EN计及LVRT控制的跟网型变换器大扰动建模与稳定性分析
Large-disturbance Modeling and Stability Analysis of Grid-following Converters Considering LVRT Control
- 智慧电力 2026年54卷第3期 页码：12-20
- 作者机构：
1. 1.贵州大学 电气工程学院,贵州,贵阳,550025
2. 贵州电网有限责任公司兴义供电局，贵州 兴义,562400
3. 贵州电网有限责任公司电力科学研究院,贵州,贵阳,550004
- 作者简介：
- 基金信息：
DOI：10.20204/j.sp.2026.03002
中图分类号：-
纸质出版：2026
- 稿件说明：
移动端阅览
王 宇,郑华俊,袁旭峰,张 超,熊 炜,陈可欣,蔡永翔.计及LVRT控制的跟网型变换器大扰动建模与稳定性分析[J].智慧电力,2026,54(3):12-20.
doi:10.20204/j.sp.2026.03002
王 宇,郑华俊,袁旭峰,张 超,熊 炜,陈可欣,蔡永翔.计及LVRT控制的跟网型变换器大扰动建模与稳定性分析[J].智慧电力,2026,54(3):12-20. DOI： 10.20204/j.sp.2026.03002.
doi:10.20204/j.sp.2026.03002 DOI：
摘要
针对弱电网下跟网型变换器（GFL）切换至低电压穿越（LVRT）控制后，因频繁进出LVRT控制而导致暂态失稳的问题，提出一种计及LVRT控制的跟网型变换器大扰动建模与稳定性分析方法。首先，采用可导函数对限幅环节进行光滑化处理，以克服其不可导特性，从而建立计及LVRT限幅控制的全阶非线性微分方程模型；其次，基于Takagi-Sugeno（TS）模糊模型并结合线性矩阵不等式（LMI）方法，构造系统的Lyapunov函数并估算其吸引域，进而系统分析关键参数对LVRT过程中暂态稳定性的影响机制；最后，通过Matlab/Simulink仿真与硬件在环（HIL）实验，验证所构建吸引域的有效性以及系统参数对暂态稳定性的调控规律。仿真与实验结果表明，在LVRT过程中，若系统状态的初始点位于平衡点的吸引域内时，系统能够维持暂态稳定；合理优化控制器参数不仅能够有效扩大吸引域的范围，还能显著增强系统在故障穿越期间的动态鲁棒性与整体暂态稳定性，所提方法可为提升新能源发电系统在电网扰动下的安全运行能力提供理论支撑和工程指导。
Abstract
To address the transient instability issue caused by frequent entry and exit of low voltage ride-through（LVRT）control in grid-following converters（GFL）connected to weak grids after switching to LVRT mode
this paper proposes a large-disturbance modeling and stability analysis method for GFL considering LVRT control. First
a differentiable function is employed to smooth the limiting links
overcoming their non-differentiable characteristics
thereby establishing a full-order nonlinear differential equation model that accounts for LVRT limiting control. Second
based on the Takagi-Sugeno（TS）fuzzy model and combined with the linear matrix inequality（LMI）method
the Lyapunov function of the system is constructed and its region of attraction is estimated
systematically analyzing the influence mechanism of key parameters on transient stability during LVRT. Finally
the effectiveness of the constructed region of attraction and the regulatory effects of system parameters on transient stability are verified through Matlab/Simulink simulations and hardware-in-the-loop（HIL）experiments. Simulation and experimental results indicate that during LVRT
if the initial state of the system lies within the region of attraction of the equilibrium point
the system can maintain transient stability. Reasonably optimizing controller parameters not only effectively expands the region of attraction but also significantly enhances the dynamic robustness and overall transient stability of the system during fault ride-through. The proposed method can provide theoretical support and engineering guidance for improving the safe operation capability of renewable energy generation systems under grid disturbances.
关键词
Keywords
references
国家标准化管理委员会.风电场接入电力系统技术规定GB/T 19963-2024 [S ] .北京：中国标准出版社，2024.
HU Q，JI F，MA F，et al. Matching analysis of LVRT grid code and injection current dependent voltage response of WTC connected to high impedance AC grid [J ] .IEEE Transactions on Energy Conversion，2022，37（3）:2236-2239.
王炳然，薛峰，朱玲，等. 计及低穿有功恢复特性的风电高占比送出系统功角稳定演化规律研究 [J ] .电力系统保护与控制，2025，53（5）:156-167.
潘学萍，黄文婷，郭金鹏，等. 考虑LVRT特性的新能源送端系统功角稳定与电压稳定交互影响分析 [J ] .电力自动化设备，2024，44（10）:24-31.
ZHANG Y，ZHAN M. Transient Synchronous stability analysis of PMSG grid-connected system considering transient switching control under severe faults [J ] .IEEE Transactions on Power Electronics，2025，40（5）:72 98-7314.
HUANG L，XIN H，LI Z，et al. Grid-synchronization stability analysis and loop shaping for PLL-based power converters with different reactive power control [J ] .IEEE Transactions on Smart Grid，2020，11（1）:501-516.
