Approximate Impedance Analysis of Subsynchronous Oscillation Engaged Limiters in Power System Connected With DFIG-based Wind Power

被引：0
|
作者：
Wang Y. [1 ]
Xue J. [2 ]
Wei X. [2 ]
Fu X. [1 ]
Qiao D. [1 ]
Wang Y. [1 ]
Guo P. [1 ]
Xue A. [1 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources (North China Electric Power University), Changping District, Beijing
[2] Institute of Economic and Technology, State Grid Fujian Electric Power Co., Ltd., Fuzhou, 350012, Fujian Province
来源：
Dianwang Jishu/Power System Technology | 2022年 / 46卷 / 05期
关键词：
DFIG; Impedance analysis method; Limiter; Subsynchronous oscillation; SVG;
D O I：
10.13335/j.1000-3673.pst.2021.0758
中图分类号：
学科分类号：
摘要：
To the problem of sub-synchronous oscillation(SSO) caused by the saturation of the limiter, the current researches mainly focus on the influence of the limiter on the grid-connected voltage sourced converter (VSC) system, while the theoretical analyses on the influence of the limiter on the DFIG-based SSO in power system are seldom reported. In this paper, focusing on the power system connected with double-fed induction generators (DFIG) and static var generators (SVG), combined with the influence of limiters on impedance, a impedance method considering the limits is proposed to approximate analysis the phenomenon of SSO engaged with limiters(SSO-L). This analysis reveals that the mechanism of SSO-L is related to the system impedance characteristic with limiters, different from the traditional characteristic. In detail, firstly, the DFIG-based wind power system with SVG and its limiters, as well as the phenomenon of SSO-L are introduced; Secondly, combined with the description function, the impedance model of the simplified DFIG-based wind power system with limiters is established; Thirdly, combined with the impedance model with limiters, the mechanism of the SSO-L is revealed, that is, when the SVG limiter is saturated, the impedance of the DFIG-based wind power system with limiters changes from a positive resistance to negative, resulting in the SSO-L. Finally, considering the cases retaining/removing the limiters, the influence of different limiter values and other control parameters on the impedance characteristics of the system with limiters and the characteristics of the SSO-L is analyzed. © 2022, Power System Technology Press. All right reserved.
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页码：1917 / 1925
页数：8
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