Flexible power control for rotor-side converter of doubly-fed induction generator under unbalanced voltage condition

被引：0

作者：

Ma J. ^{[1
]}

Liu Q. ^{[1
]}

Wu J. ^{[2
]}

Sun F. ^{[2
]}

Wang Y. ^{[3
]}

Shen Y. ^{[1
]}

Zhou N. ^{[2
]}

机构：

[1] State Grid Anhui Electric Power Company Economic and Technological Research Institute, Hefei

[2] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing

[3] State Grid Economic and Technological Research Institute Co., Ltd., Beijing

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2019年 / 39卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Adjustment coefficient; Doubly-fed induction generator; Power control; Rotor-side converter; Unbalanced voltage;

D O I：

10.16081/j.issn.1006-6047.2019.02.029

中图分类号：

学科分类号：

摘要：

The relationship between the instantaneous active and reactive power of stator and three-phase stator vol-tage and rotor current is analyzed for the rotor-side converter of DFIG(Doubly-Fed Induction Generator) in case of unbalanced voltage. A generalized formula of rotor current reference is achieved by introducing continuous adjustment coefficients. Furthermore, the expressions of command current regulation coefficient, rotor current peak, active and reactive fluctuation of DFIG stator are obtained, respectively. Then, the changing law of control charac-teristics for DFIG with respect to the regulation coefficient and voltage imbalance is analyzed. Moreover, the controllability of DFIG under unbalanced voltage drop is analyzed, and the critical value of stator voltage after voltage drop and the control condition of rotor-side converter are presented respectively. Finally, the flexible power control strategy for DFIG in unity power factor mode and reactive power supporting mode is presented considering the power fluctuation set value and rotor phase current limit, and simulation results verify the effectiveness of the proposed method. © 2019, Electric Power Automation Equipment Press. All right reserved.

引用

页码：196 / 203

页数：7

共 19 条

[1]

Chen Z., Wind power in modern power systems, Journal of Modern Power Systems and Clean Energy, 1, 1, pp. 2-13, (2013)

[2]

Xu L., Coordinated control of DFIG's rotor and grid side converters during network unbalance, IEEE Transactions on Power Electronics, 23, 3, pp. 1041-1049, (2008)

[3]

Liao Y., Wu X., Liu R., Suppression for negative sequence and harmonic current of a doubly-fed induction generator stator in unbalanced grid, Automation of Electric Power Sys-tems, 37, 19, pp. 26-32, (2013)

[4]

Hu J., He Y., Wang H., Et al., Proportional-resonant current control scheme of rotorside converter of doubly-fed induction generators under unbalanced network voltage conditions, Proceedings of the CSEE, 30, 6, pp. 48-56, (2010)

[5]

Xu H., Hu J., He Y., Integrated modeling and enhanced control of DFIG under unbalanced and distorted grid voltage conditions, IEEE Transactions on Energy Conversion, 27, 3, pp. 725-736, (2012)

[6]

Phan V., Lee H., Improved predictive current control for unbalanced stand-alone doubly-fed induction generator-based wind power sys-tems, IET Electric Power Applications, 5, 3, pp. 275-287, (2011)

[7]

Li H., Fu B., Yang C., Et al., Reactive current allocation and control strategies improvement of low voltage ride though for doubly fed induction wind turbine generation system, Proceedings of the CSEE, 32, 22, pp. 24-31, (2012)

[8]

Zheng Z., Yang G., Geng H., A control strategy for doubly-fed induction generator based wind farms equipped with STATCOM under asymmetrical grid fault situations, Proceedings of the CSEE, 33, 19, pp. 27-38, (2013)

[9]

Hu J., He Y., Wang H., Et al., Coordinated control of grid- and rotor-side converters of doubly-fed induction gene-rator under unbalanced network voltage conditions, Proceedings of the CSEE, 30, 9, pp. 97-104, (2010)

[10]

Rodriguez P., Timbus A.V., Teodorescu R., Et al., Flexible active power control of distributed power generation systems during grid faults, IEEE Transactions on Industrial Electronics, 54, 5, pp. 2583-2592, (2007)

← 1 2 →