Hybrid Power Synchronization Control Strategy of DFIG-based Wind Turbines and Its Stability Analysis Under Weak Grid

被引：0
|
作者：
Li M. [1 ]
Xie Z. [1 ]
Gao X. [1 ]
Yang S. [1 ]
Zhang X. [1 ]
机构：
[1] School of Electrical Engineering and Automation, Hefei University of Technology, Anhui Province, Hefei
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 21期
基金：
中国国家自然科学基金;
关键词：
doubly-fed induction generator (DFIG); hybrid power synchronization; stability analysis; state space model; weak grid;
D O I：
10.13334/j.0258-8013.pcsee.221495
中图分类号：
学科分类号：
摘要：
With the increasing penetration of renewable energy resources, the “weak” characteristic of the point of common coupling (PCC) has initially appeared. The stability problems caused by the coupling interaction between the phase-locked loop (PLL) and the impedance of the grid in doubly-fed induction generator (DFIG) system are becoming more and more prominent under weak grid. To improve the stability of DFIG under weak grids, the hybrid power synchronization control strategy for grid side converter (GSC) and rotor side converter (RSC) is proposed in this paper. PLL is not required under hybrid power synchronization, the RSC utilizes stator output power to realize stator power synchronization. The GSC utilizes the power deviation on DC capacitance to realize DC power synchronization. According to the proposed control strategy, the full-order state space model of DFIG system is established, and the influence of grid impedance and control parameters on system stability is analyzed. The comparison shows that the hybrid power synchronization control strategy is more stable than the control strategy of stator power synchronization on RSC and phase-locked synchronization on GSC under weak grids. Finally, the validity of the stability analysis is investigated with experiments based on the control-hardware-in-loop (CHIL) platform. ©2023 Chin.Soc.for Elec.Eng.
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页码：8388 / 8399
页数：11
相关论文
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