Improved control scheme of stand-alone DFIG-based wind energy conversion system with battery energy storage system

被引：5

作者：

Li, Dan-Yun ^{[1
,2
]}

Shen, Qun-Tai ^{[2
]}

Liu, Zhen-Tao ^{[1
]}

Wang, Hui ^{[2
]}

机构：

[1] China Univ Geosci, Sch Automat, Wuhan 430074, Hubei, Peoples R China

[2] Cent South Univ, Sch Informat Sci & Engn, Changsha 410083, Hunan, Peoples R China

来源：

INTERNATIONAL JOURNAL OF COMPUTER APPLICATIONS IN TECHNOLOGY | 2016年 / 54卷 / 03期

基金：

中国国家自然科学基金;

关键词：

three-phase four-leg converter; modified repetitive controller; non-linear loads; unbalanced loads;

D O I：

10.1504/IJCAT.2016.10000523

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

An improved control scheme for stand-alone DFIG-based wind energy conversion system is proposed. The intermediate DC-link of back-to-back PWM converter is supported with a battery energy storage system to smooth the fluctuation of power caused by the variation of wind speed and loads. A three-phase four-leg converter is employed as the Stator-Side Converter (SSC) to provide a path for the zero-sequence current. Based on the modified topology, the stator voltage of DFIG is directly controlled by the SSC. And the rotor speed of DFIG is regulated by the rotor-side converter for maximum power point tracking. Modified repetitive controllers incorporated with the state-feedback controllers are adopted for the SSC to ensure the desirable stator voltage even under the unbalanced loads or non-linear loads conditions. The proposal avoids the complicated operation of the harmonic extraction, and the positive-and negative-sequence current decomposition, which is verified by the simulation results.

引用

页码：211 / 219

页数：9