then, for the problem of insufficient disturbance estimation by the extended state observer (ESO) at the moment of the voltage drop in the power grid, a certain transient component is introduced into the disturbance estimation. On one hand, the speed and accuracy of the disturbance estimation are further improved, and the rotor overcurrent suppression capability of the VC-DFIG under the fault is enhanced. On the other hand, ESO can suppress the disturbance caused by the change of transient components and reduce the dependence on the accuracy of transient magnetic chain observation, which has better robustness. Finally, the superiority of the proposed scheme is verified by experimental results. © 2022 Automation of Electric Power Systems Press. All rights reserved.
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页码：160 / 169
页数：9
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