Control Strategy of Transient Synchronization Stability of Full-scale Wind Turbines During Grid Faults

被引：0
|
作者：
Zeng P. [1 ]
Zhang C. [2 ]
Li Z. [1 ]
机构：
[1] College of Information Science and Technology, Donghua University, Songjiang District, Shanghai
[2] Key Laboratory of Control of Power Transmission and Conversion, Shanghai Jiao Tong University, Ministry of Education, Minhang District, Shanghai
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2022年 / 42卷 / 16期
基金：
中国国家自然科学基金;
关键词：
equal-area criterion; full-scale wind turbine; phase-locked-loop (PLL); stabilization control; transient synchronization stability; voltage source converter (VSC);
D O I：
10.13334/j.0258-8013.pcsee.211041
中图分类号：
学科分类号：
摘要：
The nonlinear dynamic behavior of phase-locked loop (PLL) during grid fault can lead to the transient synchronization stability issue of the full-scale converter-based wind turbines. Such stability issue is mostly related to the existence and property of the equilibrium operating points of the system, i.e., whether or not the system can converge to the existent equilibrium during the grid fault. Firstly, a nonlinear and reduced-order system model was established, based on which the mechanism of transient synchronization instability of the voltage source converter (VSC) was revealed by using the equal-area criterion. The influence of the initial state and equilibrium point on the transient synchronization stability was analyzed in detail, by which the active and reactive current injection boundary conditions for ensuring the system’s stability under a faulty grid condition was obtained. Based on the derived boundary, three types of stabilization control strategies were further formulated. Finally, the time domain simulation model of the full-scale wind turbine was established in the MATLAB/ Simulink. Relevant simulation case studies indicate that the theoretical analysis and the proposed current boundary limitation-based stabilization control strategy were valid. © 2022 Chin.Soc.for Elec.Eng.
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页码：5935 / 5947
页数：12
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