Admittance Modeling and Subsynchronous Oscillation Risk Analysis of DFIG-based Wind Turbine with Stator Current Control

被引：0
|
作者：
Du, Chengmao [1 ]
Du, Xiong [1 ]
Su, Jingyuan [1 ]
Fan, Lijuan [2 ]
Li, Hongxin [2 ]
An, Yu [2 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing,400044, China
[2] Shenzhen Power Supply Bureau Co., Ltd., Shenzhen,440304, China
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2023年 / 47卷 / 13期
基金：
中国国家自然科学基金;
关键词：
Asynchronous generators - Electric current control - Electric fault currents - Frequency domain analysis - MATLAB - Stators - Wind - Wind power;
D O I：
10.7500/AEPS20221005004
中图分类号：
学科分类号：
摘要：
Stator current control (SCC) has the advantage that the reference current is not affected by doubly-fed induction generation (DFIG) parameter drift. However, the subsynchronous oscillation caused by the DFIG-based wind turbine with SCC and series compensation line will hinder the safe accommodation of wind power. To address this problem, the small signal transfer law of SCC-DFIG is deeply analyzed. Then, considering the influence of DC bus dynamic, frequency coupling and control dynamic characteristics, an admittance model is established to accurately characterize the frequency domain characteristics of the DFIG-based wind turbine. By analyzing the distribution law of negative resistance of DFIG-based wind turbine under all the wind speed conditions, a virtual resistance control strategy for all wind speeds is proposed. The MATLAB/Simulink simulation results show that the DFIG-based wind turbine with SCC has higher oscillation risk than rotor current control. With the increase of SCC proportional coefficient or the decrease of wind speed, the oscillation risk of grid-connected system is greater. The effectiveness of the proposed stability control strategy for subsynchronous oscillation suppression under different wind speed conditions is verified by the simulation. © 2023 Automation of Electric Power Systems Press. All rights reserved.
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页码：159 / 167
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