Mechanism analysis of droop control of DFIG influence on system small-signal dynamic stability based on damping torque analysis

被引：0
作者：
Wang Q. [1 ]
Xue A. [2 ]
Zhang X. [1 ]
Shen W. [1 ]
机构：
[1] Suzhou Power Supply Company, Suzhou, 215000, Jiangsu Province
[2] State Key Laboratory of Alternate Electrical Power System With Renewable Energy Source, North China Electric Power University, Changping District, Beijing
来源：
| 1600年 / Power System Technology Press卷 / 41期
关键词：
Damping torque analysis; DFIG; Droop control; Small-signal oscillation mode;
D O I：
10.13335/j.1000-3673.pst.2016.3262
中图分类号：
学科分类号：
摘要：
Droop control can improve frequency response characteristics of doubly-fed induction generators (DFIGs). It also affects coupling between dynamic characteristics of DFIGs and synchronous generators, influencing system small-signal dynamic stability. In this paper, influence mechanism of DFIG droop control on system small-signal dynamic stability was studied based on damping torque analysis (DTA) method. Firstly, basic principle of droop control was presented. Then, based on an extended two machines system, relationship between frequencies of DFIG access point and synchronous generators were derived. Mechanism of DFIG droop control affecting small-signal stability was revealed with DTA. On this basis, effects of droop control gain on system oscillation mode and its relationship with DFIG location and synchronous machine inertias were analyzed. Finally, effectiveness of the theoretic analysis was verified based on modal analysis method. Analysis results show that droop control nature and extent influencing system oscillation mode are related to DFIG location and system inertia distribution. © 2017, Power System Technology Press. All right reserved.
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页码：1091 / 1097
页数：6
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