GUAN L，YAO J. Dynamic coupling analysis and small-signal stability for multi-parallel PLL-synchronous VSC-based renewable energy plants during asymmetrical LVRT [J ] .IEEE Transactions on Sustainable Energy，2023，14（4）:2020-2035.
GUAN L，YAO J，LIU R，et al. Small-signal stability analysis and enhanced control strategy for VSC system during weak-grid asymmetric faults [J ] .IEEE Transactions on Sustainable Energy，2021，12（4）:2074-2085.
GUAN L，YAO J. Dynamic stability improvement scheme for dual-sequence PLLs in VSC based renewable energy generation system during asymmetrical LVRT [J ] .International Journal of Electrical Power & Energy Systems，2023，152（8）:1145-1156.
屈克庆，高畅，许跃成，等. 高渗透率下计及并网逆变器动态性能的新型锁相环设计方法及鲁棒性分析 [J ] .电力系统保护与控制，2025，53（14）:69-79.
黎晓，李剑泽，苏晨博，等. 锁相环失步对同步发电机暂态功角稳定性的影响机理分析 [J ] .电力系统自动化，2022，46（22）:101-110.
SUN H，LIN X，HUANG G，et al. The transient instability mechanism and stability‐enhanced LVRT control for VSC riding‐through severe grid voltage sag [J ] .IET Renewable Power Generation，2023，17（8）:2038-2049.
HE X，GENG H，LI R，et al. Transient stability analysis and enhancement of renewable energy conversion system during LVRT [J ] .IEEE Transactions on Sustainable Energy，2020，11（3）:1612-1623.
李锡林，唐英杰，田震，等. 基于改进等面积法则的并网逆变器同步稳定性分析 [J ] .电力系统自动化，2022，46（18）:208-215.
陈俊儒，李冠群，刘牧阳，等. 电网阻抗比对跟网变换器同步稳定性的影响机理 [J ] .中国电机工程学报，2023，43（6）:2331-2339.
刘其辉，吴勇，闫佳颖，等. 考虑相位跳变的双馈风电机组低电压穿越特性分析与暂态过电压抑制 [J ] .太阳能学报，2024，45（5）:86-94.
赖启平，沈沉，杨艳晨，等. 风电机组反复低电压穿越切换系统建模及电压振荡机理分析 [J ] .电力系统自动化，2025，49（7）:46-56.
孙华东，徐式蕴，许涛，等. 新能源多场站短路比定义及指标 [J ] .中国电机工程学报，2021，41（2）:497-506.
马子涵，黄萌，付熙坤，等. 构网型电源接入下新能源场站的稳定运行能力评估 [J ] .电力系统自动化，2025，49（1）:38-46.
俞露杰，付子玉，朱介北，等. 经二极管整流并网的构网型风机大扰动建模与稳定性分析 [J ] .电力系统自动化，2025，49（2）:84-95.
巨云涛，黄炎. 适应非光滑特性的交直流混合电力系统状态估计 [J ] .电力系统保护与控制，2023，51（2）:141-150.
LI X，WANG Z，LIU Y，et al. The largest estimated domain of attraction and its applications for transient stability analysis of PLL synchronization in weak-grid-connected VSCs [J ] .IEEE Transactions on Power Systems，2023，38（5）:4107-4121.
ZHANG C，MOLINAS M，LI Z，et al. Synchronizing stability analysis and region of attraction estimation of grid-feeding VSCs using sum-of-squares programming [J ] .Frontiers in Energy Research，2020，8:3630-3641.
吴浩，李京，甘德强. 基于平方和规划理论的电力系统吸引域估计方法 [J ] .电力自动化设备，2025，45（4）:194-201.
付熙坤，黄萌，凌扬坚，等. 功率耦合和电流限幅影响下构网型变流器的暂态同步稳定分析 [J ] .中国电机工程学报，2024，44（7）:2815-2825.
潘莉，李霞林，王智，等. 弱连接VSC的锁相环同步暂态稳定综述 [J ] .电力自动化设备，2023，43（9）:138-151.
ZHENG H，YUAN X，CAI J，et al. Large-signal stability analysis of DC side of VSC-HVDC system based on estimation of domain of attraction [J ] .IEEE Transactions on Power Systems，2022，37（5）:3630-3641.
ZHU D，ZHOU S，ZOU X，et al. Improved design of PLL controller for LCL-type grid-connected converter in weak grid [J ] .IEEE Transactions on Power Electronics，2019，35（5）:4715-4727.
0
浏览量
24
下载量
0
CSCD
- Meta-XML下载
- BibTeX下载
- Endnote下载
- RefMan 下载
- NoteExpress下载
- NoteFirst下载
关联资源
相关文章
相关作者
相关机构
AI问答- 技术支持由北京北大方正电子有限公司提供 京ICP备09064830号-19
京公网安备11010802024621 - 本系统建议在Chrome、 IE9+ 以上版本浏览器阅读本站内容，360浏览器请切换至极速模式
- Cookies帮助我们提供服务并提供个性化体验。使用本网站，即表示您同意我们使用Cookies